Site Reliability Engineer

Last updated an hour ago
Location:Greater London
Job Type:Full Time

About us

At GoCardless, we’re passionate about payments. Our vision is to provide businesses with the best way to collect recurring payments, wherever they and their customers are in the world.

Today, we help over 55,000 businesses take the pain out of getting paid, so they can focus on what they do best. And through our partnerships with over 200 software providers such as Xero, Zuora, Salesforce and Quickbooks, more and more businesses are benefiting from our unique global payments platform every day. We process $15bn of payments a year across more than 30 countries, powering recurring payments for businesses worldwide, from multinational corporations to small businesses.

We’re headquartered in the UK, and backed by some of the world’s leading investors including Google Ventures, Salesforce Ventures, Balderton Capital, Accel Partners and Notion Capital. Over 400 employees worldwide have decided to develop their careers with us. We’ve built a friendly, collaborative culture where we hire and develop people who share our desire to do work we can be proud of. We value learning and feedback, and support colleagues to develop in their role and more broadly in their career.

Site Reliability Engineering at GC

As a Site Reliability Engineer you'll be part of a small team that sets the direction of the GoCardless core stack. You'll think through the moving pieces that make up our infrastructure and the complex interactions between them. You'll work with every other team within engineering – from product to data – to help build and scale the global platform our product sits on.

We take pride in our work, and open-source as much as we can. We’ve picked some examples of recent open-source work you can use to understand our remit, along with real-world examples of how our team operate from GitHub discussions:

  • Kubernetes extensions: We run a lot of our workloads in Kubernetes, and have extended our clusters with a suite of operators that we open-source at gocardless/theatre. We recently added support for authorised consoles, providing developers across GoCardless with a tool to securely administer and debug their application from within a production environment. See the PRs for this feature here.
  • HA Postgres tooling: GoCardless prefers Postgres for applications that need relational databases. We run large HA Postgres clusters using a tool called Stolon. Our SRE team built an extension for Stolon called stolon-pgbouncer which can provide zero-downtime failover between Postgres primaries, along with first-class integration with PgBouncer, a common Postgres connection pooler
  • Ensuring service reliability: As SREs, we work to ensure the reliability of our services. We recently upgraded our larger Postgres clusters to use the latest Postgres version on more powerful hardware. To ensure this change went smoothly, we wrote a load testing tool for Postgres called pgreplay-go that we used to replay production queries, helping us discover performance regressions. We also wrote a blog post about it.

About You

We use a large list of technologies and we will not expect you to have experience with all of them. We expect you to be enthusiastic about the infrastructure space, and the impact your work can have on others. To enjoy this work, we need you to be excited about learning new technologies and not afraid to tackle hard problems.

Ideally there’s a programming language you’ve become proficient in, and used it to build a project you’re proud of. We don’t mind what language this is, as long as you’re up to joining a team that focuses mostly on Go/Ruby. We’ll probably ask you about this during the interview - we’d love to hear what you’ve done!

Finally, you take pride in your work and aim to build solutions that solve real problems, as simply as possible. You appreciate (and try to build!) tools that are easy to understand and run with minimal effort. You want to work with people who share these values, and will continually push you to improve. You value receiving and giving feedback, and trust in your team.

Technologies (not exhaustive, subject to change!)

For much of your time, you’ll be building software in Go and Ruby. We manage our cloud resources with Terraform, our VMs with Chef, and our Kubernetes configuration with Jsonnet. You’ll also help run Postgres and MySQL databases, Elasticsearch, Vault, Prometheus, and a whole host of Google Cloud products like Pub/Sub, BigQuery and GKE.

You'll rely on:

  • Your fluency in one or more programming languages, and writing clean and effective code
  • Your ability to build reliable and well tested infrastructure on top of cloud computing systems
  • Your experience in designing, analysing, and troubleshooting distributed systems
  • Your knowledge of Unix fundamentals and TCP/IP networking

It's useful, but not essential to have:

  • Experience managing Kubernetes environments
  • Experience in relational databases and other stores, especially around optimising their performance

Life at GoCardless

Diversity is hugely important to us and we welcome applications from those with disabilities and from under-represented backgrounds. Throughout our hiring and onboarding process we make any reasonable adjustments necessary to create a level playing field and continually look at how we can improve in this area. We also have active ‘employee resource groups’ (such a BEAM and Rainbow) that are supported and sponsored by members of our Exec team; they work to engage and inspire our employees on diversity & inclusion topics throughout the year.

We offer flexible working hours and remote working arrangements, enhanced parental leave and pension packages. You’ll also receive equity, because we believe having this ‘buy in’ is a vital part of building a successful business where everybody - regardless of their role - can make a valuable contribution.

The COVID-19 pandemic has seen everybody at GoCardless shift to remote working and this is something we’ll continue to do into 2021. We continually review this approach in conjunction with the changing restrictions in each of our locations; additionally we offer support to maintain wellbeing and comfort, including subsidised home office equipment, workstation assessments and a range of remote social activities you can dip in and out of whenever you fancy.

Find out more about Life at GoCardless via Twitter, Instagram and LinkedIn.