Senior Full-Stack Engineer (React 70% / .Net 30%)

Job profile

We’re looking for a Senior Full-Stack Engineer who brings deep technical expertise and a collaborative mindset to our product development team. You will work with a modern microservices architecture, building scalable backend services using the ASP.NET Web API with C#, and intuitive frontend interfaces using mainly React and TypeScript. This is a hands-on engineering role with a 70/30 front-/backend focus, ideal for someone who likes to take ownership, thrives in a dynamic product team, and enjoys mentoring others. If you're passionate about designing high-impact software in a cloud-native environment, we’d love to hear from you.

This Poland-based role offers remote flexibility, but we value in-person collaboration and our team meets in Poland for at least one week each quarter, so we request all applicants to be located in Poland.

This is not a globally remote role. Poland residency is required. The contract form is Umowa o Pracę (brutto).

What you will be responsible for

1. Design, implement and maintain modern React micro frontend applications
2. Maintain and incrementally improve scalable web APIs using ASP.NET within an established microservices ecosystem.
3. Work closely with Product Owners to clarify feature requirements and ensure business context is well-understood.
4. Ensure features meet Definition of Done, with state-of-the-art unit, integration, and end-to-end test coverage.
5. Support incident response and production issue resolution as per team standards.
6. Actively contribute to team knowledge sharing and coach colleagues in technical best practices.

What makes you a match

Essential Qualifications:

• MSc+ in Computer Science or equivalent
• 5 years of proven experience in building solid front-end applications with React is a non-negotiable must have .
• At least 2 years of experience in building secure REST APIs usingASP .NET
• Comprehensive knowledge of contemporary web application architectures, with a focus on microservices and cloud design patterns.
• Demonstrated ability of high technical Ownership is requirement for this role.

Bonus Skills:

• Hands-on experience with AWS infrastructure.
• Experience working in cross-functional product teams using Agile practices and following Domain-Driven Design (DDD).

Collaboration and Interpersonal Skills:

• Clear and adaptive communication with both technical and non-technical stakeholders.
• Strong sense of ownership, accountability, and proactive problem-solving.
• Languages:
  • English: B2 - (No certificate required, but Fluency)
  • German : desired, not required

What you can expect

A dynamic, ambitious team where your voice is heard, and your contributions truly matter. You’ll have real ownership over your decisions in a trusted, cross-functional environment within a Swiss product company that puts people first. We offer fair compensation, flexible working hours, a hybrid work setup, and a culture that supports both personal and professional growth, fostering a healthy work-life balance.

Employer of Record:

For this role, we offer employment through our trusted Employer of Record provider Remote.com, ensuring full legal compliance and a seamless experience for our team members in Poland.

ID Verification:

To maintain a fair and secure hiring process, candidates may be asked to verify their identity before speaking with our Recruiter. This step helps us prevent fraud and focus our resources on genuine applicants.

About us

Who we are

esurance is a Swiss InsurTech offering a SaaS platform that connects SMEs, insurance providers, brokers, and business application providers. Founded in 2013, we’re on a mission to make health insurance for small businesses truly hassle-free.

What makes us unique

You’ll be part of a connected, forward-thinking team built on trust, openness, and mutual respect — working hybrid from Zürich or remotely across Europe. We invest in your growth through agile practices, real ownership, and a transparent Grading System that ensures fair pay and clear career paths.

Our core values

• We are connected.
• We are ahead.
• We are clear.
• We are approachable.

Do these resonate with you? Come join us.

Our Recruitment Process & Principles

We keep our process transparent and respect your time:

1. Application Review — You hear from us within 5 business days. Always.
2. Recruiter Screen — A relaxed Get2Know call to explore mutual fit.
3. Interview Round — Two Role Knowledge interviews (peer + supervisor), one Culture Match, one Leadership conversation. Batched into two days wherever possible.
4. Hiring Decision — Thoughtful, timely. You’ll know within 1-2 weeks.

Use of Artificial Intelligence (AI)

We use AI to increase productivity and you’re welcome to use it to polish your CV or Coverletter. Interviews and assessments should reflect your genuine self, though.

Recruiting Agencies

We don’t work with unsolicited agency submissions. Thanks for respecting this.