8+ years
Java, JavaScript, TypeScript, cloud, and distributed systems.
Senior Software Engineer
Gustavo Possebon
Backend-heavy product engineering for cloud platforms, enterprise systems, and AI-enabled workflows.
Eight years across identity platforms, healthcare systems, WhatsApp automation, and enterprise communications — mostly Java, mostly backend, always focused on the thing staying up.
Positioning
Senior
Full stack engineer focused on scalable systems, cloud delivery, and AI-enabled product workflows.
Operating context
Remote
Based in Brazil, building for remote-first teams. Available for senior engineering roles where reliability and product impact matter.
20+
Enterprise communications architecture at national scale.
1M+
Operational automation at Zenvia with high availability targets.
99.95%
Reliable production systems across messaging and IAM platforms.
What I build
Systems built to survive production
I like working where architecture, delivery, and operational pressure collide — products where the software actually has to hold up, not just demo well.
Cloud and distributed systems
I like working close to the infrastructure — service boundaries, failure isolation, the stuff that decides whether an incident is a 2am page or a Tuesday afternoon fix.
- Service boundaries designed so one failure doesn't take the rest down with it.
- Kubernetes, GCP, and AWS running real production workloads, not demos.
- Monitoring and incident response habits that keep SLAs honest.
Performance and reliability work
Most of my best work is inside systems that already exist: faster queries, less operational overhead, better test coverage.
- Caching, messaging, and platform integration with Redis, RabbitMQ, Kong, and Keycloak.
- Batch workloads, large dataset processing, and scheduled enterprise jobs.
- Testing and code review discipline that keeps architecture from rotting.
AI in production, not demos
I'm less interested in what AI can demo and more in where it actually saves someone time — faster chatbot setup, better support context, less manual work.
- OpenAI-powered automation for chatbot setup and content retrieval.
- AI wired into support and communications workflows where people actually use it.
- Chatbot setup at Zenvia went from about two hours to under three minutes.
Selected impact
A few numbers that back up the resume
Concrete before-and-after results from the last few roles.
Chatbot setup accelerated
Used OpenAI-powered automation to cut chatbot deployment time at Zenvia, so new conversational flows shipped faster.
OpenAIAutomationProductivity
Filtering performance improved
Introduced a Redis caching strategy at Senior Sistemas that reduced average query time from 500ms to 200ms in high-volume operations.
RedisPerformanceScalability
Messaging platform reliability
Led work in the WhatsApp integration squad at Zenvia while improving system response time from 4 seconds to 1.2 seconds.
WhatsAppReliabilityLeadership
Security and platform quality
Improved code quality and reliability in the identity and access management system through stronger test coverage and code review standards.
KeycloakTestingArchitecture
Case studies
A closer look at three projects
Employer work means no product screenshots, so these focus on the actual problem, the constraints, and what I did about it.
GFT Technologies / SulAmerica SegurosOpen
Enterprise communications at national scale
Supporting a customer communications management platform used by a nationwide insurance operation with more than seven million customers.
JavaSpring BootSpring BatchKubernetes
Senior SistemasOpen
Identity, access, and performance improvements
Worked in the architecture team on authentication and high-volume domain filtering across a multi-product enterprise platform.
JavaKeycloakRedisRabbitMQ
ZenviaOpen
AI-enhanced chatbot operations and WhatsApp flows
Built and optimized automation products powering chatbot operations, WhatsApp integration, and support efficiency.
TypeScriptNode.jsWhatsAppOpenAI
Experience snapshot
Where I've worked
The full experience page has more detail — this is the short version.
GFT TechnologiesJan 2026 - CurrentRemote
Senior Software Engineer
Engineering on SulAmerica Seguros' customer communications management platform for a national-scale customer base.
- Maintaining a distributed architecture with more than 20 microservices for enterprise communication workflows.
- Building batch processing pipelines with Spring Batch for large CSV datasets and scheduled jobs.
- Integrating with external providers including Valid, Quadient, and Sensedia.
- Working across Kubernetes and Google Cloud Platform services such as Pub/Sub, Cloud Storage, Cloud Scheduler, and GKE.
JavaSpring BootSpring BatchKubernetesGCPMicroservices
Senior SistemasAug 2024 - Oct 2025Remote
Senior Software Engineer
Built identity, access, and data-filtering capabilities in the architecture team for a multi-product enterprise platform.
- Implemented SAML, LDAP, and Keycloak-based authentication across 50+ applications.
- Delivered the Abrangencia domain filter feature with Redis caching and production-ready test coverage.
- Reduced average response times by 60% and improved throughput for high-volume filtering operations.
- Supported monitoring and operational excellence with RabbitMQ, Kong, Grafana, Kibana, and Terraform.
JavaKeycloakRedisRabbitMQTerraformGrafana
ZenviaJan 2022 - Aug 2024Remote
Full Stack Engineer
Worked on conversational platforms and WhatsApp integrations serving large automation and support operations.
- Managed automated chatbot flows handling more than one million monthly interactions.
- Built WhatsApp-based 2FA that reduced fraud and unauthorized access attempts by over 70% in the first six months.
- Improved average response time from 4 seconds to 1.2 seconds while maintaining 99.95% availability.
- Introduced OpenAI-powered automation and AI-assisted history retrieval to improve setup speed and support resolution.
JavaScriptTypeScriptNode.jsOpenAIWhatsAppAutomation
Mouts TINov 2020 - Dec 2021Remote
Full Stack Engineer
Delivered software improvements for healthcare and enterprise clients, with a focus on performance and usability.
- Implemented Java and Angular enhancements for Philips Healthcare based on international client requirements.
- Supported a healthcare EMR environment with 99.98% uptime expectations.
- Built an API and micro frontend solution for Ambev's FAQ workflows.
- Optimized PL/SQL queries down to roughly 400ms through indexing and query restructuring.
JavaAngularPL/SQLAPIsMicro frontends
Skills
Full stack, but backend is where I spend most of my time
I can ship frontend when the product needs it, but most of my experience is backend systems running in production.
Backend and architecture
The systems side of things is where I add the most value.
JavaSpring BootNode.jsMicroservicesDistributed systemsREST APIsEvent-driven architectureSpring BatchRabbitMQKeycloak
Frontend and product delivery
I ship across the stack when the product needs end-to-end ownership.
JavaScriptTypeScriptReactReact NativeAngularHTML5CSS3JestCucumberUser-facing workflow design
Cloud, data, and operations
I work best in environments where observability and scale matter.
AWSGCPKubernetesDockerTerraformMongoDBPostgreSQLGrafanaKibanaCI/CD
Contact
Looking for a senior engineer who can operate across product and platform?
I'm open to backend-heavy full stack roles and platform engineering work — reach out if that's what you're hiring for.
Quick facts
- Bachelor's Degree in Software Engineering, PUCRS (Graduated Jan 2022)
- Portuguese (Native)
- English (Advanced)
- GitHub: Possebas
- Open to work in Europe, Australia, Finland, and other countries with strong environments for software engineers, including Italy.