Sr Backend Engineer Blockchain, Crypto Exchange

Top 3 Reasons To Join Us Directly build core product with Founder 13th-month salary & project bonuses Full tech stack & architecture control The Job Own a core exchange module end to end: design, code, tests, deployment, and its behaviour in production.Build wallet infrastructure and on-chain deposit/withdrawal flows — idempotent retries, network failure handling, safe recovery, and balance reconciliation.Bring the design, estimates, dependencies and technical risks for your module into the shared roadmap, and drive build-vs-integrate evaluations for third-party services, SDKs and node infrastructure in your area.Settle REST and WebSocket contracts with frontend, including real-time market data.Ship to production standards: automated tests, CI/CD, monitoring and alerting, audit logs, access control. Anything touching real assets is reviewed before release.Take operational ownership of what you build: lead triage on incidents in your modules, run the post-mortem, and land the fix that prevents the repeat. Your Skills and Experience 5+ years backend engineering, including production ownership of at least one system that moves real money or real assets — exchange ledger, custody/wallet, payment settlement, trading backend, or equivalent. We want to hear what you personally built and ran.Correctness under concurrency: database transactions, idempotency, monetary precision and rounding, reconciliation, and clean recovery from partial failure.Strong in Go, Java or Rust — or deep Node.js/TypeScript experience with proven handling of concurrency and load. Plus SQL, Redis, a message queue, and WebSocket.Production operations experience: you have deployed it, monitored it, and diagnosed it under pressure.Solid grasp of access control, separation of duties, secure credential storage, and transaction signing.Reads English technical documentation; explains architecture, risk and progress clearly.Nice to haveDirect experience inside a live CEX — order matching, ledger, or wallet — at any scale.Hot/cold wallet architecture or institutional custody integration.TON / Jetton, or Telegram Mini App (TMA) development.Liquidity provider or market maker integrations.Load testing, disaster recovery drills, or security audit participation. Why You'll Love Working Here Salary 45 – 60MWork directly with the founder, building the technical foundation and shaping the product from the earliest stage.Scope of technical decision-making on architecture, technology, and development standards agreed together with the founder.Supporting resources and the on-call rotation arrangement are discussed and clearly agreed before you accept the offer.Young, dynamic and fun working environment.13th month salary, project bonus.Free foods and drinks at pantry.Social insurance and annual leave according to regulations.