Leonardo Almeida
Software Engineering Specialist · Senior Fullstack Engineer · AI/LLM Practitioner
São Paulo, Brazil (remote) · eu@leunardo.dev · +55 11 93804-5313 · github.com/LeuAlmeida · linkedin.com/in/leonardoalmeida99
Professional summary
Senior software engineer with 9+ years building production systems in fullstack web, microservices, microfrontends and AI. Led critical patient-facing platforms at Hospital Israelita Albert Einstein (Design System, Authentication, Care Coordination, Virtual Reception, B2B) and built, solo, under Ansuz Software Lab, a catalog of products with six in production, plus consulting in healthtech, govtech and AI. Deep practitioner of TypeScript, Node.js and React, AWS and Cloudflare Workers, and the Anthropic Claude + LangChain + RAG + MCP stack. Active in Privacy-by-Design and LGPD/GDPR initiatives; mentor and trilingual.
Professional experience
- Built a catalog of 8 in-house products with full ownership (product, architecture, code, payments, growth), 6 in production: SinalPix (B2B, Pix-deposit scheduling), Vacina.Pet (B2B, AI-driven retention for pet clinics), Zaptura (B2B, outreach via Google Maps/CNPJ, WhatsApp and email), Rateei (B2C, bill splitting), Geniada (B2C, realtime multiplayer party quiz) and CalendarsIO (unifies Google/Microsoft calendars with a public booking page); TermosAI (AI-generated LGPD documents) and Banter (AI-driven English conversation practice) launching soon.
- Senior consulting and engineering under Ansuz: end-to-end telemedicine, government SaaS (39k selection processes, 2.1M candidates), AI clinical triage, voice agents and ML-based schedule optimization — anonymized cases at ansuz.dev.br/cases.
- Stack: TypeScript, TanStack, Next.js 15, Cloudflare Workers, Supabase, Stripe, GCP.
- Technical specialist for the strategic domains of Access, Registration, Care Coordination and Virtual Reception, focused on security, scalability and user experience.
- Led the institutional Design System (Zera DS), governance and standardization across digital products.
- Unified the authentication module across digital channels and rolled out 2FA on Digital.
- Privacy-by-Design; active member of the Privacy Champions guild; contributed to the digital patient platform's international URAC accreditation.
- Bridge between engineering and product teams; led critical fronts with direct impact on the patient journey.
- Architecture definition, initiative prioritization and mentoring of technical leadership.
- Technical leadership of the B2B platform: re-architected legacy APIs into microservices and migrated interfaces to microfrontends, turning the platform into a SaaS product.
- Technical management of virtual care teams and internal/external channels; microservices, microfrontends, SQL/NoSQL, AWS, Kafka and serverless, with Scrum/Kanban.
- Mentored the 2023 and 2024 cohorts of the 1000Devs | Talentos para o Bem program, training new IT professionals.
- Modernization of legacy systems and development of new products with a full JavaScript stack (jQuery to React and Node.js), MongoDB, TypeScript and cloud.
- Progressed from intern to developer over 4 years; educational platforms (Plone, ReactJS, Node.js, React Native) and email/SMS marketing campaigns.
Skills
AI/LLM: Anthropic Claude API, LangChain, RAG, MCP, AI Agents, LLMOps, Prompt Engineering, LangSmith, n8n, Python
Frontend: TypeScript, React, Next.js 15, TanStack, React Native, Microfrontends, HTML5/CSS
Backend: Node.js, NestJS, REST APIs, Microservices, Serverless, Kafka, RabbitMQ, Redis, TDD
Data: PostgreSQL, MySQL, MongoDB, Supabase, NoSQL
Cloud/Infra: AWS (Fargate, Lambda, API Gateway), Cloudflare Workers, GCP, Docker, IaC, Grafana
Compliance: LGPD, GDPR, Privacy by Design, Digital Law, URAC (healthcare)
Leadership: Technical leadership, engineering management, mentoring, stakeholder management
Education
- Postgraduate in Artificial Intelligence & Data Science — Universidade Anhembi Morumbi (May 2025 – Jun 2026, in progress)
- Postgraduate in General Data Protection Law (LGPD) — Legale Educacional (Aug 2025 – Feb 2026, in progress)
- Bachelor's in Advertising and Marketing — Universidade Metodista de São Paulo (2017 – 2021)
- GoStack 10 Bootcamp — Fullstack Development — Rocketseat (2019 – 2020)
- Agile Software Development Bootcamp — IGTI (2021)
Certifications
- AI Applications with LangChain (Prompt Templates, Output Parsers, LCEL, LangSmith) — Asimov Academy, Jul 2025
- Mission AI: Intelligent Automations with AI (MCP, RAG, n8n, AI Agents) — Faculdade de Tecnologia Rocketseat, Jun 2025
- Generative AI in Action: Real-World Use Cases (RAG, LLMOps) — Amazon Web Services, Jun 2025
- Scalable Microservices Challenge with Node.js (IaC, Grafana, RabbitMQ, AWS Fargate) — Faculdade de Tecnologia Rocketseat, Jun 2025
- Docker — Full Cycle, Jun 2022
- Bootcamp GoStack (Docker, Node.js) — Rocketseat, Jun 2020
Languages
Portuguese (native) · English (fluent) · Spanish (intermediate)