Mobile application developer jobs in United Kingdom

Full-Stack (Angular + UX Focus) Full-time | Hybrid | Startup Environment Location: Central London Job Summary We’re looking for a motivated and curious Full Stack Engineer to join our early-stage startup based in London. We’re building an industry-specific productivity management tool, AI-powered, supported by strong investment and high-profile partners. In this role, you’ll work closely with the founding team to design and build user-friendly, responsive interfaces for our B2C productivity management web application. This is an exciting opportunity to contribute to a groundbreaking initiative and help shape the future of productivity. You’ll gain hands-on experience, contribute to real features, and grow your skills in a fast-paced, collaborative environment. From refining user journeys to implementing front-end components using modern tools and frameworks, your work will have real impact. What You’ll Do • Build and maintain responsive, user-focused interfaces using Angular and TypeScript, • Design and implement scalable full-stack architectures from scratch, • Develop backend services using Encore TS (experience with Express is highly transferable and sufficient), • Build and consume APIs, ensuring clean data flow between front-end and back-end, • Work with PostgreSQL and Prisma for data modeling and persistence, • Deploy and maintain services on Google Cloud Platform (GCP), • Build and maintain mobile applications using Capacitor, • Style applications using Tailwind CSS (and maintain existing SCSS where needed), • Write clean, maintainable, and efficient code across the stack, • Debug, troubleshoot, and optimize performance for a seamless user experience, • Collaborate closely with the founding team on product decisions, feasibility, and timelines, • Use Git for version control and collaborative development, • Write basic tests to ensure reliability of components and features What We’re Looking For • Experience as a Full-Stack Developer, • Hands-on experience with:, • Angular & TypeScript, • Express.js (or similar Node.js frameworks), • PostgreSQL, • Prisma, • Tailwind CSS, • Google Cloud Platform (GCP), • Capacitor for mobile development, • Comfortable working across both front-end and back-end codebases, • Experience working with APIs and structured data, • Familiarity with Git and common version control workflows, • Proactive, curious, and comfortable working in a small, fast-moving startup team Bonus Points • Experience with Encore TS, • UX or design sensibility, especially for productivity tools, • Familiarity with Figma or similar design tools, • Interest in accessibility and inclusive design, • Experience building personal, freelance, or startup projects Reporting: This position will be reporting directly to the founder. Salary and Benefits: To be discussed during the interview process.

We are a small London startup with the ambition to change education with ML-powered tutoring. Our flagship product is a mobile application for teaching English to intermediate and advanced learners. We’re on the verge of solving one of the biggest challenges in education – making high-quality, personalised learning accessible to everyone. What was once technologically impossible is now within our grasp. We’re looking for a Senior Full Stack Developer to join our growing development team. What you will do 🚀 • Design and implement a new high-scale system for millions of users., • Build convenient CI/CD processes and testing pipelines to support quick iterative development and system stability., • Work on ML model development with our team to build robust data pipelines and deploy ML models., • Analyse large corpora of data and build real-time recommendation systems., • Work with large amounts of data in different modalities (text, video, images, audio), • Work in a very cross-functional team, side by side with mobile developers, product managers, ML engineers, and designers. Essential skills 🙏 • Build high-load applications from scratch., • Deep knowledge of AWS., • Architecture planning and estimation skills (time, users, traffic, money, algorithmic complexity, cache, etc.)., • Architecture scalability and simplicity., • Research skills (new APIs, libraries, services, and their estimations)., • CI/CD automation pipelines., • Proficiency with Terraform and Docker., • SOLID, KISS principles, decomposition principles, and resolving monolith vs. microservices trade-offs., • Experience with SQL and NoSQL databases., • Best practices in building scalable mobile APIs (REST, HTTPS, etc.)., • Good principles of security management (secrets, protocols, etc.)., • Experience with some Python web frameworks (Django, Flask, FastAPI, etc.). Desirable Skills 👌 • Can speak, or learning to speak, more than one language, • Experience with real-time databases., • Experience with in-memory databases., • Experience with frontend frameworks., • Experience in developing educational products., • Knowledge-sharing experience (tech talks, articles, YouTube videos, etc.)., • Experience (even non-production) with different types of programming languages: interpreted, compiled, with garbage collection, manual memory management, reference counting memory management, etc. What we can offer ✨ • A real-deal startup adventure: you'll be hopping on a major project while it's still in the works!, • A crew all about people and products., • Work from our London office., • Freedom to suggest, implement, and test ideas., • Unlimited learning & development budget., • We also offer substantial relocation assistance to support your move, if required. Interview Process 🧪 • Intro call, • 3 technical interviews, which will all cover, • Problem Solving, • Architecture Design and Product Design, • Domain/Platform Knowledge After all interviews, we would like to invite you to work with us in our London office for 1-2 paid test days. If everything goes well, we will make an offer to the successful candidate.

