7,342 Go Developer jobs in the United Kingdom

About Us

Earnly is a FinTech startup on a mission to simplify financial management and empower individuals and businesses with real-time clarity on their money. We’re developing a new platform that makes financial insights accessible, transparent, and stress-free. As an early member of our team, you’ll have the opportunity to directly shape the product, culture, and future of the company.

About You

You thrive in dynamic environments where no two days are the same, motivated by big goals and the satisfaction of building something meaningful from the ground up. Startups bring tight deadlines, shifting priorities, and lean resources, but you embrace the challenge, staying focused under pressure, taking ownership, adapting quickly, and pitching in wherever needed.

The Role

We’re looking for talented backend developer with proven commercial experience to help us build the core infrastructure that shall power our entire platform. You’ll be responsible for designing, developing, and maintaining secure, scalable APIs, data processing pipelines, and backend integrations with third-party services like Stripe, PayPal, and Open Banking providers.

Key Responsibilities:

• Build and maintain robust RESTful APIs for mobile and web clients.
li>Design and manage databases built in MongoDB and SQL Server to store, query, and aggregate user financial data.
• Develop data ingestion pipelines to process real-time and batch data from external services.
• Optimize backend performance and ensure application scalability and resilience.
• Build authentication and authorization flows, following best practices for fintech-grade security.
• Write unit and integration tests, participate in code reviews, and contribute to continuous improvement.
• Collaborate closely with frontend/mobile engineers, product managers, and founders in agile development cycles.
• Contribute to infrastructure decisions (e.g. Docker, container orchestration, cloud services).

Skills & Experience You’ll Need

< i>3+ years’ experience in backend development (ideally in a startup or SaaS environment). < i>Proficient in .Net, Core 8, Razor Pages and Bootstrap 5 for UI.
• Experience with databases such as MongoDB and SQL Server, including schema design, indexing, and performance tuning.
• Familiarity with cloud platforms like Azure (we use Azure).
• Experience with containerization tools (Docker, Docker Compose) and deployment pipelines.
• Strong understanding of API design, versioning, and security (OAuth, JWT, API tokens).
• Comfortable working with Git, agile methodologies, and CI/CD practices.
• A good understanding of data protection, GDPR, and fintech security requirements.

Nice to Have

• Exposure to event-driven architecture or message queues (e.g. Kafka).
• Experience integrating payment platforms like Stripe, PayPal, Plaid, or Open Banking.
• Exposure to Azure App Services.
• Knowledge of financial systems, accounting, or tax workflows.

What We Offer

This is an unpaid role; however, it provides a unique opportunity to join a fast-moving company that is committed to disrupting an outdated industry. While the position does not include a salary, it offers the potential to earn equity in the business, contingent upon meeting clearly defined milestones and deliverables.

• Equity within the business (granted after demonstrating ability and commitment)
• Remote & flexible working environment
• Training and development budget to support your growth
• The chance to join a FinTech startup at an early stage, where your input truly shapes the product and business

Requirements

• UK-based (remote OK), right to work in the UK.

Interested?

If you’re excited about building cutting-edge financial technology and want to be part of a growing startup, we’d love to hear from you. Click Apply Now!

