Telegram Open Network (TON) ICO Whitepaper

Telegram
PRIMER

Table of Contents
Introduction 3
Problem Statement 3
Outline of the Vision 4
A Brief History of Telegram 5
Telegram Open Network (TON) 7
TON Blockchain 7
Infinite Sharding Paradigm 7
Instant Hypercube Routing 8
Proof-of-Stake Approach 8
2-D Distributed Ledgers 8
TON Platform 8
TON Storage 8
TON Proxy 9
TON Services 9
TON DNS 9
TON Payments 9
Telegram Messenger-TON Integration 10
Light Wallet 10
External Secure IDs 11
Ecosystem 12
Bot Platform 12
Groups and Channels 12
Digital Content and Physical Goods 12
A Gateway to Decentralized Services 13
Uses of TON as a Cryptocurrency 13
Roadmap 14
Token Distribution 15
Use of Funds 17
Governance 18
Team 19
Founders 19
Other Notable Team Members 20
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Introduction
Cryptocurrencies and other blockchain-based technologies have the potential
to make the world more secure and self-governed. owever to this day
no consensus-backed currency has been able to appeal to the mass market
and reach mainstream adoption.
his paper outlines a vision for a new cryptocurrency and an ecosystem capable of meeting the
needs of hundreds of millions of consumers including million elegram users.
aunching in this cryptocurrency will be based on multi-blockchain Proof-of-€take system —
ƒ„ …Telegram Open Network, after 2021 The Open Network† — designed to host a new generation
of cryptocurrencies and decentrali‡ed applications.
The protocol and other components of TON are described in detail in the Technical White Paper, while this document focuses
on a general overview of the proposed technolog and its uses
Problem Statement
ˆitcoin has established itself as the «digital gold» and Ethereum has proved to be an efficient
platform for token crowd sales. owever there is no current standard cryptocurrency used for the
regular e‹change of value in the daily lives of ordinary people. he blockchain ecosystem needs
a decentrali‡ed counterpart to everyday money — a truly mass-market cryptocurrency.
Œ Ž Œ

Despite their revolutionary potential, existing cryptocurrencies lack the qualities required to attract
the mass consumer. There are three main hurdles in today’s environments:
The established blockchain networks — Bitcoin and Ethereum — play important
roles in the ecosystem, but don’t have the capacity to replace VISA or Mastercard.
In their current architecture they are limited to a maximum of only 7 transactions
per second for Bitcoin and 15 transactions per second for Ethereum, resulting
in insufficient speeds and higher transaction costs.
Regular users starting to engage with Bitcoin and similar technologies often get
confused when trying to buy, store, and send their coins.
The market of goods and services that can be bought with cryptocurrencies
is limited, and the demand for crypto-assets comes mainly from investors,
not consumers.

