Directio is a global IT services company. We consult, code, test, deploy, and manage mainly cloud-based and mobile applications, providing around-the-clock support from our offices in Poland, the Philippines, Mexico, and the USA. We prepare our FMCG, retail, automotive, and SaaS clients for the future by accelerating their digital transformation. Operating under the “We Code Success” principle, we prioritize the success of our clients, consultants, and partners. About project:  We are looking for a FullStack Developer for our multinational client, who specializes in developing marketplaces and systems aimed at lowering the costs of IT products. They emphasize transparency, price comparison, and real-time delivery options. Responsibilities: As Fullstack Developer you will be designing and developing backend and frontend components using .NET Core for server-side logic and React for building dynamic, responsive user interfaces;You will be actively contributing to architecture and system design discussions, helping shape technical decisions, system patterns, and long-term platform strategy;You will be ensuring high code quality by performing code reviews, applying clean coding principles, writing maintainable code, and supporting automated and manual testing practices;You will be working hands-on across the full technology stack, including backend services, frontend applications, and infrastructure components that support deployment, scaling, and system stability; You will be mentoring junior developers, guiding them in best development practices, reviewing their work, and supporting their growth within the team. Requirements:  8+ years of experience building data-heavy web applications, ensuring you can design performant, scalable systems that handle complex data workloads;  Strong expertise in C#, ASP.NET Core, and modern JavaScript, allowing you to develop robust backend services and seamless front-end integrations; Experience with React, enabling you to build dynamic, responsive, and component-driven user interfaces; Solid understanding of database design - SQL or NoSQL - and ORM frameworks, ensuring efficient data modeling, querying, and maintainable data access layers; Familiarity with cloud platforms such as Azure, AWS, or GCP, allowing you to deploy, monitor, and optimize applications in cloud-native environments; Experience with distributed systems and event-driven architecture, enabling you to build resilient, scalable, and loosely coupled backend services; Knowledge of infrastructure-as-code practices, supporting reliable, automated, and repeatable deployment processes. Nice to have: Experience working with Blazor, allowing you to contribute to modern .NET-based front-end development. We offer:  Salary for work amounting to 25 000 – 29 000 + VAT on B2B; Flexible working conditions; Private healthcare, Multisport card and trainings.  Please be advised that we will only contact selected candidates