Senior Backend Software Engineer

Company: Zepz
Apply for the Senior Backend Software Engineer
Location: Greater London
Job Description:

About the role

We are seeking a highly capable Senior Backend Software Engineer to join our Reconciliation Engineering team in the UK, specializing in data models and process automation. This role demands the ability to quickly grasp data models and queries, delivering solutions under tight deadlines, and handling pressure during incident response and audit assistance. A core responsibility is investigating and fixing the root causes of data discrepancies and mismatches between microservice systems, which ensures accuracy for regulators and auditors. You will collaborate closely with the Finance Reconciliation and Data Operations teams to automate critical manual processes, including report generation and partner statement injection/processing. A key upcoming project involves automating the complex tiered commissions system for our payout partners. Essential skills include proficiency in SQL and DAG, with a strong preference for candidates who have previous experience in fintech or financial institutions handling reconciliation and real‑time transaction data.

What you will own

  • Write great code: We understand code is read more than it’s written, better off tested and maintainability is a must.
  • Help shape what we build: You’ll be working closely with product owners, designers and other engineers to design and refine our work. We work as a team and your input is key.
  • Influence technology evolution: We are designing new platforms with long‑term goals in mind and are also happy to improve with new technology capabilities.
  • Own delivery: We’re obsessed with shipping value; you’ll own work beyond a pull request. You’ll care about bugs, scalability, uptime and other non‑functional requirements.
  • Grow together: You’ll review others’ work and happily seek feedback on yours to ensure we build a better codebase and sharpen each other’s skills.
  • Share your knowledge and points of view: We promote knowledge sharing across our teams and count on you to become an active member of one. Experiment with new tools, present your findings, shape our future standards.
  • Scope and Impact: You invent and try to simplify what we do. You insist on the highest standards from your team and yourself. You have charisma. You lead or influence a team. You tackle open‑ended somewhat ambiguous problems.

What you bring to the table

  • Strong experience in building backend services/APIs. This role specifically is for an engineer with solid experience with Python backend services. A large part of the codebase you will be working on is currently in Python.
  • Strong experience in handling large volume of data and writing ETL processes, transforming data from multiple different sources using languages/tools such as SQL, Apache Airflow, DBT, Databricks.
  • Experience working in Java or open to learn as some of our services are in Java.
  • Solid experience with system design and architecture.
  • Experience with unit and integration tests.
  • You are a system design enthusiast and have experience designing and transforming existing systems collaboratively to make them scalable, maintainable and reliable.
  • You have a true DevOps mindset and are able to support your team towards becoming true owners of their product/platform.
  • You work well with Engineering and Product members and are comfortable building effective relationships with stakeholders outside technology.
  • An open mind with respect to diversity and inclusivity. Our team (and customers) come from all over the world.

Bonus Points if you

  • Worked at a scale startup previously.

If you want to join us in our journey to help break barriers in financial access and improve lives globally, there’s no better place or time to join.

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Posted: April 17th, 2026