Find Your Dream Backend Job in United Kingdom

Job Title: Backend Golang Developer / Backend Developer / Go Developer Location: Bristol (Hybrid 2 days in-office) Type: Permanent Salary: Competitive + Bonus + Share Scheme + Benefits

Join one of the UKs most innovative digital companies as a Backend Golang Developer. This is a fantastic opportunity for an experienced or aspiring Back End Developer who wants to design scalable, secure, and high-perf click apply for full job details

Backend Software Engineer / Developer London onsite to £160k

Are you a Java technologist with strong knowledge of software engineering best practices and backend development experience looking for an opportunity to progress your career in a senior, hands-on role with complex and challenging work?

You could be joining a scaling Cyber Security technology company that has just received £100 million investment.

As a Backend Software Engineer you'll join a small, Agile team using core Java within a TDD environment deploying to AWS. You'll design and develop new features and enhancements across two security product areas, working across the full development lifecycle; you'll be able to input ideas and have your voice heard in a collaborative team environment that encourages knowledge sharing.

Location:

You'll join colleagues in amazing offices in London five days a week with a wide range of facilities and an array of perks including free, chef cooked meals.

About you:

• You have strong backend core Java development skills
• You have a strong knowledge of software engineering best practices and have experience with TDD
• You have a good knowledge of SQL and Networking (TCP/IP)
• You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Algorithms, Design Patterns
• You're collaborative, with Pair Programming experience
• You enjoy problem solving and are keen to pick up new skills

What's in it for you:

As a Backend Software Engineer / Developer you will earn a highly competitive package including:

• Salary to £160k
• 8% pension contribution
• Life Assurance and Income Protection
• Enhanced paternity packages
• Private Medical care for you and your family including same day GP appointments and prescriptions
• Flexible working hours
• Charitable donations matching scheme and much more

Apply now to find out more about this Backend Software Engineer / Developer (Java TDD) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Backend Software Engineer / Developer (C# .Net Core Azure SaaS) Reigate/ WFH to £90k

Are you a backend focussed C# technologist with an indepth knowledge of Azure?

You could be progressing your career in a senior, hands on role at a global InsurTech business that is producing game changing technology.

As a Backend Software Engineer you will join the team responsible for their flagship SaaS insurance platform that handles 4 billion requests per month, playing a key role in designing and developing new features and enhancements whilst ensuring high levels of security, reliability, maintainability, usability and performance. You'll collaborate with the Product Owner and with other development teams in an Agile environment that encourages close collaboration and continual improvement.

Location / WFH:

There's a flexible work from home hybrid model, you'll join colleagues in the Reigate office twice a week for team meet-ups and stakeholder meetings with the other three days work from home.

About you:

• You have expertise with C# .Net Core backend software development, having worked on large, scalable systems with complexity
• You're an advocate of creating, clean, reusable and maintainable code and have a good knowledge of modern Microsoft software engineering best practices
• You have a strong knowledge of Azure and SaaS
• You have a good knowledge of security and IAM in Azure
• You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patters, Algorithms
• You have a good understanding of CI/CD and Infrastructure as Code (IaC)
• You're likely to be degree educated in a relevant STEM discipline

What's in it for you:

As a Backend Software Engineer / Developer you will receive a competitive salary plus a range of perks and benefits:

• Up to £90k salary plus bonus
• Hybrid working (3 days a week work from home)
• Enhanced parental leave
• 25 days holiday (plus buy days and your birthday off)
• Pension, Health Care and Life Assurance
• Training and career development
• Social events and a range of other perks

Apply now to find out more about this Backend Software Engineer / Developer (C# .Net Core Azure SaaS) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Backend Software Engineer / Developer (C# .Net Core Cloud CQRS) London / WFH to £80k

Are you a technologist with strong backend C# .Net skills?

You could be progressing your career at in a senior, hands-on role Backend Software Engineer role at a successful and scaling Retail FX Brokerage working on complex and interesting Greenfield systems with continual learning and self development opportunities.

As a Backend Software Engineer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. You'll focus on C# .Net backend development within an AWS environment, but also with exposure across the full technology stack in a modern development environment with microservices. There are many technical challenges to explore, the initial project will be to build a KYC system from scratch.

Location / WFH:

You'll join colleagues in the London office Monday to Wednesday with flexibility to work from home Thursday and Friday.

About you:

• You have strong C# .Net Core backend development experience
• You have a good knowledge of microservices and Cloud (AWS or Azure) experience, ideally you'll have some experience with Docker / Kubernetes, EKS
• You have a good understanding of CQRS and event driven architectures
• Ideally you will also have some front end development experience with JavaScript / TypeScript / React.js or Angular
• You have strong analytical and problem solving skills
• You're collaborative with excellent communication skills

What's in it for you:

As a Backend Software Engineer / Developer you will earn a competitive package:

• Up to £80k salary
• Bonus
• Private Healthcare
• Pension
• 25 days holiday

Apply now to find out more about this Backend Software Engineer / Developer (C# .Net Core React) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

We are seeking a skilled and reliable Back-End Developer with hands-on experience in Braze CRM. This remote role is based anywhere in the UK and is ideal for a backend-focused developer adept at navigating service-oriented architecture and solving medium-sized engineering problems. The successful candidate will collaborate with teams across product, marketing, and operations to deliver robust backend services and ensure scalable, data-driven, and performant CRM campaigns.

