1 to 25 of 71 Permanent Senior Software Developer Jobs in London

Join Ten10 as a Senior Software Developer in Test Job Type: Permanent Location: London (Hybrid working with occasional client travel) Looking for your next challenge? At Ten10 , we’re transforming how businesses deliver quality software, and we’re looking for a passionate Senior Software Developer in Test to join our growing team. If … you’re a skilled developer with a love for testing and problem-solving, this is your chance to make a real impact. ️ Important: All applicants must be eligible for SC clearance. Not sure if you qualify? Check here: Eligibility for SC clearance Why Ten10? At Ten10, we’re proud to be one of the UK’s leading independent consultancies … for Quality Engineering, Software Testing, RPA, and DevOps. We bring together exceptional talent to deliver innovative solutions that help our clients release software faster and with confidence. Here’s why you’ll love being part of our team: Exciting Projects: Collaborate on challenging, impactful projects with a wide range of industries—from finance to government and beyond. Career More ❯

Senior Software Engineer – .NET/Event-Driven Systems (.NET Developer) 📍 Hybrid (UK-based, with 1 day in London) 💼 Full-Time | Permanent 💰 £75,000-£90,000 + benefits We’re partnering with a well-established and forward-thinking organisation operating at enterprise scale across insurance, claims management, and technology solutions. Their platforms underpin essential real-world services, and … they’re investing heavily in modern architecture and engineering excellence to scale and innovate further. As part of this continued growth, we’re looking for a skilled Senior Software Engineer with a strong background in .NET and modern backend architecture to join a high-performing engineering team. 🔧 What You'll Be Working On as a Software Engineer … .NET Developer) : You’ll play a key role in the design and development of scalable, event-driven systems that power core business operations. This is a hands-on engineering position in a tech-led environment, focused on clean code, solid architecture principles, and modern engineering practices. ✅ Key Skills & Experience of the Software Engineer (.NET Developer): .NET More ❯

Senior Software Engineer – .NET/Event-Driven Systems (.NET Developer) 📍 Hybrid (UK-based, with 1 day in London) 💼 Full-Time | Permanent 💰 £75,000-£90,000 + benefits We’re partnering with a well-established and forward-thinking organisation operating at enterprise scale across insurance, claims management, and technology solutions. Their platforms underpin essential real-world services, and … they’re investing heavily in modern architecture and engineering excellence to scale and innovate further. As part of this continued growth, we’re looking for a skilled Senior Software Engineer with a strong background in .NET and modern backend architecture to join a high-performing engineering team. 🔧 What You'll Be Working On as a Software Engineer … .NET Developer) : You’ll play a key role in the design and development of scalable, event-driven systems that power core business operations. This is a hands-on engineering position in a tech-led environment, focused on clean code, solid architecture principles, and modern engineering practices. ✅ Key Skills & Experience of the Software Engineer (.NET Developer): .NET More ❯

of sales coming from e-commerce. Technology plays a vital role in our business, supporting daily operations and driving growth through advanced solutions. We are seeking a cloud-savvy developer to join our engineering team. As we expand our cloud-based solutions, we need someone with expertise to contribute effectively. You will collaborate with talented business analysts, developers, quality … engineers, and support staff to ensure our online presence remains top-notch. As the Senior Developer, you will be responsible for developing and maintaining cutting-edge cloud solutions. You must have a passion for technology, exceptional problem-solving skills, and the ability to combine logical and analytical thinking with excellent interpersonal skills. We are looking for someone with … extensive software development experience who can work across departments to deliver high-quality software solutions. If you are a cloud-centric software developer eager to work in a fast-paced, innovative environment, we want you on our team. What You Will Do Participate in code reviews, testing, and debugging to ensure high-quality, reliable software More ❯

deployment of those applications - "You build it, you run it." What you will do: You will be using Scala, Akka, Kafka, Kinesis, and Dynamo to build and innovate our software that is distributed, reactive, and scalable. You will: Contribute to or lead a significant part of the implementation and deployment of services within your team. Work on challenging and … or at least an interest in functional programming Have experience with public cloud technologies - We use AWS Knowledge of applying object-oriented and functional programming styles to real-world software engineering problems. Experience creating scalable and reactive web applications with modern frameworks like Akka/play etc Desirable Skills: Experience with (or a willingness to learn) the Lightbend Reactive More ❯

