Looking to build large-scale E-commerce solutions used by millions of customers? We are seeking a Senior Full Stack Developer with strong Python and React expertise to join a high-impact project for a leading pet products marketplace. This is a full-time remote opportunity based in Brazil.
We at Sigma Software create innovative digital products that combine scalability, performance, and outstanding user experience. In this role, you will collaborate with experienced engineers and cross-functional teams to develop modern distributed systems and customer-focused web applications.
Why join us? You will work with modern technologies, influence architectural decisions, and contribute directly to the growth of a large-scale E-commerce platform while enjoying flexible work conditions and professional development opportunities.
CUSTOMER
Our Customer is a leading marketplace specializing in pet products with a strong online presence and a large-scale digital commerce ecosystem. The company offers an extensive catalog of products for pet owners, including food, accessories, and healthcare solutions. Focused on customer satisfaction and innovation, the organization continues to expand its E-commerce capabilities to deliver seamless shopping experiences to millions of users.
PROJECT
The project focuses on developing a scalable and high-performance E-commerce platform for a major pet products marketplace. The solution is designed to support millions of customers while ensuring reliability, low latency, and fault tolerance across distributed systems. The team is building modern backend services, event-driven architectures, and responsive frontend applications to enhance customer experience and support business growth.
Key Technologies: Python, React, REST APIs, GraphQL, AWS, Google Cloud, Azure, Linux, MongoDB, Cassandra, HBase, Redshift, Microservices
Job Description- Design, develop, and implement large-scale distributed systems capable of handling substantial data volumes
- Build scalable backend services and microservices using Python
- Develop and integrate REST and GraphQL APIs
- Create responsive frontend functionality using React
- Implement event-driven solutions to improve scalability and system performance
- Develop and execute unit, API, regression, and performance tests
- Optimize applications for scalability, reliability, and low latency
- Collaborate with cross-functional teams to troubleshoot and resolve production incidents
- Contribute to architecture discussions and technical decision-making processes
- 5+ years of software development experience with object-oriented programming languages, including Python
- Strong backend development experience with Python
- Experience building scalable distributed systems and microservices
- Practical experience with REST and GraphQL APIs
- Strong understanding of OOP principles, design patterns, algorithms, and data structures
- Commercial experience with React
- Hands-on experience working in Linux/Unix environments
- Experience with cloud platforms such as AWS, Google Cloud, or Azure
- Familiarity with relational and NoSQL databases including HBase, Cassandra, MongoDB, and Redshift
- Ability to work independently and collaboratively in distributed teams
- Upper-Intermediate English level or higher
WILL BE A PLUS
- Experience with high-load E-commerce platforms
- Knowledge of event-driven architecture patterns
- Experience with performance optimization and observability tools
- Familiarity with CI/CD pipelines and DevOps practices
- Experience supporting production environments with high availability requirements
PERSONAL PROFILE
- Strong problem-solving mindset
- Ownership and accountability
- Proactive communication skills
- Ability to work in fast-paced environments
- Team-oriented attitude with collaborative mindset
Skills Required
- 5+ years software development experience with object-oriented languages, including Python
- Strong backend development experience with Python
- Experience building scalable distributed systems and microservices
- Practical experience with REST and GraphQL APIs
- Strong understanding of OOP principles, design patterns, algorithms, and data structures
- Commercial experience with React
- Hands-on experience working in Linux/Unix environments
- Experience with cloud platforms such as AWS, Google Cloud, or Azure
- Familiarity with relational and NoSQL databases including HBase, Cassandra, MongoDB, and Redshift
- Ability to work independently and collaboratively in distributed teams
- Upper-Intermediate English level or higher
- Experience with high-load E-commerce platforms
- Knowledge of event-driven architecture patterns
- Experience with performance optimization and observability tools
- Familiarity with CI/CD pipelines and DevOps practices
- Experience supporting production environments with high availability requirements
What We Do
Sigma Software Group, an award-winning and trusted IT partner, has been serving customers for over 21 years, providing comprehensive IT solutions to various businesses, ranging from startups to established software product houses. As one of Europe's substantial IT consultancies, it brings together a dedicated workforce of over 2,100 professionals in 40 offices across 19 countries. With a diverse client base, including more than 300 enterprises, including Fortune 500 stalwarts, Sigma Software Group is a preferred choice for developing solutions that help businesses create cutting-edge products while meeting their unique needs. Sigma Software Group operates as a dynamic ecosystem of tech companies, offering 25 ready-to-implement innovative products and 40+ value-added services. Furthermore, Sigma Software Group is committed to fostering innovation through initiatives such as the Sigma Software Labs business incubator, Sigma Software University, the SID Venture Partners VC Fund, UA Tech Network, Techosystem, the European Business Association, and other collaborative efforts. Since 2015, Sigma Software Group has consistently earned recognition on the IAOP's prestigious World's Top 100 Outsourcing list. The company's accomplishments have also been acknowledged by prominent global media outlets such as Forbes, CNBC, The Times, and Reuters