Senior UI Developer About the Company: Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. We have been meeting customers wherever they are in the digital lifecycle and helping them outperform their competition through speed and innovation. Apexon brings together distinct core competencies – in AI, analytics, app development, cloud, commerce, CX, data, DevOps, IoT, mobile, quality engineering and UX, and our deep expertise in BFSI, healthcare, and life sciences – to help businesses capitalize on the unlimited opportunities digital offers. Our reputation is built on a comprehensive suite of engineering services, a dedication to solving clients’ toughest technology problems, and a commitment to continuous improvement. Backed by Goldman Sachs Asset Management and Everstone Capital, Apexon now has a global presence. Your responsibilities will include translation of the UI/UX design wireframes to actual code that will produce visual elements of the application. You will work with the UI/UX designer and bridge the gap between graphical design and technical implementation. You are expected to take an active role on both sides and define how the application looks and how it works. Responsibilities: -7-9 years of experience in Developing and implementing UI components using React.js -Collaborating with cross-functional teams to design and ship new features -Building reusable components and front-end libraries for future use -Translating designs and wireframes into high-quality code -Optimizing components for maximum performance across various web browsers -Staying up to date with the latest industry trends and technologies -Troubleshooting and debugging issues to ensure smooth user experiences -Participating in code reviews to maintain code quality and consistency Qualifications & Skills: -A degree in computer science, software engineering, or a related field -Proficiency in React.js and its core principles -Strong JavaScript, TypeScript HTML5, and CSS3 skills -Experience with popular React.js workflows (such as Redux) -Familiarity with RESTful APIs and integration -Knowledge of modern authorization mechanisms, such as JSON Web Tokens -Understanding of front-end build tools and pipelines -Excellent problem-solving and communication skills -A strong attention to detail, and a passion for delivering high-quality code -Adaptability to changing project requirements and priorities -Good to have experience with -Experience with version control systems (e.g., Git)

