Staff Software Engineer, Full Stack (m/f/d)

About the CompanyAffinidi is a pioneering technology firm committed to revolutionizing data ownership. We empower businesses and individuals to take control of their data, offering a holistic approach to managing their digital identities while ensuring their privacy and security.Our innovative technology facilitates decentralized digital identity solutions, …

Join Anthropic as a Staff Software Engineer on our Inference team, where you will play a pivotal role in building and maintaining the essential systems that power Claude for millions of users globally. This position involves overseeing the complete stack—from intelligent request routing to fleet-wide orchestration across various AI accelerators. You will focus on enhancing compute efficiency to support our rapid user growth while enabling groundbreaking research through high-performance inference infrastructure. As a key player in tackling complex distributed systems challenges, you will help shape the future of AI technology.

About UsSmarkets: Revolutionizing the Betting IndustryAt Smarkets, we operate one of the most advanced prediction markets worldwide, with over £29 billion processed since our inception in 2010. With a community of over 200,000 traders globally, we are redefining betting across various domains, from sports to political markets, ensuring the most competitive prices and fair odds.Our technology stack is meticulously crafted for scalability, reliability, and speed, utilizing Linux, Kafka, Postgres, Kubernetes, along with Python 3, C++17, and React. We build the infrastructure that institutions rely on while making trading accessible to all. Our resilience has allowed us to thrive through every market cycle and industry evolution.Central to our success are our talented team members. We foster a high-performance environment where exceptional skills flourish, combining in-depth business acumen with a commercial outlook to fuel strategic growth.If you are excited about shaping the future of prediction markets with cutting-edge technology and a focus on customer satisfaction, Smarkets is the perfect place for you.Your RoleWe are seeking a highly skilled Staff Engineer to spearhead our engineering initiatives in a senior individual contributor capacity, directly reporting to the VP of Engineering. As the most senior technical individual contributor in the organization, you will be instrumental in guiding our technology stack and fostering innovation across various teams.Key Responsibilities:Serve as a senior technical authority, offering strategic direction and hands-on assistance for impactful projects while advancing the engineering roadmap.Collaborate with the VP of Engineering to optimize our tech stack and enhance development methodologies.Work in tandem with frontend and backend teams to architect scalable and reliable microservices using Rust, Python, and Typescript.Enhance service latency and performance across PostgreSQL, Redis, and Kafka-based systems.Facilitate the deployment of CI/CD, monitoring, and alerting frameworks to maintain system health and performance.Promote engineering best practices and contribute to a culture of collaboration, continuous learning, and innovation.Influence and cultivate a top-tier engineering culture.Identify innovation opportunities to drive business value and sustain a competitive advantage.About You:Proven experience in software engineering, with a solid foundation in computer science principles.Expertise in Rust, Python, and Typescript is highly desirable.Strong problem-solving skills and a passion for innovation.Excellent communication and collaboration abilities.Ability to lead and mentor junior engineers.

About ApturaAptura is at the forefront of building reliable AI systems through expertly crafted evaluation datasets and reinforcement learning environments. Our mission is to create robust training data and verifiable task environments in high-stakes industries such as finance, healthcare, and legal. We are a dynamic, small team based in London, dedicated to making significant contributions and innovating quickly. Each team member plays a pivotal role, and we value initiative and ownership. If you're passionate about shaping the future of AI in real-world applications, we want to hear from you.About the RoleAs a Member of the Technical Staff within our Software Engineering team, you will develop the platform that supports Aptura’s operations and scalability. Your responsibilities will encompass the creation of annotation tools, workflow systems, quality control pipelines, and the internal infrastructure that underpins every dataset and environment we produce.Your daily tasks will include designing expert task creation flows, developing task assignment and review interfaces, constructing data pipelines to convert expert outputs into structured training datasets, and integrating LLM-powered tools directly into our product. Your work will span product engineering and infrastructure, ensuring that the software you develop enables our small team to deliver high-quality evaluation data at scale.You will be instrumental in bringing our platform vision to life, determining what features to build and how to build them, while establishing our development standards as we expand.What You'll DoTake ownership of the core data annotation and workflow platform from task assignment to dataset delivery.Create systems that facilitate expert onboarding, task routing, review workflows, and quality assurance at scale.Enhance AI-integrated pipelines across the platform, including LLM-assisted annotation and automated checks.Collaborate directly with founders and domain experts to transform manual processes into scalable software solutions.Make informed product and engineering decisions in fast-paced, ambiguous environments, prioritizing effectively and shipping products without waiting for perfect specifications.Contribute to defining our team’s approach to development, including tooling, engineering practices, and product strategy.Who We're Looking ForWe seek a proactive individual who excels in ambiguous environments and thrives on the challenge of defining projects without strict specifications. If you enjoy problem-solving and have a strong foundation in software engineering, you will fit well within our team.

