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Willian OliveiraWO
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Willian Oliveira

@willianoliveira

I build scalable full-stack and AI-powered software, modernizing systems and accelerating engineering delivery.

Brazil
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What I'm looking for

I'm focused on building production AI-powered software and agentic workflows, while shaping architecture, improving engineering processes, mentoring developers, and translating complex product requirements into scalable systems.

At Zipdev, I built backend and frontend LMS capabilities and architected AI workflows for student risk analysis, quiz generation, and course creation. I reduced average delivery time from about 35 days to 7 days by redesigning the engineering workflow and clarifying team ownership.

I've designed architectures, APIs, integrations, cloud infrastructure, and legacy modernization across Tok&Stok, Deliver IT, UOL EdTech, Moove, Kaizen, Zipernet, and Reweb. I'm focused on production AI systems using OpenAI, Anthropic, and Gemini APIs, while mentoring developers and turning complex product requirements into practical software.

Experience

Work history, roles, and key accomplishments

ZI

Senior Full Stack Developer

Zipdev

Jul 2022 - Aug 2026 (4 years 1 month)

Designed and implemented backend and frontend functionality across the LMS, architected AI-powered capabilities, and integrated LLM-powered functionality for student risk analysis and AI-assisted course creation. Reduced average delivery time from approximately 35 days to 7 days and mentored junior developers.

TO

Software Architect / Full Stack Developer

Tok&Stok

Sep 2021 - Jan 2022 (4 months)

Defined and reviewed technical architectures across multiple software projects, established development standards and reusable architectural patterns, and designed and maintained project boilerplates and templates. Worked on modernization and refactoring of legacy systems and contributed to CI/CD and infrastructure automation.

DI

Full Stack Node.js Developer / Systems Analyst

Deliver IT

Jun 2021 - Aug 2021 (2 months)

Developed backend services for an ATM event-log visualization and auditing platform, built functionality to help identify system changes and events associated with ATM failures and downtime, and developed Node.js/TypeScript services and integrations. Worked with asynchronous messaging and distributed system components.

UE

Full Stack PHP Developer

UOL EdTech

Aug 2020 - Jun 2021 (10 months)

Developed and maintained backend functionality for a high-traffic e-commerce and checkout environment, implemented new product features using PHP, Laravel, and Lumen, and improved checkout user experience. Designed and implemented integrations with external services and internal applications.

MO

Full Stack Developer / Technical Lead

Moove

May 2018 - Jul 2020 (2 years 2 months)

Led the development of the company's web engineering initiatives and coordinated technical work across the development team. Designed and implemented internal communication systems and digital products, established development processes and technical standards, and designed and implemented AWS infrastructure supporting multiple digital projects.

KA

Full Stack Developer

Kaizen

Nov 2017 - Apr 2018 (5 months)

Developed a website-generation platform integrated with the company's CRM, built and maintained websites and e-commerce systems, and developed integrations with external services. Participated in maintenance and modernization of existing applications.

ZI

Junior Full Stack Developer

Zipernet

Mar 2015 - Oct 2017 (2 years 7 months)

Developed and maintained ERP functionality and supporting services, built a real-time notification system using Node.js and Socket.IO, and developed customized enterprise solutions based on client requirements. Optimized application modules and database operations and provided technical support for production issues.

RE

Junior Full Stack Developer

Reweb

Jan 2014 - Feb 2015 (1 year 1 month)

Developed bug fixes and application improvements, assisted with software quality analysis and bug identification, and implemented integrations with third-party services. Supported ongoing maintenance of the CRM platform.

Education

Degrees, certifications, and relevant coursework

University of Vale do Rio dos Sinos logoUS

University of Vale do Rio dos Sinos

Computer Systems Information, Computer Systems Information

Studied Computer Systems Information at the University of Vale do Rio dos Sinos (UNISINOS).

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