Open to senior backend roles

Shashank
Singh

Backend Engineer · 4+ years · Fintech & Healthcare

I architect and scale backend systems that process real money and real medical data. My work runs at the intersection of high reliability, financial integrity, and the kind of engineering decisions that age well under production pressure.

10K+
daily transactions
handled
₹10M+
monthly volume
processed
200+
vendor systems
integrated
80%
manual effort
eliminated
11→3
days to onboard
enterprise clients

About

Background

I'm a backend engineer with a mathematics background from IIT Kgp, where I developed the instinct for systems thinking that has defined how I approach engineering. Over four years I've built distributed microservices, financial reconciliation engines, and ML-backed data pipelines for companies operating in high-stakes, regulated environments.

I care about correctness first — in financial systems, a bug that loses ₹1 is as serious as one that loses ₹1M. I bring that standard of rigour to API design, schema decisions, and the unglamorous work of idempotency, retry logic, and observability.

Skills

Technical stack

Languages Python, JavaScript / Node.js, SQL
Frameworks Django, Django REST Framework, FastAPI, Express
Databases PostgreSQL, MongoDB, MySQL, Redis, ClickHouse
Cloud & Infra AWS (EC2, S3, Lambda, RDS, API Gateway), CI/CD, Linux
Architecture Microservices, distributed systems, REST API design, system design
AI / ML LangChain, Pinecone, RAG pipelines, vector similarity search

Experience

Where I've worked

VoloHealth
Nov 2023 – Present
Mumbai
Backend Engineer

Healthcare fintech — lending infrastructure, insurance data, and enterprise integrations at scale.

  • Built and scaled a microservices backend (Node.js, MongoDB, PostgreSQL, AWS) processing 10K+ daily transactions and ₹10M+ monthly loan volume.
  • Engineered a credit-score-based lender routing system with configurable risk rules, reducing loan approval turnaround and improving lender utilisation.
  • Designed APIs with idempotency guarantees and distributed transaction controls to ensure financial data integrity across loan origination and EMI workflows.
  • Built a Python email-ingestion pipeline processing 500+ insurance documents daily — cutting manual processing by 80%, saving 15 engineer-hours per week.
  • Integrated 200+ vendor systems into a healthcare credit card platform, engineering reconciliation and deduplication layers to eliminate financial discrepancies.
  • Redesigned enterprise onboarding as an API-driven configuration workflow, reducing integration time from 14 days to 3.
Node.jsPythonPostgreSQL MongoDBAWSMicroservices
Siloho
May 2022 – Jun 2023
Panaji, Goa
Backend Engineer — Python / Django

Interior design marketplace — transaction processing, performance engineering, and recommendation systems.

  • Diagnosed and rewrote critical SQL queries and PostgreSQL index strategies, reducing p95 API latency from 2.5s to 1.5s across a 10K+ daily-transaction workload.
  • Delivered Django-based transaction processing modules for $50K+ daily volume with strict reconciliation and audit guarantees.
  • Introduced Redis caching for hot-path queries, materially improving throughput under concurrent load.
  • Built a rule-based recommendation engine for 1,000+ users that lifted design-selection conversion rate by 35%.
DjangoDRFPostgreSQL RedisPython

Projects

Selected work

Insurance Document Intelligence — RAG Chatbot

A retrieval-augmented generation system that makes insurance policy documents queryable in natural language. Built ingestion pipelines to chunk, embed, and index policy documents into Pinecone; implemented vector similarity retrieval paired with LLM response generation to surface accurate, clause-level answers from large unstructured document sets. Designed to be extensible across document types and policy providers.

PythonLangChainPinecone AWSRAGVector DB

Education

Academic background

2014 – 2019
IIT
Integrated M.Tech. — Mathematics & Computing

Contact

Get in touch

Open to senior backend engineering roles, staff-level positions, and interesting consulting work.