Open to opportunities

Sumit Kumar

@sumitkumar31

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Flutter developer building AI-native mobile apps with RAG and real-time systems.

India

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What I'm looking for

I’m looking to build AI-native Flutter apps end-to-end—RAG, fast LLM integrations, and reliable real-time systems. I want teams that value measurable impact, strong engineering practices, and scalable architecture.

I’m a Flutter developer specializing in AI-native mobile applications, where I turn LLM capabilities into useful, fast, and reliable product features. I’ve shipped end-to-end mobile apps with measurable impact, from semantic search to real-time multilingual chat.

At Grocery On Wheels, I revamped Flutter inventory screens and improved browsing smoothness by stabilizing frame rate from 45 to 60 FPS. I also boosted cold startup by 80% using lazy loading, Dart isolates, and intelligent caching, while integrating REST APIs with JWT auth and Hive offline caching to achieve zero data-loss incidents.

In my internship at SCM Software Labs, I architected Spring Boot REST APIs with JWT + OAuth2 across a 3-role RBAC system serving 10K+ users. I’ve built event-driven messaging with 98% delivery reliability, reduced server load by 40%, and improved startup time by 80% through async processing and query optimization—then supported full CI/CD using Docker and GitHub Actions.

Experience

Work history, roles, and key accomplishments

Flutter Developer Intern

Grocery On Wheels

Oct 2025 - Mar 2026 (5 months)

Revamped Flutter inventory screens, improving frame rate from 45 to 60 FPS and boosting cold startup by 80% through lazy loading, Dart isolates, and intelligent caching. Integrated REST APIs with JWT auth and Hive offline caching, resolved intermittent payment gateway failures, and managed the full App Store release cycle.

Flutter Dart PostgreSQL REST APIs JWT Hive Offline Caching Lazy Loading Dart Isolates Intelligent Caching Payment Gateway Debugging App Store Deployment Performance Optimization

SDE Intern — Flutter & Backend

SCM Software Labs

May 2025 - Aug 2025 (3 months)

Architected Spring Boot REST APIs with JWT and OAuth2 across a 3-role RBAC system, serving 10K+ users with zero auth breaches. Owned an end-to-end Flutter client with live GPS tracking, built event-driven messaging for 98% delivery reliability, and optimized backend load and startup time.

Flutter Dart Spring Boot PostgreSQL Redis Docker AWS EC2 GitHub Actions JWT OAUTH2 REST APIs CI CD Batched Calls

Education

Degrees, certifications, and relevant coursework

National Institute of Technology, Hamirpur

Dual Degree (B.Tech + M.Tech), Computer Science and Engineering

2022 -

Grade: CGPA: 8.33/10

Activities and societies: Relevant coursework: DSA, Operating Systems, Computer Networks, DBMS.

Pursuing a dual degree (B.Tech + M.Tech) in Computer Science and Engineering at NIT Hamirpur (2022–2027 expected), with a CGPA of 8.33/10. Coursework includes DSA, Operating Systems, Computer Networks, and DBMS.