Senior Full-Stack Java Developer

Senior Full-Stack Developer – Skills

Experience: 6–9 years | Location: Bengaluru (5 days in office) | Joining: within 15 to 30 days

Must-have skills

Backend (Java and Spring Boot)

• 6+ years of hands-on Java development with Java 11/17+, including multithreading, concurrency, and the collections framework.
• Strong Spring Boot experience: REST APIs, Spring Data JPA, Spring Security, configuration, and exception handling.
• Designing clean, versioned REST APIs with consistent error handling and documentation (Swagger/OpenAPI).
• Performance tuning and optimisation of backend services.

Frontend (ReactJS)

• Hands-on production experience building React applications with hooks and functional components.
• State management using Redux or the Context API.
• Building reusable component libraries and structuring a scalable frontend codebase.
• Strong JavaScript (ES6+); TypeScript is preferred.
• Frontend performance optimisation (rendering, lazy loading, bundle size).

Database

• Strong SQL skills with PostgreSQL, MySQL, or SQL Server.
• Schema design, indexing, query optimisation, and transaction handling.
• JPA/Hibernate, including how to avoid common pitfalls such as N+1 queries and lazy-loading issues.

Security

• Authentication and authorisation using JWT and OAuth 2.0 / OIDC.
• Role-based access control.
• Secure coding practices (OWASP Top 10 awareness).

Quality and testing

• Unit and integration testing with JUnit and Mockito.
• Frontend testing with Jest or React Testing Library.
• Ability to set and enforce testing standards for the team.

Debugging and production support

• Debugging complex issues across the full stack (UI, API, and database).
• Root-cause analysis of production incidents and permanent fixes.

Senior-level responsibilities

• Solution design: breaking features into components, APIs, and data models before development starts.
• Code reviews: leading reviews and setting coding standards and best practices.
• Mentoring: guiding and unblocking two full-stack developers through pairing, reviews, and design discussions.
• Technical ownership: owning modules end to end, from design through deployment and support.
• Estimation and planning: sizing work realistically and flagging risks early to the CTO and product team.
• Communication: explaining technical decisions clearly to engineers, the CTO, and product stakeholders.

Good-to-have skills

• Microservices architecture and design patterns
• Microsoft Azure (preferred); AWS or GCP also valued
• Docker, with basic Kubernetes knowledge
• CI/CD pipelines (GitLab, Jenkins, or GitHub Actions)
• Messaging systems: Kafka, RabbitMQ, or Azure Service Bus
• Experience with multi-tenant SaaS products
• Exposure to aviation, training, EdTech, or other regulated domains
• AI/LLM integration in applications

Screening checklist

CheckMust showSpring BootProduction APIs they designed, not only builtReactProduction screens they built hands-on, not only integratedDesign ownershipAt least one module or feature they designed end to endCode reviewsEvidence they review others’ code and enforce standardsMentoringHas guided at least one junior or mid-level developerDebuggingCan walk through a real production issue they solvedAvailabilityCan join within 15 days and work 5 days from the Bengaluru office

Skills

Javascript, React Native, React.js, Spring Boot, Java, Leadership, Responsive Design, Microsoft Windows Azure