11,424 Senior Developer jobs in the United Kingdom

• Senior Full Stack Developer
• Exeter, Devon (Hybrid-Working with a minimum of x2 days in the office you must be based locally)
• c£60,000 per year
• Pension, Bonuses, Life Insurance, Healthcare etc.

Skills and Experience:

• Extensive experience with web application and API development at a senior level
• Must be able to mentor more junior members of the team in the absence of the Technical Lead
• Expert understanding of microservice architecture
• Expert knowledge of PHP Symfony framework is preferred
• Proficient in JavaScript, including modern frameworks in this instance React is preferred
• Proficient in SQL and experience with MySQL
• Experience with cloud platforms (AWS preferred)
• Familiarity with design-led and mobile-led approaches
• An understanding of good UI/UX design
• A good working knowledge of Docker
• Experience delivering SaaS solutions
• Experience implementing CI/CD pipelines
• Design, develop, test and maintain complex PHP web applications and APIs to deliver secure, scalable and performant solutions
• Design and develop front end code with a focus on security, accessibility and delivering a great user experience
• Provide input on key technology, architectural and development decisions

The Opportunity:

In this role you will have a hands-on role at all stages of the software lifecycle, giving input on planning and solution design, alongside coding, testing and maintaining web applications and APIs.

You will work within a team of agile developers to build and support systems to a high standard of security, scalability and performance.

The successful candidate will have demonstrable experience working at a senior level across the full stack within a web development team, with a keen attention to detail and strong problem-solving skills.

Please note this role will not be fully remote and there is no flexibility on the x2 days per week qt the client’s offices based in Exeter.

Applications:

Please contact John Noonan here at ISR to learn more about our client based in Devon and how they are developing the IT services and systems across the fleet and facilities management sectors that make them a leader in their field?

**Full Stack Developer** (Contract)

Duration: 3 Months (Possibility for extension)

Location: Remote (Occasional travel to London as and when required)

Rate: A highly competitive Umbrella Day Rate is available for suitable candidates

Role Profile

We are seeking a highly skilled Full Stack Developer with senior-level expertise to join our dynamic team. Your primary focus will be on scaling AI assets and developing our innovative Retrieval-Augmented Generation (RAG) product. This role will place you at the intersection of advanced Large Language Models (LLMs), intelligent agents, and application development, contributing to the next generation of AI-driven solutions.

Key Responsibilities:

• Backend Development: Design, develop, and maintain scalable backend services using Python. Integrate these services with LLMs, agents, and document processing frameworks to create robust solutions.
• Frontend Development: Build intuitive and responsive frontend interfaces using React, ensuring a seamless user experience.
• Collaboration: Work closely with cross-functional teams to design and implement AI-powered applications and solutions that meet business needs.
• AI Product Development: Contribute to the development of our Document Understanding product, enhancing the scalability and efficiency of our AI assets. Stay abreast of emerging AI technologies, including LLMs, agentic architectures, and application integrations.

Skills & Experience:

Proven expertise in full stack development with a strong focus on Python (backend) and React (frontend).

In-depth knowledge of Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and related AI/ML concepts.

Demonstrated ability to design scalable, reliable, and maintainable software solutions.

Strong team collaboration skills, with a proactive approach to problem-solving.

Hands-on expertise with LangChain.

Experience with AI model deployment and optimization strategies.

Technical Expertise Required:

• Proficient in Python
• Experienced with REACT.js
• Familiar with Node.js
• Knowledge of Docker
• Understanding of LangChain
• Experience with cloud platforms such as Amazon Web Services (AWS) or Azure
• Familiarity with LLMs and RAG technologies

Candidates will need to show evidence of the above in their CV in order to be considered.

If you feel you have the skills and experience and want to hear more about this role 'apply now' to declare your interest in this opportunity with our client. Your application will be observed by our dedicated team.

We will respond to all successful applicants ASAP however, please be advised that we will always look to contact you further from this time should we need further applicants or if other opportunities arise relevant to your skillset.

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive.

As part of our standard hiring process to manage risk, please note background screening checks will be conducted on all hires before commencing employment.