Are you a senior software developer whose primary language is Golang? I have an opportunity to share with you. This company has demonstrated consistent growth and revenue for many years. They started with only 12 employees in 2000 and now have a team of over 7000 people. In 2022, they made a record-breaking £2.85 billion! As More ❯

x6 PHP Software Engineers/Backend Developers – PHP/Symfony/Restful API - Fintech start-up based in the UK 🌳🌳🌳 Areti has exclusively partnered with a Fintech start-up urgently seeking x6 PHP Software Engineers/Backend Developers for a Fintech start-up based in the UK. (FULLY REMOTE) My client has just received funding and looking to … grow its software engineering team from 20 to 30 in the next 2 months due to winning a number of projects. The ideal candidates will have a skillset to include the following. Background PHP Solid Design Principles - TDD, BDD Symfony Restful API Microservices MySQL Docker Containers AWS DataDog Cloud These roles will be working in one of the most … talented software engineering teams around and will offer the chance to move into a tech lead position very quickly. If you are a talented developer looking for a company that offers fully remote working, then please send your cv to me today. I have interview slots already pre-booked so suitable candidates will be interviewed this week with More ❯

x6 PHP Software Engineers/Backend Developers – PHP/Symfony/Restful API - Fintech start-up based in the UK 🌳🌳🌳 Areti has exclusively partnered with a Fintech start-up urgently seeking x6 PHP Software Engineers/Backend Developers for a Fintech start-up based in the UK. (FULLY REMOTE) My client has just received funding and looking to … grow its software engineering team from 20 to 30 in the next 2 months due to winning a number of projects. The ideal candidates will have a skillset to include the following. Background PHP Solid Design Principles - TDD, BDD Symfony Restful API Microservices MySQL Docker Containers AWS DataDog Cloud These roles will be working in one of the most … talented software engineering teams around and will offer the chance to move into a tech lead position very quickly. If you are a talented developer looking for a company that offers fully remote working, then please send your cv to me today. I have interview slots already pre-booked so suitable candidates will be interviewed this week with More ❯

Vacancy for Senior Software Developer at The National Archives Vacancy for Senior Software Developer at The National Archives 21 May 2021 Richmond upon Thames, London Full-Time Do you have a passion for delivering creative, user focused digital services to a global audience of millions? Would you enjoy working as part of a multi … in the world. We are exploring new approaches and tools, simplifying key transactions and finding new ways to help people to use our collections. We are looking for a Senior Software Developer with extensive experience working within the Django web and rest frameworks and ideally with Wagtail CMS development experience. Initially you will work with our contracted … pipelines would be helpful but not essential as we will provide training in those. Our developers have a vital role to play in growing our DDaT capability. In this senior role you will demonstrate excellent software development, interpersonal and team-working skills. You will also have a willingness to learn new skills across a range of technologies, and More ❯

will be part of a vibrant, fast-moving environment where the customer truly comes first, and innovation is at the core of everything. Our client is looking for a Senior Developer that will help support them to build and release engaging, innovative applications to market quickly. Key Responsibilities: Implement technical solutions that are resilient, scalable and manageable Coach More ❯

will be part of a vibrant, fast-moving environment where the customer truly comes first, and innovation is at the core of everything. Our client is looking for a Senior Developer that will help support them to build and release engaging, innovative applications to market quickly. Key Responsibilities: Implement technical solutions that are resilient, scalable and manageable Coach More ❯

that do more than just monitor and recommend. With the power of advanced machine learning, the platform automatically scales clusters, significantly reducing cloud spend while improving performance, reliability, and developer productivity. If you love solving complex problems and want to make a real impact in the cloud industry, this is the role for you. As a software developer More ❯

Senior Full Stack Software Developer Tech : AWS Lambda, React with Next.js, TypeScript, Node.js, and Terraform Why? start-up financial services, revolutionising the industry Location : Hybrid - 2-3 days in the office (London) Salary : £80k - £95k + benefits Our Client A new UK-based financial services provider is launching a credit card offering aimed at delivering fair, flexible … and user-friendly financial products to consumers. The organisation is committed to empowering individuals by enhancing their understanding and control of personal finance through clarity, intelligence, and technology. Senior Full Stack Software Developer - Responsibilities Collaborate with Product Owners to ensure that the technical roadmap aligns with the product vision. Actively participate in product planning meetings and provide … Terraform. Provide technical guidance and mentorship to junior developers. Stay up-to-date with new technology trends, applications, and protocols. Contribute to the development of technical documentation and standards. Senior Full Stack Software Developer - Experience Required Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field, or equivalent experience Proven experience as a More ❯

