Senior Backend Engineer (Hisar)

About the Role We are looking for a Senior Backend Engineer with deep expertise in building, scaling, and securing production-grade backend systems. You will own the backend of a complex, multi-module SaaS platform covering CRM, payroll, ERP, financial management, and AI-powered automation workflows. We are not looking for a traditional developer. We want someone who works smart — uses modern AI development tools as a core part of their workflow, ships with confidence, and takes real ownership over what they build. Responsibilities
- Design, build, and maintain scalable backend services and APIs across multiple product domains
- Own database architecture, schema design, query optimisation, and migration management
- Design and manage background job processing, queue architecture, and worker systems
- Identify and resolve performance bottlenecks, security vulnerabilities, and reliability issues
- Set up and maintain observability — structured logging, error monitoring, and alerting
- Define and enforce backend engineering standards, patterns, and best practices
- Collaborate with frontend and infrastructure on system integration and deployment Required Skills
- 4+ years of production backend engineering with Node.js and TypeScript
- Deep PostgreSQL knowledge — schema design, indexing strategies, query analysis, migrations
- Solid understanding of distributed systems — queues, async patterns, concurrency, consistency
- Production experience with NestJS and/or Express
- Background job processing — BullMQ, Bull, or equivalent queue systems
- Redis — caching, pub/sub, session management
- API design — REST, WebSockets, real-time communication patterns
- Security — authentication, authorisation, input validation, secrets management
- Performance optimisation — profiling, connection pooling, query tuning, caching strategies
- Observability — structured logging (Pino or equivalent), error tracking (Sentry or equivalent)
- Testing — unit and integration testing for backend services
- AI development tools — Claude, Cursor, Codex, or equivalent (must use these daily, not occasionally) Nice to Have
- Cloud platform experience — GCP, AWS, or Azure (comfortable operating cloud-native applications)
- Docker and containerised deployments
- AI / LLM API integration experience
- Frontend familiarity — the platform is built on React and Next.js What We're Looking For
- Deep backend instincts — you think about failure modes, race conditions, and data integrity by default
- You have operated systems under real load and know what breaks and why
- Security-conscious — you don't need to be reminded to sanitise inputs or rotate secrets
- AI-native — you use Claude, Cursor, Codex, or similar tools as a natural part of how you work, not as a novelty
- Ownership mentality — you see things through from design to deployment to monitoring
- Clear communicator — you can explain technical tradeoffs to both engineers and non-technical stakeholders
- Self-directed — you can take a problem statement and drive it to a solution independently
- Comfortable in large, complex codebases without needing everything to be perfectly clean first
- Not a traditional 9-to-5 developer — you're curious, keep up with what's changing, and apply it How to Apply We evaluate on real work, not CVs. Please share:
- GitHub profile, live products, Upwork profile or open source contributions — show us what you have built
- A brief note on the most complex backend system you have worked on — what it was, your role, and the outcome
- Examples of how you use AI development tools in your day-to-day engineering work
- Anything in this description outside your current experience and how you would close the gap Apply on Kit Job: kitjob.in/job/4n8d4a