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Top Front End Developer Jobs in Belfast

139+ Job Results
12 Days Ago
Belfast, Northern Ireland
Remote
73 Employees
3-5 Years of Experience
73 Employees
3-5 Years of Experience
Machine Learning • Software
Senior Backend Software Engineer role in a fully remote team focusing on developing new features and optimizing performance in a distributed system environment. Responsibilities include building scalable, portable, and flexible applications, choosing tools, defining architecture, and implementing new features. Required skills include algorithmic thinking, problem-solving, distributed systems design, and communication.
16 Days Ago
Belfast, Northern Ireland
Remote
6,766 Employees
7+ Years of Experience
6,766 Employees
7+ Years of Experience
Software
Join HubSpot as a Senior Software Engineer I in the Frontend Data Sync team. Help build and improve Data Sync, a key component of HubSpot's Operations Hub product. Collaborate with a talented team to solve big problems and enhance customer experience.
10 Days Ago
Belfast, Northern Ireland
Remote
2,030 Employees
7+ Years of Experience
2,030 Employees
7+ Years of Experience
Financial Services
Senior Backend Engineer II role at Monzo, working on building and supporting specific parts of the platform. Collaborating with cross-functional teams to make a difference for customers. Experience with backend technology products and distributed systems is required.
17 Days Ago
Belfast, Northern Ireland
Remote
102 Employees
5-7 Years of Experience
102 Employees
5-7 Years of Experience
Software
As a Senior Frontend React Engineer, you will be responsible for developing websites based on technical and functional specifications, maintaining existing sites, utilising source control tools, testing websites, and contributing ideas for application improvement. You should have a Bachelor's degree in Computer Science, at least 5 years of experience as a Frontend Web Developer, and expertise in React.js and web technologies.
9 Days Ago
Belfast, Northern Ireland
85,636 Employees
5-7 Years of Experience
85,636 Employees
5-7 Years of Experience
Aerospace • Logistics • Security • Software • Cybersecurity
Lead Backend Developer role at Northrop Grumman UK involving designing, developing, and maintaining critical backend infrastructure. Opportunity to work on exciting projects with complex challenges.
12 Days Ago
Belfast, Northern Ireland
Remote
94 Employees
5-7 Years of Experience
94 Employees
5-7 Years of Experience
Software
Seeking a highly motivated Backend Engineer (API) to enhance the technology framework and drive change. The role entails system evaluation, architectural enhancement, and integration of new technologies with existing systems. Requires proficiency in PHP and JavaScript/TypeScript.
17 Days Ago
Belfast, Northern Ireland
443 Employees
3-5 Years of Experience
443 Employees
3-5 Years of Experience
AdTech
Gambling.com Group is looking for a Full Stack Developer to design, develop, and maintain websites, collaborate with team members, troubleshoot technical issues, optimize performance, and stay updated on industry trends. Requires a Bachelor's degree in Computer Science, 3 years of experience, proficiency in HTML, CSS, JavaScript, React, Angular, and PHP, and database knowledge.
19 Days Ago
Belfast, Northern Ireland
Remote
503 Employees
7+ Years of Experience
503 Employees
7+ Years of Experience
Artificial Intelligence • Information Technology
Onfido is looking for a Senior Fullstack Engineer who is passionate about solving interesting problems, enjoys programming, and is experienced in frontend development. Responsibilities include mentorship, guiding junior team members, driving software shipment, and fostering a culture of learning and innovation. The ideal candidate should be a T-shaped, well-rounded software engineer with a bias for action and continuous improvement.
Top Benefits:
Employee Stock Purchase Plan
Family Medical Leave
Fitness Stipend
+8 More
15 Days Ago
Belfast, Northern Ireland
Remote
15 Employees
5-7 Years of Experience
15 Employees
5-7 Years of Experience
Mobile • Software
Seeking an experienced Full Stack Engineer to develop an AI system, including frontend and backend components, RESTful APIs, integration with external systems, database schemas, and CI/CD pipelines. Collaborate with AI/ML engineers and stay updated with emerging technologies.
13 Days Ago
Belfast, Northern Ireland
Remote
145 Employees
1-3 Years of Experience
145 Employees
1-3 Years of Experience
Blockchain • Consulting
Looking for a Backend Developer with 2+ years of experience in developing complex microservices using NodeJS and NestJS. Must have a deep understanding of NodeJS, experience with TypeScript, and be familiar with REST API and GraphQL. Ideal candidate is a team player with good communication skills and a passion for new technologies.
17 Days Ago
Belfast, Northern Ireland
Remote
5-7 Years of Experience
5-7 Years of Experience
Software
Backend Software Engineer at Amplemarket responsible for building the core of the AI-powered sales platform, solving diverse engineering problems, and designing state-of-the-art APIs. Collaborate with cross-functional teams to deliver new features and provide mentorship to other engineers.
11 Days Ago
Belfast, Northern Ireland
Remote
39 Employees
5-7 Years of Experience
39 Employees
5-7 Years of Experience
Fintech
Backend Developer role at EMURGO, a venture arm of the Cardano Blockchain. Responsibilities include developing, deploying, and testing APIs for dApps, collaborating on product design, and improving system availability and scalability. Required skills include NodeJS, network technologies, database principles, and API architecture. Bonus qualifications include experience with AWS, Haskell, containerization, and CI/CD technologies.
Top Benefits:
Dental Insurance
Flexible Work Schedule
Health Insurance
+18 More
16 Days Ago
Belfast, Northern Ireland
Remote
55 Employees
3-5 Years of Experience
55 Employees
3-5 Years of Experience
HR Tech
Looking for an experienced back-end developer to contribute to the 2.0 version of Jibble, built on .NET Core. Responsible for building key integrations to Jibble 2.0 API, participating in the design process, and working with a cutting-edge tech stack. Fully remote work environment.
