Site Reliability Engineer

Capital on Tap

We’re Capital on Tap 👋 💳 Capital on Tap started because small businesses were underserved. Big banks were slow, their products weren't fit for purpose, and small business owners often couldn't access what they needed. We set out to fix that. Today we're a financial platform - not just a credit card company. We offer a best-in-class business credit card, SME-focused spend management platform, a savings product that hit £1 billion in funds within its first year, and a growing suite of tools and financial products that make running a small business easier.  1,000+ employees, £20bn in annual card spend, 200,000+ customers, 17,000+ Trustpilot reviews averaging 4.7 stars, and we're profitable. We’ve done a pretty good job so far, but we’re just getting started!  📍London, Old Street | 🏢 2 Days in Office SRE at Capital On Tap 🌞 At Capital On Tap, we run a hybrid embedded SRE model. We aim to work closely with the teams within Capital On Tap to provide them the best support. Our main objective currently is to gain as much visibility into our platform's health while offering scalable solutions.  What You’ll be doing:  As a Site Reliability Engineer (SRE) you will help ensure our platforms are fast, reliable, and scalable. You’ll design, build, and monitor systems, prevent issues before they happen. Using SLAs, SLIs, and SLOs, you’ll guide feature launches while maintaining services that everyone can depend on. * Manage and automate Azure, Datadog, NGINX & Cloudflare * Develop and monitor Kubernetes and Serverless resources * Maintain infrastructure code with Terraform & CRDs / Crossplane * Improve systems, processes, and technologies; consult stakeholders to enhance platform performance * Getting involved in new application architecture & design processes * Design solutions to reduce toil, automate repetitive tasks and streamline workflows to reduce manual work and boost team productivity. * Create SLIs and SLOs; increase application visibility * Align with the Product team on SLAs and core service objectives * Collaborate with Platform Engineers for automated solutions and pipelines * Enhance user experience with infrastructure and pipeline optimisation  * Support CI/CD tools such as Azure Devops, Octopus Deploy and Flux to streamline software delivery * Lead incident troubleshooting to safeguard customer experience We’re Looking For 🔎 Required skills: * Experience in managing a public cloud (Azure advantageous) * Experience in Azure DevOps, Octopus, Flux or other CI/CD tools * Experience with Linux and Microsoft Systems * Excellent communication skills and ability to collaborate with multiple teams in an agile environment * Proficient in contributing to IaC technologies involving expertise in writing, managing, and optimising infrastructure with tools such as Terraform and Pulumi  * Experience working with a cloud monitoring solution (advantageous to have DataDog)  * Experience with Kubernetes and Docker * Experience in at least one scripting language (Python, PowerShell, Go)   Interview Process 🤝 * First stage: 30-minute intro, CV review, and values with Talent Partner * Second stage: 60 minute “Tech Chat” with Team Manager * Final stage: 75-minute Technical Task + 30 minute Interview with Head of Platform Engineering Diversity & Inclusion 🌈 We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work. Great Work Deserves Great Perks We try not to take ourselves too seriously (all the time) so we make sure our office is decked out with a pool table, arcade machine, beer tap, and a couple of office dogs thrown in for good measure. Check out our benefits: 🏥 Private Healthcare including dental and opticians services through Vitality ✈️ Worldwide travel insurance through Vitality 🎁 Anniversary Rewards (£250, £500, £750, 4-week fully paid sabbatical) 👛 Salary Sacrifice Pension Scheme up to 7% match 🏖️ 28 days holiday (plus bank holidays) 📖 Annual Learning and Wellbeing Budget 👪 Enhanced Parental Leave 🚲 Cycle to Work Scheme 🚂 Season Ticket Loan 💬 6 free therapy sessions per year 🐶 Dog Friendly Offices 🍫 Free drinks and snacks in our offices Check out more of our benefits, values and mission here.   Other Info 👍Check out our ‘Top Tips’ for interviewing. ✔️Keep updated on new job opportunities by following us on Linkedin. 📧Email careers@capitalontap.com if you have any questions. Excited to work here? Apply! If you’d like to progress your career within our fast growing, profitable fintech then click apply and we will aim to get back to you within 3 working days (during busy periods this could take up to 5 working days.)

