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Gradle Experts in Cologne

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Hire experts who set up Gradle builds, tune the Kotlin DSL or Groovy DSL, and keep Java and Android delivery moving. Get fast, precise matching with vetted, available freelancers.

Meet FRATCH Experts in Cologne, who have recently used Gradle

Verified expert

Jacqueline Haefke

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Düsseldorf
Jacqueline Haefke

Last position:

Kitchen Appliance Manufacturer

  • Setting up and enhancing an international subscription management system

  • Migrating and decommissioning a Hybris-SAP system and integrating Zuora

  • Implementing numerous interfaces to various systems (external and internal)

  • Setting up and improving monitoring with Grafana, Prometheus, and Databricks

  • Introducing logging with Loki

  • Implementing business requirements using jQuery, Thymeleaf, Spring Boot, Java, Go, and Python

  • Adjusting and extending the GitLab CI pipelines

  • Setting up and extending infrastructure as code with Terraform and ArgoCD on AWS

  • Setting up and running E2E and performance tests

  • Expanding the Databricks business intelligence solution to provide various KPIs

  • Responsibilities: Architecture, DevOps, development, unit tests, coaching employees and apprentices, E2E, smoke, and integration tests, agile methods consulting (Kanban, Scrum)

  • Technologies and methods: Java, Go, Kotlin, Node.js, Spring Boot, SOAP/REST, Quarkus, Thymeleaf, Vaadin, Slack, Jira, Confluence, IntelliJ, GitLab, SQS, Kafka, AWS, Kubernetes, