A .NET sample connecting container builds, Kubernetes configuration, and behavior-driven tests.
Source codeHi, I’m Armando.
Serious systems.
A little spark.
A senior C# / .NET engineer with 12+ years building enterprise software across healthcare, payments, insurance, and ERP. From Brazil, with curiosity.
Open to international remote opportunities
Practical builder.
12+years making
complex things work
complex things work
C# / .NET✳React & Angular✳SQL & data✳AWS & Docker✳Systems that work
01 / The work
Less talk.
More making.
Personal projects and merged contributions across eight open-source projects. A closer look at the engineering behind the work.
Pick a project. Explore how it works.
Preserving mount order during Swarm force updates, so unchanged configuration stays unchanged.
Merged pull requestA shared settlement decision for Horizon verification and payment reconciliation in StellarGate.
Merged pull requestA practical workflow for finding an author’s changed files and collecting the context needed for review.
Read the guideMore work. Same care for the details.
Six more merged contributions, from asynchronous edge cases to public APIs.
One toolchain, fewer surprises
A consistent package-manager workflow across local setup, CI, and Docker.
View merged contribution ↗A cache that knows its limits
Keeping cache bounds intact when an asynchronous refresh reinserts an evicted entry.
View merged contribution ↗No proof left stranded
Moving inconclusive proofs into the existing admin-review flow when no validators are available.
View merged contribution ↗Getting the backend moving again
Removing a duplicate authentication import that prevented payment routes from parsing.
View merged contribution ↗A more predictable CI pipeline
Pinning remote GitHub Actions to verified commit SHAs while preserving existing workflow behavior.
View merged contribution ↗Making coverage visible
A public API for assessed-but-not-scored protocols, separate from the live leaderboard.
View merged contribution ↗The visuals explain the code. Personal projects and contributions are labeled separately; full details and attribution are in each case study.
02 / Enterprise experience
Built for the
real world.
12+ years across clinical systems, financial transactions, insurance operations, and enterprise back offices.
The responsibilities. The decisions. The results.
01 / HEALTHCAREJAN 2022 — OCT 2026
Behavioral-health EHR
& practice management
Zoobook Systems LLC
Principal C# / .NET Full-Stack Engineer
United States · Remote · Contract completed after successful launch
Delivered clinical documentation, patient management, scheduling, provider, billing, claims, and reporting workflows across a behavioral-health SaaS platform.
- ~30%
- faster responses in selected API and data-access workflows
- ~40%
- less manual release activity through delivery automation
What I delivered
- Modernized API and data-access paths with async/await, EF Core, LINQ, and SQL tuning.
- Built React/TypeScript interfaces and ASP.NET Core APIs for data-intensive clinical and administrative workflows.
- Strengthened role-based authorization, audit logging, server-side validation, and application-level data protection.
- Improved integration resiliency with decoupled background jobs, retries, structured error handling, and production diagnostics.
- Standardized Docker-based delivery and automated test/release workflows with xUnit and Moq.
C# · .NET 6/8 · ASP.NET Core · React · EF Core · SQL Server / MySQL · AWS · Docker
02 / PAYMENTS2019 — 2021
Payment services
& microservices
Zūm Rails
Senior .NET Full-Stack Engineer
Montréal, Canada · Remote
Engineered payment services and Angular operations experiences spanning initiation, transaction status, account workflows, reconciliation, refunds, and reporting.
- ~25%
- improvement in selected response times through async processing, query tuning, fewer requests, and targeted caching
What I delivered
- Separated tightly coupled business capabilities into independently maintainable ASP.NET Core services.
- Designed idempotent processing, validation, retries, and exception handling to protect payment operations from duplicate transactions and transient failures.
- Connected Angular/TypeScript operations interfaces to payment and reporting services.
- Strengthened release quality with automated tests, structured logging, and cross-functional production support.
C# · .NET Core · ASP.NET Core · Angular · TypeScript · SQL · REST APIs · Microservices
03 / INSURANCEJUN 2016 — DEC 2018
Policy administration
& claims workflows
i4Pro
C# / .NET Full-Stack Engineer
São Paulo, Brazil
Delivered capabilities covering quotations, issuance, endorsements, claims registration, customer records, financial workflows, and operational reporting.
- ~25%
- less manual handling time in selected claims workflows
- ~35%
- less processing time for selected operational reports
What I delivered
- Automated validation and routing steps within claims workflows.
- Unified Angular/TypeScript workflows with C# Web API services and reusable domain/data-access components.
- Tuned SQL Server stored procedures, indexes, and reporting queries.
- Integrated external REST services and standardized validation, auditing, exception handling, and role-based access.
C# · .NET Framework · ASP.NET MVC / Web API · Angular · Entity Framework · SQL Server
04 / ENTERPRISE ERPJAN 2014 — MAY 2016
Enterprise management
& back-office systems
TOTVS
Software Engineer — Enterprise .NET / ERP
Belo Horizonte, Brazil
Built and maintained financial, accounting, administrative, and operational capabilities across the TOTVS RM product ecosystem.
- ~20%
- faster selected search, reporting, validation, and export operations through SQL optimization
What I delivered
- Refactored reusable business and data-access components in C#, Entity Framework, and SQL Server.
- Optimized SQL queries and stored procedures for data-intensive operations.
- Integrated REST/SOAP services and browser-based JavaScript/jQuery features with server-side .NET modules.
- Supported production releases, root-cause analysis, and incremental refactoring of legacy components.
C# · .NET Framework · ASP.NET · Entity Framework · SQL Server · JavaScript / jQuery · REST / SOAP
Selected outcomes are from my professional résumé and apply to the workflows described. Employer systems are separate from the public repositories and open-source contributions above.
03 / The person behind the code
I like the
tricky bits.
Armando Francisco Denardi
Brazil · Working across borders
The API that’s slow. The workflow that’s tangled. The integration that almost works.
I’m a senior C#/.NET and full-stack engineer with 12+ years across healthcare, payments, insurance, and ERP. I enjoy connecting the dots between backend systems, data, and the interfaces people use every day.
My approach is practical: understand the workflow, trace the problem, and leave the system easier to use and maintain.
C# & ASP.NET CoreReact & AngularSQL performanceDistributed systemsAWS & DockerReliable delivery
Want the full background? Download my résumé (PDF)A foundation in computer science
Faculdade de Computação e Informática da FAAP (FCI-FAAP)
Master’s Degree, 2012–2014 · Bachelor’s Degree, 2009–2012
04 / Something in mind?
Let’s build
something good.
Open to international remote opportunities
in .NET and full-stack engineering.