GoCardless

About us GoCardless is a global bank payment company. Over 100,000 businesses, from start-ups to household names, use GoCardless to collect and send payments through direct debit, real-time payments and open banking.  GoCardless processes US$130bn+ of payments annually, across 30+ countries; helping customers collect and send both recurring and one-off payments, without the chasing, stress or expensive fees. We use AI-powered solutions to improve payment success and reduce fraud. And, with open banking connectivity to over 2,500 banks, we help our customers make faster, more informed decisions. We are headquartered in the UK with offices in London and Leeds, and additional locations in Australia, France, Ireland, Latvia, Portugal and the United States. At GoCardless, we're all about supporting you! We’re committed to making our hiring process inclusive and accessible. If you need extra support or adjustments, reach out to your Talent Partner — we’re here to help!  And remember: we don’t expect you to meet every single requirement. If you’re excited by this role, we encourage you to apply! PLATFORM ENGINEERING AT GOCARDLESS The Platform Engineering team is a unified, globally distributed team. We are currently located in London, Riga, and Lisbon. We work with all other engineering teams to empower them to build, release, run and scale their products. We operate with a strong focus on both strategic project delivery and operational excellence. OUR WORK IS A BALANCE OF: * Project Delivery: Building new platform components, from initial design to deployment. * Operational Support: Ensuring the health and stability of our systems through on-call rotations and incident management. * Business as Usual (BAU): Continuous maintenance, improvements, and support for audits and compliance. TECH STACK AND TOOLS: * Python, Ruby, Golang; * Terraform; * Atlantis  * AWS, GCP; * Kubernetes, GKE; * Github, GitHub Actions, ArgoCD; * Grafana, Prometheus; * Datadog WHAT EXCITES YOU: We use a wide range of technologies, and will never expect you to have experience with all of them. We do hope that you are enthusiastic about the infrastructure space and the impact your work can have on others. To enjoy this work you’ll be excited by: * Building and maintaining automation of new and existing infrastructure; * Appreciate and believe in building easy-to-understand and maintain tools to solve problems; * Automating operational tasks to eliminate toil using your software development skills and experience; * Ensuring that systems are safe and secure against cybersecurity threats; * Working closely with software engineers and data scientists; * Being involved in the technical design of architecture and making technical decisions; * Cloud-first engineering; * Ongoing opportunities to further develop your skills; * Care about working with people who share the same values as you and who will continually push you to grow. WHAT EXCITES US  * Experience with at least one programming language such as Python, Ruby, Golang etc.; * Experience with IaC tooling, such as Terraform; * Previous experience with Terraform automation toolings such as Terragrunt or Atlantis will be considered an advantage; * Experience with cloud computing providers such as AWS or GCP; * Experience with containerized applications; * Previous experience with container orchestration such as Kubernetes and GKE will be considered an advantage; * Experience with CI/CD tooling such as Github, GitHub Actions, ArgoCD, etc.; * Experience working with monitoring tooling such as Grafana, Prometheus, etc.; * Experience with relational databases and other datastores, especially around high availability and performance optimisation; * Awareness of DevOps and Agile principles; * Fluency in English; * Excellent teamwork and communication skills.   Base salary range: £78,400 - £117,600  Base salary ranges are based on role, job level, location, and market data.  Please note that whilst we strive to offer competitive compensation, our approach is to pay between the minimum and the mid-point of the pay range until performance can be assessed in role. Offers will take into account level of experience, interview assessment, budgets and parity between you and fellow employees at GoCardless doing similar work. (SOME OF) THE GOOD STUFF * Wellbeing - stay healthy with dedicated support and medical cover * Work away scheme - gives you the option to work away from your country of residence for up to 90 days in any 12 month period * Adaptive Working - allows you to work flexibly, around your lifestyle * Equity - all permanently employed GCs get equity to help you make a valuable contribution * Parental leave - to suit everyone embarking on life's great adventure * Learning Budget - lead your own development with an annual learning budget * Time off - generous holiday allowance, + 3 annual volunteer days, + 4 annual business-wide wellness days (‘GC Fridays’) LIFE AT GOCARDLESS   We're an organisation defined by our values; We start with why before we begin any project, to ensure it’s aligned with our mission. We act with integrity, always. We care deeply about what we do and we know it's essential that we be humble whilst we do it. Working this way creates the GC magic- the reason we all love showing up to work.  DIVERSITY & INCLUSION As of April 2025, we had 806 employees (GeeCees) globally, with 524 based in the UK, 163 based in Latvia and 119 across our other offices. To ensure that we're representative of the world around us - and to be able to review relevant benchmarks - we ask GeeCees to voluntarily disclose diversity data. This year, the proportion of GeeCees providing data increased to 88% (up from 79% in 2024). With regards to diversity within GoCardless, we can see GeeCees identifying as: Asian, Black, Mixed or Other — 25%  Neurodiverse — 9%  LGBTQIA+ — 9%  Disabled — 1%  Average age — 33 Female — 45% Male —  55%  We’re rooting for you during your application and GoCardless aims to provide reasonable adjustments to make our recruitment process as remarkable and accessible as we can. Please speak to your Talent Partner if you need extra support. If you want to learn more, you can read about our Employee Resource Groups and objectives here Sustainability We’re committed to reducing our impact on the environment, leaving a more sustainable world for future generations. Check out our sustainability action plan here. Find out more about Life at GoCardless via Twitter, Instagram and LinkedIn.

