50 backend engineer jobs found

Senior Backend Engineer (NodeJS) – HubSpot Experience – Remote - £600 per day Outside IR35 Role Overview We are seeking a Senior Backend Engineer to join one of our established engineering teams. This role requires a highly capable, proactive senior developer who is confident taking ownership, making decisions, and collaborating across teams. You will work across two key areas — primarily extending and enhancing a Commercial Data platform, while also taking technical ownership of an existing HubSpot implementation that is now being developed and maintained in-house. Prior HubSpot experience is essential for this role. The position will be approximately 70% focused on backend platform development and 30% on leading HubSpot development and improvements, working closely with architecture and product stakeholders. Technology NodeJS, PostgreSQL, AWS, HubSpot (essential), API integrations The Project You’ll contribute to the continued evolution of a...

Senior Backend Engineer - HIRING ASAP Positions Available: 2 Start Date: ASAP Duration: 6 Months Location: Remote (UK Based) Rate: £500 - £600 per day, outside IR35 Summary These positions are suited for Senior folks, who are motivated, proactive, not afraid to take leadership and are confident to make decisions but are also good team players and have a very good technical skill. Tech stack you will be working in is NodeJS + PSQL + AWS. Responsibilities for Role #1 CDM + HubSpot - extending our clients' Commercial Data Manager including tech improvements and new features, but also taking over maintenance and lead on HubSpot that was built for them by an external agency, however now they're looking into continue expanding it and maintaining it in house. The role will be split 70% CDM and 30% HubSpot, with this person being the key developer looking after HS, alongside with their architect, so for this role previous experience with HubSpot will be essential....

Backend Engineer – C#, .Net, Azure | Financial Services | £600/day outside IR35| Hybrid We’re partnering with a leading financial services firm in the FinTech payment space that’s investing heavily in modernising its technology stack. With a new tech leader driving innovation, the focus is on building in-house systems that are scalable, reliable, and future-ready. About the Role Backend Engineer position You’ll take ownership of building and enhancing key client-facing applications using C#, .Net, Azure . As a Backend Engineer you will have tried and tested experience joining a FinTech/Financial Services company at the stage of 0-50 employees. This company is looking to grow significantly, building out 4 new engineering teams include Seniors and Team Leads. The work spans complex financial products, so you’ll have the chance to engage with both technical and business stakeholders across the UK. 💰 Paying up to £600 per day (Outside IR35) 🏢 1–2 days per week...

Senior Backend Engineer (Go/GCP) 6 month contract initially, Outside IR35, Fully remote role (UK/Europe) A leading global consumer technology company is building products that prioritise safety, equity, and meaningful user experiences. They are seeking a Senior Backend Engineer with strong technical judgment, a high sense of ownership, and the ability to drive work forward even when requirements are not fully defined. You'll work primarily with Golang and Google Cloud Platform, helping to design, build, and evolve Back End systems that support products used by millions of users worldwide. This role suits someone who thrives in ambiguity, executes with focus, and elevates teams through clarity, momentum, and example. What You'll Do Design, build, and operate reliable, scalable Back End services using Golang Own and evolve systems running on GCP, contributing to architecture, reliability, observability, and cost optimisation Take loosely defined problems and...

Backend Engineer – C#, .Net, Azure | Financial Services | £600/day outside IR35| Hybrid We’re partnering with a leading financial services firm in the FinTech payment space that’s investing heavily in modernising its technology stack. With a new tech leader driving innovation, the focus is on building in-house systems that are scalable, reliable, and future-ready. About the Role Backend Engineer position You’ll take ownership of building and enhancing key client-facing applications using C#, .Net, Azure . As a Backend Engineer you will have tried and tested experience joining a FinTech/Financial Services company at the stage of 0-50 employees. This company is looking to grow significantly, building out 4 new engineering teams include Seniors and Team Leads. The work spans complex financial products, so you’ll have the chance to engage with both technical and business stakeholders across the UK. 💰 Paying up to £600 per day (Outside IR35) 🏢 1–2 days per week...

