Marcos Nespolo

Frontend → Full-Stack → Product Engineer

• Worked across the full product lifecycle: led discovery with enterprise clients, turned feedback into specs and roadmaps, wrote the customer-facing release notes for every product update, and shipped across the full stack — UI/UX, REST APIs, and database design
• Built and documented the platform's public APIs, ran onboarding calls with client dev teams, and facilitated agile ceremonies to align product and engineering
• Mentored developers on a platform that today serves 1,800+ customers and processes 80,000+ exchange and return requests per week as the segment leader in Brazil
• Shipped an end-to-end paid-pickup flow solo: Pagar.me integration creating charges on merchant accounts, Pix QR-code checkout, and asynchronous payment confirmation — from client discovery to production
• Built and deployed a natural-language-to-SQL analytics assistant as an internal tool: an LLM turns plain-language questions into read-only SQL over a multi-tenant Postgres schema, wrapped in a security layer (SELECT-only validation, mandatory org-scoping, ID-projection blocking, stacked-query prevention) and a self-correcting retry loop
• Built an LLM translation flow that, when a merchant enables a new language, automatically translates all of their existing custom content into it while preserving their original tone of voice

Stack: TypeScript · Next.js · React · Node.js · Supabase · PostgreSQL · Tailwind

Frontend Developer · Crypto trading platform

• Built the frontend for a new crypto trading product
• Kept latency low and the UI responsive in a trading system serving thousands of simultaneous users
• Shipped new features on a weekly basis, collaborating directly with UI/UX teams

Stack: JavaScript · Vue.js · SCSS · HTML5

3rd Sergeant, IT Section (last 3 years)

• Managed IT infrastructure for 3 years, administering Linux systems, virtual machines, and backup routines
• Built two internal systems (Django and PHP/MySQL) used daily to run headquarters operations
• Served as an instructor, helping train ~720 soldiers and 110 corporals in high-pressure environments

Stack: Linux · Django · PHP · MySQL · IT Infrastructure

Python Developer

• Built Python microservices for order tracking, integrating e-commerce APIs, ERPs, and shipping carriers
• Led the redesign of the company's visual identity, combining development and design skills

Stack: Python · Microservices · Design · REST APIs

Full-Stack Web Developer

• Contributed as a researcher and developer to AVIAO (Intelligent Virtual Environment for Guided Learning)
• Implemented dynamic AJAX-based interfaces, gaining early practical experience with UI ergonomics

Stack: JavaScript · jQuery · PHP · SQL · HTML5 · CSS3

Treasurer

Treasurer of the local club. Coordinated finances for community service projects.

Wwoofer

Two host stays: Hare Krishna community in Wellington (vegan kitchen) and a French family near Christchurch. Built a car-booking system for the temple.

Volunteer · Street fundraising day

One-day fundraising mobilization for TETO's housing programs.

Volunteer

Donations campaign for at-risk children at the Christian Association of Social Assistance, Curitiba.