Abhishek Kumar — Backend Engineer

Backend Engineer (Node.js/PostgreSQL) | Systems Thinking I solve technical problems that demand clarity, correctness, and deterministic logic. After graduating from NIT Allahabad (2024), I spent my early career at Vedanta managing ₹95 Cr capital projects. That experience in high-stakes industrial systems taught me the value of reliability and bottleneck prevention—principles I now apply to backend architecture. I build systems that startups can depend on: transaction-safe, idempotent, and resilient under failure. While I have full-stack capabilities, backend engineering is my core identity. I thrive on designing data flows, managing concurrency, and ensuring predictable outcomes for revenue-critical flows. Flagship Project: Kridha (Live B2B/B2C Marketplace) I architected and shipped a production-grade backend as the sole engineer: Scale: 61 REST API endpoints and 22 Prisma models. Consistency: Multi-seller checkout with Order → SubOrder decomposition for atomic transactions. Reliability: Idempotent Razorpay webhook processing with database-level unique constraints. Optimization: Achieved INR 0/month infra cost via a Serverless stack (Vercel + Neon + Upstash). Technical Stack: Languages: TypeScript (Strict), Node.js, JavaScript (ES6+). Databases & Cache: PostgreSQL, Redis, PostGIS (Geospatial search), Prisma ORM. Patterns & Security: REST API Design, Idempotent Webhooks, Token Family Rotation, Argon2. Tools & Testing: Docker, GitHub Actions (CI/CD), Jest, Vercel Cron, BullMQ. Current Focus: I am an immediate joiner ready to contribute to high-growth engineering teams. I am fully flexible with any timezone (Global Remote) and committed to a 6-day work week to ensure project success. Let’s discuss system design or how I built Kridha—I am always open to "talking shop" about backend reliability.

Stackforce AI infers this person is a Backend Engineer specializing in E-commerce and Serverless architectures.

Location: Gorakhpur, Uttar Pradesh, India

Experience: 6 mos

Skills

Backend Engineering
Api Design
Project Management
Systems Thinking

Career Highlights

Architected a scalable backend for a B2B/B2C marketplace.
Achieved zero-cost infrastructure using Serverless technologies.
Expert in backend reliability and systems thinking.

Work Experience

Self-Employed | Remote

Independent Backend Developer (2 mos)

Vedanta Aluminium Limited, Jharsuguda

Capex Buyer — Commercial Department (7 mos)

Education

Bachelor of Technology - BTech at Motilal Nehru National Institute of Technology (MNNIT), Allahabad

Abhishek Kumar

Backend Engineer

Gorakhpur, Uttar Pradesh, India6 mos experience

AI Enabled

Key Highlights

Architected a scalable backend for a B2B/B2C marketplace.
Achieved zero-cost infrastructure using Serverless technologies.
Expert in backend reliability and systems thinking.

Stackforce AI infers this person is a Backend Engineer specializing in E-commerce and Serverless architectures.

Contact

Skills

Core Skills

Backend EngineeringApi DesignProject ManagementSystems Thinking

Other Skills

Data ModelingREST API DesignNode.jsPostgreSQLServerlessPrisma ORMIdempotent WebhooksGeospatial searchCross-Functional Coordination (Finance, Engineering, IT, Ops)Problem SolvingTypeScriptRedisTransactions & Concurrency ControlAPI Security (JWT, bcrypt, argon2, rate-limits)Docker

About

Experience

6 mos

Total Experience

6 mos

Average Tenure

Current Experience

Self-employed | remote

Independent Backend Developer

Apr 2026 – Present · 2 mos · Gorakhpur, Uttar Pradesh, India · Remote

Architected and deployed production-grade backend systems as the sole engineer, focusing on transactional consistency and zero-cost infrastructure optimization.
Marketplace Engineering (Kridha): Built a B2B/B2C marketplace for Tier-2 India with 61 REST API endpoints and 22 Prisma models. Architected a multi-seller checkout with "Order → SubOrder" decomposition, enabling atomic buyer transactions with independent verification for multiple sellers.
Payment Reliability: Implemented a two-phase Razorpay flow with idempotent webhook processing via database-level unique constraints, eliminating duplicate processing during gateway retries.
Geospatial Optimization: Engineered radius-based product discovery using PostGIS (ST_DWithin) with GIST indexing, achieving millisecond search performance across 10k+ users without external search services.
Security & Auth: Designed an enumeration-safe authentication system featuring Token Family Rotation (detecting theft invalidates all sessions) and Argon2-encrypted PINs.
Infra Strategy: Achieved INR 0/month infrastructure cost by leveraging a Serverless stack (Vercel + Neon + Upstash Redis) while maintaining high availability.

Data ModelingREST API DesignNode.jsPostgreSQLServerlessPrisma ORM+4

Vedanta aluminium limited, jharsuguda

Capex Buyer — Commercial Department

Nov 2024 – Jun 2025 · 7 mos · Jharsuguda, Odisha, India · On-site

Managed technical procurement for INR 95 Cr capital projects. Reframed industrial workflows into deterministic systems thinking, a logic foundation now applied to backend architectural reliability.
Systems Reliability: Delivered mission-critical infrastructure, including a ₹95 Cr Pneumatic Ash Conveying automation system and ₹27.5 Cr environmental compliance project, focusing on "failure-tolerant" operational continuity.
Process Optimization: Designed deterministic RFQ and PR→PO lifecycle workflows that reduced operational friction and ensured "idempotent" approvals (consistent outcomes across multi-actor processes).
Complexity Management: Coordinated cross-functional alignment between Engineering, Finance, and IT to prevent system bottlenecks in capital-intensive asset acquisition.

Cross-Functional Coordination (Finance, Engineering, IT, Ops)Project ManagementSystems Thinking