366 Javascript jobs in the United Kingdom

Location: London
Clearance: Active SC Clearance
Salary: Competitive + Benefits

We are seeking a passionate Software Engineer to join a growing technology and AI consultancy. This is a fantastic opportunity to work in a dynamic, client-facing environment where your technical expertise and consultancy skills will directly support mission-critical outcomes.

Technical Skillset :

• Proficient in Python, SQL.

WHJS1_UKTJ

Job Title: React Front-End Developer

Location: Loughborough, Leicestershire – Office-Based

Salary: Competitive, Based on Experience

About Us

Forest Rock is a UK-based leader in IoT, energy management, and intelligent building technology. Headquartered in Loughborough, Leicestershire, we design and deliver full-stack solutions that combine smart devices, software platforms, and analytics to help organisations make their buildings more efficient, connected, and sustainable.

As a Tridium Platinum Partner , we provide a wide portfolio of hardware, custom software development, analytics tools like SkySpark, and expert training in technologies such as Niagara N4 and LoRaWAN. Our mission is to empower people and organisations to build smarter, more sustainable infrastructure through connected technologies.

We're expanding our in-house development team and are looking for a React JS Front-End Developer to join us in our modern Loughborough office.

What You'll Do

• Collaborate with UX/UI designers and back-end developers to create responsive, high-performance web interfaces using React.js
• Work on new feature development and ongoing maintenance of our in-house platforms
• Participate in team code reviews and agile development processes
• Translate business requirements and design wireframes into clean, scalable code
• Help identify performance bottlenecks and debug issues across devices and browsers
• Stay up to date with front-end trends, frameworks, and best practices

What We're Looking For

• 3+ years of experience in front-end development, primarily with React.js
• Proficiency in JavaScript (ES6+) , HTML5 , CSS3 , and responsive design
• Familiarity with REST APIs and version control systems like Git
• A detail-oriented mindset with good problem-solving skills and a strong desire to learn
• Comfortable working in a fast-paced, office-based environment
• Excellent communication skills and a collaborative attitude

Nice to Have

• Experience with TypeScript, Redux, or Next.js
• Familiarity with UI libraries or frameworks (e.g., Material UI, Tailwind)
• Understanding of accessibility standards and web performance optimisation
• Exposure to Agile/Scrum/ShapeUp methodologies

Why Join Forest Rock?

• Be part of an innovative team shaping the future of smart buildings and IoT
• Opportunities to work on impactful products used in real-world energy and building management systems
• Unlimited holidays
• Free gym membership
• A collaborative, supportive team culture in our modern Loughborough office
• Regular team events, knowledge-sharing sessions, and a focus on personal development

Senior Angular Developer- Newcastle

• Senior Angular Developer
• Up to £65k, benefits such as Bonus, 25 days Holiday, Paid for Certifications, Healthcare, Flexible hours and much more
• Remote first, quarterly visits to client site in Newcastle
• Angular, JavaScript, TypeScript, HTML, CSS, RESTful APIs

ABOUT THE CLIENT

My client is a mid-size IT Consultancy going from strength to strength. They work with a diverse range of clients across Education, Financial Services, Renewable, Healthcare.

All the teamwork adhering to best in industry techniques such as TDD, CI and Paired Programming.

THE BENEFITS

• Bonus
• 25 days Holiday
• Paid for Certifications
• Healthcare
• Flexible hours
• Annual trips abroad

THE ANGULAR DEVELOPER ROLE:

You’ll be joining, initially working with one of their EduTech clients.

We are looking for a Senior (5 years plus). You must have strong demonstrable experience in developing highly performance and data-intensive applications in Angular. As well as a in depth understanding of JavaScript/TypeScript (ES5 & ES6+).

