Senior/Lead Fullstack Developer (React+.NET)

We are looking for an experienced Fullstack Developer with expertise in recent .NET technologies and frontend development using the React framework. We are especially interested in someone who would like to grow into a Tech Lead role, taking more responsibility for technical decisions, mentoring others, and shaping the architecture of our solutions.

We value direct communication, an open approach to problem-solving, and a willingness to learn new technologies.

Currently, we are working on an extensive reporting system that provides detailed information on fuel economy.

You will be working on cutting-edge, cloud-based software. Our tech stack includes C#, .NET, React, TypeScript, AWS/Azure, microservices, Docker, Kubernetes, RabbitMQ, and gRPC.

In Short

🌎 100% REMOTELY or from one of our 2 offices (Wrocław, Bielsko-Biała)

💰 Salary 125 PLN - 150 PLN net / h

☑️ B2B contract

Your Daily Missions

• Implementing new functionalities and creating scalable software using .NET, React, and TypeScript technologies.

• Contributing to a cross-functional product team.

• Writing clear, maintainable, and testable code with a focus on good testing practices, including unit, integration, and end-to-end testing.

• Estimating, prioritizing, planning, and coordinating development and testing activities.

• Staying up to date with new development, testing tools, and architectural design strategies.

• Supporting the team with feedback, code reviews, and pair programming.

• Being a part of a SCRUM team.

The Essentials We’re Seeking

• Over 4 years of commercial experience in programming.

• Hands-on experience with C#, .NET, React, and TypeScript.

• Familiarity with modern frontend frameworks and libraries (e.g., Next.js, Gatsby).

• Good knowledge of cloud solutions in AWS or Azure.

• Solid knowledge of databases such as MS SQL, NoSQL, and ElasticSearch.

• Experience in building applications in modular monolith and microservices architecture (understanding the concepts, using message queues, and working with object databases).

• Knowledge of solid coding practices, including peer code reviews, unit testing, continuous integration, and TDD.

• Familiarity with development approaches such as DDD, CQRS, and Clean Architecture.

• Proficiency in Entity Framework and the ability to write efficient queries.

• Experience with containerization tools like Docker and working in dockerized environments.

• A keen interest in staying current with the latest trends and techniques in the industry.

• Comfortable communicating in Polish and English (B2 level minimum).

• Experience with AI tools such as CursorAI, Claude Code, Codex, Copilot, etc.

Reasons Why You Would Enjoy Working With Us

• We work in the latest technologies and with international clients, and our projects are polished from < to /> - learn about some of the projects we have completed.

• We organize TechTalks, meet-ups and create guilds where we exchange knowledge - you can learn a lot from your teammates.

• We have a close-knit team and we make sure to have regular integrations - we often go out to celebrate together.

• You can work remotely or choose to work from our offices in Wroclaw or Bielsko-Biala. However, we count on your openness to occasionally visit the office for team meetings or client visits, or possible occasional trips to the client's headquarters.

• You can adjust your working hours to suit your needs, starting your day between 7:00 and 10:00 am.

• You can work with great specialists in their fields who also have a sense of humor and other after-hours hobbies. It is the people who create the unique atmosphere and relaxed atmosphere at CSHARK.

• We have a flat structure - we are not a corporation and don't want to be one 🙃.

• We offer bonuses for employee referrals (from 3000 PLN to 7000 PLN).

• We organize remote English classes and provide access to the company library. You can also become an author/author of articles published on our technical blog - https://cshark.com/blog/.