Back End Developer

UBDS Group; London; On-site; GBP 50,000 - 75,000; Full time

Job summary

A technology solutions company in London is seeking a Back-End Developer to design robust APIs and microservices in AWS. Ideal candidates will have strong skills in Java, Spring Boot, and AWS services. This role offers opportunities for professional growth and a supportive, innovative work culture, plus excellent benefits like private medical cover and training programs.

Benefits

Private medical cover

Discretionary bonus

25 days holiday plus additional days

Electric Vehicle leasing

Death in service cover

Qualifications

• 2–6 years of back-end development experience with Java.
• Minimum 2 years working on AWS cloud platforms.
• Experience mentoring teams and leading technical efforts.

Responsibilities

• Develop and maintain back-end components using Java and Spring Boot.
• Design and implement RESTful APIs within secure architectures.
• Collaborate with DevOps teams and ensure engineering best practices.

Skills

Java (11+)

Spring Boot

AWS (SQS, SNS, RDS, Lambda, ECS, EventBridge)

CI/CD pipelines

Agile methodologies

Job description

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Rayo, part of the UBDS group, is seeking a Back-End Developer to design, build, and maintain robust APIs and microservices for AWS-hosted platforms. This role involves delivering secure, scalable server-side solutions using Java and Spring Boot, with strong integration across AWS managed services. The successful candidate will also be expected to contribute to DevOps practices, performance optimisation, and team-wide code quality.

This opportunity is suitable for experienced developers looking to deepen their technical leadership, as well as those progressing into a senior capacity with hands-on AWS delivery and solution design experience.

Key Responsibilities:

• Develop and maintain back-end components using Java (11+) and Spring Boot.
• Design and implement RESTful APIs and microservices within secure, cloud-native architectures.
• Integrate with a range of AWS managed services such as SQS, SNS, RDS, Lambda, ECS, and EventBridge.
• Apply test-driven development practices, ensuring code quality and maintainability.
• Contribute to CI/CD pipelines using tools such as Jenkins, GitHub Actions, or AWS CodePipeline.
• Collaborate with DevOps teams and demonstrate awareness of infrastructure-as-code principles.
• Lead on performance tuning, monitoring, and debugging activities.
• Mentor junior developers and participate in code reviews and solution design discussions.
• Support the enforcement of engineering best practices across Agile delivery teams.

Requirements

• Strong proficiency in Java (11+) and Spring Boot frameworks.
• Experience designing and building scalable APIs and microservices.
• Hands-on experience with AWS services including SQS, SNS, RDS, Lambda, ECS/EKS, and EventBridge.
• Familiarity with CI/CD pipelines and DevOps collaboration in cloud environments.
• Demonstrable understanding of test-driven development and debugging techniques.
• Comfortable working within Agile teams and engaging in collaborative delivery.
• 2–6 years of Java back-end development experience, including production deployments.
• Minimum of 2 years working on AWS cloud platforms in delivery roles.
• Prior experience designing secure and scalable systems for public sector or enterprise clients.
• AWS certifications (e.g., AWS Certified Developer or Solutions Architect) are advantageous.
• Experience mentoring teams and leading technical implementation efforts.

Why people choose to grow their careers at UBDS Group

Professionals choose to grow their careers at UBDS Group for its reputation as a dynamic and forward-thinking organisation that is deeply committed to both innovation and employee development. At UBDS Group, employees are given unique opportunities to work on cutting-edge projects across a diverse range of industries, exposing them to new challenges and learning opportunities that are pivotal for professional growth. The Group’s culture emphasises continuous improvement, offering ample training programs, mentorship, and the chance to gain certifications that enhance their skills and marketability.

UBDS Group fosters a collaborative environment where creativity and innovation are encouraged, allowing employees to contribute ideas and solutions that have a tangible impact on the company and its clients. This combination of professional development, a culture of innovation, and the opportunity to make meaningful contributions makes UBDS Group an attractive place for those looking to advance their careers and be at the forefront of technological and operational excellence.

Employee Benefits

• Training – All team members are offered a number of options in terms of personal development, whether it is technical led, business acumen or methodologies. We want you to grow with us and to help us achieve more
• Private medical cover for you and your spouse/partner, offered via Vitality
• Discretionary bonus based on a blend of personal and company performance
• Holiday – You will receive 25 Days holiday, plus 1 day for Birthday and 1 day for your work anniversary in addition to UK bank holidays
• Electric Vehicle leasing with salary sacrifice
• Death in service cover

About UBDS Group

At UBDS Group our mission is to support entrepreneurs who are setting new standards with technology solutions across cloud services, cybersecurity, data and AI, ensuring that every investment advances our commitment to innovation, making a difference, and creating impactful solutions for organisations and society.

We are an equal opportunities employer and do not discriminate on the grounds of gender, sexual orientation, marital or civil partner status, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability or age.