Engineering leader specializing in scalable backend systems and cloud architecture.
Orchestrates teams and modern cloud technologies (AWS, Kubernetes) to deliver scalable, high-availability platforms.
Dynamic, results-driven leader with 18+ years improving system reliability, scalability, and user experiences across digital media, startups, and government.
- 18+ years in software engineering; SRE and Technical Lead experience.
- Expert in backend development (Ruby on Rails, Java) and cloud infrastructure (AWS, Docker, Kubernetes).
- Leader in microservices architecture and system design; cross-continental teams (U.S./Brazil).
EXPERIENCE
Disney & ESPN Media Networks
Total: 12 years- Oversaw AWS cloud architecture and microservices reliability, achieving ~99.9% uptime.
- Implemented observability (CloudWatch, Grafana) and optimized alerting, improving incident response by 30%.
- Led CI/CD pipelines and Infrastructure as Code (Terraform), reducing deployment errors.
- Led cross-continental team modernizing ESPN’s CMS from Java JSP to Ruby on Rails, boosting publishing efficiency by 40%.
- Architected migration from monolith to microservices, improving scalability and maintainability.
- Built real-time sports data services and second-screen applications delivering instant stats and synchronized experiences.
- Implemented push notifications and performance optimizations for high-traffic events.
Insight Soluções em Sistemas
Total: 3 yearsI founded a technology consultancy where I delivered bespoke web and mobile products and incubated in-house ventures like Mapping My Money and Syiwe on AWS and Heroku.
Khronus Soluções
Total: 2 yearsI developed the Z7Zoe e-commerce platform with multi-level marketing workflows, referral analytics, and automated deployments on Heroku.
Sync Sistemas
Total: 2 yearsI launched GeoVoice, a voice-based survey system that integrated Asterisk PBX, Adhearsion, and PostGIS to map responses and speed decision-making.
Interjato ISP
Total: 3 yearsI built our internal CRM and institutional website, automating workflows with Ruby on Rails, MySQL, and optimized Linux/Apache infrastructure.
Federal Institute of Rio Grande do Norte (IFRN)
Total: 1 yearI customized Moodle for distance learning, deploying it on a Beowulf Linux cluster and tuning databases for scalable delivery.
PROJECTS
Mapping My Money (2012)
- Personal finance platform with social goal sharing.
- Built with Ruby on Rails and banking API integrations.
- Finalist in Buscapé’s national fintech challenge.
Syiwe (2013)
- Co-founded web/mobile platform connecting companies and users.
- Built Ruby on Rails backend and JavaScript frontend on AWS.
- Selected for FIESP’s Acelera Startup program.
Klipbox (2014)
- Automates tracking of 50k+ news sources.
- Scalable backend with Node.js and MongoDB; integrated AI analysis.
- Selected by Start-Up Brasil/SEED with investment; reduced monitoring time by 90%.
DocFlux (2015)
- Templating and batch PDF processing for scalable document generation.
- Node.js server, PDF.js rendering, MongoDB storage.
- Increased productivity by eliminating repetitive manual tasks.
PROFILE
I am a seasoned Software Engineering Leader with 18+ years of experience building and modernizing scalable, cloud-based applications. My career spans roles as a Senior Site Reliability Engineer and Technical Lead, leading teams to design reliable systems on Ruby on Rails and AWS. I believe technology is most powerful when it reflects empathy and purpose. Outside of work, I’m a lifelong learner and creative spirit who enjoys music and impersonation. Fluent in English and Portuguese; proficient in Spanish.
SKILLS
| Skill Category | Skill Name | Proficiency Level | Years of Experience |
|---|---|---|---|
| Programming Languages | JavaScript | 95% | 18 |
| Programming Languages | Ruby | 95% | 18 |
| Programming Languages | Java | 95% | 18 |
| Programming Languages | Swift | 73% | 9 |
| Programming Languages | DotNet | 88% | 15 |
| Programming Languages | Python | 75% | 10 |
| Frameworks | Ruby on Rails | 75% | 10 |
| Frameworks | Sinatra | 65% | 6 |
| Frameworks | RESTful APIs | 80% | 12 |
| Cloud & DevOps | AWS | 70% | 8 |
| Cloud & DevOps | Docker | 68% | 7 |
| Cloud & DevOps | Kubernetes | 60% | 4 |
| Cloud & DevOps | CI/CD | 70% | 8 |
| Cloud & DevOps | Terraform | 60% | 4 |
| Data Platforms | PostgreSQL & PostGIS | 73% | 9 |
| Data Platforms | MySQL | 75% | 10 |
| Data Platforms | MongoDB | 65% | 6 |
| Data Platforms | Elasticsearch | 63% | 5 |
| Tools & Practices | Git | 80% | 12 |
| Tools & Practices | Monitoring | 70% | 8 |
| Tools & Practices | Site Reliability Engineering | 60% | 4 |
| Tools & Practices | Test-Driven Development | 75% | 10 |
| Tools & Practices | Agile/Scrum | 75% | 10 |
| Tools & Practices | Linux/Unix Servers | 95% | 18 |
CONTACT
Let’s build reliable, user-centric products together. Reach out via email, phone, or the form below.
- Email: wkelyson@gmail.com
- Phone: +55 (11) 97679-4745
- Location: Brazil/SP/RN - (GMT-3)Open to international opportunities