Mid-Level Software Engineer (React Native) Location: Hybrid – London About Nando’s & Our Values At Nando’s, everything we do is guided by our five values: Pride – We take pride in our work and aim for excellence. Family – We look out for each other and build strong relationships. Passion – We bring energy, purpose, and love to what we do. Integrity – We do the right thing, even when no one’s watching. Fun – We enjoy the journey and create moments that make people smile. These values inspire how we build products, how we treat each other, and how we support our Nandocas across the business. About the Role The Digital Workplace Experience (DWE) team crafts the internal digital tools that empower every Nandoca to learn, grow, connect, and thrive. We’re looking for a Mid-Level Software Engineer who’s excited to learn, collaborate, and make a meaningful impact—someone who embodies our values in the way they build and the way they work with others. Your early focus will be on helping to build and scale Nossa Casa, our brand-new Nandoca mobile and web application—plus the APIs and design system that power it. This is a role for someone who is curious, proactive, and driven to develop their skills with the support of a warm and collaborative team. About the Digital Workplace Experience (DWE) Team We’re a cross-functional team shaping the digital fabric of life at Nando’s. We: • Build beautiful, simple and inclusive digital experiences used by thousands of Nandocas, • Create and maintain internal web and mobile apps, design systems, APIs, and platform services, • Act as champions of engineering excellence, good design, accessibility and AI-assisted development, • Work closely with People, Ops, Product and Design to solve real-world problems in our restaurants, • Bring Nando’s values alive in our delivery: Pride in our craft, Passion for learning, working as a Family, acting with Integrity, and keeping things Fun What You’ll Be Working On Your first major mission: Helping to implement Nossa Casa / Nandoca Mobile You’ll contribute to the codebase across React Native (web), React (web), APIs, and shared design systems. Alongside the team, you’ll work with: • Node.js / Express web API development, • OpenAPI specification–driven development (AI-assisted), • Storybook design system development and component libraries, • Figma designs → interactive UI components, • Docker containerisation and container-based deployment, • Terraform IaC for deploying APIs into Google Cloud Platform (GCP), • Claude CLI and other AI developer tooling (bonus experience), • Modern engineering practices, with strong mentorship and peer support This is a safe space to learn. You don’t need to know all of these today just bring curiosity and a hunger to grow. What We’re Looking For Essential Experience • 3+ years continuous experience with React Native, • 2+ years continuous experience with React, • Comfortable collaborating with designers, PMs, and engineers, • A proactive, curious engineer who takes pride in quality, • Someone who brings passion and positivity to their craft, • A team player who supports others and fosters family spirit, • High integrity, empathy, and respect for diverse perspectives, • A willingness to experiment, learn, and have fun doing it Nice to Have (or Willing to Learn) • Node.js / Express API development, • OpenAPI-driven design, • Storybook + Figma pipelines, • Docker, • Terraform, • Deploying APIs to GCP, • Claude CLI workflows (Atlassian, Figma, Storybook, Context7), • AI-assisted workflows and spec-driven development Why Nando’s? • A people-first culture grounded in warmth and belonging, • Inclusive engineering teams where your voice is heard, • Psychological safety, mentorship, and room to grow, • Technical ownership with the support to build confidence, • Time to learn new skills across design, dev, and cloud, • Real impact your work improves daily life for thousands of Nandocas, • Flexible hybrid working, • And of course… free Nando’s Here, you’re not just building software you’re helping build the digital home for the entire Nando’s family. If This Sounds Like You… We’d love to hear from you. If you don’t tick every single box but feel excited by the mission and aligned with our values, we encourage you to apply. Passion and potential go a long way at Nando’s.

Software Engineer / Developer (Full Stack Java) London / WFH to £100k Are you Java technologist? You could be progressing your career in a hands-on, impactful, Software Engineer role, working on a "tech for good" product that is helping to drive efficiencies for the NHS, the core product is a highly complex real-time shift rota application, hosted on AWS and available via the web or mobile device (iOS / Android). As a Software Engineer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll focus on designing and developing scalable backend Java services and REST APIs and build responsive, as well as writing and optimising SQL database queries and occasional front end work, creating user friendly interfaces using Angular (v15+). You'll input into technical discussions and decision making, as a senior member of a small team where you'll be able to influence best practice and technology choices. Location / WFH: You'll join colleagues in the London, City based offices 3-4 days a week with some flexibility to work from home 1-2 days. About you: • You have strong Java backend software development skills including Spring Boot, • You have experience with relational databases and SQL query writing, • You have some front end experience with JavaScript, Angular or React, • You have a strong understanding of REST APIs and real-time systems, • You're comfortable working with legacy Ruby, • You have a strong knowledge of software engineering best practices and Agile development methodologies, • You're collaborative and pragmatic with great communication skills, happy to mentor and develop others What's in it for you: As a Software Engineer / Developer you will receive a competitive package: • Salary to £100k, • Pension, • 25 days holiday, • Excellent career progression to Technical / Team lead Apply now to find out more about this Software Engineer / Developer (Full Stack Java) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

