About Me

Software Engineer with a passion for fostering high-performing teams.

Berlin, Germany
10+ years experience

I'm a passionate Software Engineer who loves fostering high-performing teams and building products. With over 10 years of experience, I have knowledge in various frameworks, and languages and practices across the software development lifecycle. I specialize in JVM-based languages and cloud-native applications, leveraging the JVM ecosystem to build scalable solutions.

When I'm not coding, you'll find me playing games, tinkering with my homelab, running or drinking a hot cup of coffee.

Josimar Silva - Professional Photo

Work Experience

My professional journey and key accomplishments

Staff Software Engineer
FRIDAY Insurance
January 2023 - April 2026
Berlin, Germany
Full-time

Architectural guild member, guiding teams in architectural decisions and driving technical alignment across the Engineering Chapter. Leading cross-chapter initiatives and projects, establishing technical standards and best practices organization-wide.

Key Achievements:

  • Reduced security fix deployment time by 10% by standardizing base images for JVM-based systems and automating security updates with RenovateBot and nightly container image rebuilds
  • Automated and consolidated DORA-inspired engineering maturity metrics (Security Issues, Code Quality, Time to Response, Defect Ratio) to identify and address team pain points systematically
  • Mentored 4 junior/mid-level engineers, with 2 achieving salary raises within 6 months through focused 1:1s, knowledge-sharing sessions, and actionable feedback
  • Led PolicyCenter v9 to v10 migration managing a team of 3 engineers with zero delays, reducing maintenance costs by 10% while improving developer experience—earning CTO recognition for execution excellence
  • Actively contributed to hiring process, reviewing code challenges and conducting technical interviews for Software Engineer candidates

Technologies Used:

Kotlin
Java
Gosu
Spring Boot
Micronaut
Kubernetes
Helm
AWS
GitLab CI/CD
RenovateBot
Terraform
Software Engineer
FRIDAY Insurance
March 2020 - December 2022
Berlin, Germany
Full-time

Backend-focused software engineer working on policy management, implementing public and internal APIs, and process automation, with ownership of features and solutions from implementation to production.

Key Achievements:

  • Delivered FRIDAY's first French insurance product with high-availability, high-performance APIs, enabling market expansion with technical excellence and business value
  • Implemented BiPRO standard integration to exchange documents with third parties for German insurance products, streamlining partner communication
  • Led workshops on Kubernetes and Helm fundamentals for new joiners, fostering knowledge-sharing and accelerating team onboarding
  • Published open-source SonarQube plugin for Gosu language, contributing tooling to the Gosu open-source community
  • Developed and owned features end-to-end in policy management domain, implementing public and internal APIs focused on process automation

Technologies Used:

Kotlin
Java
Gosu
Spring Boot
Micronaut
AWS
Kubernetes
Helm
GitLab CI/CD
PostgreSQL
DynamoDB
Software Engineer
Youse Insurances
June 2017 - February 2020
São Paulo, Brazil
Full-time

Working in an Agile-driven process environment with many different microservices and products integrated using an event-driven architecture. Developing customizations and new features on Guidewire's products, building microservices and automation tools to improve internal processes, and implementing features for the company's customer service chatbot project.

Key Achievements:

  • Led a 2-person team developing a chatbot project to reduce customer inquiry response time on social media channels (Facebook, WhatsApp), improving customer experience
  • Improved billing platform stability by systematically tackling long-standing technical debt, reducing production incidents
  • Developed customizations and new features for Guidewire products (PolicyCenter, ClaimCenter, BillingCenter) in Agile environment
  • Implemented features and managed customer service chatbot infrastructure using Dialogflow

Technologies Used:

Ruby
Gosu
Node.js
RabbitMQ
Dialogflow (API.AI)
Guidewire Platform
Microservices
Guidewire Consultant
Abaco Consultores
September 2016 - May 2017
Brasília, Brazil
Full-time

Developing customizations and new features on Guidewire's products (ClaimCenter, ContactCenter, BillingCenter, and PolicyCenter) at Youse Seguros.

Technologies Used:

Gosu
Tomcat
MSSQL
Java Consultant
ITSS Soluções em Tecnologia
August 2015 - August 2016
Brasília, Brazil
Full-time

Development of integration middlewares and new applications to integrate with SAP ERP. Configuration and management of the application's test/homologation and production environments.

Technologies Used:

Java
Struts 2
EJB 3
Weblogic
Java Developer
3Way Networks
February 2015 - July 2015
Brasília, Brazil
Full-time

Maintenance and development of Federal Road Police's software. Worked with various frameworks from the Java ecosystem, including applets, JSF, Struts 1, and EJB 2.1.

Key Achievements:

  • Refactored legacy applet for radar image analysis for Federal Road Police, reducing maintenance overhead and improving performance

Technologies Used:

Java
JSF
Struts 1
EJB 2.1
JBoss
Junior Java Developer
Grupo NT
March 2014 - February 2015
Brasília, Brazil
Full-time

Developed and maintained features on the AVANT teaching platform, migrating legacy architecture to JSR 286 specification for Liferay Portal integration.

Key Achievements:

  • Provided technical assistance to a junior team in another branch office, supporting knowledge transfer and team development

Technologies Used:

Java
Struts 2
JBoss
PostgreSQL
Software Developer
CapuL
June 2012 - February 2014
Unaí, Brazil
Full-time

Analysis and development of customizations in the ERP Protheus by ADVPL language.

Key Achievements:

  • Pioneered the adoption of Redmine and SVN, enhancing version control and project tracking for ADVPL customizations.

Technologies Used:

ADVPL
SVN

Skills & Expertise

Technologies and tools I use to bring ideas to life

Programming Languages, Frameworks & Data
Java10 years
Kotlin5 years
Python2 years
JavaScript4 years
Spring Boot5 years
Micronaut5 years
Quarkus1 years
NodeJS3 years
SQL5 years
Redis2 years
DynamoDB4 years
PostgreSQL5 years
Cloud & DevOps
AWS4 years
Docker7 years
Kubernetes5 years
Helm4 years
Terraform3 years
Git8 years
Prometheus4 years
Grafana4 years
Github Actions3 years
Gitlab4 years
Software Engineering & Practices
Software Development10+ years
Technical Leadership3 years
API Design5 years
E2E Testing4 years
Performance Testing5 years
Peer Mentorship4 years

Education & Certifications

Academic background and professional certifications

Education

Postgraduate Degree in Applied Statistics
Uninove
July 2018 - July 2019
Sao Paulo-SP, Brazil

Diving into statistics.

Bachelor's Degree in Computer Information Systems
INESC-CNEC
August 2010 - July 2014
Unaí-MG, Brazil

Where I fell in love with Software Engineering.

Professional Certifications

FJ-91, Architecture & Design of Java Projects

Caelum

Issued 2019
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LE-1, Linux Essentials

Linux Professional Institute

Issued 2019
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Oracle Certified Professional, Java SE 6 Programmer

Oracle

Issued 2015
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Let's Work Together

I'm always interested in new opportunities and exciting projects. Whether you have a question, want to collaborate, or just want to say hi, I'd love to hear from you.

Currently available for freelance projects and full-time opportunities