---
title: 'Software Engineer III at Monzo'
canonical: 'https://feeny.ai/job/software-engineer-iii-monzo-barcelona-m11sc0a8defq'
type: 'job'
last_seen: '2026-11-04'
---

# Software Engineer III at Monzo

- **Company:** Monzo
- **Location:** Barcelona, Spain
- **Posted:** 2025-04-04
- **Last confirmed live:** 2026-11-04
- **Apply:** https://job-boards.greenhouse.io/monzo/jobs/6758449

## Job 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](https://monzo.com/current-account/personal) and [business](https://monzo.com/business-banking) bank accounts, we offer [joint accounts](https://monzo.com/current-account/joint-account), [accounts for 16-17 year olds](https://monzo.com/current-account/16-17), a [free kids account](https://monzo.com/current-account/under-16s) and [credit cards](https://monzo.com/flex) in the UK, with more exciting things to come beyond. Our UK customers can also [save](https://monzo.com/savings), [invest](https://monzo.com/investments)and [combine their pensions](https://monzo.com/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 + Incentive Awards tied to your performance  + benefits Hybrid model: 3 days a week in the office

About our Engineering Teams:

We have over 650 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 to [open source software](https://github.com/monzo) as much as possible. Our [blog](https://monzo.com/blog/technology) is a good place to learn even more about what we do!

## Your day-to-day

This 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 wider collectives (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 if:

- 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

We're on the look out for L40 Engineers at the moment, you can read more in our [Engineering Progression Framework](https://monzo.com/documents/engineering-progression-framework-v3-0.pdf) you will be interviewed across the whole framework, so if you're not sure what level you're aiming for chat to your recruiter!

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 thats listed just yet. Drop us your application, we’d love to hear from you!

What you’ll be working on:

We 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](http://golang.org/) to write our application code (there’s an excellent interactive Go tutorial [here](https://tour.golang.org/welcome/1))
- [Cassandra](http://cassandra.apache.org/) for most persistent data storage
- [Kafka](http://kafka.apache.org/) for our asynchronous message queue
- [Kubernetes](http://kubernetes.io/) and [Docker](https://www.docker.com/) to schedule and run our services
- [Envoy Proxy](https://www.envoyproxy.io/) for RPC
- [AWS](http://aws.amazon.com/) for most of our production infrastructure and[GCP](https://cloud.google.com/) for most of our data infrastructure
- React for our public web apps and internal tools
- We also have physical datacenters with actual cables to connect to various third parties

The Interview Process:

Our interview process involves three main stages:

- Initial Call
- Take home task or pair coding exercise
- Final interview: including a system design and a behavioural interview

Our 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](https://monzo.com/blog/2022/03/23/demystifying-the-backend-engineering-interview-process).

What’s in it for you:

💰 Base salary for this role is depending on experience + Incentive Awards tied to your performance  + benefits

📍Barcelona, 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 conferences

## #LI-JS1

## Equal opportunities for everyone

Diversity 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](https://monzo.com/blog/diversity-and-inclusion), 2026 [Diversity and Inclusion Report](https://monzo.com/blog/our-2026-diversity-and-inclusion-report) and 2025 [Gender Pay Gap Report.](https://monzo.com/blog/gender-pay-gap-report-2025)

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 😊

## About Monzo

## Company Overview
- **One-liner**: Monzo is a UK-based digital bank offering personal and business current accounts, savings, loans, investments, and insurance through a mobile-first platform.
- **Entity Type**: Private (Series I, unicorn)
- **Headquarters**: London, United Kingdom (offices also in Cardiff, Dublin, and Barcelona)
- **Founded**: 2015
- **Founders**: Tom Blomfield, Gary Dolman, Jonas Huckestein Templestein, Jason Bates, Paul Rippon (current co‑CEOs are Diana Layfield and Conor Walsh)

## Core Business
- Primary industry/industries: Digital banking and financial services (consumer finance, payments, lending)
- Target customers: B2C (personal banking) and B2B/SMB (business banking); primarily UK‑based, with growing EU presence
- Mission or purpose statement: “Building a bank you’d be proud to use” – focused on solving problems, not selling financial products, and making money work for everyone.