9fin is looking for a Staff Engineer to join the team in London. This position centers on building scalable systems and advancing the company’s financial data analytics platform. Staff Engineers at 9fin help set technical direction and have a direct impact on product quality. Role overview This role involves both hands-on engineering and collaboration with peers. The work supports evolving data and user needs, with a focus on reliability and performance. What you will do Design and develop systems that handle increasing data volumes and user demands Collaborate with fellow engineers to strengthen analytics features Offer input that shapes product features and influences the customer experience Location This is an on-site role based in London.

About the PositionWe are seeking a highly skilled and motivated Senior Software Engineer - Generalist to join our innovative team at Anza. This role is pivotal in enhancing our Agave client and the overarching Solana network, focusing on performance, reliability, and security.About UsAnza is a cutting-edge R&D lab focused on the Solana blockchain, dedicated to revolutionizing blockchain performance and scalability. With a team of seasoned executives and core engineers, we tackle the most pressing challenges in the Web3 space. We believe in the power of collaboration and transparency, building robust protocols that can support the crypto ecosystem's growth and security.Your ResponsibilitiesDevelop and optimize our technical infrastructure, particularly the Agave client within the Solana ecosystem.Design and implement testing frameworks to simulate adversarial attacks and proactively identify vulnerabilities.Analyze performance metrics to pinpoint and resolve bottlenecks.Collaborate with subject matter experts to understand and define performance requirements for code components.Benchmark new solutions to enhance system reliability and performance.Work alongside cross-functional teams to architect solutions focused on scalability, security, and optimal performance.Contribute to all stages of the software development lifecycle, ensuring seamless transitions through development, staging, and production.Document architecture and processes to promote standardization and knowledge sharing across teams.

Join a Revolutionary CompanyAt Palantir, we are redefining the landscape of software designed for data-driven decision-making and operational efficiency. Our innovative platforms enable partners to make significant advancements—from developing life-saving pharmaceutical solutions to predicting supply chain challenges and reuniting families with missing children.Position OverviewThe Substrate team at Palantir is at the forefront of our core production infrastructure, managing hundreds of Kubernetes (K8s) clusters across diverse environments including on-premises setups and leading cloud services. As a Senior Software Engineer within Substrate, you will spearhead the design and development of our managed Kubernetes offerings, ensuring they operate seamlessly across all scenarios.In this role, you and your team will lead the deployment and management of our K8s clusters, achieving complete automation with zero manual intervention through the creation of cutting-edge tooling and contributions to core Cloud Native Computing Foundation (CNCF) components. You will play a vital role in maintaining scalability, stability, and security across a varied landscape of compliance standards and hosting infrastructures. Our team culture is anchored in engineering excellence and operational rigor, prioritizing proactive issue resolution and significant investments in automation and self-healing technologies.If you are passionate about large-scale infrastructure and Kubernetes, this opportunity is tailored for you.