About Us: AmpsTek – a global technology leader since 2013 – is transforming how businesses approach technology and staffing solutions. Founded by seasoned technology leaders across the UK, Europe, APAC, North America, and LATAM, and with registered offices in 30+ countries, we deliver exceptional service, scalable solutions, and measurable impact. With a portfolio of 200+ clients and millions of users across web and mobile platforms, we empower businesses to innovate, grow, and succeed. Join our team and be part of a dynamic, growth-oriented organization that values talent, creativity, and results. Role Title: Guidewire Consultant Location : London, UK (Onsite 5 days/week) Contract (Inside IR35) Job description · Role : Guidewire CC Developer · Work in Implementation, Upgrade and support project with on-prem, GWCP and private Cloud hosted version of for Guidewire xCenters (version 10.x & cloud versions) · Manage client co-ordination and deep functional or insurance (P&C) industry expertise especially on Personal and/or commercial lines. · Lead L2/L3/L4 support teams working across India, US & UK. · Lead distributed teams working across 3 different time zones effectively handle production defects, arresting defect inflow and maintaining a healthy trend in issues management · Ensure near 24/7 environment availability for production and non-production environments, exceeding customer service level agreements · Perform Root Cause Analysis (RCA) and identify identify systemic defect patterns, areas of opportunities to improve and control flow of defects. Define & Socialize plan of action to eliminate and control defects · Enhance application logging standards across Guidewire services to achieve faster MTTR through proactive alerting & anomaly detection. · Manage centralized monitoring & observability dashboards for real-time health tracking. Experience Requisite Total Guidewire Experience: 8+ years ClaimCenter Experience: 5+ years Must be Guidewire Certified Developer – preferably ACE certified Must have Skills · Domain Expertise: o Good experience in Property and Casualty insurance domain o Strong understanding of Policy, claim and Billing life cycles and transactions in Guidewire systems · Guidewire Skills: o Strong understanding of Guidewire xCenters (version 10.x & cloud versions) o Working Experience across other Guidewire centers and integration gateway o Strong working experience of implementing GUnit automation framework for business rule validation o Mastery at execution of Guidewire recommended best practices and Surepath methodology · Configuration Expertise: Hands-on experience with Guidewire xCenters (version 10.x & cloud versions) configuration including: o Workflows o Data Model o Rules o Entity Creation/Modification o Benefit Management o PCFs customization o Validations o Widgets and their attributes o Integration Mechanisms o Guidewire Data Model · Customization & Integration: o Sound knowledge of Guidewire xCenters (version 10.x & Cloud) customization and integration (Intra and Inter system integration) using REST and SOAP APIs · Technical Skills: o Experience with batch processes, Guidewire Messaging framework, and OOTB plugins o Familiarity with Infra concepts and deployment architecture (WMB, WAS, and Apache) o Strong knowledge on Software architecture and design in Guidewire Ecosystem o Enforcing the Testing Pyramid with Unit Tests (GUnit), API & Integration Testing and UI Regression (targeted) o Implementing automated regression tests to reduce release risk and cycle time o Strong expertise in Gosu, Core Java, SQL o Ability to work with different databases write SQL queries for data analysis · SDLC / Project Management: o Implementing structured SDLC with CI/CD controls. o Working experience in implementation and AMS programs o Experience with defect triaging, estimation, stakeholder management, and application enhancements. o Ability to lead Team and manage client stakeholders o Experience with Git repository, Jira and ServiceNow · Additional Skills: o Informatics experience (working with information technology systems) is a plus · Soft Skills: o Excellent communication skills o Adaptability in client implementation environments o Eagerness to learn and apply new technologies for application improvement.

