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

Esurance; Polska; Hybrid; PLN 180,000 - 260,000; Full time

Job summary

Esurance Poland is seeking a Senior Full-Stack Engineer to join our product development team. You will build with a modern microservices architecture, backend ASP.NET Web API with C#, and frontend React/TypeScript. This hands-on role has a 70/30 front-end to back-end focus in a cloud-native environment.

The ideal candidate will own features end-to-end, mentor others, and collaborate with product owners. English at B2 level; German is a plus but not required.

Qualifications

• MSc+ in Computer Science or equivalent.
• 5 years of proven React front-end experience.
• At least 2 years building secure REST APIs with ASP.NET.
• Knowledge of microservices and cloud design patterns.
• Strong ownership of technical work.
• English at B2 level; German desired but not required.

Responsibilities

• Design, implement and maintain modern React micro frontend applications.
• Implement and deliver Full-Stack Features with ASP.NET and React/TypeScript.
• Clarify feature requirements with Product Owners and ensure business context.
• Ensure features meet Definition of Done with robust test coverage.
• Support incident response and production issue resolution.
• Coach colleagues and share knowledge on best practices.

Skills

React

ASP.NET

TypeScript

Microservices

Cloud design patterns

Ownership

Education

MSc+ in Computer Science

Tools

AWS

DDD

Job description

Job profile

We’re looking for aSeniorFull-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 interfacesusing mainlyReactand TypeScript. This is a hands‑on engineering role with a 70/30 front-/backend focus.

We leverage AI in our SDLC and we are seeking for a Full‑Stack Engineer who is capable of producing high quality code with the support of AI, yet having the maturity and self‑expectation to review and understand the granter scheme of the code in the complexity of the product and adjust accordingly. This role is ideal for for you if you like to take ownership, thrive in a dynamic product team, and enjoy mentoring others. If you're passionate about designing high‑impact software in a cloud‑native environment, we’d love to hear from you.

What you will be responsible for

• Design, implement and maintain modern React micro frontend applications
• Implement and deliver Full-Stack Features including the infrastructure for it using both, ASP.NET and React/TypeScript
• Work closely with Product Owners to clarify feature requirements and ensure business context is well‑understood and the product build accordingly
• Ensure features meet Definition of Done, with state‑of‑the‑art unit, integration, and end‑to‑end test coverage.
• Support incident response and production issue resolution as per team standards.
• 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 Reactis a non-negotiable must have.

• At least 2 years of experience in building secure REST APIs using ASP.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:

This Poland-based role is employed through our Employer of Record, Remote.com, on an Umowa o Pracę (gross) contract. We do not offer B2B contracting. You can work remotely from Poland, but this is not a globally remote role. You must live in Poland, because the team meets in person in Poland for at least one week each quarter.

ID Verification:

To maintain a fair and secure hiring process, candidates may be asked to verify their identity via our 3rd party provider PEScheck before speaking with our Recruiter. This step is unfortunately needed sometimes to helps us prevent fraud and focus our resources on genuine applicants. You can help us skipping that step by providing your full application documents in the first place. Thanks for your understanding.

Questions? Email: [e-mail]