Site Reliability Engineer at Trainline | London

Join our dynamic team as a Senior Site Reliability Engineer at Bumble Inc., where your expertise in Linux and system-level operations will be pivotal in managing complex production environments. We seek a proactive engineer capable of independently troubleshooting incidents, leading post-incident recovery efforts, and implementing enhancements to boost overall system stability, performance, and observability. This role is ideal for hands-on SREs with a solid foundation in Linux infrastructure and third-party system operations, focusing on optimizing large-scale environments of over 5,000 hosts utilizing technologies such as Kafka, Redis, and Kubernetes. Please note, this position centers on operational excellence rather than application development, requiring deep technical acumen and advanced troubleshooting capabilities.

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About Axon Axon’s mission is to safeguard life. The company develops devices and cloud-based software focused on public safety and justice. Teams at Axon work together to address complex challenges, valuing transparency, empathy, and a range of perspectives from users, communities, and colleagues. Role Overview: Senior Site Reliability Engineer I This position sits within the Site Reliability Engineering (SRE) team. The main focus: tackle real-time challenges across Axon’s mission-critical, cloud-native services. The work centers on maintaining the reliability and quality customers expect. Collaboration is key, both within the SRE group and across the wider engineering organization, to help product teams deliver new features consistently. Work Location and Flexibility This role is based in London, England, United Kingdom. Axon uses a hybrid working model. Team members are expected onsite from Tuesday to Friday, with remote work on Mondays (unless a workplace accommodation is granted). The company emphasizes in-person collaboration to support teamwork, mentorship, and shared success.

At Orgvue, we are at the forefront of organizational design and planning software, harnessing the transformative power of data visualization and modeling to help organizations become more adaptable and high-performing. Our platform empowers HR, finance, and business leaders to make swift, informed workforce decisions in an ever-evolving landscape.Trusted by some of the world's largest enterprises and renowned management consulting firms, Orgvue enables organizations to visualize and proactively shape their futures. Headquartered in London, we also have offices in Philadelphia, The Hague, Toronto, and Sydney.We are currently on the lookout for a Principal Site Reliability Engineer to join our team as a senior technical leader specializing in scaling and fortifying our AWS and Kubernetes-based infrastructure.Role OverviewIn this pivotal role, you will collaborate with product, platform, and operations teams to ensure our systems are reliable, observable, and resilient, even at scale. This position marries hands-on technical proficiency with strategic foresight, enabling us to cultivate a world-class reliability culture and a strong engineering framework for growth. We seek an individual with robust technical skills, exceptional communication abilities, and a passion for cross-team collaboration.Key ResponsibilitiesEstablish and uphold SLOs, SLIs, and error budgets across vital servicesDesign and execute a comprehensive cloud infrastructure and tooling strategyElevate SRE practices organization-wideImplement effective observability metrics, logs, and traces using our observability toolsLead the team in creating automated, self-healing systemsManage and refine our incident response protocols, including on-call practices and a post-mortem cultureMentor engineers throughout the organization on reliability best practices, operational readiness, and scalable infrastructureDrive Infrastructure as Code (IaC) initiatives using Terraform, Kubernetes, CloudFormation, and GitOps methodologiesWork closely with security, DevOps, and software teams to guarantee compliance, scalability, and operational excellenceAssess and introduce tools, patterns, and practices that enhance the performance and reliability of our SaaS platformQualificationsProven experience leading SRE transformationsExtensive hands-on expertise with Kubernetes (EKS preferred) in production settingsStrong proficiency with AWS core services (EC2, EKS, RDS, S3, ALB/NLB, IAM, CloudWatch, etc.)Expertise in Infrastructure as Code utilizing tools such as Terraform, with familiarity in GitOps workflowsSolid background in observability: metrics, visualization, logging, and tracingUnderst...

