128 software engineer jobs found in London

Senior Software Engineer - Outside IR35 - Contract - Current SC Essential   We're hiring a Senior Software Engineer to join a high-impact government programme of work. This is an outside IR35 contract with a strong potential for extension beyond the initial 6-month term, making it a great opportunity for experienced contractors looking for stability and interesting work.   The project sits within a complex, delivery-focused environment where your engineering decisions will genuinely matter. You'll be working as part of a collaborative team building robust, scalable solutions for a public sector client.   Tech Experience: Java, Spring Boot, Typescript and React.   £550 per day outside IR35   Start date: 28/04/2026 End date: 30/10/2026   About Softwire   Softwire is a leading UK technology and strategy consultancy. From enterprise to government, we help visionary organisations turn...

We are urgently looking for experienced candidates with strong hands-on Java development skills and design experience. While an architect title is not mandatory, we are particularly interested in profiles of senior developers with solid technical expertise. Required Core Skills: - Java - Python - GoLang -Design, develop, and maintain high-quality Java applications. -Write clean, efficient, and well-documented code. -Perform code reviews and optimize existing codebases. -Ensure application performance and reliability. -Develop and maintain automated tests to ensure code quality. -Work with CI/CD pipelines to streamline the development and deployment process. Job Types: Full-time, Freelance Pay: £350.00-£370.00 per day Schedule: Monday to Friday Experience: Java: 7 years (required) Python: 3 years (required) Go: 2 years (required)

Working at CreateFuture CreateFuture  is an  AI-native consulting partner  where people do work that matters and are supported to do it well. We work alongside organisations such as PayPal, adidas, NatWest, FanDuel and Money Saving Expert, building digital products and services that make a difference  while always putting people first. We’re a team of creators. We write code, shape delivery, build go-to-market strategies, develop AI solutions and create the practices that support our people. We work side by side with our clients, challenging what’s not  Lead Software Engineer (Salesforce / Java) – Contract Role Overview Lead engineering work focused on  Salesforce platform refactoring and backend process improvements Improve  integration architecture and system reliability Drive  modern engineering practices , including CI/CD and automated testing Support...

Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Emphasis on Architecture over Development (Must have a solid Development Background) Must be comfortable sitting in client meetings and advising Start date ASAP Duration 3 months (Likely to extend) 3 days / week in person working (London) 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"...

About the Role: We are seeking an experienced Senior Software Developer to join our consultancy team, supporting a leading Global banking client. The successful candidate will play a key role in the development and delivery of a new internal Risk Weighted Assets system, working closely with quantitative analysts and engineering teams in a fast-paced, high-performance environment. Key Responsibilities: Develop, and maintain RWA systems for a Tier 1 banking client. Collaborate closely with quantitative analysts (quants) to translate risk models into robust, production-grade software. Architect and deliver high-volume, containerised messaging systems to support Real Time data flows. Contribute to the full software development life cycle, including design, implementation, testing, deployment, and support. Ensure solutions are scalable, resilient, and aligned with enterprise architecture standards. Participate in Agile ceremonies and contribute to...

Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Emphasis on Architecture over Development (Must have a solid Development Background) Must be comfortable sitting in client meetings and advising Start date ASAP Duration 3 months (Likely to extend) 3 days / week in person working (London) 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 ʺtech cityʺ...

We are urgently looking for experienced candidates with strong hands-on Java development skills and design experience. While an architect title is not mandatory, we are particularly interested in profiles of senior developers with solid technical expertise. Required Core Skills: - Java - Python - GoLang -Design, develop, and maintain high-quality Java applications. -Write clean, efficient, and well-documented code. -Perform code reviews and optimize existing codebases. -Ensure application performance and reliability. -Develop and maintain automated tests to ensure code quality. -Work with CI/CD pipelines to streamline the development and deployment process. Job Types: Full-time, Freelance Pay: £350.00-£370.00 per day Schedule: Monday to Friday Experience: Java: 7 years (required) Python: 3 years (required) Go: 2 years (required)

Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Emphasis on Architecture over Development (Must have a solid Development Background) Must be comfortable sitting in client meetings and advising Start date ASAP Duration 3 months (Likely to extend) 3 days / week in person working (London) 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 ʺtech cityʺ...

