Principal Software Engineer

TopTek Talent; Remote; GBP 140,000; Full time

Job summary

A prominent FinTech company is seeking a Principal Software Architect to lead technical governance and product evolution in a remote setting. The role focuses on driving engineering excellence, fostering documentation practices and mentoring senior engineers. Candidates should possess extensive experience in back-end development with Java or Kotlin, and a proven background in AWS cloud architecture. Additionally, familiarity with automated testing and modern JavaScript frameworks is essential. The position offers a competitive salary of £140,000 plus equity, along with numerous benefits.

Benefits

Equity

25 days leave plus bank holidays

Private GP

Life Assurance

Qualifications

• Proven track record in a Senior Staff, Principal, or Architect role.
• Experience in back-end development with JVM.
• Solid knowledge of cloud-native architectures on AWS.

Responsibilities

• Act as technical authority ensuring scalable and resilient systems.
• Design developer-friendly APIs and domain models.
• Mentor engineers and drive adoption of solutions.

Skills

Leadership in engineering

Java or Kotlin expertise

JavaScript frameworks

AWS architecture

Automated testing

Tools

Postgres

MongoDB

Job description

h3>🛡️ Principal Software Architect (FinTech SaaS) – UK Remote 💻

We are representing a scaling B2B FinTech that provides core decisioning infrastructure for the global financial services sector.

Their enterprise SaaS technology enables major lenders to modernise their credit assessment processes, allowing for more efficient deployment of capital to the commercial sector. By integrating sophisticated data layers into traditional banking workflows, they are significantly improving how credit is optimised and distributed to businesses.

We are looking for a heavyweight Principal Engineer to serve as the ultimate technical authority and strategic advisor across multiple product squads.

Location

Remote-friendly (UK). The team values flexibility, with an expectation to attend high-level strategy meetings or client sessions in London a few times a month.

Salary & Package

£140,000 + Equity , 25 days leave (plus Bank Holidays), 4x Life Assurance, Private GP, and a comprehensive rewards scheme.

❓ Is this your next challenge?

• Are you a product-obsessed engineer? We need someone who doesn't just build to spec, but obsessively focuses on the customer and identifies the right problems to solve to deliver maximum commercial impact.
• Do you excel at cutting through ambiguity? You should enjoy transforming vague product needs into flexible, extensible architectural solutions that solve real-world industry problems.
• Are you a veteran developer who still loves being "hands-on"? This role requires a technical leader who stays close to the code while guiding high-level strategy and acting as a primary mentor for senior engineers.

The Opportunity 🎯

This is a high-visibility leadership role. You won't just be managing a team; you’ll be fostering a culture of "intellectual curiosity" and engineering excellence across several multidisciplinary squads. You will be the bridge between complex product needs and robust, scalable reality—helping the business "make it work, then make it beautiful."

What You’ll Be Driving 🛠️

• Technical Governance : Acting as the trusted authority on architecture, ensuring systems are flexible, scalable, and resilient.
• Platform Evolution : Leading the design of robust functionality, including developer-friendly APIs, intricate domain modeling, and data integrations.
• Strategic Problem Solving : Identifying cross-cutting technical hurdles and driving the adoption of solutions across the entire engineering organisation.
• High-Bar Mentorship : Setting the gold standard for collaboration, from technical coaching to providing exceptionally clear documentation and code reviews.
• Product Collaboration : Working alongside Product Managers to turn business goals into elite-level software.

Your Experience & Expertise ✨

• Consistent Senior Leadership : You have a proven track record of continuous experience in a Senior Staff, Principal or Architect capacity.
• Back-End Mastery : Extensive professional background working with the JVM ecosystem (specifically Java or Kotlin).
• Modern Web & Orchestration : Ideally you will have proficiency in JavaScript frameworks and experience with workflow engines.
• Cloud-Native Data : Solid experience architecting on AWS and managing both relational and document-based data stores like Postgres and MongoDB.
• Delivery Standards : You are a champion of automated testing and deployment pipelines, with deep expertise in TDD and CI / CD workflows.
• Complex Domains : Ideally, you have navigated the world of SaaS within regulated environments, understanding the nuances of data protection and multi-tenant security.

➡️ If you are a product-focused technical leader ready to own the strategy of a disruptive FinTech platform, apply now!

Applicants must have the right to work in the UK as visa sponsorship is not available at this time.