The current state of blockchain technology resembles automobile design in 1870: it is promising and
praised by enthusiasts, but inefficient and too complicated to appeal to the mass consumer. As a
result, no cryptocurrency or decentralized platform has gone truly mainstream, and centralized
solutions continue to dominate the market.
Outline of the Vision
Exchanging value should be as easy as exchanging information, and blockchain technology offers
the ideal foundation to make this a reality. To reach mainstream adoption, a cryptocurrency —
and its underlying blockchain design and ecosystem — requires:
Speed and scalability that allows for processing millions of transactions per
second and accommodating hundreds of millions of active users and millions
of applications.
Intuitive user interfaces that enable an average user to easily buy, store,
and transfer value, as well as use decentralized apps in a natural way.
An engaged user base that serves as the pre-existing critical mass necessary
for the ecosystem to grow and eventually become adopted by hundreds of millions
of users.
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Telegram is uniquely positioned to establish the first mass-market cryptocurrency
by providing a platform that combines these properties.
Telegram will use its expertise in encrypted distributed data storage to create TON, a fast and
inherently scalable multi-blockchain architecture. TON can be regarded as a decentralized
supercomputer and value transfer system. By combining minimum transaction time with maximum
security, TON can become a VISA/Mastercard alternative for the new decentralized economy.
The Telegram Team will rely on its 10-year experience in building user-friendly interfaces for
tens of millions to create light wallets, exchanges, and identification services that will allow users
to get on board with cryptocurrencies in an intuitive way.
Integrated into Telegram applications, the TON wallet will become
the world’s most adopted cryptocurrency wallet.
Telegram will leverage its existing ecosystem of communities, developers, publishers, payment
providers, and merchants to drive demand and value for TON cryptocurrency. A whole new
economy saturated with goods and services sold for cryptocurrency will be born — similar
to WeChat’s fiat-based marketplace, but not confined to a centralized service.
A Brief History of Telegram
Telegram was founded in 2013 by libertarians to preserve freedom through encryption. The
project has declared not-for-profit goals and remains independent and self-funded. Like
1
Wikipedia, which for years has been a role model for the Telegram founders , Telegram has
chosen a .org domain to emphasize its non-commercial status.
The physical infrastructure of Telegram reflects its founders’ belief in larger decentralization.
Telegram deploys a distributed server infrastructure to synchronize encrypted data across multiple
independent server clusters spread across different continents and jurisdictions.
The resulting combination of speed, encryption, and independence attracted millions of users
2
within a few months after the project’s launch in 2013. Telegram kept evolving with an average
of 12 major updates a year. By February 2016, it had 100 million monthly active users and was
delivering 15 billion messages daily.
1. Founder of Facebook for Russia donates $1M to Wikipedia at DLD.
2. Why Telegram has become the hottest messaging app in the world.
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In October 2017, Telegram reached 170 million monthly users, delivering 70 billion messages every
day.3 At least 500 000 new users join Telegram daily. At this rate, the service is expected to hit
200 million monthly users in Q1 2018. These users can provide the required critical mass to push
cryptocurrencies towards widespread adoption.
3. Push notifications delivered on iOS and Android devices daily.
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Telegram
Open Network (TON)
ˆecause taking cryptocurrencies mainstream in would not be possible using the
e‹isting blockchain platforms4 elegram co-founder ‘r. „ikolai ‘urov set out to find
a novel solution to meet the speed and scalability re’uired for mass adoption. is
research resulted in the design for the elegram ƒpen „etwork — a fast and secure
blockchain and network pro“ect.
BLOCKCHAIN PLATFORM
TON
TON Blockchain
5
”t the core of the platform is the ƒ„ ˆlockchain — a scalable and fle‹ible blockchain architecture
•
that consists of a master chain and up to accompanying blockchains. ˆelow are some notable
design choices that allow the ƒ„ ˆlockchain to process millions of transactions per second.
Infinite Sharding Paradigm
o achieve scalability ƒ„ has built-in support for sharding– ƒ„ blockchains can
automatically split and merge to accommodate changes in load. his means that new blocks
are always generated ’uickly and the absence of long ’ueues helps keep transaction costs
low even if some of the services using the platform become massively popular.
ee «nfinite harding Paradigm», 2.1.2
—. €ee sections . and .• in the echnical ˜hite Paper for a comparison of blockchain pro“ects.
™. €ee section in the echnical ˜hite Paper.
š Ž Œ

