1,701 Commerce Developer jobs in the United Kingdom

Job Title:Software Engineer( Backend Developer)
Location:London
Contract: 6 Months with potential extension (Inside IR35)
Commute- Max 2 days in office
Payrate : 63 - 84 Per Hour Inside IR35

About the Role

We are seeking a Software Engineer (Backend Developer) for the FinTech business unit of a leading global digital travel platform. This role involves building innovative regulatory technology solutions to ensure compliance and manage risks. The engineer will work on a mission-critical platform that uses state-of-the-art technology for sanctions screening and other regulatory processes. The position requires developing highly scalable distributed systems and micro-services that support business objectives and enhance the experience for partners and internal stakeholders

What You'll Do

• Design, build, and maintain scalable microservices that power our compliance platforms.
• Develop tools and systems for sanctions screening, transaction monitoring, and regulatory reporting.
• Optimize backend processes for performance, reliability, and data integrity.
• Enhance tooling, analytics, and reporting used by internal compliance stakeholders.
• Collaborate with cross-functional teams to understand regulatory processes and deliver technical solutions.
• Participate in on-call rotations, incident resolution, and continuous improvement initiatives.
• Contribute to hiring efforts and mentoring junior engineers.

What We're Looking For

• 5+ years of experience in software development with at least 2 server-side languages - Java being must have
• Proven experience with microservices architecture and scalable, distributed systems.
• Proficient in data technologies like MySQL , Hadoop , or Cassandra .
• Experience with batch processing , data pipelines , and data integrity practices.
• Familiarity with AWS services (e.g., RDS, Step Functions, EC2, Kinesis) is a plus.
• Solid understanding of unit , integration , and E2E testing paradigms.
• Prior experience in FinTech, Financial sector, Banking or Payment system.
• Awareness of security best practices (authentication, authorization).
• Experience with globally distributed teams is a plus.

This is an urgent vacancy where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your CV or send it khushboo. pandey @ randstad. Co. uk

Randstad Technologies is acting as an Employment Business in relation to this vacancy.

Role: Backend Engineer (NestJS, SaaS, ERP)
We're hiring a seasoned backend engineer to lead our platform rebuild You'll collaborate closely with the founder, shaping the product and scaling the tech.

What You'll Do

• Lead backend dev using NestJS

• Design scalable APIs and ERP/accounting tool integrations

• Work with AI tools (OpenAI, Vertex AI)

• Define architecture and set engineering standards

• Mentor junior .

WHJS1_UKTJ

The Opportunity

We're looking for a talented Senior Backend Developer to join a purpose-driven tech team that creates solutions making a real difference in people's lives. This is more than just a job, it's a chance to shape systems that support individuals and organisations across the UK and Ireland.

The Role

As a Senior Backend Developer, you'll be a founding member of a newly formed cross-functional engineering team. You'll play a key role in setting the tone for the team's culture, practices, and success. Your technical expertise will shape our architecture and support business-critical applications.

This is a highly collaborative role suited to someone with a passion for software craftsmanship and continuous improvement.

Key Responsibilities

• Enhance features and functionality of core products
• Design and implement scalable backend systems using C# (.NET 5+ preferred)
• Write clean, maintainable, and testable code using TDD/BDD principles
• Create and maintain RESTful and GraphQL APIs
• Collaborate with POs, BAs, and stakeholders to define solutions
• Mentor junior developers and promote best practices
• Drive improvements in development processes and tools

What You Bring

• 5+ years of backend development experience
• Expertise in C#, .NET (preferably .NET 6+), and SQL Server
• Deep understanding of SOLID and OOP principles
• Skilled in Git, Unit Testing (NUnit), and API development
• Familiarity with CI/CD pipelines and agile methodologies
• Strong communication and problem-solving skills
• Desire to grow within a dynamic and evolving team

Why Join?

This is an incredible opportunity to make your mark in a company that prioritises purpose, innovation, and professional growth. You'll be part of a team where your ideas are welcomed, your development is encouraged, and your work truly matters.

Ready to build something that helps others-and builds your career in the process? Apply today.

48954MS

INDMANS

The Liberty Recruitment Group is excited to be working in partnership with a leading Tech-enabled Analytics Consultancy based in London, who are looking for a Senior Backend Developer to join their award-winning Insurance division.

As part of a mixed technical team including back-end developers, testers, front-end developers and actuarial data scientists, you’d be working on their market-leading insurance application, used by some of the largest London Market and International insurers to assess over £200bn in reserves.

