Johnathan
Santiago
Senior Software Engineer specializing in Java & Cloud. Currently at The Home Depot.
4
Companies
5
Certifications
2
Languages
About Me
Java & Cloud
Engineer
Senior Software Engineer specializing in Java and Cloud technologies, with deep expertise in distributed systems, microservices, and cloud-native architectures on GCP and AWS. Passionate about building software that is reliable, performant, and built to last.
I thrive at the intersection of backend engineering and DevOps — designing systems that scale, automating what slows teams down, and shipping meaningful improvements to production. I enjoy mentoring engineers and driving technical decisions that raise the quality bar across the whole team.
Outside of engineering I'm an avid soccer player and fishing enthusiast. I believe the balance of hobbies and technical work shapes a sharper, more creative problem-solver. Fluent in English and Portuguese.
4
Companies
5
Certifications
2
Languages
Career
Work Experience
Senior Software Engineer — Booking Search
Now- →Enabled store-based rollout feature on the main apps (Receipt-Search and Booked-Order-Search)
- →Implemented GitHub Actions in multiple apps to enable build and deployment in LLC environments
- →Designed a solution for communication between cloud apps and the in-store app using Monarch, an internal tool
- →Implemented a reprocess framework for a SAGA design pattern project
Senior Software Engineer — Store Checkout
- →Led Vault Rehoming: migrated legacy C/Tandem DB system to Java Spring Boot + CockroachDB on PCF & GCP
- →Designed secure daily CRDB snapshots on GKE via JavaScript automation — achieved 100% uptime
- →Built comprehensive Grafana dashboards for real-time operational visibility
- →Established code review sessions and Slack channels to coordinate distributed team
Software Engineer — Retail Media (Contract at The Home Depot)
- →Modernized 6-year-old Spring Boot API with Java 17 + OpenFeign on GCP
- →Designed GraphQL + REST hybrid model, improving code maintainability by 20%
- →Optimized auto-scaling: reduced CPU usage from 80% → 25%; latency from 150ms → 30ms via Redis caching
- →Improved unit test coverage by 80% using Cucumber BDD
- →Increased product recommendation engagement by 21% through internal API integration
Software Developer — SIPAC & SigAdmin Systems
- →Enhanced SIPAC and SIGAA university systems serving multiple Brazilian institutions
- →Transitioned from JNDI to RabbitMQ for data synchronization, reducing dependencies by 10%
- →Implemented advanced password security features in SIGADMIN
- →Maintained 2-week SLA compliance across development support for multiple institutions
Software Developer — Legis & SIAP AP Concessoes
- →Built Legis — norms and laws submission system for the Court of Accounts of Rio Grande do Norte
- →Digitized the auditing process and reduced validation time by 15%
- →Provided public access to legislation via web portal
- →Streamlined project management using a customized agile methodology
Education
MS Computer Science
Maharishi International University (MIU)
Fairfield, IA, USA
Technical Residency — Legal IT
Federal University UFRN
Natal, Brazil
BS Information Systems
Rio Grande do Norte University Center (UNI-RN)
Natal, Brazil
Certifications
Google Cloud
Credly / IAPP
Linux Foundation
APISec University
Google Cloud
Work
Selected
Projects
← Scroll to explore →
Ad Placement API — Grid Dynamics
Modernized a 6-year-old Spring Boot API using Java 17 and OpenFeign on GCP. Designed a GraphQL + REST hybrid model, optimized auto-scaling cutting CPU usage from 80% → 25%, and slashed latency from 150ms → 30ms via Redis caching.
Expertise
Tech Stack
Languages
Frameworks & Libraries
Cloud & DevOps
Databases & Messaging
APIs & Architecture
Testing & Monitoring
Contact
Let's Build
Together
Have a project in mind, or just want to connect? My inbox is always open — I'm excited to hear what you're building.