9fin · Finance

Senior II Product Engineer

  • London (Hybrid)
  • Full-time
  • Competitive

AI roleAI-NativeUses AI tools

Still open on 9fin's site · checked just now

Level
Senior
Posted

What you'll do

As written by 9fin · Read the original

  • Own the design and delivery of significant backend systems and services across a product domain, from data modelling through API surface to operational concerns.

  • Lead complex, multi sprint engineering initiatives that span several engineers and stakeholders.

  • Drive scaling work: identify bottlenecks, propose architectural changes, and execute migrations safely in production.

  • Make pragmatic decisions about distributed systems concerns including consistency, idempotency, partitioning, retries, and observability.

  • Contribute to platform level discussions on service boundaries, data ownership, and how systems evolve as we enter new markets.

  • Run thorough code reviews, mentor senior and mid level engineers, and help define what good looks like in the codebase.

  • Partner with cross functional teammates from Product, Data Engineering, and our editorial and legal domain experts to scope work and ship the right thing.

  • Improve developer experience by investing in tooling, testing, observability, and the paved road so the whole team moves faster.

  • Ramp on legacy areas of the system, find the highest leverage cleanup, and execute it without stalling delivery.

  • Use AI assisted engineering to move faster on understanding, prototyping, and shipping code.

Requirements

You will be a great fit if you have

  • Several years operating as a senior backend engineer, with a clear track record of leading technical initiatives end to end across a product domain.

  • Experience contributing to the design of distributed systems in production, including the operational realities such as failure modes, observability, data consistency, and graceful degradation.

  • A track record of solving scaling problems, whether database scaling, throughput, latency, or cost. You can talk through a real example end to end: how you measured the problem, what you changed, and what the outcome was.

  • Experience designing and operating event driven architectures in production, including message queues or streaming systems, with a clear understanding of delivery guarantees, idempotency, and failure handling.

  • Strong design skills around APIs, service boundaries, and the flow of data from persistent storage through to clients.

  • Strong Python experience, including modern web frameworks (we use FastAPI with Pydantic and strong typing).

  • Deep working knowledge of SQL and relational data modelling.

  • Excellent collaboration and communication, including the ability to explain complex systems and tradeoffs to non technical stakeholders.

  • A strong product and customer mindset, with the judgement to balance shipping value against long term system health.

  • A high bar for code quality, testability, and operational maturity, and the habit of raising that bar through review and mentorship.

Nice to have

  • Experience working on complex permissioning or access control systems (multi tenant, role or attribute based, fine grained, audit driven, or similar).

  • Experience with end to end document management systems, especially solving problems of scale and applying strong security practices such as encryption, access control, data lineage, and retention.

  • Experience modernising legacy systems and migrating workloads with minimal downtime.

  • Experience with a data pipeline orchestrator.

  • Experience working at AI startups, including integrating with and building on top of AI and LLM based solutions.

Skills

Stack

  • Python
  • FastAPI
  • Flask
  • SQL
  • AWS
  • Docker

Working languages

English

Salary & benefits

Company Benefits

We’re a scaling start up and we enjoy sharing our success, when the company succeeds, we always reinvest that in our people. We also offer huge amounts of responsibility, an abundance of opportunity for growth and a platform to truly excel.

Company

Last checked . The details above were extracted automatically; the employer's original posting is the authority.

Correct or remove this listing

Similar jobs