Backend Engineer - API Development

About xAIAt xAI, our mission is to develop AI systems that accurately comprehend the universe and support humanity’s quest for knowledge. Our dedicated team is small yet highly driven, focused on achieving engineering excellence. We invite individuals who are eager to challenge themselves and thrive on curiosity. Embracing a flat organizational structure, we encourage hands-on contributions towards our mission. Initiative and consistent excellence are rewarded with leadership opportunities. Strong communication skills are essential for sharing knowledge concisely and effectively with team members. About the RoleWe are on the lookout for a talented Android engineer to join our impactful team focused on developing the most valuable AI application in the world, defined by the positive effect it has on users. You will have the opportunity to craft innovative mobile experiences, merging technical expertise with a strong product vision to create outstanding solutions that resonate with users.Your responsibilities will include tackling critical product or technical challenges at any given time.

About xAIAt xAI, we are dedicated to developing cutting-edge AI systems that enhance humanity's understanding of the universe and support our quest for knowledge. Our team is compact yet highly driven, committed to engineering excellence. We seek individuals who relish challenges and thrive on curiosity. Our flat organizational structure empowers all employees to take initiative and contribute meaningfully to our mission. We value strong work ethics and prioritization skills, and we expect our team members to communicate effectively and share knowledge concisely with one another. About the TeamAs a member of our team, you will engage with the full xAI technology stack, encompassing model development to production infrastructure. This role is based in London, UK, and we will align you with a suitable team during the offer stage.About the RoleWe understand that every candidate has a unique journey. Whether you’ve engineered embedded systems for spacecraft or developed large-scale distributed infrastructure, we believe that engineers who excel in one challenging domain can thrive in others. At xAI, our primary focus is on training advanced AI models and delivering products built on them. If you possess a proven track record of remarkable achievements—be it resolving critical issues under tight deadlines or successfully reviving a struggling project—we encourage you to apply, even if your background doesn’t align perfectly with machine learning or software development. The “statement of exceptional work” section in your application is paramount; please take the time to be concise, specific, and concrete.Interview ProcessApplication review.15-minute technical call with the team.Technical interviews.Role alignment discussion.

About the role Motorway is hiring a Senior Android Engineer in London. This position focuses on building and improving mobile applications that support our business and users. The work involves collaborating with designers, product managers, and other engineers to create reliable, user-friendly Android features. What you will do Develop and maintain Android applications for Motorway Work closely with cross-functional teams to deliver new features and improvements Contribute to decisions about architecture, code quality, and user experience Location This role is based in London.

Role overview Three UK is seeking a Regulatory Manager to join the team in London. The position centers on ensuring the company meets all relevant regulatory obligations and helps the business stay aligned with current compliance standards. Key responsibilities Oversee compliance activities throughout the organization Maintain communication with regulatory authorities when required Create and apply policies that support regulatory compliance Promote sound business practices by implementing effective compliance measures Location This role is based in London.

Join Three UK as a Regulatory Lead and play a pivotal role in shaping our regulatory strategies. You will be at the forefront of navigating complex regulatory landscapes, ensuring compliance, and advocating for our interests in the telecommunications sector.

Role overview Xero Limited is seeking a Senior Engineer to join its UK Regional Team, based in London at 7 Devonshire Square. This position focuses on shaping features for the UK market, connecting technical work directly to customer needs and business outcomes. Senior Engineers at Xero handle complex challenges that span multiple products, balancing regional requirements alongside global strategy. Team structure and collaboration The team includes an Engineering Manager, Lead Engineers, and Engineers, all reporting to the General Manager of Engineering for the UK. Collaboration is a core part of the role. Senior Engineers work closely with product owners and peers across Xero, designing, building, and delivering solutions that have real impact. Projects and technical scope Current projects span the full Xero platform, including Payments, Accounting, and Payroll. This role provides exposure to a broad range of products and technical domains within Xero’s suite. Work environment Xero holds a Great Place to Work UK accreditation. Flexible work arrangements are available: choose remote, hybrid, or office-based work in London, Milton Keynes, or Manchester. Offices are designed to support collaboration and connection. Some travel may be needed to coordinate with global teams and support international partnerships. Requirements Curiosity and drive to solve customer problems, delivering clear business value across technical areas Adaptability in learning new domains and navigating unfamiliar codebases Ability to work with stakeholders and build consensus across distributed teams Commitment to high-quality engineering practices, producing scalable and maintainable code Comfort in high-visibility situations, using strong communication to engage stakeholders and broaden influence Experience with modern programming languages and frameworks, along with a solid understanding of software engineering fundamentals

Join xAI as a Software Engineer on our Sandbox Services team, where you'll help develop and maintain a robust, secure, and scalable platform that empowers our AI models with safe access to computational environments. This role involves orchestrating complex workloads and ensuring optimal performance across our infrastructure, enabling models to execute code and interact with tools seamlessly. You'll thrive in a fast-paced, collaborative environment that values technical excellence and innovation.

