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- Tasks: Design and develop high-performance RESTful APIs using Java and JVM frameworks.
- Company: Join a forward-thinking tech company focused on innovation and collaboration.
- Benefits: Enjoy competitive salary, health benefits, remote work options, and growth opportunities.
- Why this job: Make an impact by building secure, scalable applications with cutting-edge technology.
- Qualifications: 5+ years in Java Back End development and strong knowledge of JVM internals.
- Other info: Dynamic team environment with excellent career advancement potential.
The predicted salary is between 36000 - 60000 £ per year.
We are seeking a skilled Java API Developer with strong experience in JVM-based Back End systems and secure authentication mechanisms using OAuth 2.0 and JWT. The ideal candidate will design, develop, and maintain high-performance RESTful APIs and ensure secure, scalable, and reliable application architecture.
Responsibilities & Qualifications
- Design, develop, and maintain RESTful APIs using Java and JVM-based frameworks.
- Build microservices using Spring Boot or similar JVM frameworks.
- Implement authentication and authorization using OAuth 2.0 and JSON Web Token.
- Work with JVM performance tuning, garbage collection, and memory management.
- Develop secure API integrations with third-party services.
- Implement API security best practices (token validation, encryption, secure headers).
- Collaborate with Front End, DevOps, and product teams.
- Write unit and integration tests using frameworks like JUnit and Mockito.
- Participate in code reviews and ensure coding standards are maintained.
- Deploy applications in cloud environments (AWS/Azure/GCP).
Experience
- 5+ years of experience in Java Back End development.
- Strong understanding of JVM internals (memory model, GC, thread management).
- Hands-on experience with Spring Framework ecosystem.
- Experience implementing OAuth 2.0 flows (Authorization Code, Client Credentials, etc.).
- Strong knowledge of JSON Web Token structure, signing (HMAC/RSA), and validation.
- Experience with RESTful API design principles.
- Knowledge of relational databases (MySQL/PostgreSQL) and ORM tools (Hibernate/JPA).
- Familiarity with CI/CD pipelines and containerization (Docker, Kubernetes).
- Understanding of API gateways and security best practices.
Preferred Qualifications
- Experience with microservices architecture.
- Knowledge of API documentation tools (Swagger/OpenAPI).
- Experience with message brokers (Kafka/RabbitMQ).
- Exposure to reactive programming (Spring WebFlux).
- Cloud-native development experience.
Java API Developer in Westminster employer: Dns Info Ltd
Contact Detail:
Dns Info Ltd Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Java API Developer in Westminster
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those who work with Java and APIs. Attend meetups or webinars related to JVM-based systems to meet potential employers and get your name out there.
✨Tip Number 2
Show off your skills! Create a GitHub repository showcasing your projects, especially those involving RESTful APIs and OAuth 2.0. This gives employers a chance to see your coding style and problem-solving abilities in action.
✨Tip Number 3
Prepare for technical interviews by brushing up on your knowledge of JVM internals and API security best practices. Practice coding challenges that focus on Java and microservices to boost your confidence before the big day.
✨Tip Number 4
Don’t forget to apply through our website! We’re always on the lookout for talented Java API Developers. Make sure your application stands out by tailoring it to highlight your experience with Spring Boot and secure authentication mechanisms.
We think you need these skills to ace Java API Developer in Westminster
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with Java, RESTful APIs, and any relevant frameworks like Spring Boot. We want to see how your skills match the job description, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re passionate about Java development and how your experience aligns with our needs. Keep it concise but engaging – we love a good story!
Showcase Your Projects: If you've worked on any cool projects involving microservices or API security, make sure to mention them! We’re keen to see real-world applications of your skills, so include links or descriptions of your work.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it’s super easy – just a few clicks and you’re done!
How to prepare for a job interview at Dns Info Ltd
✨Know Your Java Inside Out
Make sure you brush up on your Java skills, especially around JVM internals and performance tuning. Be ready to discuss how you've optimised memory management and garbage collection in past projects.
✨Master RESTful API Design
Familiarise yourself with RESTful API principles and be prepared to showcase your experience in designing and maintaining APIs. Have examples ready that demonstrate your ability to implement secure authentication mechanisms like OAuth 2.0 and JWT.
✨Showcase Your Microservices Experience
If you've worked with microservices, particularly using Spring Boot, make sure to highlight this during the interview. Discuss specific challenges you faced and how you overcame them, as well as your understanding of CI/CD pipelines and containerisation.
✨Prepare for Technical Questions
Expect technical questions related to unit testing with JUnit and Mockito, as well as API security best practices. Practise explaining concepts clearly and concisely, as communication is key when collaborating with Front End and DevOps teams.