Punnayan Saha

Backend Engineer

Bengaluru, Karnataka, India10 mos experience

Key Highlights

Scaled APIs for 1M+ daily requests
Improved job success rate by 40-50%
Decomposed monolith into microservices

Stackforce AI infers this person is a Backend Engineer specializing in SaaS and Distributed Systems.

Contact

Skills

Core Skills

MicroservicesDistributed SystemsBack-end Web Development

Other Skills

AlgorithmsBullMQRedisPlaywrightTemporalSQSPostgreSQLOptimizing PerformanceNode.jsFastAPIKafkaEvent Driven ProgrammingGo (Programming Language)NestElasticsearch

About

Architected a subscription microservice supporting 7M+ integrations, built distributed workflows, and scaled APIs to 1M+ daily requests — I take backend systems from 0→1 to scale. I take high ownership across design → implementation → scale. I’ve decomposed tightly coupled systems into independent microservices, reducing failure blast radius and accelerating feature delivery, enabling faster customer onboarding and improved production stability. My work has supported systems used by 400+ enterprise customers and helped convert pilots into paid B2B revenue by improving reliability and automation success. Comfortable operating in small teams and ambiguity — shipping MVP features quickly, then evolving architecture to support growth. I focus on async workflows, queue-driven microservices, multi-tenant SaaS design, and high-throughput APIs built with observability and failure recovery from day one. 🚀 Highlights • Scaled APIs for 1M+ daily requests (800ms → 300ms latency) • Improved job success rate 40–50% via distributed coordination & recovery • Decomposed monolith into microservices to improve velocity & isolation • Reduced MTTR by 30% with observability improvements • Systems used by 400+ enterprise customers • OSS tools adopted by 170+ developers 💡 Tech: Node.js, Go, Python, PostgreSQL, Redis, Docker, AWS, BullMQ, Distributed Systems

Experience

10 mos

Total Experience

10 mos

Average Tenure

10 mos

Current Experience

Josys

Software Developer ( Backend )

Jul 2025 – Present · 10 mos · Bangalore Urban, Karnataka, India · Hybrid

Designed and built an RPA orchestration backend to manage browser-based automation workflows with isolated execution, lifecycle tracking, and recovery handling.
Implemented per-session isolated worker architecture using BullMQ, Redis, and Playwright, enabling parallel RPA execution without cross-session interference.
Eliminated worker startup race conditions via idempotent queue initialization and promise-based creation locks, improving stability under concurrent workflow launches.
Engineered crash recovery and session rehydration to safely resume workflows after failures, improving completion reliability.
Built queue lifecycle controls (pause/resume, retries, stalled detection, lock tuning), reducing MTTR by 30% and improving throughput.
Drove RPA beta adoption through customer walkthroughs and hotfix-driven iterations, helping convert pilots into 2 paid B2B deals (₹30L+ contract value).
Owned SaaS integration enablement by shifting from batch processing to per-application ownership across 300+ SaaS apps used by 400+ organizations.
Owned and architected a subscription-based license optimization microservice supporting 5M+ integrations; introduced dynamic underutilization detection to emit actionable events for idle licenses and improve utilization insights.
Owned and architected an IT-admin controlled retry framework leveraging Temporal for durable re-execution, improving error diagnostics and reducing workflow failures by 40%.
Architected a multi-tenant batch reporting system using Temporal scheduled workflows, Redis, and SQS with per-tenant scheduling and idempotent notification delivery.

Back-End Web DevelopmentAlgorithmsMicroservicesDistributed Systems

Care insurance

Software Developer Intern

Jan 2025 – Jul 2025 · 6 mos · Gurugram, Haryana, India · On-site

Accelerated premium computation API by 37.5% → 1M+ daily API calls
Improved Quick Renewal reliability by migrating PHP → Node.js
Enhanced backend lead enrichment & claim workflows → fewer incidents & smoother releases

PostgreSQLOptimizing PerformanceBack-End Web Development