João André Bolas Soares

SWORD Health

• Build and maintain backend systems in a microservice architecture serving web, iOS and Android clients through BFFs over REST and gRPC.
• Primary stack: Go (Gin, Gorm) and Node.js (Express, Knex), with MySQL and PostgreSQL.
• Engineered CI/CD pipelines on Google Kubernetes Engine with Jenkins and a custom internal platform, giving visibility and control over deployments across dozens of services.
• Designed and implemented a company-wide audit service for regulatory compliance and external audits, with end-to-end traceability of critical user actions and system events.
• Led the definition and adoption of a company-wide RFC process for JWT secret rotation, standardising security practice and removing manual intervention across all services.
• Built and deployed agentic workflows with LangChain, LangGraph and Mastra.ai, with Langfuse observability into agent interactions; developed AI-powered developer tooling (e.g. OpenCode) for spec-driven development.

Truphone

• Backend APIs in a microservices architecture using REST and the OpenAPI 3 specification.
• Multi-stack delivery: Java 11 (Spring, Maven, JUnit 5, Cucumber) and Go (Echo v4, Gorm) over SQL databases.
• Deployments to AWS (EKS) via GitLab CI multi-stage pipelines; Docker and Kubernetes.
• Service monitoring with Prometheus, Grafana and Graylog; K6 load tests on business-critical workflows.
• Test-driven development across unit tests, service E2E tests and network-level E2E tests.

Infinera

• Development and integration of modular, data-driven Angular 9 components using object-oriented programming and modern web concepts; API routes with NestJS.
• Test-driven development with high coverage in Jasmine and Karma, plus Protractor for E2E testing.
• CI/CD with pre-commit automation (TSLint, Stylelint, Prettier) and Jenkins build validation wired to SonarQube and PMD.
• C++ development with Google Test, including mathematical optical models, UI/UX and data management.

Siemens

• High-level requirement specification architecture with full traceability from contract to implementation for critical systems, including ERTMS.
• Designed testing requirements across several degrees of testing.
• Requirements design for railway signalling engineering projects.

University of Algarve

Thesis: Photovoltaic Power Forecast Modeling with Artificial Neural Networks — artificial neural networks, genetic algorithms, MATLAB and renewable energy.