Principal Software Engineer .Net

Primis; Remote; GBP 90,000 - 110,000; Full time

Job summary

A dynamic global payment platform is hiring a Principal Software Engineer .NET to design and develop critical systems and APIs. The role demands strong architectural leadership with over 10 years of experience. You will contribute to performance optimization and work with cross-functional teams. Enjoy the benefits of fully remote work across the UK, 45 days of annual leave, and comprehensive private healthcare. The company fosters an inclusive culture and encourages all qualified candidates to apply regardless of their match with the job description.

Benefits

45 days annual leave plus bank holidays

Comprehensive private healthcare

Annual learning budget for courses and certifications

Transparent career progression

Qualifications

• 10+ years of software engineering experience with proven architectural leadership.
• Strong ability to navigate complex system design confidently.
• Experience with modern agile methodologies.

Responsibilities

• Design and develop mission-critical platform services, APIs, and merchant portals.
• Drive performance optimisation and system reliability.
• Champion engineering excellence in architecture and code quality.

Skills

C#

.NET Core

Event-driven architecture

Microservices design

Azure

DevOps practices

Tools

SQL

RabbitMQ

HTML

CSS

JavaScript

Job description

Principal Software Engineer .NET

£90,000-£110,000

Remote (UK)

Do you thrive on building scalable solutions that power commerce worldwide?

We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant‑centric ecosystem built on quality, resilience, and scale - and they need exceptional .NET Software Engineers to drive this evolution.

Your Impact

• Design and develop mission‑critical platform services, APIs, and merchant portals
• Drive performance optimisation and system reliability through intelligent engineering
• Champion engineering excellence in architecture, code quality, and delivery
• Partner with cross‑functional teams to deliver solutions that solve genuine business challenges

Tech Stack

• Core: C#, .NET Core
• Architecture: Event‑driven, microservices‑oriented design
• Cloud: Azure (AWS experience valued), Infrastructure‑as‑Code
• Data: SQL, caching strategies, message brokers (RabbitMQ, etc.)
• Frontend: HTML, CSS, JavaScript
• DevOps: CI/CD pipelines, Behaviour‑Driven Development, modern agile methodologies

What You Bring

• 10+ years of software engineering with proven architectural leadership - you shape technical strategy and navigate complex system design with confidence

What's In It For You

• Fully remote across the UK & Ireland
• 45 days annual leave plus bank holidays
• Comprehensive private healthcare for you and your family
• Annual learning budget for courses and certifications
• Transparent career progression

*Please note that this opportunity does not support visa sponsorship

Research indicates that men will apply to a role when they only meet 50‑60% of the descriptions, however, when looking at women and other minority groups, they can look for up to a 99% match in order to apply to a role. If you feel you are a fit for our role, please still apply, don’t worry if you don’t tick every single box. We’d still love to hear from you. We encourage underrepresented talent to apply to all our roles & support accessibility needs.