Backend Developer
Job Description:
Join Our Team as a Backend Software Engineer
Are you ready to take on the challenge of solving complex engineering problems with cutting-edge technologies? Sage is looking for a passionate Software Engineer Backend to build, enhance, and maintain products and systems that drive our business forward and exceed customer expectations.
*This role is a hybrid role - 3 days per week in our Newcastle Office*
Why You'll Love Working With Us:
- Innovative Technologies: Dive into the world of .NET C# framework and tackle difficult assignments with your broad knowledge of software development principles, practices, and procedures.
- High-Quality Development: Successfully develop, deliver, and maintain high-quality software, including requirements, design, code, and documentation.
- Collaborative Environment: Work closely with product managers to shape product definitions, ensuring flexibility, extensibility, and robustness.
- Cross-Functional Teams: Collaborate with various Sage teams, including product management, QA/XD, and different product lines or business units, to drive results.
- Mentorship Opportunities: Mentor and coach junior members of the development team, sharing your expertise and guiding their growth.
- Agile Methodologies: Leverage your extensive experience with Agile Development, SCRUM, and Extreme Programming methodologies to deliver exceptional results.
Key Responsibilities:
Necessary Skills:
-ASP.NET(C#): Proficiency in building and maintaining web applications usingASP.NETand C#.
- SQL: Strong understanding of SQL databases, including writing queries, optimizing performance, and managing database schemas.
- Security: Knowledge of best practices for securing web applications, including authentication, authorization, and data protection.
- Version Control (Git): Experience with Git for version control, including branching, merging, and pull requests.
- API Development: Proficiency in designing and developing RESTful APIs.
Desirable Skills:
- Behavior Driven Design (BDD): Familiarity with BDD principles and tools like SpecFlow or Cucumber for writing and automating tests.
- Elastic Search: Experience with Elastic Search for implementing search functionality and managing large datasets.
- Docker: Knowledge of containerization using Docker for creating, deploying, and managing applications.
- CI/CD: Understanding of Continuous Integration and Continuous Deployment practices, including tools like Jenkins, GitHub Actions, or Azure DevOps.
- Microservices: Experience with designing and implementing microservices architectures.
- Domain Driven Design (DDD): Understanding of DDD principles for structuring and organizing code based on business domains.
- Cloud Platforms: Experience with cloud services like AWS, Azure, or Google Cloud.
- Agile Methodologies: Experience working in Agile environments, including Scrum or Kanban.
VC-LINKEDIN
Your Benefits:
- Competitive Salary: Enjoy a competitive base salary and commission structure.
- Health Coverage: Comprehensive health, dental, and vision coverage.
- Work Away Scheme: Take advantage of our work away scheme for up to 10 weeks a year.
- Professional Development: Benefit from ongoing training and professional development opportunities.
- Volunteer Days: Paid 5 days yearly to volunteer through our Sage Foundation.
- Flexible Work Patterns: Embrace flexible work patterns and hybrid working, with 3 days in the office.
Ready to make a difference and join a dynamic team? Apply now and be part of Sage's exciting journey!
Function:
Product Delivery
Country:
United Kingdom
Office Location:
Newcastle
Work Place type:
Hybrid
Advert
Working at Sage means you're supporting millions of small and medium sized businesses globally with technology to work faster and smarter. We leverage the future of AI, meaning business owners spend less time doing routine tasks, like entering invoices and generating reports, and more time pursuing their ambitions.
Our colleagues are the best of the best. It's why we were awarded 2024 Best Places to Work by Glassdoor. Because to achieve extraordinary outcomes, we need extraordinary teams. This means infusing Sage with people who knock down barriers, continuously innovate, and want to experience their potential.
Learn more about working at Sage:sage.com/en-gb/company/careers/working-at-sage/
Watch a video about our culture:youtube.com/watch?v=qIoiCpZH-QE
We celebrate individuality and welcome you to join us if you embrace all backgrounds, identities, beliefs, and ways of working. If you need support applying, reach out
Learn more about DEI at Sage:sage.com/en-gb/company/careers/diversity-equity-and-inclusion/
Equal Employment Opportunity (EEO)
Sage is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants with physical and/or mental disabilities.
In order to provide equal employment and advancement opportunities to all individuals, employment decisions at Sage will be based on merit, qualifications, and abilities. Sage does not discriminate in employment opportunities or practices on the basis of race, color, religion, sex, national origin, age, protected disability, veteran status, sexual orientation, gender identity, genetic information, or any other characteristic protected by applicable law.

Get AI-powered advice on this job and more exclusive features.nDirect message the job poster from eTeamnSr. Technical Recruiter (UK/ EU) @ eTeam

Possibility of remote work: Hybrid, 3 days WHOnContract duration: 12 to 24 monthsnLocation: London, UKn---nJOB DETAILSnRequired Core Skills:nMinimum years of experience: 8+ yearsnDetailed Job Description:nQualificationsnBasic:n• Bachelor's degree or foreign equivalent required from an accredited institution. Will also consider three years of progressive experience in the specialty in lieu of every year of educationn• At least 6-12 years of experience with Information TechnologynSkill Requirements:n• 8+ years of experience in Application development using React js, python, AWS lambda, SNS, AWS Aurora database, S3, DynamoDB. Deep understanding of application development using advanced python programming and object-oriented conceptsn• ORM tools knowledge, preferably SQL alchemyn• GraphQL, API authentication, performance management, and internationalizationn• Strong knowledge of CI/CD pipelines to include automated quality checks and rollback upon new code deployments.n• IaC CDK stack knowledge for providing scalability to the running Elastic Map Reduce clusters over all regions.n• Working in SCRUM team, using GIT and branching mechanismsnResponsibilities:n• Develop custom bespoke solutions based on the business requirements. Performs software design using software development fundamentals and processes, debug, test, and deploy software solutions.n• Design, develop and maintain key components of the software suite using Open Source.n• Documents and demonstrate solutions by developing documentation, flowcharts, layouts, diagrams, charts, code comments and clear code.n• Actively participate in application design reviews by providing creative and practical ideas and solutions in a teamwork environment.nSeniority level