Outside IR35 Backend Software Engineer - MOD/Defence Project, Farnborough, Hybrid, £500-550 per day Contract opportunity for a Back End software engineer for a programme involving LLM. This is for a defence consultancy and security clearance (SC) would be needed prior to engagement. Due to the nature of the role, 1-3 days per week in Farnborough is needed. Key skills required Backed development experience (Mid-senior level) Python Data Pipeline Creation and Management API Creation and Integration Database Creation and Integration Working with JSON If you have worked in a security cleared environment, have the active relevant Security Clearance and skilled with Back End development - please apply.

Senior Full Stack Engineer (Backend Learning) | Contract Role | JavaScript/Typescript | B2C, Scale-up | Hybrid London | £500-550pd, Outside IR35 | 6 month Contract, likely extension We are working with a extremely fast growing and well recognised start-up who are looking for 2 Backend Leaning Full Stack Engineers with very strong typescript experience to work towards building out a new product with a rapidly scaling userbase. Urgently hiring for x2 Full stack engineers, experienced required: 6+ years experience working with JavaScript/TypeScript for fast growth product companies. Backend: Typescript, Node, Express, PostgreSQL Experience working with front-end Infrastructure: AWS ClickHouse desirable, but not required. Senior Full Stack Engineer (Backend Learning) | Contract Role | JavaScript/Typescript | B2C, Scale-up | Hybrid London | £500-550pd, Outside IR35 | 6 month Contract, likely extension * If interested, please apply here and we will reach...

Senior Full Stack Engineer (Backend Learning) | Contract Role | JavaScript/Typescript | B2C, Scale-up | Hybrid London | £500-550pd, Outside IR35 | 6 month Contract, likely extension We are working with a extremely fast growing and well recognised start-up who are looking for 2 Backend Leaning Full Stack Engineers with very strong typescript experience to work towards building out a new product with a rapidly scaling userbase. Urgently hiring for x2 Full stack engineers, experienced required: 6+ years experience working with JavaScript/TypeScript for fast growth product companies. Backend: Typescript, Node, Express, PostgreSQL Experience working with front-end Infrastructure: AWS ClickHouse desirable, but not required. Senior Full Stack Engineer (Backend Learning) | Contract Role | JavaScript/Typescript | B2C, Scale-up | Hybrid London | £500-550pd, Outside IR35 | 6 month Contract, likely extension * If interested, please apply here and we will reach...

Senior Full Stack Engineer (Backend Learning) | Contract Role | JavaScript/Typescript | B2C, Scale-up | Hybrid London | £500pd, Outside IR35 | 6 month Contract, likely extension We are working with a extremely fast growing and well recognised start-up who are looking for 2 Backend Leaning Full Stack Engineers with very strong typescript experience to work towards building out a new product with a rapidly scaling userbase. Urgently hiring for x2 Full stack engineers, experienced required: 6+ years experience working with JavaScript/TypeScript for fast growth product companies. Backend: Typescript, Node, Express, PostgreSQL Experience working with front-end Infrastructure: AWS ClickHouse desirable, but not required. Must have's are: Confidence with performing in Leetcode style interviews (Data Structures and Algorithms) A degree in Computer Science or Software Engineering related Senior Full Stack Engineer (Backend Learning) | Contract Role |...

X2 Senior Backend Engineer (Node) – 6-Month Contract (Extension Likely) - £600-£700 a day - OUTSIDE IR35 FRESH has partnered with a global online media and technology company that builds communities and products reaching 100's millions people annually across iGaming, Sports Betting, and Finance. What You’ll Be Doing Take technical ownership of core platforms (NextGen & MDM), the engines powering websites Lead on design, architecture, and best practice while mentoring other engineers Collaborate with Engineering, Delivery, and Product to deliver scalable, high-quality solutions Own and expand in-house HubSpot platform (30% focus), leading its maintenance, integration, and ongoing evolution Key skills you’ll bring: Strong experience with NodeJS/TypeScript Proficiency in SQL Solid experience with AWS Ability to effectively lead and collaborate with engineering teams Interested in hearing more, hit the apply button and I'll be in contact!...