Your key focus will be:

• Leading the design and development of new product features, providing a holistic approach to design
li>Driving better integration between their C# and Python codebases, rewriting and restructuring code where needed to improve cohesion
• Address any performance bottlenecks and optimise performance of complex data workflows
li>Championing best practice and guiding the junior team members

What they’re specifically looking for:

< i>C# development experience (.Net 8) with production-level proficiency
• Data engineering – data-intensive application experience
< i>Python
• Azure PaaS / SaaS tools (eg. Azure Functions, App Services, Batch, Blob/Table/Queue Storage)
• Excellent problem-solving skills

Why join them:

It’s an entrepreneurial environment pushing the boundaries, harnessing technology to enable more efficient analytics. A true people-first employer where you’ll be supported to learn and develop your skills in a collaborative, innovative environment. Hybrid working (2 days a week in their London office), discretionary bonus, enhanced pension, private medical insurance, superb wellbeing services and much more.

Senior Backend Developer

Capital Pay Software Solutions Ltd

• Promoting world class payment solution systems to global audiences
li>Capital Pay Software Solutions Ltd is advancing its capabilities by enhancing its Payment Aggregator Platform.  li>This strategic initiative is crucial to our international operations, designed for optimal flexibility and adaptability across diverse markets. We are seeking highly skilled and motivated professionals to strengthen our expert team. If you excel in a dynamic environment and are dedicated to developing secure and scalable FinTech solutions, we encourage you to connect with us. Join Capital Pay International in driving innovation in the global payment landscape.
•  

Key Responsibilities:

• Lead the design and development of the core backend architecture, including the API gateway, transaction management layer, and merchant management layer.
• Select and implement appropriate technologies from our stack, which includes python, Node.js, or Jave for programming languages; Django, Express.js, or Spring Boot for frameworks; and PostgreSQL or MySQL for transactional date, with Redis for caching and session management.
• Design and implement robust security measures, including AES-256 encryption for sensitive data, TLS for secure communication, and OAuth/JWT for authentication and authorisation.
• Ensure the platform is compliant with PCI-DSS, GDPR, and other relevant data protection regulations.
• Integrate multiple payment gateways (Capital Pay, Stripe, Paypal, Barclaycard, Adyen, Worldpay) using provided SDKs/APIs.
li>Implement advanced fraud detection and anti-mney laundering (AML) systems.
• Develop and maintain RESTful APIs for seamless communication with the frontend and external systems.
li>Implement features for transaction tracking and status management (pending, completed, failed), refund and chargeback handling, and payment settlement (funds transfer to merchant accounts).
• Participate in architectural design discussions, code reviews, and technical mentoring.
• Contribute to the development of a developer-friendly API and comprehensive documentation.
• Set up and manage cloud infrastructure on AWS, Google Cloud, or Azure.
• Implement and manage continuous integration and continuous delivery (CI/CD) pipelines to automate software builds and deployments

We are looking for a candidate who:
• Has a proven track record of 6+ years in backend development, with significant experience in the FinTech or financial services sector.
• Possesses deep expertise in building scalable and secure backend services.
• Is proficient in at least one of the specified programming languages (Python, Node.js, Kotlin or Java) and their associated frameworks.
• Has a strong experience with database design and management, including both SQL (PostgreSQL or MySQL) and potentially NoSQL databases.
• Has hands-on experience with RESTful API design and microservices architecture.
• Demonstrates a strong understanding of security best practices and compliance standards like PCIDSS and GDPR.
• Has experience integrating with third-party APIs, particularly payment gateways.
• Has experience in NFC/RFID technology and Payment Networks integrations.
• Is adept at problem-solving, has excellent attnetion to detail, and can work effectively in a fast-paced,agile environment.
• Familiarity with serverless architecture is beneficial.
• Experience with messaging systems like RabbitMQ or Kafka is a plus.
• Experience implementing two-factor authentication (2FA) for user logins.
• Experience with performance optimisation for high-traffic scenarios and a large number of concurrent users.

Principal .Net Developer – SaaS Company – Greater Manchester

Salary: £70,000 to £80,000 + Benefits
Location: Manchester

Xpertise Recruitment are looking for a Principal .Net Developer to join a well-established and fast-growing SaaS business in Manchester.

This company has built a high-performing engineering team and a strong reputation for delivering scalable, user-centric software used by over a million users worldwide. They offer a modern tech environment, exciting product challenges, and a brilliant culture that supports learning, collaboration, and technical leadership.

Strategic technical leadership: You’ll play a key role in shaping the engineering direction of a product suite used globally. As a Principal Developer, you’ll help define architectural decisions, mentor senior developers, and guide best practices across multiple teams.

