Java Software Engineer (contract outside of IR35)
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 9h ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 7d ago
The date the source published, not the day we noticed it (2026-10-26). Last seen at its source 1h ago.
We have tracked this listing since 26 Oct 2026 (6 days). The employer's own board has carried it every time we have read it, most recently 1 hour ago.
Is it remote?
Remote
That is the location the employer filed this posting under. Quoted as written — we do not re-word the source's own location.
Who may apply?
Not stated
The description states no restriction of its own. This is the source's own tag.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
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Greenhouse employer's own board first seen 6d ago · last seen 1h ago
The listing
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