Senior Fullstack Developer (Python + React)

**About The Company** Avenue Code is the leading software consultancy focused on delivering end\-to\-end development solutions for digital transformation across every vertical. We’re privately held, profitable, and have been on a solid growth trajectory since day one. We care deeply about our clients, our partners, and our people. We prefer the word ‘partner’ over ‘vendor’, and our investment in professional relationships is a reflection of that philosophy. We pride ourselves on our technical acumen, our collaborative problem\-solving ability, and the warm professionalism of our teams. **About The Opportunity** We're seeking an experienced Senior Full Stack Developer to join our Supply Chain \& Operations technology team. This is a high\-impact role focused on rapid application development for business\-critical systems that power clients' global supply chain, logistics, and operational excellence. You'll work embedded within a dynamic, hybrid team of internal engineers and external collaborators, collaborating closely with business stakeholders, UX designers, and technical leads to deliver full\-stack solutions that solve real operational challenges. This role requires someone who goes beyond just writing code; you'll need to understand user needs, contribute to requirements analysis, and bring strong product thinking to ensure we're building the right solutions. **Responsibilities** * Design and develop full\-stack web applications using **React/TypeScript and JavaScript (frontend) and Python/FastAPI (backend)** to address operational challenges in supply chain, logistics, and planning systems. * Build and optimize solutions for large\-scale relational datasets with MySQL or PostgreSQL, ensuring query performance and data integrity. * Deploy and maintain containerized applications on Kubernetes, implementing infrastructure updates, connectivity enhancements, and cloud platform improvements. * Integrate with third\-party systems, external APIs, workflow platforms, and enterprise services (IAM, authentication, etc.) while upholding security and privacy standards. * Apply DevSecOps practices throughout the development lifecycle, focusing on security by design, automated testing, and quality gates. * Support and maintain production systems, including triaging and resolving bugs, implementing enhancements, and executing planned infrastructure upgrades. **Required Qualifications** * Excellent English communication skills (written and verbal) * Proven capabilities in backend development, focusing on **Python with FastAPI in the backend** , including RESTful API design and asynchronous programming patterns * Advanced proficiency in **React and TypeScript for modern frontend development,** Single Page Applications (SPA), including state management, performance optimization, and accessible UI design * Expertise in Vue.js, PHP/Symfony, and databases ( **MySQL** or PostgreSQL). * Disciplined approach to code quality and testing (unit, integration, end\-to\-end) with experience in Git *Avenue Code reinforces its commitment to privacy and to all the principles guaranteed by the most accurate global data protection laws, such as GDPR, LGPD, CCPA and CPRA. The Candidate data shared with Avenue Code will be kept confidential and will not be transmitted to disinterested third parties, nor will it be used for purposes other than the application for open positions. As a Consultancy company, Avenue Code may share your information with its clients and other Companies from the CompassUol Group to which Avenue Code’s consultants are allocated to perform its services.*