We are urgently looking for experienced candidates with strong hands-on Java development skills and design experience. While an architect title is not mandatory, we are particularly interested in profiles of senior developers with solid technical expertise. Required Core Skills: - Java - Python - GoLang -Design, develop, and maintain high-quality Java applications. -Write clean, efficient, and well-documented code. -Perform code reviews and optimize existing codebases. -Ensure application performance and reliability. -Develop and maintain automated tests to ensure code quality. -Work with CI/CD pipelines to streamline the development and deployment process. Job Types: Full-time, Freelance Pay: £350.00-£370.00 per day Schedule: Monday to Friday Experience: Java: 7 years (required) Python: 3 years (required) Go: 2 years (required)

Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Emphasis on Architecture over Development (Must have a solid Development Background) Must be comfortable sitting in client meetings and advising Start date ASAP Duration 3 months (Likely to extend) 3 days / week in person working (London) 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...

Senior Software Engineer – Java (Contractor) Outside IR35 Rate: £400 - £500 per day Duration: 3 Months Plus Start Date: ASAP   As a Senior Software Engineer (Java) – Contractor at Pulselive, you’ll be focused on delivering robust, high-performance backend services and APIs that power digital experiences for millions of sports fans globally. This role is ideal for an experienced, hands-on engineer with strong Java and Spring expertise who thrives in a collaborative and fast-paced delivery environment. You’ll work closely with cross-functional teams to build, integrate, and optimize systems that handle real-time sports data, video, and live commentary. This position is project- and delivery-focused, with no line management or people-leadership responsibilities required.   Key Responsibilities: Design and develop scalable backend systems using Java and Spring Boot...

Job Title: Software Engineer Job Location: Canary Wharf (4 Days in the office/ 1 from home) Contract Length: 12 Months Industry: Oil and Energy, Tech, Trading Working Hours: 8 per day/40 per week Role Overview: This role is required for bp’s Trading unit in UK where the person will be working as part of a large program aiming to deliver advanced Data & AI technology solutions to the front office.   What you will have: STEM Degree Design, build, and operate cloud native software platforms to deploy and scale chatbot solutions, using Python, REST APIs, Docker, and Kubernetes on Azure and/or AWS. Implement production grade engineering practices, including CI/CD pipelines, infrastructure as code, security, authentication, monitoring, and cost efficient operations. Collaborate with data scientists and ML engineers to integrate LLM-backed services into reliable, secure, and maintainable software systems....

Senior Software Engineer – Java (Contractor) Outside IR35 Rate: £400 - £500 per day Duration: 3 Months Plus Start Date: ASAP   As a Senior Software Engineer (Java) – Contractor at Pulselive, you’ll be focused on delivering robust, high-performance backend services and APIs that power digital experiences for millions of sports fans globally. This role is ideal for an experienced, hands-on engineer with strong Java and Spring expertise who thrives in a collaborative and fast-paced delivery environment. You’ll work closely with cross-functional teams to build, integrate, and optimize systems that handle real-time sports data, video, and live commentary. This position is project- and delivery-focused, with no line management or people-leadership responsibilities required.   Key Responsibilities: Design and develop scalable backend systems using Java and Spring Boot...

Senior Embedded Software Engineer (Contractor) Employment Type: Contract (Ltd) Company Description 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...

Embedded Software Engineer Education Bachelor’s/Master’s in Electronics & Communication Engineering. Core Skills Good proficiency in Embedded C and C++ . Hands-on experience with at least one of the Micro-Controllers such as STM32, NXP, MicroChip, AVR, or ESP32. Understanding of Real-Time Operating Systems and development on bare metal. Ability to implement and debug communication protocols like I2C, SPI, UART, and CAN. Could understand and read Schematics and datasheets. Experience using GDB/JTAG/SWD debuggers, and Logic Analyzers/Oscilloscopes. Note : Position offers a competitive salary or day rate, available as permanent or contract roles (outside IR35).

