64 front end developer jobs found

Outlier helps the world’s most innovative companies improve their AI models by providing human feedback. Are you a world-class front-end developer or web designer who wants to help shape the future of AI? We collaborate with leading AI organizations to train large language models—teaching them how to design and code like the best front-end engineers and designers in the world. Our projects focus on helping generative AI improve its understanding of front-end technologies, UI/UX principles, and modern web standards. This is a rare opportunity to put your coding and design skills to work in training cutting-edge AI systems—no prior experience with AI is required. About The Opportunity Outlier is looking for exceptional front-end developers and designers to help train generative AI models. This freelance role is fully remote and offers flexible hours—you can work whenever works best for you. You may contribute your expertise by… Creating and answering...

SC Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks.  Please note, due to the exceptional requirements of this position, (and speed at which we require a postholder in situ), preference may be given to candidates who meet all of the essential criteria and hold active security clearance.    Developer for climate data quality control system interface You will be tasked with improvement and possible redesign of the legacy web-based user interface currently used by the Met Office for data quality assurance for international weather station data. The existing user interface is web based and written in a combination of HTML, SQL, Perl, CSS and Shell script, with code managed on GitHub. The role is essentially to convert current code to Python.   Functionality required includes but is not limited to:...

Job Title: Senior UI Developer (React.js) Location: LEEDS Employment Type: Full-time Experience Level: 5+ years About the Role: We are seeking a highly skilled Senior UI Developer with deep expertise in React.js to lead the development of scalable and high-performance user interfaces for our web applications. You will work closely with UX designers, product managers, and backend engineers to create modern, intuitive, and responsive front-end experiences. Key Responsibilities: Design and implement high-quality, reusable, and scalable UI components using React.js (v16+ or latest). Lead front-end architecture decisions and advocate for best practices in performance, security, and maintainability. Collaborate with design and product teams to translate wireframes and visual designs into functional UI. Optimize applications for maximum speed and scalability across browsers and devices. Drive the adoption of modern development workflows...

Job Title: Senior UI Developer (React.js) Location: LEEDS Employment Type: Full-time Experience Level: 5+ years About the Role: We are seeking a highly skilled Senior UI Developer with deep expertise in React.js to lead the development of scalable and high-performance user interfaces for our web applications. You will work closely with UX designers, product managers, and backend engineers to create modern, intuitive, and responsive front-end experiences. Key Responsibilities: Design and implement high-quality, reusable, and scalable UI components using React.js (v16+ or latest). Lead front-end architecture decisions and advocate for best practices in performance, security, and maintainability. Collaborate with design and product teams to translate wireframes and visual designs into functional UI. Optimize applications for maximum speed and scalability across browsers and devices. Drive the adoption of modern development workflows...

About the Role: We are seeking a highly skilled Senior UI Developer with deep expertise in React.js to lead the development of scalable and high-performance user interfaces for our web applications. You will work closely with UX designers, product managers, and backend engineers to create modern, intuitive, and responsive front-end experiences. Key Responsibilities: Design and implement high-quality, reusable, and scalable UI components using React.js (v16+ or latest). Lead front-end architecture decisions and advocate for best practices in performance, security, and maintainability. Collaborate with design and product teams to translate wireframes and visual designs into functional UI. Optimize applications for maximum speed and scalability across browsers and devices. Drive the adoption of modern development workflows including CI/CD, testing strategies, and code reviews. Mentor junior developers and contribute to the continuous improvement of UI...

Job Description: We are looking for a Mid-Level Java Developer with 3 to 5 years of experience in Java, Spring Boot, Microservices, and AWS . The ideal candidate will be responsible for developing, enhancing, and maintaining scalable backend applications while ensuring high performance and security. Key Responsibilities: Develop and maintain backend services using Java and Spring Boot . Design and implement microservices-based architectures for scalable applications. Build and optimize RESTful APIs for seamless communication between services. Work with AWS cloud services for deployment, monitoring, and scalability. Ensure high availability, security, and performance of applications. Collaborate with cross-functional teams , including front-end developers, DevOps, and business stakeholders. Participate in code reviews, debugging, and performance tuning . Follow best coding practices, CI/CD principles, and Agile methodologies ....

UI/UX Developer - Law - London based with occasional office visits - PAYE Contract Are you a passionate and confident UI/UX Developer ready to make a significant contribution working for one of the UK's fastest growing Financial Services Consultancies? Then read on! MHC Overview: MHC are an award-winning IT and Business Consultancy, specialising in Change Management initiatives, which we deliver working in a collaborative way with our Clients. We are hiring a UI/UX Developer to join us for a brand new client project. Please note, this is a hands-on Development role. Key Responsibilities: User Interface Design: Create visually appealing and intuitive UI components for web and mobile applications. User Experience Design: Conduct user research, develop user personas, create wireframes, prototypes, and user flows, and perform usability testing. Collaboration: Work closely with cross-functional teams, including developers and product managers, to bring...

