Headline

Backend Engineer · Python · Node.js · FastAPI · Kafka · PostgreSQL · GCP | Building distributed systems that scale

About

I build backend systems - APIs, distributed pipelines, and the infrastructure that keeps products running at scale. Most recently: founding backend engineer at an AI startup, where I built the entire Python/FastAPI backend for a VS Code coding-assistant from zero to closed beta in 4 months. That meant OAuth integrations across GitHub/GitLab/Bitbucket, encrypted token storage, ML engine orchestration, Stripe billing, and GCP Cloud Run deployment - solo. Before that, 3 years at Tech Mahindra on a logistics platform handling ~100K daily transactions: - Reduced API latency by ~30% through query profiling and database indexing - Designed and built a fault-tolerant payment pipeline using Kafka, AWS SQS/DLQ, and Redis (idempotency, rate limiting, transient state) - cut operational errors by 37% - Improved SLA adherence from 87% to 95% - Cut Docker build times by 35% via Dockerfile layer restructuring. I also built PulseQueue - a distributed webhook delivery system with Kafka, async workers, exponential backoff, DLQ routing, Redis pub/sub, WebSockets, and Prometheus/Grafana observability across an 8-service Docker Compose stack. Built it to go deep on distributed systems fundamentals. What I'm good at: → Python (FastAPI) and Node.js backend systems → PostgreSQL, MongoDB, Redis, Kafka → AWS and GCP Cloud Run deployments → Building things that actually ship Open to: Backend Engineer / SDE / SDE 2 roles at product-first companies. GitHub: github.com/Robin-singh24

Location

Bengaluru

AI stack

claude code

cursor

hugging face

langchain

ollama

replit

Work experience

Full Stack Developer at Bajaj Finance, Sep 2026 - Present · 1 mo, Bangalore

Backend Engineer at Code Gauge, Dec 2025 - Apr 2026 · 4 mo, Remote, Built the entire Python/FastAPI backend for an AI coding-assistant VS Code extension, from zero to closed beta in 4 months. Designed the data layer: PostgreSQL for user, auth, and billing data; MongoDB for repo content and chunked code; deployed on GCP Cloud Run. Built OAuth 2.0 integrations for GitHub, GitLab, and Bitbucket to fetch private repos, with encrypted token storage and weekly token refresh handling. Wrapped 3 ML engines into FastAPI services and orchestrated end-to-end request flow between repo ingestion, embedding generation, and the VS Code client. Cut Cloud Run cold-start by ~40% via Docker image slimming and lazy dependency loading; load-tested ingestion pipeline with k6 against 2K GitHub profiles. Built Stripe subscription backend with webhook-driven plan activation, plus the full auth system: JWT sessions, signup/signin flows, and RBAC.

Software Engineer at Tech Mahindra, Jan 2023 - Dec 2025 · 3 yrs, Bengaluru, Reduced API latency by ~30% on a logistics platform handling ~100K daily transactions by identifying slow queries and overhauling database indexing strategy. Diagnosed and fixed a race condition in the Order & Shipment service where concurrent requests caused duplicate processing via non-atomic read-modify-write flows; resolved with DB-level transactions. Designed and built a fault-tolerant payment pipeline using Kafka, AWS SQS/DLQ, and Redis for rate limiting, idempotency, and transient state — reducing operational errors by 37%. Improved SLA adherence from 87% to 95% by monitoring API bottlenecks via CloudWatch and driving targeted backend fixes across the team. Cut Docker build times by 35% by restructuring Dockerfiles to separate dependency installation from source layers, enabling aggressive layer caching. Implemented JWT-based auth with token rotation and OAuth 2.0; wrote and contributed to Jest unit and integration tests across multiple service modules.

Education

Bachelor of Technology - BTech, Computer Science, ITM Group of Institutions

Public links

github: https://github.com/Robin-singh24

leetcode: https://leetcode.com/thenoobcoder_PP