Ruby on Rails Developer at Billetto | London

Join a vibrant and dynamic team where the principle of 'freedom with responsibility' drives our culture. At Billetto, our tech team consists of passionate developers dedicated to leveraging the latest technologies and tools that inspire us. If you have a keen interest in the startup ecosystem and are eager to gain hands-on experience with a rapidly growing startup, you've found the right place.As an iOS Developer, you will play a crucial role in developing our iOS 'members' app, available on the App Store, as well as our specialized app for event organizers.We offer a competitive salary, comprehensive benefits, and an office located in the heart of East London.

Role overview ASOS seeks an iOS Engineer in London to help shape the mobile shopping experience for millions of users. This position centers on building and maintaining iOS applications that make shopping simple and enjoyable. What you will do Collaborate with designers, product managers, and fellow engineers to design and refine mobile features. Develop, test, and maintain iOS applications with a focus on quality and performance. Share ideas and feedback to help ensure the apps meet user expectations and continue to improve. Location This role is based in London.

Greetings! We are Plum, your innovative saving and investing application dedicated to helping you grow your finances for a lifetime. Whether you're saving for your first home or planning for a sun-soaked retirement, Plum is here to support you.Since our inception in 2016, over 2 million users across 10 European markets have saved more than £2 billion through our intelligent automation and advanced AI. This is the magic of Plum! We've also received accolades from prestigious organizations, including Deloitte and Finder, for our outstanding contributions.Our success is thanks to our passionate team of over 200 Plumsters, who work collaboratively across Europe to fulfill our mission. We are now eager to welcome more talented individuals to join us on this exciting journey.The Team and the RoleWe are on the lookout for a customer-centric iOS Engineer to join our engineering team in London. Plum has been recognized multiple times by Apple, having been named App of the Day and holding a stellar rating of 4.6 stars with 53,000 reviews. In this role, you will be instrumental in developing the iOS version of Plum, enhancing the way our current and future users interact with their finances.Our Engineering PhilosophyWe prioritize sound engineering principles, creativity, uniqueness, and a healthy sense of curiosity. Our approach to using external frameworks is deliberate, and we aspire to craft simple, well-tested code that can be delivered rapidly.How We CollaborateOur teams operate in squads. Each squad is mission-driven and includes Product Managers, Designers, Backend and Mobile engineers, all aimed at developing and maintaining products, services, and tools that deliver an unforgettable user experience while addressing any operational needs from Plum's side. Squads are organized into Pillars that align with our distinct strategic business areas, and we place significant trust in data-driven and well-informed squads that take ownership of their work.As an iOS Engineer, you will be part of a Mobile engineering team that shares the same vision and enthusiasm for building an exceptional mobile experience that empowers users to achieve financial well-being.Your ResponsibilitiesDevelop a product that enhances users' financial well-being.Engage with Swift programming and stay updated on the latest iOS technologies.Possess in-depth knowledge of the complete iOS stack.Have experience in deploying and iterating on applications in the App Store.Collaborate closely with designers, transforming their visions into delightful user experiences.Understand the significance and impact of your contributions as a product person.Go above and beyond to add that extra touch of excellence.

Join Engine by Starling, where we are dedicated to partnering with top-tier banks worldwide to fuel their ambitions for rapid business growth through our cutting-edge technology.As a software-as-a-service (SaaS) division of Starling Bank, Engine was established to provide the innovative technology that has powered Starling's remarkable success. Our platform is now available for banks and financial institutions globally, allowing them to leverage advanced digital features and streamlined back-office processes.At Engine, we foster a collaborative environment where every team member contributes to delivering exceptional results for our clients. We are engineering-focused and seek passionate individuals eager to harness Engine’s technology to revolutionize banking across various markets. Our work is driven by five core values: Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.Hybrid Working ModelWe embrace a Hybrid working model at Engine, preferring that team members reside within a commutable distance from our offices to facilitate in-person collaboration.About Engineering at Engine by Starling - https://www.enginebystarling.com/We are actively seeking iOS Engineers to enhance the Engine Platform, ensuring our features cater to banks worldwide while also developing new functionalities that have yet to launch in the UK market.Engine by Starling engineers are enthusiastic about contributing to the rollout of new features, regardless of their primary technology stack. Learn more about our team through the case studies below, including our collaboration with Women In Tech.

