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Odilon Jonathan Kroger

@odilonjonathankroger

Message

Senior backend engineer building reliable, scalable systems and AI-driven solutions.

Brazil

Message

What I'm looking for

I seek backend or AI-focused roles where I can improve reliability, mentor engineers, work on scalable systems, and collaborate across teams.

I am a senior backend engineer with deep experience building scalable microservices, financial systems, and AI-driven features across global teams.

At Workera I worked with Elixir/Phoenix, prompt engineering, and test automation to ensure LLM outputs met expectations and to compare models, while contributing new features and maintaining the platform.

Previously at Olist and PagSeguro I designed and maintained high-throughput systems using Golang, Kafka, Kubernetes and related tooling, led technical initiatives, identified performance bottlenecks, and mentored other engineers.

I prioritize reliability, observability, and collaboration, and I bring a track record of improving test coverage, system performance, and cross-team integrations to deliver production-ready solutions.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Workera

Aug 2023 - Nov 2025 (2 years 3 months)

Implemented Elixir/Phoenix features and prompt-engineering tests with promptfoo to ensure LLM outputs and enable model comparisons, boosted test coverage and supported multilingual content and data-pipeline maintenance.

Elixir Phoenix OpenAI API Playwright Docker PostgreSQL AWS S3 Testing

Principal Software Developer

Olist

Aug 2022 - Aug 2023 (1 year)

Led technical strategy, performance improvements and cross-team integrations for microservices architecture, mentored engineers and drove scalability and reliability initiatives using Go and Kafka.

Golang Kafka PostgreSQL Kubernetes Docker Grafana System Design

Senior Software Developer

Olist

Jan 2021 - Aug 2022 (1 year 7 months)

Designed and developed a marketplace integration platform composed of microservices in Go and Python, improving marketplace connectivity and reliability across services.

Golang Python Kafka PostgreSQL Kubernetes Docker CI CD Microservices

Senior Software Engineer

PagSeguro

Apr 2019 - Jan 2021 (1 year 9 months)

Developed and documented financial microservices and ensured high reliability for transaction-critical systems, contributing to architecture and design for payment domains.

Java Spring Golang Kafka Docker Kubernetes Terraform AWS Monitoring CI CD

Mid-level Software Developer

Senior Sistemas

Dec 2018 - Apr 2019 (4 months)

Implemented microservice features, performed code reviews and collaborated with PO/UX to improve workflows and reduce technical debt within an Agile team.

Java 8 Spring PostgreSQL RabbitMQ Docker Git Jira