Python Developer (Mid-Level)

Description

If you're looking to transform your career and join a team that values innovation, collaboration, and continuous development, this is the perfect opportunity! We are seeking professionals who bring experience, passion, and a strong desire to grow. If you have knowledge of the dynamics and particularities of the Retail, POS (Point of Sale), and Food Service sectors, now is your time to shine. We seek an analytical, proactive individual capable of independently resolving complex technical problems, collaborating directly with product, support, and infrastructure teams. If you enjoy diving deep into customer issues, negotiating solutions with developers, and ensuring company-wide alignment, this role is for you. **Responsibilities and duties** * Maintain the self-service system, ensuring stability and high availability * Investigate and resolve complex technical issues in production * Implement performance improvements and optimizations in frontend and backend * Develop and evolve new features according to the product roadmap * Integrate and maintain REST APIs * Work with queues and topics for asynchronous processing * Perform database maintenance and optimization (SQL and SQLite) * Collaborate with product, QA, and support teams to identify and resolve incidents * Ensure adherence to development best practices, version control, and documentation * Participate in code reviews and technical discussions **Requirements and qualifications** * Experience with JavaScript (Frontend) and Python (Backend) * Experience with REST APIs, queues, and topics * SQL, SQLite * Experience with AI coding agents—such as Claude Code, OpenAI Codex, Cursor, or GitHub Copilot—to accelerate development, testing, debugging, refactoring, and code review, with technical validation via CI/CD **Additional information** **Benefits: caring for you and your growth** **Meal allowance**: BRL 704.00 per month **Life insurance**: fully covered by the company **Health insurance**: 70% covered by the company based on employee age; for dependents under the Health Plan, 100% paid by the employee, based on age **Dental insurance**: fully covered by the company **Transportation allowance (VT)**: provided as needed (deducted up to 6% of salary) **Birthday gift card** (freely usable balance). **Join a team that values your talent and potential in every way!** Come help transform restaurant service experiences across Brazil—with us. Together, we’ll build a future that’s even more digital, practical, and innovative! All our positions are open and inclusive for People with Disabilities (PCDs). **If this resonates with you, apply now and join our phenomenal team!** If you feel you don’t meet all the requirements for this position, we still encourage you to apply. We know that confidence gaps and imposter syndrome often prevent incredible people from pursuing their dream roles—and we don’t want that to happen to you. Founded in 2006, 3S Checkout is a Brazilian technology company specializing in developing innovative enterprise management solutions, with a focus on retail. With a highly qualified team, we offer services ranging from retail-tailored solutions to the development and maintenance of fully customized web and mobile solutions. We serve large-scale clients, delivering comprehensive and innovative solutions. Commitment and agility in serving our clients drive everything we do. Certified by Great Place to Work (GPTW), we focus on developing our employees and believe that innovative actions are driven by innovative people—collaborative thinkers, intellectually curious, and with an owner’s mindset. Join the digital transformation journey with 3S Checkout