About the RoleJoin us at SumUp, where our mission is to connect merchants and consumers, fostering the growth of local communities. With SumUp Pay, we are revolutionizing the banking experience, allowing consumers to effortlessly connect with their favorite small businesses while ensuring merchants enjoy free transactions.SumUp Pay simplifies money management for consumers, providing them with enhanced spending experiences and financial tools that are tailored for today's lifestyle—covering banking, card services, savings, and open banking functionalities.This pivotal engineering role involves taking full ownership of the SumUp Pay iOS application, where you will develop and ensure the quality of features that consumers use daily. You will collaborate closely with Backend Engineers, Product Managers, Designers, and Android Engineers to create polished, reliable, and impactful mobile experiences.

About Us At Konrad Group, we are a pioneering digital consultancy committed to addressing intricate business challenges faced by our global clientele. Our culture thrives on innovation, and we take pride in creating best-in-class digital products that are utilized by millions of consumers worldwide. We seek highly intelligent, analytical, and diligent individuals who are passionate about continuous learning. Role Overview As an iOS Developer, you will engage in the development of iOS applications, collaborating closely with our accomplished software development team. Your role will involve contributing to both consumer and enterprise applications, making it a perfect fit for developers who are confident in their technical skills and eager to be part of a dynamic and continuously evolving team at Konrad. Your Responsibilities Develop maintainable, testable, and high-performance software in conjunction with our exceptional team. Engage in code reviews and conduct thorough testing to guarantee the delivery of top-quality software. Investigate new technologies and tools, sharing insights with the team. Communicate effectively with all team members to facilitate collaboration. Requirements Proven experience in building iOS applications using Swift. Strong understanding of essential programming and computer science concepts. Comprehensive knowledge of the end-to-end mobile application development process, including server-side interactions. Solid grasp of core mobile principles such as UI implementation, common development frameworks, and REST APIs. Familiarity with common architectural patterns like MVVM, MVP, and MVC. Excellent interpersonal skills, as teamwork and communication are key to our success. A proactive mindset with a strong desire to produce outstanding work. A passion for enhancing software development workflows and processes. Preferred Qualifications Familiarity with functional reactive programming and ReactiveX frameworks is advantageous. Experience with Objective-C. Knowledge of modern networking approaches, such as GraphQL. Additional mobile development experience, including Android development with Java or Kotlin, or cross-platform development using React Native, Flutter, Ionic, Xamarin, or Cordova.

About Freetrade Freetrade aims to make investing simple and accessible, helping millions manage and grow their savings. With a focus on affordability and clarity, the team is committed to reshaping how people invest in the UK and beyond. After a recent partnership with IG Group, Freetrade continues to operate independently while benefiting from the backing of an established industry leader. The company is rolling out new features in 2026, including mutual funds, bonds, family investment tools, and exploring AI-driven enhancements to the customer experience. Role Overview: Mid-Level iOS Mobile Engineer This position is based in London and focuses on building and improving the Freetrade iOS app, which gives customers access to investment opportunities across UK, US, and EU markets. The engineering team works on a platform used by thousands every day, tackling technical challenges and delivering solutions that matter. The environment encourages growth, collaboration, and innovation, with opportunities to learn from experienced engineers across both iOS and Android. What You Will Do Develop and implement new features for the Freetrade iOS app. Collaborate closely with design, product, and QA teams to create user experiences that meet customer needs. Respond to customer feedback and queries, helping to maintain high satisfaction. Contribute to prioritizing platform issues, technical debt, and architectural improvements. Support the delivery of a high-quality app and a strong developer experience. What We’re Looking For Solid understanding of the iOS platform and mobile development principles. Strong problem-solving skills and a desire to keep learning. Experience working collaboratively within cross-functional teams. Interest in building products that make a real difference for customers. Why Join Freetrade’s Engineering Team? Work on a scalable, impactful platform used daily by thousands. Be part of a team driving product innovation in the investment space. Grow your skills alongside experienced mobile engineers. Help shape the future of investing for a broad customer base.

Role overview Motorway is looking for a Senior iOS Engineer based in London. The focus of this role is to build and enhance iOS applications that support an easier car selling experience for users. The work involves designing features that encourage engagement and help Motorway deliver its services more efficiently. What you will do Design and develop iOS applications for Motorway’s platform Collaborate with product, design, and engineering teams to deliver dependable software Contribute to shaping new features and improving overall app performance Collaboration This role requires frequent teamwork with colleagues across different departments to ensure the software aligns with both user needs and business objectives.

