247 Software Platform jobs in the United Kingdom

We're looking for a lead software engineer to own the development of Skiller Whale's web application, through which we manage and deliver live workshops to help software engineers grow. You'll be working closely with the CTO (that's me) to architect the system, maintain and build our platform, solve problems and help us to provide excellent learning to as many people as we can.

We're not looking for someone to just pick tickets off a feature board and implement them. We want somebody who seeks to understand enough context to highlight risks, suggest alternative solutions, come up with exciting ideas and then make them reality. You'll have a high degree of trust and autonomy, and need to be comfortable having responsibility for the application.

At Skiller Whale, we change what tech teams are capable of through live, expert-led workshops that developers love (they give us an average satisfaction rating of 4.8/5). Our sessions are short, targeted, and hands-on – challenging engineers to solve real problems with an expert there to help and explain as they go.

Learners regularly tell us:

“The real-time feedback loop of learning something, putting it into practice, and getting insight beyond ‘it works’ beats any other learning experience I’ve had by miles.”
“I loved that I could ask any questions at all, and learned new things even in a technology I’ve been using for 15 years!”

We believe that learning should be a productivity multiplier, not just a perk. And we're proving it - our coaching measurably impacts on the productivity of teams we work with .

We've grown revenue by 50%+ each year since Skiller Whale was founded in 2018, and have been profitable since the end of 2024. Our goal is to now accelerate this growth by continually improving coverage in what we coach, acquiring larger enterprise customers and continually increasing our brand awareness amongst the engineering leadership community.

We have a tight-knit core team of 10 people (6 of whom are software engineers), and a much larger community of senior and lead engineers who coach our sessions for a few hours each week.

We work fully remotely, but regularly catch up socially with each other, play online boardgames at lunchtime and have regular company updates / 'fin-wags' online (in case you couldn't tell from the company name, we love a pun). Twice a year we get together in person for a couple of days to have fun, and share information / talk company strategy.

From our most recent employee NPS survey we got a 93% rating.

The culture we’ve built at Skiller Whale is one of the things we’re most proud of – and it’s been a key part of how we hire and grow from day one. We also managed to turn our key values into a thematic acronym (though, in the spirit of openness, we’ll admit we slightly tweaked one word to make it fit).

We prioritise Openness, Rationality, Creativity and Autonomy - check out what we mean by these terms on our Notion page about values .

We believe that diversity makes us stronger and are dedicated to building a company that represents society as a whole. We value honest and open communication, and we believe that in order to foster an environment that enables this, it’s important that our team feel included and recognised.

We embrace flexible working, and 70% of our team, including all three founders are parents of young children, which makes this a necessity at times. Some of our team work 4 days a week, and we'd be open to this role being flexible - please ask if you have specific requirements.

We think an ideal fit for this role would be an experienced senior or lead software engineer who likes moving at speed, seeing the impact of their work, and thrives in an environment of high ownership and autonomy. Your time will be mostly dedicated to planning and building software, rather than people or project management, although you will be interacting regularly with people in other parts of the business to understand their problems and help come up with solutions.

You'll be the only person working full time on the application codebase, but strong engineering practices are core to our company culture, and you would not be working in isolation. You can expect daily standups, regular planning meetings and our production code all goes through PR review with the CTO or one of the Curriculum Team (who are all senior software / data engineers).

What you can expect to work on

• Designing and building system architecture in the cloud (previous projects have included custom online environments for learners to write and run code, a websocket -> sse proxy to get around firewalls that block websocket traffic, and a system to manage allocation of AWS accounts to learners so they are available for their sessions).
• Planning and developing new app features, (e.g. allowing break-out video conferencing groups within our coaching sessions, live-shared drawing whiteboards, smart-scheduling). You'll be given a lot of trust to make decisions, but with the support of the CTO
• Improving our build, testing and deployment processes.
• Fixing bugs, improving app performance etc.
• Collaborating with our CTO on the engineering side of our product roadmap, helping to define requirements and come up with creative solutions to business problems.
• Whilst the company is small, we’d also love you to be involved in the development of our teaching material if this interests you. This could be coming up with interesting and realistic code exercises / demo apps, writing clear explanations, or even leading some workshops depending on your skills and preferences.

Requirements

Essential

We think it's unlikely that the right candidate for this role won't meet these requirements:

• 5+ years of experience building, maintaining and securing web applications, with at least some work on infrastructure, databases, backend and frontend.
• 3+ years (and a high level of comfort) working with Ruby on Rails in a commercial team.
• Experience building and maintaining cloud infrastructure (ideally using AWS and Terraform).
• Strong written and verbal communication skills (fluent English).
• Comfort in a fast moving environment, where priorities can sometimes change quickly - ideally in a startup or scale-up.

For the most part, we expect you'll be able to fill knowledge gaps with specific tools, as long as you've had relevant experience. So don't worry if you've used GCP more than AWS, or CloudFormation instead of Terraform - we'd expect your understanding of the concepts to enable you to learn quickly.

However, we feel that Rails is quite specific, and therefore a hard requirement since most of our backend code is written in Rails and we need you to be able to hit the ground running.

