Explore React Senior React/React Native Developer
Posted 2 days ago
Job Viewed
Job Description
We’re hiring a Senior React/React Native Developer to own key parts of our web and mobile experience. You’ll ship high-quality, scalable features across React (web) and React Native (iOS/Android), mentor teammates, and champion robust engineering practices (TypeScript, testing, CI/CD, design patterns). If you love clean abstractions, smooth UX, and measurable performance, you’ll feel at home here.
6 Month Contract outside IR35
● Design, build, and maintain production-grade React and React Native applications.
● Write clean, type-safe TypeScript with strong attention to DX, reusability, and documentation.
● Apply and advocate sound architecture (SOLID, DRY, KISS, Clean Architecture).
● Lead and participate in code reviews; raise code quality through constructive feedback.
● Collaborate with design, product, and backend to deliver value end-to-end.
● Own performance: instrument, profile, and optimize rendering, bundle size, and startup times.
● Improve developer workflows (linting, formatting, CI jobs, test coverage).
● Mentor engineers through pairing, design docs, and architecture reviews.
● 6+ years professional React experience and 2+ years hands-on React Native.
● Strong TypeScript fundamentals and experience building type-safe APIs/components.
● Modern React mastery: hooks, context, suspense-ready patterns, composition over inheritance.
● State management with Jotai/Zustand/Context API (or Redux/MobX with rationale).
● Solid Git hygiene: branching strategies, PR etiquette, review workflows.
● Responsive, mobile-first mindset and accessibility best practices.
● Pragmatic understanding of design patterns and when not to use them.
Nice to have
● Experience with cloud platforms (AWS/Azure/GCP ) and app distribution (TestFlight/Play Console).
● Tooling: Vite , Turborepo (or Nx), shadcn/ui .
● Observability/monitoring: Sentry , Datadog , New Relic .
● Familiarity with native bridges, push notifications, deep links, OTA updates (Expo/CodePush).
● Performance profiling (Flipper, React Profiler) and offline-first patterns.
How we work● Agile: small squads, weekly releases, CI/CD.
● Quality: unit/integration tests where it matters, design docs for non-trivial work.
● Ownership: you ship, measure, learn, and iterate.
React Native Developer
Posted 14 days ago
Job Viewed
Job Description
React Native Developer (up to £55,000)
Immediate is home to some of the biggest and most loved consumer brands in the UK, including Radio Times, Good Food and BBC Gardeners World magazine. Our trusted, quality content reaches millions of people a month across digital, print, video, podcasts, apps and live events.
We’re the destination for people looking to get more from the things they love. We’re here to inspire, fuel, encourage and educate.
Whether it’s the big things, or the little things; from reaching fitness goals to savouring good food, cultivating outdoor spaces, or enjoying the latest TV sensation – we help bring our audiences joy!
About the role
We are looking for a skilled and passionate React Native Developer to join our app development team. You’ll help shape the future of Fabric, our digital publishing platform that powers some of the UK’s most iconic brands including and serves over 60 million unique users monthly. Our native apps are a rapidly growing part of this platform with hundreds of thousands of active subscribers.
As part of our cross-functional development team, you'll contribute to a shared codebase powering multiple apps, working with modern tooling and infrastructure including TypeScript, React Native, REST APIs, automated tests, and Bitrise for CI/CD.
You’ll report to the Lead React Native Developer and play a key role in building new features, supporting new brand rollouts, and maintaining app quality — always with a focus on user experience, performance, accessibility, and engineering best practices.
