101 software engineer jobs found

General Dynamics Mission Systems engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation. With a global team of more than 13,000 top professionals, we partner with the best in industry to expand the bounds of innovation in the defence and scientific arenas. In the UK, we are leading the way in avionics and communication systems. Given the nature of our work and who we are, we value trust, honesty, alignment and transparency. General Dynamics in St Leonards-on-Sea currently provide avionic mission computing systems for a wide range of military fast jets, helicopters, and UAV’s. Recent success has resulted in General Dynamics developing the next generation of Advanced High Performance, Safety Critical Mission Computer Systems to meet the needs of latest platforms in development by several aircraft manufacturers. These Mission Computing Systems provide the...

Opportunity for a Principal Software Engineer to work for a retail company at the beginning of a large digital transformation on an initial 6-month contract outside IR35. You'd report to the Head of Engineering and would work as part of a team of Principal Software Engineers responsible for collaborating with Architects and Product Owners to lead the re-architecture of existing platforms to a cloud click apply for full job details

Senior Software Engineer (Contract) - HealthTech - Fully remote (UK) Up to £500 p/day Outside IR35 Location: Fully remote working (must be UK based) Senior Software Engineer (Python/JavaScript) - would you like the opportunity to work for a leading HealthTech organisation? They’re currently hiring for a Senior Software Engineer, where you will be joining a high-performing and dynamic team. You will play a crucial role in the entire lifecycle of their web applications, from initial design and development to ongoing maintenance and improvement As a Senior Software Engineer, you will get a lot of responsibility and have a significant impact on their products, while also having the opportunity to mentor junior members of the team. Key requirements: Strong experience with Python and JavaScript Experience with Flask or Django would be a huge bonus. Hands-on experience with cloud platforms (AWS, GCP or Azure). Expert in a modern JavaScript framework, ideally...

Project is integration multiple 3rd party services into a financial services platform. Looking for front end (React Native) or Back end (.net) experience (Or both) Start date ASAP Duration 3 months (Likely to extend) 2 days / week in person working (London) Joining a cross functional team of 12 Immediate Interviews     The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages.     Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning.     We are based at Old Street in the heart of "tech city" and get thoroughly stuck in with the...

Full Stack Software Engineer (AI/ML Platform) Location: London (Hybrid/On-site as needed) Rate: Up to £650 per day Contract: Outside IR35 Positions: 2 roles available SR2 are working with a fast-growing AI scale-up in London that's building next-generation machine learning platforms used at serious scale. They're looking for two experienced Full Stack Software Engineers to help design, build, and scale production-grade AI-driven systems. What you'll be working on Building high-performance, user-facing applications using React and TypeScript Designing and developing scalable Python backends powering ML-driven products Integrating machine learning models into real-world production systems Working on data pipelines, inference services, and model-serving APIs Improving system performance, reliability, and scalability in a fast-moving environment Shipping features quickly while maintaining clean, testable, production-quality code Core tech stack Frontend React...

Embedded Software Engineer Cambridge | Outside IR35 | £550 per day | Onsite / Hybrid This is a specialist contract for an embedded engineer who knows how to work in regulated, safety-critical environments . You’ll support the development and certification of embedded software aligned to DO-178 standards, contributing to systems where assurance, traceability and correctness are as important as the code itself. The business operates in a low-ego, technically rigorous environment and values engineers who can balance compliance with pragmatic delivery. What you’ll be doing Developing and verifying embedded software in line with DO-178 (B or C) Producing certification-ready artefacts and documentation Working closely with systems, verification and quality teams Supporting audits, reviews and certification activities What you’ll bring Proven experience delivering software under DO-178 Strong embedded C/C++ background Comfortable with...