Nice to have

• Experience owning the performance, monitoring and security side of web services.
• Interest in helping others to learn, such as mentoring developers at work.
• Familiarity with React and TypeScript.
• Comfort working with Terraform, Docker and AWS.
• Experience using multiple additional programming languages.
• Deep expertise in any other popular technologies.

Benefits

• £80,000-110,000 FTE salary, depending on background.
• Equity options in a growing, and profitable company.
• Enhanced parental leave.
• MacBook Pro provided.
• Up to £1000 to help set-up and improve your home office.
• Fully remote work, forever.
• Kind and collaborative company culture.
• 25 days holiday + public holidays, with flexible work options.
• Be a key part of growing our company, providing a valuable service you wish you'd had access to in your career.
• Make a huge impact in helping to build and shape the product, team and culture as we grow.
• Learn something new every week: working across the whole stack, and helping review our evolving teaching content, you’ll be exposed to new technologies all the time.

Location: Hybrid, Newcastle or Remote (UK Based)
Reports to: Engineering Manager
Type: Full-time

At Oak Engage, we’re on an exciting growth journey—backed by a major investment from NorthEdge to scale our impact and redefine the future of employee engagement. Trusted by some of the UK’s biggest brands, including Aldi, Five Guys, and ITV, we help organisations connect, engage, and empower their people through smarter, more personalised internal communication. With our next stage of expansion underway, we’re building a team of bold, ambitious thinkers ready to make their mark at a high-growth, purpose-driven SaaS company. If you’re looking to shape the future of work and grow alongside a company that’s going places, now’s the time to join Oak.

We’re looking for a skilled Back-End Engineer with strong C#/.NET experience to join our growing development team and help develop the services that power Oak’s platform. You’ll be responsible for building and maintaining the underlying systems that drive our core functionality, working with a modern tech stack and helping shape the future of our product architecture.

This is an ideal role for someone who enjoys solving technical challenges, designing performant scalable, secure systems, and working in a fast-moving SaaS environment.

• Design, build, and maintain scalable and secure APIs and backend services using C# and .NET
• Collaborate with front-end engineers and product teams to deliver seamless features
• Optimise database queries and application performance
• Contribute to architectural planning and system design
• Implement unit tests and support automated deployment pipelines
• Maintain code quality and documentation across projects, participate in code reviews

Requirements

• 3+ years of back-end development experience using C# and .NET Core/.NET 6+
• Strong knowledge of SQL and/or NoSQL databases
• Experience building REST APIs and microservices
• Solid understanding of software design principles, scalability, and performance
• Familiarity with CI/CD, Docker, "Familiarity with CI/CD pipelines, Docker and cloud infrastructure - Azure is an advantage"
  
  

Benefits

• A meaningful role in a mission-led SaaS company with strong growth and product-market fit
• The chance to work with household brands and solve real-world enterprise challenges
• Flexible hybrid or remote working options
• Private health insurance, life insurance, and Employee Assistance Programme (EAP)
• Gym contribution and travel allowance
• Enhanced maternity, paternity, and discretionary leave
• Generous holiday policy (25 days + Bank Holidays + additional discretionary days)
• Regular team socials and a positive, collaborative culture

Hiring Manager Interview

• Deep dive into architecture, problem-solving, and team contributions
• Assess communication and curiosity

Technical Task or Live Pairing

• Realistic, time-bound task or live coding session
• Use structured rubric for fairness (avoid freeform “whiteboarding”)
• "Focus on team collaboration, code quality, and feedback" 

Peer Technical Panel/Culture Fit / CTO Chat - In person at our NCL HQ

• Includes cross-functional devs, product manager or designer
• Assess long-term growth potential and alignment with tech principles
• Opportunity for candidate to ask strategic questions

At Oak, we’re committed to building a diverse and inclusive workplace where everyone feels welcome, supported, and able to thrive.

We believe that different perspectives make us stronger, and we actively encourage applications from people of all backgrounds, experiences, and identities — including, but not limited to, race, ethnicity, gender, age, disability, sexual orientation, and socio-economic status.

We are an equal opportunities employer. All hiring decisions are based on business needs, role requirements, and individual qualifications — without bias or discrimination.

If you require any adjustments to the interview process or the role itself to support accessibility, please let us know — we’re happy to help.

About us

• Lead the design, development, and deployment of cloud-native applications.
• Architect scalable and resilient microservices-based solutions.
• Mentor and guide a team of software engineers.
• Ensure code quality, performance, and security of the cloud platform.
• Collaborate with product management on feature roadmaps and technical strategy.
• Implement and optimize CI/CD pipelines for efficient software delivery.
• Troubleshoot and resolve complex technical issues.
• Stay abreast of emerging cloud technologies and development best practices.

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field.
• Minimum of 7 years of experience in software development, with at least 2 years in a lead or senior role.
• Extensive experience with cloud platforms (AWS, Azure, or GCP).
• Proficiency in programming languages such as Java, Python, or Go.
• Strong understanding of microservices architecture and design patterns.
• Experience with containerization (Docker, Kubernetes) and CI/CD tools.
• Excellent leadership, communication, and problem-solving skills.
• Proven ability to mentor and lead technical teams.

