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Full-Stack Developer · Mid-level · ~5 yrs

Sana Kulkarni

Senior Full-Stack Developer

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

120k

Monthly active users served

38%

Faster p95 page load

5

Years shipping full-stack

Skills

Frontend

ReactNext.jsTypeScriptRedux ToolkitReact QueryTailwind CSS

Backend

Node.jsNestJSRESTGraphQLPostgreSQLPrismaRedisKafka

Cloud & DevOps

AWS (ECS, RDS, S3, Lambda)DockerTerraformGitHub ActionsDatadog

Practices

TDDCI/CDSystem designCode reviewAgile/Scrum

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.

Featured projects

4 products
Velvet — open-source design tokens

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%.
TypeScriptDesign systemsCI/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.
three.jsReactPerformance

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

See the work in 3D

Explore Sana's interactive WebGL portfolio — projects, skills and a way to get in touch.

Open the 3D portfolio