ANGULAR DEVELOPER ESSENTIAL SKILLS:

Angular

JavaScript / TypeScript

RESTful APIs

Leadership qualities

Critical thinking skills

About Eventogy:

NO AGENCIES - Please do not attempt to canvas from here

Eventogy is a leading event management platform that caters to large corporate enterprise businesses, such as banks, law firms, and government bodies. We specialise in providing event management solutions for highly regulated industries, with a strong focus on security and compliance. As a design-first organisation, we are currently undertaking a complete rebuild of our platform to create an even more intuitive and engaging user experience.

We are seeking a skilled Javascript Developer to join our team and play a crucial role in implementing our redesigned platform. The successful candidate will work closely with our design and development teams to create pixel perfect and highly functional web applications, ensuring an exceptional user experience.

Responsibilities:

1. Collaborate with UX/UI designers and back-end developers to create visually appealing, user-friendly, and highly functional and responsive web applications.
2. Convert designs and wireframes into high-quality HTML, CSS, and JavaScript code.
3. Optimize applications for maximum speed, scalability, and responsiveness.
4. Ensure consistent implementation of brand and design guidelines across all platforms.
5. Develop and maintain reusable code and libraries for future use.
6. Stay up-to-date with the latest front end development technologies and best practices.
7. Conduct thorough testing and debugging to ensure the seamless functioning of applications.
8. Collaborate with cross-functional teams, including product managers, developers, and stakeholders, to define and implement innovative solutions for the product direction, visuals, and user experience.

Requirements

1. A Bachelor's degree in Computer Science, Web Development, or a related field.
2. A minimum of 3 years of experience as a Front End Developer, preferably in the event management or technology sector.
3. Proficient understanding of web markup, including HTML5, CSS3, and JavaScript.
4. Experience building NextJS Web Applications using Typescript.
5. Familiarity with TailwindCSS.
6. Experience with responsive and adaptive design, as well as an understanding of the technical limitations and constraints of web applications.
7. Strong understanding of cross-browser compatibility issues and ways to work around them.
8. Knowledge of code versioning tools, such as Git.
9. Excellent problem-solving skills and a keen eye for detail.
10. Strong communication and teamwork skills, with the ability to work effectively with cross-functional teams.

Benefits

All applicants MUST have working Visas or be UK residents and be currently present in the UK.

This is a hybrid role and we can negotiate the terms of your office presence, but for your information, we currently come in 2-3 times a week to the Farringdon office in London.

We have the finest coffee shop on our doorstep. A food market right in front of the office. Access to gym membership, with conditions! Training is catered for as and when needed. Pret coffee subscription included

NO AGENCIES - Please do not attempt to canvas from here.

Salary: from £50,000 subject to qualification.

Viqu has partnered with a leading organisation seeking a Senior Software Developer with strong full stack expertise in C#, JavaScript, REST APIs, and SQL. As a Senior Software Developer, you'll build responsive web interfaces and develop robust backend services, delivering scalable, high-performance solutions. You'll join a fast-paced Agile team, driving new features and maintaining critical syste
Please double check you have the right level of experience and qualifications by reading the full overview of this opportunity below.
Please click on the apply button to read the full job description

Viqu has partnered with a leading organisation seeking a Senior Software Developer with strong full stack expertise in C#, JavaScript, REST APIs, and SQL. As a Senior Software Developer, you'll build responsive web interfaces and develop robust backend services, delivering scalable, high-performance solutions. You'll join a fast-paced Agile team, driving new features and maintaining critical syste.

We want you to #JOINTHEREBELLION!

For 30 years we’ve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd.

We are seeking an experienced Experienced JavaScript Developer (Full Stack) to join our Code team, to help build and support internal and external web applications and APIs to support our game engine team.

The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance. You will be working on building internal tools as well as public facing APIs.

This is primarily a back-end role but we are looking for someone who has experience with both front-end and back-end languages, development frameworks, and third-party libraries. The ideal candidate will be an excellent communicator in order to help other teams fix bugs and resolve issues.

This exciting opportunity can be based out of either of our studios in Oxford or Warwick, offering flexibility, collaboration, and the chance to work with a world-class team! We can provide a relocation package, including moving assistance, temporary accommodation, and full support to ensure a smooth transition to your new environment.

