Mukesh
Kumar.
Java Backend Engineer specializing in Spring Boot microservices, REST APIs, and distributed systems. 2 years shipping production FinTech & R&D platforms. Scroll to inspect systems.
“2 years shipping production Java & Spring Boot services — schema design, REST APIs, authorization, tests, and deploy.”
“From FinTech payment rails to GPU-accelerated simulation research — comfortable owning a feature end to end.”
“280+ problems solved on LeetCode. Currently sharpening DSA & System Design at Scaler Academy.”
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Technical
Arsenal.
Engineered by
Mukesh Kumar.
Specialized in high-throughput distributed backends, scalable relational databases, cloud infrastructure, and GPU-accelerated computing.
“Enterprise Java & Spring Boot microservices, RESTful API design, JWT/RBAC security, and resilient asynchronous event streaming with Apache Kafka.”
“Production relational modeling and indexing with PostgreSQL & MySQL, JPA query optimization, N+1 query elimination, and sub-millisecond caching via Redis.”
“Containerized deployments with Docker and AWS (EC2, S3, RDS), automated GitHub Actions CI/CD pipelines, and high-coverage test suites via JUnit 5 & Mockito.”
“High-performance compute kernels with C++ and WebGPU parallel pipelines, paired with TypeScript, React, and robust OOP & Data Structures foundations.”
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“Architecting systems that scale seamlessly.”
From securing FinTech APIs handling 10k+ monthly transactions to building WebGPU compute pipelines handling millions of mesh elements. Every metric below represents production-tested engineering depth and measurable performance impact.
All metrics · production verified · 2024 – 2025
Professional Experience
2 years of professional experience, the past 15 months building production Java and Spring Boot services — spanning FinTech payments, AR/VR platform APIs, and GPU-accelerated simulation research.
- Own Spring Boot microservices end to end, from MySQL schema design through REST contract, authorization, tests, and deployment.
- Implemented authentication and role-based authorization with Spring Security and JWT, consolidating permission checks into a single reusable module shared across services.
- Reduced response times on read-heavy endpoints by eliminating N+1 queries in JPA mappings, adding composite indexes, and caching hot lookups in Redis.
- Moved non-critical work like notifications and downstream syncs off the request path onto Apache Kafka.
- Containerize services with Docker and maintain GitHub Actions pipelines that test and deploy to AWS EC2 on merge.
- Built and secured REST endpoints across payouts, payment routing, and wallet modules of a FinTech platform processing 10K+ transactions/month, applying Spring Security RBAC across merchant, admin, and operations roles.
- Integrated a third-party payment gateway — webhook handling, idempotency keys on payout requests, and retry logic for failed callbacks.
- Built a modular Spring Boot backend with JPA/Hibernate for a school planner product serving 1,000+ users.
- Delivered 40+ REST APIs with Swagger/OpenAPI docs for an AR/VR 3D asset platform, consumed directly by Unreal Engine clients.
- Introduced Docker containerization and GitHub Actions CI/CD, replacing manual releases with an automated build, test, and deploy pipeline.
- Built a WebGPU finite element analysis prototype handling 1M-5M element meshes through custom GPU compute pipelines scaling to 10M+ threads.
- Benchmarked the solver across 6 GPU classes, reaching up to 3x speedup over the CPU baseline.
What’s in the toolkit.
Work that ships, not just compiles.
Independent builds and open-source systems — built with real data models, robust auth, streaming architectures, and high-performance graphics.
ClinicQueue
Modular monolith with tenant isolation enforced at the database layer via Postgres row-level security, a concurrency-safe token queue with live ETAs, and Kafka-driven notifications, billing, and RBAC.
Distributed CSV Pipeline
Distributed CSV ingestion and stream processing system featuring chunked streaming uploads, BullMQ background worker clusters, Redis-backed priority queues, and real-time SSE progress tracking.
HiringZone Platform
Production-grade Spring Boot backend and multi-tenant job portal powering recruitment workflows with JWT authentication, fine-grained RBAC, PostgreSQL, Redis caching, and isolated candidate/recruiter dashboards.
Life-OS
Premium AI-powered personal operating system combining intelligent scheduling, time-block execution, productivity analytics telemetry, and habit tracking algorithms.
InsightChat
Modern real-time chat platform with built-in AI conversational assistants, streaming completion, and predictive typing suggestion algorithms for enhanced team communication.
WebGPU Game of Life
High-performance cellular automata simulation engine executing custom compute shaders on WebGPU for real-time grid computation and rendering across millions of active cells.
Polygons Placement
Interactive computational geometry optimizer that calculates and renders the largest inscribed rectangle inside complex arbitrary floor plans (supporting interior holes, concave bounds, and rotation).
Job Copilot
Intelligent job application copilot utilizing LLMs for ATS resume optimization, automated specification matching, and streamlined career pipeline tracking.
Salon & Booking Engine
Scalable multi-service booking engine with provider schedule synchronization, appointment slot allocation, and transaction logs.