As a React Native Developer, you will;
- Immerse yourself in our technical ecosystem
- Develop and test new user-facing features, and support existing ones, across our iOS and Android apps
- Build reusable code, components and libraries for future use
- Optimise screens, code and assets for maximum speed and scalability
- Follow our standards, best practices and guidelines, and be actively involved in improving them
- Use testing frameworks to ensure automated test coverage for platform functionality
- Collaborate with other team members and the Product Manager to progress our digital strategy
- Keep up to date with industry and technical developments
- Write and improve technical documentation when necessary
- Work across disciplines to deliver a great user experience for our customers
Requirements
- JavaScript / TypeScript
- React Native
- Integrating first and third-party services including REST APIs and analytics
- Automated testing including unit and end-to-end
- Understanding of the key differences between native platforms
- Git and NPM/Yarn to manage your work and dependencies
- Great communication skills with colleagues and stakeholders
Desirable
- In-App Purchases and subscriptions via the stores
- Agile working principles
- Working with a design system/component library
- Using JavaScript and React in the browser
- Hands on experience working with native modules on iOS and/or Android
- Bitrise
Benefits
- A relaxed working environment with regular socials including a summer festival
- Immediate Community webinars, well-being initiatives and Mental Health First aiders
- 25 days holiday plus a day for your birthday. Our offices will be closed between Christmas and New Year’s which are in addition to your annual entitlement
- Claim back everyday health care cost with Medicash our Health Cash back plan
- Lease an Electric vehicle through our EV salary sacrifice scheme
- Tailored training and development through our Love Learning platform
- A progressive and transparent culture with clear career progression
- Flexible / hybrid working plus early finish Fridays
- Cycle to work scheme
- Enhanced Family Policies including paternity, adoption and surrogacy leave. We also provide a pregnancy loss, fertility, and carers policy
- Competitive pension plans and Life Assurance
- A newly renovated modern office with lots of collaborative spaces
At Immediate, we pride ourselves on our open, collaborative, and dynamic culture that empowers our people to thrive and give their best. We care deeply about our people, environment, and impact. Our active Diversity & Inclusion network, comprehensive well-being programs, and clear sustainability strategies reflect this commitment.
People are at the heart of our business and creating a diverse and inclusive working environment is extremely important to us. Immediate is an equal opportunities employer. We’ll never treat anyone less favourably because of their sex, gender reassignment, pregnancy and maternity, marital/civil partnerships, sexual orientation, race, nationality, ethnic origin, age, religion or belief or disability. We’re also committed to supporting applications from those who are returning to work following a career break, maternity leave or caring responsibilities.
Immediate is a place where you can grow, be supported, and make a difference
React Native Engineer
Posted 2 days ago
Job Viewed
Job Description
React Native Engineer (New York)
On-site
My client is a team of elite builders, moving fast and redefining what's possible. They're a high-growth software development company and behind the largest crypto social network globally. They build for the future.
As a React Native engineer you will play a crucial role in shaping the future of this exciting venture.
Required Skills:
- MUST have strong React Native experience.
- MUST have shipped multiple apps into production with React Native.
- Swift/Kotlin/Flutter/Objective-C experience is a plus
- Experience working within the crypto industry is a plus.
- Experience working at a fast-moving impressive crypto company or FAANG level company or scale-up.
If you're ready to be a part of a team that is pushing the boundaries of the space, we want to hear from you.
Compensation & Package
- Salary $250,000-$350,000
- Equity & token allocation
- Enhanced healthcare and pension package
React Native Engineer
Posted 20 days ago
Job Viewed
Job Description
As a Senior Software Engineer, you will :
Join a team of exceptional leaders (CTO, CPO, Chief Scientist) and experts (Platform Engineers, Security Engineers, Cryptographers, Protocol Designers) in a dynamic, collaborative environment and will create and implement functional software solutions. Collaborate with upper management to define software requirements and lead operational and technical projects. Oversee significant sub-departmental projects, relying on your strong organizational and problem-solving abilities. Drive software change and release management processes to enhance the overall SDLC maturity. Ensure that software deliverables meet quality standards, adhere to timelines, and prioritize security.Create, test, and maintain top-notch software that aligns with customer requirements and business objectives.DAILY TASKS:
To contribute to Agile Scrum, and ensure deadlines and production quality.To spearhead creative solutions for API and backend related challenges.To manage platform infrastructure for scalability, high availability, and security.To ensure product scalability, high availability, and top-notch code quality.To analyze performance, identifying bottlenecks, and scaling backend systems.To resolve complex issues by identifying root causes and implementing solutions.To implement robust logging, monitoring and alerting to maintain high availability.To build, operate, and secure the APIs, backend, and even cloud infrastructure.To incorporate security best practices into the API design and implementation.To evaluate product code against specifications and gathering requirements.To address problems and document all reported issues and actions taken.To enhance customer satisfaction through technical support.To create and update internal and external documentation.To collaborate with cross-functional teams to improve software development practices.To stay updated on emerging technologies and suggest improvements.To participate in client meetings to assess the solution compared to market alternatives. ProfilRequired Skills: - Strong React Native experience (mandatory).- Must have shipped multiple apps into production with react native (mandatory).- Swift/Kotlin/Flutter/Objective-c experience is a plus.- Experience working within the Crypto industry is a plus.- Experience working at a fast moving impressive crypto company or scale-up.Informations contractuellesContract : Permanent role (Hybrid remote) in London (UK) or New York (USA).Remote first company : flexibility to work fully remotely or at an office location of your preference within the European Union. Salary: €250-300K per year on a full-time permanent work contract.Work essentials: MacBook Pro, iPhone, AirPods, screens, headsets, AirPods, and cables are provided on Day 1 .Training and coursework in Crypto, Blockchain, Security, code, Coding languages and other topics are paid for on-demand to encourage personal and professional growth.Events: fully funded attendance at fintech, blockchain, or related conferences.Teams retreats/meetups/seminars/conferences all around the world to get to meet in-person and foster meaningful connections.Benefits: healthcare and life insurance, retirement plan, sponsored transportation, gym, lunch card, home office equipment, and other perks.Recruitment process : Video call with COO/CTO (30mn).Cognitive and personality tests (async).Focus interview with tech and security teams (30mn x 4).Reference calls and background check via Checkr.React JS Developer - London
Posted 1 day ago
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Job Description
Job Title
React JS Developer
Get The Future You Want!
Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world
Role Overview:
We are seeking a skilled and passionate UI Developer with strong front-end development experience to join our team. The ideal candidate will have hands-on expertise in modern UI technologies and frameworks, with a keen eye for detail and a commitment to delivering accessible, high-performance web applications.
Your Role
- Develop and maintain responsive user interfaces using JavaScript, jQuery, HTML5, CSS3, and ReactJS and other UI technologies
- Implement and optimize styles using CSS preprocessors such as SASS or LESS.
- Work with JavaScript frameworks including Node.js to build scalable front-end solutions.
- Integrate APIs and handle asynchronous data using AJAX and JSON.
- Ensure compliance with accessibility standards and best practices.
- Apply Test-Driven Development (TDD) principles and write automated unit tests using mock object frameworks.
- Collaborate with cross-functional teams to ensure seamless integration and deployment.
- Utilize SCM tools like Git and Perforce for version control and collaboration.
- Leverage tools such as SonarQube, Grunt/Gulp, and npm for code quality and build automation.
- Conduct JavaScript unit testing to ensure code reliability and maintainability.
- Optimize network performance and front-end load times for enhanced user experience.
Your Profile
- Strong proficiency in JavaScript, HTML5, CSS3, and ReactJS.
- Experience with CSS preprocessors (e.g., SASS, LESS).
- Solid understanding of Node.js and modern JS frameworks.
- Familiarity with AJAX, JSON, and RESTful APIs.
- Knowledge of accessibility standards (WCAG, ARIA).
- Experience with unit testing frameworks and TDD methodologies.
- Proficiency in Git, Perforce, and build tools like Grunt, Gulp, and npm.
- Understanding of network performance optimization techniques.
About Capgemini
Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world while creating tangible impact for enterprises and society. It is a responsible and diverse group of 350,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market-leading capabilities in AI, cloud, and data, combined with its deep industry expertise and partner ecosystem. The Group reported 2023 global revenues of €22.5 billion.
Senior React Native Developer
Posted today
Job Viewed
Job Description
Senior React Native Developer (up to £80,000)
Immediate is home to some of the biggest and most loved consumer brands in the UK, including Radio Times, Good Food and BBC Gardeners World magazine. Our trusted, quality content reaches millions of people a month across digital, print, video, podcasts, apps and live events.
We’re the destination for people looking to get more from the things they love. We’re here to inspire, fuel, encourage and educate
Whether it’s the big things, or the little things; from reaching fitness goals to savouring good food, cultivating outdoor spaces, or enjoying the latest TV sensation – we help bring our audiences joy!
About the role
We are looking for a skilled and passionate Senior React Native Developer to join our app development team.
You’ll help shape the future of Fabric, our digital publishing platform that powers some of the UK’s most iconic brands including and serves over 60 million unique users monthly. Our native apps are a rapidly growing part of this platform with hundreds of thousands of active subscribers.
As part of our cross-functional development team, you'll contribute to a shared codebase powering multiple apps, working with modern tooling and infrastructure including TypeScript, React Native, REST APIs, automated tests, and Bitrise for CI/CD.