We believe in the power of face-to-face collaboration and encourage working from our studios. However, we understand that flexibility matters, so we’re open to discussing hybrid options based on individual needs.

Key Outcomes:

• Produce performant and well documented code.

• Successfully develop deploy new tools to support our game teams.
• Responsive to bugs and issues as they arise and providing speedy resolution.

Responsibilities :

• Design, build and deploy web applications to support our in-house engine team.

• Maintain and improve existing tools.
• Develop integrations with third party APIs.
• Support our application deployments.
• Communicating with other teams.

Requirements

• Experience with NodeJS, Javascript and TypeScript.
• A knowledge of front end frameworks like Vue and React.
• Experience with databases such as MySQL and no SQL database.
• Familiarity with AWS or equivalent cloud environments.

• Experience with software development tools and version control systems (Git/Perforce desirable).
• Demonstrated capacity to quickly learn new technologies.
• Comfortable modifying/maintaining applications written in other languages (such as PHP) is desirable.
• Experience writing serverless functions (AWS Lambda/Azure Functions) is a bonus.

Benefits

We offer an extensive benefits package to our team including:

• 22 days holidays + Christmas closure (typically 4 days) & Bank holidays (increasing with service at 5 years – one day each year until you reach 31 days)
• Private Medical Insurance, healthcare cash plan, including dental and Vision
• Life Assurance, Income Protection & Critical Illness Cover
• Enhanced Family Leave
• Interest Free, Tax-Free loans
• Enhanced Pension Scheme
• EAP a range of Mental Health and Wellbeing Support
• Plus loads more… including a wide range of discounts, freebies, and social events!

Life at Our Oxford HQ

Our riverside headquarters in Oxford places you a short walk away from the city centre. Renowned for its rich historical backdrop and esteemed educational institutions, Oxford offers a unique blend of tradition and modernity, with its beautiful architecture and green spaces.

Oxford also boasts excellent transport links, making it easy to navigate both the city and the wider country. The city’s train station, just a short walk from our studio, offers frequent services to London, as well as direct routes to major cities like Birmingham, Manchester, and Reading and we also offer free parking at the studio.

Our open-plan office promotes teamwork and innovation, with regular interaction with senior management and other departments, alongside access to free hot drinks, a handy tuck shop onsite and a range of local pubs, cafes and dining options nearby helping make every workday enjoyable!

Inside Rebellion

Whichever team you join at Rebellion we are proud of our open, friendly, and creative atmosphere. We love what we do, and we have fun doing it! As a big indie developer, we have complete creative freedom over our titles which allows us to work on a massive variety of projects across all the major platforms.

Find out more about us here

Our size, stability, and the variety of in-house expertise across multiple industries, makes Rebellion completely unique! We work in our own way, and we celebrate that as the key to our success. We foster an inclusive culture where you are encouraged to be yourself, to express your creativity and your talent. We are people focused and will support you in every way to can be the best at what you do. We recognise the importance of enjoying what you do and having a healthy work-life balance. We offer a friendly, creative, and relaxed working atmosphere, with sensibly managed projects and a wide variety of benefits and development opportunities for all our teams to ensure you are fully supported with your physical and Mental Well-being.

We are actively recruiting for a diverse team and continue to add to our culture of growth and inclusion. Rebellion encourages innovation in all areas, and we look forward to hearing how you can help us to be better. We encourage all demographics of culture, gender, ethnicity, neurodiversity and beyond, because a representative team makes better products.

If you are interested in working at Rebellion, but this role doesn’t sound quite like you, we’re recruiting for a range of positions across the studio and we’re always happy to receive speculative applications via our website. Visit our Careers website to view all our live vacancies: Rebellion: Careers

#LI-Hybrid

JOB SUMMARY

We are looking for a highly motivated Senior Vue.js Developer to join our team.  You will be responsible for evolving and scaling our existing platforms as well as working on new greenfield projects. Mentoring other developers, practising excellent communication and motivation within the team is essential. There is a lot of scope for responsibility and the individual should be comfortable taking ownership of and managing all aspects of the front-end stack. You will join a team of front-end, back-end and database developers to deliver modern Progressive-Web-Applications, Applications and Websites.

