Software Engineer(.NET) - Tech Lead

Budget Thuis; Amsterdam; Hybrid; EUR 56,000 - 79,000; Full time

Benefits offered by this job

Gross salary €5,000-€7,100 per month

Hybrid 50/50 working

One remote month per year

13th month salary

Pension: 16%

Travel allowance

ClassPass credits

OpenUp mental health access

Job summary

Budget Thuis is seeking a Tech Lead for Customer Care to steer our AI stack, including an LLM-powered chatbot with voice, the Knowledge Base/RAG pipeline, and deployment tooling. You will mentor engineers, review code, and drive delivery with a close partnership with the architect and Engineering Manager.

The role is senior and hands-on (about 70% leadership, 30% coding). A strong background in C#, Kubernetes, and real-time web tech is expected, with a passion for AI and learning.

Qualifications

• Experience as Tech Lead, Staff Engineer, or Engineering Lead in a software team.
• Solid C# fundamentals with Kubernetes and Azure knowledge for production systems.
• Familiarity with real-time web technologies like WebSockets and React.
• Communication that conveys complex AI pipelines to engineers and stakeholders.
• A basic understanding of AI systems and a real drive to learn more.
• A track record of mentoring and developing teammates.

Responsibilities

• Translate product and domain challenges into clear technical approaches balancing speed and quality.
• Review designs, pair with engineers, and coach through hard decisions.
• Keep services observable, secure, resilient, and production-ready on Kubernetes.
• Collaborate with the architect on domain boundaries and system scope.
• Improve day-to-day tooling, CI/CD, and testing for long-term gains.
• Foster a culture of learning and ownership over shipped work.

Skills

Tech Lead experience

C# fundamentals

Kubernetes & Azure

WebSockets & React

Communication skills

AI basics

Continuous learning

Tools

Semantic Kernel

Azure AI Foundry

Job description

What you'll do

As Tech Lead for Customer Care, you own the technical direction of the team building our customer-facing AI stack: an LLM-powered chatbot with voice as a core capability, the Knowledge Base/RAG pipeline that feeds it, and the tooling and feedback loop the team uses to keep improving both. Real customers with real questions about their energy bill or internet contract get answers your team builds. That's the weight of it, and the fun of it.

Day to day, this looks like:

• Translating product and domain challenges into clear technical approaches that balance speed, quality, and long-term stability.
• Being in the code and in the room: reviewing designs, pairing with engineers, and coaching them through harder decisions instead of making those decisions for them.
• Keeping services observable, secure, resilient, and genuinely production-ready on Kubernetes.
• Working closely with our architect on where this team's systems end and the rest of the domain begins.
• Making the team's day-to-day better through tooling, CI/CD, and testing practices that pay off over months, not just this sprint.
• Building a culture where people want to keep learning and take ownership of what they ship.

About the team

The team builds the suite of AI tools that supports our customers: a chatbot with voice as a core capability, the Knowledge Base/RAG pipeline behind it, and the feedback loop that keeps improving both. It's a small team in the customer care domain, working alongside an internal architect, a QA engineer, and an external delivery partner. You report to the Engineering Manager, who owns people and direction, while you run delivery day to day, coach engineers who own their own solutions, and work out with the architect how domain-wide direction gets built inside the team. The team is early enough that you'll shape real decisions instead of inheriting them.

What you bring

We're looking for a senior, hands-on engineer who leads from inside the work, someone who still reviews and writes code instead of only diagramming it. This is a leadership-forward role, roughly 70% leadership and 30% hands-on, so a track record of mentoring and developing the people around you matters at least as much as any single technology on your CV.

You’ll need:

• Experience as a Tech Lead, Staff Engineer, or Engineering Lead in a software team.
• Solid C# fundamentals, with enough Kubernetes and Azure knowledge to reason about production systems.
• Familiarity with real-time web technologies like WebSockets and React.
• Communication that works both with an engineer mid-debug and with a stakeholder who's never heard of a RAG pipeline.
• A basic understanding of AI systems.
• A real drive to learn about AI

Nice to have, not required:

• Experience with agentic workflow design or RAG systems.
• Familiarity with orchestration frameworks such as Semantic Kernel or Azure AI Foundry.
• Experience with voice or speech pipelines (STT/TTS, real-time audio).
• Experience with technical hiring.

If you meet most of the above and the rest sounds like something you'd enjoy growing into, we'd still love to hear from you. We're hiring someone who’ll grow with the role, not a finished checklist.

At Budget Thuis, we think it’s important that you can be 100% yourself. We're open to different perspectives and personalities. For this role, we’re especially looking for someone who enriches our team in every way, someone who adds real value from their own background.

Why the grass is greener here

• A gross monthly salary of €5.000,- to €7.100,- based on a 40-hour workweek;
• 13th month salary;
• Budget Summer Holiday: every Friday off in July and August (9 extra days);
• 1 paid volunteering day per year;
• 25 holiday days, with the option to buy 1.5 extra weeks;
• Pension: 16% of gross salary incl. holiday allowance (11% Budget Thuis, 5% own contribution);
• Monthly ClassPass credits;
• Travel allowance: Swapfiets or NS Business Card, your choice;
• Free mobile and internet subscription from Budget Thuis;
• Hybrid working (50/50);
• 1 month per year fully remote;
• Free access to OpenUp for mental health support and courses.

Relocation is not possible.