You’ll report to the Lead React Native Developer and play a key role in building new features, supporting new brand rollouts, and maintaining app quality — always with a focus on user experience, performance, accessibility, and engineering best practices.
As a Senior React Native Developer you will;
- Immerse yourself in our technical ecosystem
- Take ownership of new feature development
- Support existing features, across our iOS and Android apps
- Lead by example in building reusable code, components and libraries for future use
- Drive performance optimisations and help define and uphold performance budgets
- Contribute to and improve our coding standards, best practices and guidelines
- Champion testing practices, using the relevant testing frameworks to ensure appropriate automated test coverage for all platform functionality
- Collaborate with team members and the Product Manager to progress our digital strategy
- Keep up to date with industry and technical developments and proactively bring suggestions back to the team
- Write and improve technical documentation when necessary
- Work across disciplines to deliver a great user experience for our customers
Requirements
- JavaScript / TypeScript
- React Native
- Integrating first and third-party services including REST APIs and analytics
- Automated testing including unit and end-to-end
- Understanding of the key differences between native platforms
- Git and NPM/Yarn to manage your work and dependencies
- Great communication skills with colleagues and stakeholders
Desirable
- In-App Purchases and subscriptions via the stores
- Agile working principles
- Working with a design system/component library
- Using JavaScript and React in the browser
- Hands on experience working with native modules on iOS and/or Android
- Experience with Bitrise and GitHub Actions
Benefits
- A relaxed working environment with regular socials including a summer festival
- Supportive well-being initiatives and benefits, talks & workshops, and Mental Health First aiders & Champions
- 25 days holiday plus a day for your birthday. Our offices will be closed between Christmas and New Year’s which are in addition to your annual entitlement
- Tailored training and development through both our inhouse learning platform and LinkedIn Learning
- A progressive and transparent culture focused on your development
- Flexible / hybrid working plus early finish Fridays
- Cycle to work scheme
- Enhanced Family Policies including paternity, adoption and surrogacy leave. We also provide a pregnancy loss, fertility, and carers policy
- Competitive pension plans and Life Assurance
- A newly renovated modern office with lots of collaborative spaces
At Immediate, we pride ourselves on our open, collaborative, and dynamic culture that empowers our people to thrive and give their best. We care deeply about our people, environment, and impact. Our active Diversity & Inclusion network, comprehensive well-being programs, and clear sustainability strategies reflect this commitment.
People are at the heart of our business and creating a diverse and inclusive working environment is extremely important to us. Immediate is an equal opportunities employer. We’ll never treat anyone less favourably because of their sex, gender reassignment, pregnancy and maternity, marital/civil partnerships, sexual orientation, race, nationality, ethnic origin, age, religion or belief or disability. We’re also committed to supporting applications from those who are returning to work following a career break, maternity leave or caring responsibilities.
Immediate is a place where you can grow, be supported, and make a difference
Quantitative Developer - React/C#
Posted 2 days ago
Job Viewed
Job Description
Role: Quantitative Developer – React/C#
Location: London
Industry: Hedge Funds
Travel: Hybrid
Overview:
A leading global quantitative investment manager is seeking a skilled Quantitative Developer (React/C#/Python) to join their London-based team. You will work as a desk-facing developer alongside global cross-asset systematic trading operations in a fast-paced, evolving setting. The position demands strong technical skills, adaptability, and a proactive approach to teamwork and project delivery.
Responsibilities:
- Provide daily technical support and trading insights to multiple activities and asset classes.
- Build, optimize, and maintain reporting and analytical tools for research and trading, leveraging React, C#, and Python frameworks.
- Take ownership of production processes to align with dynamic business objectives.
- Collaborate closely with analysts, quants, and developers, offering constant feedback on investment strategy performance.
- Expand and upgrade software infrastructure to match evolving business needs.
- Adopt a systematic approach to problem-solving, enabling scalable solutions.
- Multitask effectively while working in a team-oriented, collaborative environment.
Experience:
- Minimum 3 years experience as a software engineer.
- Front-end experience with React, MUI, AG-Grid, and ECharts.
- Advanced proficiency in C and Python (required).
- SQL expertise preferred.
- Strong communication, organizational skills, and ability to multitask.
- Ability to work independently and collaboratively with a global team.
- Prior buyside experience is essential.