• Design and implement robust backend services and microservices to support CRM functionality and campaign logic, ensuring services are modular, testable, and scalable.
• Develop and maintain integrations between Braze and internal platforms.
• Support the build and optimization of campaign templates, including Emails, IAM, Push, Content Cards, and WhatsApp, using tools like JSON, Liquid, Handlebars, MJML.
• Collaborate with product and marketing stakeholders to translate requirements into scalable technical solutions.
• Own medium-sized technical problems and deliver working, well-documented solutions.
• Contribute to code reviews, release cycles, and team ceremonies.
• Document services, features, and decisions to support long-term maintainability.
• Diagnose and resolve performance issues across CRM campaigns and related backend services.
• Support QA and deployment processes to ensure defect-free CRM experiences.

• Ideally 4+ years of backend development experience.
• Strong development skills in coding languages such as Python (essential).
• Experience in coding Golang (preferred, but not essential).
• 2+ years of hands-on experience with Braze CRM, including building and managing Braze campaigns.
• Solid understanding of RESTful APIs, event-driven architectures, and microservices.
• Experience with templating languages such as Handlebars.js, MJML, Liquid.
• Proficiency in HTML, CSS, JavaScript for CRM asset customisation.
• Comfortable working with JSON data models.
• Familiarity with GIT and continuous integration/deployment workflows.
• Working knowledge of non-functional requirements (performance, accessibility, security).
• English at C1 level.

London, UK

Trading as TEKsystems. Allegis Group Limited, Maxis 2, Western Road, Bracknell, RG12 1RT, United Kingdom. No. (phone number removed). Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at (url removed)>

To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go to (url removed)>

We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the "Contacting Us" section of our Online Privacy Notice at (url removed)/en-gb/privacy-notices for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. If you are resident in the UK, EEA or Switzerland, we will process any access request you make in accordance with our commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield.

We're looking for an inspiring and technically strong Head of Backend to lead our backend engineering teams through the next chapter of innovation and scale at E.ON Next. This role is all about impact on our people, our technology, and the energy transition.

You'll report to the Head of Engineering and lead a group of 30+ backend engineers across multiple squads, building secure, scalable systems on AWS serverless platforms with Python at the core. Your leadership will help shape the future of our backend strategy, ensuring it aligns with our broader technology vision and the evolving needs of our customers and business.

A taste of what you'll be doing:

• Lead and Inspire: Inspire and support 30+ talented engineers across multiple squads. You'll create an environment where people feel psychologically safe, connected and excited to contribute.

• Champion inclusive excellence - Promote best practices in backend development with a focus on scalability, quality, and cloud-native approaches using Python and AWS (especially serverless).

• Strategic Vision: Shape the long-term direction of backend engineering at E.ON Next. You'll help align our work with the broader technology strategy, enterprise architecture, and the needs of our customers and business.

• Delivery Champion: Own the outcomes. Work closely with Product Managers and stakeholders to deliver meaningful, high-quality solutions that contribute to our shared goals and OKRs. You're a partner in progress.

• Technical Excellence: Uphold and promote engineering best practices. Ensure our solutions are scalable, maintainable, and future-ready while nurturing a culture of continuous improvement.

• Empowerment Advocate: Encourage your teams to take initiative and own their work. Provide guidance and support without micromanaging and trusting your engineers to make smart decisions.

• Growth Facilitator: Invest in the development of your people. From mentoring to creating learning opportunities, you'll help every engineer reach their full potential.

• Be a collaborative voice: Build trusted relationships across the business and contribute to conversations that move our technology and culture forward.

• Hands-on Leader: While leadership will be your primary focus, you'll still have the chance to stay connected to the tech and contributing when needed and keeping your skills sharp.

• Tell our story: Be a visible ambassador for engineering at E.ON Next, speaking confidently at internal and external events and sharing insights on platforms like LinkedIn.

Are we the perfect match?

We're looking for someone who's excited by the challenge of growing teams, building thoughtful technology, and creating an inclusive and empowering work environment.

If you're passionate about people first leadership, agile ways of working, and engineering excellence, you could be exactly who we need.

• Leadership Expertise: You've led and supported large backend engineering teams (30+ FTEs) and are passionate about creating inclusive and high performing environments. You lead with empathy, foster psychological safety and help others thrive through trust, clarity, and empowerment.

• Technical Foundation: You have strong hands-on experience in backend development, particularly with Python and AWS serverless technologies. You understand what it takes to build secure, resilient systems that scale and can support others in doing the same. Experience with PCI Compliance, AI, or Telephony platforms is a big plus. Please note: we're looking for experience beyond Microsoft-based stacks; this role requires depth in cloud-native and open-source ecosystems.

• Strategic Thinker: You think beyond the code. You're comfortable contributing to long term tech strategies that balance innovation, user needs, and business outcomes.

• Agile Ways of Working: You embrace agile principles and value continuous improvement. You bring a collaborative mindset and experience working in fast paced environments where iteration, experimentation and learning are key.

• Delivery Focus: You've successfully delivered robust, impactful backend solutions and know how to balance quality with agility.

• Mentorship & Growth: You care deeply about helping others grow. Whether it's through mentoring, coaching or creating space for learning, you're motivated by seeing your team succeed and individuals reach their potential.

  Communication & Influence: You're a clear, kind communicator who listens well and shares ideas with confidence. You're comfortable engaging both technical and non-technical audiences and you enjoy telling the story of what your teams are building and why it matters.

It would be great (but not essential) if you also bring:

• Experience in a compliance driven or regulated industry like energy or finance.

• A background in shaping technology strategy or contributing to architectural decisions at scale.

• A track record of being active in the tech community from events and panels to blogs or online conversations.

Is this role right for you?

This role may not be the best fit if your experience has been exclusively in Microsoft-based stacks or limited to early-stage start-ups. We're looking for someone who has delivered at scale, ideally in complex, cloud-native environments with a breadth of engineering and organisational maturity.