← All Careers
Posted Jun 4, 2026

Java Software Engineer

About Us  In 2019, the founders were working as engineers solving complex cross-domain problems within government organisations.  TwinStream was formed to bring together their collective expertise and experience into a single business, focused on delivering technical excellence and high-quality service to clients.  Since then, the company has grown to over 100 team members across the UK, with colleagues working both on-site with clients, hybrid and remotely from home.    Details:   Salary: £70,000 - £90,000 Location: Remote    About the role:   TwinStream software engineers (Java) develop components of a cross-domain security system within an agile development team. They are involved in the entire software development lifecycle, which includes understanding the need for change, software design, coding, testing, delivery, and support. A TwinStream software engineer is not just a coder; they comprehend the business and domain challenges and utilize their technical skills to address those issues.     Responsibilities:  Understand high-level requirements and collaborate to find solutions     Investigate technologies to gain a deep understanding of their applicability    Develop high-quality code    Problem-solving deeply technical issues    Build tests at all stages of development from, unit tests to acceptance & performance tests    Build deployment code and pipelines, consulting with DevOps specialists    Analyse and resolve issues from 3rd line support    Collaborate in code development and review colleagues’ work    Participate in indicative estimating & planning   Any other reasonable duties relevant to skills and experience.     Key Skills   Experience in developing software using our core and/or related technologies     An agile development mindset    Experience in agile working practices including   TDD    BDD    Continuous delivery     DevOps   Pair programming  Estimating & Planning    Open, honest & positive attitude      Core Technologies   Java is the primary development language. Some exposure to other languages is useful, including Python, JavaScript, Golang, Bash Scripting, although these languages are used only occasionally.    The following technologies are used extensively in our solutions:    Java    Spring Boot    AWS – S3, Fargate, Lambda, SQS / SNS    RDBMS (Postgres, Oracle) & JPA    Mongo DB  DynamoDB    REST    Rabbit MQ    Docker    Linux    Terraform    Ansible    Jenkins    GIT/Bitbucket  GitLab    Kubernetes        Desirable Skills   OpenShift     Docker Compose/Swarm    Terraform    Ansible  Python  Diversity & Inclusion  We’re committed to building a diverse and inclusive workplace. We welcome applications from people of all backgrounds, experiences, and identities.  If you need any adjustments during the recruitment process, please let us know. We’re here to support you    Further Information:  To meet the security requirements of certain clients and industries we serve, any job offer will be contingent upon the successful completion of a security screening process.