Social network you want to login/join with: Sr. Software Engineer - Integrations and Developer Experience, London col-narrow-left Client: Addepar Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: f83fe8c5064e Job Views: 9 Posted: 29.06.2025 Expiry Date: 13.08.2025 col-wide Job Description: Sr. Software Engineer - Integrations and … Developer Experience Who We Are Addepar is a global technology and data company that helps investment professionals provide the most informed, precise guidance for their clients. Hundreds of thousands of users have entrusted Addepar to empower smarter investment decisions and better advice over the last decade. With client presence in more than 50 countries, Addepar's platform aggregates portfolio … market, and client data for over $7 trillion in assets. Addepar's open platform integrates with more than 100 software, data, and services partners to deliver a complete solution for a wide range of firms and use cases. Addepar embraces a global flexible workforce model with offices in New York City, Salt Lake City, Chicago, London, Edinburgh, Pune, and More ❯

Senior Software Engineer 4 days a week onsite - London - up to £100k DOE We are looking for a talented Developer to join our client, a leading company focused on delivering high-quality software solutions. This innovative organisation excels in creating effective solutions while navigating the complexities of high-throughput systems. In this role, you will create … effective software designs based on product requirements, producing well-structured and testable code. You will apply industry best practices and internal standards to ensure that solutions are performant and observable through metrics and monitoring. Balancing technical solutions with commercial constraints is essential as you provide technical mentorship to less experienced team members. You will scope and estimate work, delivering … to-end, including in production, while demonstrating the ability and willingness to adapt to technical changes. Who We Are Looking For: At least 5 years of experience as a Developer Strong knowledge of modern PHP 8+ (Laravel/Symfony) Proficiency in JavaScript/TypeScript, NestJS and ReactJS Experience building platforms using event-based architecture and CQRS Familiarity with AWS More ❯

Senior Software Engineer 4 days a week onsite - London - up to £100k DOE We are looking for a talented Developer to join our client, a leading company focused on delivering high-quality software solutions. This innovative organisation excels in creating effective solutions while navigating the complexities of high-throughput systems. In this role, you will create … effective software designs based on product requirements, producing well-structured and testable code. You will apply industry best practices and internal standards to ensure that solutions are performant and observable through metrics and monitoring. Balancing technical solutions with commercial constraints is essential as you provide technical mentorship to less experienced team members. You will scope and estimate work, delivering … to-end, including in production, while demonstrating the ability and willingness to adapt to technical changes. Who We Are Looking For: At least 5 years of experience as a Developer Strong knowledge of modern PHP 8+ (Laravel/Symfony) Proficiency in JavaScript/TypeScript, NestJS and ReactJS Experience building platforms using event-based architecture and CQRS Familiarity with AWS More ❯

build and maintain business continuity functions and a growing set of ecosystem integrations. Our database deploys both on-premises and in the cloud. We are looking for a motivated software engineer to work in our core database team in areas such as query execution, performance optimization, cluster management, addition of semantic search capabilities and efficient storage of document embeddings. … You'll have the opportunity to work in all areas of our software stack which includes almost every aspect of computer science - from hardware to operating systems and user interfaces and everything in between. You’re a computer scientist who loves algorithms, massively parallel programming, multicore architecture and performance optimizations. You find compilers, parsers, grammars and compilers interesting, you … develop, test and ship improvements to our core query execution stack Help troubleshoot and fix issues encountered in the field Qualifications 4-6 years of experience developing and shipping software that users are successfully running in production. High performance parallel, distributed systems Fundamental computer science – as many of these as possible: Hashing, sorting, searching, aggregation Indexing Distributed database algorithms More ❯

maintain test frameworks for automation Participate in team planning Help improve automation frameworks Provide mentorship, training, and support to other team members Conduct code reviews About you As a senior SDET for this scale-up communications SaaS business, you should have a variety of skills to succeed in the role: 8 years of experience in software testing More ❯