Join Us in Empowering UK Small Businesses At Funding Circle, we recognize that small businesses are the backbone of the economy, and our mission is to support their success. Our innovative platform leverages advanced data analytics to provide businesses with the funding they need in mere minutes, not weeks.We embody the dynamic spirit of a fintech startup while benefiting from the stability of a public company. This unique blend empowers our team members, known as Circlers, to take meaningful ownership of their work and drive impactful change.Our high-performing team is dedicated to uplifting one another. We challenge, support, and stand by each other because we understand that together, we can achieve more and build better solutions.Make a Real Impact: In the past year, the businesses on our platform have generated £7.2 billion for the UK economy Join us on a mission that truly matters![Explore our Impact Report] | [Check our Trustpilot Reviews]About the Role London (Hybrid) | 2 days in the office weekly | Competitive Salary + BenefitsWe are seeking a seasoned Staff Engineer with a proven record of technical leadership to join our Product Engineering team.This pivotal role within our Short Term Credit Engineering Group involves leading the development of our advanced platform that enables customers to apply for and manage their credit products. As one of the senior leaders within our Technology division, Staff Engineers are critical in setting high standards and facilitating remarkable achievements.Work closely with product leadership to grasp business objectives and steer the technical direction accordingly, translating these into a comprehensive system and data architecture with defined milestones.Exhibit strong technical documentation capabilities, crafting clear and detailed technical designs and standards.Maintain high standards, promote continuous improvement, and inspire others to reach new heights.Proactively identify and adopt the latest Generative AI tools and techniques to foster innovation and revolutionize our engineering processes, driving the organization towards becoming fully "AI Native.".

Join our innovative team at AECOM as a Senior Software Engineer, where you will play a critical role in designing and developing cutting-edge software solutions. You will collaborate with cross-functional teams to bring complex projects to fruition, ensuring high quality and performance standards are met.

About the Role Shawbrook Bank is looking for a Senior Software Engineer in London. This role focuses on building software that supports business growth and improves efficiency. Collaboration with other engineers and teams is central to the work. What You Will Do Develop and maintain high-quality software tailored to customer needs Work closely with colleagues to deliver solutions that support the bank’s goals Contribute technical expertise to projects and ongoing improvements

Join Attio as a Staff Product Engineer and be at the forefront of revolutionizing how teams collaborate and manage their relationships. You will play a pivotal role in the design and development of innovative products that enhance user experience and drive engagement.

Join CyberArk Software as a Staff Automation Engineer, where you will play a pivotal role in enhancing our automation frameworks. You will work closely with cross-functional teams to design, implement, and maintain automated testing solutions that ensure the highest quality of our security products. Your expertise will help us streamline our processes, improve system reliability, and reduce time-to-market.

Landytech is dedicated to transforming how investment managers, asset owners, and their advisors access essential asset information. Utilizing Sesame, our cutting-edge investment reporting platform, we empower clients across more than 15 countries to make well-informed investment choices and gain insights more swiftly.As a rapidly growing company, we are thrilled to have secured $12 million in Series B funding as of January 2023. In just four years, we've expanded from two co-founders to a vibrant team of over 100 employees, with offices located in both London and Paris. At Landytech, we embrace diversity as a core strength, bringing together a team from over 15 different countries and speaking 14 languages.Role OverviewWe are in search of a skilled Software Engineer to join our dynamic team. In this role, you will design and maintain services and tools, primarily developed in Python, that process and disseminate financial metrics, thereby significantly enhancing how our clients access and utilize vital financial data.This position offers an exceptional opportunity for engineers with solid foundational skills to further develop their expertise in a finance-centric environment, leveraging modern technologies. We welcome candidates at any experience level—whether you are just starting your career and eager to learn, or a seasoned engineer looking for hands-on technical work within the fintech sector.

Join Multiverse as a Senior Software Engineer specializing in Platform Engineering. In this pivotal role, you will leverage your expertise to design, build, and enhance our platform, ensuring it meets the highest standards of performance and reliability. Collaborate with cross-functional teams to deliver robust solutions that drive the success of our innovative programs.

Join our dynamic team as a Senior Software Engineer at Faculty, where innovation meets technology. In this pivotal role, you will be responsible for designing, developing, and maintaining cutting-edge software solutions that drive our projects forward. We're looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges.Your expertise will guide our team in implementing best practices in software development, ensuring high-quality code and optimal performance. You will work closely with cross-functional teams to deliver impactful products that enhance our customers’ experiences.

