UI Architecture
Designs maintainable frontend systems with reusable components, state boundaries, and scalable routing patterns.
Current
Sr. Fullstack Engineer + Tech Lead — React + Java (Spring Boot)
Sr. Fullstack Engineer & Tech Lead | React · Java · Spring Boot · Microservices · REST APIs
Senior Fullstack Engineer and Tech Lead with 12+ years delivering modern React product frontends with robust Java Spring Boot backends. Combines React component architecture, state management, and Next.js with Spring Boot microservices, JPA, and enterprise-grade API design. Experienced leading fullstack teams across FinTech, SaaS, and enterprise software — ensuring React and Java systems are well-integrated, secure, and built to scale. Ajay leads React + Java delivery for teams that need strong frontend execution alongside enterprise Java backend capability. He defines API contracts between React frontends and Spring Boot services, mentors engineers on both sides of the stack, and ensures delivery stays on track across complex enterprise product environments. A Fullstack Tech Lead profile bridging React modern frontend engineering with enterprise Java Spring Boot backends, designed for senior roles in Java-ecosystem organizations.
Best fit
Sr. Fullstack Engineer, Tech Lead — React, Java, Spring Boot enterprise product teams
React
Java
Spring Boot
Tech Lead
Fullstack Engineer
Microservices
REST APIs
Enterprise
Next.js
TypeScript
React Architecture (Hooks, Redux Toolkit, React Query)
Next.js SSR & Server-Side Rendering
Java Spring Boot REST APIs & Microservices
Spring Data JPA, Hibernate & SQL Integration
Enterprise Security (OAuth2, JWT, Spring Security)
Event-Driven Systems (Kafka, RabbitMQ)
Core competencies
How this profile should be understood
Scalable Backend Systems
Builds modular services, background workflows, and integration layers that stay reliable as product and traffic complexity grow.
System Design & Architecture
Translates product and platform goals into service boundaries, deployment patterns, and maintainable technical direction.
API Design & Integrations
Defines clean contracts for frontend, backend, and third-party integrations with an emphasis on consistency and operational clarity.
Cloud & DevOps Delivery
Improves release reliability through containerized delivery, deployment automation, and production-ready cloud operating patterns.
Performance & Event Processing
Uses caching and asynchronous messaging to improve throughput, reduce latency, and isolate failures in production workflows.
Technology groups
ATS-friendly skill grouping
Frontend
React, Next.js, TypeScript, JavaScript, Redux Toolkit, React Query
Backend
Java, Spring Boot, GraphQL
Architecture
Microservices
APIs
REST APIs, GraphQL, Kafka, RabbitMQ, Redis, OAuth2
DevOps
AWS, Docker, Kubernetes, GitHub Actions
AI / Automation
Not emphasized for this profile.
Selected emphasis
Projects, keywords, and positioning
Strongest projects
Banking Payment Processing System, Enterprise SaaS Platform (Multi-Tenant), Logistics Platform, Industrial IoT Monitoring Dashboard, CI/CD & Deployment Automation
Key expertise
React Architecture (Hooks, Redux Toolkit, React Query), Next.js SSR & Server-Side Rendering, Java Spring Boot REST APIs & Microservices, Spring Data JPA, Hibernate & SQL Integration, Enterprise Security (OAuth2, JWT, Spring Security), Event-Driven Systems (Kafka, RabbitMQ), API Design & OpenAPI Specification, Database Design (PostgreSQL, MySQL), Docker, Kubernetes & AWS Cloud Deployment, Tech Lead & Engineering Team Mentoring
Profile positioning
A Fullstack Tech Lead profile bridging React modern frontend engineering with enterprise Java Spring Boot backends, designed for senior roles in Java-ecosystem organizations.