Senior .NET Engineer

Synergy Solutions Limited; City of London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading technology consultancy in the City of London is seeking an experienced Senior .NET Engineer to design and develop scalable software for mission-critical systems. You will mentor junior developers, drive architectural decisions, and collaborate with product and DevOps teams while using the latest .NET technologies. Ideal candidates should have strong experience in ASP.NET Core and a passion for writing clean, maintainable code. Competitive compensation is provided.

Qualifications

• Proven experience in developing high-performance applications.
• Mentoring junior developers and driving architectural decisions.
• Passionate about writing clean, maintainable code.

Responsibilities

• Design and develop scalable software for mission-critical systems.
• Collaborate closely with product and DevOps teams.
• Lead innovation using the latest .NET technologies.

Skills

Hands-on experience with C# and .NET

Experience within the public sector

Strong experience with ASP.NET Core

Solid understanding of Entity Framework

Proficiency with Azure cloud services

Deep knowledge of software architecture patterns

Familiarity with CI/CD pipelines

Comfortable with unit testing frameworks

Experience with message brokers

Strong communication skills

Job description

Are you ready to build scalable software that powers mission‑critical systems? Want to lead innovation using the latest in .NET technologies?

Role Overview

We’re looking for a Senior .NET Engineer to join our fast‑growing team within the public sector. You’ll play a key role in designing, developing, and deploying high‑performance applications that scale globally. As a senior team member, you'll mentor junior developers, drive architectural decisions, and collaborate closely with product and DevOps teams to build robust, secure, and scalable systems.

Technical Requirements ✔️

• Hands‑on experience with C# and .NET (Core & Framework)
• Experience within the public sector
• Strong experience with ASP.NET Core for building RESTful APIs
• Solid understanding of Entity Framework / EF Core and relational databases (e.g., SQL Server, PostgreSQL)
• Proficiency with Azure cloud services (App Services, Functions, Key Vault, etc.)
• Deep knowledge of software architecture patterns (e.g., DDD, Microservices, CQRS)
• Familiarity with CI/CD pipelines and version control (Git)
• Comfortable with unit testing and integration testing frameworks (xUnit, MSTest, Moq)
• Experience with message brokers like RabbitMQ, Kafka, or Azure Service Bus is a plus
• Passion for writing clean, maintainable, and testable code
• Strong communication and leadership skills

About us 🔓

esynergy is a technology consultancy and we build products, platforms and services to accelerate value for our clients.

We drive measurable impact that is tightly aligned to our clients’ business objectives. Put in practice that means high transparency, metric‑driven reporting, and incremental handovers and a consistent focus on building our clients’ capability.

Our delivery teams are small and highly functional, formed by a vetted ecosystem of associates, luminaries and partners. We choose technologies that are the right fit for our clients’ needs and are not opinionated around specific tech stacks and service offerings.