TL;DR We're looking to hire 5 Senior Ruby Software Engineers for a number of business critical projects. 3 month initial contract, may extend Fully remote Outside IR35 Immediate start About Us At Henry Schein One UK, we are a tech company with a mission to redefine dental care, creating a future where personalised, AI-driven treatment and intelligent practice management come together to enhance patient care and build a thriving dental practice. We’re innovators, relentless in our pursuit of customer success and constantly pushing the boundaries of the possible to create world-class SaaS products. Culture matters to us. Celebrated as one of the ‘Sunday Times UK's Best Places to Work’ companies, our culture as an inclusive and forward-thinking company means we are committed to creating an environment that values diversity and flexibility and promotes equal opportunities for everyone. What We Do...

Opportunity for a Principal Software Engineer to work for a retail company at the beginning of a large digital transformation on an initial 6-month contract outside IR35. You'd report to the Head of Engineering and would work as part of a team of Principal Software Engineers responsible for collaborating with Architects and Product Owners to lead the re-architecture of existing platforms to a cloud click apply for full job details

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.

Job Title: Contract Embedded Engineer Location: Outskirts of Basildon (two days per week required on-site) Rate: up to £57pphr (outside of IR35) Duration: 6 months+ Overview: As part of the embedded engineering team, you will help develop next-generation embedded automation solutions. The role involves designing, developing, and maintaining Linux platforms on ARM-based microprocessors for reliable operation in harsh environments. You will collaborate with cross-functional teams to define specifications, deliver the product, and support its release. Knowledge needed:- 7+ years of Advanced C++- object-oriented (OOP) concepts- Experience with cross-compiling, GDB, JTAG.- Microprocessor and microcontroller architectures like Cortex-A series, ARM series, and other general-purpose microcontrollers.- Multi-threaded applications and IPC.- Good experience with Linux-Scripting languages like Shell script/Python.-Experience with communication protocols such as CAN, I2C, SPI, Serial/TCP IP....

Principal Software Engineer (React & Java) – Contract Rate: Up to £700/day (Outside IR35) Location: UK Remote / Hybrid (Public Sector) Duration: Initial 6 months Clearance: SC eligible (active not required) Notice: Under 1 month preferred We’re working with a consultancy delivering a large-scale cloud transformation and modernisation programme across a public sector application portfolio. The focus is on modernising legacy systems, enabling cloud-native services, and laying the groundwork for AI and generative capabilities , all within AWS. They’re looking for a Principal-level Software Engineer who can operate as a hands-on technical leader. The Role Lead a small team of contractors (2+ already in place) Drive technical direction across React and Java-based services Hands-on delivery (approx. 80% engineering / 20% leadership ) Own design decisions, code quality, and best practices Contribute to modernisation strategy and cloud-native...

Principal Software Engineer (React & Java) - Contract Rate: Up to £700/day (Outside IR35) Location: UK Remote/Hybrid (Public Sector) Duration: Initial 6 months Clearance: SC eligible (active not required) Notice: Under 1 month preferred We're working with a consultancy delivering a large-scale cloud transformation and modernisation programme across a public sector application portfolio. The focus is on modernising Legacy systems, enabling cloud-native services, and laying the groundwork for AI and generative capabilities , all within AWS. They're looking for a Principal-level Software Engineer who can operate as a hands-on technical leader. The Role Lead a small team of contractors (2+ already in place) Drive technical direction across React and Java-based services Hands-on delivery (approx. 80% engineering/20% leadership ) Own design decisions, code quality, and best practices Contribute to modernisation strategy and cloud-native...

AI Software Engineer - Contract (SC Cleared) Location: London (Hybrid Working) Contract: Outside IR35 Clearance: Active SC Clearance required Email : Phone : Overview We are seeking an experienced AI Software Engineer to join a high-impact programme based in London , working on cutting-edge AI and LLM-driven solutions. This is an outside IR35 contract offering hybrid working , ideal for contractors with strong experience building production-grade AI systems in cloud environments. You will play a key role in designing, developing, and deploying AI-powered applications using modern frameworks and cloud-native technologies. Key Responsibilities Design and develop AI-driven applications using LLMs and agent-based architectures Build and integrate workflows using LangChain and/or LangGraph Develop robust backend services using Python Contribute to frontend or full-stack...

