Senior Backend Engineer

Senior Backend Engineer

Full-Time 60000 - 80000 £ / year (est.) Home office (partial)
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At a Glance

  • Tasks: Design and build scalable backend services for a cutting-edge analytics platform.
  • Company: Join a dynamic tech company focused on enhancing customer experience for top brands.
  • Benefits: Enjoy flexible working, competitive salary, equity options, and a generous holiday allowance.
  • Other info: Collaborative culture with excellent growth opportunities and a commitment to diversity.
  • Why this job: Make a real impact in the AI space while working with innovative technologies.
  • Qualifications: Strong backend engineering experience and proficiency in modern programming languages.

The predicted salary is between 60000 - 80000 £ per year.

Our mission is to help large successful brands like Uber, Amazon, Wise, HelloFresh (and more!) put their customers at the centre of everything they do. Using best-in-class tech in a fast-evolving AI space, our Customer Experience Intelligence platform continuously analyses explicit and implicit feedback to help our clients identify what to do next.

We're now looking for a talented Senior Backend Engineer to join the team!

What you'll be doing:
  • Designing, building and scaling the backend services and APIs that power Chattermill’s core analytics platform.
  • Owning and driving the delivery of high-impact engineering workstreams and integrating AI capabilities into the product experience.
  • Architecting reliable, maintainable distributed systems and contributing to the evolution of backend service design and infrastructure.
  • Owning end-to-end delivery of backend engineering workstreams, from technical scoping and architecture through to implementation, testing, observability, and production support.
  • Integrating language models, agentic frameworks, and AI pipelines into core product and backend services.
  • Driving performance, reliability, and observability across high-throughput distributed data systems, including logging, tracing, alerting, and incident response.
  • Working with cloud infrastructure and distributed systems in GCP (preferred) or AWS environments.
  • Collaborating closely with Product to define scope, shape technical solutions, and explore new platform capabilities and features.
  • Contributing to engineering excellence through code reviews, architectural discussions, and continuous improvement of development standards across the team.
What you’ll need:
  • Strong professional experience operating as a senior backend engineer within high-ownership product engineering teams.
  • Strong proficiency in at least one modern backend language such as Python, Ruby, or Go, with a focus on scalable system design and architectural thinking.
  • Solid understanding of distributed systems, RESTful APIs, and event-driven architectures.
  • Experience optimising database performance at scale, including query tuning, indexing, and partitioning across large production datasets.
  • Cloud platform experience, ideally within GCP environments, although AWS experience is also valued.
  • Hands-on experience with observability tooling and production operations, including logging, tracing, alerting, and incident response.
  • Proven ability to independently deliver backend features and technical projects in fast-paced product environments.
It would be a bonus if you:
  • Experience integrating LLMs, prompt engineering techniques, or agentic frameworks such as Anthropic, OpenAI, or MCP.
  • Familiarity with AI-assisted development workflows and tools such as Cursor, Copilot, or Claude Code.
  • Experience working with ClickHouse, BigQuery, or other analytical databases supporting large-scale analytical workloads.
  • Experience with customer feedback analytics, NLP, or text analytics platforms.
  • Familiarity with Elasticsearch or large-scale search infrastructure.
  • Experience building asynchronous or event-driven systems using technologies such as PubSub, Kafka, or equivalent.
  • Contributions to open-source projects, conference speaking, or public technical writing.
Our Hiring Process:
  • You’ll complete an introductory asynchronous interview.
  • You’ll meet with a member of our engineering team to complete a Live pseudo-code exercise.
  • You'll meet people you'll be working closely with from our Engineering team, and complete a System design and architecture-based interview.
  • You’ll have a call with Ugo Anomelechi, our VP of Engineering, to learn more about the role and show off your experience.
  • You’ll have a call with our cofounder to learn more about life at Chattermill and ensure we’re the right place for your next stage of growth.
Our Perks:
  • Flexible working in a choice-first environment.
  • Work-from-home allowance to set up your ideal workspace.
  • 25 days holiday + local bank holidays, plus an extra day for each year of service.
  • Your birthday off.
  • Annual learning & development budget to support your growth.
  • Equity options — share in the company’s success.
  • Monthly health & wellbeing budget, increasing with length of service.
  • Optional private healthcare plan.
  • Life assurance & income protection (location dependent).
  • Employee Assistance Programme (location dependent) for extra support when you need it.
  • Enhanced family leave (location dependent), plus fertility and neonatal leave.
Our Values:
  • We are obsessed with experience.
  • We believe in the power of trust.
  • We act as responsible owners.
  • We share a passion for growth & progress.
  • We set our ambitions high but stay humble.
  • We believe the right team is the key to success.

