Achintya Sarkar

Software Development Engineer

Verified

About

Software Development Engineer with 5+ years of experience designing and shipping scalable backend systems and customer-facing products at Amazon, BBC News, Gaana, and UnitedHealth Group.

Built high-impact platforms in Java/Spring Boot and AWS
Integrated ML-driven recommendation systems
Owned features end-to-end from design to production
Strong in distributed systems, microservices, REST APIs, and full-stack development

Currently pursuing MS in Computer Science at Georgia Tech.

Skills

Java Python TypeScriptJavaScriptSQLSpring BootSpring MVC

Experience

Founder & Software Engineer at Self-Employed
Jan 2026 — Present
- Architecting and building a full-stack gym discovery platform offering single-day entry passes for local gyms based on events and casual workout slots.
- Designing backend services in Java/Spring Boot on AWS with a React frontend; implementing payment integration, geolocation-based search, and review aggregation.
- Owning product strategy, system design, deployment, and go-to-market execution end-to-end.
Software Development Engineer at Amazon
Sep 2022 — Jan 2026
- Built and scaled the Diamonds loyalty reward platform in Java/Spring Boot on AWS, serving millions of customers across Amazon India and Mexico.
- Drove a ₹120 increase in average order value in India and enabled deeper customer discounts, contributing to retention and repeat-purchase metrics.
- Integrated a Next Best Action (NBA) ML-powered recommendation engine into the retail page, increasing suggestion clicks by 12% and engagement by 17%.
- Designed event-driven post-order processing pipelines using Python and AWS (Lambda, SQS, DynamoDB) to handle high-throughput reward issuance and reconciliation.
- Led design reviews, mentored junior engineers, and partnered with product and data science teams to define roadmaps and technical requirements.
- Ensured production reliability via on-call rotations, CloudWatch monitoring, and automated alerting.
Software Engineer — Visual Journalism Team at BBC News
Feb 2022 — Sep 2022
- Developed reusable, accessible, and interactive UI components in TypeScript for BBC News websites serving a global audience across 40+ languages.
- Reduced development time for new stories by standardizing component libraries used across the Visual Journalism team.
- Built and maintained Node.js backend services with Handlebars templating, deployed on AWS with code-based deployment pipelines.
- Collaborated with journalists and designers to translate editorial concepts into performant, WCAG-compliant web experiences.
Software Developer at Gaana.com
Jul 2021 — Feb 2022
- Built and maintained Jukebox, a 24x7 offline-capable enterprise music player serving 13,000+ commercial clients including Levi's, Chaayos, and Mochi.
- Engineered offline music caching, license management, and remote playlist sync to ensure uninterrupted playback in low-connectivity retail environments.
- Optimized application performance and resource usage for long-running kiosk deployments.
Software Engineer Associate at UnitedHealth Group (Optum)
Jun 2020 — Jul 2021
- Designed and delivered a server decommissioning automation system using a Java/Spring Boot backend and Angular frontend, adopted across UHG infrastructure.
- Automated validation workflows and infrastructure cleanup, removing unused servers at scale and reducing manual operations overhead.
- Collaborated with infrastructure and security teams to define validation rules and integrate with internal CMDB systems.

About

Skills

Experience

Projects