Integration Technical Lead – .NET, C# & Azure

ARCA Consulting Ltd; City Of London; On-site; GBP 90,000 - 120,000; Full time

Job summary

ARCA Consulting Ltd is partnering with a leading UK ecommerce business to hire an Integration Technical Lead with hands-on .NET, C# and Azure expertise. This role blends hands-on delivery with technical leadership across Engineering, Product and Architecture to build scalable, secure integration services.

You will own the technical roadmap for integration platforms, provide leadership across C#/.NET and Azure, design APIs and event-driven solutions, and mentor engineers while ensuring delivery

Qualifications

• Strong hands-on experience with C# and .NET (Core/6+), building integration services and APIs.
• Proven experience with Microsoft Azure and cloud-native architectures.
• Experience delivering integration solutions, REST APIs, microservices and event-driven systems.
• Understanding of cloud-native scalability and performance optimization.
• Experience with DevOps, CI/CD and Infrastructure as Code (ARM, Bicep, Terraform).
• Mentoring engineers and helping teams improve effectiveness.

Responsibilities

• Own and shape the technical roadmap for integration services.
• Provide hands-on technical leadership across C#/.NET and Azure.
• Design and deliver robust integration solutions including APIs, messaging and distributed systems.
• Work with Engineering Manager and Integration Architect on delivery and priorities.
• Mentor engineers and support their technical development.
• Promote high engineering standards through reviews and documentation.
• Identify and manage technical debt across integration platforms.

Skills

C# and .NET

Microsoft Azure

REST APIs

Microservices

Event-driven architectures

Cloud-native architecture

DevOps / CI-CD

Infrastructure as Code (ARM/Bicep/Terf

Mentoring engineers

Tools

ARM

Bicep

Terraform

Job description

Integration Technical Lead - .NET, C# & Azure

Location: London

Working Pattern: HYBRID - 2 days per week onsite

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

Ecommerce or retail 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

• 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

• 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.