Signal AI

At Signal AI, we use cutting-edge AI technology to offer clarity on decisions that shape businesses and society. We value restless curiosity, creative thinking, and diverse perspectives as we strive to become AI-native. We believe that AI is a collaborator, not just a tool, and we invite passionate individuals to join us on our journey as we continue to learn, experiment, and grow together. We're hiring an SRE to help us run and evolve the infrastructure behind Signal AI's decision intelligence platform.   You'd be joining a small, collaborative Infrastructure team at a moment when the work is genuinely changing shape. Over the last year we've hardened the platform, reduced cost, and built serious observability into our highest-volume systems. The next year is about scaling that work, absorbing infrastructure from a recent acquisition, and being thoughtful about how AI shows up in operational work: not as a gimmick, but as a tool we trust ourselves to use well.   We're looking for someone who wants to shape the direction of the team; someone who brings curiosity and care to the work, and who wants to leave things meaningfully better than they found them.   What we've shipped recently   * Cut ~$50k/year off our Elasticsearch bill by migrating compute to more efficient chips. (Apr 2026) * Built the foundation for our MCP server platform: leveraging and contributing to open-source tooling to give the whole company extensible, production-grade AI integrations. (2025–2026) * Rebuilt production from scratch in a full DR gameday. End-to-end restore validated across our multi-account AWS setup. (Jan 2026)   What we're working on next   * AI-augmented operations: Claude Enterprise is deployed across Signal. We want this team to help define what good looks like for SRE: incident triage, runbook generation, capacity planning, cost analysis. This is a strategic investment, not a side project: and we'd love someone genuinely curious about what these tools can and can't do. * Security in the age of AI The threat landscape has shifted. Supply chain security is more at threat than ever, and powerful models are emerging that promise to change how the industry thinks about security. We're looking for someone interested in thinking seriously about what actually matters to protect now. * Acquisition integration: Bringing a recently acquired product's infrastructure under our reliability, security, and operational standards. A substantial, multi-quarter piece of work with real technical and organisational complexity, and plenty of room to make your mark. * Batch workload consolidation: Moving disparate batch jobs onto EKS for unified scheduling, cost visibility, and operational tooling.   Your first six months   We want to set you up to thrive. Here's what that looks like in practice:   * Month 1: You're onboarded across our AWS estate, Terraform, and observability stack. You've completed your first on-call shift with support from the team, landed your first PR in the DevOps repo, and started working Claude Enterprise into your daily flow. * Month 3: You're owning a workstream end-to-end. You've led the SRE response to at least one production incident and hosted your first post-mortem. You’ve surfaced a real opportunity that you've pushed to a measurable result. * Month 6: You're driving a multi-quarter workstream with clear direction, and you're contributing insights to our AI-in-operations playbook: including where Claude adds real leverage and where it doesn't.   What we’re looking for You have solid AWS and Terraform experience, and you're comfortable writing Python or Go to solve operational problems. You think in distributed systems: failure modes, observability, blast radius: and you take problems end-to-end rather than stopping at the edges of your own work.   You're pragmatic about AI tooling. Not evangelical, not dismissive. You can tell us when you'd reach for an LLM and when you wouldn't, and you'd have a clear reason either way.   You communicate openly and you're comfortable pushing back when you think something could be better. We want to leverage your experience and perspective to grow our platform.   We know not every strong candidate will have every skill on this list. If you're excited about the work and you're close on the experience, we'd encourage you to apply.   Nice to haves * Networking depth. You're comfortable below the load balancer: TCP/IP fundamentals, DNS, VPC design, and what actually happens when a service can't reach another one. * Operational security instincts. You follow the threat landscape with genuine interest: not just CVEs, but shifts in how attacks happen and how the industry is responding. You have a point of view on what actually matters right now. * Linux internals comfort. When something behaves strangely under load, you know where to look. * Communication across technical levels. You can collaborate with your infrastructure teammates and explain the same concepts clearly to a product manager. You've worked alongside colleagues with a wide range of technical backgrounds and adapted naturally. Not sure you meet every requirement? Studies show that women and other underrepresented groups often hesitate to apply unless they check every box. At Signal AI, diverse perspectives strengthen our teams, drive innovation, and lead to better performance. So even if your background doesn’t align perfectly with each qualification, we encourage you to apply if you’re passionate about this role. We're dedicated to creating an inclusive environment where every Signaller feels welcomed, valued, and heard—a place where you can truly thrive as yourself.