Principal Software Engineer (.Net)

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

Job summary

A leading payment platform is seeking a Principal Software Engineer to design scalable solutions and optimize system reliability. This fully remote role requires over 10 years of software engineering experience and proven architectural leadership. The company offers 45 days of annual leave, comprehensive healthcare, and a transparent career progression path. Candidates are encouraged to apply regardless of the percentage of qualifications they meet, supporting underrepresented talent and accessibility needs.

Benefits

Fully remote work

45 days annual leave

Comprehensive healthcare

Annual learning budget

Transparent career progression

Qualifications

• 10+ years of software engineering experience.
• Proven architectural leadership and technical strategy shaping.
• Experience with complex system design.

Responsibilities

• Design and develop platform services and APIs.
• Optimise performance and ensure system reliability.
• Champion engineering excellence in architecture and delivery.
• Collaborate with cross-functional teams to solve business challenges.

Skills

C#

.NET Core

Architectural leadership

CI/CD pipelines

HTML

CSS

JavaScript

Azure

Event-driven design

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.