CONTRACT SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW CONTRACT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Senior Software Engineer Globally leading defence / cyber security company £500 - £750 per day (inside and outside IR35 roles available) London based organisation in an easily accessible location Contract Senior Software Engineer To apply please call or email WHO WE ARE? We are recruiting multiple contract Senior Software Engineers to work with various clients in London ranging from R &D companies, Multi-National Consultancies to SME 's and product based companies. Due to the nature of the work these clients do, you must hold enhanced DV Security Clearance. WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING? As a Senior Software Engineer, you will work with an experienced agile team to design and deliver...

Overview: Expleo is a trusted partner for end-to-end, integrated engineering, quality services and management consulting for digital transformation. We help businesses harness unrelenting technological change to successfully deliver innovations that will help them gain a competitive advantage and improve the everyday lives of people around the globe. The Electronics & Embedded Systems (EES) business unit has world class experts in the provision of real-time embedded systems, specialising in safety critical control systems. To continue to grow the business we are now looking for an experienced Software Engineer (C++) to join our growing team. We are a key supplier to a number of the largest defence suppliers in the UK. Opportunities are on both Permanent and Contractor (Insider & Outside IR35) working basis, typically with 3 days onsite in Stevenage, though you must be prepared for travel to client location. Responsibilities: EE requirements content, and...

Expleo is a trusted partner for end-to-end, integrated engineering, quality services and management consulting for digital transformation.  We help businesses harness unrelenting technological change to successfully deliver innovations that will help them gain a competitive advantage and improve the everyday lives of people around the globe. The Electronics & Embedded Systems (EES) business unit has world class experts in the provision of real-time embedded systems, specialising in safety critical control systems. To continue to grow the business we are now looking for an experienced Software Engineer (C++) to join our growing team. We are a key supplier to a number of the largest defence suppliers in the UK. Opportunities are on both Permanent and Contractor (Insider & Outside IR35) working basis, typically with 3 days onsite in Stevenage, though you must be prepared for travel to client location. Responsibilities EE requirements content, and...

Full job description Overview: Expleo is a trusted partner for end-to-end, integrated engineering, quality services and management consulting for digital transformation. We help businesses harness unrelenting technological change to successfully deliver innovations that will help them gain a competitive advantage and improve the everyday lives of people around the globe.   The Electronics & Embedded Systems (EES) business unit has world class experts in the provision of real-time embedded systems, specialising in safety critical control systems. To continue to grow the business we are now looking for an experienced Software Engineer (C++) to join our growing team.   We are a key supplier to a number of the largest defence suppliers in the UK. Opportunities are on both Permanent and Contractor (Insider & Outside IR35) working basis, typically with 3 days onsite in Stevenage, though you must be prepared for travel to client location....

Contract Front End Software Engineer Outside IR35 3 months contract Remote About the Role We are seeking an experienced Contract Front End Software Engineer to join an expanding Manchester-based engineering team. This role offers an exciting opportunity to work on a cutting-edge platform, building scalable and intuitive user interfaces click apply for full job details

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!...

Role: Expert .NET Developer – Cross Asset Trading System Location: Very Flexible. Can offer Remote with occasional travel to London City offices Contract: 12 months Rate: Up to £750/day (OUTSIDE IR35) About the Role: We are partnering with a leading investment bank on an ambitious programme to modernise and enhance their cross-asset trading systems. This is a technically challenging, hands-on role, ideal for an expert .NET developer with a strong SQL Server background and experience working in financial environments. You will be joining a highly skilled team focused on performance, reliability, and scalability, tackling complex issues in real-time, data-driven applications. This is purely a tech-heavy role—business knowledge is helpful but not required. What You’ll Be Doing: Design, develop, and maintain RESTful APIs using .NET technologies (C#, ASP.NET Core). Redesigning and refactoring high-activity tables to improve performance and...