Open to opportunities

Subhojeet Saha

@subhojeetsaha

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Tech Lead specializing in large-scale TypeScript/Node systems for payments, ecommerce, and SaaS.

Zimbabwe

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What I'm looking for

I’m looking to lead teams building resilient payment and real-time systems—owning architecture, performance, and reliability—while mentoring engineers through TDD and strong observability to ship with zero downtime.

I’m a Senior Software Engineer and Tech Lead with 6.5 years building large-scale TypeScript/Node systems across payments, ecommerce, and SaaS. At CircleChess, I built multi-gateway payments with double-entry internal ledgering, automated reconciliation, and idempotent processing—delivering zero discrepancies and zero financial loss since launch while cutting cloud costs by 30%.

I’ve led engineering execution end-to-end: scaling platforms to 10,000+ concurrent real-time connections with sub-50ms p99 latency, shipping a React Native mobile app from zero to production in 12 weeks, and delivering new revenue streams like a coaching marketplace. Previously at GoGuardian and Wakefit, I drove measurable reliability, performance, and experimentation outcomes—cutting MTTR by 50%, reducing production bugs by 70%, and improving checkout conversion by 25%—with strong test discipline, observability, and mentoring (7 direct reports; 3 promotions).

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

CircleChess

Oct 2024 - Present (1 year 8 months)

Built a multi-gateway payments platform (Stripe, PayPal, Juspay) with double-entry internal ledgering, achieving zero discrepancies across 50+ weekly real-money tournaments. Led a 7-engineer team while shipping a real-time engine supporting 10,000+ concurrent connections (p99 < 50ms) and reducing cloud costs by 30%.

TypeScript Stripe PayPal Juspay Ledgering PostgreSQL AWS ECS React Native

Senior Software Engineer

GoGuardian

Feb 2023 - Sep 2024 (1 year 7 months)

As on-call lead, cut incident MTTR by 50% by building the observability stack (CloudWatch, Sentry, PagerDuty) and authoring runbooks for top failure modes. Reduced production bugs by 70% with a PR-blocking test architecture (Jest, Cypress, React Testing Library) with 90% coverage gates and improved page loads by 40%.

React TypeScript Jest Cypress React Testing Library Cloudwatch Sentry PagerDuty CI CD Performance Engineering

Software Engineer

Wakefit

Dec 2020 - Jan 2023 (2 years 1 month)

Achieved sub-200ms p99 under 10x flash-sale load by optimizing PostgreSQL queries and adding Redis read-through caching, maintaining zero data-integrity incidents across 12 sale events. Increased checkout conversion by 25% with a server-side A/B testing framework and rebuilt the storefront with Next.js SSR/ISR to grow organic traffic by 35%.

React Next.js A B Testing PostgreSQL Redis Server Side Rendering Performance Optimization

Software Development Engineer

MountBlue Technologies

Aug 2019 - Nov 2020 (1 year 3 months)

Designed and implemented authentication and RBAC from scratch using OAuth2/JWT, securing 200+ users across 3 product lines and reducing unauthorized access to zero. Built React + Node.js real-time BI dashboards replacing 8 hours/week of manual Excel reporting and integrated third-party logistics APIs to cut support tickets by 50% (~120/week).