.NET Engineer Middle

We are looking for a .NET Engineer to join us in developing and expanding our fintech product. You’ll become part of a team with strong expertise in research, analysis, and product development, working on scalable, high-traffic systems where technology and data play a key role in shaping the product. We combine deep technical expertise, data-driven decision-making, and a strong focus on continuous improvement to build innovative solutions that address real-world challenges in the fintech industry. If you enjoy solving complex engineering problems, working with modern technologies, and seeing your ideas make a tangible impact, we’d love to hear from you. Our technology stack: C#, .NET 10, PostgreSQL, Redis, ClickHouse for big data storage and analytics, REST and GraphQL APIs, RabbitMQ, Apache Kafka, Docker, Kubernetes, AWS. GitLab, ArgoCD. Jira, Confluence, AI tools (ex. Claude Code). Responsibilities: Design, develop and maintain scalable solutions for high-traffic systems using C# and modern .NET Analyze business and technical requirements and translate them into scalable, maintainable software architectures Collaborate with engineers and cross-functional stakeholders to design and deliver features Write clean, maintainable, testable and well-documented code, supported by unit, integration and load tests Investigate production issues and improve system observability through effective use of logs, metrics, traces, and business data Research and introduce new technologies, tools and engineering practices that can improve product quality and development efficiency Challenge existing approaches and actively contribute to the continuous improvement of the team, processes and product Requirements: 3+ years of сommercial experience with C# and modern .NET Solid understanding of OOP, design patterns, data structures and algorithms Hands-on experience with multithreading and asynchronous programming Hands-on experience building and operating production systems Familiarity with distributed systems and event-driven architectures, including message brokers such as RabbitMQ or Kafka Understanding of scalability and reliability principles, with some exposure to performance tuning Solid experience with relational databases (preferably PostgreSQL); familiarity with NoSQL is a plus Experience working with APIs (any of REST, GraphQL, or gRPC) Hands-on experience with Entity Framework Hands-on experience with Docker; basic understanding of Kubernetes concepts Experience writing unit and integration tests Experience with any tools for continuous integration and delivery (preferably GitLab and ArgoCD) Comfortable working in a fast-paced Agile environment Understanding of modern AI capabilities and limitations, with hands-on experience using AI-powered coding assistants or agents English proficiency at B1 level or higher for technical discussions and documentation Will Be a Plus: Experience with ClickHouse or other analytical databases for large-scale data processing Experience with AWS or other cloud platforms Experience with fintech, trading, or other high-load domains We offer: Tax expenses coverage for private entrepreneurs in Ukraine Expert support and guidance for Ukrainian private entrepreneurs 20 paid vacation days per year 10 paid sick leave days per year Public holidays as per the company's approved Public holiday list Medical insurance Opportunity to work remotely Professional education budget Language learning budget Wellness budget (gym membership, sports gear and related expenses)