Senior Fullstack Engineer – Node.js, React

4 days ago

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Symbiotic

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Crypto • Fintech • Web 3

Symbiotic is the universal staking framework enabling decentralized networks to bootstrap powerful, fully sovereign ecosystems. Projects use the Symbiotic protocol to source operators and to scale economic security for their decentralized network.

11 - 50 employees

₿ Crypto

💳 Fintech

🌐 Web 3

📋 Description

• Fully own the entire backend of Symbiotic: architecture, services, APIs, databases, performance, reliability, and observability • Design and build new services from scratch with zero hand-holding • Take complete responsibility for everything you ship: you are the go-to person for any question or issue related to your code • Ruthlessly focus on delivering maximum value; challenge requirements when needed • Write exceptionally clean, simple, and over-documented code • Jump into React frontend work whenever required (we’re a small team; speed > strict boundaries) • Proactively propose valuable features and improvements • Collaborate closely with the team, accept feedback openly, and mentor others when needed • Ensure everything is thoroughly tested and production-ready (monitoring, logging, error tracking, security) • Continuously improve performance, scalability, and developer experience across the stack

🎯 Requirements

• 4+ years of production experience as a backend or fullstack engineer • Expert in JavaScript and Node.js internals *(event loop, streams, memory model, async primitives)* • Proven track record independently designing and shipping complete backend services end-to-end • Strong production experience with modern Node.js frameworks *(Fastify, Hono, Elysia, Express, NestJS)* • Advanced PostgreSQL skills: schema design, indexing strategy, query optimization, transaction handling • Strong React + TypeScript frontend background • Docker-native, comfortable with CI/CD (GitHub Actions), basic Kubernetes knowledge • Obsessed with clean, simple, heavily documented code; you write extensive tests and love helping QA with edge-case scenarios • Excellent at algorithms and data structures • Startup mindset: you jump into frontend, infra, or anything else needed to move the product forward • Deeply care about business impact and always understand the “why” behind what you build • Bonus: Web3 experience (EVM, ethers.js/viem, RPC providers, indexing) or working knowledge of Go/Python

🏖️ Benefits

• No contractors, traditional employment agreement