At a Glance
- Tasks: Lead the design and delivery of high-performance Go microservices on AWS.
- Company: Join infact, a pioneering fintech startup transforming credit data in the UK.
- Benefits: Competitive salary, equity options, and the chance to shape a groundbreaking product.
- Other info: Enjoy autonomy and mentorship opportunities in a dynamic startup environment.
- Why this job: Be part of a small team making a huge impact in the fintech space.
- Qualifications: 5+ years in B2B API services with expertise in Go and AWS.
The predicted salary is between 85000 - 120000 £ per year.
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.
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
What makes this role 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.
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.
Senior Product Engineer (£85k–£120k + Equity) at infact in London employer: Jack & Jill
At infact, we pride ourselves on being an exceptional employer, offering a unique opportunity to shape the future of fintech in London. Our collaborative work culture fosters innovation and personal growth, with direct access to leadership and a focus on mentorship for engineers. With competitive salaries, equity options, and the chance to build groundbreaking technology from the ground up, we provide a rewarding environment for those looking to make a significant impact in their careers.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Product Engineer (£85k–£120k + Equity) at infact in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Jack & Jill or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Jack & Jill.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Jack & Jill.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Jack & Jill that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Product Engineer (£85k–£120k + Equity) at infact in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Jack & Jill.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Jack & Jill and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Jack & Jill
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Jack & Jill uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
