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November 3, 2026
.NET Backend Developer
Senior • On-site
Gdańsk, Poland
Quick Facts
Role: .NET Backend Developer
Team: Portal Solutions Team (backend for mobile corporate clients)
Description
You will develop and design backend components and processes that support mobile applications for corporate clients. You will work on system and functional solutions including processes, integrations, business logic, and user interactions, and participate in designing distributed architecture (microservices, distributed systems, SOA). You will focus on enterprise-grade security and performance, collaborate with analysts and business stakeholders, and support agile delivery and testing/quality.
Responsibilities
Develop and design backend components and processes for mobile corporate-client applications
Design system and functional solutions: processes, integrations, business logic, mockups, and user interactions
Participate in architecture design for microservices/distributed systems/SOA
Work on enterprise security and system performance
Collaborate with analysts and business on requirements
Support delivery process and coordinate implementations
Improve testing, product architecture, and code quality
Build solutions using Agile/Scrum methodologies
Requirements
Minimum 5 years of experience as a .NET Developer in IT projects (finance domain preferred)
Solid knowledge of REST, SOAP, Kafka, Redis, SQL Server, Entity Framework, Microservices, .NET 6/8, and .NET Framework 4.8
Strong communication skills and ability to explain complex technical topics
Understanding of distributed architecture principles, application optimization, and DDD
Fluent English
Teamwork and ability to independently organize work and set priorities
Additional Advantages
Experience supporting mobile applications (Android/iOS)
Security certifications
Project management certifications and practical application
Experience with user story mapping and event storming
Benefits
Employment contract with periodic bonus
Real impact on the product direction for corporate clients
Opportunity to work on large-scale, highly complex technical projects
Knowledge-sharing culture and technical decision-making in agile teams
Modern in-house stack and solution development
Stability and growth opportunities as part of a major financial institution
Access to Mindgram and MyBenefit platform (discounts/benefits, including sports card, cinema tickets, prepaid cards, shopping vouchers)
Medical care and ability to join group insurance on preferential terms
Hybrid work model in a modern office in Gdańsk (Targ Drzewny 1)
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