We want to enable exceptional experiences for everyone, and to achieve this we need everyone’s voice in our team. We are on a mission to bring more diversity into the business and to give everyone (from all backgrounds and abilities) a chance to join us.

Senior Backend Engineer employer: Chattermill Analytics Limited

Chattermill is an exceptional employer that prioritises flexibility and employee well-being, offering a choice-first work environment where you can thrive as a Senior Backend Engineer. With generous benefits including 25 days of holiday, an annual learning budget, and equity options, we foster a culture of growth and collaboration, ensuring that every team member has the opportunity to contribute to our mission of enhancing customer experience for leading brands. Join us in a dynamic, innovative setting that values trust, responsibility, and continuous improvement.

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Contact Details:

Chattermill Analytics Limited Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Backend Engineer

Tip Number 1

Network like a pro! Reach out to folks in your industry on LinkedIn or at tech meetups. A friendly chat can lead to opportunities that aren’t even advertised yet.

Tip Number 2

Show off your skills! Create a portfolio or GitHub repo showcasing your projects, especially those involving backend services and APIs. This gives potential employers a taste of what you can do.

Tip Number 3

Prepare for interviews by practicing coding challenges and system design questions. Use platforms like LeetCode or HackerRank to sharpen your skills and boost your confidence.

Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love hearing from passionate candidates like you!

We think you need these skills to ace Senior Backend Engineer

Backend Development
API Design and Development
Distributed Systems
Cloud Infrastructure (GCP, AWS)
Database Performance Optimisation
Observability Tooling
Technical Scoping and Architecture

Some tips for your application 🫡

Tailor Your Application:Make sure to customise your CV and cover letter for the Senior Backend Engineer role. Highlight your experience with backend languages like Python or Go, and showcase any relevant projects that demonstrate your skills in scalable system design.

Show Off Your Technical Skills:Don’t hold back on detailing your technical expertise! Mention your experience with distributed systems, RESTful APIs, and any cloud platforms you've worked with, especially GCP or AWS. We want to see how you can contribute to our tech stack!

Be Authentic:Let your personality shine through in your application. We value openness and trust, so share your ambitions and what excites you about working with us at Chattermill. This is your chance to connect with us beyond just your technical skills!

Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates during the hiring process. We can’t wait to hear from you!

How to prepare for a job interview at Chattermill Analytics Limited

Know Your Tech Stack

Make sure you’re well-versed in the backend languages mentioned in the job description, like Python, Ruby, or Go. Brush up on your knowledge of distributed systems and RESTful APIs, as these will likely come up during technical discussions.

Prepare for Live Coding

Since there’s a live pseudo-code exercise in the interview process, practice coding on the spot. Use platforms like LeetCode or HackerRank to simulate the experience and get comfortable with explaining your thought process as you code.

Understand the Company’s Mission

Familiarise yourself with Chattermill’s mission to enhance customer experience through AI. Be ready to discuss how your skills can contribute to this goal and share any relevant experiences that align with their values.

Ask Insightful Questions

Prepare thoughtful questions for your potential team and manager. This shows your interest in the role and helps you gauge if the company culture aligns with your career goals. Think about asking about their approach to integrating AI into their products or how they handle performance optimisation.