## Products & Services
- **Personal Current Account**: Mobile‑banking account with budgeting tools, spending insights, and automated savings. Features real‑time notifications, card controls, and biometric authentication.
- **Business Current Account**: Separate account for small businesses with expense categorisation, invoicing, and integration with accounting software.
- **Savings Pots**: Sub‑accounts inside the app to save toward goals; includes interest‑bearing options.
- **Credit Cards & Loans**: Personal credit cards, overdrafts, and Flex (buy‑now‑pay‑later style borrowing). Also offers personal loans.
- **Investments**: Share dealing and ISA products (introduced in 2024).
- **Insurance**: Home, travel, and gadget insurance (underwritten by partners).
- **Pension Management**: Tools to manage and consolidate pension pots within the app.

## Market Standing
- **Valuation**: $5.2 B (current, per Tracxn; latest round Series I)
- **Key Metric**: Annual revenue £1 B+ (as of 31 Mar 2025), total funding $1.81 B
- **Notable Investors/Partners**: General Catalyst, Passion Capital, Accel (lead investors in previous rounds)
- **Growth Signals**: 15 million+ personal and business customers; headcount of ~3,786 (YoY growth 26.8% per Revelio Labs); expansion into EU via Dublin office; launched investment and pension products in 2024; continued lending product innovation (Flex, credit cards).

## Competitive Advantages
- **Community‑driven product development** – Customers actively suggest features, test the app, and give feedback, creating strong brand loyalty.
- **Mobile‑first architecture** – Built from scratch as a digital‑only bank, offering a seamless user experience with real‑time budgeting and spending insights.
- **Regulatory innovation** – One of the first UK challengers to obtain a full banking licence, enabling deposit‑taking and lending.
- **Open‑source culture** – Engages with the engineering community through open‑source contributions and transparent development.

## Strategic Focus
- **Product expansion**: Deepening lending and investment offerings, and building a wealth management suite.
- **International growth**: Scaling in the European market (office in Barcelona, Dublin hub, and hiring for EU‑focused roles).
- **Embedded finance**: Enabling third‑party services to use Monzo’s banking infrastructure.
- **Operational efficiency**: Using AI/ML for risk management, fraud detection, and personalised financial recommendations.

## Why Work Here
- **Culture**: Open, collaborative, and inclusive; regular community events, yoga, and lunch‑and‑learns; contributes to open‑source software.
- **Remote/Hybrid**: Office‑based roles allow occasional remote work; distributed workers receive equipment budget. Roles in London, Cardiff, Dublin, Barcelona, or UK‑remote.
- **Visas**: Monzo sponsors visas for tech, engineering, and product roles due to Home Office regulations.
- **Learning**: £1,000 annual budget for books, courses, and conferences; regular knowledge‑sharing sessions.
- **Compensation & Benefits**: Annual salary reviews; performance‑based incentive awards (cash/equity mix); pension (4% Monzo contribution, matching up to 6%); private healthcare; life insurance (4x salary); 26 days holiday + bank holidays (or opt‑out for 34 days); 8‑week sabbatical every 5 years; generous family leave (primary caregiver 26 weeks full pay, secondary 13 weeks full pay); paid sick leave; cycle‑to‑work scheme.
- **Office Perks**: Free breakfast, hot lunches twice a week, snacks, and drinks in London office.

## Sources
1. [monzo.com/careers](https://monzo.com/careers) – Benefits, visa policy, flexible working, culture
2. [monzo.com/about](https://monzo.com/about) – Company overview, mission, customer count
3. [tracxn.com/d/companies/monzo](https://tracxn.com/d/companies/monzo/__HguZJzK7Q_qZsyIz1Y4VwV75H5fHjDMtGaXPelPAxpU) – Funding, valuation, revenue, employee count, founders, CEOs
4. [job-boards.greenhouse.io/monzo](https://job-boards.greenhouse.io/monzo/jobs/7963253) – Open roles, location details
5. [reveliolabs.com/companies/monzo-bank/employees](https://www.reveliolabs.com/companies/monzo-bank/employees/) – Headcount growth

## Other roles at Monzo

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