Luiz Fernando

Remote

• Used a full AI workflow with Claude, Cursor, and Codex from discovery to production, including requirement shaping, spec drafting, implementation, review, and release readiness.
• Made targeted backend adjustments with an AI assistant to help the team diagnose issues faster and unblock delivery.
• Improved onboarding conversion by designing and shipping new pages and UX upgrades in onboarding flows that had been largely untouched for more than five years.
• Owned and maintained critical onboarding journeys from sign-in through post sign-in, including identity, compliance, and policy-driven user states.
• Built and scaled Storybook-based Unified Onboarding documentation and scenario coverage, with reusable stories for success, error, regional, and compliance variants to reduce regressions and speed delivery.

Remote

• Worked directly with product and stakeholders to plan and architect MoneyGram's non-custodial wallet: activation, custody, KYC, and USDC ramps for remittance and digital asset use cases.
• Shipped activation and custody on multi-signature wallets, with a backend that signs and pays for transactions so remittance users can move USDC under a non-custodial model.
• Built KYC guardrails into activation and transfers to block bad actors before they reach the wallet or the ramps.
• Delivered USDC on-ramp and off-ramp through Stellar Anchors, covering settlement edge cases across fiat, USDC, and the chain.
• Researched onboarding and account workflows in Rust and Soroban to evaluate more secure and scalable designs for later platform capabilities.
• Coached engineers through pair and mob programming and kept implementation order aligned with the stakeholder roadmap.

Sao Paulo, Brazil (Hybrid)

• Led development of Zaia's B2B model, the operating model the company still executes: businesses create and run their own agents on the platform.
• Led the agent platform where a user creates an agent, selects a model, and adds data to the RAG pipeline by embedding it and storing it in a vector database.
• Connected agents to WhatsApp Business, Instagram, Make, Manychat, and e-commerce platforms so one agent can operate in the channels a business already uses.
• Integrated ElevenLabs so agents can respond in audio and in text.
• Built the streaming response architecture that replaced the previous WebSocket approach, so clients render a reply as it is produced.
• Built the backend and the frontend on Bun, with ElysiaJS for type-safe API contracts, and evolved the React, Vite, and React Native clients with product and design.

Remote

• Contributed to the Fuel open-source wallet while the protocol and the developer surface were both still moving, using React, TypeScript, GraphQL, Playwright, and Jest.
• Tightened design-system components so wallet connection and transaction flows shared one interaction model.
• Clarified Fuel TypeScript SDK paths for talking to a Fuel node, the main friction for developers integrating from outside the core team.
• Strengthened automated coverage around transaction flows so regressions surfaced before release.

Remote

• Led the team that built Jump DeFi, a decentralized exchange on NEAR, including the React trading interface, Node.js services, and Rust contracts for wallet connection, swaps, and transaction feedback.
• Built the AMM with staff reviewers who checked the contracts for vulnerabilities and audited them before launch.
• Built the swap router that executes swaps across market contracts when liquidity is split between pools.
• Built the staking and launchpad mechanism: users stake and receive launchpad tickets they can use for new listings.
• Led estimation, prioritization, and communication between product and engineering through launch.

Remote

• Built internal team-building and roadmap tools with React, TypeScript, Node.js, GraphQL, and Go for organization-wide planning needs.
• Delivered release-planning visibility across products including Valorant, TFT, and League of Legends through robust internal platforms.
• Shipped user-facing and internal workflows focused on clarity, reliability, and predictable cross-team collaboration.
• Partnered with cross-functional stakeholders to align delivery plans, technical scope, and product objectives.

Remote

• Delivered production-ready software for international clients, including Riot Games, in highly distributed team environments.
• Contributed across frontend and backend stacks using React, Node.js, GraphQL, and Go depending on client and product needs.
• Worked effectively across multiple time zones with strong async communication and clear ownership of deliverables.
• Maintained high quality standards through collaborative reviews, iterative releases, and structured problem solving.

Sao Paulo, Brazil

• Led engineering for educational financing and course-purchase platforms with direct impact on acquisition and conversion journeys.
• Built credit application and checkout flows with TypeScript, Node.js, React, and PostgreSQL for reliable end-to-end operations.
• Improved product usability and flow consistency by collaborating closely with product and design stakeholders.
• Mentored engineers through planning, technical guidance, and structured code reviews to improve team output and confidence.

Sao Paulo, Brazil

• Developed fintech back-office systems for payment reconciliation in benefits-card operations with high operational accuracy needs.
• Built digital banking mobile features with React Native, including balances, wire transfers, and payment experiences.
• Created shared component libraries for React and React Native to standardize implementation across products.
• Built utility libraries for JavaScript and TypeScript to reduce duplicated logic and improve maintainability.

Remote

• Built Sense Chat, a blockchain messaging app on EOS, with React Native, WebRTC, EOS JS, and TypeScript.
• Protected message contents with elliptic-curve encryption on a public account ledger.
• Shipped chat and WebRTC calls where key handling and delivery reliability had to work as one flow.
• Iterated the chat experience under encryption and decentralized delivery constraints.

Sao Paulo, Brazil

• Built scalable web applications with Node.js, React, and GraphQL for startup and enterprise use cases.
• Developed backend queue automation with Node.js, Puppeteer, and Flow for high-volume operational processing.
• Created a React and TypeScript analytics client for App Store and Google Play review insights.
• Helped improve performance and observability of data-heavy workflows used by product teams.

Sao Paulo, Brazil

• Developed event and hackathon platform features with React, Flow, Apollo, and Node.js.
• Shipped product capabilities on top of a mixed modern and legacy architecture.
• Supported a legacy C# .NET Core backend while maintaining feature delivery velocity.
• Maintained compatibility and performance across older services and newer platform modules.

Sao Paulo, Brazil

• Built enterprise web and mobile products with React Native, GraphQL, Node.js, and Relay.
• Delivered a Natura sales-force application and an airline ticketing mobile app with TypeScript, Redux, and Redux-Saga.
• Contributed to a feedback and 360-degree analysis platform used by HR teams for performance processes.
• Worked across multiple client projects, adapting quickly to different domains and technical constraints.

Sao Paulo, Brazil

• Built internal web applications with C# .NET and SQL Server for logistics operations and internal business workflows.
• Migrated legacy VBA applications to modern C# architecture, improving maintainability, reliability, and long-term scalability.
• Automated manual workflows to reduce spreadsheet-heavy processes and increase operational efficiency.
• Collaborated directly with business teams to translate operational pain points into practical software solutions.

Sao Paulo, Brazil

• Administered Linux servers and supported daily infrastructure operations in an enterprise environment.
• Automated recurring operational tasks with shell scripting to reduce manual intervention.
• Helped operate network traffic monitoring systems and support service reliability efforts.
• Developed foundational systems knowledge in administration, permissions, troubleshooting, and automation.

Sao Paulo, Brazil

• Provided technical support for internal users, systems, and workstation/software issues.
• Managed account and access requests and supported day-to-day internal IT operations.
• Resolved connectivity and environment issues with focus on clear communication and user support quality.
• Built a strong foundation in enterprise support, troubleshooting, and problem-solving discipline.