Instant Hypercube Routing
ƒ„ blockchains use smart routing mechanisms to ensure that transactions between any two
blockchains will always be processed swiftly regardless of the si‡e of the system. he time
needed to pass information between ƒ„ blockchains grows logarithmically with their number
so scaling to even millions of chains will allow them all to communicate at top speed.
ee « percube outing» and «nstant percube outing», 2.1.4, 2.4.19, 2.4.20
Proof-of-Stake Approach
ƒ„ uses a Proof-of-€take approach in which processing nodes …«validators»† deposit stakes
to guarantee their dependability and reach consensus through a variant of the ˆy‡antine ›ault
olerant protocol. his allows ƒ„ to focus the computing power of its nodes on handling
transactions and smart contracts further increasing speed and efficiency.
ee «Proof€Of€take ‚pproach», 2.1.16, 2.6
2-D Distributed Ledgers
ƒ„ can «grow» new valid blocks on top of any blocks that were proven to be incorrect to
avoid unnecessary forks. his self-healing mechanism saves resources and guarantees that
valid transactions will not be discarded due to unrelated errors.
ee «‚ccount chains», 2.1.1, 2.1.17
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TON Platform
”s a multi-blockchain pro“ect ƒ„ re’uires sophisticated network protocols — such as the ƒ„
6
PP „etwork used to access the ƒ„ blockchains — that can be reused to give a significant boost
in fle‹ibility to the platform. he following components are scheduled to be released after the ƒ„
ˆlockchain core and will further increase the potential uses of the ƒ„ infrastructure.
T Storage
ƒ„ €torage is a distributed file-storage technology accessible through the ƒ„ PP
„etwork and available for storing arbitrary files with torrent-like access technology and
smart contracts used to enforce availability. his component not only enables storage services
akin to a distributed ‘ropbo‹ but also paves the way for more comple‹ decentrali‡ed apps that
re’uire storing large amounts of data such as œoutube — or elegram.
ee «TON torage», 4.1.8 and «s it possible to upload ƒacebook into blockchain„» 2.9.13
T Proy
ƒ„ Pro‹y is a network pro‹yŽanonymi‡er layer used to hide the identity and IP addresses
of ƒ„ nodes. €imilar to IP …Invisible Internet Pro“ect† this layer can be used to create
decentrali‡ed žP„ services and blockchain-based ƒR alternatives to achieve anonymity and
protect online privacy. In con“unction with the ƒ„ PP „etwork and ƒ„ ‘„€ ƒ„ Pro‹y
can make any service including elegram effectively immune to censorship.
ee «TON Pro…», 3.1.6, 4.1.6
Ÿ. €ee «ƒ„ „etworking» €ection Œ of the technical whitepaper.
• Ž Œ

T Serices
ƒ„ €ervices provides a platform for third-party services of any kind that enables
smartphone-like friendly interfaces for decentrali‡ed apps and smart contracts as well as a
˜orld ˜ide ˜eb-like decentrali‡ed browsing e‹perience.
ee «TON ervices and ‚pplications», 4
T DS
ƒ„ ‘„€ is a service for assigning human-readable names to accounts smart contracts
services and network nodes. ˜ith ƒ„ ‘„€ accessing decentrali‡ed services can be similar
to viewing a website on the ˜orld ˜ide ˜eb.
ee «TON †N», 4.3.1, 4.3.2, 4.3.3
T Payments
ƒ„ Payments is a platform for micropayments and a micropayment channel network. It
can be used for instant off-chain value transfers between users bots and other services.
€afeguards built into the system ensure that these transfers are as secure as on-chain
transactions.
ee «TON Paments», ‡ightning€stle off€chain transactions, 5
”ll these services can be integrated with third-party messaging and social networking applications
uniting the centrali‡ed and the decentrali‡ed worlds.
Ž Œ

Telegram Messenger-TON
Integration
elegram-ƒ„ integration will provide a clear path to cryptocurrencies for millions
of people. elegram Messenger will not only serve as an e‹ample of the possibilities
offered by integrating with ƒ„ but will also add uni’ue features to the ƒ„
platform leveraging elegram’s massive user base and developed ecosystem.
Light allet
he ƒ„ architecture supports light clients that can run on mobile devices without consuming
significant resources. ƒ„ light wallets will be built into elegram applications allowing millions of
users to store their funds securely in the ƒ„ blockchain. he wallet owners will be the sole holders
of the corresponding encryption keys.
ee «ˆerkle proofs», 2.3.11‰ «‡ight wallet and TON entit e…plorer», 4.3.19
elegram mobile and desktop applications with integrated wallets will also double as ƒ„ clients
enabling secure transfers of value within the ƒ„ blockchain and interaction with ƒ„ smart
contracts and applications. elegram will offer streamlined interfaces for sending value to contacts
and paying for purchases in ƒ„.
ee «TON †N use cases», 4.3.2‰ «‡ight wallet and TON entit e…plorer», 4.3.19‰ TON Paments, 5
Integrated into elegram applications the ƒ„-elegram wallet will instantly become the world’s
most adopted cryptocurrency wallet.
he ƒ„ coins e‹changed by elegram users will be called «¢rams» and denoted by the ƒ„
triangular symbol or the gem emo“i. he ¢ram will serve as the principal currency for the in-app
economy on elegram and like any other cryptocurrency will be available for e‹ternal use.
Ž Œ

