3,617 Javascript jobs in the United Kingdom

JavaScript Software Engineer - React.js Developer

West Hove, East Sussex offices - 4 days in office, 1 day per week remote

My client are a UK SaaS company building an enterprise scale Data Analytics platform for their global customer base. Theyare looking to recruit a Software Engineer with good experience of building web UIs using React.js

This role will involve developing React applications for existing client systems and multiple new Greenfield projects for their customers, ensuring that their clients and stakeholders are always accessing performant, engaging, well-written software.

This role is working 4 days per week in their lovely offices in West Hove (1 day remote), paying to 60k per annum

As an experienced Software Engineer with good React/TypeScript experience you will work an environment that rewards dedication, hard work and getting stuck right in.

They use React.js & TypeScript with other tools (TailwindCSS) to build highly scalable, performant Web Frontend systems for our platform that provides extremely customisable reporting services on many Terabytes of data every single day for each customer. There are opportunities to work on Full stack projects as well if you want.

This role is open to mid-level and senior level developers and the successful candidate will be passionate about Software Engineering, especially with well written, scalable code.

Skills and experience:

• At least 5 year's commercial experience
• Strong experience of React.js
• Proficiency in TypeScript and / or JavaScript
• Capable using HTML and Tailwind CSS or similar tool
• Developing applications in React including component design and state management for specific use cases
• General understanding of infrastructure as code and CI/CD pipelines and the willingness to learn more
• Basic experience with AWS platform
• Comfortable using version control, primarily Git

Please apply with your CV for immediate interview.

JavaScript Developer

Remote

48k - 55k

Sellick Partnership are currently recruiting a versatile JavaScript Developer with strong experience in Vue.js on the front end and Node.js on the backend. The ideal candidate will be comfortable working across the stack to deliver high-quality, scalable web applications.

Responsibilities:

• Develop and maintain responsive front-end applications using Vue.js.

• Collaborate with designers and backend engineers to create seamless user experiences.

• Build and optimize RESTful APIs and backend services with Node.js.

• Write clean, efficient, and maintainable code following best practices.

• Debug, test, and optimize applications for performance and scalability.

• Participate in code reviews and contribute to team knowledge sharing.

Requirements:

• Proven experience with JavaScript/TypeScript

• Strong hands-on experience with Vue.js

• Backend development experience with Node.js

• Familiarity with REST APIs, authentication, and databases (SQL/NoSQL).

• Proficiency with version control (Git) and agile development workflows.

• Strong problem-solving skills and ability to work collaboratively.

If you are open to a conversation about this opportunity, please apply.

Sellick Partnership is proud to be an inclusive and accessible recruitment business and we support applications from candidates of all backgrounds and circumstances. Please note, our advertisements use years' experience, hourly rates, and salary levels purely as a guide and we assess applications based on the experience and skills evidenced on the CV. For information on how your personal details may be used by Sellick Partnership, please review our data processing notice on our website.

JavaScript Developer

Remote

48k - 55k

Sellick Partnership are currently recruiting a versatile JavaScript Developer with strong experience in Vue.js on the front end and Node.js on the backend. The ideal candidate will be comfortable working across the stack to deliver high-quality, scalable web applications.

Responsibilities:

• Develop and maintain responsive front-end applications using Vue.js.

• Collaborate with designers and backend engineers to create seamless user experiences.

• Build and optimize RESTful APIs and backend services with Node.js.

• Write clean, efficient, and maintainable code following best practices.

• Debug, test, and optimize applications for performance and scalability.

• Participate in code reviews and contribute to team knowledge sharing.

Requirements:

• Proven experience with JavaScript/TypeScript

• Strong hands-on experience with Vue.js

• Backend development experience with Node.js

• Familiarity with REST APIs, authentication, and databases (SQL/NoSQL).

• Proficiency with version control (Git) and agile development workflows.

• Strong problem-solving skills and ability to work collaboratively.

If you are open to a conversation about this opportunity, please apply.

