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9 senior backend developer jobs found

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Contract Spy
Jun 01, 2026
up to 6 Months
Senior Backend Engineer (Go) at CloudFactory, Remote, 4 Months, £Contract Rate
Contract Spy Remote
At CloudFactory, we are a mission-driven team passionate about unlocking the potential of AI to transform the world. By combining advanced technology with a global network of talented people, we make unusable data usable, driving real-world impact at scale. More than just a workplace, we're a global community founded on strong relationships and the belief that meaningful work transforms lives. Our commitment to earning, learning, and serving fuels everything we do as we strive to connect one million people to meaningful work and build leaders worth following. Our Culture At CloudFactory, we believe in building a workplace where everyone feels empowered, valued, and inspired to bring their authentic selves to work. We are: Mission-Driven: We focus on creating economic and social impact. People-Centric: We care deeply about our team's growth, well-being, and sense of belonging. Innovative: We embrace change and find better ways to do things together. Globally...
Contract Spy
May 21, 2026
Duration not stated
Software Test Engineer QA at YO IT CONSULTING, Remote, £Contract Rate
Contract Spy Remote
Partnering with a top AI research organization to evaluate and improve how coding assistants reason, act, and communicate during development workflows. We’re seeking technically sharp experts (especially those with experience in code review, testing, or documentation) to assess full transcripts of user–AI coding conversations. This short-term engagement helps shape the future of developer-assisting AI systems. Key Responsibilities Review long-form transcripts between users and AI coding assistants Analyze the AI’s logic, execution, and stated actions in detail Score each transcript using a 10-point rubric across multiple criteria Optionally write brief justifications citing examples from the dialogue Detect mismatches between claims and actions (e.g., saying “I’ll run tests” but not doing so) Ideal Qualifications Top choices: Senior or Staff Engineers with deep code review experience and execution insight QA Engineers...
Contract Spy
May 20, 2026
Duration not stated
CRM Solutions Engineer at The Legal Director, Remote, £450-£600 per day
£450 - £600 per day
Contract Spy Remote
A Freelance CRM Solutions Engineer is needed to join The Legal Director, a scaling B2B legal services firm entering a critical stage of operational maturity. Working directly with the leadership team, this is a high impact project role focused on reviewing, redesigning and rebuilding the systems that underpin the commercial engine. This is not a standard CRM admin brief. It sits at the intersection of systems architecture, product thinking, operational design and hands on technical delivery. You will assess the current environment, untangle technical debt, and design a future state that is commercially practical, scalable and aligned to how the business actually works. The Legal Director provides fractional legal support to SMEs through a flexible model that combines a core team with a large network of freelance lawyers. As the business grows, the need for clarity across pipeline tracking, workflow management, reporting and integrations has become critical. Joining...
Contract Spy
May 18, 2026
6 Months or more
Senior Backend .NET Engineer (AWS, Claude Code) at Reapit Ltd, Remote, 6 Months, £Excellent Day Rate (Outside IR35)
Contract Spy Remote (United Kingdom)
Outside IR35 contract - 6 months - excellent day rate - remote Reapit - Who are we? Reapit is the original end-to-end business technology provider for estate agencies of all sizes. We've been helping sales and lettings agents build relationships and grow their businesses for more than 25 years. Our technology empowers property professionals across Europe, the Middle East, Australia, and New Zealand to work with buyers, sellers, tenants, and landlords to deliver a dream home experience. Worldwide, over 100,000 agents across more than 15,000 branches use Reapit to run their businesses, manage properties, collect rent, engage clients, and provide outstanding customer service every time. What you'll be doing Reporting to the Director of Engineering, you'll operate as a highly senior, technically hands-on Back End engineer, Embedded into a squad and owning delivery of substantive, cloud-native services end-to-end. Ad-hoc client interaction, supporting...
