Vishal Kumar Ramteke

Full Stack Engineer with 5+ years owning features end-to-end — schema design → OpenAPI-first REST APIs → React.js/Next.js UI → tested, production-deployed code. Strong command of TypeScript strict mode, Zod validation, TDD (tests written before implementation), and multi-DB systems (MongoDB, PostgreSQL, MySQL, Redis). Hands-on production experience integrating LLM APIs (OpenAI, Claude) with structured JSON outputs, streaming token-by-token rendering, RAG pipelines (LangChain + pgvector/Pinecone), prompt versioning, and graceful LLM failure handling.

Experienced with BullMQ async job queues, WebSocket/Socket.io real-time systems, Redis pub/sub and TTL caching, and JWT RS256 authentication. Ships readable, tested code — challenges requirements, designs data models, and takes full ownership in remote-first environments.

Senior Software Engineer — Full Stack / Microservices at Flyweis Technology (2026-01 – Present)

• Owning features end-to-end: schema design → OpenAPI-first REST APIs with Zod validation → React.js/Next.js UI → Vitest/Playwright E2E — full feature ownership, no ticket-closing.
• Led monolith → microservices migration (Social Media, E-commerce, Support) — decomposed into domain services with bounded contexts, RabbitMQ event bus, CQRS + Transactional Outbox via MongoDB Transactions/Change Streams.
• Built real-time dashboards with WebSocket/Socket.io and streaming LLM response rendering (token-by-token) using OpenAI and Claude APIs with graceful fallback on LLM failure.
• Architected BullMQ async AI job queues — decoupling LLM inference from API response paths; implemented prompt versioning and token cost governance across all AI call sites.
• Implemented Redis pub/sub, TTL caching, and fail-closed rate limiting; deployed on AWS + Kubernetes with Traefik API gateway, zero-downtime rollouts, Prometheus metrics, and Pino structured logging with Correlation ID tracing.
• Hardened security with JWT RS256 refresh rotation (reuse detection), Helmet CSP/HSTS, opossum circuit breakers, and MongoDB TTL-based idempotency guards.
• Applying TDD-first discipline — Vitest unit tests and Playwright E2E from Gherkin scenarios written before implementation; challenging requirements and designing data models before writing a single line of code.

Chief Technology Officer at Akula Quantum Imperial Private Limited (2025-04 – 2026-02)

• Shipped production LLM integrations — OpenAI and Claude APIs with structured JSON alert classification, streamed operator summaries, RAG via LangChain + Pinecone, prompt versioning, and LLM failure fallback to rule-based alternatives.
• Built multi-DB architecture: MongoDB for flexible document storage (user profiles, events), PostgreSQL + pgvector for relational integrity and vector similarity search — each database chosen to match access patterns, not convenience.
• Designed OpenAPI-first REST APIs with Zod validation, GraphQL contracts, and OpenAPI/Swagger docs — serving 50,000+ monthly requests at 99.9% uptime for 10,000+ users.
• Led team of 5+ with strict TDD: tests written before implementation, 95%+ Jest/Playwright coverage, mandatory code reviews, and architectural guardrails — never skipped tests under deadline pressure.

SDE-1 — Backend at Riverhouse Technologies (2024-04 – 2024-12)

• Built NestJS/TypeScript microservices with Kafka, BullMQ-pattern async queues, AWS Lambda, and SQS/SNS; achieved 95% test coverage via TDD with Vitest and Playwright.
• Designed OpenAPI-first RESTful + GraphQL APIs with Zod/Joi validation, Datadog APM, and structured logging across distributed services.

Senior Frontend Developer at Simpact Online Services (2023-06 – 2024-03)

• Built real-time React.js/TypeScript dashboards with Zustand state management, WebSocket live feeds, and React Query — serving 10,000+ concurrent users; Lighthouse 58 → 91 via code splitting and lazy loading.
• Wrote Playwright E2E test suites from acceptance criteria before feature implementation — reduced production regressions by 70%.

Software Engineer Intern at Skill-Lync (2022-04 – 2023-03)

• Built full-stack MERN applications with JWT auth, OpenAPI REST APIs, MongoDB, PostgreSQL, AWS S3, and 85% Jest test coverage via TDD.

Bachelor of Engineering in Electronics & Communications – Bhilai Institute of Technology (BIT) (2013 – 2017)

Postgraduate Program in Full Stack Development – Skill-Lync (2022-02 – 2023-04)