Sellick Partnership is proud to be an inclusive and accessible recruitment business and we support applications from candidates of all backgrounds and circumstances. Please note, our advertisements use years' experience, hourly rates, and salary levels purely as a guide and we assess applications based on the experience and skills evidenced on the CV. For information on how your personal details may be used by Sellick Partnership, please review our data processing notice on our website.

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.

We’re Dayshape—an award-winning software scale-up with big ambitions and the momentum to match. Trusted by Big Four and many other top professional services firms globally, our AI-powered resource management platform is helping organizations to achieve extraordinary results. 

Our enterprise platform stands apart as the only solution that combines advanced AI, real-time project financials, and firm-wide insights to elevate resource management to a strategic function. By driving profitable growth, powering confident decisions, and ensuring satisfied clients and teams—we're helping our customers build strong organizations and careers for the long term.

Why our customers love Dayshape:

• We help professional firms optimize margins and increase revenue, unlocking access to more profitable work. 

• We provide complete operational visibility today and the tools to confidently predict tomorrow. 

• We empower firms to be where top talent wants to work and where top clients want to buy from.

Recognized as Scotland’s fastest-growing tech company in the Deloitte Technology Fast 50 for three consecutive years, we’ve consistently proven our ability to innovate and deliver real impact—and we’re always looking for like-minded people to join us.

At Dayshape, our purpose is to improve people's working lives, and our culture is an important driving force in helping us to do just that. We're a friendly, inclusive, and ambitious team—driven by our values and a shared commitment to success. If you’re ready to join a fast-growing, high-impact company that’s reimagining resource management, then let’s talk.

We've come a long way in a short time, but there's still so much more we can do. We have grand ambitions to make Dayshape the most scalable, flexible and rapid to deploy solution on the market, and we’re not there yet. That’s where you come in. 

As part of our Engineering team, you will be delivering UI-driven features that help our customers schedule thousands of hours of work with ease.  You will help us build scalability, resilience and high performance into the product, all while keeping an eye on UX, accessibility and aesthetics. 

• Develop new features and enhancements 
• Write and upgrade UI components using JavaScript and Vue.js 
• Work with the rest of our engineering team to enhance scalability, performance and maintainability 
• Support our culture of learning, development and teamwork 
• Be involved in the entire life-cycle of features, including idea creation, deployment, and longer term updates and enhancements  

• Demonstrable experience in a similar commercial software engineer role
• A confident JavaScript developer, happy writing both vanilla JS and modern frameworks (ideally Vue.js) 
• Experience working in a product development environment 
• Comfortable writing unit tests and end-to-end automated tests 
• Passionate about shipping a product you can be proud of 
• Well-informed on good software development principles, and able to implement them pragmatically 
• An excellent and kind communicator, able to raise awkward questions kindly, and to recognise when you need help 
• Experience collaborating with others - you will be working closely with engineering, product and QA colleagues 
• Adaptable, and motivated to try/learn new things 
• Great at breaking down large tasks into manageable chunks 
• Able to see the Big Picture - how your decisions affect your colleagues and your users 

• Experience working with agile development teams on large products 
• Experience in C# or a similar language
• Experience working with complex web interfaces with large DOM views 
• Experience writing tests in Jest, Cypress or Playwright 
• Experience with the rest of our stack: SQL Server, and/or Microsoft Azure 
• Experience working in (or with) the Professional Services industry 

• Starting salary between £39,898 and £6,500, depending on experience 
• Earning potential in the Software Engineer salary band up to £ ,500  
• At least £1 00 per year to spend on professional and personal development   
• 33 days' holiday per year (including bank holidays), increasing by 1 day each year to a maximum of 40 days   
• Paid four week sabbatical in your fifth anniversary year on top of your holiday entitlement   
• Enhanced family leave policies   
• Private healthcare and rewards through Vitality   
• Income protection and death in service cover   
• Matched 5% auto-enrolment workplace pension scheme   
• Access to wellbeing offerings, such as our Employee Assistance Programme and a dedicated counselling service   
• Innovation Week twice a year - a chance to experiment and work off-project
• Volunteering time – up to 20 hours a year to participate in volunteer work
• Regular All Hands meeting for inspiration and over-communication   
• Time out of the working week for team socials each month, with a mix of in-person and virtual options: past events include hiking, family BBQs, board games and at-home cocktail classes!   
• Genuinely nice, smart people to work with, who are excited about growing our company 

