end javascript developer jobs in Sheffield

Are you an experienced JavaScript Developer with a passion for building solutions that power the utilities sector? One of my clients are hiring on a contract basis to help deliver technology that keeps the UK's essential services running smoothly. What You'll Do: - Develop and maintain scalable web applications for utility clients - Work with modern JavaScript frameworks (React, Node.js,...

We are looking for an experienced JavaScript developer with a minimum of 2-3 years experience who is proficient with React.js & Next.js. The primary focus would be on developing user interface components, implementing and executing them following well-known React.js workflows (such as Server Side Rendering). Also ensuring that these components and the overall application are robust, reusable...

Backend Web Developer This is an initial Fixed-term Contract (6-12 months) with the view to make it permanent. Location: Fully Remote (UK) Salary: £38,000 - £48,000 (DOE) The role: We enjoy making the complex simple for our clients. We create websites, campaigns and digital products for professional services clients, arts, fashion, and e-retailers. You’ll be joining an experienced,...

Location: Flexible/Remote - US/Eastern time zone THINKalpha is reshaping the capital markets. Our platform enables generative content using dynamic data. The core of our platform includes financial search, streaming analytics and is accompanied by both data and transactional frameworks. We are currently seeking a talented Front End Web Developer with a strong technical background and a passion...

About Aero A digital experience company, we sit at the intersection of insights, creativity and technology, crafting digital experiences that transform business performance. We’re a small, fully remote team with big ambitions. We work hands-on with our clients, giving our teams genuine ownership of their work. Every project you touch will be seen by thousands of people and will directly...

Excellent opportunity for Front-End Developer looking to join a forward-thinking company producing award-winning software used by leading businesses across the globe. The successful Senior Frond Developer will need to have extensive commercial experience using ReactJS and should be comfortable working to their own initiative but also happy to mentor and offer guidance to the more junior members...

Lead Software Engineer London-based or Remote within the UK (no visa sponsorship) We’re working with a mission-driven energy tech start-up that’s reimagining how power is monitored, billed and delivered. Backed by angel investors, my client is building digital tools that support modern energy infrastructure in markets underserved by traditional utilities. This is a founding role. As the Lead...

Backend Engineer (Python/Django) Hybrid (Sheffield) – £60,000 We are working with a high-growth fintech scale-up who are looking to bring on a Backend Engineer into their growing data team. They are innovating rapidly and looking for top engineering talent to support their next phase of growth. As a Backend Engineer, you’ll play a key role in building and scaling the company’s core payment...

You will be a key player in designing, developing, and maintaining critical backend services. Your expertise in JavaScript and Spring Boot will be essential for creating robust RESTful APIs and event-driven microservices deployed on AWS. We are looking for a developer who is passionate about embedding security, observability, and automation directly into the development lifecycle.

Front-End Contractor (React / Next.js) Location: Remote (UK based candidates only) Contract: Outside IR35 Day Rate: Up to £400 per day I am currently looking for an experienced front-end developer to help deliver key product features at speed for one of my start up clients. You’ll work on high-impact UI components and collaborate with design, backend, and AI teams to create interfaces for...

Senior Backend Engineer | Fully Remote | Full Time Are you a seasoned backend engineer with a passion for building scalable APIs and robust backend systems? We’re looking for a Senior Backend Engineer to join our development team and help shape the future of our platform. What You’ll Do - Design, develop, and maintain high-quality APIs and backend services - Architect scalable software...

· Hands-on experience and proficiency with C# .Net specifically Azure Cloud usage. · Databases: Azure Cosmos DB, Snowflake, Azure Data Factory · Cloud Services: Azure - Azure Functions, Service Bus, Azure Storage, Key Vault · CI/CD: Azure DevOps · Solid understanding of software development methodologies. · Knowledge of RESTful APIs and microservices architecture. · Strong understanding of...

We're a UK based, profitable and fast growing company that began as a small bootstrapped AI startup in 2023. Nowadays, we're a relatively small team (10) of talented individuals located in London, Brighton and Bratislava. In a period of significant growth, we're looking for another talented engineer to help us scale further and allow the company to help even more job seekers save time by...

Go Backend Engineer (Data Platform & APIs) - Northern Ireland (Remote-first) * Salary: £75,000-£150,000 + bonus + benefits About the Company: Our client is scaling an ML-driven data and analytics platform and modernizing their engineering standards. Their current stack includes Python, GoLang, TensorFlow, PyTorch, AWS, and Kubernetes, with a focus on building scalable, ML-driven data and...

Senior Full-Stack Engineer - Go/JavaScript Salary: £80,000 - £90,000 Location: Fully-remote Tech: Go, JavaScript, .NET About the role: We're working with a leading organisation in the legal sector, renowned for their award-winning approach to technology-driven innovation, in support of their efforts to strengthen their growing SaaS team. They are looking for a senior software engineer with...

Leading Sustainable E-Commerce | 35 Million Users | Mid & Senior Back End Engineers | TypeScript/Node/AWS | Up to £100K + Bonus | REMOTE (UK) or 1 Day Per Week (LDN) Company Our client is an extremely well known, digital marketplace focused on sustainable ecommerce. With over 35 million of active users globally, they’re redefining how people buy and sell second-hand fashion, aiming to make the...

You will work alongside a cross-functional team of backend engineers, product managers and data scientists to deliver high-quality, scalable, and reliable solutions that meet the needs of their customers.

You will also have the reassurance of a job guarantee (£25K-£40K) upon completion. Whether you are working full-time, part-time or are unemployed, this package has the flexibility to be completed at a pace that suits you and can be completed in a few weeks or a few months (step 1 to 4 below).

You will also be assigned an expert tutor and a support mentor to help you throughout your training.

You will play a hands-on role in designing and implementing modern applications, integrations, and cloud-based frameworks that help organisations accelerate their digital transformation journeys.

Senior Front-End Software Engineer (React / TypeScript) Location: Remote (1 day per month in Oxford, UK) Type: Permanent | SaaS | Global Tech Company Are you passionate about building exceptional, scalable front-end applications? Our client — a leading SaaS company based near Oxford — is expanding and looking for a Senior Front-End Software Engineer to help shape the future of their...