Java Software Engineer (contract outside of IR35)
TwinStream
Salary undisclosed
Need a reasonable accommodation to apply or interview? Contact us.
JobMinglr uses automated technology to recommend jobs based on profile information and job preferences. Match Score does not determine eligibility for a position, prevent a user from viewing or applying to a job, or make hiring decisions on behalf of an employer.
Description
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:
3-month (rolling) contract outside of IR35
Rate: £500 - £600 per day /
Location: Remote, with potential travel to the Bristol office in the future.
Security: BPSS
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
- C++
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:
Due to the nature of the work and the sectors we support, any offer of employment will be subject to the successful completion of the relevant security screening and clearance process.
This role requires eligibility for [BPSS / SC / DV] clearance. As part of the vetting process, candidates must meet the UK Government's residency and right-to-work requirements associated with the required level of clearance.
About this role
TwinStream is seeking a Java Software Engineer to work on cross-domain security systems within an agile development team. This is a 3-month rolling contract (outside IR35) at £500–£600 per day, primarily remote with potential future travel to the Bristol office. The role requires BPSS security clearance and eligibility to work in the UK.
You'll take ownership across the full software development lifecycle—from understanding requirements and designing solutions through coding, testing, and deployment. Beyond writing code, the position demands technical problem-solving and the ability to grasp both business and domain challenges. Your responsibilities span unit and acceptance testing, building deployment pipelines in consultation with DevOps, code review, and resolving production issues escalated from support. You'll work in an agile environment practicing TDD, BDD, pair programming, and continuous delivery.
The core tech stack centers on Java and Spring Boot, with heavy use of AWS (S3, Fargate, Lambda, SQS/SNS), relational and NoSQL databases, Docker, Kubernetes, Terraform, Ansible, and Jenkins. Experience with these technologies is essential; familiarity with Python, JavaScript, Golang, or Bash is a bonus. You should bring an agile mindset, collaborative attitude, and comfort with estimating and planning. OpenShift, Docker Compose/Swarm, and C++ are desirable but not required.
Pay for this role
The employer didn't post a pay range for this role. That usually means pay is set in negotiation, which favors whoever arrives with numbers. Check ranges on comparable Java Software Engineer (contract outside of IR35) postings in your area, and analyze any offer before you accept it.
Before you apply, worth reading
How JobMinglr reads this job
Every listing here is scored against your profile before you apply: skills overlap, experience level, location and work arrangement, each weighted and explained. You see the score and the reasons, not just a list. How the matching works.