Senior Software Engineer (.NET & Azure)

Rapid Circle; Amsterdam; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Competitive salary based on experience

Allianz pension scheme

€50 net representation allowance per 


€25 vitality budget per month

Lease car or mobility arrangement

Laptop and phone

Hybrid working from home and offices

Training, certifications, knowledge &

Access to GitHub Copilot and tooling

Job summary

Rapid Circle is seeking a senior software engineer who can bridge development, design and architecture to deliver Azure-based solutions across industries. You will translate questions into designs, build with .NET, APIs and frontend tech, and guide engineers and customers through trade-offs.

You will review agented outputs, explain choices, and help shape reusable practices for agentic engineering while contributing to Rapid Build initiatives for faster customer value.

Qualifications

• Experience with .NET, C#, ASP.NET Core, APIs and Microsoft Azure.
• Experience delivering software in customer or production environments.
• Ability to turn unclear requirements into workable designs and specifications.
• Confidence discussing technical choices with engineers, customers and other stakeholders.
• Practical experience with AI-assisted development tools.
• Willingness to experiment, challenge ideas and change your own opinion when someone has a better one.

Responsibilities

• Translate customer questions into clear technical designs and specifications.
• Design and build solutions using Azure, .NET, ASP.NET Core, APIs and relevant front-end technologies.
• Use tools such as GitHub Copilot, Claude and Cursor as part of the engineering process.
• Review the plans, code and tests produced by agents and intervene where technical judgement is needed.
• Explain different approaches and trade-offs to customers and colleagues.
• Help develop reusable practices for agentic software engineering.
• Contribute to Rapid Build and other propositions that help customers move from an idea to something tangible faster.

Job description

Build with agents. Stay accountable for the engineering.

AI tooling can generate code. It cannot decide what should be built, which technical approach makes sense or what is good enough for a real customer environment.

At Rapid Circle, agentic tooling is becoming part of how we build software. Not as a replacement for engineering judgement, but as a way to help experienced engineers move faster.

We are looking for a senior software engineer who can work across development, design and architecture. Someone who understands the problem before jumping into the solution and can create enough structure for both people and agents to work effectively.

The role in practice

You will work on Azure-based software solutions for customers in different industries, usually across one or two engagements at a time. One project may involve turning an early idea into a working solution. Another may require you to build within an established enterprise environment where security, integrations and maintainability are just as important as speed.

You will:

• Translate customer questions into clear technical designs and specifications
• Design and build solutions using Azure, .NET, ASP.NET Core, APIs and relevant front-end technologies
• Use tools such as GitHub Copilot, Claude and Cursor as part of the engineering process
• Review the plans, code and tests produced by agents and intervene where technical judgement is needed
• Explain different approaches and trade-offs to customers and colleagues
• Help develop reusable practices for agentic software engineering
• Contribute to Rapid Build and other propositions that help customers move from an idea to something tangible faster

This is consulting, so requirements may change, scope can move and different customers bring different technical landscapes. You should enjoy that variety rather than need every project to arrive fully defined.

What this asks of you

You bring strong hands-on experience across software development, design and architecture. You can build software yourself, but you can also step back, structure a problem and explain why one approach makes more sense than another.

We are looking for:

• Experience with .NET, C#, ASP.NET Core, APIs and Microsoft Azure
• Experience delivering software in customer or production environments
• The ability to turn unclear requirements into workable designs and specifications
• Confidence discussing technical choices with engineers, customers and other stakeholders
• Practical experience with AI-assisted development tools
• A willingness to experiment, challenge ideas and change your own opinion when someone has a better one

We value people who can show how they think. That might be through customer projects, architecture work, GitHub contributions, technical writing or something you built yourself.

Why Rapid Circle?

You are joining while our approach to agentic engineering is still taking shape. Different engineers are already working with GitHub Copilot, Claude, Cursor and other tools. We are now bringing those experiences together into shared practices around specifications, orchestration, testing and code review.

You will help shape that way of working, not simply follow it.

You will work with experienced engineers, architects and Microsoft MVPs in an international team. Technical leadership remains closely involved in the work, and there is room for training, experimentation, internal development and hackathons alongside customer delivery.

The attraction is not being the smartest person in the room. It is working with people who continue to challenge how you think.

The kind of work you could be doing

Rapid Build is our specification-driven approach to helping customers turn an idea into something they can see, use and respond to. You could help improve how specifications are structured, how agents divide the work and where engineers need to intervene.

The team has also built an enterprise IoT platform for an energy manufacturing company, monitoring remote generator sets and processing telemetry for performance and optimisation. That required not only new development, but also security, enterprise integration and long‑term manageability.

We need engineers who can work in both worlds: experimenting with something new and making sure it survives contact with reality.

What we offer you

• A competitive salary based on your experience
• A pension scheme through Allianz
• €50 net representation allowance per month
• €25 vitality budget per month through Alleo
• A lease car or mobility arrangement
• A laptop and phone
• Hybrid working from home and our offices in Amsterdam and The Hague
• Room for training, certifications, knowledge days and hackathons
• Access to GitHub Copilot and the development tooling you need

Interested?

Curious whether this role fits the way you like to work? We would be happy to hear more about your experience and the kind of engineering challenges you enjoy solving.

You do not need to have worked with every tool mentioned. What matters most is how you approach complex technical problems, make decisions and learn from what does not work.