Middle Full Stack Engineer (Frontend Focus)

Are you a Middle Full Stack Engineer passionate about building high-performance, scalable systems? Join our team at Sigma Software, where we create cutting-edge solutions for a leading online marketplace in the pet products domain.
This is an opportunity to work on a high-load, distributed platform that connects millions of pet owners with suppliers worldwide. The role offers flexibility in work format — remote, onsite, or hybrid — to suit your lifestyle.
At Sigma Software, we value innovation, quality, and teamwork. You will be part of a collaborative environment with access to challenging projects, modern technologies, and professional growth opportunities.
CUSTOMER
Our client is a leading online marketplace specializing in pet products. The platform connects pet owners with suppliers offering food, accessories, and healthcare products. Known for its intuitive interface and strong logistics network, the company is committed to enhancing the pet care experience through technology.
PROJECT
We are developing a high-performance, scalable customer-related platform capable of processing substantial data volumes with low latency and fault tolerance. The solution leverages Java, Spring, AWS services, and React to deliver a reliable and engaging user experience for pet owners and suppliers.
Design, develop, and implement large-scale distributed systems to ensure scalability, low latency, and fault tolerance
Develop and maintain front-end features using React JS, ensuring responsiveness and usability
Implement APIs and event-driven solutions to meet system requirements and enhance functionality
Create and execute unit tests, API tests, regression tests, and performance tests to ensure reliability and efficiency
Optimize solutions for scalability, reliability, and high performance across both front-end and back-end components
Collaborate closely with cross-functional teams to address and resolve production incidents promptly
Participate in architectural discussions and contribute to technical documentation
At least 4 years of experience in software development with JavaScript and object-oriented programming
Strong experience with frontend frameworks such as React JS
Working experience with Java in production environments
Strong understanding of OOP principles, design patterns, algorithms, and data structures
Experience in building multi-tier web applications and REST APIs
Hands-on experience in Linux/Unix environments
Practical knowledge of cloud platforms (AWS, Google Cloud, or Azure)
Familiarity with relational and NoSQL databases (HBase, Cassandra, MongoDB, Redshift)
Bachelor’s or Master’s degree in Computer Science, Engineering, or related field
WILL BE A PLUS
Experience with microservices architecture
Knowledge of CI/CD pipelines and DevOps practices
Familiarity with containerization tools (Docker, Kubernetes)
PERSONAL PROFILE
Strong problem-solving skills and analytical thinking
Ability to work effectively in a team and communicate clearly
Passion for building high-quality, scalable software solutions