Projects

1. HEALTHTECH

   End-to-end telemedicine platform

   Registration, scheduling, prescription, notification and billing as independent services, with admin, back-office and B2B portals plus physician and patient apps. Eleven services in production.

   NestJS Kong MongoDB React AWS EKS
2. GOVTECH

   Government selection-process SaaS

   The public body defines the form and criteria for each call and receives applications through the public channel, all the way to accountability reporting. 39k processes, 117k openings, a base of 2.1M candidates.

   NestJS MongoDB Next.js GCP
3. GOVTECH · LEGACY

   Modernizing a public platform under production

   An eight-year-old core with over 12k commits migrating piece by piece, with the legacy still serving while the new generation takes one route at a time behind a canary sampled per request — not per client.

   Express/MySQL → NestJS/MongoDB OpenTelemetry
4. HEALTHTECH · AI

   AI clinical triage — Manchester protocol

   A conversation with the patient applies the Manchester protocol adapted to telemedicine and classifies the case into four risk levels; severe cases reach the physician already prioritized.

   TypeScript Fastify AWS Bedrock Claude/GPT
5. EDTECH · AI

   AI-powered recruitment platform

   A matching engine ranks candidates by proximity, profile and job fit with auditable criteria, also exposed to AI agents via MCP. A base of more than 2M young people.

   Angular Node MySQL Vertex AI
6. AI · CALL CENTER

   Voice agent platform

   Prompts and conversation flows versioned in production; 100% of sessions analyzed for intent, friction and quality, raising bot self-resolution.

   Go Next.js pgvector RabbitMQ Asterisk
7. AI · ENGINEERING

   Specification completeness gate

   A model judges the issue against its category rubric, hunts the gaps the rubric misses and lists the questions an implementer would ask, before it becomes work. It warns and logs instead of blocking the queue. In development.

   Go pgvector Next.js
8. HEALTHTECH

   International B2C telemedicine

   Brazilians abroad consult Brazilian physicians and leave with a digital prescription; a three-language product with international payments, live in the US and Colombia.

   NestJS MongoDB React EBANX
9. HEALTHTECH

   Corporate B2B2C outpatient care

   Companies and health plans offer telemedicine to their members: each partner manages contracts, members and dependents in its own portal, loaded by integration or import.

   NestJS Express React PostgreSQL
10. HEALTHTECH · ML

    Demand forecasting for telemedicine

    Three models answer different parts of the phenomenon — trend, calendar and recent context — and an ensemble combines the forecasts, validated in temporal order rather than by random shuffling.

    Python Prophet XGBoost FastAPI
11. HEALTHTECH · ML

    Medical schedule optimization

    Sizes the minimum team per period against forecast demand, with a fixed charge per activated physician — that is what makes the solver concentrate the roster instead of spreading it.

    Python FastAPI OR-Tools
12. HEALTHTECH · PRIVACY

    Telepsychology platform

    Screening with validated clinical instruments and automatic referral of at-risk cases; HR only ever receives aggregate indicators, with a floor of five respondents to prevent re-identification.

    Next.js Postgres Jitsi
13. LOGISTICS

    Ocean shipment tracking

    Twelve carriers queried through the best available path, with an evidence trail per lookup and a drafted email to the client — never sent automatically. The first measurement found 7 of 8 arrival dates stale. Pilot.

    Python Playwright
14. FLEET

    Vehicle tracking CRM

    The commercial operation left the spreadsheet: automatic recurring billing, reconciled receivables and self-service sign-up on the site. 1,357 contracts migrated at cutover without interrupting billing.

    Next.js Postgres Stripe
15. INFRA

    Legacy ERP migration to AWS

    A finance, tax and payroll ERP moved from an on-premise server to the cloud, preserving the corporate directory and tax routines; cutover in a maintenance window with no tax-data loss.

    AWS EC2 VPN Site-to-Site SQL Server
16. EDUCATION

    Executive AI workshop

    From fundamentals to applied topics (LLM, RAG, ML, MLOps, MCP), grounding every concept in real problems of the operation; the board left able to prioritize opportunities on its own judgment.

Details at ansuz.dev.br/cases.