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Employment type ContractnJob function

Job function Information TechnologynIndustries Information ServicesnReferrals increase your chances of interviewing at eTeam by 2xnGet notified about new Back End Developer jobs in

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We’re making electric vehicle ownership as smart and simple as possible, by building the world’s largest, public charging platform.nIn just four years, Octopus Electroverse has grown to become one of the largest eMobility players globally, with over 850,000 connected electric vehicle chargers and a customer ecosystem spanning web, iOS, Android, CarPlay, Android Auto & Automotive OS, and more.nBut it’s just the start: we’re busy expanding internationally, working with more automotive and tech partners, building exciting new features at scale, and creating the integrated charging experiences of the future - all in the name of making public EV charging super simple for customers.nElectroverse is a multifunctional team made up of product, development, commercial, operations, marketing, partnerships and more - all focused on making Octopus Electroverse the go-to name in public EV charging. And we’re looking for smart individuals with an interest in the space who can help us make it happen.nWe’re looking for someone who’s passionate about code, curious, and eager to learn. You’ll be working alongside the backend team that provides services for our Electroverse ecosystem in the electric vehicle and electrification space with focus on helping develop the business proposition for fleets.nOur project is coming out of the early stages of the implementation and we’re working on big customer facing features which will give you the chance to have a huge impact and given our ambitions in the electrification space, influence how the back-end scales to meet new challenges and create a wider ecosystem.nOverall, you'll work with a small, high-energy project team to bring the product to life - an exciting opportunity to work like a start-up within a rapidly scaling EnTech business.nWhat you’ll do…

Help us develop our new exciting offering for businesses managing electric vehicles or who are undergoing an electrification transitionnSupport development in other areas within our Electroverse ecosystemnWork in a cross functional team to deliver best quality product for the users of our platformnWhat you'll have.

The passion to create something amazing, and the mindset to learn and grow with the company.nExperience in the creation of the web service backend for a mobile or web app using Python/DjangonA strong understanding of the Python ecosystem with 2+ years of experience.nAn ability to discuss vision and features within a team and propose creative solutionsnAn ability to write robust and fault-tolerant softwarenKnowledge of (or a desire to learn) GraphQL APIs is a plusnProficient understanding of GitnFamiliarity with continuous integration and continuous deploymentnNice to have, but not essential:

Experience working on B2B product features, e.g. KYB, invoicing, data protection rulesnExperience integrating third-party API solutionsnIf this sounds like you then we'd love to hear from you.nAre you ready for a career with us? We want to ensure you have all the tools and environment you need to unleash your potential.Need any specific accommodations?Whether you require specific accommodations or have a unique preference, let us know, and we'll do what we can to customise your interview process for comfort and maximum magic!nStudies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we're looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

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OverviewnLocation: London, United Kingdom (GB). Employment type: Full-time. Work arrangement: Hybrid.

We’re making electric vehicle ownership as smart and simple as possible, by building the world’s largest, public charging platform.

In just four years, Octopus Electroverse has grown to become one of the largest eMobility players globally, with over 850,000 connected electric vehicle chargers and a customer ecosystem spanning web, iOS, Android, CarPlay, Android Auto & Automotive OS, and more.

But it’s just the start: we’re busy expanding internationally, working with more automotive and tech partners, building exciting new features at scale, and creating the integrated charging experiences of the future - all in the name of making public EV charging super simple for customers.

Electroverse is a multifunctional team made up of product, development, commercial, operations, marketing, partnerships and more - all focused on making Octopus Electroverse the go-to name in public EV charging. We’re looking for smart individuals with an interest in the space who can help us make it happen.

