16 senior software engineer jobs found in Bristol

Senior Software Engineer Rate: £450 a day IR 35 Determination: Outside IR35 Location: Bristol Working Pattern: 20% onsite Clearance: SC Clearance required Stack overview: Python (including pytest), git, Docker and AWS with prior experience building full stack Flask You will join a global defence technology consultancy and take ownership of specific software work packages, including low level planning, delivery, and reporting, with ability to work independently and autonomously. You will have strong understanding of microservice software architecture, and design, implement, document and test software modules and components. What you'll bring Strong technical ability with proven experience delivering software components and modules. Ability to work confidently, strategically and autonomously Ability to balance hands-on coding with document writing and planning session participation Your skills and experience: Proficiency in Python (including...

Senior Software Engineer Rate: £450 a day IR 35 Determination: Outside IR35 Location: Bristol Working Pattern: 20% onsite Clearance: SC Clearance required Stack overview: Python (including pytest), git, Docker and AWS with prior experience building full stack Flask You will join a global defence technology consultancy and take ownership of specific software work packages, including low level planning, delivery, and reporting, with ability to work independently and autonomously. You will have strong understanding of microservice software architecture, and design, implement, document and test software modules and components. What you'll bring Strong technical ability with proven experience delivering software components and modules. Ability to work confidently, strategically and autonomously Ability to balance hands-on coding with document writing and planning session participation Your skills and experience: Proficiency in Python (including pytest),...

Senior Software Engineer 6 month contract Based in Bristol Offering £60ph Outside IR35   Do you have experience in version control and configuration management (Git, AWS)? Do you have experience in Python(pytest)? Do you want to work with an industry-leading company?   If your answer to these is yes, then this could be the role for you!   As the Senior Software Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. Do you the nature of the work you will be involved in, you will be required to go through MOD SC clearance.   You will be involved in: Take ownership of specific software work packages, including low-level planning, delivery, and reporting Design, implement,...

Location: Bristol or Southampton (20% onsite) Duration: 6 month contract Rate: £61.90ph LTD (Outside IR35) Role details: Our client, a prominent player in the Defence & Security sector, is seeking a Senior Software Engineer with expertise in Python, Docker, and Cyber Security for a 6-month contract based in Bristol or Southampton. The role involves a hybrid working model with approximately 20% onsite presence. Key Responsibilities: Take ownership of specific software work packages, including low-level planning, delivery, and reporting, with the ability to work independently and autonomously. Possess a strong understanding of microservice software architecture. Design, implement, document, and test software modules and components. Peer review code, application design, and test results to ensure compliance with standards and governance. Troubleshoot complex issues and provide technical guidance to engineers. Mentor and support junior developers, sharing...

Senior Software Engineer 6 month contract Based in Bristol Offering £60ph Outside IR35 Do you have experience in version control and configuration management (Git, AWS)? Do you have experience in Python(pytest)? Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for you! As the Senior Software Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. Do you the nature of the work you will be involved in, you will be required to go through MOD SC clearance. You will be involved in: Take ownership of specific software work packages, including low-level planning, delivery, and reporting Design, implement, document, and test software modules and components Peer review...

Software Engineer — Secure, Mission‑Critical Systems Defence & Security Programme | Bristol (Hybrid) Contract | Outside IR35 Build Software That’s Actually Used — and Actually Matters This role isn’t about vanity features, throwaway prototypes, or code that never leaves a demo environment. We’re building secure, high‑integrity software systems used across Defence & Security programmes — platforms where quality, reliability, and correctness genuinely matter . If you’re a Software Engineer who wants to: Work on real production systems Learn from strong technical leadership Build software the right way in a high‑trust environment …then this project will stretch and reward you. What You’ll Be Working On As part of a multidisciplinary delivery team, you’ll be hands‑on in designing, building, and improving software that supports mission‑critical operations . You’ll: Design and develop high‑quality software components within a...

Senior Machine Learning Engineer (Outside IR35) | 6‑Month Contract 📍 Bristol (Hybrid – ~20% onsite) Build Machine Learning that Actually Matters This isn’t another recommender system. This isn’t ad‑tech. And it definitely isn’t “just moving notebooks into production”. We’re looking for a Senior Machine Learning Engineer to help design, build, and deploy mission‑critical ML systems used across defence, security, and high‑integrity public sector programmes . You’ll be working on problems where correctness, robustness, and trust matter as much as raw performance — and where your work has real‑world impact at national scale . 🔥 Why This Role Is Different Real ML engineering : production systems, not demos Work on secure, high‑integrity platforms where ML decisions matter Influence architecture , not just implementation Join a team that treats ML as software engineering , not science experiments Hybrid working with minimal onsite...

Lead Software Engineer — Mission‑Critical Delivery (Defence & Security) Contract | Bristol (Hybrid) | Outside IR35 | High‑priority programme Build software that actually matters. We’re delivering secure, high‑integrity platforms used across Defence & Security—systems where reliability, correctness and speed of delivery are non‑negotiable. If you’re a hands‑on leader who can turn complexity into shippable software and align multi‑disciplinary teams behind a clear plan, this is your arena. Why this role is different Real authority: You’ll own end‑to‑end technical delivery across multiple workstreams—not just “influence” it. High‑impact environment: What you build gets deployed and relied on , not shelved. Hands‑on leadership: Lead by example in code, pipelines, and architecture— engineering first , PowerPoint second. Calm in the storm: When the situation’s ambiguous or time‑critical, you set direction and move the needle . Hybrid working:...