About Neo4j Neo4j builds a graph intelligence platform used by 84 of the Fortune 100 and supported by the world’s largest graph community. The platform powers knowledge graphs for AI, delivers reliable graph capabilities across cloud environments, and integrates with a wide range of systems. Neo4j’s technology is designed for precision, accountability, and governance, helping organizations turn data into actionable insights for intelligent applications and AI systems. Engineered for seamless operation in any cloud, Neo4j supports dynamic, personalized, and autonomous AI solutions. The focus is on delivering swift results, contextual knowledge, and solutions that improve both customer and employee experiences. Our Vision Neo4j’s mission is to help the world understand data. As business and society become more interconnected, Neo4j’s technology enables organizations to find and understand relationships within their data. The company pioneered the graph database category and continues to lead in helping teams innovate and stay competitive. About the Site Reliability Engineering Team The Site Reliability Engineering (SRE) team supports Neo4j’s Database as a Service (DBaaS) product, Neo4j Aura. Aura operates globally across all major cloud providers, running hundreds of Kubernetes clusters and managing thousands of Neo4j instances in production. This team is redefining SRE within Neo4j Aura. Rather than simply reacting to incidents, the SRE group empowers teams to design for reliability from the start. The work centers on building tools, practices, and a culture that embed SRE principles into the foundation of Aura’s operations. Collaboration with product teams and a commitment to resilience and engineering excellence are central to the team’s approach. What You Will Do Automate for insight and scale: Build systems that enable fast, safe, and scalable troubleshooting across thousands of Neo4j instances. This includes developing internal tools that provide actionable insights. Location London

Become a Force for Good with Axon.At Axon, our mission is to Protect Life. We are innovators tackling society’s most pressing safety and justice challenges through our integrated ecosystem of devices and cloud software. Like our products, we thrive on collaboration, connecting with transparency and empathy, and embracing diverse perspectives from our customers, communities, and each other.Working at Axon is fast-paced, challenging, and purposeful. Here, you will take the initiative and make a tangible impact. Constantly develop your skills as you dedicate yourself to a mission that matters within a company that values your contributions.Your ContributionJoin us in revolutionizing infrastructure automation for critical law enforcement systems. As a Senior Site Reliability Engineer, you will lead the creation of a cutting-edge infrastructure provisioning and automation platform. This platform allows engineering teams to independently access cloud infrastructure, ensuring safety and efficiency while minimizing manual interventions and operational risks.Your role will involve hands-on contributions to build and enhance systems leveraging automation and intelligent agents to generate, validate, test, and manage infrastructure at scale. We seek an engineer with a strong software development background, proficiency in programming languages such as Go or Python, and extensive experience in designing and operating cloud platforms, with a drive to enhance developer productivity, reliability, and platform robustness.Work Location:This position is based in our London office and follows a hybrid work schedule. We emphasize in-person collaboration, requiring team members to be onsite from Tuesday to Friday, with the option to work remotely on Mondays, unless a workplace accommodation has been approved. We believe that connection fuels innovation, and our in-office culture is designed to promote meaningful teamwork, mentorship, and collective success.Key ResponsibilitiesDevelop robust, user-friendly foundational platforms and tools that enable engineering teams to provision infrastructure quickly, consistently, and securely across diverse cloud providers.Write efficient, maintainable, and clear code in Go.Promote and uphold Infrastructure as Code (IaC) best practices and coding standards.Utilize strong problem-solving skills to troubleshoot issues in cloud-native distributed systems.Influence and educate the engineering organization on adopting new and improved architectural patterns.Provide comprehensive documentation to facilitate self-service by engineers.

About UsAt Heidi Health, we believe that healthcare deserves a more harmonious approach—one that ensures care remains continuous and deeply personalized. Our innovative AI Care Partner collaborates with healthcare providers to enhance the care experience for patients and clinicians alike.Our diverse team includes doctors, engineers, designers, researchers, and creatives, all dedicated to creating tools that empower clinicians to focus on what matters most: their patients.In just 18 months, we've reclaimed over 18 million hours for healthcare professionals, facilitating 73 million patient visits across 116 countries. Currently, our technology supports more than two million patient visits weekly worldwide.With nearly $100 million in funding, we are expanding our presence in the US, UK, Canada, and Europe, partnering with prestigious health systems such as the NHS, Beth Israel Lahey Health, and Monash Health.The OpportunityJoin our core Platform/SRE team, where you will take charge of production reliability. This role involves active incident response, on-call duties, system reliability, and daily operational oversight of Heidi’s platform.We welcome applications from mid-level SREs eager to embrace greater responsibility, as well as senior SREs who relish hands-on operational roles. This position emphasizes operational involvement and aims to maintain the health of real systems in production.Your ResponsibilitiesEngage in on-call and incident response: Address production incidents, assist in service restoration, and facilitate clear communication during incidents, escalating to leading incidents over time.Enhance operational reliability: Identify recurring issues and reliability risks, driving improvements through better alerting, automation, system enhancements, and process refinements.Manage production environment components: Operate and enhance Kubernetes clusters, cloud infrastructure, and core platform services, increasing responsibility as expertise grows.Boost observability: Refine dashboards, alerts, logs, and traces to enable earlier detection and faster diagnosis of issues, concentrating on actionable insights.Minimize operational toil: Automate repetitive tasks, streamline runbooks, and enhance tooling to facilitate smoother and safer on-call and daily operations.

Location: London, Waterloo (Hybrid, 4 days in-office - Wednesday is our designated work from home day, though you are welcome to join us in the office on Wednesdays if you prefer)At getground, we are revolutionizing one of the world's most significant asset classes: property. With over £2 billion in assets on our platform and a community of more than 30,000 users across 70 countries, we are shaping the future of asset ownership and tackling wealth inequality.Our innovative product streamlines property investing from start to finish, making real estate investment accessible to everyone.Your Key Responsibilities:Collaborating within cross-functional product teams to transition infrastructure and reliability initiatives from concept to live deployment.Thriving in a dynamic environment where autonomy and ownership are fundamental to our operations.Developing and sustaining a robust, scalable infrastructure within our GCP cloud ecosystem. Utilizing Kubernetes, Terraform, Cloudflare, and cutting-edge observability tools to ensure seamless platform functionality.Working closely with engineering teams to formulate CI/CD pipelines, enhance deployment methodologies, and advocate for reliability as a core engineering principle.Contributing to the establishment of SRE practices for a rapidly growing fintech platform. Mentoring fellow engineers as we expand our teams and influence.Your Day-to-Day Activities:Designing, implementing, and maintaining cloud infrastructure on Google Cloud Platform (GCP), ensuring it meets scalability, reliability, and security standards.Taking ownership of our Kubernetes clusters and containerization strategy, including Docker image optimization, cluster management, and deployment orchestration.Creating and optimizing Infrastructure as Code using Terraform, producing modular, testable, and well-documented configurations that adapt to our rapid growth.Managing and enhancing our Cloudflare infrastructure, including Workers for edge computing, DNS, CDN, security policies, and performance optimization.Implementing AI-powered product features in isolated and secure serverless environments.Establishing comprehensive monitoring and observability with Prometheus and Grafana, defining SLIs/SLOs, and proactively identifying potential issues before they affect users.Designing and maintaining CI/CD pipelines with appropriate quality gates, testing strategies, and deployment methodologies (blue-green, canary) to facilitate rapid deployments.

Senior Site Reliability Engineer At ClearScore, we pride ourselves on being a unique workplace that has revolutionized the financial services industry over the past decade. With millions of users benefiting from our services, our success is driven by a collaborative culture that values hard work, adaptability, and mutual respect. This environment empowers our team members to realize their full potential and achieve outcomes that profoundly impact our users' lives. Our mission is to enhance the financial wellbeing of our users by placing their needs at the forefront of our innovations. Leveraging advanced technology, insightful analytics, and stunning design, we help our users gain financial confidence and make informed decisions. We believe in fostering an environment where our employees can thrive, which is why we prioritize output over hours logged. We embrace an inclusive culture that encourages personal wellness while supporting career growth and development. Your Responsibilities: Drive architectural advancements by participating in RFCs, architecture forums, and company-wide initiatives to enhance reliability, scalability, and efficiency. Lead and advance ClearScore’s Kubernetes platform, focusing on designing, upgrading, and optimizing clusters at scale while shaping our Kubernetes usage across the organization. Independently troubleshoot and resolve complex production issues, utilizing a profound understanding of distributed systems and containerization to prevent and mitigate incidents. Design and contribute to Kubernetes controllers and automation tools that enhance our infrastructure and developer experience. Improve our AWS estate, ensuring cost-effectiveness, security, and scalability while promoting best practices across teams. Collaborate with developers to enhance service observability, implement strategic metrics and alerting, and create informative dashboards for intricate systems. Construct and maintain CI/CD pipelines from inception for new use cases, manage migrations, and introduce new tooling as necessary. Engage with open-source projects by providing fixes, feedback, or developing new tools aligned with our mission. Mentor mid-level SREs and other engineers, fostering their growth in technical mastery and operational excellence.

Join our dynamic Release Engineering team at Kaluza as a Site Reliability Engineer. In this pivotal role, you will play a crucial part in enhancing our software development lifecycle by developing innovative engineering solutions that empower our software teams to deploy high-quality code efficiently. Your efforts will significantly boost engineering productivity through the optimization of testing, deployment, and release processes across all Kaluza engineering teams.

