> Markdown version of [/jobs/ext/1155888-full-stack-developer](https://www.wearedevelopers.com/jobs/ext/1155888-full-stack-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Developer - **Company:** The Customer Company - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Unit Testing, Microsoft Azure, Cloud Computing, Data Structures, Software Design Patterns, Web Development, Distributed Systems, Fault Tolerance, Apache HBase, MongoDB, NoSQL, Object-Oriented Software Development, Regression Testing, Software Engineering, Software Requirements Analysis, Web Applications, Google Cloud, ReactJS, Event Driven Architecture, Containerization, Kubernetes, Low Latency, Cassandra, Graphql, Front End Software Development, Restful APIs, Docker, Amazon Redshift - **Published:** July 1, 2026 - **Apply:** https://career.sigma.software/vacancy/senior-full-stack-developer-27/ ## About the Role Java / strong React / strong REST API / strong GraphQL / good English / strong, * 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 WILL BE A PLUS: * Experience with GraphQL * Understanding of high-load system optimizations in the E-commerce domain, * Excellent communication skills and the ability to work with cross-functional teams * Strong collaborative mindset and proactive approach to task ownership ## Description Are you a Senior Full Stack Developer who thrives on building scalable, high-performance systems? Join us at Sigma Software and contribute to a cutting-edge platform for a leading pet products marketplace - a solution designed to serve millions of customers and transform the way pet owners shop online. In this role, you will be part of a skilled, collaborative team working with modern technologies to create a robust, customer-focused product that stands out in the e-commerce space. Why join us? You'll be working on a high-impact project where your ideas and technical decisions will directly influence product success and user experience. Customer Our Customer is an industry-leading marketplace specializing in pet products, boasting an extensive online presence and a massive product catalog. Project The project focuses on the development and optimization of a cutting-edge, high-performance marketplace platform designed to transform the online shopping experience. You will join the team, which develops and maintains core systems for managing catalogs, pricing, and inventory. This team ensures accurate tracking of items and services (like drugs, suppliers, and tests) as well as current and incoming stock, building scalable, large-scale distributed systems that handle substantial data volumes with low latency and robust fault tolerance. Key Technologies: Java, React, REST APIs, Distributed Systems, Event-Driven Architecture, HBase, Cassandra, MongoDB, Redshift, AWS, Google Cloud, Azure, * 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 ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) ## Related Articles - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Fullstack developer salary in Germany [2023]](https://www.wearedevelopers.com/magazine/197-fullstack-developer-salary-in-germany-2023) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe)