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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Monzo Bank - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Distributed Systems, Web Applications, Backend, Cassandra, Docker - **Published:** August 5, 2026 - **Apply:** https://www.buscojobs.com.es/senior-software-engineer-en-madrid-ID-365521863 ## About the Role you have strong experience working on the backend of a technology product you want to be involved in building a product that you (and the people you know) use every day you have a product mindset: you care about customer outcomes and you want to make data?informed decisions you're comfortable working in a team that deals with ambiguity you're interested in distributed systems and writing resilient software you have some experience with strongly?typed languages (Go, Java, C, Scala etc.) you think you'd enjoy the kind of work we're doing ## Description 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 ***** 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 ??Barcelona, Spain |Base salary for this role is depending on experience + benefits | Hybrid model: 3 days a week in the officeAbout Our Engineering TeamsWe have over 400 engineers across Monzo who design and build our in?house banking platform.We have big ambitions for the future, and technology plays a big role in creating a bank our customers want, so engineers at Monzo collaborate across disciplines to solve interesting challenges throughout the company.These range from the products our customers use everyday to underlying infrastructure, security, payments and finance, customer operations, financial crime, and data, to name just a few areas.As a bank, there is scope for impact across a huge number of opportunities.We contribute toopen source softwareas much as possible.Ourblogis a good place to learn even more about what we do!Your day?to?dayThis role is all about collaborating with your team to make a difference to your customers.As a backend engineer you'll work in a squad alongside other disciplines like product managers, marketers, user researchers, designers, mobile engineers, web engineers, data analysts, business analysts, writers and more!Together you'll build and support a particular part of Monzo.Our squads belong to our widercollectives(a word we use to describe self?governing business units of ~100 people).They are Core Banking, Business Banking, Wealth, Borrowing, Growth, Payments, Platform, Fincrime, Security & Expansion.They're all looking for additional Backend Engineers right now, we do a standard interview process across all our collectives and at the end we will find the best match for you based on your skills, experience, preferences and aligning with the business need!Our backend engineers have a variety of different backgrounds.As long as you enjoy learning new things, we'd love to talk to you.We do not ask for formal qualifications or degree requirements for any of our engineering roles.You Should Apply Ifyou have strong experience working on the backend of a technology productyou want to be involved in building a product that you (and the people you know) use every dayyou have a product mindset: you care about customer outcomes and you want to make data?informed decisionsyou're comfortable working in a team that deals with ambiguityyou're interested in distributed systems and writing resilient softwareyou have some experience with strongly?typed languages (Go, Java, C, Scala etc.)you think you'd enjoy the kind of work we're doingWe're on the look out for L50 Engineers at the moment, you can read more in our Engineering Progression Framework - we will interview you across the whole framework, so if you are not sure what level you are aiming for please chat to your recruiters!Not ticking every box?That's totally okay!Studies show that women and people of colour might hesitate to apply unless they meet every single requirement.At Monzo, we're dedicated to creating a diverse and welcoming team.If you're passionate about this role and keen to learn and grow with us, we encourage you to apply- even if you don't have everything that's listed just yet.Drop us your application, we'd love to hear from you!What You'll Be Working OnWe hire very technically agnostic so whilst we use the below technologies we do not expect prior knowledge, you will be fully supported in our organised onboarding to get up to speed in the below:Go to write our application code (there's an excellent interactive Go tutorial here)Cassandra for most persistent data storageKafka for our asynchronous message queueKubernetes and Docker to schedule and run our servicesEnvoy Proxy for RPCAWS for most of our production infrastructure and GCP for most of our data infrastructureReact for our public web apps and internal toolsWe also have physical datacenters with actual cables to connect to various third partiesThe Interview ProcessInitial CallTake home task or pair coding exerciseFinal interview: including a system design and a behavioural interviewOur average process takes around 4 weeks but we will always work around your availability.One of our engineers has written a detailed blog on their experience through this process, for extra details, hints and tips please see here.What's In It For YouBase salary range for this role is depending on experience + equity + stock options & benefitsBarcelona, Spain? We offer flexible working hours and trust you to work enough hours to do your job well, at times that suit you and your team.Learning budget of €1,200 a year for books, training courses and conferencesEqual opportunities for everyoneDiversity and inclusion are a priority for us and we're making sure we have lots of support for all of our people to grow at Monzo.At Monzo, we're embracing diversity by fostering an inclusive environment for all people to do the best work of their lives with us.This is integral to our mission of making money work for everyone.You can read more in our blog, **** Diversity and Inclusion Report and **** Gender Pay Gap Report.We're an equal opportunity employer.All applicants will be considered for employment without attention to age, ethnicity, religion, sex, sexual orientation, gender identity, family or parental status, national origin, or veteran, neurodiversity or disability status.If you have a preferred name, please use it to apply.We don't need full or birth names at application stage#J-*****-Ljbffr ## Related Videos - [Maximising Cassandra's Potential: Tips on Schema, Queries, Parallel Access, and Reactive Programming](https://www.wearedevelopers.com/videos/1167-maximising-cassandra-s-potential-tips-on-schema-queries-parallel-access-and-reactive-programming) - [Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?](https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Building Real-Time AI/ML Agents with Distributed Data using Apache Cassandra and Astra DB](https://www.wearedevelopers.com/videos/782-building-real-time-ai-ml-agents-with-distributed-data-using-apache-cassandra-and-astra-db) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Spanish Business Culture and Etiquette](https://www.wearedevelopers.com/magazine/353-spanish-business-culture-and-etiquette) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers)