Full Stack Developer - MERN Stack

Valar Ecom is looking for a Full Stack Developer who thrives on solving complex technical challenges and building high-performance, scalable systems. You'll work across the entire stack—from designing intuitive frontend experiences to architecting resilient backend and infrastructure systems. If you love writing clean, type-safe code, enjoy deep architectural discussions, and can balance technical perfection with practical delivery, this role is for you.

The core requirements for the job include the following:

Core Backend (Primary Focus):

• Node.js / Express.js - Building high-throughput APIs and webhook handlers.
• Queue Systems - BullMQ, Redis-backed job processing, worker management.
• Databases - SQL/NoSQL optimisation, indexing, query tuning, connection pooling.
• Distributed Systems - Multi-layer caching, data consistency, resilience patterns.
• API Design - REST, GraphQL, pagination, rate limiting, versioning.

Frontend Development:

• React - Hooks, component composition, lifecycle, performance optimisation.
• TypeScript - Generics, type-safe APIs, type narrowing, strict mode.
• Performance - Virtual scrolling, memoisation, debouncing, lazy loading.
• Real-time - WebSockets, Server-Sent Events, live data updates.
• CSS / Design - Custom styling, responsive design, accessibility-first approach.

Infrastructure and DevOps:

• Deployment - CI/CD pipelines, blue-green deployments, canary releases.
• Monitoring - Prometheus, Grafana, structured logging, alerting systems.
• Performance - Error tracking, benchmarking, load testing, optimisation.

Data Engineering:

• Real-time Pipelines - Event streaming, data processing at scale.
• Consistency - Transaction management, distributed data integrity.
• High Traffic - Handling bursts, spike management, graceful degradation.

Non-Technical Skillsets:

Problem Solving:

• Strong analytical skills with clear trade-off reasoning (e. g., "Why Redis over an in-memory cache for this use case? ").
• Proactively identifying edge cases (What happens when the queue is full? When Redis goes down? ).
• Designing practical solutions under real-world constraints(time, budget, team size).

Communication:

• Writing clear technical documentation (ADRs, API docs, runbooks).
• Explaining complex systems simply (Can you explain connection pooling to a PM? ).
• Documenting architectural decisions with context and rationale.
• Code that communicates intent through naming and structure.

Engineering Judgment:

• Knowing when to optimise vs. when "good enough" is sufficient.
• Example: Choosing between 100ms vs 50ms latency based on user impact.
• Balancing technical debt with feature velocity.
• Understanding business priorities alongside technical excellence.

Quality and Collaboration:

• Designing testing strategies (unit, integration, E2E) that catch real bugs.
• Following security best practices (input validation, OWASP guidelines).
• Writing maintainable, convention-driven code that others can understand.
• Sharing knowledge through documentation, demos, and mentoring.

Experience Level:

• 2+ years with Node.js in production environments.
• Experience with high-volume systems (1000+ req/min preferred).
• E-commerce or logistics experience is a strong plus.

Skills

BullMQ, CI / CD, Express.js, GraphQL, Node.js, React, React.js, Redis, TypeScript, WebSockets