Full Stack Technical Lead - Java/React.js

We are looking for a seasoned Fullstack Tech Lead to drive the defined standard architecture, quality, and delivery of both our server-side and client-side systems across the Clients' Ecosystem.

You will own the full product stack - designing scalable backend microservices with Java and Spring Boot, and delivering polished, performant frontends with React.js and Next.js.

As a tech lead, you will mentor engineers, implement the defined technical standards across the entire stack, and partner closely with product, design, and DevOps teams to ship high-quality features end-to-end.

Key Responsibilities :

1. Leadership & Architecture :

• Implement and contribute to fullstack technical architecture decisions across backend (Java/Spring Boot) and frontend (React.js/Next.js) domains.
• Define and enforce coding standards, API design guidelines, and fullstack engineering best practices team-wide.
• Conduct thorough code reviews on both frontend and backend pull requests, fostering a culture of engineering excellence.
• Participate in sprint planning, estimation, and backlog grooming as the primary technical authority.
• Mentor junior and mid-level engineers through 1:1s, pair programming, and structured knowledge-sharing sessions.
• Collaborate with product managers, designers, and DevOps to deliver robust, high-quality features end-to-end.

2. Backend - Java - Spring Boot - Microservices :

• Contribute to Architecture decisions, develop, and maintain backend microservices and REST APIs using Java and Spring Boot. 80% of the responsibility would be to contribute to code development.
• Design event-driven and distributed systems with strong understanding of CAP theorem and eventual consistency.
• Integrate with relational databases (PostgreSQL/MySQL) and NoSQL stores (MongoDB/Redis).
• Leverage cloud-native services on AWS/GCP - Lambda, ECS/EKS, RDS, SQS/SNS.
• Evaluate and integrate message brokers (Kafka/RabbitMQ), third-party services, and cloud-native tools.
• Own incident response processes and drive root-cause analysis and post-mortems for backend systems.

3. Frontend - React.js - Next.js :

• Define and build modern, responsive web applications using React.js and Next.js (SSR/CSR, SSG, and ISR strategies).
• Lead the development of a scalable component library and maintain a consistent design system.
• Optimise frontend performance - Core Web Vitals, code splitting, lazy loading, and intelligent caching strategies.
• Integrate frontend applications seamlessly with backend APIs and third-party services.
• Champion accessibility (WCAG) and cross-browser compatibility standards across all frontend surfaces.

4. Quality, Security & Delivery :

• Drive performance optimisation, scalability improvements, and technical debt reduction across the full stack.
• Establish and enforce testing standards: unit, integration, contract, and end-to-end tests (Jest, React Testing Library, JUnit 5, Mockito, Playwright/Cypress).
• Manage and improve CI/CD pipelines (GitHub Actions/Jenkins/GitLab CI) and containerisation workflows (Docker/Kubernetes).
• Work with security and compliance teams to ensure all systems meet regulatory and data-protection requirements.

Required Qualifications :

• 8+ years of fullstack engineering experience, with at least 3 years in a tech lead or principal engineer role.
• Deep expertise in Java (Spring Boot / Spring Cloud) and microservices architecture.
• Strong proficiency in React.js - hooks, context, state management (Redux/Zustand), and performance optimisation patterns.
• Solid hands-on experience with Next.js - App Router, SSR/CSR, SSG, ISR, middleware, and API routes.
• Strong understanding of REST API design and gRPC.
• Experience with relational databases (PostgreSQL/MySQL) and NoSQL stores (MongoDB/Redis).
• Hands-on experience with cloud platforms (AWS or GCP) - Lambda, ECS/EKS, RDS, SQS/SNS.
• Proficiency in CI/CD pipelines (GitHub Actions/Jenkins/GitLab CI) and containerisation (Docker/Kubernetes).
• Strong command of distributed systems concepts - event-driven architecture, modular and loosely coupled design.
• Experience with frontend testing (Jest, React Testing Library, Playwright/Cypress) and backend testing (JUnit 5, Mockito, TestContainers) is a must. Unit testing is must using any tool.
• Excellent communication skills; ability to translate technical concepts clearly for non-technical stakeholders.

Preferred Qualifications :

• Experience with message brokers such as Apache Kafka or RabbitMQ.
• Familiarity with observability tooling - Prometheus, Grafana, ELK Stack, Datadog.
• Knowledge of OAuth 2.0, JWT, and API security best practices.
• Exposure to TypeScript, GraphQL, or micro-frontend architecture.
• Experience with design systems and Storybook-driven component development.
• Open-source contributions or technical publications are a plus.