Mid/Senior Full-Stack Developer (.NET + React)

What you will do

About Polcode

Polcode is a Poland-based software house working with clients worldwide since 2006. We build web, mobile, and eCommerce products for startups and well-established companies across Europe, the US, and beyond. What makes us different? We put people first while staying deeply tech-driven - People at heart | Technology in mind. We trust our teams, encourage ownership, share knowledge daily, and create a place where everyone can grow and feel at home. 💜

Role Overview

We’re looking for a **strong Mid or Senior Full-Stack Developer (.

NET + React) **to join an ongoing project and work directly with a client team based in Israel.

The project is in the insurance domain and combines further development of an existing system with a broader transformation from a legacy, on-premises solution towards a cloud-based SaaS model. Backend development is the main focus, but you’ll also work across the stack, including React.js interfaces, external integrations, legacy refactoring, and AI-powered automation.

This is a role where the person behind the technical skills matters a lot. We’re looking for someone who communicates clearly, takes responsibility, works independently, and is comfortable discussing technical challenges and progress directly with an international team.

Why this project is worth your attention:

• Ongoing cooperation with no fixed end date
• Opportunity to contribute to the transformation of an existing insurance system towards a SaaS model
• A varied engineering scope combining backend, frontend, integrations, architecture, and legacy modernization
• Backend-focused role without being limited to one part of the stack
• Exposure to AI-powered automation and modern AI-assisted development workflows
• Direct cooperation with an international client team
• A role where communication, ownership, and engineering judgment are genuinely important.

Get ready to:

• Develop backend business logic using .

NET / C#

• Build and maintain REST API integrations with insurance companies and external services
• Contribute to the system’s transition from an on-premises architecture towards a cloud-based, multi-tenant SaaS model
• Work on multi-tenancy concepts, including database and schema isolation
• Develop and improve responsive React.js interfaces for desktop, tablet, and mobile
• Support RTL / Hebrew-oriented frontend views where needed
• Maintain and refactor legacy code while improving system performance, security, and architecture
• Work with integrations such as WhatsApp and automated dialer systems
• Contribute to AI and bot integrations using MCP (Model Context Protocol)
• Use AI-assisted development tools as part of your day-to-day engineering workflow.

What we offer

Perks of being a #Polcoder:

• 100–180 PLN/H netto + VAT
• 100% remotely (within Poland only) or in our office: Warszawa
• Multisport card, private medical care, life insurance, and meaningful gifts to celebrate important days
• All the necessary equipment for comfortable work
• Professional onboarding process
• We respect your private life - no overtime, no weekend jobs, work-life balance only, promise!
• Work at times that suit your daily rhythm, from the place of your choice
• Your work is appreciated - we believe in the power of feedback, as well as the one you give us.
• Use annual budgets for attending workshops, events, business trips, conferences and language lessons.
• Dive into global projects tailored to your core strengths, while building new skills through each project.
• Feel the rhythm of the international IT market. We adapt only technologies that are up-to-date with the latest industry standards.
• Attend after-hour parties and team-building events, face sports challanges and take part in other company activities. Make friendships that last over the years.

Requirements

What we're looking for:

• Strong commercial experience with .

NET / C#

• Good hands-on knowledge of React.js
• Experience building and integrating REST APIs and working with webhooks
• Experience with relational databases
• Understanding of SaaS architecture and multi-tenancy concepts
• Experience in the insurance / Insurtech domain
• Ability to work independently and take responsibility for complex tasks and modules
• Flexibility to move between backend, frontend, maintenance, integrations, and new development
• Strong communication skills and the ability to clearly discuss progress, blockers, and technical decisions
• English at B2/C1 level for comfortable day-to-day communication in an international team.