Senior Staff Software Engineer, Platform
Senior Staff Software Engineer, Platform

Senior Staff Software Engineer, Platform

Full-Time 135000 - 184000 ÂŁ / year (est.) Home office (partial)
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Monzo Bank

At a Glance

  • Tasks: Lead technical projects and solve complex challenges in a dynamic environment.
  • Company: Join Monzo, a forward-thinking bank with a collaborative culture.
  • Benefits: Enjoy a competitive salary, share options, and a ÂŁ1,000 learning budget.
  • Other info: Flexible working hours and remote work support available.
  • Why this job: Make a real impact on platform resilience and developer experience.
  • Qualifications: Strong software engineering skills and experience with cloud systems.

The predicted salary is between 135000 - 184000 ÂŁ per year.

We are looking for a Senior Staff Engineer (L70) to join our Platform collective. This is a technical leadership role with company‑wide influence, working closely with cross‑functional teams to improve Monzo’s platform resilience and enable our engineering community to build reliable, performant systems.

Senior Staff Engineer Responsibilities

  • Be hands‑on and deeply technical with code and infrastructure, solving complex technical challenges.
  • Partner with the Engineering Director for Platform and other ICs to provide technical leadership around resilience across Monzo.
  • Build a deep understanding of the platform and strengthen the reliability surface between teams by enhancing tools, patterns and guardrails.
  • Promote and maintain a culture where every engineer feels supported to design, build and operate reliable systems at global scale.
  • Understand cross‑team work streams, regularly providing technical advice and challenging peers.
  • Lead architectural discussions for the most complex systems, arriving at robust, optimal solutions given context.
  • Champion high standards by celebrating success and providing constructive feedback.
  • Foster a culture of quality, championing measures to test work and making quality tooling easy.
  • Pro‑actively mentor, sponsor and up‑level engineers.

What We’re Looking For

  • Solid software engineering foundations – robust backend services written in strongly typed languages.
  • Hands‑on experience with AWS, GCP and Kubernetes; deep experience designing and maintaining global, resilient cloud systems.
  • Infrastructure as Code expertise (e.g., Terraform) and a mindset of solving problems through automation.
  • System curiosity – a drive to investigate complex issues and understand how distributed applications fail and scale.
  • Platform mindset – enthusiasm for building a platform that enables success for everyone at Monzo, focusing on reliability, performance and developer experience.
  • Comfort with ambiguity in a fast‑paced, evolving environment.

Tools & Technologies

  • Go for application code
  • Cassandra for persistent data storage
  • Kafka for asynchronous messaging
  • Kubernetes & Docker for service orchestration
  • AWS (production) and GCP (data infrastructure)
  • React for internal web dashboards
  • Feast for feature‑flag and model deployment orchestration

Benefits

  • Competitive salary, share options and a comprehensive benefits package.
  • Relocation support to the UK and visa sponsorship available.
  • Flexible working hours and support for remote work with provided MacBooks.
  • ÂŁ1,000 annual learning budget for books, training courses and conferences.
  • Additional benefits available – see our full list of benefits.

Interview Process

  • Recruiter Call
  • Initial Call
  • System Design Interview
  • Take‑home Task or Pair‑Coding Exercise
  • Final Interview – behavioural and leadership components

The process typically takes 3–4 weeks. We’ll be flexible to accommodate your schedule.

Equal Opportunities

Monzo is an equal‑opportunity employer. All applicants will be considered for employment without consideration of age, ethnicity, religion, sex, sexual orientation, gender identity, family or parental status, national origin, veteran, neurodiversity or disability status. We welcome people with preferred names and do not require full or birth names at the application stage. Monzo embraces diversity by fostering an inclusive environment for all people to do the best work of their lives.

EEO Statement

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.

Senior Staff Software Engineer, Platform employer: Monzo Bank

Monzo Bank is an exceptional employer that prioritises a supportive and inclusive work culture, empowering engineers to thrive in their roles. With competitive salaries, share options, and a generous learning budget, employees are encouraged to grow and innovate within a flexible environment. Located in London, Monzo offers unique opportunities for technical leadership and collaboration across teams, making it an ideal place for those seeking meaningful and rewarding employment in the tech industry.
Monzo Bank

Contact Detail:

Monzo Bank Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Staff Software Engineer, Platform

✨Tip Number 1

Get your hands dirty with the tech! When you’re in interviews, don’t just talk about your experience; show them your passion for coding and problem-solving. Bring examples of how you've tackled complex challenges in the past.

✨Tip Number 2

Network like a pro! Connect with current Monzo employees on LinkedIn or attend tech meetups. Having someone inside can give you insights into the company culture and maybe even a referral!

✨Tip Number 3

Prepare for those architectural discussions! Brush up on your system design skills and be ready to discuss how you would approach building resilient systems. They want to see your thought process, so think out loud!

✨Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining the Monzo team. Let’s get you that interview!

We think you need these skills to ace Senior Staff Software Engineer, Platform

Technical Leadership
Software Engineering Foundations
Backend Services Development
AWS
GCP
Kubernetes
Infrastructure as Code (Terraform)
Problem Solving through Automation
Distributed Systems Understanding
Reliability and Performance Focus
Mentoring and Sponsorship
Go
Cassandra
Kafka
React

Some tips for your application 🫡

Show Your Technical Skills: Make sure to highlight your solid software engineering foundations and hands-on experience with the tools mentioned in the job description. We want to see how you've tackled complex technical challenges in the past!

Tailor Your Application: Don’t just send a generic application! Take the time to tailor your CV and cover letter to reflect how your experience aligns with the responsibilities and requirements of the Senior Staff Engineer role at Monzo. It shows us you’re genuinely interested.

Be Clear and Concise: When writing your application, keep it clear and concise. We appreciate straightforward communication, so make sure your points are easy to understand and get straight to the heart of your experience and skills.

Apply Through Our Website: We encourage you to apply through our website for the best chance of being noticed. It’s the easiest way for us to track your application and ensure it gets into the right hands!

How to prepare for a job interview at Monzo Bank

✨Know Your Tech Inside Out

Make sure you’re well-versed in the technologies mentioned in the job description, like AWS, GCP, Kubernetes, and Go. Brush up on your coding skills and be ready to discuss your hands-on experience with these tools, as they’ll likely come up during technical discussions.

✨Showcase Your Leadership Skills

As a Senior Staff Engineer, you’ll need to demonstrate your ability to lead architectural discussions and mentor others. Prepare examples of how you’ve successfully led projects or teams in the past, focusing on how you’ve fostered a culture of quality and collaboration.

✨Understand Monzo’s Platform Mindset

Familiarise yourself with Monzo’s approach to building reliable and performant systems. Think about how you can contribute to their platform resilience and developer experience, and be ready to share your ideas on enhancing tools and patterns during the interview.

✨Prepare for Behavioural Questions

Since the final interview will include behavioural components, think about your past experiences and how they align with Monzo’s values. Be ready to discuss challenges you’ve faced, how you’ve handled ambiguity, and how you’ve supported your peers in a fast-paced environment.

Senior Staff Software Engineer, Platform
Monzo Bank
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