Senior Backend Developer (Remote)

Czym będziesz się zajmować?

• Architect and build robust, scalable backend systems using .NET Core / 6 / 7.
• Optimize performance for speed and reliability, ensuring security and compliance with industry standards.
• Integrate with third-party APIs and payment processing systems.
• Lead the transition to microservices architecture, designing modular solutions for maintainability.
• Implement and maintain CI / CD pipelines to streamline development and deployment processes.
• Monitor and log system health, proactively detecting and resolving issues.
• Mentor junior team members through pair programming and code reviews.
• Write clean, maintainable code, utilizing TDD and unit testing for high-quality software.
• Collaborate in Agile development teams and contribute to continuous improvement initiatives.
• Support Product Managers by assessing solution alternatives and providing technical recommendations.

Kogo poszukujemy?

Minimum 8 years of experience as a Backend Developer.

Strong knowledge of C#, .NET Core / 6 / 7, Clean Code principles (TDD, SOLID), and Clean Architecture.

Experience working with distributed systems and microservices.

Proven track record in building and launching trading platforms or financial systems.

Deep understanding of trading system functionalities (order routing, execution, risk management).

Excellent problem-solving and communication skills; ability to explain technical concepts clearly.

Bachelor’s degree in Computer Science, Engineering, or a related field.

Experience in financial services or payment provider integrations is highly valued.

Proficiency in English (both written and spoken) required.

Czego wymagamy?

8 lat doświadczenia na podobnym stanowisku

Znajomości :

Clean code

Azure

CI / CD

Języki :

Polski

Angielski

Jakie warunki i benefity otrzymasz?

26900-33600 PLN miesięcznie

B2B - Elastyczne godziny pracy (100%)

Praca zdalna : W całości

Kim jesteśmy?

At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.