We’re looking for someone who’s passionate about code, curious, and eager to learn. You’ll be working alongside the backend engineering team that provides services for our Electroverse ecosystem in the electric vehicle and electrification space with focus on helping develop the business proposition for external partnerships and APIs.

Our project is at an exciting time in its lifecycle; maturing quickly but still with plenty of opportunities to work on big features and scaling the product to meet new challenges, giving you the chance to have a huge impact within the team and wider industry.

Overall, you'll work with a small, high-energy project team to bring the product to life - an exciting opportunity to work like a start-up within a rapidly scaling EnTech business.

Responsibilities

Help us develop our exciting API proposition used by high-profile, global car manufacturers (OEMs) and other businesses to accelerate them in their electrification journey

Support development and scaling of the services that make up the Electroverse ecosystem

Work in a cross functional team to deliver the highest quality product and ultimate implementation for our clients

Support communication with partners and clients as part of delivery and expansion plans, and contribute internally to the evolution of the Electroverse business

Qualifications

The passion to create something amazing, and the mindset to learn and grow with the company.

A strong understanding of the Python ecosystem with 3+ years of experience.

Knowledge of RESTful APIs is a must, preferably within the Python / Django ecosystems

Experience with maintaining versioned APIs

Experience maintaining asynchronous processing systems (AMQP, Celery)

Experience with monitoring and debugging applications and infrastructure

Experience with maintaining high quality documentation for an externally facing product

Comfortable providing support, presenting technical solutions and collaborating with external clients via both written and verbal communication methods.

Experience working on processing large volumes of data

An ability to discuss vision and features within a team and propose creative solutions

Familiarity with continuous integration and continuous deployment

An ability to write robust and fault-tolerant software

Proficient understanding of Git

A knowledge of the protocols used within the EV charging industry is helpful but not required.

Equal OpportunitynAcross Octopus, we’re an equal opportunity employer. We do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

Studies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we’re looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

#J-18808-Ljbffrn

Requirements

3+ years of experience with Node.js/TypeScript in production.nProficient in PostgreSQL and Redshift.nStrong with AWS (ECS, RDS, S3, etc.) and CI/CD, IaC tools.nComfortable working in US time zones.nWhy You're a Great Fit

Experience with OpenAI APIs and context-aware assistants.nFamiliarity with Go routines and multi-agent systems (e.g., CrewAI).nSkilled in system design, API efficiency, and cost optimization.

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Full-time /nHybridnWe believe energy should be better - for you and the environment.nOctopus Energy is a leading energy technology (EnTech) company, committed to providing a better, fairer, and more transparent experience for our customers. Our dedication goes beyond just service: we make real, long-term investments in renewable energy to build a low-carbon future. By keeping energy green, flexible, and fairly priced, we’re helping consumers take control of their energy usage.nOur mission is simple: make energy greener, fairer, and genuinely better for people. Backed by Generation, the sustainable fund co-chaired by Al Gore, we are driving a global energy revolution. To achieve this, we’re looking for outstanding technical minds who are eager to use their skills to tackle one of the biggest challenges facing our planet.nWe’re proud to be Europe's best-funded green tech start-up, and one of Glassdoor's Best Places to Work. We’re also the most awarded energy supplier in the UK, and have been Which? Recommended seven years running.nWhat will you be doing?

Octopus Energy Engineering is responsible for the sites, services, and tariffs that are used by the millions of Octopus Energy customers worldwide. From building the latest, cutting-edge time-of-use tariffs, to helping customers actually enjoy tasks like providing meter readings through our wheel of fortune - and everything in between.nYou’ll find a wide variety of challenges in the work we do as we help push the energy revolution forward. Our teams are multi-disciplined and collaborate between countries, meaning you have what you need to get the right people together and build the next great thing.nOctopus Energy is growing rapidly, and the Octopus Energy Engineering team is at the forefront of this expansion. We are looking for a Backend Developer who will work closely with Octopus Energy UK and various teams, focusing on the development and integration of new features for the website and mobile app.nThe role involves working on different modules, including the private area, bill management and saving sessions , contributing to customer onboarding optimization and the implementation of marketing projects through dashboards and the personal area.nThe team is driven by the mission of creating a direct impact on customers in everything it does, meaning priorities do sometimes change, but the pace and resulting feedback cycle is satisfyingly quick, and consistently so too.nWe embrace flat hierarchies and an open, agile culture that fosters innovation, flexibility, and creativity.nWe don’t hang our personalities up with our coats and nor should you. At Octopus, we hire great people who get stuff done, all whilst being themselves.nWhat you'll need