Lead Software Engineer Rate: £600 a day IR 35 Determination: Outside IR35 Location: Bristol Working Pattern: 20% onsite Clearance: SC Clearance required Overview: Technical Leadership, Operational and People Management, Technical direction of complex projects A global defence technology consultancy ole are looking for an experienced Lead Software Engineer to provide hands‑on leadership across a high‑priority software delivery programme. This is a senior contractor role requiring a self‑starter who can quickly understand a complex problem domain, translate requirements into actionable deliverables, and drive engineering teams to successful outcomes. You will act as the technical and delivery focal point for multiple workstreams, ensuring work is sequenced, risks are managed, progress is unblocked, and the programme maintains momentum. This role blends technical leadership, delivery ownership, and stakeholder management, and is ideal for someone with a...

Lead Software Engineer Rate: £600 a day IR 35 Determination: Outside IR35 Location: Bristol Working Pattern: 20% onsite Clearance: SC Clearance required Overview: Technical Leadership, Operational and People Management, Technical direction of complex projects A global defence technology consultancy OLE are looking for an experienced Lead Software Engineer to provide hands-on leadership across a high-priority software delivery programme. This is a senior contractor role requiring a self-starter who can quickly understand a complex problem domain, translate requirements into actionable deliverables, and drive engineering teams to successful outcomes. You will act as the technical and delivery focal point for multiple workstreams, ensuring work is sequenced, risks are managed, progress is unblocked, and the programme maintains momentum. This role blends technical leadership, delivery ownership, and stakeholder management, and is ideal for someone with a...

Lead Software Engineer 6 month contract Based in Bristol Offering £80ph Outside IR35   Do you have experience in AI/ML development or model-based engineering? Do you have experience in Python, C#, or .NET? Do you want to work with an industry-leading company?   If your answer to these is yes, then this could be the role for you!   As the Lead Software Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. Do you the nature of the work you will be involved in, you will be required to go through MOD SC clearance.   You will be involved in: Own end-to-end technical delivery across the programme Make time-critical delivery decisions in the absence of programme leadership...

Lead Software Engineer 6 month contract Based in Bristol Offering £80ph Outside IR35 Do you have experience in AI/ML development or model-based engineering? Do you have experience in Python, C#, or .NET? Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for you! As the Lead Software Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. Do you the nature of the work you will be involved in, you will be required to go through MOD SC clearance. You will be involved in: Own end-to-end technical delivery across the programme Make time-critical delivery decisions in the absence of programme leadership Break down high-level requirements into structured deliverables...

Location: Bristol (20% onsite) Duration: 6 month contract Rate: £81.75ph LTD (Outside IR35) Role details: Our client, a prominent entity in the Defence & Security sector, is currently seeking an experienced Lead Software Engineer to provide hands-on leadership across a high-priority software delivery programme. Based in Bristol, this contract role requires a self-starter who can swiftly comprehend complex problem domains, translate requirements into actionable deliverables, and drive engineering teams to successful outcomes. Key Responsibilities: Delivery & Execution Own end-to-end technical delivery across the programme. Make time-critical delivery decisions in the absence of programme leadership. Break down high-level requirements into structured deliverables for engineering teams. Sequence work, set priorities, and maintain delivery plans. Act as escalation point for blockers, risks, and technical issues. Drive tangible progress across multiple...

Senior Automation Engineer – 6 Month Initial Contract – Leominster – Outside IR35 VIQU are supporting a growing UK-based software provider within the education technology sector who are seeking a hands-on Senior Automation Engineer to strengthen their product engineering capability. This role is focused on increasing delivery output and improving existing automation capability within a fast-paced product environment. The successful Senior Automation Engineer will work closely with developers, contributing within the C# codebase while reviewing and enhancing current automation frameworks. The Role: Assess and improve existing automation frameworks and test coverage Build and enhance automated UI and API tests using C# and Selenium Work closely with developers to embed quality within the development lifecycle Identify gaps in current automation and suggest practical improvements Create and execute SQL queries for backend validation and data-driven testing Integrate...

Python Developer — Secure, Mission‑Critical Systems Defence & Security | Remote | Contract | Outside IR35 Build software that’s actually used — and actually matters. We’re looking for a Python Developer to work on secure, mission‑critical systems used across Defence & Security programmes. This is real production software, not prototypes or proof‑of‑concepts — built with care, discipline, and purpose. What you’ll do Build clean, reliable Python services in a secure environment Write well‑tested, maintainable code (pytest, CI/CD) Work from clear requirements and sound architecture Collaborate with experienced Senior and Lead Engineers Ship software that supports real‑world operations Tech & environment Python / pytest Automated testing & CI/CD pipelines Modern service‑based architectures and APIs Calm, professional engineering culture What we’re looking for Solid experience building production software Strong Python...

DV Cleared DevOps Engineer Bristol based (Four days a week) Outside IR35 - Contract up until December 2026 DV Clearance is essential (Non negotiable) Are you a DV Cleared DevOps Engineer based in or around Bristol and ready for your next challenge? We’re looking for an experienced, forward-thinking DevOps professional to join our reputable and growing organisation. This is an opportunity to work on impactful, secure projects while playing a key role across the entire product lifecycle from concept through to deployment and continuous improvement. As a DevOps Engineer, you’ll be involved at every stage of our product development journey. You’ll collaborate closely with multidisciplinary teams to design, build, secure, and optimise software solutions that are safe, reliable, and ready for public consumption. You’ll also stay ahead of emerging technologies, identify market opportunities, and use customer insights to enhance product performance and...