About WheelyWheely is revolutionizing premium transportation in major cities across Europe, the United States, and the Middle East. We seamlessly integrate cutting-edge technology with the artistry of five-star chauffeuring to provide an unparalleled experience that has earned the trust of over 100,000 active riders and 1,200 corporate clients.As a profitable and rapidly growing scale-up, we have raised $43M and surpassed $100M in annual revenue. Following our recent launch in New York City, we are swiftly expanding across the US and EMEA. If you take pride in your craft and are eager to contribute to our next phase of growth, we invite you to connect with us.Our infrastructure has been rebuilt almost from the ground up over the past few years, and we are now seeking to further expand our infrastructure team.As a valued member of our team, you will focus on minimizing incidents related to availability, performance, and security. You will accelerate the delivery of new features to customers by building flexible, highly available, and secure infrastructure, ensuring a smooth journey for every customer.

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.

At Wayve, we are dedicated to fostering a diverse, fair, and respectful workplace culture that values the unique skills and perspectives of every individual, irrespective of sex, race, religion, belief, ethnic or national origin, disability, age, citizenship, marital status, domestic partnership, sexual orientation, gender identity, veteran status, pregnancy or related conditions (including breastfeeding), or any other basis protected by applicable law.About UsEstablished in 2017, Wayve is at the forefront of developing Embodied AI technology. Our cutting-edge AI software and foundational models empower vehicles to perceive, interpret, and navigate complex environments, significantly improving the usability and safety of automated driving systems.Our mission is to create autonomous solutions that drive the world forward. Our intelligent, mapless, and hardware-agnostic AI products cater to automakers, facilitating the shift from assisted to fully automated driving.We thrive on the challenges posed by a fast-paced environment—embracing uncertainty and tackling complex problems to unlock innovative solutions. We hold ourselves to high standards while remaining humble in our pursuit of excellence, constantly evolving to pave the way for a smarter, safer future.Your contributions at Wayve will truly make a difference. We celebrate diversity, embrace new ideas, and cultivate an inclusive work environment where we support each other to make an impact.Join us at Wayve and let your career take flight!The RoleAs a Senior Site Reliability Engineer in Vehicle Software, you will ensure the reliability, observability, and safety of Wayve’s autonomous driving fleet while operating on public roads. You will collaborate at the intersection of software, hardware, and operations, transforming real-world incidents and performance bottlenecks into sustainable engineering enhancements. This role provides a clear connection between your work and the delivery of safer deployments, accelerated iterations, and expanded fleet capabilities.

Join Wayve Technologies as a Staff Cloud Site Reliability Engineer and play a pivotal role in shaping the future of autonomous driving technology. In this position, you will leverage your expertise to enhance the reliability, performance, and scalability of our cloud infrastructure. Collaborate with cross-functional teams to design robust systems that can handle high traffic and ensure seamless operation.

Join our dynamic Systems Engineering team as a pivotal and trusted DevOps Engineer / Site Reliability Engineer. Collaborating closely with software engineers, you will design and implement mission-critical services and systems. Your role will involve managing infrastructure and services at scale, employing a diverse array of cutting-edge technologies that support our high-traffic, real-time Freelancer.com marketplace as well as various other business products deployed on Amazon Web Services. Our technology stack includes Nginx, MySQL, Redis, ElasticSearch, RabbitMQ, Consul, Docker, and Kubernetes. We aim to build highly resilient, dynamically scaling, self-healing systems by automating and monitoring all processes using tools such as Terraform, Puppet, Prometheus, Grafana, Kibana, and Jenkins.

Blockchain.com is at the forefront of revolutionizing finance, providing millions globally with secure access to cryptocurrency. Established in 2011, we have gained the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.Blockchain is the world's premier software platform for digital assets. We operate the largest production blockchain platform globally, driven by our passion for coding and building an open, accessible, and equitable financial future, one innovative software solution at a time.We are seeking a Site Reliability Engineer to join our Core team. This role involves advocating for infrastructure best practices across our organization, enabling us to securely scale a distributed financial platform that serves millions daily.Our distributed financial platform addresses some of the most fascinating challenges in the crypto space for our vast customer base and is experiencing rapid growth. The Site Reliability Engineering (SRE) team at Blockchain merges software and systems engineering to create a platform that simplifies complexity, enhancing security, reliability, and swift product delivery.The SRE organization at Blockchain is a dynamic environment focused on continual improvement. We foster a culture where team members can propose, discuss, design, and implement changes with a high degree of autonomy. We value abstract thinking to develop exceptionally effective tools and strive to eliminate toil.As a member of the Core team, you will gain a comprehensive understanding of our products' infrastructure needs. Your role will include establishing and maintaining innovative engineering solutions to enhance our customers' experience through the development of essential tools. Importantly, you will also mentor and guide developer teams to deliver new features in a rapid, secure, and scalable manner.