We are looking for a Backend Developer to join on a 2-month initial contract. This role is hybrid - once or twice in central London office Responsibilities: Design, develop, and maintain RESTful APIs and common modules using NestJS and NodeJS Architect scalable, maintainable, and secure Back End systems Write clean, well-documented, and testable code using TypeScript Collaborate with Front End developers, architects, DevOps, QA, and product managers Optimize application performance and troubleshoot issues Implement and maintain modules and shared packages for cross cutting concerns - logging, error handling, API handling, etc. Apply best practices in coding, architecture, and agile methodologies Lead and mentor junior and mid-level developers Participate in code reviews and technical discussions Requirements: 5+ hands-on experience in Back End NodeJS API and module development 3+ hands-on experience working with NestJS...

Job Description: We are looking for a Mid-Level Java Developer with 3 to 5 years of experience in Java, Spring Boot, Microservices, and AWS . The ideal candidate will be responsible for developing, enhancing, and maintaining scalable backend applications while ensuring high performance and security. Key Responsibilities: Develop and maintain backend services using Java and Spring Boot . Design and implement microservices-based architectures for scalable applications. Build and optimize RESTful APIs for seamless communication between services. Work with AWS cloud services for deployment, monitoring, and scalability. Ensure high availability, security, and performance of applications. Collaborate with cross-functional teams , including front-end developers, DevOps, and business stakeholders. Participate in code reviews, debugging, and performance tuning . Follow best coding practices, CI/CD principles, and Agile methodologies ....

UI/UX Developer - Law - London based with occasional office visits - PAYE Contract Are you a passionate and confident React Developer ready to make a significant contribution working for one of the UK's fastest growing Financial Services Consultancies? Then read on! MHC Overview: MHC are an award-winning IT and Business Consultancy, specialising in Change Management initiatives, which we deliver working in a collaborative way with our Clients. We are hiring a UI/UX Developer to join us for a brand new client project. Key Responsibilities: User Interface Design: Create visually appealing and intuitive UI components for web and mobile applications. User Experience Design: Conduct user research, develop user personas, create wireframes, prototypes, and user flows, and perform usability testing. Collaboration: Work closely with cross-functional teams, including developers and product managers, to bring designs to life and ensure they meet the needs of...

Job Description: We are looking for a  Mid-Level Java Developer  with  3 to 5 years of experience  in  Java, Spring Boot, Microservices, and AWS . The ideal candidate will be responsible for developing, enhancing, and maintaining scalable backend applications while ensuring high performance and security. Key Responsibilities: Develop and maintain backend services using  Java and Spring Boot . Design and implement  microservices-based architectures  for scalable applications. Build and optimize  RESTful APIs  for seamless communication between services. Work with  AWS cloud services  for deployment, monitoring, and scalability. Ensure  high availability, security, and performance  of applications. Collaborate with  cross-functional teams , including front-end developers, DevOps, and business stakeholders. Participate in  code reviews, debugging, and performance tuning ....

We are a market leading Mortgage Broker, growing and developing exciting propositions and investing in front end technology. We have developers and web designers, but I am wanting to partner longer term with someone who can bring an A.I. skillset to the table, and benefit hugely from an opportunity to launch something of there own. We have an aggressive road map to build and having previously worked with a developer who built a proprietary WhatsApp AI chatbot using OpenAI and GoHighLevel (GHL), integrated with n8n automation flows - we want someone to come in, and own this IP internally. We want to rebuild the system entirely under our own control and IP. We are looking for a technical problem solver who can take over this project, recreate the chatbot workflows , and integrate everything into our GHL and WhatsApp setup, using our existing chat data and strategic direction. Objectives: Rebuild the AI chatbot (based on OpenAI GPT models) using: Our own OpenAI...

Must have: Java, Microservices, Spring boot, Linux and shell scripting, build tools (Maven /Gradle / Ant) Experience in working with Cloud-based development like AWS ROLE DETAILS Developer in large projects across a global team of developers and risk managers Performance tune applications to improve memory and CPU utilization Build internal and external reporting for the output of risk metric calculation using data extraction tools, such as SQL, and data visualization tools Utilize web development technologies to facilitate application development for front end UI used for risk management actions Develop software for calculations using databases like Snowflake, Sybase IQ and distributed HDFS systems Interact with business users for resolving issues with applications Design and support batch processes using scheduling infrastructure for calculation and distributing data to other systems SKILLS AND EXPERIENCE Bachelor’s degree in Computer Science,...

Company: iZone Software Limited Location: Remote Contract Type: Contract Salary: negociable Contact: Please apply directly via LinkedIn. Strictly no recruiters.   iZone Software Limited is a leading provider of next-generation bridging loan software for lenders. Our powerful, cloud-based platform supports the entire lifecycle of a bridging loan—from initial terms and application through to case management and redemption. We cater to a wide variety of interest types and financial products, offering unmatched flexibility for any business model or distribution strategy. Our innovative solutions are driven by deep industry insight and are supported by project managers with hands-on experience in financial services.   Role Description We are currently looking for a Remote PHP Developer to join our team on a contract basis. This role is suited to a self-motivated developer with strong back-end skills and a solid...