Job Title: Full Stack Developer
Location: Hybrid with travel to London and Bristol
Duration: 6 Months
Rate: 650 per day - PAYE via Umbrella only
Clearance: Active MOD SC clearance is necessary for this role.

Job Description

• Develop and maintain web applications: Design, code, test, and deploy scalable and efficient web applications using modern technologies.
• Collaborate with cross-functional teams: Work closely with designers, product managers, and other developers to create seamless user experiences.
• Implement front-end solutions: Create responsive and interactive user interfaces using HTML, CSS, JavaScript, and front-end frameworks such as React, Angular, or Vue.js and TypeScript
• Develop back-end services: Build and maintain server-side logic, databases, and APIs using Spring and Java
• Experience of Cloud Native microservices architectures deployed on Kubernetes hosted on Red Hat OpenShift
• Experience of CI/CD pipelines using GitHub and ArgoCD
• Ensure application performance: Optimize applications for maximum speed and scalability.
• Maintain code quality: Write clean, maintainable, and well-documented code, and perform code reviews.
• Stay updated with industry trends: Keep up-to-date with the latest trends and best practices in web development and share knowledge with the team.

Required Qualifications:

• Bachelor's degree in Computer Science, Engineering, or a related field.
• Proven experience as a Full Stack Developer or similar role.
• Proficiency in front-end technologies: HTML, CSS, JavaScript, and front-end frameworks (React must, Angular, Vue.js).
• Strong back-end development skills: Experience with server-side languages and frameworks (Java and Node.js must, Python, Ruby on Rails).
• Familiarity with version control systems: Git.
• Experience with DevOps practices: CI/CD pipelines, containerization (Docker, Kubernetes).
• Experience with Red Hat Open Shift
• Excellent problem-solving skills and attention to detail.
• Strong communication and teamwork skills.

Preferred Qualifications:

• Experience with databases: PostgreSQL
• Knowledge of cloud services: AWS, Azure, or Google Cloud Platform.
• Familiarity with Agile methodologies.

About yuv:
 yuv® is reinventing the professional hair colour industry with state-of-the-art technology. Our platform combines advanced hardware, cloud-connected software, and sustainable packaging to empower hairdressers with precision, creativity, and efficiency. Backed by patents, award-winning design, and cutting-edge digital tools, we are building the world’s first smart colour lab for salons and freelancers.

Role Overview:
We are seeking an experienced Full Stack Developer to help design, build, and scale the digital backbone of yuv. This role focuses primarily on web applications, APIs, payments, and e-commerce enablement features, ensuring seamless experiences for salons, freelancers, and clients.

Key Responsibilities:

• Design, build, and maintain scalable full-stack web applications and supporting infrastructure.
• Develop secure, reliable, and high-performance back-end services.
• Integrate and manage Stripe payments for subscriptions, transactions, and payouts.
• Implement and optimize analytics and e-commerce empowerment tools (e.g., Google Analytics, Meta Pixel, conversion tracking).
• Build responsive, performant front-end interfaces using modern frameworks.
• Write clean, maintainable, and well-documented code.
• Participate in code reviews, testing, and CI/CD deployment pipelines.
• Contribute to technical architecture and scaling decisions as yuv expands globally.
   

Qualifications:

• 5+ years of professional experience as a Full Stack Developer.
• Strong proficiency in modern front-end frameworks (React, Next.js, or similar).
• Comfortable with the use of design libraries (Material UI, Tailwind or similar)
• Solid back-end development experience (Node.js, Nestjs, Express, or similar).
• Proven experience with Stripe API integrations.
• Familiarity with databases (PostgreSQL, MySql, or similar).
• Experience building and consuming RESTful APIs and/or GraphQL.
• Knowledge of marketing analytic tools  (Google Analytics, Meta Pixel, etc.).
• Basic knowledge of AI/ML tools and their integration into applications.
• Strong understanding of Git, CI/CD, and agile development practices.
• Awareness of GDPR, privacy, and data security standards.
• Excellent problem-solving skills and ability to thrive in a collaborative, fast-paced environment.
   

