Integration Technical Lead – .NET, C# & Azure

ARCA; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

ARCA Consulting is partnering with a leading UK ecommerce business to hire an Integration Technical Lead. The role focuses on owning the integration services roadmap, hands-on C#/.NET and Azure leadership, and delivering robust API-driven, event-driven solutions.

You’ll lead across Engineering, Product and Architecture, shaping technical direction, driving quality, and mentoring a team to deliver scalable, resilient cloud-native integrations.

Qualifications

• Strong hands-on experience with C#/.NET (Core/6+), building integration services and APIs.
• Proven experience with Microsoft Azure.
• Experience designing and delivering integration solutions and distributed syste ms, including REST APIs, microservices and event-driven architectures.

Responsibilities

• Owning and shaping the technical roadmap for integration services, aligned with Engineering and Architecture strategy.
• Providing hands-on technical leadership across C#/.NET and Microsoft Azure.
• Designing and delivering robust integration solutions, including APIs, messaging, event-driven architectures and distributed systems.
• Making pragmatic architectural and technical decisions within established guardrails.
• Collaborating with Engineering Manager and Integration Architect on delivery and prioritisation.
• Mentoring engineers and supporting their technical development in integration concepts and best practices.

Skills

C#/.NET

Azure

APIs

Distributed systems

DevOps

CI/CD

Mentoring

REST

Tools

ARM/Bicep

Terraform

Job description

Location: London

Location: London or Dorset

ARCA Consulting is proud to be partnering with a leading UK ecommerce business that is continuing to evolve its technology landscape and is looking for an experienced Integration Technical Lead with hands on .Net, C# expertise to play a key role in shaping its integration capability.

This is an exciting opportunity to join a high-profile, digitally driven organisation and combine hands-on technical expertise with technical leadership, working across Engineering, Product and Architecture to build scalable, secure and resilient integration services.

You’ll have genuine influence over technical direction, architecture and delivery, while remaining close to the technology and supporting a talented engineering team.

Ecommerce, retail or similar experience would be advantageous, but it isn’t essential. We’re interested in candidates who have worked in complex, high-volume or customer-focused technology environments where reliability, scalability and integration are critical.

What you’ll be doing

As Integration Technical Lead, you’ll provide technical leadership within an integration-focused product team, helping shape the technical direction while enabling the team to deliver at pace.

Your responsibilities will include:

• Owning and shaping the technical roadmap for integration services, aligned with wider Engineering and Architecture strategy.
• Providing hands-on technical leadership across C#/.NET and Microsoft Azure.
• Designing and delivering robust integration solutions, including APIs, messaging, event-driven architectures and distributed systems.
• Making pragmatic architectural and technical decisions within established architectural guardrails.
• Working closely with the Engineering Manager and Integration Architect on delivery, prioritisation and ways of working.
• Helping the team understand technical complexity, estimate effort and plan effectively.
• Removing technical blockers that could impact delivery.
• Proactively identifying and managing technical debt across integration platforms.
• Designing scalable and resilient cloud-native solutions using Azure services
• Promoting high engineering standards through coding standards, code reviews, modular design and effective documentation.
• Mentoring engineers and supporting their technical development, particularly around integration concepts and best practice.
• Working collaboratively across Product, Engineering and Architecture to help build a high-performing team.

What we’re looking for

We’re looking for someone who combines strong technical depth with excellent communication, leadership and problem-solving skills.

You’ll ideally have:

• Strong hands-on experience with C# and .NET (Core/6+), particularly building integration services and APIs.
• Proven experience working with Microsoft Azure
• Experience designing and delivering integration solutions and distributed systems, including REST APIs, microservices and event-driven architectures.
• A strong understanding of cloud-native architecture, scalability and performance optimisation.
• Experience with DevOps, CI/CD and Infrastructure as Code, with ARM, Bicep or Terraform being advantageous.
• A genuine interest in mentoring engineers and helping teams become more effective.