Role overview Entain seeks a Senior Software Engineer based in London. The position centers on designing, building, and refining high-performance applications that drive key business objectives. Collaboration is a core part of this role, with regular interaction across multiple disciplines to deliver dependable software solutions. What you will do Develop and improve software applications, focusing on performance and scalability Work with cross-functional teams to bring features from initial idea through to deployment Offer technical insight that helps guide Entain’s technology strategy

Join our talented team to create the leading training platform for runners!At Runna, we empower everyday runners to excel by developing an exceptional app that offers world-class training, coaching, and a vibrant community for everyone—from improving 5k times to training for marathons.Our growth is remarkable! In November 2023, we secured a $6.5M funding round led by JamJar, with contributions from Eka Ventures, Venrex, and Creator Ventures. In 2024, we were honored to be one of three global finalists for the iPhone App of the Year by Apple, showcasing our innovation and impact. By 2025, we became part of Strava, further accelerating our journey!Our vision is ambitious: to be the premier global training platform for millions of runners worldwide. As we grow with intention, we seek individuals eager to contribute to something meaningful that leaves a lasting legacy. With the backing of Strava, now is an exciting time to be a part of our journey. The Team You'll JoinWe are in search of innovative, creative, and positive collaborators to become part of our skilled cross-functional engineering team. You will be part of the Train Team, collaborating closely with our modeling teams to integrate essential features aligned with Runna's mission, such as adapting plans for holidays and B races, supporting cutting-edge training plans, and enhancing in-app experiences using our AI/ML tools.You will partner with our CTO and engineering leadership to help shape the future of Runna, receiving unwavering support throughout this thrilling journey. Our roadmap is packed with opportunities to champion new technologies, tackle significant challenges affecting millions of runners, and enhance our existing architecture to elevate our engineering team.Your ResponsibilitiesDesigning, developing, testing, and delivering innovative features across the full stack.Collaborating with the Product team to determine the best solutions for optimal customer experiences.Working with modeling/AI engineers to design the architecture that interfaces between the Runna training engine and the Runna app.Providing technical support to team members as needed.Mentoring and coaching engineers in your team, offering guidance and code reviews while avoiding bottlenecks.

At Vanta, we are driven by our mission to empower businesses to earn and demonstrate trust. We firmly believe that security should be a continuous journey, not a destination. Our platform enables companies to enhance their security practices effortlessly, ensuring a seamless verification process. Join our diverse and talented team, where many have thrived without prior security experience.As a Staff Software Engineer, you will spearhead pivotal technical initiatives that deliver substantial value to our customers and organization. In this influential role within our expanding Privacy & Data Security team, based in London, you'll help strengthen our engineering footprint across Europe. Collaborating closely with product management, design, and a growing engineering team, you will drive the discovery and development of privacy features that enhance Vanta's offerings. Your contributions will expedite product development and ensure a consistent experience for all customer segments.With our rapid growth, it’s crucial to invest in the right abstractions and systems that will enable scalability. As a Staff Software Engineer, you'll identify strategic technical initiatives that resonate across our engineering team, setting a high standard for technical excellence and culture. Your past experiences will be invaluable in propelling Vanta's growth trajectory.Our company has achieved remarkable product-market fit and has been effectively monetizing since the onboarding of our first customer. The pace of our growth presents unique, career-defining opportunities for engineers looking to fast-track their development while contributing to a rapidly scaling organization.This role is remote-first, though we anticipate occasional travel to our London office for team collaboration.We invite you to be a part of our kind and talented team, where your skills can flourish, irrespective of past security experience.Your Responsibilities as a Staff Software Engineer at Vanta:Lead, scope, and execute significant technical projects, laying the foundation for scalable, performant, and adaptable systems.Design, develop, and maintain new product functionalities and infrastructure using modern technologies (TypeScript, React, Node.js).

Role overview Based in London, the Senior Software Engineering Manager for Quality Engineering at Sony Interactive Entertainment Global leads a talented group of engineers. The position centers on defining and executing the strategy for software quality and performance across projects. Main responsibilities Shape the strategic direction for the quality engineering team Mentor and guide engineers, supporting their professional development Establish and maintain effective software testing practices Encourage ongoing improvement within the team Collaborate with cross-functional partners to ensure quality standards are met throughout the software development lifecycle Collaboration and impact This leadership role bridges engineering and quality, making sure software products meet rigorous standards from initial planning through release. Regular interaction with teams across Sony Interactive Entertainment Global helps to maintain and raise quality expectations company-wide.

Role overview The Senior Software Engineer I at Runna will play a key part in shaping how users interact with the company’s products. The work centers on designing, developing, and maintaining applications that support a strong user experience. Expect to take a hands-on approach, working closely with colleagues from different teams to deliver solutions that scale and perform reliably. Location This role is based at the Runna office in London.