Senior Full Stack Developer, Java, React

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Sigma Software Group

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2002

🎮 Gaming

📡 Telecommunications

Software Development • Gaming • Telecommunications

Sigma Software Group is a multinational company, established in 2002, that specializes in providing high-quality software development, graphic design, testing, and support services. The company focuses on delivering solutions across various industries such as automotive, telecommunications, aviation, advertising, gaming, banking, real estate, and healthcare. Sigma Software values professional growth, offers remote work opportunities worldwide, and caters to world-renowned clients like AstraZeneca, Scania, and SAS. The company emphasizes a culture of continuous education, mentorship, and flexible work environments, making it a preferred workplace for IT specialists aiming to work on complex solutions utilizing cutting-edge technologies. Sigma Software is committed to innovative solutions and engineering the future while also contributing to social causes such as charitable work in Ukraine.

📋 Description

• Design, develop, and implement large-scale distributed systems to handle substantial data volumes, ensuring scalability, low latency, and fault tolerance • Implement APIs and event-driven solutions to meet system requirements and enhance functionality • Create and execute comprehensive unit tests, API tests, regression tests, and performance tests to ensure the reliability and efficiency of the system • Utilize modern frontend frameworks like React for web development • Optimize solutions for scalability, reliability, and high performance • Collaborate closely with cross-functional teams to promptly address and resolve production incidents, ensuring minimal downtime and swift recovery

🎯 Requirements

• 5+ years of experience in software development with object‑oriented programming languages, specifically Java • Solid hands-on experience with frontend frameworks, specifically React • Extensive experience in building multi‑tier web applications and creating REST APIs • Strong understanding of OOP principles, design patterns, algorithms, and data structures • Practical knowledge of cloud platforms like AWS, Google Cloud, or Azure • Experience with CI/CD pipelines and containerization tools like Docker or Kubernetes • Familiarity with both relational and NoSQL databases such as HBase, Cassandra, MongoDB, Redshift • Hands‑on experience in Linux/Unix environments • Strong analytical and problem-solving skills • At least an Upper-Intermediate level of English • Experience with GraphQL WILL BE A PLUS • Understanding of high-load system optimizations in the E-commerce domain