ABOUT XCEPTORAt Xceptor, data is the cornerstone of our operations. Our platform is intricately designed to facilitate comprehensive data manipulation. We harness data from diverse sources, ensuring it is curated, normalized, validated, repaired, and enriched. The data produced by Xceptor is reliable and trustworthy, meeting the high standards of our clients.Recognized as a leader in the Financial Services sector, we closely collaborate with Business Users in Middle and Back-Office teams, empowering them to address their data challenges independently, removing the dependency on technology-led projects.Our mission is to empower business users within financial institutions to create automated processes that yield trustworthy data.Our values include:Client CentricityOne TeamImpactful Your Role:As a Site Reliability Engineer (SRE), you will play a vital role in ensuring the reliability, performance, security, and operability of our services in production. You will collaborate with various teams across Xceptor, setting and evolving standards for SLOs/SLIs, observability, incident response, and operational controls. Your focus will be on building automation that reduces operational toil and enables safe and swift deployments in both cloud and on-premises environments.Xceptor employs an AI-first product development lifecycle, where AI agents act as digital partners, enhancing our design, build, testing, documentation, deployment, and operational processes. We engineer reliability through established standards, automation, and measurable signals, while maintaining human oversight for intent, constraints, verification, and accountability. What You’ll Be Doing:As a Site Reliability Engineer, you will enhance the functionality and reliability of our services, ensuring they operate optimally in production.

Air Apps builds technology to help people plan, work, and live better. Founded in Lisbon in 2018 and still family-led, the company has grown to San Francisco and now London, remaining self-funded and reaching over 100 million downloads. Every day, teams at Air Apps challenge assumptions and develop AI-powered products that make a difference for users worldwide. The company values creativity and aims to improve how resources are managed and lives are impacted. Role Overview The Site Reliability Engineer (SRE) will focus on keeping Air Apps systems reliable, available, and scalable. This role connects software development and operations, using automation, monitoring, and performance tuning to reduce downtime and strengthen system resilience. This is a fully onsite position based in the London Metropolitan Area. Air Apps will consider relocation support for the right candidate. The SRE will work closely with cross-functional teams in a busy office setting. What You Will Do Design and implement systems that are scalable, reliable, and fault-tolerant across cloud platforms. Develop and maintain observability tools for monitoring, logging, and alerting (such as Prometheus, Grafana, Datadog, ELK). Automate infrastructure provisioning, deployment, and incident response using Infrastructure as Code tools like Terraform or CloudFormation. Improve system performance, scalability, and incident response processes to maximize uptime. Work with development and DevOps teams to strengthen system designs for reliability. Conduct root cause analysis and implement steps to prevent future failures. Design and maintain strategies for load balancing, failover, and disaster recovery to ensure high availability.

What You'll Accomplish:As a Senior Data Reliability Engineer, you will spearhead the integration of Site Reliability Engineering (SRE) across all engineering practices. Your leadership will ensure that every engineer and team is dedicated to crafting software that is not only resilient but also exceptionally reliable. You will collaborate with a diverse, cross-functional team of subject matter experts and on-call engineers, focused on maintaining high performance of our platform around the clock.Overseeing a comprehensive suite of products, you will be responsible for the reliability of enterprise-grade applications that process thousands of queries per second. Elliptic is acclaimed for its extensive and dependable datasets, and your role will be pivotal in establishing a market-leading infrastructure for data quality and governance. This involves creating the processes, culture, and frameworks that will enhance observability, data quality, lineage, and remediation, forming a crucial backbone of our data and intelligence platform.Your Responsibilities:This role spans multiple teams, and you will receive full support from leadership and engineering while showcasing exemplary standards. Your main tasks will include:Promote the principles of SRE and DRE throughout the engineering teams.Lead the development of a data quality framework that assures our clients of the accuracy of our data and supports marketing and revenue initiatives.Define and manage the on-call process within the SRE function:Quickly gain an in-depth understanding of our systems.Lead incident management.Conduct post-incident reviews.Ensure timely completion of follow-up actions.Assess and enhance our existing end-to-end on-call processes.Participate in the on-call rotation, approximately every 4 to 5 weeks, ensuring 24/7 coverage.Evaluate, manage, and improve our current monitoring, alerting, paging, and documentation solutions.Provide reports on system uptime, availability, and performance across our product range.Draft post-mortem reports for both internal and external stakeholders.Represent the SRE and DRE functions during discussions with top-tier enterprise financial institutions.