System Engineer

Fastly is dedicated to enhancing connections between people and the digital experiences they cherish. Our cutting-edge edge cloud platform empowers customers to swiftly, securely, and reliably deliver exceptional digital experiences by processing, serving, and protecting their applications close to their end-users — right at the edge of the Internet. Designed to leverage the capabilities of the modern internet, our platform is highly programmable and supports agile software development. Trusted by some of the world's leading enterprises, including GitHub, Yelp, Paramount, and JetBlue, Fastly is at the forefront of building a more trustworthy internet. Join us in this mission!Posting Open Date: 20 March, 2026 Anticipated Posting Close Date*: 20 April, 2026*Job posting may close early due to the volume of applicants. Role Overview:As a member of Fastly's Traffic Management Systems Team, you will be responsible for the ownership and operation of services that balance global CDN traffic, alongside Fastly’s Managed DNS product. We are developing an industry-leading DNS solution featuring an autonomous control system that makes real-time, data-driven decisions to maintain high availability and performance across our network. We are looking for a technical leader with a solid background in designing, building, and managing scalable, fault-tolerant distributed systems. This is a critical role within a team that supports vital network services for some of the most popular companies globally, ensuring a seamless and exceptional experience for their users.

Join OpenCoreOS as a Systems Engineer!At OpenCoreOS, we redefine banking technology with our innovative, hyper-performant ledger solutions. Utilizing cutting-edge programming languages like Go and Rust, along with multi-region distributed databases, we empower financial institutions to build on a robust, open foundation instead of a cumbersome monolithic structure.Why Choose Us?Designed for AI: AI isn't just an add-on; it's integrated into our operations, enhancing autonomous workflows and creating intelligent, self-healing systems.Unyielding Reliability: We aim for five-nines reliability to ensure our platform can handle the scale of Tier-1 banks, managing millions of daily transactions without compromising consistency.Industry Expertise: Our leadership team merges strategic insights from seasoned banking professionals with practical experience, ensuring we understand the market dynamics we are transforming.Your Role:Core Financial Systems: Develop mission-critical services ensuring accurate value recording and transfer.Transaction Processing: Create reliable transaction flows that maintain integrity during retries and partial failures.Performance Optimization: Profile and enhance key pathways to ensure predictable latency and scalable throughput.Reliability & Observability: Advance metrics, tracing, logging, and incident readiness for our production systems.AI-Enhanced Development: Utilize and refine AI-driven workflows for improved debugging, operations, and developer efficiency.Core Responsibilities:Manage production systems from start to finish.Enforce safety and correctness through rigorous testing and change management.Troubleshoot distributed and system-level challenges (concurrency, performance, data consistency).

Role overview Recursion Pharmaceuticals is advancing autonomous science by developing AI agents that explore biology and chemistry to speed up drug discovery. The Staff Product Manager for Agentic Systems, based in London, works at the intersection of proprietary data generation and advanced AI models. The main goal: build systems that enable agents to reason, plan, and conduct experiments in automated labs. This role goes beyond managing a product roadmap. It involves setting direction in a fast-evolving field and collaborating closely with engineering leaders. Together, the team identifies which autonomous science capabilities will have the greatest impact on the drug discovery pipeline as AI agent best practices evolve. Success in this position depends on balancing scalable orchestration infrastructure with the need for rapid experimentation, while making informed decisions in a changing environment. What you will do Define architecture for autonomy: Work with engineering leaders to design and build systems that link in silico models (the 'brain') to automated physical labs (the 'body'), supporting closed-loop, autonomous discovery. Lead hypothesis-driven product development: Guide cycles of experimentation to test various agentic frameworks. Decide when to invest in shared, lasting services and when to create quick prototypes to discover effective solutions. Act as a translator: Connect the needs of wet labs and dry labs by turning drug discovery goals into technical requirements for agent reasoning. Focus on optimizing for information gain rather than just volume. Champion human-in-the-loop evolution: Collaborate with scientific stakeholders to define how humans and AI agents work together as the systems develop. Location London, England