Compensation:
Salary and benefits are highly competitive. Diversity and work-life balance initiatives are included.
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Senior Frontend Developer - React
Posted 17 days ago
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Job Description
Your core responsibilities will include translating UI/UX design wireframes and mockups into functional, responsive, and scalable code using React and its ecosystem (Redux, Context API, etc.). You will collaborate closely with backend developers and UI/UX designers to ensure seamless integration of frontend and backend logic, and to deliver a cohesive user experience. Writing clean, maintainable, and well-documented code, along with developing and implementing comprehensive unit and integration tests, will be a key part of your role.
You will play a vital role in code reviews, providing constructive feedback to team members, and mentoring junior developers. Staying current with the latest frontend technologies, frameworks, and best practices will be essential, and you will be encouraged to advocate for and explore new tools and techniques that can enhance our development process and product quality. Performance optimization and ensuring cross-browser compatibility will also be critical aspects of your work.
The ideal candidate will possess a deep understanding of modern JavaScript (ES6+), React, and related state management libraries. Proven experience in building complex, single-page applications (SPAs) is required. Excellent problem-solving skills, a keen eye for detail, and a passion for creating exceptional user experiences are paramount. You must be a strong communicator and collaborator, capable of thriving in a fast-paced, agile, and remote development environment. This is an exceptional opportunity for a talented frontend developer to lead and innovate within a forward-thinking, fully remote organization.
**Key Responsibilities:***
- Develop and implement highly responsive and user-friendly frontend interfaces using React.
- Translate UI/UX designs into high-quality, maintainable code.
- Collaborate with backend engineers and designers to integrate frontend components.
- Write comprehensive unit and integration tests to ensure code quality.
- Participate actively in code reviews, providing constructive feedback.
- Optimize frontend performance and ensure cross-browser compatibility.
- Mentor junior frontend developers and share best practices.
- Research and advocate for the adoption of new frontend technologies and tools.
- Troubleshoot and resolve complex frontend issues.
- Contribute to architectural decisions for the frontend stack.
- Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
- Minimum of 5 years of professional experience in frontend development.
- Extensive experience with React, Redux, and modern JavaScript (ES6+).
- Proficiency in HTML5, CSS3, and preprocessors like SASS/LESS.
- Experience with RESTful APIs and asynchronous request handling.
- Familiarity with build tools such as Webpack, Babel, and npm/yarn.
- Experience with testing frameworks (e.g., Jest, React Testing Library).
- Understanding of CI/CD pipelines and version control systems (Git).
- Strong problem-solving and debugging skills.
- Excellent communication and collaboration abilities, with proven success in remote teamwork.
.NET Developer, C#, React
Posted 45 days ago
Job Viewed
Job Description
.NET Developer - Financial Trading - C#, React - London
(Tech stack: .NET Developer, .NET 9, C#, React, Programmer, Full Stack Engineer, Architect, .NET Developer)
Our client, a market-leading financial trading firm, renowned for its innovation, lightning-fast technology and elite engineering culture, is seeking talented .NET Developer to join their award winning team. With a strong presence in global markets, they build cutting-edge trading platforms that process vast volumes of data in real time. Their success is rooted in a deep understanding of finance, a commitment to clean, high-performance code and a relentless focus on staying ahead of the technological curve. This is a rare opportunity to join a company where tech is not a support function, it is the business.
The ideal candidate .NET Developer will have commercial experience working with .NET, C# and React. Prior exposure to trading systems or financial services is highly desirable due to the nature of the role. Our client will provide training in: .NET 9, JavaScript, Angular 19, Microservices, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB.
You will be part of a dynamic and highly skilled engineering team building high-performance, low-latency trading platforms and tools. This is a greenfield project and a chance to leave your mark on a business-critical system from day one.
All .NET Developer positions come with the following benefits:
- Company shares
- 15% pension contribution
- Bupa private healthcare
- 3 hours per week of personal development time
- £4.5k annual training allowance
- 27 days holiday + birthday off
- Flexible hours & remote working
- Pizza & beer Fridays
- On-site yoga classes
Location: London / UK Remote
Salary: £0,000 - 5,000 + Bonus + Pension + Benefits
Applicants must be based in the UK and have the right to work in the UK even though remote working is available.
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Software Engineer (Python/React)
Posted 2 days ago
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Job Description
Software Engineer – AI Startup – Up to 85k