Full job description We’re looking for a talented FREELANCE Laravel Developer to work remotely on exciting new features, tools, and internal products that support our growing community. Important: If you are in a full time employment then do not apply for this job. Job Description We are seeking a skilled and experienced Freelance Laravel Developer who can independently build and manage web applications using the Laravel framework. This is a full-stack role requiring strong backend, API development, and front-end experience. You must be comfortable working on projects from start to finish with minimal supervision. Responsibilities Develop and maintain scalable web applications using Laravel (PHP) Build and integrate RESTful APIs for third-party services Implement front-end components using Laravel Blade , HTML, and CSS Integrate payment gateways such as Stripe and PayPal Optimize performance, troubleshoot issues,...

Automation Engineer for Amazon Image-Stack Pipeline (No-Code / Low-Code) Project title: Build an AI-Driven Amazon “Image Stack” & A-Content Generator (PhotoRoom + GPT-Image-1 + Canva + SP-API) 1. Background We operate a London-based Amazon agency and currently hand-craft gallery images (main image + 7 thumbnails) and A-Content for every SKU. We’ve mapped out a fully automated pipeline that stitches together: - PhotoRoom API for background removal - OpenAI gpt-image-1 for lifestyle back-plates & vector icons - Canva Connect API to drop assets into pre-built templates and export 2 000 px PNGs - AWS Rekognition for policy QA - Amazon SP-API (Uploads + Listings Images + A+ Content) to push assets live - Google Sheets API as the SKU queue - Slack Webhooks for status pings All proof-of-concept code runs locally; now we want a clean, production-ready build in Replit or a no code tool (Python 3.11) with proper error handling and...

Synkd, is a leading platform that looks to help with work life balance and upskill users digitally via a single platform. Originally a marketing platform (marketing.synkd.life) where customers can run cross channel campaigns, we have recently shifted to help users and companies digitally transform. Synkd counts over 4500 premium publishers, Global advertisers and their agencies as customers. We are looking to hire a FULLSTACK Developer to work for one month and help address bugs before we go live. This is 100% remote role and using one of our company development machines via anydesk. If this is not for you, please do not apply Key responsibilities: Work on mainly backed tasks inc API creation Evaluate and improve front end User experience Desired skills and experience (MUST be available Full Time for one month) 2 years React, Angular, Typescript experience Backend use of GraphQL with a Prisma Schema and Node.JS Database experience of...

CACI Network Services is a rapidly expanding specialist IT and Networks consultancy offering a wide variety of opportunities to work within challenging and exciting environments with our major clients in Global Media, Banking, Government, Telecoms & Utilities. Project Overview: Our customers are in a transformative journey to modernize their network infrastructure. This project aims to enhance security, scalability, and agility while ensuring compliance with regulatory requirements. The team will play a pivotal role in this initiative, focusing on device onboarding, certification, configuration management, and compliance reporting. We're looking for talented developers to join our team and contribute to the success of driving innovation and excellence in our customers network infrastructure. Essential Technical Skills: Front End: Angular, TypeScript Back End: Java, Python, Spring Boot Database: MongoDB, PL/SQL,NOSQL API Development: RESTful APIs...

Remote Mid-Weight WordPress Developer Insight Consultancy are a small but busy WordPress agency committed to delivering top-notch, custom-built websites for our diverse range of clients. We are looking for a passionate and skilled Mid-Weight WordPress Developer to join our team and contribute to our mission of creating bespoke digital experiences. We are based in Leicester, but our team works remotely from locations across the UK. The role is fully remote, but if you are based near or around Leicester, our office is open for you to work in if you wish. Full time, part time AND freelance applications are welcomed. Role overview As a Mid-Weight WordPress Developer, you will be responsible for building new websites using custom theme development (we don’t use page builders), working closely with our design team to bring creative visions to life. You will work within a total core team of 10, with the support of additional freelancers and interns. The role...

We are looking for an experienced Full Stack Developer with a strong emphasis on backend development . You should be comfortable working across the stack, with the ability to contribute to Front End UI when needed and to engage in thoughtful design discussions. The core of the role involves building and maintaining a cloud-native web service for data ingestion , acting as an identity store between HR systems and SailPoint. Experience with Azure , C#/.NET , and SQL Server is essential, along with strong familiarity with GitLab pipelines. Key Responsibilities: Develop and maintain Back End services using C#/.NET 8 and SQL Server Build and support UI components (primarily in JavaScript ) for the web service Work within a cloud-native Azure environment Manage and deploy via GitLab DX1 pipelines Collaborate on architecture and design decisions Contribute to and challenge web design decisions when needed