Senior Full-Stack Engineer – Investment Systems

Fynetra; United Kingdom; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A financial technology firm in the United Kingdom is looking for a Senior Engineer to join their core investment technology group. The role involves building scalable systems for investment processes, focusing on automation and performance. Candidates should have significant experience with software systems, preferably in Python, and demonstrate proficiency in cloud technology. The firm values communication and collaboration, offering a hybrid work setting with true ownership of impactful projects.

Qualifications

• Senior-level experience in full-stack or backend engineering.
• Deep understanding of cloud infrastructure and data processing.

Responsibilities

• Design and build features for investment platforms.
• Automate investment and operational workflows.
• Improve system performance and reliability.
• Modernize legacy systems into cloud-native architectures.
• Lead projects and mentor team members.

Skills

Building complex software systems

Strong proficiency in Python

Cloud platforms experience

Understanding of databases

Designing scalable solutions

Effective communication

Job description

technology, Quantitative

Perm

Hybrid

The Role

This is a senior engineering role within a core investment technology group responsible for building the systems that underpin a large-scale, systematic investment process.

You’ll work on mission-critical platforms that support research, trading, and portfolio operations across a global investment footprint. The focus is on automation, scalability, and resilience — building systems that can handle complex data flows, large universes, and tight operational windows.

This role combines hands-on development with technical leadership. You’ll influence architecture, mentor engineers, and take ownership of systems that matter.

What You’ll Be Working On

• Designing and building features across core investment platforms
• Automating complex investment and operational workflows
• Improving system performance, reliability, and scalability
• Modernising legacy systems into cloud-native architectures
• Building and supporting data-heavy, production-grade applications
• Leading projects and mentoring engineers across the team
• Supporting production issues with a strong sense of urgency

What They’re Looking For

• Senior-level experience building complex software systems
• Strong proficiency in Python or another object-oriented language
• Deep experience with cloud platforms and modern infrastructure
• Strong understanding of databases, data processing, and analytics tooling
• Proven ability to design and deliver scalable, resilient solutions
• Comfortable owning systems end-to-end in a production environment
• Clear communicator who works well across engineering and business teams

Experience in asset management or financial services is helpful, but not essential.

Background

• Significant professional experience in full-stack or backend engineering
• Track record of modernising systems and improving platform quality
• Strong debugging, testing, and delivery discipline

Why This Role

• Core systems with real business impact
• Influence over architecture and technical direction
• High-trust environment with meaningful ownership
• Hybrid working with a mature, collaborative culture

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