Remote full-time or long-term contract role as Senior Full Stack Engineer, Senior Frontend (React) / Backend (Node.js) Engineer or Tech Lead. Interested in product companies and startups in Web3 (TON/EVM) and AI (agents, LLM integrations). Working as a B2B contractor from Kazakhstan (UTC+5), ready for 4-5 hours of overlap with Europe or the US. Available immediately.
Looking for a job
Yeskendir Sarinov
@yeskendirsarinov
Senior Full Stack / Tech Lead, 8+ yrs. TypeScript, React, Node.js, Web3 (TON), AI agents. Built TON Mini App for 12M+ users.
KazakhstanWhat I'm looking for
At TON Station, I delivered Web3 features end to end for a Telegram Mini App platform with 12M+ users, from its React UI to Node.js services. I designed TON transaction flows for Jetton operations and on-chain wallets, and architected security and role-based access.
At Intent IQ, I built and maintained an ad optimization platform that brought ML predictions into production. I also owned PostgreSQL query strategy and indexing for high-volume workloads.
At Citadel.one, I owned an analytics backend handling 7B+ blockchain transaction records and optimized SQL and indexes. I also built wallet visualizations and integrations across blockchain networks and DeFi services.
I built Tagme, a Telegram Mini App for finding travel companions across Kazakhstan, with a React frontend and NestJS and PostgreSQL backend. I also build multi-agent AI tools, including release and UI workflow agents using LangGraph and gpt-oss.
Experience
Work history, roles, and key accomplishments
TS
Senior Full Stack Developer
TON Station
Jun 2024 - Oct 2026 (2 years 4 months)
Delivered Web3 features end to end, from React UI inside the Telegram Mini App to Node.js services with MongoDB and RabbitMQ, on a platform peaking at 4,000 RPS. Designed transaction flows on TON API/SDK and architected a multi-layer security model.
II
Senior Full Stack Engineer
Intent IQ
May 2023 - Apr 2024 (11 months)
Built and maintained an ad optimization platform with Node.js REST APIs and React UI, bringing ML model predictions into production. Owned PostgreSQL performance on high-volume workloads and led refactoring of critical legacy modules.
AS
Senior Full Stack Developer
Aspose
Dec 2021 - May 2023 (1 year 5 months)
Led full-stack delivery for a high-load wine marketplace, handling thousands of concurrent users. Set code-quality standards through code reviews and mentored mid-level developers.
CI
Backend Developer
Citadel.one
Dec 2019 - Dec 2021 (2 years)
Owned the analytics backend with 7B+ transaction records, optimizing SQL and indexes and fixing memory leaks. Built analytics dashboards and wallet visualizations, and integrated ETH/BSC wallets via WalletConnect and MetaMask.
DE
Full Stack Developer
Decode
Sep 2018 - Jul 2021 (2 years 10 months)
Built a course platform with video lectures and automated test runner, and delivered client projects. Taught JavaScript, React, Angular, Node.js, Python, and algorithms.
Education
Degrees, certifications, and relevant coursework
II
International Information Technologies University (IITU)
Bachelor of Science, Computer Science
2017 - 2021
Bachelor of Science in Computer Science from International Information Technologies University (IITU) from 2017 to 2021.
Tech stack
Software and tools used professionally
Availability
Looking for a job
Location
KazakhstanAuthorized to work in
Website
tagme.kzSalary expectations
36k+ USD
Job categories
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