IT | Typescript Engineer | £400p/d | Outside IR35 | 6 months | Fully Remote I am currently working with a Consultancy who are looking for a Backend Engineer to join a large organisation on a digital transformation project. The client is looking for someone that has very strong Typescript and AWS expertise and can scale Back End services, architecture, cloud-based solutions and API design. Skills: Typescript AWS Lambda ECS/EKS The interview process is 2 stages an will be next week. They want somebody to start ASAP so if you are available immediately please get in touch directly with your latest CV. IT | Typescript Engineer | £400p/d | Outside IR35 | 6 months | Fully Remote

Senior Backend Engineer - Golang experience is essential 6 month contract initially, Outside IR35, Fully remote role (UK/Europe) A leading global consumer technology company is building products that prioritise safety, equity, and meaningful user experiences. They are seeking a Senior Backend Engineer with strong technical judgment, a high sense of ownership, and the ability to drive work forward even when requirements are not fully defined. You’ll work primarily with Golang and GCP, helping to design, build, and evolve backend systems that support products used by millions of users worldwide. This role suits someone who thrives in ambiguity, executes with focus, and elevates teams through clarity, momentum, and example. What You’ll Do Design, build, and operate reliable, scalable backend services using Golang Own and evolve systems running on GCP, contributing to architecture, reliability, observability, and cost optimisation Take loosely defined problems...

Backend Engineer (.NET) – Contract (Outside IR35) | Immediate Start Location: South-West London (2 days per week onsite) Contract Length: 3 months initially, with strong possibility of extension Day Rate: Up to £500 (Outside IR35) We’re looking for experienced Backend Engineers to support the design and delivery of scalable, high-performance backend systems. You’ll work closely with frontend engineers, product managers, and other stakeholders to build and evolve APIs and services that underpin a modern, cloud-based platform. This is a hands-on contract role suited to someone who can hit the ground running in a fast-paced environment and contribute immediately to architecture, development, and problem-solving. What You’ll Be Doing Build and scale high-performance backend services and APIs Design robust .NET architectures for a cloud-based platform Write clean, testable, production-ready code Debug, troubleshoot, and optimise backend systems Work closely with...

Lead Backend Engineer - Architect - Series A consumer tech startup | 6-week critical delivery | London (Hybrid) | c£650 per day outside IR35 We're recruiting a senior backend engineer to own and build an entire backend system from the ground up. This is a full ownership role for someone who thrives under pressure and ships fast. The Challenge Our client has a working POC, but the backend is the blocker to launch. They need someone who makes architectural decisions autonomously, communicates clearly, and drives forward without waiting for consensus. You'll be building the foundation for a consumer product recommendation platform launching in 6 weeks. What You'll Own The entire backend system: data models, database architecture, APIs for mobile front-end, third-party AI integrations, data pipelines, security, and validation. You'll be the most senior backend engineer, driving technical decisions and pulling the team forward as the product evolves. This isn't...

Backend Engineer (.NET)- Contract (Outside IR35) Location: South West London Contract: 3 months initially, with strong extension potential, immediate start Rate: Up to £550 per day (Outside IR35) We’re seeking a number of experienced Backend Engineer (.NET) to help design and deliver scalable, high-performance backend systems for a modern, cloud-based platform. This is a hands-on contract role for someone who can hit the ground running in a fast-paced environment and contribute immediately to architecture, development, and problem-solving. Responsibilities Design and build robust, scalable backend services and APIs Develop clean, testable, production-ready code using C# and .NET Support integrations with frontend applications and third-party services Troubleshoot and resolve backend and system-level issues Optimise performance, availability, and reliability of services Collaborate with engineers, product managers, and stakeholders to deliver key...