Applications Developer – London Are you passionate about building innovative applications and delivering cutting-edge solutions? We are working with a leading global law firm to recruit an Applications Developer to join their dynamic technology team in London. This is an exciting opportunity to work on high-performance web, mobile, and client-server applications, as well as maintain and enhance existing systems. The role also involves managing and developing SharePoint environments (on-premise and cloud), ensuring optimal performance, security, and scalability. Key Responsibilities • Design, develop, and maintain custom ASP.NET MVC web applications and SharePoint solutions., • Implement responsive, user-friendly interfaces using frameworks such as React, Angular, Bootstrap, and jQuery., • Develop and optimize SQL databases to support application needs., • Utilize low-code platforms like PowerApps and Power Automate to streamline workflows., • Create and manage reports using SSRS and Power BI., • Provide technical support, troubleshoot issues, and ensure system reliability., • Collaborate with cross-functional teams to deliver solutions aligned with business goals. What They Are Looking For • Degree in Computer Science, Information Systems, or related field., • Minimum 3 years’ experience in software development, with strong skills in SharePoint, SQL Server, and the .NET environment., • Proficiency in C#, ASP.NET MVC/Core, and web API development., • Experience with front-end frameworks and modern development practices., • Strong problem-solving skills and ability to manage multiple projects., • Excellent communication and collaboration skills. Why Apply? This is a fantastic opportunity to join a prestigious global organization that values innovation and offers a collaborative, forward-thinking environment. You’ll work on impactful projects and have the chance to shape technology solutions for a world-class firm. Due to the high volume of applications, we are not able to respond to all enquiries. If you have not received a response within 72 hours, please assume you have not been shortlisted at this stage, however thank you for taking the time to apply. Ryder Reid Legal is a recruitment specialist. For over thirty years we've been connecting legal talent with many of the leading law firms in London and internationally. Follow our LinkedIn page for the latest vacancies.

JavaScript Developer, Contractor, Full-stack | NodeJS, TypeScript, React, AWS | Disruptive Start-up, B2C | Rate c/ £500/day (Outside) | 6-months | UK remote or London Hybrid Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility and work in a small team with proven founders and engineers - on a disruptive and data-heavy B2C application. You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineering | NodeJS, TypeScript, AWS | Disruptive Start-up, B2C | Rate £500/day (Outside) | 6-months | London, Hybrid • Develop, maintain, and optimize robust backend services and APIs that power our mobile and web platforms, • Design and implement low-latency event processing pipelines, • Ensure backend infrastructure is reliable, scalable, and secure, • Enhance database efficiency and refine data storage strategies, • Maintain comprehensive multi-layered test coverage, • Collaborate closely with frontend and mobile teams to define and deliver API contracts, • Set up and manage effective monitoring, logging, and alerting systems, • Influence architectural decisions and help establish engineering best practices, • Conduct code reviews and provide mentorship to junior developers, • Explore and integrate new technologies to expand platform capabilities, • Work with product and design teams to convert requirements into scalable technical solutions, • Continuously refine development workflows and improve system performance What You’ll Need as a JavaScript Developer, Contractor, Backend Engineering | NodeJS, TypeScript, AWS | Disruptive Start-up, B2C | Rate £500/day (Outside) | 6-months | London, Hybrid • 6+ years commercial experience in Backend technologies, with majority focused on NodeJS., • Proven track record of start-up experience, working for cool innovative consumer b2c brands where you've taken ownership., • Confidence working on huge datasets and complex API work, • Great communication skills and attitude to get your hands dirty across the stack and business challenges., • Nice to have: Full stack experience, with TypeScript JavaScript Developer, Contractor, Backend Engineering | NodeJS, TypeScript, AWS | Disruptive Start-up, B2C | Rate £500/day (Outside) | 6-months | London, Hybrid • Location: Remote, • Type: Contract, full-time, • Rate: circa £500/day, • Start: ASAP

Applications Developer We are on the lookout for a versatile, forward-thinking Applications Developer who excels in developing high-performance web, mobile, and client-server applications, and who takes a proactive approach to technology trends in the legal industry to meet evolving business needs. • Salary to £80,000, • Hybrid working (4 days in the office / 1 day WFH), • 09:30-17:30 (Monday-Friday), • £100 monthly employee contribution that can be used for lunch or other expenses, • Free lunch every Wednesday, • Discretionary bonuses, and more! Key Responsibilities of the Applications Developer: • Design, develop, and maintain custom web applications and SharePoint solutions., • Implement responsive and user-friendly front-ends using client-side frameworks., • Develop and optimize SQL databases to support application needs, ensuring performance, integrity, and scalability., • Use low-code development platforms such as PowerApps, Power Automate, PatternBuilder, and Fliplet to design and implement custom applications that improve business processes and workflow efficiency., • Lead project development efforts and ensuring best practices in software development are followed., • Provide high-level technical support and training to users., • Identify, troubleshoot, and resolve issues related to the managed platforms. Skills & Requirements of the Applications Developer: • 3+ years’ experience in software development with a strong focus on SharePoint, SQL Server, and the .NET environment within a law firm., • Bachelor’s degree in Computer Science, Information Systems, or a related field is highly advantageous., • Proficiency in administration and development of SharePoint., • Strong knowledge of programming language with expertise in web development., • Experience with client-side and front-end frameworks such as jQuery, Bootstrap, React, and Angular.

