Colibri Digital

Contract Full Stack Engineer

United Kingdom full-time Mid Salary not listed
full-time Mid level Technology & IT Curated
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About the role

Colibri Digital is a specialist engineering consultancy delivering advanced data and AI solutions
for clients across sectors including finance, healthcare, logistics, government and technology.
As trusted partners of AWS and Databricks, we help organisations design, build and scale
intelligent systems that deliver measurable business outcomes. We lead from the front in
Generative and Applied AI adoption — guiding clients from uncertainty to confident,
production-grade delivery.
The role
We are seeking a highly skilled Full Stack Developer to join our team in a high-impact, client-facing capacity on a 6 month contract.

This is a remote role, however the successful person must be based in the UK.

Skills, Knowledge and Expertise

A passion for the craft — you're driven by engineering excellence and committed to fostering that culture across the team.

Platform engineering — experience building and operating multi-tenant platforms. Hands-on experience building robust and scalable platforms with zero-downtime deployments across numerous customer environments.

Strong software engineering foundations — you write clean, maintainable, testable code and have a solid grasp of system design. Have strong command of Go, plus working knowledge of Python. Comfort with Rust is also valued.

Infrastructure expertise — understanding of what it takes to build software that runs in cloud, on-premises, and air-gapped environments, including managing offline content, mirroring and provenance. Experience with HA stateful deployments including backup/restore and replication.

Cloud native — fundamental understanding of Kubernetes primitives, how to debug live issues and how to harness infrastructure as code for deployment.

API and service design maturity — experience designing APIs, CLIs and SDKs and APIs across multi-service systems with attention to versioning and backward compatibility.

User code execution — experience building systems that run user code safely, robustly, and securely, with an understanding of sandboxing, isolation, and threat models.

Security awareness — experience designing for security requirements, including authentication and access control (e.g., OIDC, RBAC), and taking part in security testing and compliance workflows.

Reliability and observability mindset — experience providing QoS guarantees, implementing monitoring and alerting, and optimising observability in production.

Communication and leadership — excellent communication skills to understand customer needs and translate them into technical specifications. Experience mentoring engineers and facilitating technical decisions.

Incremental mindset — you work in small steps toward larger goals, driving change through continuous improvement rather than massive redesigns. You can zoom in on details and zoom out to see the big picture.

Nice to have's:

Polyglot programming — deep expertise in Go and strong command of Python, with mastery of additional high-performance compiled languages like Rust or C++ considered a plus.

DevEx expertise — hands-on experience building developer environments including Git hosting platforms (e.g.,Gitea, GitLab), workspace tooling (e.g., Coder, JupyterLab) and package registries (e.g., Harbor, Nexus).

ML packaging — experience with GPU/CUDA-aware environments and Python dependency management.

Domain knowledge — understanding of 3D geometry processing (meshes, point clouds) and data structures used in physics-based simulations.

Advanced testing — experience with fuzzing, deterministic simulation testing, or fault injection in production systems.

Diagnostic and optimisation skills — proactive approach to diagnosing performance bottlenecks in data processing and storage systems.

Originally posted on Himalayas

Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Mid
Technology & IT API integration Finance Operations Python Remote Collaboration Mid level

Likely questions

  1. Tell us about work you have done that is close to the Contract Full Stack Engineer role.
  2. How would you approach your first 30 days at Colibri Digital?
  3. Which of API integration, Finance and Operations have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with API integration, Finance and Operations.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Contract Full Stack Engineer role because I can bring practical experience in API integration, Finance and Operations, learn the team quickly, and contribute to the outcomes Colibri Digital needs from this hire.

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