Engineering Track Record
Documented delivery patterns from 15+ years in regulated environments. Architecture decisions, compliance constraints, and production outcomes.
HEALTHCARE PLATFORMS — 11+ YEARS
Mission-critical systems handling beneficiary records, exams, and hospitalizations. Zero tolerance for downtime or data exposure.
• Monolithic legacy stack (ASP Classic, WebForms, Delphi) causing maintenance debt → Refactored with SOLID/design patterns, then rebuilt core platform using DDD and Clean Architecture with decoupled WebAPI → Extended legacy lifespan during transition, enabled independent dev cycles, and eliminated structural bottlenecks without business interruption.
• Initial pentest exposed critical vulnerabilities (plaintext credentials, SQLi, weak session validation) → Implemented comprehensive remediation: parameterized queries, strict CORS, PGP 4096-bit encryption, RBAC + policy-based access, and immutable audit trails → Zero successful breaches in subsequent annual pentests; passed ISO 27001, LGPD, and GDPR audits without emergency patches.
• Fragmented operator layouts and manual data imports causing billing errors → Standardized ingestion via unified JSON schema, automated TISS-XML billing generation, and enforced data anonymization for non-production environments → Eliminated manual import failures, ensured cross-system data consistency, and maintained compliance-ready pipelines.
Tech: C#, .NET Core, ASP.NET WebAPI, SQL Server, Azure DevOps, React, Bootstrap, PGP, Azure WAF
Audited against: ISO 27001, LGPD, GDPR, TISS-XML, ANS, Enterprise security standards
Technical execution logs across regulated sectors
TELECOM OPERATIONS — 2 YEARS
High-volume subscription and provisioning systems where billing accuracy and revenue continuity are non-negotiable.
• Manual subscription workflows and payment fragmentation → Integrated recurring billing with standardized C# business logic and third-party gateway automation → Eliminated reconciliation gaps and ensured consistent revenue cycles.
• Inconsistent legacy UI across modules → Standardized interface using a reusable component framework with strict multi-tier separation → Accelerated delivery, reduced technical debt, and unified enterprise user experience.
• High-volume billing operations prone to data drift → Enforced controlled SQL stored procedures with multi-step validation and automated invoice generation → Maintained transactional integrity across peak loads and delivered audit-ready financial outputs.
Tech: ASP.NET Web Forms, SQL Server, DevExpress, Payment Gateway APIs, Visual Studio
Standards: Revenue-critical uptime, multi-tier architecture, component-driven UI, strict data validation
INSURANCE & CLAIMS SYSTEMS — 1 YEAR
Regulated enterprise platforms handling policy lifecycles, carrier integrations, and compliance-driven workflows. Focus on system modeling, process traceability, and technical-business alignment.
• Fragmented business processes and unclear system boundaries → Mapped end-to-end workflows using UML (activity, sequence, class diagrams) and reverse-engineered legacy behavior → Delivered clear architectural blueprints, aligned stakeholders, and established compliance-ready traceability.
• Unstructured operational handoffs and audit gaps → Documented as-is processes, mapped cross-module data flows, and defined state-transition rules → Reduced integration friction, enabled predictable carrier reconciliation, and created a documentation baseline for future system evolution.
• Stakeholder misalignment on system capabilities → Facilitated collaborative modeling sessions, standardized documentation artifacts, and enforced version-controlled workflows → Ensured shared technical understanding, accelerated requirement validation, and established practices that scaled into later architectural leadership.
Tech: J2EE, JSP, Relational Databases, Enterprise Architect (UML), Visual SourceSafe
Standards: Regulated process traceability, audit-ready documentation, multi-tier separation of concerns, version-controlled environments
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FM ByteShift Software — CNPJ: 62.145.022/0001-05