Back-end Engineer

We're looking for an experienced Back-End Developer to join our team and help build and evolve our enterprise SaaS platform. The role is primarily back-end focused (~75%), with regular involvement in front-end work (~25%) — we value developers who can own features end-to-end. You'll work on a multi-tenant system powering audit management, training, compliance, and reporting workflows for organizations worldwide.

Back-End (primary focus):

• Language & Framework: C# / .NET 8, ASP.NET Core Web API
• Databases: MySQL 8.0+ (primary), Entity Framework Core 8.0, Dapper
• Cloud: AWS (Lambda, SQS, S3, CloudFront, Secrets Manager, MediaConvert, QuickSight)
• Caching: Redis (StackExchange.Redis)
• Messaging: AWS SQS, MediatR (CQRS)
• Architecture: Clean Architecture, microservices, multi-tenancy, background job processing
• Auth: JWT, SAML2, AWS Cognito
• API: REST with OpenAPI/NSwag, API versioning

Front-End (secondary focus):

• Framework: Angular 21+ / TypeScript
• State Management: NgRx (Store, Effects, Signals)
• Styling: Tailwind CSS, SCSS, Angular Material
• Cross-Platform: Capacitor (iOS, Android, Windows)
• Testing: Jest

Shared:

• CI/CD: GitHub Actions, Jenkins, Docker
• Monitoring & Logging: Serilog, Elasticsearch/OpenSearch, LogRocket

What You'll Do

• Design, develop, and maintain back-end services and REST APIs
• Build and optimize database queries and data access layers (EF Core, Dapper)
• Develop and support microservices for audit, training, notification, and export workflows
• Work with AWS services (Lambda, SQS, S3) for async processing and infrastructure
• Implement caching strategies with Redis for performance-critical paths
• Pick up front-end tasks — build Angular components, integrate API endpoints, fix UI bugs
• Work across the full stack when delivering end-to-end features
• Participate in code reviews, architectural discussions, and technical decision-making
• Write unit tests (xUnit, Moq on back-end; Jest on front-end) and ensure code quality
• Troubleshoot production issues using structured logging and monitoring tools

Must Have

• 4+ years of commercial experience with C# / .NET (Core/.NET 5+)
• Strong knowledge of ASP.NET Core Web API and RESTful API design
• Hands-on experience with Entity Framework Core (migrations, query optimization, global filters)
• Solid understanding of relational databases (MySQL or PostgreSQL) — query tuning, indexing, schema design
• Experience with TypeScript/JavaScript (back-end or front-end)
• Experience with message queues (SQS, RabbitMQ, or similar) and async processing patterns
• Understanding of Clean Architecture, SOLID principles, and dependency injection
• Experience writing unit tests and working with mocking frameworks
• Working knowledge of TypeScript and a modern front-end framework (Angular preferred, React/Vue considered)
• Willingness to regularly contribute to front-end code and deliver features end-to-end
• Familiarity with Git and pull request workflows

Nice to Have

• Hands-on experience with Angular (components, services, RxJS, reactive forms) or React/Next.js
• Experience with NgRx or similar state management
• Experience using AI-assisted development tools (GitHub Copilot, Claude Code, Cursor, or similar) to boost productivity
• Experience with AWS services (Lambda, S3, SQS, CloudFront, Secrets Manager)
• Knowledge of Dapper for performance-critical queries alongside EF Core
• Experience with MediatR and CQRS patterns
• Experience with Tailwind CSS and Angular Material
• Background in Python (for Lambda functions or data processing) is a plus
   
• We offer:
• Great office location 3 minutes from Pecherska metro station and great office conditions;
• Flexible working hours;
• Comfortable working place;
• Medical insurance after the trial period ending;
• Team-building activities;
• Possibility of business trips to the US;
• 24 paid vacation days per year;
• 5 paid sick leave days per year.