External Secure IDs
According to Tokenmarket, 84 percent of blockchain-based projects have an active Telegram
7
community, more than all other chat applications combined. Forbes and other media outlets have
called Telegram the «cryptocurrency world’s preferred messaging app» and «as ubiquitous to the
cryptocurrency world as Snapchat is to a teenager».8
OFFICIAL ICO Past 238 projects
DISCUSSION GROUPS Current 79 projects
Upcoming 113 projects
84%
78%
64%
53% 57%
51%
2% 3% 5%
TELEGRAM SLACK DISCORD
Based on data from Tokenmarket.net for Oct 2017.
Because the majority of actors in the new digital economy already have active Telegram accounts,
it is natural for Telegram to offer a secure universal ID. After passing KYC-AML on Telegram
once, users will get a virtual passport to log into services that require user verification, thereby
eliminating a major point of friction for anyone engaging with crypto-assets.
All private data (such as passport scans) will eventually be stored end-to-end encrypted with a key
known only to the owners. Telegram’s distributed servers (and later the TON Blockchain) will
have no access to this information, but will instead store a hash of the value to be able to confirm
that the data was verified when the user obtained their secure ID. Third parties will be able to add
further verifications to these virtual passports.
7. Data from Tokenmarket, as of October 2017.
8. Russia Fines Cryptocurrency World's Preferred Messaging App, Telegram.
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Ecosystem
Telegram’s existing ecosystem will offer simple ways of buying the TON coins (Grams), and a range
of services to spend them on, driving demand and fundamental value for the cryptocurrency.
Bot Platform
As of October 2017, more than 800 000 unique third-party bots are regularly used by 52
million Telegram users. These bots can already accept credit card payments from users in 200
9
countries via eight providers connected to the Telegram Payments Platform. In the future, by
using their verified IDs in conjunction with bots that accept credit cards, Telegram users will be
able to buy and exchange cryptocurrencies in a frictionless and legally compliant way.
Telegram will provide a unified entry point for users willing to connect with bots that offer
exchange services, effectively creating a competitive market.
Groups and Channels
The Telegram ecosystem includes millions of public group chats reaching up to 30 000
members and broadcast channels, the largest of which have several million subscribers.
Telegram’s public broadcast channels generate over 30 billion views by 80 million users each
month. Creators of large channels currently try to monetize them by posting advertisements
or promoting other channels and groups. However, they presently lack the necessary tools to
formalize their transactions with advertisers.
To fix this, Telegram will launch a TON-based ad exchange where parties interested in
promoting their projects can connect with the relevant channel owners and negotiate a price
in a transparent and fully automated way. All accompanying transactions will be made in
Grams on a per-view or per-click basis, with the necessary statistics and guarantees provided
to all parties.
Digital Content and Physical Goods
Bots, channels, and groups provide a ready market for paid content and subscription services.
Users will be able to support publishers and content creators by making donations or paying
for exclusive access. Bots can act as virtual storefronts and accept orders for the delivery of
physical goods. Telegram’s in-app economy will supply the TON market with a wide range of
goods and services that can be obtained with TON coins.
9. Bot API Payments: https://core.telegram.org/bots/payments.
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A Gateway to Decentralized Services
Telegram will offer a searchable registry of decentralized services from its applications,
providing a list of the most popular apps, as well as recommendations based on the user’s
history of choices. These steps can make Telegram a gateway to blockchain-based projects
for the masses — similar to how Google Play and the App Store currently work for centralized
applications.
Uses of TON
as a Cryptocurrency
In addition to payments for all digital and physical assets sold by individual
merchants within the Telegram ecosystem and on other projects integrated with
TON, the TON coins (Grams) will be used as:
› Commission («gas») paid to TON nodes («validators») for processing transactions
and smart contracts;
› Stakes deposited by validators to be eligible to validate transactions and generate
new blocks and coins;
› Capital lent out to validators in exchange for a share of their reward;
› Voting power required to support or oppose changes in the parameters
of the protocol;
› Payment for services provided by apps built on the platform (TON Services);
› Payment for storing data securely in a decentralized way (TON Storage);
› Payment for registering blockchain-based domain names (TON DNS) and hosting
TON-sites (TON WWW);
› Payment for hiding identity and IP addresses (TON Proxy);
r bypassing censorship imposed by local ISPs (TON Proxy).
› Payment fo
All of these services can be free for the users since the application owners may choose to cover the
corresponding fees, and adopt a freemium or an advertisement-based business model.
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Roadmap
he ƒ„ and elegram technical roadmaps include the following milestones–
aunch of elegram Messenger and the elegram ”PI
aunch of the ˆot ”PI and Platform
aunch of the Payments Platform
€tart of the development of ƒ„
€ aunch of elegram E‹ternal €ecure I‘
€ aunch of the Minimal žiable est „etwork of ƒ„
€ esting and security audits of ƒ„
‚ € ‘eployment of the stable version of ƒ„
‚ € aunch of elegram ˜allet
ƒ Creation of ƒ„-based economy in elegram
ƒ aunch of ƒ„ €ervices ƒ„ €torage and ƒ„ Pro‹y
elegram will also continue shipping monthly product updates that are not related to ƒ„.
™ Ž Œ

