Lead .NET Engineer (Platform Architecture)

Prodigi Group; Cardiff; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading print-on-demand platform is seeking a Senior Technical Leader to shape the architecture of their core platform. The ideal candidate will have substantial experience in C#/.NET and distributed systems. Responsibilities include defining the product architecture, leading API design, and mentoring engineers. This fully remote position is open to applicants across the UK, with a preference for those based in South West and Wales. Enjoy a competitive salary, 25 days of holiday, and a dynamic working environment.

Benefits

Competitive salary

25 days holiday

Company pension scheme

Healthcare cash plan

Spec your own development machine

Charity day per year

Qualifications

• Deep experience designing distributed systems in .NET.
• Ability to define domain models and service boundaries.
• Expert-level knowledge in C# and .NET.

Responsibilities

• Define and evolve the architecture for a unified product platform.
• Lead the technical design of public APIs and internal services.
• Mentor engineers and set technical standards.

Skills

Architectural capability

Hands-on technical depth

Engineering leadership

C# programming

.NET framework

Cloud services (Azure preferred)

SQL and data modelling

Job description

Prodigi is the leading global print‑on‑Demand platform, enabling businesses to scale their operations through streamlined supply chains and maximised profits. Founded in 2014, we ranked 14th on the Sunday Times Virgin Atlantic Fast Track 100 list of the UK’s fastest‑growing companies.

With a worldwide network of over 50 production facilities across 10 countries, including our own production facilities, we support creators, enterprises and increasingly AI‑driven agents who expect a system that can take any image, turn it into any product, and fulfil it anywhere in the world.

About the role

We’re hiring a senior technical leader to shape the architecture of Prodigi’s core platform. You’ll work hands‑on in C#/.NET while defining the structures, service boundaries and system patterns that support our next‑generation product: an API‑first unified product creation, management and publishing engine.

Your work will directly influence how all merchants, integrations and AI agents interact with Prodigi. You’ll focus on correctness, robustness, data integrity and long‑term simplicity across systems that underpin millions of orders.

This is a role for someone who wants architectural responsibility, not just feature delivery.

What you’ll do

You’ll be shaping the foundations of a platform used by thousands of merchants and numerous integrations. Your work will influence our shipping engine, global routing logic, product creation pipelines, image processing, migration away from legacy stacks and the evolution of our public API.

This is an opportunity to define the technical blueprint for Prodigi’s next decade.

Drive platform architecture

• Define and evolve the architecture for our unified product and fulfilment platform.
• Lead the technical design of new versions of our public API: domain boundaries, event flows, versioning, service interactions.
• Shape internal service design: caching, messaging, error handling, consistency, observability.

Build core backend systems

• Design and implement backend services in C#/.NET that handle product modelling, shipping logic, routing and image/asset flows.
• Improve the robustness, clarity and consistency of core data models.

Enable the product vision

• Translate strategic goals into clear architectural direction for engineering.
• Work closely with Product to ensure designs scale across product creation, publishing and multi‑channel integrations.
• Mentor engineers and set technical standards for the wider team.

Improve quality and resilience

• Reduce complexity by refining and refactoring legacy components.
• Establish patterns that lower defects and operational overhead.
• Enhance logs, metrics, diagnosis and reliability across APIs and internal systems.

What we’re looking for

Strong architectural capability

• Deep experience designing and building distributed systems in .NET.
• Ability to define domain models and service boundaries for complex transactional platforms.
• Experience modernising or consolidating systems into clean, long‑lived architectures.
• Strong grasp of eventing, queues, async flows and API design.

Hands‑on technical depth

• Expert‑level C# and .NET.
• Strong understanding of cloud services (Azure preferred).
• Solid SQL and data modelling.
• Comfortable building, testing and operating production services.

Engineering leadership

• Ability to set direction and provide technical mentorship.
• Confidence to challenge assumptions and propose simpler architectures.
• Ownership mindset in complex environments.

Nice to have

• Experience in e‑commerce, fulfilment, logistics or multi‑tenant platforms.
• Experience building image‑driven or asset‑driven products.
• Familiarity with event‑sourcing, DDD or service‑oriented design.
• Interest in generative‑AI driven commerce integrations.

What we offer

• Competitive salary (dependent on experience).
• 25 days holiday per year, plus one additional day off for your birthday.
• Company pension scheme (4% employer contribution, 5% employee contribution).
• Healthcare cash plan.
• Spec your own development machine.
• A charity day per year to volunteer at a recognised charity.
• The opportunity to work in a dynamic and fast‑growing business at the forefront of the print‑on‑Demand industry.

Location

This role is fully remote, with the team distributed across the UK and three international timezones. However we do have an engineering hub based in Cardiff and so South West and Wales would be preferred.