Job Description - Software Developer - C# (15997) Job Description Software Developer - C# ( 15997 ) Description We have a fantastic new opportunity for a Software Developer to join our agile team and have a direct impact on our Revenue Management System (RMS). Our RMS sets and optimises ticket and ancillary prices which helped the business secure … is a full stack role and you'll primarily be working towards the modernisation of our revenue platform and working in AWS. You'll be joining a small friendly software development team and taking part ownership of the development of the next iteration our RMS system whilst maintaining the high standards of our legacy systems during the transition What … you'll be doing Deliver high quality, cost-effective software solutions within the Revenue Management System (RMS) eco-system, in line with easyJet standards and best practices. Support the Software Development Life Cycle (SDLC) including analysis, design, development, testing, deployment and production support. Ensure compliance with the SDLC including architectural and security standards. Understand Agile software development More ❯

TypeScript/React CI/CD - GitHub/CircleCI Cloud – AWS Requirements Bachelor's degree with a minimum of 2:1 Computer Science, Information Technology, or a related field. Senior level experienced developer. Demonstrable success and involvement in software design and implementation of production-ready backend solutions. Strong experience with relational databases such as PostgreSQL, SQL Server, or More ❯

My client, a global fintech company disrupting the world of embedded finance, is seeking a Senior Software Developer to join their team. This is paying a market leading salary + benefits. It is a hybrid role and you will need to be in their Atlanta office 1-2 days per week (Remote will also be considered). … Company overview A global embedded financing platform for many of the world’s leading e-commerce sites, tech companies, and payment services providers. Their software platform and APIs enable our partners to offer flexible financing products, in their desired branding, to their merchant base. Role overview We are seeking a Senior Software Developer with expertise in More ❯

Senior Lead Software Engineer - Front-End Developer Join to apply for the Senior Lead Software Engineer - Front-End Developer role at JPMorganChase Job Description Be an integral part of a team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products. As a Senior Lead Software Engineer … capabilities and contributions, and apply deep technical expertise and problem-solving methodologies to tackle a diverse array of challenges that span multiple technologies and applications. Job Responsibilities Execute creative software solutions, design, develop, and troubleshoot technical issues with the ability to think beyond routine approaches to build solutions or analyze technical problems. Develop secure, high-quality production code, review More ❯

effectively handling maintenance and operational requirements, such as technical debt & sensible levels of documentation. Using your expertise and experience to mentor and coach others. What we value in a developer: We're looking for significant experience with one or more OO programming languages (we’re primarily C# .Net & Node.js, but happy to consider candidates with experience from other backgrounds … working in a highly collaborative environment and enjoy pairing and mobbing. Our interview is designed to remove bias and is focused on the competencies of the role of a developer here. We don't expect you to do offline work or to spend hours preparing! We ask questions related to your knowledge and experience, will work through a paired More ❯

Join to apply for the Senior Software Developer role at Tecnitex Industrial Ltda. 3 weeks ago Be among the first 25 applicants Join to apply for the Senior Software Developer role at Tecnitex Industrial Ltda. Senior Software Developer (PYTHON/AWS/REACT) - Health tech - tech for good, make a positive … impact on the world Highly successful and fast growing organisation has an exciting opportunity for a Senior Software Developer (PYTHON/AWS/REACT). They are looking for a talented individual who will design, implement, and maintain their publishing software, systems, and customer-facing digital products. Requirements Design and implement systems and software to … creation of high-quality code by commitment to practices such as test-driven development, pair programming and code review. Be responsible for the technical development of all stages of software creation, including testing; ensure that implementation meets security, performance, and safety requirements. Suggest improvements to the code base, development processes, tooling and working practices. Encourage innovation by identifying, evaluating More ❯

Senior Software Developers We are seeking Senior Software Developers for an excellent client in the trading industry, based in the City of London. The successful candidate will join a small, talented development team, working on creating and maintaining applications within a C#/.NET/SQL Server/ASP.NET environment. Many projects are greenfield, offering the … opportunity to make a significant impact early on. You will work with the latest technologies and be expected to produce high-quality code for in-house software applications, with a high degree of autonomy. The client provides a collaborative working environment, with most team members from strong educational backgrounds. The company operates within the sports trading industry, so familiarity More ❯