Contract Spy
May 14, 2026
Duration not stated
Software Test Engineer QA at YO IT CONSULTING, Remote, £Contractor Rate
Contract Spy Remote
Partnering with a top AI research organization to evaluate and improve how coding assistants reason, act, and communicate during development workflows. We’re seeking technically sharp experts (especially those with experience in code review, testing, or documentation) to assess full transcripts of user–AI coding conversations. This short-term engagement helps shape the future of developer-assisting AI systems. Key Responsibilities Review long-form transcripts between users and AI coding assistants Analyze the AI’s logic, execution, and stated actions in detail Score each transcript using a 10-point rubric across multiple criteria Optionally write brief justifications citing examples from the dialogue Detect mismatches between claims and actions (e.g., saying “I’ll run tests” but not doing so) Ideal Qualifications Top choices: Senior or Staff Engineers with deep code review...
Contract Spy
Jun 01, 2026
6 Months or more
Lead Developer at The Electoral Commission, Remote, £Contract Rate
Contract Spy Remote (United Kingdom)
The Role As Lead Developer, you'll take end-to-end ownership of a critical digital service, working across the full software development lifecycle from early-stage design and discovery through to delivery, scaling and ongoing live support. This is a hands on technical leadership role, with a genuine balance between engineering and collaboration. You'll remain close to the code while also working with product, data and stakeholders to shape the long-term direction of the service. You'll initially work closely with Democracy Club's developers, the third-party organisation which currently provides postcode specific election information. The initial stage involves working with existing code and evaluating how best to transition it in-house.   This role sits at the heart of one of the Commission's most significant digital initiatives - the transfer and development of a voter information service used by millions of citizens. You'll be responsible for delivering...
Contract Spy
May 28, 2026
6 Months or more
Lead Developer - SC Cleared at Ministry of Justice, Remote, 6 Months, £Contract Rate
Contract Spy Remote (London, UK)
SC Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks. Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ) preference may be given to candidates who meet all of the essential criteria and hold active SC clearance.    The Ministry of Justice (MoJ) priorities include improving public safety and reducing reoffending by reforming prisons, probation and youth justice, and building a justice system which makes access to justice swifter and more certain for all citizens whatever their background. Project professionals in the MoJ help to improve the government's ability to protect the public and reduce reoffending, and to provide a more effective, transparent and responsive criminal justice system for victims and the public.   As a  Lead Developer , your main responsibilities will be:...
Contract Spy
May 28, 2026
6 Months or more
Fullstack Developer - SC Cleared at Cabinet Office, Remote, 6 Months, £Contract Rate
Contract Spy Remote
The Cabinet Office supports the Prime Minister and ensures the effective running of government. The Cabinet Office is also the corporate headquarters for the government, in partnership with HM Treasury, and takes the lead in certain critical policy areas. More information about the Cabinet Office can be found on its website at: www.gov.uk/government/organisations/cabinet-office   SC Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks. Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ) preference may be given to candidates who meet all of the essential criteria and hold active security clearance.    As a Fullstack Developer , your main responsibilities will be: Collaborate with stakeholders in the Cyber team to gather requirements, understand the project roadmap and align on...
Contract Spy
May 14, 2026
Duration not stated
Odoo Full-Stack Developer (Odoo 17/18/19) at Spa Parts Vortex, Remote, 6-12 Months, £Contract Rate
Contract Spy Remote
Odoo Full‑Stack Developer (Odoo 17/18/19) Contract Type: Fixed‑term contract (6–12 months). Work Mode: Fully remote. Open to candidates based in the UK or overseas, with flexibility to work across time zones as required. Primary Focus: Odoo 17/18/19 custom development, eCommerce, Inventory, Stock & Website workflows. About Us Spa Parts Vortex is Europe’s leading trade supplier of hot tub parts and a growing customer base for our own range of Hot Tubs, with over 2,000 active trade customers across UK and Europe. Founded in 2008, our journey has been shaped by a passion for quality, a commitment to exceptional service, and a focus on delivering value to the professional trade sector. As we continue our growth across the UK, EU, and US markets, we are building a dynamic development team to help scale the business efficiently, profitably, and sustainably. Role Overview We are seeking a highly capable Odoo Full‑Stack...
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