UAV - Software Integration Engineer. Remote (UK Work Eligibility Required) Occasional travel in England for flight tests and hardware integration. Contract: Initially ~12 weeks (extension likely) Rate: £25-£40 per hour, depending on experience. Time: Flexible/part-time OK (deliverables matter more than hours) ✈ What you’ll do. We’re looking for a software engineer to support the development of a large (>25kg) unmanned aircraft. You will mostly be working around ArduPilot and Mission Planner. This is an MVP-style role: build, test, iterate, and keep things moving with minimal meetings. You’ll start with smaller, well-defined tasks while you ramp up, then take on more complex integrations with more independence as you understand the project’s architecture. ✈ Typical tasks. Depending on your strengths, you’ll get to work on some of the following: - Extend Mission Planner - Added...

UAV - Software Integration Engineer. Remote (UK Work Eligibility Required) Occasional travel in England for flight tests and hardware integration. Contract: Initially ~12 weeks (extension likely) Rate: £25-£40 per hour, depending on experience. Time: Flexible/part-time OK (deliverables matter more than hours) ✈ What you’ll do. We’re looking for a software engineer to support the development of a large (>25kg) unmanned aircraft. You will mostly be working around ArduPilot and Mission Planner. This is an MVP-style role: build, test, iterate, and keep things moving with minimal meetings. You’ll start with smaller, well-defined tasks while you ramp up, then take on more complex integrations with more independence as you understand the project’s architecture. ✈ Typical tasks. Depending on your strengths, you’ll get to work on some of the following: - Extend Mission Planner - Added...

UAV - Software Integration Engineer. Remote (UK Work Eligibility Required) Occasional travel in England for flight tests and hardware integration. Contract: Initially ~12 weeks (extension likely) Rate: £25-£40 per hour, depending on experience. Time: Flexible/part-time OK (deliverables matter more than hours) ✈ What you’ll do. We’re looking for a software engineer to support the development of a large (>25kg) unmanned aircraft. You will mostly be working around ArduPilot and Mission Planner. This is an MVP-style role: build, test, iterate, and keep things moving with minimal meetings. You’ll start with smaller, well-defined tasks while you ramp up, then take on more complex integrations with more independence as you understand the project’s architecture. ✈ Typical tasks. Depending on your strengths, you’ll get to work on some of the following: - Extend Mission Planner - Added...

UAV - Software Integration Engineer. Remote (UK Work Eligibility Required) Occasional travel in England for flight tests and hardware integration. Contract: Initially ~12 weeks (extension likely) Rate: £25-£40 per hour, depending on experience. Time: Flexible/part-time OK (deliverables matter more than hours) ✈ What you’ll do. We’re looking for a software engineer to support the development of a large (>25kg) unmanned aircraft. You will mostly be working around ArduPilot and Mission Planner. This is an MVP-style role: build, test, iterate, and keep things moving with minimal meetings. You’ll start with smaller, well-defined tasks while you ramp up, then take on more complex integrations with more independence as you understand the project’s architecture. ✈ Typical tasks. Depending on your strengths, you’ll get to work on some of the following: - Extend Mission Planner - Added functionalities for operator workflows....

Mindera are currently looking for a Software Deployment Engineer to deliver, configure, test, and roll out software and device solutions across multiple environments. You'll work closely with software engineers, product teams, and platform specialists to ensure seamless deployments that support millions of customers and thousands of colleagues. This role is perfect for someone who enjoys hands-on deployment, automation, configuration, testing, and troubleshooting across a wide technology landscape. This is a hybrid position where you will be expected to be onsite in Bracknell 3 days per week. Requirements Deployment & Configuration (Primary Focus) • Deploy application releases across Dev, Test, UAT, Pre-Prod, and Production environments. • Configure applications, services, and devices according to environment needs. • Automate deployment activities through CI/CD pipelines and scripting. • Manage deployment schedules, releases, and...