Open to opportunities

Navjot Singh

@navjotsingh4

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Backend-leaning Full-Stack Software Engineer building secure, scalable HR SaaS.

India

Message

What I'm looking for

I’m looking for a team where I can build secure, scalable SaaS with strong ownership—designing microservices, optimizing data and performance, and improving reliability. I want engineering culture that values system design, mentoring, and measurable uptime.

I’m a backend-leaning Full-Stack Software Engineer with 4+ years of experience building scalable, secure, and high-performance SaaS applications. I focus on system design, REST API development, distributed systems, and database optimization—backed by measurable uptime and performance improvements.

At ClayHR (HR SaaS Platform), I led end-to-end design and development of enterprise-grade multi-tenant modules supporting 10,000+ active users while ensuring 99.9% uptime. I architected Spring Boot microservices with OAuth2/JWT authentication, improved API response time by 25% through PostgreSQL query optimization, and introduced Redis caching to reduce database load by 40%.

I also build for reliability and security: I implemented OWASP Top 10 compliant fixes from critical VAPT findings and engineered loosely coupled event-driven microservices using Apache Kafka for fault isolation and horizontal scalability. I’ve mentored junior engineers, strengthened CI/CD with Jenkins + Docker + Kubernetes, and delivered features with zero critical post-release defects across multiple sprints.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Developer

Current

BizMerlinHR

Jun 2025 - Present (1 year)

Led end-to-end design of multi-tenant HR SaaS modules for 10,000+ users, ensuring 99.9% uptime across distributed production. Architected Spring Boot microservices with OAuth2/JWT, improving API response time 25% for 500+ concurrent requests through PostgreSQL optimization and indexing, and reducing database load 40% using Redis caching.

Java Spring Boot Microservices Architecture OAUTH2 Redis Apache Kafka AWS Docker Kubernetes

Software Developer

BizMerlinHR

Apr 2023 - May 2025 (2 years 1 month)

Developed full-stack features for a multi-tenant HR SaaS platform serving 50+ enterprise clients, delivering Expense, Roster, and Project modules with RBAC and configurable workflow automation. Built high-throughput REST APIs (300+ concurrent requests), reducing p95 latency 20%, and automated NFRA validation workflows to cut booking errors 30%.

Java Angular React REST APIs Role Based Access Control (RBAC)Workflow Automation AWS EC2 PostgreSQL Performance Tuning

Software Developer

E-Soft Communications Pvt. Ltd.

Jul 2022 - Apr 2023 (9 months)

Contributed to early ClayHR modules, building reusable Spring Boot and Angular components that reduced new feature development time by 15%. Performed PostgreSQL/MySQL migrations and SQL optimization (up to 35% faster) and implemented JUnit/Mockito tests with 80%+ coverage while reducing production issue resolution time by 25%.

Java Spring Boot Angular SQL Query Optimization PostgreSQL MySQL Junit Mockito Integration Testing

Software Developer Intern

E-Soft Communications Pvt. Ltd.

Jan 2022 - Jul 2022 (6 months)

Built REST APIs and Angular frontend components for enterprise HR features, contributing to 3 production modules within the first 3 months. Participated in testing, debugging, and agile sprint ceremonies to support the full software development lifecycle in a production-grade environment.

REST API Development Angular Frontend Development Testing Debugging Agile Sprint Participation Production Support