(Mid/Senior/Staff) iOS Engineer – London Please note that the positions are based in London, United Kingdom — relocation and visa support is provided if required (must currently be based in the United Kingdom or Europe). THE BEST WORK OF YOUR CAREER Trade Republic is the largest savings platform in Europe, operating across 18 countries and serving over 10 million customers who trust us with more than 150 billion Euros in assets. Our ambition is to achieve even more. We are dedicated to empowering individuals to build wealth with simple, secure, and free access to financial systems. Join us and grow your career while working alongside exceptional talent and cutting-edge technology to shape a positive future for millions. WHAT YOU'LL BE DOING Contributing your expertise to the iOS guild to uphold technical excellence. Mentoring fellow engineers while receiving dedicated support for your growth. Taking ownership of product development through collaboration with various roles, ensuring quality and timely delivery. Thriving in a dynamic, goal-driven agile environment. WHAT WE'RE LOOKING FOR A minimum of 5 years of experience in mobile engineering. Proficiency in Swift, programmatic UI, and foundational knowledge of reactive programming. A passion for creating exceptional UX and UI, with a desire to collaborate closely with our design team. A commitment to quality, with an understanding of best practices for both code and product excellence. TECHNOLOGY STACK 100% Swift SwiftUI and UIKit Reactive data flow utilizing Combine, ReactiveSwift, and WebSockets MVVM-C architecture Dependency Injection WHY YOU SHOULD APPLY NOW Our culture champions ownership, excellence, and high energy. We are deeply committed to achieving results and holding each other accountable. We aim to tackle one of the biggest challenges faced by Europeans: closing the pension gap and democratizing wealth. If this inspires you, we encourage you to reach out!

About Freetrade Freetrade aims to make investing accessible and straightforward for everyone. Many people find investing intimidating or costly, and we are working to change that. Our recent partnership with IG Group lets us operate independently, while drawing on the resources of an established industry leader. In 2026, we are accelerating our product development, with plans to launch features like mutual funds, bonds, and family investment tools. We are also exploring ways to use AI to improve our customer experience. Role Overview: Mid-level iOS Engineer We are looking for a Mid-level iOS Mobile Engineer to join our London-based team. The Freetrade iOS app helps users access investment opportunities across the UK, US, and EU markets. As part of our mobile engineering group, you will help build and maintain a platform that thousands rely on daily. What You Will Do Implement new features for the Freetrade iOS app, written entirely in Swift Address user feedback and help resolve queries to improve customer satisfaction Work closely with design, product, and QA teams to deliver engaging user experiences Help prioritize platform issues and manage technical debt Contribute to architectural decisions that support a high-quality application and strong developer experience What We Look For Solid understanding of the iOS platform Strong problem-solving skills Interest in growing technical expertise within a collaborative team Willingness to learn from experienced engineers across iOS and Android Our Tech Stack iOS application built entirely in Swift Location This role is based in London.

About the Role Speechify is hiring an iOS Core Product Software Engineer in London. This role focuses on building and improving our core iOS applications. The work centers on delivering a smooth, engaging experience for users. What You Will Do Develop and enhance key features in Speechify’s iOS apps Work closely with teams across engineering, design, and product Help shape and maintain new functionality from idea through release

Senior iOS Software EngineerAt Deliveroo, we are on a mission to revolutionize the way people shop and dine. Our culture is driven by impact, innovation, and growth, as our engineering teams confront intricate technical challenges in a global, three-sided marketplace, constructing and scaling systems that cater to millions of customers, riders, and partners daily.From real-time logistics to resilient infrastructure and marketplace optimization, we create and maintain the technology that fuels Deliveroo's expansive growth.We are seeking a Senior iOS Software Engineer to enhance our London team. In this position, you will play a vital role in evolving our mobile architecture and delivering high-performance features that shape the future of on-demand delivery. This position allows for a hybrid work setup, typically involving 3 days in the office.Learn more about our Engineering team — discover our motivations, work dynamics, and what you can anticipate.Your ResponsibilitiesAs part of the Consumer team, you will be pivotal in ensuring that millions of users effortlessly transition from

Role overview Spotify is hiring a Senior Mobile iOS Engineer in London. The focus of this position is to build and enhance features for the iOS platform, shaping the listening experience for millions of users around the world. What you will do Design and implement new features for Spotify’s iOS app Collaborate with product, design, and engineering teams to deliver polished mobile applications Influence technical decisions that improve user experience and app performance Requirements Proven experience developing mobile applications for iOS Ability to work effectively with cross-functional teams Drive to create solutions that connect with a global audience Spotify Technology S.A. aims to unlock human creativity through the intersection of technology and music.