Join xAI as a Backend Engineer, where you will play a vital role in building robust production systems that support grok.com and our API. We are looking for a highly motivated individual with expertise in scalable infrastructure and a passion for problem-solving. Your experience with Rust or C++, along with your ability to design and maintain distributed systems, will be crucial as you contribute directly to our mission of advancing AI technologies. Strong communication skills and a commitment to excellence are essential in our collaborative environment.

Join Three UK as a Regulatory Manager, where you will play a vital role in shaping our regulatory strategies and ensuring compliance with industry standards. You will collaborate with various stakeholders to develop and implement policies that support our business objectives while adhering to regulatory requirements.

Three UK seeks a Partnerships Executive in London to help develop and maintain key relationships with partners. The position supports the company’s goal of providing reliable connectivity and a positive customer experience. Role overview This role centers on building and nurturing strategic partnerships. The Partnerships Executive will work with internal teams and external organizations to strengthen collaboration and ensure shared objectives are met. Key responsibilities Establish and manage partnerships that align with Three UK’s business goals Maintain ongoing communication with partners to support mutual success Contribute to initiatives that enhance customer connectivity and satisfaction Location This position is based in London.

Role overview The Regulatory Lead at Three UK plays a key part in guiding compliance and shaping company policy to meet telecommunications regulations. Based in London, this position works closely with teams across the business, providing regulatory expertise and ensuring that company practices align with industry requirements. What you will do Advise on regulatory issues that impact the telecommunications sector Collaborate with internal teams to maintain compliance with laws and standards Assist in developing and updating internal policies to match current regulations Support the business in understanding and applying regulatory changes Location This role is based in London.

Business Analyst Reference Number: JR254146Location: Hybrid working model - a blend of home-based and office work at Borough High Street (60/40)Working Pattern: Full Time, 37.5 hours per weekContract Type: PermanentNumber of Roles: 2Grade: IT5ASalary: £51,000 - £54,800 per annumWe are seeking a motivated and skilled Business Analyst to join our dynamic team.Role SummaryIn this role, you will be pivotal in managing customer expectations and demands. You will collaborate closely with various IT functions and business units to assess their needs, ensuring they receive top-notch service and facilitating the prioritization of project deliveries.What You Will Bring to This RoleIf you are passionate about driving change, influencing decisions, and thriving in a fast-paced, collaborative atmosphere, this position is perfect for you.Proven experience in delivering multiple projects within a matrix systems environment.Proficient in organizing and leading workshops, as well as negotiating with diverse stakeholders, up to 10 at a time.Adept at identifying genuine business needs, exploring solution alternatives, and articulating proposals that yield business value. Confident in presenting ideas and recommendations.Experience in developing and maintaining business process maps.Outstanding communication skills – capable of translating technical concepts into business-friendly language, both in written and verbal formats.Results-oriented with a strong focus on managing the delivery timeline of business solutions.A collaborative team player, skilled in working effectively with others.Self-motivated with a strong emphasis on customer and end-user delivery.Knowledge of data governance frameworks and protocols.Familiarity with ITIL processes and standards.About UsKaplan Professional stands as a premier provider of apprenticeships, accountancy, tax, finance, and banking courses, alongside professional assessments. For nearly 80 years, we have played a significant role in shaping the careers of finance professionals.

About FreetradeAt Freetrade, our vision is to simplify investing and make it accessible to everyone. By removing the complexities and high costs associated with investing, we empower millions to maximize their savings.Join us as we transform the investment landscape!We are expanding our team and seeking individuals who are eager to redefine the investment journey for our customers. If you are passionate about solving intricate problems and developing cutting-edge products, you will thrive in our environment.2026 is set to be a transformative year for us. Following our groundbreaking partnership with IG Group, we will continue as an independent entity while benefiting from the backing of a market leader.This year, we are ramping up our product development, introducing exciting features such as mutual funds, bonds, and family investment tools. We are also investigating how AI can enhance customer experiences.If you want to expand your technical expertise, develop new products, and work in a creative and innovative environment, this is the perfect opportunity for you!Why Join Our Engineering Team?Be part of a team that is revolutionizing the investment sector. As a Mobile Engineer, you will play a crucial role in creating and sustaining a scalable platform utilized by thousands daily. We embrace technical challenges, foster innovation, and provide solutions that truly matter. Here, your code will impact investors across the UK. Join us to turn your ideas into reality.The Freetrade Android application offers customers easy access to various investment opportunities in the UK, US, and EU markets.We are seeking a Mobile Engineer (Android) to join our dynamic team at Freetrade.This role requires a solid understanding of the Android platform, strong problem-solving abilities, and a commitment to skill enhancement while collaborating within a team-oriented environment.This is a unique chance to collaborate with experienced mobile engineers across both iOS and Android, enhancing your skills significantly.As part of our mobile engineering team, you will work on implementing new features while ensuring high customer satisfaction by addressing user queries and feedback. Collaborating with design, product, and QA teams, you will create user experiences that delight our customers.

