Sebastián Katzer

Agile software development in an interdisciplinary environment

Cross-team collaboration to achieve important milestones

Independently developing new and improving existing features

Estimation, refinement, implementation, and presentation

Finding solution ideas, analyzing problems, rolling out bug fixes

Writing automated tests, manual testing, log and error analysis

Ensuring high availability, fault tolerance, and scalability of the production environment

Rolling out releases and multi-stage infrastructure

Setting up alerts and monitoring

Pair programming, code reviews, documentation

On-call duty, 3rd level support

Event-Driven Architecture, Clean Code, Hexagonal Architecture

Microservices based on Go (Gin), Java 21 (Spring Boot 3), Python (FastAPI)

Terraform/OpenTofu, KQL, SQL, JSON, REST, Helm, ArgoCD, AzureCLI, K9s, OAuth2

Postgres, Redis, Kafka, Azure EventHub, Kubernetes, nginx, Ingress

AppInsights, LogAnalytics, OpenTelemetry, Datadog, OpenAPI 3, Swagger

Azure DataExplorer, Storage, KeyVault, Container Registry, Azure Functions,…

Junit5/Jupiter, testify, RestAssured, Docker Compose, Wiremock

IntelliJ, Scrum, Kanban, Teams, Confluence, OpsGenie, Arc42

GitHub CI/CD, GitLab CI/CD, Azure DevOps

EV charging protocols (EVSE, OCPP, V1G, V2G)

Finding solution approaches and implementing them in the legacy system while it's running worldwide; extending the data model and migrating existing data

Parallel extraction of parts of the legacy system into standalone services and their deployment; redevelopment using modern technologies and domain-driven design

3rd level support, fixing (and finding) bugs and incidents

Technical and functional onboarding of new team members

Supporting manual tests; writing automated software tests; attending SCRUM meetings

Java 8/11/17, Java EE Stack, Spring Boot Stack, Axon, Apache Camel, Hibernate, DeltaSpike, Tomcat, Weld CDI, Junit Jupiter, Spock, Gherkin, Cucumber

CQRS, Event Sourcing

Amazon AWS Stack (Beanstalk, CloudWatch, Container Registry, EC2, SNS/SQS, LaunchDarkly, Lambda, saml2aws, etc.), CloudFormation, Terraform

Docker, Gradle, IntelliJ, MySQL

Jenkins, SonarQube, GitLab, GitLab CI, Serenity

Jira, Confluence, Miro, Slack, Teams, Whiteboard

OWASP

Scrum, Kanban

Developing an engine for transaction classification

Bidirectional integration of external partners (e.g., banks) to import and manage customer data

Java, Groovy, PostgreSQL, Vavr, JSON, REST API, Swagger (OpenAPI 2)

Spring, Docker, Grafana, Spock, TestRail, Git, Gradle

Scrum, Jira, Confluence

Communication with the client

Responsible for architecture and implementation

Integration into the existing IT landscape

C, Go, mruby, Ruby, JS, Sencha

Git, Scrum, Jira, Docker, SSH, SSL, HTTP, Sockets

Design and development of private APIs for mobile clients

Design and development of public APIs for the affiliate program

Interface development to integrate external data sources

Ruby, JavaScript, OAuth 2, MySQL

Rails, Elastic Search, Jira, Git, Scrum

Design and implementation of various main components, including dashboard, time management, messenger, calendar and profile

Integration of local and push notifications

Java, Android

Git, Maven, protobuf, Robolectric

Jira, Confluence, Scrum

Responsible for architecture, implementation and deployment

Coordination of interface specifications

Development of the backend and the push service

Development of mobile clients for Android, iOS and Windows Phone

Development of the administration interface as a web application

Development of the Visio plug-in for modeling escalation flows

Java, Ruby, JavaScript, Objective-C, C#, Visual Basic, Oracle

Rails, ExtJS, Android, iOS, .NET, Visio, BEA, Git

Scrum, Jira