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Sana Kulkarni

Senior Full-Stack Developer

Pune, India • +91 99201 73344 • sana.kulkarni@hey.com • linkedin.com/in/sana-kulkarni • github.com/sanak

Portfolio: www.eliorexa.com/portfolio/full-stack-developer-mid

Professional Summary

Full-stack developer with 5 years building and scaling React/Next.js + Node.js products in fintech and B2B SaaS. Owns features end to end — from PostgreSQL schema to typed API to accessible UI — and has a track record of measurable wins in performance, reliability and developer velocity. Mentors junior engineers and sets the bar on code review and CI/CD.

Skills

Frontend: React, Next.js, TypeScript, Redux Toolkit, React Query, Tailwind CSS

Backend: Node.js, NestJS, REST, GraphQL, PostgreSQL, Prisma, Redis, Kafka

Cloud & DevOps: AWS (ECS, RDS, S3, Lambda), Docker, Terraform, GitHub Actions, Datadog

Practices: TDD, CI/CD, System design, Code review, Agile/Scrum

Core Competencies

JavaScript · TypeScript · React · Next.js · Node.js · REST · GraphQL · PostgreSQL · Git · CI/CD · AWS · system design · mentoring

Work Experience

Full-Stack Developer — Finhabit (Series B fintech)

Jul 2022 – Present

Pune

  • Own the payments dashboard (Next.js + Node/PostgreSQL) used by 120k monthly active users; led a re-architecture that cut p95 page load 38% (2.4s → 1.5s).
  • Migrated 9 REST endpoints to GraphQL with persisted queries, reducing over-fetching and dropping mobile payload 41%.
  • Introduced a GitHub Actions CI/CD pipeline with preview deploys and automated tests, cutting release time from ~2 hours to 12 minutes.
  • Mentored 3 junior engineers and instituted a code-review checklist that reduced post-release defects 27% quarter over quarter.

Software Engineer — BrightLedger

Jun 2020 – Jun 2022

Remote

  • Shipped a customer onboarding flow in React/TypeScript that lifted activation 19% through inline validation and progressive disclosure.
  • Built a Node.js reconciliation service processing 2M+ transactions/day, backed by PostgreSQL partitioning and Redis queues.
  • Cut AWS spend ~₹6.2L/year by right-sizing ECS tasks and adding S3 lifecycle policies.

Projects

Velvet — open-source design tokens — 4 products

A TypeScript token pipeline adopted internally across 4 products.

  • Authored a token-to-CSS-variables generator with theming; reduced design-to-dev handoff time ~35%.

Tech: TypeScript, Design systems, CI/CD

Interactive 3D Portfolio

WebGL portfolio built on Eliorexa, linked from this résumé.

  • Reactive three.js hero, scroll-driven sections, lazy-loaded and reduced-motion safe — LCP 1.1s, CLS 0.02 on mobile.

Tech: three.js, React, Performance

Education

B.Tech Information Technology

2020

College of Engineering Pune (COEP), Pune

First Class with Distinction

Certifications

  • AWS Certified Developer – Associate — Amazon Web Services (2023)