6 senior backend developer jobs found

Senior Backend Developer (Fully Remote, Node.js) Contract: Outside IR35 Duration: 3 months, potential extension Start: ASAP Day Rate: £550/day Location: Fully Remote (UK hours)   The Role You'll join as a peer alongside our existing senior developers. You'll own features and integration workstreams end to end, with collaboration through code review and shared technical decision-making.   The work splits roughly 75/25 between API development for our FHIR-based clinical platform and third-party integrations. Genuinely interesting domain problems, not generic CRUD. Features are scoped collaboratively with product. You'll own implementation through to deployment, with your peer as code review partner.   What you'll work on Building and extending RESTful APIs in TypeScript and Node.js Integrating with third-party platforms including cal.com, Awell (clinical workflow engine) and healthcare data...

Product Designer - 3 Month Contract 19 Feb 2026   R-0004483   We’re reinventing payments. In less than four years, Dojo disrupted the market to become the largest and most loved acquirer in the UK. Our payments infrastructure, purpose-built for in-person commerce, is game changing. Now, over 150,000 customers across four countries choose to transact billions with us every year. But we’re just getting started. Our people are the driving force behind our success. They are our greatest investment and our ultimate competitive advantage. We hire exceptional people and give them the autonomy, trust, and ownership to thrive. The results take care of themselves.   The Role... As a Product Designer, you will play a pivotal role in shaping the user experience of our next-generation Platforms. You will be the design authority for complex, domain-driven workflows that power retail and hospitality businesses. Our platforms...

Energy storage is the most exciting area in energy today. Massive amounts of energy storage are required if renewable energy is to take its rightful place on the electric grid. Invinity provides an alternative to the most common type of battery, lithium-ion because the battery technology that works so well in our pockets doesn’t work as well at the grid scale; it wears out, limits use, and even catches fire.   Manufactured as a standardised product in a factory, Invinity’s vanadium flow batteries don’t degrade, won’t catch fire, and can be operated continuously from full charge to full discharge for over 30 years. Invinity has 75 megawatt-hours of its modular battery systems in 82 projects across 15 countries - more than any other company in the space. We’ve deployed the largest flow battery systems in the U.S., Canada, Australia, and the UK, and are supported by the UK's National Wealth Fund, some of the world’s leading...

About The Role : This role is to support the delivery of the Finance Service Offer Programme and more specifically the Finance Service Offer Change Project. Finance does not currently have a clear Finance Blueprint or Operating Model, leading to disparity between what Finance delivers and what our partners value and need. There is a lack of clarity on team's roles, responsibilities and priorities, causing blurred lines of governance and causing processes and approvals to be delivered inefficiently and ineffectively. This programme aims to address these issues and to develop a clearly defined Finance Service Offer (FSO). This will be achieved through developing a structured and strategic Finance Operating Model that aligns with organisational priorities and Government Functional Standards (GovS006).   The FSO Change Project is the first step for this as it is focused on transforming financial planning and ownership by simplifying systems, clarifying responsibilities,...

Energy storage is the most exciting area in energy today. Massive amounts of energy storage are required if renewable energy is to take its rightful place on the electric grid. Invinity provides an alternative to the most common type of battery, lithium-ion because the battery technology that works so well in our pockets doesn’t work as well at the grid scale; it wears out, limits use, and even catches fire.   Manufactured as a standardised product in a factory, Invinity’s vanadium flow batteries don’t degrade, won’t catch fire, and can be operated continuously from full charge to full discharge for over 30 years. Invinity has 75 megawatt-hours of its modular battery systems in 82 projects across 15 countries - more than any other company in the space. We’ve deployed the largest flow battery systems in the U.S., Canada, Australia, and the UK, and are supported by the UK's National Wealth Fund, some of the world’s leading...

Energy storage is the most exciting area in energy today. Massive amounts of energy storage are required if renewable energy is to take its rightful place on the electric grid. Invinity provides an alternative to the most common type of battery, lithium-ion because the battery technology that works so well in our pockets doesn’t work as well at the grid scale; it wears out, limits use, and even catches fire.   Manufactured as a standardised product in a factory, Invinity’s vanadium flow batteries don’t degrade, won’t catch fire, and can be operated continuously from full charge to full discharge for over 30 years. Invinity has 75 megawatt-hours of its modular battery systems in 82 projects across 15 countries - more than any other company in the space. We’ve deployed the largest flow battery systems in the U.S., Canada, Australia, and the UK, and are supported by the UK's National Wealth Fund, some of the world’s leading...