Senior Site Reliability Engineer

Mesh-AI Limited; Greater London; Hybrid; GBP 75,000 - GBP 90,000; Full time

Job summary

A leading technology company in Greater London is seeking a seasoned Site Reliability Engineer (SRE) to enhance their Kubernetes platform and AWS architecture. The role requires expert knowledge in Kubernetes and AWS, and involves driving architectural improvements, resolving production issues, and building CI/CD pipelines. The ideal candidate will have a strong focus on automation and infrastructure optimization. Join us for a flexible hybrid work environment, fostering innovation and collaboration among teams.

Benefits

Flexible work hours

Professional development opportunities

Dynamic hybrid work environment

Qualifications

• Experience with Kubernetes cluster upgrades and troubleshooting.
• Strong knowledge of AWS architecture and networking.
• Ability to automate infrastructure and deployments.
• Experience designing and operating distributed systems.

Responsibilities

• Drive architectural change for improved reliability and scalability.
• Lead the Kubernetes platform and optimize clusters.
• Troubleshoot complex production issues independently.
• Build and maintain CI/CD pipelines for new use cases.

Skills

Expert-level Kubernetes knowledge

Strong AWS expertise

Deep understanding of Linux internals

Proficiency in compiled and interpreted languages

Strong scripting skills

Experience with distributed systems

Strong networking fundamentals

Hands-on experience with CI/CD pipelines

Deep observability expertise

Tools

AWS

Kubernetes

Jenkins

ArgoCD

Spinnaker

Job description

ClearScore is a workplace like no other. Over the past ten years, we’ve disrupted an entire industry and built a user base of millions. At the heart of this success is our culture: we work hard, embrace change, and treat each other with respect, enabling everyone to reach their potential and deliver results that truly make a difference.

We’re on a mission to positively impact the lives of our users. Our product puts their needs at the centre of our thinking. Through cutting‑edge technology, insightful analytics and beautiful design, we help our users build financial confidence and make better financial decisions.

We want our people to perform at their best, so we trust everyone to work in a way that suits them, focusing on output rather than time spent at a screen. We have an inclusive culture where everyone is encouraged to look after their wellbeing while growing and developing their career.

What you will be doing:

• Drive architectural change by participating in RFCs, architecture forums and platform‑wide initiatives to improve reliability, scalability and efficiency
• Lead and evolve ClearScore’s Kubernetes platform, designing, upgrading and optimising clusters at scale while shaping how we use Kubernetes across the company
• Troubleshoot and resolve complex production issues independently, using a deep understanding of distributed systems and containerisation to mitigate and prevent incidents
• Design and contribute to Kubernetes controllers and automation tools to improve our infrastructure and developer experience
• Enhance our AWS estate, ensuring cost efficiency, security and scalability while promoting best practices across teams
• Collaborate with developers to improve service observability, implement metrics and alerting strategies, and build meaningful dashboards for complex systems
• Build and maintain CI/CD pipelines from scratch for new use cases, manage migrations, and introduce new tooling where beneficial
• Contribute to open source projects through fixes, feedback or new tools aligned with our mission
• Mentor and guide mid‑level SREs and other engineers, helping them develop deep technical expertise and operational excellence

Skills we'd love you to have

• Expert‑level Kubernetes knowledge, including experience with cluster upgrades, networking (CNI), container runtimes and troubleshooting node‑level issues
• Strong AWS expertise, including architecture, networking and cost management, with an awareness of industry standards and the ability to influence adoption across teams
• Deep understanding of Linux internals, containerisation and operating system‑level performance tuning
• Proficiency in at least one compiled language (for example Go, Rust or C++) and one interpreted language (for example Python or Bash)
• Proven ability to automate infrastructure, deployments and monitoring with strong scripting skills across multiple languages
• Experience designing, deploying and operating distributed systems with complex failure modes
• Strong networking fundamentals, capable of debugging complex routing or firewall issues and designing resilient architectures
• Hands‑on experience with CI/CD pipelines and tooling such as Jenkins, ArgoCD or Spinnaker, including building and managing large‑scale migrations
• Deep observability expertise, from instrumenting applications and building dashboards to managing large monitoring stack upgrades and integrations

Why ClearScore?

ClearScore is the UK's #1 credit score and report app. We are also present in South Africa, Australia and Canada, with more than 20 million users globally and growing fast. Someone joins ClearScore every 20 seconds. We have established relationships with over 50 of the main lenders in the U.K., and have been a trusted tool for customers to manage their credit and make better financial decisions.

Since October 2016 we have helped 1.8 million users take out a new credit card or loan. We are user‑centric at our core and we believe in leveraging technology to enable positive financial choices. We are design‑led and data‑driven and we embed these behaviours in everything we do.

Our company culture is a fundamental part of all we have achieved. We believe in hiring smart, driven, passionate and diverse people who are keen on having a real impact in our organisation. We trust you to manage your own time so we offer flexible work and no fixed desk hours. We don't micromanage and we believe in measuring outcomes rather than effort. We have an inclusive culture where all, regardless of seniority, are encouraged to contribute with their ideas, look after their wellbeing and actively seek opportunities for career growth.

Our Hybrid Model

We embrace a dynamic hybrid work environment that balances flexibility with collaborative in‑person experiences. Our approach is designed to foster innovation, team connection, and individual productivity.

• Level 6 and above: Minimum 3 days per week in‑office

We believe this structure offers the best of both worlds – the flexibility of remote work and the synergy of face‑to‑face collaboration. Our office days are carefully coordinated to maximise team interactions and learning/ mentorship opportunities.

What This Means for You:

• Flexibility to manage your work and life
• Dedicated in‑office days for team building and collaborative projects
• Office facilities (with plants!) designed for productive interactions
• Clear expectations and support for maintaining our hybrid schedule

We’re committed to creating an inclusive environment that accommodates diverse needs while maintaining our collaborative culture. Join us in shaping the future of work!

Note: While we offer flexibility, commitment to our hybrid schedule is an important aspect of our team culture and performance expectations.

Inclusion Policy

We are always looking for talented individuals to join ClearScore. We are an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for our people. Please see our People Policy Notice at https://www.clearscore.com/people-notice.

ClearScore is committed to providing equal employment opportunities to all qualified individuals. As an equal opportunity employer, we are able to make reasonable adjustments to accommodate individuals with disabilities during the recruitment and selection process. If you require accommodation, please inform us in advance, and we will work with you to meet your needs.