19 Days Ago
Belfast, Northern Ireland
Remote
1,029 Employees
1-3 Years of Experience
1,029 Employees
1-3 Years of Experience
Marketing Tech
The Web Developer at Marigold is responsible for delivering customer-focused projects, troubleshooting issues, and translating business use-cases into technical data requirements. They must have experience in SQL, HTML, CSS, JavaScript, and more, and collaborate with local and remote teams. English fluency is required with Dutch as a nice-to-have.
13 Days Ago
Belfast, Northern Ireland
27 Employees
7+ Years of Experience
27 Employees
7+ Years of Experience
Artificial Intelligence • Software
As a Senior Software Engineer, you will be developing innovative applications using AI capabilities to enhance user experiences and streamline communication. Collaborate with cross-functional teams to develop key features, benchmark, analyze, and optimize web applications for scalability and security.
14 Days Ago
Belfast, Northern Ireland
Remote
160 Employees
3-5 Years of Experience
160 Employees
3-5 Years of Experience
Healthtech • Other • Software
The full stack Senior Engineer at Nomad Health will work on building product and platform features to improve performance and user experience. Responsibilities include defining best practices for clean code, owning architecture, providing mentorship, and contributing to technical decisions. Qualifications include 4+ years of full stack development experience, strong object-oriented design principles, and proficiency in Python, JavaScript, TypeScript, React, and REST API development.
Top Benefits:
401-K
Commuter Benefits
Company Equity
+43 More
20 Days Ago
Belfast, Northern Ireland
Remote
578,950 Employees
3-5 Years of Experience
578,950 Employees
3-5 Years of Experience
Big Data • Cloud • Logistics • Machine Learning • Retail
Seeking a Senior Software Engineer - React/ReactNative to deliver associate-centric people experiences within the People Technology and Services organization. Responsibilities include software development, troubleshooting, expertise application, business solution implementation, and compliance with company standards.
Top Benefits:
401-K
Commuter Benefits
Company Equity
+21 More
20 Days Ago
Belfast, Northern Ireland
Remote
578,950 Employees
7+ Years of Experience
578,950 Employees
7+ Years of Experience
Big Data • Cloud • Logistics • Machine Learning • Retail
Join as a Staff Software Engineer specializing in ReactJS, leading the design and implementation of web applications, mentoring junior developers, and driving innovative solutions in a collaborative environment at Walmart Global Tech.
Top Benefits:
401-K
Commuter Benefits
Company Equity
+21 More
16 Days Ago
Belfast, Northern Ireland
Remote
1,004 Employees
3-5 Years of Experience
1,004 Employees
3-5 Years of Experience
HR Tech
Join Remote, a global remote organizations solution, as a Backend Engineer working on building features, tools, APIs, and integrations using Elixir and Postgres. Enjoy complex challenges, impact on business growth, freedom in work organization, competitive salary, and a supportive work environment.
21 Days Ago
Belfast, Northern Ireland
Remote
170 Employees
3-5 Years of Experience
170 Employees
3-5 Years of Experience
Fintech • Mobile • Payments • Software
Backend Engineer role at SQUIRE on the Payments product team, responsible for building and maintaining high-quality product features for service applications using Node.js. Collaborate with the team to ensure seamless integration with frontend and mobile applications. Participate in code reviews and troubleshoot software defects.
Top Benefits:
401-K
401-K Matching
Company Equity
+38 More
23 Days Ago
Belfast, Northern Ireland
Remote
504 Employees
3-5 Years of Experience
504 Employees
3-5 Years of Experience
Edtech
Seeking a Senior Full Stack Software Engineer to develop innovative web applications for enhancing the core learning experience at DataCamp. Responsibilities include contributing to technical direction, building user-centric solutions, and improving existing learning features. Requires 4+ years of web development experience using TypeScript, ReactJS, GraphQL, and NodeJS.
18 Days Ago
Belfast, Northern Ireland
Remote
15 Employees
5-7 Years of Experience
15 Employees
5-7 Years of Experience
Artificial Intelligence • Insurance
We are looking for a Senior Backend Engineer to join our team and work on cutting-edge technology, including NLP, firmographic data, and entity resolution. You will be responsible for solving interesting problems at the intersection of large and performant data pipelines, distributed systems, machine learning models, and robust infrastructure. We value excellent development skills and offer competitive salary and significant equity options.
17 Days Ago
Belfast, Northern Ireland
Remote
900 Employees
7+ Years of Experience
900 Employees
7+ Years of Experience
Software
Senior Backend Engineer role at Mimir focusing on maintaining and optimizing telemetry databases and working on large-scale metrics processing. Remote position with international team collaboration and emphasis on open-source contributions.
20 Days Ago
Belfast, Northern Ireland
Remote
1,465 Employees
3-5 Years of Experience
1,465 Employees
3-5 Years of Experience
Software • Cybersecurity
Backend engineer role in the B2B Enterprise team at NordPass, responsible for writing clear and well-tested code, creating APIs, and contributing to technical decisions and tasks. Opportunity to work on developing improvements and new features for enterprise clients.
19 Days Ago
Belfast, Northern Ireland
Remote
2,030 Employees
3-5 Years of Experience
2,030 Employees
3-5 Years of Experience
Financial Services
Backend Engineer role at Monzo focusing on collaborating across disciplines to test hypotheses and make a difference to customers. Working in a squad alongside various team members to build and support a particular part of Monzo. No formal qualifications required for engineering roles. Seeking candidates with strong backend experience and a product mindset.
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