Token Distribution
o obtain the resources re’uired to make ƒ„ a reality elegram is launching a token
10
sale in £ . he token sale will likely use a €”› to be converted – to native
ƒ„ tokens …¢rams† after the deployment of the ƒ„ ˆlockchain in £— .
he total supply of native ƒ„ tokens …¢rams†
will e’ual ™ billion.
”fter the ƒ„ ˆlockchain is fully deployed the annual inflation rate derived from the fundamental
parameters of ƒ„ is pro“ected at two percent. his inflation represents a payment made by all
members of the community to the validators for keeping the system functional.
ee «Šalidators», 2.6.1, «Original suppl, mining rewards and inflation», A.3
›our percent of the supply … million ¢rams† will be reserved for the development team with a
—-year vesting period. ‘uring the initial stage of active ƒ„ development at least ™ percent of
the entire supply will be retained by the ƒ„ Reserve to protect the nascent cryptocurrency from
speculative trading and to maintain fle‹ibility at the early stages of the evolution of the system.
he remaining —— percent …. billion ¢rams† can be sold in accordance with the formula below–
−• n
p –¤ . × … ¦ † ¨€‘
n
he price of the first token to be sold will be appro‹imately . ¨€‘ with and each successive
token will be priced one billionth higher than the previous one. ”s a result the additional supply
. €ee the €”› Pro“ect.
Ÿ Ž Œ

coming from the ƒ„ Reserve will always be more e‹pensive than the price paid by any of the
e‹isting buyers.11 his structure should allow the market to define the fair price and volume for the
token sale.
” bulk pre-sale of ƒ„ tokens to a group of institutional investors for a fiat currency is possible
under the average price per token or higher depending on the vesting period and the volume
of the transaction.
price per token, ‹ 22

€
ƒ
‚
„

…
†
2

tokens sold, bln
2 2
——© potentially
—© sold investors
—-year vesting retained
by developers ™© by the ƒ„ Reserve
. €ee section ”.— in the echnical ˜hite Paper «ƒriginal price of ¢rams».
š Ž Œ

Use of unds
›unds raised during the elegram ICƒ will be used for the development of elegram
and ƒ„ and for the ongoing e‹penses re’uired to support the growth of the
ecosystem.
More than percent of collected funds will be spent on e’uipment bandwidth
colocation and user verification costs. he rest will be allocated for wages offices and legal
and consulting services.
80% 20%
he annual budget of elegram in š amounted to ªš million out of which ªŸ million were
spent on e’uipment bandwidth colocation and user verification costs. elegram’s spending is
pro“ected at ª— million in the ne‹t three years …appro‹imately ª million in ª Œ million
in • and ª š million in †. ” total spending of about ªŸ million to support continuing
organic user growth should allow elegram to reach one billion active users by «anuary .
MA„… mln B†‡get… ˆ mln
‰