Role OverviewAt Theodo, we are assembling a dynamic team of talented engineers who are passionate about producing exceptional code consistently while enhancing their technical skills. This position is ideal for individuals who excel at tackling complex technical challenges, learning from their exceptional colleagues, and diving deep into the code every day.As part of a high-performing team, you will engage with fast-paced, real-world client projects. This entails thoughtful collaboration, clear communication, and a proactive approach to overcoming obstacles, both for yourself and your teammates.We seek engineers who ask insightful questions, leverage their teammates' knowledge, and understand how to obtain the resources necessary to perform at their best.The Cloud Engineer Role involves building with AWS Serverless technologies. This is a client-facing role where you will participate in discussions and planning with our external clients, engaging in both technical and business-oriented conversations. While our primary stack consists of AWS Serverless and TypeScript, you will have the opportunity to gain experience with diverse methodologies and occasionally explore different technologies.

About xAIAt xAI, our mission is to develop advanced AI systems that can comprehend the universe and assist humanity in its quest for knowledge. Our dedicated team is small, highly motivated, and committed to engineering excellence, making it an ideal environment for individuals who thrive on challenges and curiosity. We foster a flat organizational structure where every employee plays a crucial role in driving our mission forward. We value initiative and excellence, rewarding those who consistently demonstrate strong work ethic and prioritization skills. Effective communication is essential, and all team members are expected to share their insights clearly and concisely.About the TeamYou will join a team responsible for the backend services that power our innovative products, including grok.com and our API. Our focus is on developing and maintaining highly scalable and reliable services capable of efficiently processing tens of thousands of queries per second, hosted across multiple Kubernetes clusters in both on-premises and cloud environments.About the RoleWe are looking for a candidate who meets the following criteria:In-depth expertise in Kubernetes.Proficiency with continuous deployment systems, including Buildkite and ArgoCD.Extensive experience with monitoring tools such as Prometheus, Grafana, and PagerDuty.Strong knowledge of infrastructure as code practices utilizing tools like Pulumi or Terraform.Familiarity with systems programming languages such as Rust, C++, or Go.Experience in traffic management and HTTP proxies, such as nginx and envoy.LocationThis position requires in-person attendance in London, UK. While we typically work from the office five days a week, we do provide flexibility for remote work when necessary. Candidates should be prepared to attend late meetings at least once a week to coordinate with our global teams.

Three UK is looking for a GTM Planning & Governance Specialist based in London. This position plays a key role in shaping go-to-market strategies and upholding governance standards across multiple projects. Collaboration with various teams is central, as the role aims to refine business processes and drive operational improvements. Main responsibilities Assist in planning and carrying out go-to-market activities for different initiatives Work alongside cross-functional teams to make workflows more efficient Help ensure that projects meet governance requirements and follow established best practices Support efforts to boost efficiency throughout operations

Join Three UK as a Senior Counsel specializing in Regulatory Implementation, where you will play a pivotal role in navigating the complexities of telecommunications regulations. Your expertise will ensure compliance and drive strategic initiatives in regulatory matters.

Join Us as a Mid/Senior/Staff Android Engineer in London!Relocation and visa support are available if required, but candidates must currently be located in the United Kingdom or Europe.Bring Your Best Work to LifeAt Trade Republic, we are Europe's leading savings platform, operating across 18 countries and serving over 10 million customers who have entrusted us with more than 150 billion in assets. Our mission is ambitious: to empower everyone to build wealth through easy, safe, and free access to financial systems.As part of our team, you will collaborate with top talents and cutting-edge technology, contributing to a positive and lasting impact for millions of users.Your Role and ResponsibilitiesLeverage your expertise to enhance the Android guild, ensuring technical excellence across the board.Mentor fellow engineers while receiving guidance from a coach to foster your professional growth.Take ownership of product development by collaborating with various roles to ensure quality and timely delivery.Thrive in a dynamic, goal-oriented agile environment.What We SeekA minimum of 5 years of experience in software engineering, preferably within the JVM ecosystem.Proven experience in developing and launching scalable features within a service-oriented architecture.A strong commitment to delivering reliable and maintainable software through iterative development and continuous delivery practices.Experience in building platform services that accelerate product development; prior experience in platform-focused teams is a plus.Our Android Tech StackNative Android application development using Kotlin.Reactive programming frameworks: RxJava2, Kotlin Flow.Architecture patterns: MVVM.Jetpack Compose for UI development.Dependency Injection with Anvil.Why You Should Apply TodayWe cultivate a culture of ownership, excellence, and high energy. We hold ourselves accountable to achieving impactful outcomes, tackling one of the biggest challenges facing Europeans today—closing the pension gap and democratizing wealth. If this resonates with you, we invite you to reach out!

Role overview flohealth seeks a Senior or Lead Android Engineer based in London. The role focuses on developing and enhancing mobile apps that support users in managing their health. This position combines hands-on Android development with technical leadership responsibilities. What you will do Collaborate with designers, product managers, and fellow engineers to deliver new Android features and improvements Design, develop, and maintain Android applications, emphasizing usability and strong performance Influence technical decisions and contribute to the architecture of both new and ongoing projects Mentor junior engineers and share knowledge of best practices within the team Requirements Significant experience building and releasing Android applications Deep knowledge of Android frameworks and design patterns Comfort working collaboratively in cross-functional teams Background in mentoring or leading engineers is considered an advantage