Jonathan Peris

Software Engineer

I architect and deliver high-impact, enterprise-grade software with .NET, Azure, and modern cloud-native technologies.

About

I'm a Software Engineer with 12+ years of experience building enterprise-grade systems with .NET and modern cloud technologies. I specialize in Fintech — currently developing General Ledger, Hedge Accounting, and Fiscal Calendar modules at Derivative Path for the DerivativeEDGE platform.

My work spans the full .NET ecosystem: .NET Core+, ASP.NET Core, Entity Framework, and MAUI. I design systems using CQRS, DDD, Microservices, Hexagonal Architecture, and Cloud-Native principles — always focused on building software that is scalable, maintainable, and built to last.

Over the years, I've delivered solutions across industries — financial services at XP Inc., automotive at T-Systems for Mercedes-Benz, educational technology at KnowFully, healthcare, retail, and insurance. I also bring strong DevOps experience with Azure, Docker, and CI/CD pipelines.

Beyond .NET, I actively explore Rust, Go, and Python — driven by curiosity about performance, concurrency, and what the next generation of systems will look like. You can find some of these experiments in my open-source projects below.

Experience

  1. Jul 2023 — Present

    Software Engineer on the CAAR team, focused on developing and refining the General Ledger, Hedge Accounting, and Fiscal Calendar modules for the DerivativeEDGE platform. This work enables clients to achieve streamlined financial reporting, accurate hedge accounting, and efficient fiscal period management.

    • C#
    • .NET
    • Azure DevOps
    • CQRS
    • Fintech
    • Hedge Accounting
  2. Feb 2023 — Jul 2023

    Spearheaded the critical platform and architecture migration of SGP Eletrônica, a vital software used for the intricate mapping and parameterization of Electronic Control Units (ECUs) within Mercedes-Benz trucks and buses. Focused on ensuring a seamless transition, modernizing the architecture, and enhancing the platform's capabilities to support advanced automotive diagnostics and configurations.

    • C#
    • ASP.NET Core
    • .NET Core
    • Architecture
    • Migration
  3. Jun 2021 — Feb 2023

    Contributed to the development, maintenance, and infrastructure of key educational technology platforms. Drove full-cycle development of the ExamReview platform encompassing backend services, infrastructure management, and mobile development. Engineered and maintained the CMS platform delivering educational materials to thousands of students via the LMS. Developed the Admin platform for user access control, hierarchy structuring, and overall LMS governance.

    • C#
    • Azure
    • Azure DevOps
    • Microservices
    • CQRS
    • Unit Testing
  4. Jan 2021 — Jun 2021

    Ensured the reliability of international wire transfers within XP Inc.'s international accounts group. Focused on maintaining and enhancing the operational integrity of monitoring processes for Brazil-US fund transfers, managing Azure infrastructure, overseeing .NET Core microservices leveraging SAGA patterns and message queues for transactional consistency, and guaranteeing continuous availability of this vital financial pipeline.

    • Azure
    • .NET Core
    • DevOps
    • SAGA Pattern
    • Message Queues
    • Fintech
  5. Dec 2019 — Jan 2021

    Led the design and development of several key internal applications leveraging .NET Core, Azure, and microservices architecture within an Agile/Scrum environment. Engineered T-Atendo, a helpdesk platform supporting Mercedes-Benz factory workers. Developed Multi Manager, a resource booking system for on-site assets. Created T-Entrego, a platform for distributing welcome kits and corporate gifts.

    • C#
    • .NET Core
    • Azure
    • Microservices
    • REST API
    • Scrum
  6. Sep 2018 — Dec 2019

    Focused on creating specialized applications to support factory operations and internal corporate functions. Developed mileage control applications for trucks within the Mercedes-Benz factory, enhancing tracking and operational oversight. Built and maintained various institutional and intranet applications to support internal communication and processes.

    • C#
    • .NET
    • Azure DevOps
    • Web Applications
    • SQL Server
  7. May 2017 — Sep 2018

    .NET Developer · 5A Attiva / Amil (UnitedHealth Group)

    Developed hospital internal control applications and proof of concept projects for prospecting purposes for other consulting clients. 5A Attiva maintains all internal Amil clinical systems in hospitals and clinics across Brazil.

    • C#
    • ADO.NET
    • SQL Server
    • Healthcare
    • Clinical Systems
  8. Oct 2015 — May 2017

    Developed the second version of the label generation system for all Leroy Merlin stores and built the expansion of Leroy Merlin's business operations management system. SONDA is a leader in systems integration and IT services in Latin America.

    • C#
    • MVC
    • Web API
    • Angular
    • Ionic Framework
    • Microservices
  9. May 2013 — Sep 2015

    .NET Developer · Conecta Serviços

    Developed insurance sales applications for major insurers including Zurich, Assurant, Mapfre, and Cardiff. Built the integration with SIGEP WEB service (Post Office) responsible for issuing tickets for posts and return of objects.

    • C#
    • Web Forms
    • WCF Services
    • Insurance
    • API Integration
  10. 2011 — 2013

    Provided technical support for a state company in the water supply and sanitation segment. Configured Active Directory, virtual machines, LDAP, and handled contingency of company backups. Participated in the development of the company's process system.

    • Active Directory
    • LDAP
    • Virtual Machines
    • IT Infrastructure
View Full Resume

Projects

  • cpnucleo

    A sample solution demonstrating modern .NET best practices — featuring clean architecture, robust testing, dependency injection, and Docker containerization.

    • C#
    • .NET
    • Clean Architecture
    • Docker
    • DDD

  • rinha2-back-end-dotnet

    A high-performance backend implementation for the Rinha de Backend challenge, built with C#, PostgreSQL, and Nginx, designed for maximum concurrency and throughput.

    • C#
    • PostgreSQL
    • Nginx
    • Performance
    • Docker

  • blazor-mudblazor-starter

    A Blazor starter template using MudBlazor UI framework that you can use as a starting point for your project, with pre-configured components and modern styling.

    • Blazor
    • MudBlazor
    • C#
    • .NET
    • WebAssembly

  • rinha2-back-end-go

    A backend implementation for the Rinha de Backend challenge in Go, exploring high-performance server development with PostgreSQL and Nginx.

    • Go
    • PostgreSQL
    • Nginx
    • Performance
    • Docker

  • rinha2-back-end-rust

    A backend implementation for the Rinha de Backend challenge in Rust, pushing the limits of performance with PostgreSQL and Nginx.

    • Rust
    • PostgreSQL
    • Nginx
    • Performance
    • Docker

  • rinha2-back-end-python

    A backend implementation for the Rinha de Backend challenge in Python, exploring concurrency and throughput with PostgreSQL and Nginx.

    • Python
    • PostgreSQL
    • Nginx
    • Performance
    • Docker

  • super-mango-game

    A Super Mango Game written in C for learning purposes, exploring game development fundamentals and low-level programming concepts.

    • C
    • Game Development
    • SDL
    • Low-Level Programming
View All Projects on GitHub