About H:At H, we are at the forefront of superintelligence, driven by our mission to harness agentic AI. Our innovative AI agents automate intricate, multi-step tasks traditionally carried out by humans, empowering individuals to reach their fullest potential.We are on the lookout for exceptional AI professionals who prioritize building responsibly and safely while pushing the boundaries of agentic technology. Our culture thrives on openness, continuous learning, and collaborative efforts, where every team member's contribution is valued.About the Team:Our Product Engineering Team plays a pivotal role in the successful deployment and operation of our Agents and Inference platforms, along with related services that support our Research department and lay the groundwork for our market-ready agentic products.Key Responsibilities:Lead the definition and execution of technical architecture, design, and strategic engineering roadmap.Design, develop, and maintain robust, high-performance, scalable systems.Mentor and inspire engineers across various teams, nurturing a culture of technical excellence.Conduct comprehensive code reviews and design evaluations to uphold quality and security standards.Collaborate closely with Research, Engineering, and other stakeholders to deliver impactful solutions.Enhance system reliability, scalability, and observability through continuous improvements.Establish and uphold engineering standards, tools, and processes.Drive innovation and proactively manage technical debt.

Role overview Wise is looking for a Staff Software Engineer to join the Regional Payments Platform team in London. The team builds and enhances payment systems that reach millions of users worldwide. This position centers on developing technology that supports reliable and efficient payment experiences at scale. What you will do Collaborate with colleagues from various disciplines to design and implement scalable payment solutions. Offer technical leadership and insight on complex projects that affect users globally. Influence the architecture and future direction of Wise’s regional payments platform.

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.

Ramboll Group seeks a System Engineer specializing in Project Management & Delivery for its London office. This position helps guide engineering projects from initial planning through to completion, ensuring each project meets client needs and company standards. Key responsibilities Oversee execution of engineering projects, monitoring progress against defined goals Coordinate resources and manage schedules to keep projects moving forward Collaborate with teams to improve workflows and resolve challenges as they arise Support project delivery by tracking quality and confirming expectations are met Location This position is based in London.

Join Arondite as a Deployed Systems Engineer, where you will play a pivotal role in the deployment and management of advanced systems solutions. This position offers an exciting opportunity for technical professionals to showcase their expertise in a dynamic environment.

Join the Vanguard of InnovationAt Palantir, we are at the forefront of developing advanced software for data-driven decision-making and operational excellence. Our platforms empower organizations to harness data for transformative outcomes—be it in developing lifesaving pharmaceuticals, anticipating supply chain disruptions, or locating missing persons.Your ContributionAs a Systems Engineer within Palantir’s Technical Operations team, you will play a pivotal role in optimizing our core business processes and workflows. Your responsibilities will encompass designing, constructing, and sustaining the infrastructure that underpins our vital business functions, including financial reporting, sales operations, and personnel management. Collaborating with both internal teams and external partners, you will adapt industry tools to meet the dynamic needs of Palantir, while enhancing our utilization of Palantir Foundry and AIP for internal projects.In this capacity, you will provide strategic technical guidance to key stakeholders. A typical day may involve assessing new technological solutions, aligning tech initiatives with business objectives, resolving high-priority system challenges, and engaging in cross-functional collaboration to drive system enhancements. Success in this role requires adeptness in managing multiple business systems while demonstrating flexibility and adaptability to evolving requirements and challenges.

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.

Hudson River Trading (HRT) is seeking a talented Senior GPU Systems Engineer to join our dynamic Research and Development team. In this pivotal role, you will play a crucial part in scaling and advancing our sophisticated HPC/AI research infrastructure. Collaborating with a diverse team of experts, you will ensure our trading and research operations run seamlessly 24/7 across the globe. Your responsibilities will include the design and optimization of extensive GPU compute clusters, identifying and resolving performance bottlenecks, and automating system deployment and monitoring across thousands of nodes. This is a high-impact opportunity that requires innovative thinking and technical expertise in a fast-paced environment.

Join Alten as a Senior Systems Engineer and be part of a leading technology consultancy that specializes in engineering and IT services. In this critical role, you will drive innovative solutions and enhance system performance across various projects.

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.

Join System Canada Technologies as a Linux Systems Configuration Engineer, where you'll play a crucial role in optimizing and configuring Linux systems to enhance operational efficiency. Collaborate with a dynamic team to ensure seamless deployment and maintenance of systems that support our innovative technology solutions.

Convergent Research is seeking a Staff Engineer specializing in FPGA Engineering to join the team in London. This position centers on FPGA design and development for technology projects that drive ongoing research and engineering work. Role overview This role contributes to shaping technical solutions that advance the organization's research initiatives. The Staff Engineer will work closely with other engineers and researchers to address complex challenges in FPGA systems. What you will do Design and develop FPGA-based systems for a variety of research-focused projects Use advanced knowledge in FPGA engineering to tackle technical problems Collaborate with cross-functional teams of engineers and researchers Work environment The team emphasizes open communication and values creative approaches to problem solving. Collaboration and a focus on technical progress are central to the group’s work style.