This is a full-time role (37.5 hours per week). We typically work from 09:00 - 17:30 from Monday to Friday, though we can be flexible around this, just let us know. 

We’re ideally looking for someone in/around Edinburgh, though we’re open to the possibility of this being a remote role (as long as you're in the UK). We're making the most of hybrid working, so you won't need to come into the office everyday (unless you want to!). 

We don't mandate required office time, but we find that most of the team enjoy working from home 3-4 days a week, and come into our office to connect with each other, make use of space, and for meetings. 

Equality of opportunity is more than just a responsibility: we believe it’s a huge advantage to welcome a variety of experiences and perspectives into the team. Diversity is a great asset and, as such, we strongly encourage applications from any background. 

This is your opportunity to really influence how we get things done, and how our product develops to meet our customers’ needs. We're doing well, but there's lots more to do in order to maintain the high bar and pace that we've set. 

If your experience isn't an exact match for this job description, but you have transferrable skills/experience that you think would be a great fit, please outline this in a cover letter. Everyone here is growing personally as the company grows, so if that sounds like something you’d like to be part of, we’d love to see your application. We are also currently hiring across the Engineering department, with roles at different levels - all open opportunities can be found on our careers page:

The deadline for applications is 5pm BST on Friday 3rd October with interviews taking place over the following couple of weeks. 

*Please note the successful candidate for this role will be subject to background checks and will have an opportunity to declare anything to us beforehand* 

Full Stack JavaScript Developer (Mid-Level)

Salary: 65,000 - 70,000 pa (depending on experience) plus benefits, perks and healthcare options

Location: Hybrid / 2 x days per week - Travel to London

Job Type: Permanent

Security Clearance: This role is exclusively open to UK sole nationals who either hold or are eligible for Security Clearance (SC).

Your Role: We are on the lookout for a talented and motivated Full Stack JavaScript Developer to join a dynamic Engineering team. If you're passionate about creating innovative web and mobile applications while ensuring high performance and scalability, this is your opportunity to make an impact!

• Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries such as React, Angular, or Vue.js.
• Collaborating with architects and other developers to design robust, scalable, and secure architectures for new projects and enhancements to existing systems.
• Participating in agile development processes, including sprint planning, daily stand-ups, and retrospectives.
• Conducting thorough code reviews to ensure code quality, performance, and adherence to best practices.
• Contributing to improving our teams' development processes, tools, and techniques to enhance productivity and product quality.
• Working closely with clients and internal teams to understand requirements, provide technical guidance, and deliver solutions that exceed expectations.
• Staying up to date with the latest industry trends and technologies and drive continuous learning and innovation within the team.

Your skills and experience

• Proven experience in full stack JavaScript development, with a strong focus on Node.js and server-side development.
• Experience of at least one leading Node framework (Express.js, Nest.js, Hapi.js)
• Expertise in at least one modern front-end framework (Nest.js, Remix.js).
• Proficiency in HTML5, CSS3, and JavaScript (ES6+).
• Experience with TypeScript and modern development tools and practices.
• Experience of Test Driven or Behaviour Driven Development.
• Knowledge of Cloud-Native development and serverless architectures (AWS, Azure, Google Cloud).
• Familiarity with CI/CD pipelines and DevOps practices.

Security Clearance Requirements:

• You must be eligible for Security Check (SC) clearance.
• Applicants must have resided continuously in the UK for the past 5 years.

If you're ready to take the next step in your career and thrive in a fast-paced, innovative environment, we want to hear from you!