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Full Stack Developer at Sigma Software. Location Information: Ukraine. Company Description. We are looking for a talented Full Stack Developer to join our team and build efficient, scalable solutions for the Performance Management Bandwidth Estimator. If you want to grow in a modern tech environment with React, Python/FastAPI, Docker, and Azure, work with microservices, and be involved in all stages of development — this role is for you!. CUSTOMER. The client is a leading company in the telecommunications industry, renowned for delivering innovative, large-scale technological solutions. . PROJECT. The project involves developing and maintaining core components of the Performance Management Bandwidth Estimator, helping customers estimate PM event file sizes, required bandwidth, and event distribution across network functions. .  . Job Description. Code, debug, document, and maintain frontend and backend components . Perform unit, integration, and e2e testing . Participate in peer code reviews . Take part in task estimation and sprint planning . Contribute to technical project documentation and user manuals . Assist QA engineers and support personnel in resolving software installation and operational issues . Follow best engineering practices and project quality standards . Report status and progress according to project and company requirements . Identify deficiencies in development processes, procedures, engineering practices, or environment configurations and suggest improvements . Qualifications. 2–4 years of professional software development experience with commercial-grade systems . Strong proficiency in frontend development: React, JavaScript, HTML/CSS . Strong proficiency in backend development: Python, FastAPI . Experience with Docker and cloud infrastructure (Azure) . Solid understanding of microservices architecture . Experience with unit, integration, and automated/e2e testing . Familiarity with Agile development processes . Full-stack development capability (comfortable working on both frontend and backend) . Upper-Intermediate level of English or higher.  . Additional Information. PERSONAL PROFILE. A proactive and results-driven Full-Stack Developer, comfortable working remotely. Strong communicator, self-motivated, and capable of handling both frontend and backend tasks. Enjoys solving complex problems and contributing to scalable, high-quality software solutions.