Nice-to-Have (Optional):

• Experience with Flutter for mobile applications.
• Background in SaaS or consumer-facing digital platforms.
• Familiarity with referral systems, network-effect features, or growth-driven design.
   

What We Offer:

• Competitive salary and benefits package.
• Office-based role in our London HQ with a collaborative, creative team.
• Opportunity to work on innovative technology in a high-growth startup.
• Direct impact on products used by professionals globally.
• Career development opportunities as yuv® expands into new markets.
   

• Design, develop, and maintain full-stack web applications.
• Write clean, efficient, and well-documented code for both front-end and back-end components.
• Collaborate with cross-functional teams, including designers and product managers, to define and implement new features.
• Develop and manage APIs and database integrations.
• Implement user-facing elements with a focus on usability and performance.
• Conduct thorough testing to ensure application stability and functionality.
• Troubleshoot, debug, and upgrade existing software.
• Stay up-to-date with emerging technologies and industry trends.
• Participate in code reviews and contribute to team knowledge sharing.
• Ensure adherence to coding standards and best practices.
• Optimise applications for maximum speed and scalability.
• Contribute to the overall technical architecture and strategy.

• Proven experience as a Full Stack Developer or similar role.
• Proficiency in front-end technologies such as HTML, CSS, JavaScript, and modern frameworks (e.g., React, Angular, Vue.js).
• Strong experience with back-end languages and frameworks (e.g., Node.js, Python/Django, Ruby on Rails, Java/Spring).
• Solid understanding of database technologies (e.g., SQL, NoSQL).
• Experience with version control systems (e.g., Git).
• Knowledge of RESTful APIs and web services.
• Understanding of cloud platforms (e.g., AWS, Azure, GCP) is a plus.
• Excellent problem-solving and debugging skills.
• Strong communication and collaboration abilities.
• Ability to work independently and manage time effectively in a remote setting.
• Relevant degree in Computer Science or a related field, or equivalent practical experience.
• Experience with containerization technologies (e.g., Docker) is advantageous.

• Design, develop, and maintain both frontend and backend components of web applications.
• Write clean, efficient, and well-documented code across the full stack.
• Collaborate with designers, product managers, and other engineers to translate requirements into functional applications.
• Develop and implement user-facing features using modern frontend frameworks (e.g., React, Angular, Vue.js).
• Build and maintain robust backend services and APIs using relevant server-side languages and frameworks (e.g., Node.js, Python/Django, Ruby on Rails).
• Integrate frontend applications with backend services.
• Work with databases (SQL and NoSQL) to manage data effectively.
• Implement and maintain automated testing strategies (unit, integration, end-to-end).
• Participate in code reviews, providing constructive feedback to peers.
• Troubleshoot, debug, and upgrade existing software.
• Ensure the technical feasibility of UI/UX designs.
• Stay up-to-date with emerging technologies and industry trends.

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
• Proven experience as a Full Stack Developer or similar role.
• Proficiency in frontend technologies (HTML, CSS, JavaScript) and modern frontend frameworks.
• Strong experience with at least one server-side language and framework.
• Familiarity with database technologies (e.g., PostgreSQL, MySQL, MongoDB).
• Understanding of version control systems (e.g., Git).
• Knowledge of RESTful API design principles.
• Experience with cloud platforms (e.g., AWS, Azure) is a plus.
• Excellent problem-solving and analytical skills.
• Strong communication and teamwork abilities.
• Ability to work effectively in a hybrid environment.

Full Stack Developer – Family Events Startup

London (Hybrid: 3 days in Euston office, 2 days remote) | Competitive Pay & Great Benefits

Our client is on a mission to make family life easier. They connect parents with trusted organisers, from local clubs to major venues, helping them discover and book amazing activities for their children.

They're a growing London-based startup building a marketplace .

WHJS1_UKTJ

A technology led organisation in Chester are growing their development team. They are seeking passionate Software Engineers to join their team to help create secure, scalable and customer first solution. Paying up to a £80k package per annum you will be based out of their Chester offices 2 days a week.

They are looking ideally for Full stack developers with skills in React, JavaScript, Java and clo.

WHJS1_UKTJ