Supportive engineering culture: You’ll be surrounded by experienced engineers who value collaboration, clean code, and continuous improvement. There’s a strong sense of ownership and shared responsibility when tackling complex challenges.

Modern, cloud-based tech: You’ll work hands-on with the latest technologies including .Net 8 , C# , Azure , and infrastructure-as-code with Terraform . There’s a strong DevOps culture, and the environment encourages experimentation and innovation.

Agile, cross-functional teams: Product delivery is built around agile principles, iterative development, and real user feedback across the UK and international markets.

Low staff turnover: Engineers stay long term thanks to the positive culture, leadership support, and clear opportunities for personal and technical progression.

Tech-first mindset: The engineering team prioritises clean, test-driven code, continuous deployment, and automation. You’ll have the chance to help drive improvements to performance, scalability, and overall software design.

This is an opportunity to take the next step in your career as a hands-on technical leader working on meaningful software, influencing architectural decisions, and supporting the growth of a high-performing engineering team.

Please apply with your CV, and we’ll set up an informal call to talk through the role, tech, and team in more detail.

Senior .Net Developer – SaaS Company – Greater Manchester

Salary: £55,000 to £65,000 + Benefits

Location: Manchester – Most on-site

Xpertise Recruitment are looking for a Senior .Net Developer to join a well-established and fast-growing SaaS business in Manchester.

This company has built a high-performing engineering team and a strong reputation for delivering scalable, user-centric software used by over a million users worldwide. They offer a modern tech environment, exciting product challenges, and a brilliant culture that supports learning, collaboration, and progression.

• Supportive engineering culture: You’ll be surrounded by great people who enjoy solving complex technical challenges together. There’s a real sense of togetherness and shared ownership when approaching problems.

• Career development: Whether you're aiming to deepen your technical expertise or grow into leadership, you’ll be supported every step of the way with structured development paths and regular mentorship.

• Modern, cloud-based tech: You’ll work with the latest technologies including .Net 8 , C# , Azure  and infrastructure-as-code using Terraform.

• Agile, cross-functional teams: Their product delivery model is built around agile, iterative development with a focus on delivering real value to users not just in the UK, but internationally.

• Hybrid working with great office space: The office is ideal for in-person collaboration, architecture planning, and team socials, but you’ll have the flexibility to work from home. 

• Low staff turnover: People tend to stay for the long haul due to the positive working environment, leadership support, and shared mission.

• A tech-driven environment: This is a workplace that values test-driven code. You’ll be part of a team that practices DevOps principles and embraces a learning culture.

This is a brilliant opportunity to make an impact at a SaaS company that values its people and is continuing to grow. You’ll work with modern tech, a smart and collaborative team, and have the tools and support you need to progress.

Interested?
Please apply with your CV, and we’ll set up an informal call to talk through the role, tech, and team in more detail.

Principal .Net Developer – SaaS Company – Greater Manchester

Salary: £70,000 to £80,000 + Benefits
Location: Manchester

Xpertise Recruitment are looking for a Principal .Net Developer to join a well-established and fast-growing SaaS business in Manchester.

This company has built a high-performing engineering team and a strong reputation for delivering scalable, user-centric software used by over a million users worldwide. They offer a modern tech environment, exciting product challenges, and a brilliant culture that supports learning, collaboration, and technical leadership.

Strategic technical leadership: You’ll play a key role in shaping the engineering direction of a product suite used globally. As a Principal Developer, you’ll help define architectural decisions, mentor senior developers, and guide best practices across multiple teams.

Supportive engineering culture: You’ll be surrounded by experienced engineers who value collaboration, clean code, and continuous improvement. There’s a strong sense of ownership and shared responsibility when tackling complex challenges.

Modern, cloud-based tech: You’ll work hands-on with the latest technologies including .Net 8 , C# , Azure , and infrastructure-as-code with Terraform . There’s a strong DevOps culture, and the environment encourages experimentation and innovation.

Agile, cross-functional teams: Product delivery is built around agile principles, iterative development, and real user feedback across the UK and international markets.

Low staff turnover: Engineers stay long term thanks to the positive culture, leadership support, and clear opportunities for personal and technical progression.

Tech-first mindset: The engineering team prioritises clean, test-driven code, continuous deployment, and automation. You’ll have the chance to help drive improvements to performance, scalability, and overall software design.

This is an opportunity to take the next step in your career as a hands-on technical leader working on meaningful software, influencing architectural decisions, and supporting the growth of a high-performing engineering team.

Please apply with your CV, and we’ll set up an informal call to talk through the role, tech, and team in more detail.