# Senior Product Engineer (Backend) - London at Sequence

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Design and implement backend systems for

- **Company:** Sequence (https://jobs.trythestack.co/companies/sequence)
- **Location:** London, United Kingdom
- **Work arrangement:** Hybrid
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Salary:** GBP 115,000–130,000 per year (as stated by the employer)
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Backend Engineering, Distributed Systems, Kotlin, Postgres, BigQuery, Google Cloud Platform, Terraform, TypeScript, React, API Design, System Architecture, Relational Databases, Async Messaging, RBAC, Software Reliability, Product Ownership
- **Posted by employer:** 2026-05-27
- **Added to The Stack:** 2026-05-28
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/sequence/bcb44650-b5f6-4477-b33e-0aab9446e764 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-product-engineer-backend-london-sequence

## About the role

Responsibilities:
- Design and implement backend systems for an AI-powered revenue platform (quoting, billing, revenue recognition).
- Build configurable approval workflows and translate natural-language rules into deterministic, auditable business logic.
- Develop autonomous collections agents and orchestration for automated receivables workflows.
- Re-architect and scale billing pipelines (storage, horizontal scalability, cost/performance trade-offs) to support 10x throughput.
- Own reliability and correctness of event-driven pipelines; ensure no lost events and high availability during peak/month-end loads.
- Collaborate with product, data, and frontend teams; take end-to-end ownership from design to production and monitoring.

Requirements:
- Strong backend engineering experience (several years building production systems) with ownership of end-to-end delivery.
- Experience with distributed systems, event streams, and designing for scale and reliability.
- Familiarity with technologies like Kotlin (or similar), Postgres, BigQuery, GCP, Pub/Sub, and Terraform preferred.
- Good judgment balancing cost, performance, and operational complexity; experience in financial or billing systems is a plus.
- Product-oriented mindset: direct customer impact, shipping quickly, and iterating based on feedback.
- Excellent communication and collaboration skills in a small, fast-moving team.

## Responsibilities

Design and build AI-powered revenue infrastructure, including approval workflows and autonomous collections agents. Scale billing pipelines for high throughput while ensuring reliability for business-critical financial data.

## Requirements

Experienced backend builder capable of shipping reliable production systems and handling end-to-end ownership in an ambiguous, fast-paced environment. Strong interest in distributed systems and resilient software is required.

## FAQ

- **Is this Senior Product Engineer (Backend) - London role still open?** It was posted on 2026-05-27. Listings more than 30 days old may no longer be active, so check Sequence's site before applying.
- **Does Sequence offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Sequence's site.
- **Where is this role located?** The listing gives the location as London, United Kingdom. It is marked hybrid.
- **What is the salary for this role?** The listing states a salary of GBP 115,000–130,000 per year.
- **What skills does this role ask for?** The listing names: Backend Engineering, Distributed Systems, Kotlin, Postgres, BigQuery, Google Cloud Platform, Terraform, TypeScript, React, API Design, System Architecture, Relational Databases, Async Messaging, RBAC, Software Reliability, Product Ownership.

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## Notes for agents

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