‚

‚‰

€

— ™ Ÿ š • — ™ Ÿ š •
Ž Œ

Governance
The founders of Telegram will be responsible for the efficient use of funds resulting
from any sale of tokens from the TON Reserve. Over time, all responsibilities related
to TON and its Reserve will be transferred to the TON Foundation, a not-for-profit
organization.
By 2021 the initial TON vision and architecture will have been implemented and deployed. TON will
then let go of the «Telegram» element in its name and become «The Open Network».
From then on, the continuous evolution of the TON Blockchain will be maintained by
the TON Foundation.
Telegram will serve as a launch pad for TON, ensuring its technological superiority and widespread
adoption on the initial stages, but the future of TON is in the hands of the global open-source
community.
Telegram Open Network The Open Network
19 / 23

Team
elegram has a world-class team of ™ developers that were selected from thousands
of contenders over the last ten years. o become part of the team each of its current
members had either to win in the world’s top programming contests or to take the
first place in one of the nationwide multi-level coding competitions held by the
founder of elegram.
Core team members have ten years of e‹perience in building scalable pro“ects for tens of millions
of users. ˆefore building elegram they created ž¯ the largest Europe-based social network with
more than 100 million active users which still en“oys a dominating share in its local markets.
he elegram backend team which has an unparalleled ratio of winners of worldwide
coding competitions speciali‡es in creating secure data storage engines for distributed server
infrastructures. ”ll networking cryptographic and database engine software running on thousands
of elegram servers is custom-built by these developers.
Fo†n‡erŠ
Dr. Nikolai Durov
Ph‡ ‹Bonn „niŒerŠitŽ‘… Ph‡ ‹Saint’PeterŠb†rg State „niŒerŠitŽ‘
› Œ-present– Co-founder Cƒ ”rchitect ead CŽC¦¦ Engineer at elegram. ˆuilt
MProto and elegram’s distributed data storage engines®
› Ÿ- Œ– Co-founder Cƒ ”rchitect ead CŽC¦¦ Engineer at ž¯. ˆuilt data storage
and networking software.
A“ar‡Š
› ”bsolute ˜orld Champion in Programming … † — one of ten people
in history to win the ”CM International Collegiate Programming Contest twice®
› ¢old Medals in International Mathematical ƒlympiads … ••Ÿ ••š ••†®
› ¢old and €ilver Medals in International ƒlympiads in Informatics
… ••™ ••Ÿ ••š ••†.
„ikolai is a renowned mathematician and a world-class programmer uni’uely combined
12
in one person. ”t the age of „ikolai already solved cubic e’uations. e started coding
. „ikolai was invited to demonstrate this skill on the main ž channel of Italy where the ‘urovs
lived at the time.
Ž Œ

at • and by Œ he built a full-fledged operating system for Intel ŒŸ microprocessors in
‹Ÿ assembly language. ˜hile spending summers in €iberia without access to a computer
-year old „ikolay filled hundreds of pages with ‹Ÿ assembly code creating programs such
as a ›orth interpreter entirely on paper. ”s a Cƒ and guru in distributed systems he scaled
ž¯ and then elegram to tens of millions of daily users. In — „ikolai became interested in
ˆitcoin and related technologies. is research on these topics culminated in ƒ„’s echnical
˜hite Paper where he summari‡ed the advancements of blockchain technology and
proposed a novel architecture for scalable decentrali‡ed ledgers.
Pavel Durov
› Œ-present– Co-founder CEƒ Product Manager at elegram®
› Ÿ- Œ– Co-founder CEƒ Product Manager ead ‘eveloper at ž¯.
A“ar‡Š
› he most promising „orthern European leader under Œ … —†®13
14
› œoung ¢lobal eader by the ˜orld Economic ›orum … š†.
Pavel first gained international recognition for founding ž¯ which under his leadership
commanded a š percent market share in Russia ¨kraine and ˆelorussia eclipsing ›acebook
and other competing social networks. ”n outspoken libertarian he published free market
manifestos urging the Russian government to deregulate and decentrali‡e the country’s
economy. Pavel was forced to sell ž¯ and leave Russia in — after a clash with the
government over his users’ privacy and freedom of speech.
Pavel started coding at and at he already created his first multiplayer strategy
game. ”s a teenager he built popular online communication tools for fellow students. ”t
he single-handedly coded the first version of ž¯. Pavel founded elegram and became
interested in cryptocurrencies in Œ when he spent ª .™ million of his savings on ˆitcoin
that he holds to this day.
Œ. ž¯ontakte’s ›ounder Pavel ‘urov the Most Promising „orthern European eader ¨nder
the ”ge of Œ.
—. œoung ¢lobal eader Class of š.
Ž Œ

