Open to opportunities

Vansh Kumar Singh

@vanshkumarsingh

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Software Development Engineer focused on backend systems, real-time apps, and reliable distributed workflows.

India

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What I'm looking for

I’m looking for a role where I can build backend & real-time systems, design robust workflows, and work with distributed services—owning reliability, data integrity, and performance end to end.

I’m a Software Development Engineer building dependable backend systems and user-facing workflows. At Rootstock, I’ve architected async processing for customer refunds and designed resilient matching and failure-handling so AR/AP stays consistent even when stages fail.

I also built Bank Reconciliation that matches daily bank statement lines to AR, AP, and GL using a multi-strategy auto-match engine, plus extensions for vendor direct debits via IBAN API lookup and open AR deposits by invoice number. I’ve shipped data pipelines with savepoint-backed rollback and chunked imports to stay within platform limits.

Previously, I interned at Accenture, building a React + Cloudflare Workers blogging platform with Zod validation, JWT auth, and query optimization with Prisma. I also developed a MERN peer-to-peer wallet payment system with atomicity protections, and I enjoy taking ideas into real projects like Excalidraw real-time collaboration, Kafka-driven workflow automation, and an event-driven crypto matching engine.

Experience

Work history, roles, and key accomplishments

Current

Software Development Engineer

Current

Rootstock

Jun 2024 - Present (1 year 11 months)

Built Customer Refund Workbench, including a 5-stage async debit→AP→apply→pay chain with savepoints/rollbacks to keep AR/AP consistent on failures. Implemented atomic deactivation across 3 records, a 4-strategy bank reconciliation matcher, and a 5MB CSV import pipeline with chunked writes and rollback support.

AR AP GL Accounting Savepoints And Rollbacks Bank Reconciliation CSV Import Pipelines PostgreSQL Redis Distributed Systems

Software Development Intern

Accenture

Jun 2023 - Jul 2023 (1 month)

Built a blogging platform using React and Cloudflare Workers, optimizing HTTP request handling for low latency. Implemented Zod-based JSON schema validation and secure signed JWT authentication with cookies, and improved slow PostgreSQL queries using Prisma ORM and connection pooling.

React Cloudflare Workers Zod JWT Prisma PostgreSQL Cookies Based Sessions TypeScript REST APIs

Software Development Intern

Avioliitto Enterprises

May 2022 - Jul 2022 (2 months)

Developed a peer-to-peer wallet payment system on the MERN stack with JWT + cookies, ensuring atomic transactions to prevent double spending and concurrency issues. Added transaction notifications and a React UI for seamless transfers and clear record-keeping.

MERN Stack JWT Cookies Transaction Atomicity Concurrency REST APIs Web Security Notifications