Jefferson Mañale
Software Engineer
Software Engineer specializing in scalable C#/.NET backend systems and multi-tenant cloud architectures. I own the end-to-end delivery lifecycle—from system design and CI/CD to observability and production support. By leveraging agentic AI and AI-assisted workflows, I act as a force multiplier for my team, accelerating how we build, debug, and ship highly reliable software.
Skills
Key skills that define my professional identity.
C#
Primary language for building robust, maintainable backend services and enterprise applications.
.NET 8 / 10
Build and migrate high-performance applications across modern .NET, including .NET Core and the .NET Framework.
ASP.NET Core
Design and ship scalable web applications and MVC solutions with a focus on performance and reliability.
REST APIs
Design and optimize RESTful endpoints with solid authentication, error handling, and data throughput.
SQL Server
Model relational databases and write tuned queries, stored procedures, and indexes for fast data access.
Git
Daily version control with branching strategies and code reviews across collaborative teams.
Experience
Professional journey and career timeline.
Own end-to-end delivery of complex features and critical production fixes across 18 repositories (8 web applications and 10 backend services covering users, requests, integrations, configuration, documents, file scanning, and more) in the AWS Enterprise Service Requests (ESR) ecosystem, a multi-tenant enterprise SaaS platform where a defect reaches end users and back-office staff alike.
C# Developer
Led a team of 5 remote backend developers on a US-based, AI-powered cybersecurity SaaS platform, owning sprint planning, code review, and architecture decisions across the backend.
Software Developer I - Full Stack
Built scalable web services with ASP.NET Core and WCF, integrating legacy SOAP endpoints with newer REST consumers and boosting overall system performance by 30%.
Projects
Showcasing impactful projects and technical achievements.
Vendor Integration Platform
Led five remote backend developers integrating 90+ security vendor APIs into an AI recommendation engine — where the hard problem is not any single integration, but keeping the system correct while some fraction of ninety upstreams is always degraded.
Billing Export Performance Rebuild
Restructured a row-by-row export pipeline in an enterprise billing system into a single set-based stored-procedure call, taking a routine 15-second operation to 0.135 seconds — a 99.1% reduction achieved by deleting thousands of database round trips rather than by tuning any one of them.