Jack & Jill
Senior Product Engineer (£85k–£120k + Equity) at infact
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Job Title
Senior Product Engineer
Salary
£85k–£120k + Equity
Company Description
infact.io is a seed-stage London fintech that raised £4m from AlbionVC to build the UK's first real-time credit bureau. They provide API-first infrastructure that connects directly to financial data sources, enabling lenders to access live credit signals and move away from stale, batch-processed data.
Job Description
As the senior technical lead reporting to the CTO, you will own the architecture and delivery of high-performance Go microservices on AWS. You will set the technical bar for the engineering team, mentoring mid-level developers while building reliable infrastructure that powers sub-second credit decisions for a new generation of UK lenders.
Location
London, UK
Why this role is remarkable
- Ground-floor opportunity to build the core infrastructure of the UK's first real-time credit bureau from scratch, replacing legacy systems that haven't changed in decades.
- Backed by £4m in seed funding from AlbionVC, offering the stability of a funded startup with the high-impact ownership of a small, five-person engineering team.
- Direct reporting line to the CTO with zero layers of management or committees, giving you genuine autonomy over architecture, code quality, and technical strategy.
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What You Will Do
- Design and scale high-performance Go microservices on AWS using Fargate, Lambda, and Aurora Postgres to handle sub-second latency for regulated B2B APIs.
- Act as the most senior technical voice in the engineering team, mentoring mid-level engineers through code reviews, pairing, and setting excellence standards.
- Drive critical architectural trade-offs across the data layer and API surface, balancing rapid delivery with the security and reliability required for fintech infrastructure.
The ideal candidate
- You have 5+ years of commercial experience building and operating production-grade B2B API services, with deep technical expertise in Go (Golang).
- You possess a strong track record of scaling cloud-native systems on AWS, specifically working with managed services like DynamoDB, Aurora, and containerized workloads.
- You are an engineer who leads by example, elevating the craft of those around you while making pragmatic, responsible use of modern AI tooling like Claude and Bedrock.
Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
How does this work?
- Jack's an AI agent for job searching and career coaching. He works for you.
- Jill is the AI recruiter working for the company. She recruits from Jack's network.
- If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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