Other Notable Team MemberŠ
liaksei evin
› Œ-present– CŽC¦¦ Engineer at elegram. ‘eveloped distributed data storage engines
client cross-platform libraries and the bot ”PI®
› - Œ– CŽC¦¦ Engineer at ž¯. ˆuilt data storage engines and created the custom
programming language ¯PP for high-level backend developers.
A“ar‡Š
› ¢old Medal ”CM International Programming Contest ˜orld ›inals … †®
› €ilver Medal ”CM International Programming Contest ˜orld ›inals … †®
› ›irst Pri‡e International Mathematics Competition for ¨niversity €tudents …•†®
› ¢old Medal ›irst Place International Mathematical ƒlympiad …™†®
› €ilver Medal International Mathematical ƒlympiad …—†.
italik altman
› Œ-present– CŽC¦¦ Engineer at elegram. ‘eveloped networking and data storage
engines®
› - Œ– CŽC¦¦ Engineer at ž¯. ‘eveloped networking and data storage engines.
A“ar‡Š
› €ilver Medal ”CM International Programming Contest ˜orld ›inals …Ÿ†®
› —th place op Coder ƒpen®
› —th place op Coder Collegiate Contest.
rsen mirnov
› Œ-present– CŽC¦¦ Engineer at elegram. ‘eveloped server data storage engines client
cross-platform libraries and bot ”PI®
› - Œ– CŽC¦¦ Engineer at ž¯. ‘eveloped data storage engines and created the
custom programming language ¯PP for high-level backend developers.
A“ar‡Š
› ¢old Medal ”CM International Programming Contest ˜orld ›inals … †®
› €ilver Medal ”CM International Programming Contest ˜orld ›inals … †.
Ž Œ

‚o€n gor
› —-present– Client C¦¦ Engineer at elegram. › —-present– ead ˆackend Engineer at elegram.
€ingle-handedly built elegram ‘esktop® ˆuilt the entire elegram ”PI for client apps®
› š- Œ– ead backendŽfrontend Engineer at ž¯ › š- Œ– ead backendŽfrontend Engineer at ž¯
after winning a nationwide contest in «€. after winning a nationwide contest in «€.
Drlo Peter
› —-present– ”ndroid Engineer at elegram after › —-present– iƒ€Ž€wift Engineer at elegram.
winning a nationwide contest in ”ndroid «ava. ˆuilt ˆuilt elegram for iƒ€ …ƒb“ective C†. ˆuilt elegram
elegram for ”ndroid® ˆeta for iƒ€ …€wift†®
› - Œ– iƒ€ Engineer at ž¯ after winning a › - Œ– iƒ€ Engineer at ž¯ after winning a
nationwide contest in ƒb“ective C. nationwide contest in ƒb“ective C.
ris€a olar
› Ÿ-present– Cross Platform ‘eveloper › —-present– ˆackendŽ›rontend Engineer at
at elegram. ˆuilds voice calls® elegram. ˆuilt the Instant žiew Platform the
› - Ÿ– ”ndroid Engineer at ž¯ after winning ranslations Platform telegra.ph telesco.pe etc.®
a nationwide contest in «ava for ”ndroid. €ingle- › - Œ– ead backendŽfrontend Engineer at ž¯
handedly built the ž¯ app for ”ndroid. after winning a nationwide contest in «€.
la gor
› Œ-present– iƒ€Ž€wift Engineer at elegram after › Œ-present– Infrastructure ”rchitect at elegram.
several winning a nationwide contest in ƒb“ective €caled elegram to tens of thousands of servers®
C. ˆuilt multiple features for elegram iƒ€. › - Œ– €enior €ystem Engineer. €caled ž¯
to tens of thousands of servers.
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