Senior Staff Backend Engineer

🚀 We’re on a mission to make money work for everyone.We’re waving goodbye to the complicated and confusing ways of traditional banking.After starting as a prepaid card, our product offering has grown a lot in the last 10 years in the UK. As well as personal and business bank accounts, we offer joint accounts, accounts for 16-17 year olds, a free kids account and credit cards in the UK, with more exciting things to come beyond. Our UK customers can also save, invest and combine their pensions with us. With our hot coral cards and get-paid-early feature, combined with financial education on social media and our award winning customer service, we have a long history of creating magical moments for our customers!We’re not about selling products - we want to solve problems and change lives through Monzo ❤️📍London / UK Remote | 💰 £155,000 - £200,000 + Equity | Benefits | TechnologySenior Staff Engineer: L70 on our Engineering Progression Framework About our Engineering Teams:We have around 600 engineers out of roughly 5,000 people in total - and we have big ambitions. There are many interesting challenges ahead, and we're happy for people to move between teams or to specialise, whatever you prefer. As an engineer here you'd be able to work directly with anyone across the company, and we run regular knowledge-sharing sessions so you’ll learn heaps about everything from how banks work to effective communication.We contribute toopen source software as much as possible. Ourblogis a good place to learn even more about what we do.Senior Staff Engineer Responsibilities:A Senior Staff Engineer at Monzo is a hands on engineering leadership (IC) position. As a Senior Staff Engineer you’ll:Partner with Engineering Directors to shape the technical and product direction of a collective, providing leadership across multiple squads (30–70+ engineers) and ensuring alignment with company-wide priorities.Be hands on in both coding and architecture, leading from the front.Partner closely with Product and Design leadership to define strategy, shape roadmaps, and make high-quality trade-offs that maximise business and customer impact across the collective.Mobilise teams across your collective around high-impact problems, creating clarity, alignment and momentum, injecting urgency when needed, or slowing things down to ensure safety and long-term sustainability.Lead and influence architectural direction for the most complex systems, ensuring cohesive, scalable designs across multiple teams and aligning local decisions with the broader system strategy.Set and uphold a high bar for technical excellence across the collective, driving improvements in quality, reliability and scalability, and fostering a culture where engineers hold each other to that standard.Proactively mentor, sponsor and develop senior engineers and future leaders, multiplying your impact by enabling others to operate at a higher level.What you’ll be using/ What you’ll be working on: We rely heavily on the following tools and technologies:Go to write our application code (there’s an excellent interactive Go tutorialhere)Cassandra for most persistent data storageKafka for our asynchronous message queueKubernetes andDocker to schedule and run our services AWS for most of our production infrastructure and GCP for most of our data infrastructure.React for internal Web dashboardsFeast for storing our features along a variety of tools to train and deploy models.🤩We’d love to hear from you if… You have a track record of leading complex, high-impact systems and driving technical direction across multiple teamsYou combine strong technical judgment with product and business awareness, making pragmatic trade-offsYou’ve worked on scalable backend, distributed or data-intensive systemsYou’re comfortable operating in ambiguous problem spaces, helping teams define direction and executeYou influence and align senior stakeholders across engineering, product and beyondYou care about outcomes and impact, using data to guide decisionsYou enjoy mentoring and raising the bar for other engineersHow we work 💻Locations & Flexible Working: Our main tech hub is in London, but our engineers live everywhere in the UK— from Brighton to the Western Isles. We value meeting in person but we don't have a mandated requirement on office attendance, even if you're nearby. We believe you'll do your best work if you are where you want to be. If you live outside of London and we ask you to come into the office, Monzo will support you with the costs. ✨Our offices are naturally social, especially Tuesdays, Wednesdays and Thursdays, which happen to line up with our twice-weekly Monzo lunches & treat Thursdays 🍽️. Teams also schedule time together often for work and play – in or around the office, or online.Set up a work schedule that delivers impact and fits your life:At Monzo, we value connections, flexibility, and wellbeing. We keep our meetings during core hours to stay connected and believe in maintaining w