Backend Engineer (.NET)- Contract (Outside IR35) Location: South West London Contract: 3 months initially, with strong extension potential, immediate start Rate: Up to £550 per day (Outside IR35) Overview We're seeking a number of experienced Backend Engineer (.NET) to help design and deliver scalable, high-performance backend systems for a modern, cloud-based platform. This is a hands-on contract role for someone who can hit the ground running in a fast-paced environment and contribute immediately to architecture, development, and problem-solving. Responsibilities Design and build robust, scalable backend services and APIs Develop clean, testable, production-ready code using C# and .NET Support integrations with frontend applications and third-party services Troubleshoot and resolve backend and system-level issues Optimise performance, availability, and reliability of services Collaborate with engineers, product managers, and stakeholders to...

Lead Backend Engineer - Architect - Series A consumer tech startup | 6-week critical delivery | London (Hybrid) | c£650 per day outside IR35 We're recruiting a senior Back End engineer to own and build an entire Back End system from the ground up. This is a full ownership role for someone who thrives under pressure and ships fast. The Challenge Our client has a working POC, but the Back End is the blocker to launch. They need someone who makes architectural decisions autonomously, communicates clearly, and drives forward without waiting for consensus. You'll be building the foundation for a consumer product recommendation platform launching in 6 weeks. What You'll Own The entire Back End system: data models, database architecture, APIs for mobile Front End, third-party AI integrations, data pipelines, security, and validation. You'll be the most senior Back End engineer, driving technical decisions and pulling the team forward as the product evolves. This isn't...

🚀 Senior Front-End Engineer – Investment Banking | £700-800 (Outside IR35) London / Hybrid (1 Day/Week in Office) 📅 Details Day rate: £700 - £800 p/d (OUTSIDE IR35) Location : London (Hybrid – 1 day/week in the office , rest flexible) Start Date : ASAP We are partnering with a global investment bank to hire a Senior Front-End Engineer to join a flagship team delivering a next-generation, single-page application (SPA) platform for high-performance derivatives trading. This is a high-profile role on a mission-critical, front-office system with exceptional technical standards. You’ll work at the cutting edge of financial technology, contributing to a modern, reactive web platform used across trading desks. This is not your typical enterprise UI – it’s fast, data-intensive, and built to scale with real-time demands in a trading environment. 💼 The Opportunity Collaborate with elite engineers on a SPA used across the investment bank for derivatives...

Data Platform Engineer I PostgreSQL I ADF I SQL Database I Schemas I Migration I Decommission I Financial Services I £500-£525 per day Outside IR35 12-month initial Hybrid Remote - London I'm working with a high-growth, product-led scale-up who are rebuilding their entire data layer in-house after moving away from their legacy systems and processes. They are in need of a hands-on Data Platform Engineer to design, build, and own a clean PostgreSQL-based backend data platform that powers the next phase of their growth. Must-Have PostgreSQL (design, modelling, optimisation) SQL and relational database engineering Building backend data services (APIs, views, pipelines, ETL/ELT) Data integration with operational systems ADF or similar orchestration tools Migrating/decommissioning legacy data platforms Nice-to-Have Experience in scale-ups or lean engineering teams Exposure to financial services Understanding of how front-end teams consume data...

Data Platform Engineer I PostgreSQL I ADF I SQL Database I Schemas I Migration I Decommission I Financial Services I £500- £525 per day | Outside IR35 | 12-month initial | Hybrid Remote - London I 'm working with a high-growth, product-led scale-up who are rebuilding their entire data layer in-house after moving away from their legacy systems and processes. They are in need of a hands-on Data Platform Engineer to design, build, and own a clean PostgreSQL-based backend data platform that powers the next phase of their growth. Must-Have PostgreSQL (design, modelling, optimisation) SQL and relational database engineering Building backend data services (APIs, views, pipelines, ETL/ELT) Data integration with operational systems ADF or similar orchestration tools Migrating/decommissioning legacy data platforms Nice-to-Have Experience in scale-ups or lean engineering teams Exposure to financial services Understanding of...