Role overview Antithesis is seeking a Senior or Staff Engineer in London, UK to focus on Hegel. The team values creative problem-solving and technical depth, with engineers regularly exchanging ideas and expertise to drive projects forward. Collaboration is a core part of the work culture. What you will do Tackle complex engineering challenges involving Hegel Support both new and ongoing projects that influence the team’s direction Work closely with colleagues to develop practical solutions Requirements Previous experience at a senior or staff engineering level Keen interest in working with Hegel Enjoys sharing knowledge and collaborating with others Motivated to try new technical approaches Location This role is based in London, UK.

Why Choose Deliveroo?At Deliveroo, we are on a mission to revolutionize the way you shop and dine, delivering your favorite items right to your doorstep. By seamlessly connecting consumers with local restaurants, shops, and riders, we are making access to food and products more enjoyable and convenient than ever before.As a tech-driven company, we are leading the charge in one of the fastest-growing industries globally. Our compact yet impactful team thrives on innovation, rapid execution, and the continuous exploration of exciting ideas.About the RoleWe are seeking a Staff Security Engineer (Level 6) with extensive expertise in Identity and Access Management (IAM). In this crucial role, you will help design, build, and enhance our identity, authentication, and access control frameworks across the organization.This is a hands-on senior engineering position within our Corporate Security Engineering team. You will take on a leadership role in IAM and broader security engineering projects, focusing on designing scalable identity systems, establishing secure access controls, and developing integrations and automation that significantly enhance our risk management strategies.You will leverage your strong security engineering skills along with your in-depth IAM knowledge to influence architectural decisions, mentor fellow engineers, and collaborate with various stakeholders across engineering, IT, compliance, and product teams.Your Responsibilities:Identity & Access ArchitectureLead the evolution of Deliveroo’s IAM architecture, encompassing identity providers like Okta, Azure AD, and Google Cloud Identity, alongside identity governance tools such as ConductorOne and SailPoint IdentityNow.Craft scalable solutions for authentication, authorization, provisioning, deprovisioning, Role-Based Access Control (RBAC), Attribute-Based Access Control (ABAC), Just-In-Time (JIT) access, and privileged access management.Enhance access governance processes, including certifications, Segregation of Duties (SoD) controls, and policy enforcement.Lead technical integrations and implementations across domains, ensuring adherence to core engineering principles.Develop 'Paved Roads' for stakeholders, promoting IAM best practices across teams.Security EngineeringAs you drive security engineering initiatives, you will play a key role in shaping the future of our identity and access management landscape.

At Intercom, we are revolutionizing customer service with AI technology, dedicated to empowering businesses to deliver exceptional customer experiences.Our AI agent, Fin, stands out as the most advanced customer service AI on the market, enabling businesses to provide seamless, around-the-clock customer support. When paired with our Helpdesk, it forms the comprehensive Intercom Customer Service Suite, designed to handle complex inquiries while maintaining a human touch.Since our inception in 2011, we've gained the trust of nearly 30,000 businesses worldwide, setting new benchmarks for customer service. Our commitment to our core values drives us to innovate, execute with urgency, and consistently offer outstanding value to our clients.What’s the opportunity?As a Staff Product Engineer, you will take on a pivotal leadership role within our engineering team, significantly impacting our technical direction. You will be responsible for designing and implementing both back-end and front-end systems, collaborating closely with designers, product managers, researchers, and data analysts. Additionally, you will mentor other engineers and work alongside the Engineering Manager to cultivate the team's growth and define our technical strategy.What will I be doing?In this role, you will:Shape our technical architecture to accommodate the increasing demands of our diverse customer base.Emphasize agility alongside scalability and reliability, with continuous deployment practices ensuring seamless incremental releases.Engage in all phases of software development, from ideation to prototyping, design, and implementation, blending hands-on coding with architectural leadership.Utilize cutting-edge tools and AI-powered developer resources to streamline your workflow and focus on impactful problem-solving.Participate actively in the recruitment, mentoring, and career progression of fellow engineers.Elevate the standards for technical excellence, performance, and operational reliability.

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.