Murillo Ventura Mendonça

Backend Software Engineer

Professional Summary

Backend Software Engineer experienced in developing, maintaining, and optimizing production backend systems, RESTful APIs, multi-tenant platforms, authentication integrations, cloud-hosted applications, observability tooling, and CI/CD workflows.

Strong background in C#, .NET, PostgreSQL, Java, Go, Python, Keycloak, AWS, GitLab CI, Docker, and Grafana-based observability, with experience in code review, automated testing, production debugging, performance optimization, and scalable backend development.

Experience

Communify

Software Engineer | 2025 - Present | Remote

Developed and maintained C#/.NET backend services and RESTful APIs for multi-tenant user, account, and market-data workflows.
Engineered custom Keycloak authentication plugins and integrations to centralize MFA handling for desktop and mobile users.
Built internal release-management tooling integrated with GitLab CI, AWS, Cloudflare, and Jira APIs.
Reduced deployment effort by 50% through release workflow automation.
Improved average response time by more than 30% on critical-path PostgreSQL queries.
Worked with Grafana, Loki, and Tempo traces to identify slow execution paths and guide performance optimizations.

Itexto

Junior Software Engineer | 2024 - 2025 | Hybrid - Belo Horizonte, MG

Maintained and enhanced backend, frontend, database, and cloud applications for multiple client projects.
Implemented features using Java, Spring Boot, Angular, React, Python, Django, Go, and RESTful APIs.
Developed Go backend services, including a REST backend and a video-processing microservice for AWS S3 storage workflows.
Wrote and maintained automated tests with JUnit, Mockito, and Cucumber.
Supported Docker and Kubernetes application environments across AWS and GCP deployments.

Embraer S.A.

Software Engineering Intern | 2021 - 2023 | Hybrid - Sao Jose dos Campos, SP

Implemented and maintained internal web applications used by business areas to support operational processes.
Maintained enterprise databases, backend logic, and legacy ColdFusion applications.
Contributed to an internal portal that centralized tools, workflows, and applications for multiple departments.

Project Highlight

GASS-Metal

Scientific Article / Research Software | Federal University of Itajuba

Adapted the GASS method to identify metal-binding sites in proteins using M-CSA and MetalPDB template data.
Validated research results against benchmark datasets and defined test cases.
Optimized parameters of a parallel genetic algorithm and contributed to the public web server.
Co-authored an article published in Briefings in Bioinformatics.

Read the paper

Education

Federal University of Itajuba - Itabira

Bachelor's Degree in Computer Engineering | Started Feb 2018

Technical Skills

Languages: C#, Java, Go, Python, TypeScript, JavaScript, C++, SQL, R
Backend & APIs: .NET, RESTful APIs, Spring Boot, Django, Flask, Node.js, Keycloak, Go services
Testing & Code Quality: code review, JUnit, Mockito, Cucumber, .NET test framework, debugging, root cause analysis
Databases: PostgreSQL, MySQL, SQLite, Oracle DB, MongoDB, MariaDB
Cloud & DevOps: AWS, GCP, GitLab CI, Cloudflare, Docker, Kubernetes, Git, CI/CD
Observability: Grafana, Loki, Tempo, LGTM stack, tracing, production debugging
Research: CUDA, MPI, multithreading, genetic algorithms, benchmark validation

Languages & Certificates

Languages: Portuguese native, English fluent, Spanish professional.

Certificate: Advanced English Certificate - Excel Language School, issued Jun 2017.