Senior Software Engineer

Focused Futures Consultancy LTD; United Kingdom; On-site; GBP 60,000 - 80,000; Full time

Benefits offered by this job

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25 days annual leave

Exposure to Power BI

Job summary

A leading fintech organization is seeking a Senior .NET Developer to develop and maintain applications for high-volume payment processing. In this role, you will design secure backend architectures and improve operational processes within a collaborative Agile team. Ideal candidates will exhibit strong expertise in C# / .NET Core, and have experience in financial services. The position offers hybrid working arrangements with opportunities for professional growth in a rapidly scaling global fintech platform.

Qualifications

• Strong C# / .NET Core (9/10) expertise required.
• Proven background in high-volume payment systems necessary.
• Experience in organizations compliant with SOC 2 or ISO 27001.

Responsibilities

• Develop and maintain .NET Core applications for payment processing.
• Design secure backend architectures for financial systems.
• Contribute to BAU and operational tickets.

Skills

C# / .NET Core expertise

Agile/Kanban experience

Designing secure, scalable backend platforms

Experience with high-volume payment systems

Angular

F#

Tools

Azure SQL

Power BI

Job description

Location: Hybrid – 1–2 days per month in London

Team: Core UK Project Team – Agile/Kanban

Overview

We are supporting an innovative fintech organisation building a secure, high-volume, real‑time payment platform used across the UK, USA, Australia, and other global markets.

This is a hands‑on Senior .NET Developer role within the core engineering team. The environment is ideal for practical, delivery‑focused engineers who enjoy writing clean code, designing scalable distributed systems, and solving complex operational challenges within regulated financial services environments.

You’ll be working on mission‑critical payment infrastructure where performance, security, resilience, and accuracy truly matter.

The engineering team is made up of experienced professionals who have previously worked for a number of award‑winning Microsoft Advanced Specialised Partners. This provides a unique opportunity to collaborate and work in synergy with a world‑class team that values technical excellence, continuous improvement, and robust engineering standards.

Key Responsibilities

• Develop and maintain .NET Core 9/10 applications supporting real‑time payment processing
• Design scalable, secure backend architectures for API‑driven financial systems
• Build and integrate systems supporting money transfers, savings functionality, and Mastercard integration
• Work within Azure services ecosystem (primarily Azure SQL; minimal Cosmos DB)
• Automate and improve operational processes to reduce third‑line support overhead
• Contribute to BAU and operational tickets (~15% of role)
• Operate within a Kanban‑based Agile framework (continuous delivery, no rigid sprints)

Required Experience

• Strong C# / .NET Core (9/10) expertise
• Proven background in high‑volume, real‑time payment, banking, or financial services systems
• Experience designing secure, scalable backend platforms
• Experience working in organisations that comply to SOC 2 or ISO 27001 accreditation, with an understanding of delivering solutions that meet regulatory and security standards
• Agile/Kanban experience with continuous delivery mindset
• Angular
• F#

What’s on Offer

• Hybrid working (1–2 days per month in London; team meet‑ups with travel covered)
• Share options
• 25 days annual leave
• Exposure to Power BI and broader data tooling
• Opportunity to contribute to a rapidly scaling global fintech platform

Diversity, Equity & Inclusion

We are committed to fostering an inclusive and equitable workplace where diverse perspectives are valued. We actively encourage applications from individuals of all backgrounds and are dedicated to ensuring a fair and inclusive recruitment process.

Additional Requirement:

Candidates must be UK-based. Company sponsorship is not available for this one️