About Air Apps Air Apps began as a family-founded company in Lisbon, Portugal, in 2018. The team set out to improve personal and entrepreneurial resource planning with an AI-powered Personal & Entrepreneurial Resource Planner (PRP). Since then, Air Apps has grown to operate in both Lisbon and San Francisco, remaining self-funded and reaching over 100 million downloads worldwide. The company focuses on building tools that help people plan, work, and live better. Every team member contributes to shaping how individuals manage their resources and daily lives. Senior iOS Engineer Role The Senior iOS Engineer will play a key role in developing and maintaining Air Apps’ iOS applications. This work includes ensuring high performance, reliability, and a strong user experience across the app suite. Collaboration is central: expect to work closely with designers, product managers, and other engineers to deliver new features and refine existing ones. Strong skills in Swift and a deep understanding of iOS development best practices are essential for success in this position. The team values innovation and attention to detail to keep their apps competitive in the App Store. Work Location and Relocation This is a fully onsite position based in Lisbon. Relocation assistance is provided for those moving to Lisbon.

Join Canva as a Senior UI Engineer, where you will play a crucial role in designing and developing exceptional user interfaces for our iOS and macOS applications. Collaborate with cross-functional teams to create engaging user experiences that delight our millions of users worldwide.

Talan is looking for a Python Developer to join its London office. This position centers on building and maintaining applications for a variety of client projects. The work includes both new software development and ongoing support, with a strong emphasis on delivering solutions that meet business needs. Key responsibilities Design, develop, and maintain Python-based applications Collaborate with colleagues across different teams to achieve project objectives Take part in planning and implementing technical solutions Support existing systems and address issues as they come up Role overview This role involves hands-on development as well as troubleshooting and supporting live systems. Working in a collaborative environment, the Python Developer will contribute to projects that serve a diverse group of clients.

Join Our Team as a Senior React.js Developer in London!We are seeking a talented and experienced Senior React.js Developer to be part of our innovative team at Difrent, a leading arts provider located in the vibrant hub of London. In this role, you will engage in exciting projects from inception to completion, ensuring they are both technically sound and visually stunning.As a key contributor, you will craft elegant code and collaborate closely with clients on various agile projects, working alongside a multidisciplinary digital team to deliver top-notch products.

Join Moneybox, a leading fintech company in London, as a Web Developer. In this pivotal role, you will collaborate with our development team to build and maintain innovative web applications that enhance user experience and drive engagement. You will have the opportunity to work with cutting-edge technologies and contribute to exciting projects that shape the future of finance.

About Us:At Paddle, we revolutionize the payment infrastructure for digital product companies. As a Merchant of Record, we alleviate the complexities of payment fragmentation, offering a solution that is faster, safer, and more cost-effective. With support from renowned investors such as KKR, FTV Capital, Kindred, Notion, and 83North, we proudly serve over 5,000 software sellers across 245 territories worldwide.The Opportunity:We are in search of a passionate Developer Advocate, focused on content creation, to join our dynamic Developer Experience team. This role places you at the forefront of enhancing our developer-centric tools and content at Paddle.Your mission will be to ensure that the implementation of Paddle is a seamless experience. By refining our API to be both intuitive and robust, you will contribute to building product features that simplify onboarding for our customers. Your expertise will be pivotal in creating exceptional documentation, tutorials, and resources that will empower our users and facilitate the growth of our platform.Key Responsibilities:Generate engaging content that directly connects with both prospective and existing customers, including changelog updates, comprehensive guides, tutorials, and articles.Collaborate with internal teams to identify developmental opportunities and maximize impact.Craft compelling copy in partnership with product owners, marketing, and design teams.Document features, improvements, and bug fixes by gathering and organizing technical insights from engineers and other stakeholders.Lead the creation and refinement of API documentation.Establish technical documentation standards.Solicit feedback from colleagues and customers to ensure that all documentation remains current and relevant.