Company Overview: Lean Tech is a rapidly expanding organization our headquarters are located in Medellín, Colombia. We pride ourselves on possessing one of the most influential networks within software development and IT services for the entertainment, financial, and logistics sectors. Our corporate projections offer a multitude of opportunities for professionals to elevate their careers and experience substantial growth. Joining our team means engaging with expansive engineering teams across Latin America and the United States, contributing to cutting-edge developments in multiple industries. Role Overview We are seeking a talented Sr Full Stack Developer with strong experience in TypeScript, Node.js, and React to build and maintain scalable web applications. This role involves developing robust backend services, creating responsive frontend interfaces, and working with relational databases to deliver high-quality, end-to-end solutions. The ideal candidate is comfortable working across the stack and has a solid foundation in modern software development practices. Remote role in LATAM Required Qualifications (Main skills) - 5+ years of proven experience in backend development with Node.js and TypeScript - 3+ years of Experience building modern frontend applications with React.js - Strong understanding of relational databases (e.g., PostgreSQL, MySQL, SQL Server) - Experience designing and consuming REST APIs - Solid understanding of software development principles and best practices - Familiarity with version control systems such as Git - Familiarity with AI-assisted development tools (e.g., code generation, testing assistants, or similar technologies) Nice to Have - Experience with RPA processes and integration of third party applications. - Experience with ETL transformation Data processes. Key Skills & Competencies - Ability to work as an independent contributor with minimal supervision - Strong communication skills, both technical and non-technical - Excellent problem-solving and debugging abilities - High attention to detail and commitment to quality - Strong organizational and time management skills - Adaptability and a proactive, solution-oriented mindset Why you will love Lean Tech: - Join a powerful tech workforce and help us change the world through technology - Professional development opportunities with international customers - Collaborative work environment - Career path and mentorship programs that will lead to new levels. Join Lean Tech and contribute to shaping the data landscape within a dynamic and growing organization. Your skills will be honed, and your contributions will play a vital role in our continued success. Lean Tech is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

• Perform software engineering activities in all layers of the stack, from setting up the database to programming in the back-end and the appearance at the front-end. • Work on problems of diverse scope and complexity ranging from moderate to substantial. • Advise executives to develop functional strategies (often segment specific) on matters of significance. • Exercise independent judgment and decision making on complex issues regarding job duties and related tasks. • Lead technical architecture and design and present vision. • Partner with senior business and functional leaders to define technical direction. • Deliver business-critical systems and components with high quality and on time. • Lead by example by doing hands-on platform, backend, and frontend development. • Review pull requests and provide constructive feedback. • Investigate and propose new ideas, frameworks, technologies, or processes.

• Lead technical architecture and design and present vision • Problem-solving expertise using advanced data structures and algorithms • Possess the ability to evaluate problems in both strategic and tactical terms • Lead a small team of high-caliber engineers by mentoring and coaching • Senior positive change with technical vision and innovative solutions • Strong affinity to software-driven engineering & automation • Partner with senior business and functional leaders to define technical direction • Deliver business-critical systems and components with high quality and on time • Lead by example by doing hands-on platform, backend, and frontend development • Review requests and provide constructive feedback • Investigate and propose new ideas, frameworks technologies, or processes

• Own end-to-end features in Cart & Checkout, collaborating with Product, Design, Data, and partner engineering teams to define scope, architecture, and rollout plans. • Design and implement full-stack solutions using technologies like TypeScript, React/Next.js, Tailwind, AWS Lambdas, DynamoDB, Redis, and modern CI/CD workflows. • Lead technical design for high-impact initiatives in areas such as: • Global checkout flows (multi-currency, taxation, shipping, localized UX). • Fraud and risk controls that protect customers and the business. • Enabling buying pathways in ever-expanding sales channels • Champion quality and operational excellence: • Write well-tested, well-documented code. • Instrument monitoring, logging, and alerting for new features. • Plan safe rollouts with feature flags, A/B tests, and clear rollback strategies. • Shepherd work from idea to stable production: • Drive technical discovery and spike work when requirements are ambiguous. • Collaborate with QA and SRE to ensure readiness for peak events (launches, BFCM, campaigns). • Support on-call rotations by helping debug, fix, and prevent incidents in critical revenue paths. • Raise the bar for the team: • Mentor other engineers through design reviews, pairing, and thoughtful code review. • Help standardize patterns, documentation, and best practices as the team and codebase scale.