Full Stack Engineer

Job Description Role Summary We're Wellness Coacha B2B wellness platform. We're hiring a dedicated, AI-first full-stack engineer with a backend emphasis who owns features end-to-end across Node.js/TypeScript/NestJS (primary) and React/TypeScript (secondary). You'll ship with strong CI/CD, uphold SonarQube quality gates, and drive scaling & optimization across the stack. Responsibilities (backend-heavy) - End-to-end delivery: requirement Gathering design estimate implement test deploy observe iterate. - Backend (primary Node.js/TS/NestJS): - Design and deliver REST APIs; enforce OAuth/JWT auth, RBAC, and rate limiting. - Build high-throughput services with caching (Redis), message queues/streams (RabbitMQ/Kafka), and webhooks. - Engineer resilient, observable microservices (retries, idempotency, circuit breakers, backpressure). - Data: - Schema design & migrations (PostgreSQL/MySQL/MongoDB); indexing, query tuning, partitioning. - Thoughtful use of Redis for caching, locks, and ephemeral data. - Frontend (supporting React/TS): - Implement and maintain accessible, responsive UIs; routing/forms; pragmatic state mgmt (React Query/Zustand/Redux). - CI/CD: - Build test scan SonarQube quality gate deploy (blue/green/canary) with automated rollbacks. - Security & quality: - SAST/DAST, dependency health, OWASP practices, meaningful code reviews, secret hygiene. - Observability: - Logs/metrics/traces (Sentry, Grafana/Prometheus), actionable alerts & SLOs. - Scaling & optimization: - Improve throughput/latency/memory, tune Node event loop, connection pooling; SSR/Next.js perf where relevant; capacity planning & cost control. - AI-first workflow: - Use Cursor/Copilot/LLM reviewers for coding, tests, and PR feedback with prompt hygiene, determinism, and secret safety. Working Hours & Collaboration - Maintain 45 hours daily overlap with the US team, typically 2:0011:00 PM IST (MonFri). - Participate in sprint rituals, design reviews, incident/launch windows during the overlap. Minimum Qualifications - 510 years building & shipping production systems with Node.js (TypeScript) and NestJS; strong React (TypeScript) proficiency. - Proven scaling & optimization achievements: DB/query tuning, effective caching/CDN, queueing/streaming, horizontal scaling, Core Web Vitals awareness for user-facing flows. - Hands-on with Docker, CI/CD (GitHub/GitLab Actions), and a major cloud (AWS/GCP/Azure). - Solid SonarQube experience (quality profiles, coverage gates, security hotspots). - Testing depth: Jest/Vitest, React Testing Library, Playwright/Cypress; testcontainers for integration tests. - Excellent ownership, documentation, and cross-functional collaboration. Nice to Have - Fastify, Next.js, GraphQL, WebSockets/event-driven designs. - IaC (Terraform/CDK), GitOps/ArgoCD, feature flags, experimentation (Mixpanel). - Node profiling (clinic.js), cost/perf tuning, accessibility (WCAG). CI/CD & Quality (Expectations) - Branching: trunk-based or GitFlow with protected main; mandatory PR checks. - Pipelines include: type-check, lint, unit integration e2e tests, SonarQube scan, SCA (Dependabot/Snyk), Docker build, deploy, smoke checks, auto-rollback hooks. - Quality bar: - Test coverage 80% overall ( 90% on core paths). - 0 blocker issues in SonarQube; no new critical vulnerabilities/smells. - Frontend preview builds meet perf budgets (LCP/TTFB/CLS). Definition of Done - CI green (type-check, lint, tests); SonarQube gate passed. - Telemetry & alerts configured; runbook/README updated; ADR/OpenAPI updated as needed. - Feature flags set for safe rollout; migrations and rollback notes included. 30/60/90 Success Plan - 15 days: Local env ready; ship a small backend-led feature behind a flag; SonarQube green; dashboards wired. - 45 days: Lead a medium backend feature; improve a pipeline step (caching/parallelism); add alert + runbook. - 60 days: Own a service/domain; propose an ADR; measurably raise reliability/perf for a critical path.