Suade’s success is built on grit, determination, and our proven ability to develop cutting edge technology to create the next generation of Regulatory Technology (RegTech) software.  

Are you someone who loves both technology and finance? If you're eager to kickstart your journey into software engineering, we've got an exciting opening for you. We're on the lookout for a Graduate Engineer to join our Platform team. The platform team is a specialized group of engineers responsible for designing, building, and maintaining the server-side infrastructure and business logic. 

Please note:

• This role is based in London. Suade has a flexible working policy but you will need to be available to come into the London office when required. Some travel may be required. 
• We are unable to offer visa sponsorship for this role. Applications from candidates who require visa sponsorship will not be considered.

Suade is delighted to be an equal opportunity employer we have a diverse team with great values. All qualified applicants will receive consideration for employment without bias.  

Responsibilities  

• Write clean, maintainable code following established coding standards 

• Implement new features and bug fixes under the guidance of senior engineers 

• Participate in code reviews and contribute to improving code quality 

• Collaborate with frontend engineers to implement API endpoints 
• Participate in agile development processes and team meetings 

• Document code and technical decisions for future reference 

Requirements

• Bachelor's or master's degree in computer science, Software Engineering, or related field 

• Strong understanding of computer science fundamentals 

• Proficiency in at least one programming language (preferably Python) 

• Basic knowledge of database concepts and SQL 

• Understanding of RESTful APIs and web services 

• Familiarity with version control systems (Git) 

• Strong problem-solving skills and attention to detail 

Good to have 

• Experience with backend frameworks (FastAPI)

• Knowledge of containerisation (Docker) 

• Understanding of testing principles and TDD 

• Familiarity with CI/CD pipelines 

• Experience with agile development methodologies 

Benefits

• 25 days holiday + Bank Holidays
• Flexible holiday - choose when you take your holidays by opting out of bank holidays if you would like!
• Additional annual leave holiday - An extra day of annual leave for every 3 years you work at Suade in addition to your existing 25 days on a pro rata basis.
• Company Pension
• Maternity leave and extraordinary paternity leave
• Flexible working hours
• Company laptop
• £500 Annual Training/ Development Subsidy
• Perkbox

Salary £35,000

Advance practical quantum computing through robust, production‑grade software.

Haiqu is building a world-leading software platform that enables previously impossible applications on modern quantum processors. Our full-stack approach has shown industry-first results in pilots with leading quantum early adopters. Backed by top investors, we offer a unique opportunity to join a fast-growing team and shape the development of the Quantum Computing software stack, allowing researchers and engineers to build meaningful applications without worrying about low-level intricacies.

We are looking for a Software Engineer (Quantum Platform and Tools) to contribute to the development of core components of our stack—from designing performant transpilation passes and hardware integrations to expanding our cloud‑native SDK and CI/CD pipelines.

Responsibilities

• Design and implement the hybrid quantum‑classical workflow orchestration.  Integrate advanced error‑mitigation techniques, develop novel quantum application primitives, and optimize system performance (including low-level implementations where necessary).
• Extend and maintain Haiqu’s SDK, developer tools, APIs, and backend systems to deliver a seamless and robust quantum development experience.
• Develop and optimise circuit transpilation and mapping strategies tailored to the constraints of multiple quantum hardware back‑ends.
• Build and maintain hardware‑integration layers for a growing set of quantum providers.
• Evolve our cloud infrastructure, CI/CD pipelines, and monitoring to ensure secure, scalable, and reliable system performance.
• Write thorough tests, benchmarks, and documentation to maintain code quality and reproducibility across the stack.

Strong Plus: 

• Basic quantum transpiler knowledge, such as:
• Quantum circuit optimization
• Gate decomposition and mapping
• DAG structures and graph manipulation
• Basis gate sets and device-specific transformations
  
• Experience working close to quantum hardware APIs. Experience of API-level interaction and understanding of device-specific properties (e.g., coherence times, gate fidelities, execution queues)

Requirements

• Strong experience in Python and modern software engineering practices
• Be comfortable with low-level programming when needed (e.g. C++, Rust, C)
• Strong software engineering background, including:
• Design patterns
• Data structures and algorithms
• API design (REST)
• Working with databases (SQL and NoSQL)
• Writing documentation and integration tests
• Understanding of functional programming concepts (e.g. monoids, composition, higher-order functions)
• Familiarity with quantum computing concepts such as:
• Quantum circuits
• Measurements, observables
• Noise channels
• Error mitigation
• Error-correction 
• Quantum Machine Learning
• Prior exposure to quantum SDKs (e.g., Qiskit, Cirq, PennyLane) and Quantum simulators.
• Hands-on experience with DevOps and infrastructure tools:
• Docker
• Cloud environments (GCP and AWS)
• CI/CD workflows

Comfortable working remotely and asynchronously across time zones

Benefits

We offer competitive compensation with significant equity and benefits. Join a diverse, flexible workplace building the future of quantum computing.