We're looking for someone with a general interest in technology and problem-solving; someone diligent and thoughtful. It would be helpful to have experience in the following (in rough priority order):nPythonnDjango (or equiv. web framework)nGraphQL and REST APIsnWriting robust and fault-tolerant softwarenCelery and async processingnPlus experience in the following would be a bonus:nOctopus Energy is a unique culture - An organisation where people learn, decide, and build quicker. Where people work with autonomy, alongside a wide range of amazing co-owners, on projects that break new ground. We want your hard work to be rewarded with perks you actually care about!nFlexible working environment - genuine work life balance here, we treat you as a human, and do our best to make work and life merge smoothly together.nEquity Options Scheme - you own your own part of the business, share options in the whole Octopus Energy Group so we all work together towards success.nOffice culture - have a certain tech requirement? We’ll do our best to get it. Weekly on a Friday we all get together (this happens virtually too) for company updates and drinks - we call it Family Dinner.nYour development is important - we support and help with development including internal and external courses, learning, study support etc, all bespoke to you.

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Responsibilities

Design sophisticated Back End components, services, platforms, and Restful APIs for seamless communication with the Front End.nContinuously reviewing the services and components and seeking opportunities for improvements.nIdentifying and addressing Tech Debt.nInfluencing and delivering the product roadmap to improve our Key Performance Indicators and deliver tangible business value.nDeveloping the team's Software Engineering skills.nOwning the team's culture and ways of working, instilling a care for high quality code and tests and for implementing best practices.nQualifications

Bachelor's degree in Computer Science, Engineering, Computer Information Systems, or equivalent work experience.nExcellent communication skills and ability to communicate with your peers through to senior leaders. Should be able to engage and influence others to collect requirements, describe what you're doing, work through problems, and find productive solutions.nSelf-starter, able to handle ambiguity, navigate uncertainty, identify risks, and find the right people and tools to get the job done.nSoftware Skills:nSkillful in Python for developing scalable and maintainable software.nDatabase design and knowledge of PostgreSQL.nStrong Software Engineering Design capabilities and understanding of Computational Complexity.nSkillful in software engineering practices & best practices for the full software development life cycle, including coding standards, code reviews, source control management, continuous deployments, testing, and operations.

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Senior Backend Developer

Salary: Up to 90,000 per annum
Client: Leading Data Centre Provider

We're working with a well-established Data Centre Provider to recruit a highly experienced Senior Backend Developer. This is a remote role open to UK-based candidates, offering the chance to work on large-scale systems that support critical national infrastructure.

This is an excellent opportunity for a seasoned backend engineer with deep expertise in Node.js and TypeScript, who enjoys architecting scalable solutions and working with modern cloud technologies.

You'll be responsible for designing and building high-performance backend applications, contributing to the development of internal tools and processes, and ensuring code quality through testing and documentation. You'll also help shape technical standards and collaborate closely with other teams across the business.

Key Responsibilities

• Architect and develop scalable backend systems for enterprise-level applications
• Build and maintain robust Node.js services using TypeScript
• Optimise SQL queries and database performance
• Deploy and manage applications in cloud environments
• Customise build and development tools to suit project needs
• Apply best practices in software design, including SOLID principles and dependency injection
• Maintain clean, well-tested, and well-documented code
• Contribute to unit and integration testing across all deliverables
• Work closely with frontend developers to ensure seamless integration
• Stay up to date with emerging trends in backend development and share insights with the team

Required experience

• Extensive server-side development experience
• Strong proficiency in Node.js and TypeScript
• Solid understanding of cloud platforms and deployment strategies
• Deep knowledge of software architecture and design patterns
• Experience with CI/CD pipelines and modern development tooling
• Excellent communication and collaboration skills
• Must be eligible for SC clearance.

This is a brilliant opportunity to join a forward-thinking organisation at the forefront of digital infrastructure. If you're ready to take the next step in your backend development career, we'd love to hear from you.

Paying up to 90,000, depending on experience.

100% remote based.

Must be eligible to work in the UK.