Job Title: Full Stack Software Developer REMOTE Salary Range £50,000-£60,000 You must be based in the UK for this role! ABOUT THE COMPANY We are an established IT organisation providing a comprehensive, fully integrated suite of web-based “Software as a Service” (SaaS) solutions to Property Management companies and Managing Agents. The business is growing its market presence and expanding the breadth of services and functionality offered. Due to this continued growth, we are now looking to bring additional developers into the team. We aim to attract and retain diverse, engaged, passionate, and pragmatic individuals who thrive on solving challenges, achieving success, and having fun while doing so. THE ROLE We are seeking a Full Stack Software Developer who will work closely across the organisation to support and further develop our core software platform. You will play a key role in maintaining and enhancing the existing web system, leveraging your technical expertise, coding ability, and practical understanding of business needs to support the company’s growth plans. This is a role where you will have direct impact and visibility. As you take on more responsibility and contribute to the organisation’s success, you will share in that success. This position is primarily remote / home-based. WHAT YOU WILL BE DOING • Collaborating with Product Managers and the CTO to develop applications aligned with business strategy, • Undertaking technical design, coding, unit testing, system testing, and solution deployment, including SQL/database and application design, • Providing technical consulting expertise when needed, • Assisting the Support team by offering technical backup where required, • Experience coding, testing, and implementing highly available, scalable, secure, multi-tenant SaaS applications, • Enjoy working as part of a smaller team where your work has a direct impact, • Ability to create technical specifications, blueprints, or solutions-oriented project proposals (advantageous), • Working knowledge of financial accounting software or experience in the property industry (beneficial but not required), • Able to identify and mitigate risks and issues, • Strong interpersonal, written communication, and presentation skills, • Backend: PHP (CodeIgniter 3 / Slim 4), MySQL, • Frontend: React.js, JavaScript/TypeScript, HTML, CSS, • Tooling: GitLab, Docker, CI/CD Pipelines, • Infrastructure (desirable): Terraform, Ansible, or other Infrastructure-as-Code tools, • Develop and maintain full stack features, • Write clean, maintainable, well-documented code, • Collaborate with product managers and other developers, • Contribute to improvements across DevOps, CI/CD, and containerised workflows, • Assist with mobile app development as cross-platform capabilities expand, • Experience with PHP, particularly CodeIgniter and Slim, • Strong skills in React.js and JavaScript/TypeScript, • Solid understanding of MySQL and database optimisation, • Competence in HTML and CSS for responsive UI, • Familiarity with GitLab and Docker, • Experience integrating AI into existing applications, • Experience with React Native or similar mobile frameworks, • Previous experience working on SaaS or B2B platforms, • Understanding of Agile development workflows, • Familiarity with cloud platforms such as AWS or GCP

Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. We have been meeting customers wherever they are in the digital lifecycle and helping them outperform their competition through speed and innovation. Apexon brings together distinct core competencies – in AI, analytics, app development, cloud, commerce, CX, data, DevOps, IoT, mobile, quality engineering and UX, and our deep expertise in BFSI, healthcare, and life sciences – to help businesses capitalize on the unlimited opportunities digital offers. Our reputation is built on a comprehensive suite of engineering services, a dedication to solving clients’ toughest technology problems, and a commitment to continuous improvement. Backed by Goldman Sachs Asset Management and Everstone Capital, Apexon now has a global presence of 15 offices (and 10 delivery centers) across four continents. About the job The ideal candidate is a self-motivated, multi-tasker, and demonstrated team player. You will be a hands-on developer responsible for the development of new software products and enhancements to existing products. You should excel in working with large-scale applications and frameworks and have outstanding communication and leadership skills. You’ll Work on: • You will develop financial products with direct impact on millions of consumers, • Systems under your watch will be the primary sources of revenue for the organization., • You build it: engineers are in control of decisions about systems they own from the first line of code written, • You run it: engineers with assistance from global SRE guild are responsible for operation of systems they built, • You own it: engineers do not wait for orders here. They do research, pitch projects. Great ideas are valued and implemented, • Professional network: you will meet and collaborate with very influential people within the global organization and the entire industry. Key Responsibilities: Back-End Development: • Design, develop, and maintain RESTful APIs and microservices using Java , Spring Boot etc., • Implement business logic, database interactions, and integrations with third-party services., • Optimize application performance and ensure scalability. Front-End Development: • Develop responsive and user-friendly interfaces using modern front-end frameworks (e.g., Angular, React, or Vue.js)., • Collaborate with UI/UX designers to implement designs and ensure a seamless user experience., • Ensure cross-browser compatibility and mobile responsiveness. Database Management: • Design and manage relational databases (e.g., MySQL, PostgreSQL) and/or NoSQL databases (e.g., MongoDB)., • Write efficient queries and optimize database performance. DevOps and Deployment: • Collaborate with DevOps to deploy applications in cloud environments Testing and Debugging: • Write unit, integration, and end-to-end tests to ensure code quality., • Debug and resolve application issues in a timely manner. Preferred Qualification: • Between 1-5 years experience, • B.S. or higher in Computer Science or related field (or equivalent work experience), • Expertise in Java, React JS, HTML5, • Experience integrating with Restful web services, • Ability to establish trusted partnerships with product heads, and executive level stakeholders, • Comfortable with Agile Operating Models, • Experience with microservice based architecture, • Experience with Kafka, MongoDB, Spring, vert.X Familiar with one or more of the following: • Distributed systems, • NoSQL and relational databases, • Distributed messaging, • Transactional services Our Commitment to Diversity & Inclusion: Did you know that Apexon has been Certified™ by Great Place To Work®, the global authority on workplace culture, in each of the three regions in which it operates: USA (for the fourth time in 2023), India (seven consecutive certifications as of 2023), and the UK. Apexon is committed to being an equal opportunity employer and promoting diversity in the workplace. We take affirmative action to ensure equal employment opportunity for all qualified individuals. Apexon strictly prohibits discrimination and harassment of any kind and provides equal employment opportunities to employees and applicants without regard to gender, race, color, ethnicity or national origin, age, disability, religion, sexual orientation, gender identity or expression, veteran status, or any other applicable characteristics protected by law. Our Perks and Benefits: Our benefits and rewards program has been thoughtfully designed to recognize your skills and contributions, elevate your learning/upskilling experience and provide care and support for you and your loved ones. As an Apexer, you get continuous skill-based development, opportunities for career advancement, and access to comprehensive health and well-being benefits and assistance. We also offer: • An employer pension scheme, • 25 days holiday + Statutory bank holidays, with the option to carry forward or 'cash-in' 5 days each year, • Access to YuLife wellness platform, subscription to Meditopia App, premium subscription to Fiit, life coaching & emotional wellbeing sessions, 24 / 7 virtual GP Access, Employee Assistance Programme, • Life Insurance & Income protection, • Enhanced Maternity Pay & Paternity Pay, • Cycle to work scheme., • Travel loan scheme, • A Tech Scheme which lets you choose from over 5000 tech products at up to a 12% discount., • Free unlimited Udemy account for every employee to support their continuous learning and improvement., • Support in obtaining relevant certifications.