ESSENTIAL DUTIES

• Evolving and scaling our existing platforms with informed technical decisions.
• Conceptualizing and developing new, stimulating user-facing features.
• Creating reusable libraries and efficient code for broader team use in future projects.
• Prioritizing the optimization of applications for optimal speed and scalability.
• Managing Pull Requests in alignment with the team's workflow, ensuring project expectations and deadlines are met.
• Refining internal processes to enhance the performance, reliability, and usability of our platforms.
• Identifying and making improvements to any performance-related issues affecting our web and mobile-based applications.
• Upholding stringent security standards for web and mobile applications, promptly resolving and protecting against vulnerabilities.
• Staying in tune with innovations and advancements in JavaScript and applying them to keep our applications highly competitive and adept.
• Mentoring team members in a supportive environment to further their growth and understanding of JavaScript's core concepts and best practices.
• Fostering an atmosphere for innovation and positivity, inspiring team members to deliver their best work consistently.

Requirements

Essential Skills

• Strong understanding of the following technologies:
• ES6 & JavaScript
• Vue.js
• Web markup, including HTML & CSS
• Asynchronous request handling using the likes of REST or GraphQL
• Front-end build tools, such as Vite, Webpack and CLIs
• Git and its related platforms like Github or Gitlabs
• Package management using npm
• Browser rendering behaviour and performance
• Passion for writing quality, high-performance and maintainable code following best practices

Desirable Skills

• Typescript
• Nuxt.js
• Node.js
• Storybook
• CI/CD, Pipeline management, GitHub Actions
• Docker
• Prototyping/Storyboarding
• Graphics editing with the likes of Figma, Photoshop & Illustrator
• Mobile & Responsive design
• Testing tools like Vitest, Jest, Playwright, Cypress

 KEY DELIVERABLES

• Leverage advanced JavaScript techniques to develop high-quality, efficient code, assess coding opportunities, conduct robust code reviews, streamlining codebase, and prototypes to continuously improve performance and user experience. Accurately estimate the timescales for design, development and testing phases to ensure realistic and effective project scheduling.
• Evaluate the potential impact of each change request, proactively communicating any associated risks to project managers and the leadership team.
• Collaborate proactively with the development team to coordinate the seamless delivery of high-quality application code.

• REQUIRED EXPERIENCE / QUALIFICATIONS
• IT professional with 5 years of design and technical background and knowledge
• Proven experience in web design and development
• Analytical and problem-solving skills
• Self-motivated and able to work/travel independently
• Proactive, able to work with a high level of responsibility and autonomy, able to work under pressure
• Flexible in terms of working time with a priority on “getting the job done”
• A good team player who can perform and work on a wide variety of tasks simultaneously

COMPETENCIES/SKILLS

Technical Skills

• Advanced JavaScript expertise
• Empowered decision making
• Strong oral and written communication skills
• Cultivates teamwork and collaboration
• Effective allocation and management of resources

Personal Effectiveness

• Acts with integrity and professionalism
• Demonstrates adaptability and resilience
• Excellent organizational and time management skills
• Sensitivity towards cultural diversity
• Takes a proactive lead, handles queries, manages issue resolution
• Commitment to quality, detail-oriented approach, and a strong work ethic

Interpersonal Skills

• Influences others across all levels
• Foster open communication
• Builds and maintains positive relationships
• Delivers persuasive presentations to senior management

Growth & Innovation

• Challenges existing procedures
• Identifies weaknesses and proposes improvements
• Encourages continuous learning and improvement

The above statements are intended to describe the general nature and level of work being performed by people assigned to this job. They are not intended to be an exhaustive list of all responsibilities, duties, and requirements.