Staff Full Stack Developer (with Solana experience ONLY)

Position: Senior Full-Stack Engineer Solana Low-Latency Copy-Trading (Node.js + React)
Level: Senior

Required Hard Skills
6+ 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
Experience with trading systems, bots, DeFi or high-throughput financial systems strongly preferred.

Would Be Great
Experience writing performance-critical services in Rust (a native signing / execution hot-path is on the roadmap)
Experience running leader-proximate bare-metal / colocation (Frankfurt / Amsterdam) and host/network tuning for latency
Experience with Jito bundles, durable nonces, and transaction idempotency / reconciliation against chain
Experience integrating CEX withdrawal APIs (Binance / MEXC / KuCoin) for programmatic funding
Experience with observability tools such as Prometheus, Grafana, Datadog, Sentry, ELK, OpenTelemetry, or similar
Experience designing systems with fallback providers, retry logic, throttling, circuit breakers, and API-usage monitoring
Experience building HFT / MEV / market-making or other latency-sensitive financial systems

Responsibilities
Build and maintain full-stack features for ARES, a private copy-trading bot for the Pump.fun / Solana ecosystem
Design and implement the block-0 execution engine: real-time target detection, pre-trade gating, and same-slot buy submission across multiple routes
Integrate low-latency detection (Yellowstone gRPC / Jito ShredStream) and submission (Helius Sender / Jito bundles / SWQoS / specialist senders) with multi-provider failover
Build the wallet lifecycle & custody layer: provisioning isolated child-wallet pairs per task, funding, profit skimming, and drain-to-vault under strict capital isolation
Implement position & exit management (rule-driven take-profit, sell-after-inactivity, chase-sells) and the per-task kill-switch / risk protection
Implement idempotency, durable intent, and crash / reorg reconciliation so no trade is ever double-executed at scale
Build the operator dashboard (React): copy-task configuration, live task & health monitoring, controls (pause / resume / kill), and global safety limits
Construct Pump.fun bonding-curve buys from the live IDL, with graduation gating and pre-trade safety checks
Design controlled concurrency, batching, throttling, retries, and rate-limit handling to sustain 1,000+ tasks / ~2,000+ wallets
Optimize the detect decide sign submit land path to maximize block-0 landing rate (KPI #1) and uptime / failover (KPI #2)
Implement secure key management (HD derivation, in-memory signing) and secrets handling; enforce fail-safe defaults and an explicit kill switch on every execution path
Collaborate with product, engineering, and domain stakeholders on trade-offs across latency, cost, and reliability; participate in architecture discussions
Write clean, secure, maintainable, well-tested code (unit + e2e); conduct code reviews; maintain documentation; support production readiness
Monitor system reliability, execution latency and landing rate, provider health, and data quality

English Level
Upper-Intermediate or higher