Overview

Senior Software Engineer — JavaScript Full-Stack

Responsibilities

• Design, build, and maintain scalable full-stack applications running in production
• Own technical decisions on architecture, data modeling, deployments, and performance trade-offs
• Debug live issues across the stack, identify bottlenecks, and improve performance
• Participate in client conversations: scoping, technical discussions, demos, and updates
• Review code and raise the team's bar — including the judgment to catch when AI-generated code is subtly wrong, overengineered, or a poor fit
• Mentor junior and mid-level engineers and contribute to team engineering standards
• Continuously evaluate and adopt tools and practices that improve delivery
• Work in an Agile / Scrum setup with regular delivery cycles
• 4–6 years building and shipping production JavaScript/TypeScript applications
• Strong full-stack ability — genuinely comfortable owning both React frontends and Node backends; can architect a feature from UI to data layer
• Deep JavaScript and TypeScript — language fundamentals, async patterns, typing discipline, and the ability to teach these to less experienced engineers
• Strong React — advanced hooks, state management, performance optimization, component architecture, and structuring large apps
• Strong Node backend — REST (and ideally some GraphQL or real-time) APIs, auth, error handling, and integrating third-party services; experience with Express, Nest, or similar
• Solid SQL and NoSQL — data modeling across relational and document paradigms; able to pick the right store for the problem and design schemas that hold up under load and change (PostgreSQL, MySQL, MongoDB, or similar)
• Hands-on AWS — deploying and operating applications, comfortable picking up new services, and debugging issues in production cloud environments
• System design fundamentals — caching (Redis/Memcache), queues, REST/API design, and an understanding of scaling and reliability trade-offs
• Track record on live production systems — operating, supporting, and evolving systems, not only greenfield builds or POCs
• Git workflows in a team — branching, reviews, conflict resolution
• Day-to-day use of AI coding tools (Cursor, GitHub Copilot, Claude Code, or similar) and a point of view on where they help vs. hurt
• Strong communication — can explain technical decisions to clients and non-technical stakeholders
• Independence — breaks down ambiguous problems, designs solutions, and ships without hand-holding
• Microservices, API gateways, event-driven patterns
• Caching strategies, queue-based processing, eventual consistency
• Real-time systems (WebSockets, SSE)
• Next.js (SSR/SSG), advanced performance work, design systems
• Accessibility and cross-platform/responsive expertise
• React Native
• CI/CD pipelines, Docker, infrastructure-as-code
• Observability and production monitoring
• LLM-powered features: RAG, agentic workflows, tool use

Qualifications

• About the Role
• We're hiring a senior engineer who can own systems end-to-end on live, production JavaScript/TypeScript applications. You'll work across React frontends, Node backends, and the databases behind them — you don't need to be the deepest expert in every layer, but you should be strong across the stack and able to make architectural calls that hold up.
• This role involves real client interaction, technical decision-making, and shipping into production — not just executing tickets. You'll also be someone the mid-level and junior engineers learn from.

Nice to have

• Automated testing depth (unit, integration, e2e)
• Security fundamentals: auth flows, secrets management, OWASP basics