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Achievements

Achievement: Pull Sharkx4Achievement: Pair Extraordinairex4Achievement: QuickdrawAchievement: YOLO

Achievements

Achievement: Pull Sharkx4Achievement: Pair Extraordinairex4Achievement: QuickdrawAchievement: YOLO

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sumit22/README.md
Sumit Kumar, application architect for SaaS and fintech

I design systems that move money and keep an exact record of it. 14+ years in software engineering, 9 of them in architect and lead roles across banking, payments, cards and crypto. Based in Bengaluru.

Portfolio LinkedIn Medium Stack Overflow

Open to Application / Solution Architect and Lead Engineer roles in fintech or SaaS.

// changelog

2025 – now   SutraOS           Founder & Principal Engineer   multi-tenant SaaS, AI video
2024 – 2025  BlackLine         Senior Software Engineer       pipeline onto AWS SQS
2023 – 2024  Open Financial    Lead Software Engineer         20–50x faster APIs, HDFC Bank
2020 – 2022  Spenmo (YC S20)   Lead Architect                 payins, payouts, card issuing
2017 – 2020  Unocoin           Web Architect                  PHP → Laravel, team of 7
2010 – 2017  HolidayIQ & co.   Engineer                       search, ranking, growth

// open source

Project What it is
sendrail
TypeScript · AWS SES		 Email deliverability on your own AWS SES account: sending, delivery feedback, suppression and reputation. The layer you'd otherwise rent from an email provider. Express and NestJS adapters.
FindMyStar
Rust · React Native		 Offline AR finder for ~620 stars, planets and Messier objects. Positions computed in Rust against VSOP87/Hipparcos and validated against USNO and JPL Horizons. No network calls.
time-travel-carousel
TypeScript · React		 A React carousel where every slide has a version history: left/right between items, up/down through revisions. Zero runtime dependencies.

// writing

32 minutes to 2 minutes: rewriting a Symfony integration suite in one PR: 684 tests became 881, the run dropped from ~32 min to 2 min 10 s, and three production bugs surfaced along the way.

// stack

Area Tools
Languages PHP, TypeScript, JavaScript, Go, Java
Backend Laravel, Symfony, NestJS, Node.js
Frontend React, Next.js
Data PostgreSQL, MySQL, Redis, MongoDB
Cloud & DevOps AWS, Docker, GitHub Actions, Linux

Practice: domain-driven design · event-driven architecture · multi-tenant SaaS · legacy modernisation · PCI DSS (SAQ-A) · GDPR · RBI compliance

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  1. sendrail sendrail Public

    Email deliverability on your own AWS SES account — sending, delivery feedback, suppression and reputation. The layer you would otherwise rent from an ESP.

    TypeScript

  2. time-travel-carousel time-travel-carousel Public

    A React carousel where every slide has a version history. Images, video and PDFs; left/right between items, up/down through their revisions. Zero runtime dependencies, stylable from plain CSS.

    TypeScript

  3. 32 minutes to 2 minutes: rewriting a... 32 minutes to 2 minutes: rewriting a Symfony integration suite in one PR
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    From 32 minutes to 2 minutes: rewriting a Symfony integration suite in one PR
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    > **TL;DR** — A 684-test integration suite that ran in ~32 minutes, choked on application-seeder coupling and a stack of brittle assertions against fixture-generated magic numbers. One PR later: 881 tests, 2 minutes 10 seconds, no application-seeder dependency, three previously-undetected production bugs flagged along the way. Here's how — false starts included.
    
              
    
              
    
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          FindMyStar  FindMyStar          Public
        
    
      
    


      
    
        Precision Offline Celestial Object Finder with Smart Visibility Alerts
      
    

      
    
          
  
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          sumit22.github.io  sumit22.github.io          Public
        
    
      
    


      
    
        Portfolio site: sumit22.github.io
      
    

      
    
          
  
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