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Ilia Bulavintsev

@iliabulavintsev

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Lead backend engineer at SPARKET who built its betting platform and integrated seven live partners.

United States

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What I'm looking for

I'm looking for Senior or Lead Backend or Fullstack roles, mainly in Go. I prefer remote-only work aligned with GMT+8, on a contract or full-time basis.

At SPARKET, I built the Go and AWS serverless backend from scratch for a GLI-certified pool-betting platform. It grew to 497k users and 1.83M bets, with 62 Lambda functions and about $700 a month in AWS costs.

I built the pool settlement and payout pipeline, including idempotent retries, and delivered seven live partner wallet integrations that brought about 98% of the platform's users. More recently, I passed Crypto.com Derivatives North America's FIX conformance in four days, shipped a FIX market-data feed to production, and integrated the Novig exchange.

Before SPARKET, I worked on AliExpress supply-chain services at Alibaba Group, Deutsche Bank's FX trading platform, and core order-creation services at OZON.ru. At Chatex, I built a P2P crypto exchange bot that grew to 18k active users. I use Claude Code every day for spec-driven development, code review, and AI agents in operations.

Experience

Work history, roles, and key accomplishments

Current

Lead Engineer

Current

SPARKET

Apr 2021 - Present (5 years 6 months)

Lead engineer of a 6-8 person startup: built the Go + AWS serverless backend from scratch — 497k users, 1.83M bets, ~282k API requests/day.

• Partner wallet integrations: 7 live (Penn, Sportzino, Soboba, Coolbet, Speed Lightning…), ~98% of users
• Pool settlement + payout pipeline (SNS/SQS, idempotent retries): 204k settled pools
• Serverless API: 62 Lambdas, peak 525k requests/day, 0.37% 5xx, ~$

Team Lead, Supply Chain

Alibaba Group

Dec 2020 - Mar 2021 (3 months)

• Led the AliExpress supply-chain team after starting at Alibaba as a senior software developer.

Stack: Java, Kotlin, MySQL

Assistant Vice President, Senior Developer

Deutsche Bank

Sep 2020 - Dec 2020 (3 months)

• Built backend services for the bank's FX trading platform.

Stack: Java, Kotlin

Senior Software Developer

Alibaba Group

Feb 2020 - Dec 2020 (10 months)

• Built AliExpress logistics services that calculate shipping fees and delivery dates, plus shipping-address and seller-center features.

Stack: Java, Kotlin, MySQL

Senior Software Developer

OZON.ru

Dec 2018 - Feb 2020 (1 year 2 months)

• Built core order-creation services in Go as part of the order-management team.
• Split supply-chain logic out of a legacy monolith (stored procedures, Kafka exchanges) into microservices and moved them from MSSQL to PostgreSQL.
• Built services for a new fulfillment center, the largest in Russia, designed for ~100k postings a day.

Stack: Go, PostgreSQL, Kafka, gRPC, Kubernetes, Prometheus, Jaeg

Software Developer

Chatex

Nov 2017 - Dec 2018 (1 year 1 month)

• Built a P2P crypto exchange bot for Telegram and other messengers that grew from launch to 18k active users.
• Built escrow for dispute settlement, payment and KYC integrations, and an omnichannel service that sends one message format to WhatsApp, Telegram, Viber and WeChat.

Stack: Go, Python, PostgreSQL, Redis, gRPC, WebSocket, RabbitMQ

Software Engineer (Android)

Sberbank-Technology

Jul 2017 - Oct 2017 (3 months)

• Built the loyalty module of the Sberbank Online Android app.

Stack: Java, Android, Jenkins

Software Engineer

CDNvideo

Sep 2016 - Jun 2017 (9 months)

• Built Python services that collect traffic statistics from CDNs into ClickHouse.

Stack: Python, Django, Tornado, Flask, PostgreSQL, ClickHouse, Redis