Senior Software Engineer

TreQ; Milton; On-site; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Equity participation

36 days annual leave

Mintago benefits package

Bean-to-cup coffee on tap

Job summary

TreQ, based in Milton, UK, is building open-architecture quantum infrastructure to accelerate practical quantum computing. We seek a Senior Software Engineer to design and implement a quantum orchestrator that interfaces with external quantum hardware and transpilers, using .NET background services and Python where needed.

You will work with systems engineers, software leads, and partners to deliver robust, scalable software.

Qualifications

• Experience designing software for hardware or instruments is preferred.
• Strong knowledge of .NET and C#, with Python familiarity.
• Experience with Docker, systemd, and Ubuntu environments.
• Ability to specify, design, and document bi-directional APIs clearly.

Responsibilities

• Architect sub-components of the quantum orchestrator from high level to data structures.
• Lead AI agents to build and maintain orchestration solutions interfacing with external hardware.
• Automate deployments and document CI/CD workflows.
• Review code through peer feedback and maintain high software quality.
• Self-manage sprint tasks in a fast-moving, collaborative team.
• Collaborate with systems engineers and suppliers to deliver open-architecture infra.

Skills

C#

NET background services

Python

Docker

SignalR

Blazor

APIs design

CI/CD

Tools

Systemd

Ubuntu

Git

Job description

Here at TreQ, we are accelerating the path to useful quantum computing by designing, deploying, and operating open-architecture quantum computing infrastructure that evolves as quantum technologies advance.

We are shaping the future of quantum computing and as we expand, we are searching for a Senior Software Engineer to join our team. Your primary responsibility as a Senior Software Engineer will be building a quantum orchestrator that interfaces directly with external quantum hardware and software, including transpilers. You will work closely with TreQ’s systems engineers, software lead, and supply chain partners to pioneer open-architecture quantum infrastructure.

As a Senior Software Engineer, your day will see you:

• Architect sub-components within the TreQ quantum orchestrator from high level flow down to required data structures.
• Manage AI agents to build, document, and maintain quantum orchestration and integration solutions (primarily .NET background worker services) that interface directly with external quantum hardware
• Automate and document software deployments on clean Ubuntu environments using Docker and systemd
• Establish, document, maintain, and streamline CI workflows to ensure high software quality
• Actively participate in peer code reviews
• Self-manage sprint tasks within a fast-moving, collaborative team

You will be a success in this role if:

You know about:

• Algorithm design
• Selection of appropriate data structures
• The architecture of .NET background worker services and message queues
• Docker container deployments
• SignalR or Blazor

You can:

• Demonstrate good knowledge of software system architecture
• Demonstrate high proficiency in .NET and C#, with familiarity in Python
• Demonstrate the ability to specify, design, and document bi-directional APIs cleanly
• Independently problem-solve

You’ve had experiences like these:

• Developing software that interacts directly with external hardware or instruments
• Using AI tools to assist in generating unit tests, documentation, and routine code

You like:

• Security-first thinking and standard software patterns and practices
• Functional programming patterns (e.g., LINQ, immutable records)
• Thriving in a small, supportive, nimble team, where knowledge sharing and team growth are prioritized, working on deep tech challenges
• Letting AI handle repetitive/routine tasks so you can focus on core logic
• Writing TCP/IP stacks, compiler passes, or authentication solutions.

There is extra kudos if you have a degree in computer science, software engineering, physics, or can share equivalent practical experience. You don't need to be have a background in quantum to apply. We value practical engineering experience as much as formal academic credentials. People join TreQ from industry, national laboratories, startups, academia, and military service.

TreQ is a veteran-owned, woman-owned small business and an equal opportunity employer. We hire based on capability, character, and the ability to contribute to our mission.

Additional Information:

Work Location & Collaboration

TreQ is a hands-on engineering organisation tackling complex systems at the frontier of computing. This work requires close collaboration, trust, and rapid iteration, so most roles work primarily in person where our teams design, build, and operate systems together. Some hybrid flexibility may be available, though candidates should expect to spend the majority of their time on-site with teammates.

Export Control Work Authorisation Compliance

Some roles at TreQ involve access to technologies subject to export control laws in the United States, the United Kingdom, and other jurisdictions (including ITAR and EAR). Candidates for these roles must be eligible to access export-controlled technology without TreQ obtaining an export license. In accordance with applicable law, TreQ may also verify citizenship, immigration status, and the right to work where required. Certain roles may not be eligible for visa or export license sponsorship.

We believe that solving complex technical, scientific, and operational challenges requires a diversity of thought, background, and perspective. We are an equal opportunity employer committed to creating an inclusive, barrier-free, and supportive workplace where every team member can thrive and perform at their best.

We welcome applications from all qualified candidates regardless of age, disability, gender reassignment, marriage or civil partnership status, pregnancy or maternity, race, religion or belief, sex, sexual orientation, or socio-economic background. In full alignment with the UK Equality Act 2010, all hiring decisions are made strictly on merit, technical capability, and candidate potential. We want every applicant to have a positive, fair, and transparent recruitment experience. We are committed to making reasonable adjustments throughout all stages of our application, assessment, and interview process for candidates with disabilities, physical or mental health conditions, or neurodivergent requirements.

If you require any support, adjustments, or alternative information formats such as extended time for technical assessments, adjusted interview timings, accessible meeting spaces, or specific software compatibility, please inform our talent team.

TreQ aspires to be the quantum computing company people want to work for. We see ourselves as stewards of the brilliant and driven people who choose to invest part of their lives with us. In addition to meaningful work, we offer:

• Competitive benchmarked salaries
• Equity participation
• Entrance into our benefits scheme run by Mintago
• 36 days annual leave (made up of holiday allowance plus UK and US public holidays)
• Bean-to-cup coffee on tap