Middle Full Stack Engineer (Frontend Focus)

SigmaSoftware2

Brazil, IN, United States Remote permanent

Posted: April 15, 2026

Job Description

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 a Senior-level 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.

Key Technologies: Java, Spring, AWS, React, Linux/Unix, relational & NoSQL databases

• Design, develop, and implement large-scale distributed systems capable of handling high data volumes
• Build scalable, low-latency, and fault-tolerant solutions
• Develop APIs and event-driven architectures to meet system requirements
• Implement unit, API, regression, and performance testing strategies
• Work with React for frontend development
• Optimize solutions for scalability, reliability, and high performance
• Collaborate with cross-functional teams to resolve production incidents quickly
• Participate in code reviews and contribute to continuous improvement of development processes

• At least 4 years of experience in software development with Java and object-oriented programming
• Strong understanding of OOP principles, design patterns, algorithms, and data structures
• Experience in building multi-tier web applications and REST APIs
• Experience with frontend frameworks such as React
• 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

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