Senior / Staff Full-Stack Engineer — Solana Low-Latency Copy-Trading (Node.js + React)

Required Hard Skills
8+ years of Software Engineering experience
Strong commercial experience with Node.js
Strong experience with TypeScript (strict mode)
Strong experience with React + TypeScript
Experience with backend frameworks such as Nest.js, Express.js, Koa.js
Strong understanding of React, including Hooks, Context, rendering behavior, and performance optimization
Strong experience with state management tools such as Redux, MobX, Zustand, Recoil, or similar
Strong software design knowledge: OOD, FP, design patterns, SOLID principles
Practical hands-on experience with AI-assisted development tools such as Claude Code, Cursor, or similar
Experience building low-latency, high-throughput, highly concurrent systems (real-time processing, hundreds+ of parallel operations)
Experience working with external APIs and third-party data providers
Strong understanding of RESTful APIs and GraphQL APIs
Advanced experience with SQL databases, especially PostgreSQL (transactions, locking, idempotency)
Experience with database performance optimization, indexing, query optimization, and handling large datasets
Experience with async / batch processing, scheduled jobs, background workers, queues, retries, throttling, and rate-limit handling
Hands-on experience with job / message queues such as BullMQ, Redis Streams, Kafka, RabbitMQ, Amazon SQS/SNS, or similar
Experience with Docker and CI/CD processes
Experience with AWS or similar cloud platforms (GCP, Azure)
Experience building systems that require data validation, consistency checks, idempotency, and crash-recovery safeguards
Understanding of trading, fintech, blockchain, or data-intensive financial systems
Knowledge of Agile development practices, preferably SCRUM
Proficient understanding of Git
Required Blockchain / Solana / Copy-Trading Experience
Solid understanding of Solana internals: transactions, instructions, accounts, blocks/slots, commitment levels (processed / confirmed / finalized), blockhash lifetime, and reorg handling
Hands-on experience with low-latency Solana execution / trading bots — landing transactions competitively (same-slot / "block-0"), priority fees, and MEV-aware submission
Experience with real-time Solana data streaming: Yellowstone gRPC (Triton Dragon’s Mouth / Helius LaserStream) and/or shred-level feeds such as Jito ShredStream (awareness of DoubleZero Edge a plus)
Experience with transaction submission & landing infrastructure: Jito (Block Engine / bundles / tips), Helius Sender, SWQoS (stake-weighted QoS), and specialist senders (0slot / Nozomi / bloXroute)
Experience with blockchain data / RPC providers such as Helius, Triton, QuickNode, Alchemy, or similar, including multi-provider failover and rate-limit handling
Familiarity with Pump.fun / PumpSwap: bonding-curve mechanics, AMM pricing, and building instructions from an on-chain IDL
Understanding of trading metrics: entry/exit, market cap, slippage, hit rate, P&L, and per-position / portfolio risk
Experience with crypto trading platforms, copy-trading systems, DEX / on-chain execution, or wallet automation
Experience with secure key management at scale (HD wallet derivation, in-memory signing, secrets isolation) and capital-isolation / fail-safe design