JavaScript Developer, Contractor, Full-stack | NodeJS, TypeScript, React, AWS | Disruptive Start-up, B2C | Rate c/ £500/day (Outside) | 6-months | UK remote or London Hybrid Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot of responsibility and work in a small team with proven founders and engineers - on a disruptive and data-heavy B2C application. You’ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineering | NodeJS, TypeScript, AWS | Disruptive Start-up, B2C | Rate £500/day (Outside) | 6-months | London, Hybrid • Develop, maintain, and optimize robust backend services and APIs that power our mobile and web platforms, • Design and implement low-latency event processing pipelines, • Ensure backend infrastructure is reliable, scalable, and secure, • Enhance database efficiency and refine data storage strategies, • Maintain comprehensive multi-layered test coverage, • Collaborate closely with frontend and mobile teams to define and deliver API contracts, • Set up and manage effective monitoring, logging, and alerting systems, • Influence architectural decisions and help establish engineering best practices, • Conduct code reviews and provide mentorship to junior developers, • Explore and integrate new technologies to expand platform capabilities, • Work with product and design teams to convert requirements into scalable technical solutions, • Continuously refine development workflows and improve system performance What You’ll Need as a JavaScript Developer, Contractor, Backend Engineering | NodeJS, TypeScript, AWS | Disruptive Start-up, B2C | Rate £500/day (Outside) | 6-months | London, Hybrid • 6+ years commercial experience in Backend technologies, with majority focused on NodeJS., • Proven track record of start-up experience, working for cool innovative consumer b2c brands where you've taken ownership., • Confidence working on huge datasets and complex API work, • Great communication skills and attitude to get your hands dirty across the stack and business challenges., • Nice to have: Full stack experience, with TypeScript JavaScript Developer, Contractor, Backend Engineering | NodeJS, TypeScript, AWS | Disruptive Start-up, B2C | Rate £500/day (Outside) | 6-months | London, Hybrid • Location: Remote, • Type: Contract, full-time, • Rate: circa £500/day, • Start: ASAP

Job Title: Full-Stack Developer (Sustainability & Decarbonisation Software) Salary: Competitive + benefits (DOE) Location: Fully remote (UK) You’re a developer who wants your code to mean something. Not just another feature factory - but software that helps real organisations cut carbon, make smarter energy decisions, and build a more sustainable future. This is a fully remote Full-Stack Developer role in an Asset Sustainability team building a mature, mission-led platform used to manage and optimise physical assets (think buildings, equipment, distributed energy, and operational data). The product supports long-term capital planning, energy monitoring, and decarbonisation roadmaps - helping users prioritise the changes that will genuinely move the needle. No sustainability or energy industry experience is required. If you’re strong in Python 3+, PHP 8+, and MySQL 8+ and you care about sustainability, you’ll feel at home here. What you’ll be doing • Building and maintaining features across front end and back end (web + mobile-deployed web apps), • Refactoring and modernising an established application while adding new modules and functionality, • Designing database structures and improving performance, quality, and responsiveness, • Collaborating with stakeholders, ops/support, and other devs to deliver scalable, enterprise-ready solutions, • Reviewing code, sharing feedback, and spotting improvements with a positive, pragmatic mindset, • Troubleshooting bugs and strengthening security, accessibility, and maintainability What you’ll bring • 5+ years’ commercial web/software development experience (degree optional if your track record is strong), • Extensive hands-on use of PHP 8+, Python 3+, MySQL 8+ (PostgreSQL also welcome), • Solid fundamentals in HTML, CSS, JavaScript and experience with Angular 18+, • Comfort deploying and managing Unix-based servers, plus CI/CD and Git workflows, • A clear communicator who can work independently in a remote team - and talk through decisions confidently If you want a remote full-stack developer role where your work supports decarbonisation and sustainability every day, this is it. Apply now or contact Lindsay Warren directly on 07852509003 or at

An innovative renewable energy startup in London is seeking a Mobile Application Developer to design, build, and maintain mobile applications for iOS and Android.The ideal candidate will have over 3 years of experience, proficiency in Swift and Kotlin, and a strong grasp of UI/UX principles.This rol

Mobile Developer – React Native | EdTech Startup.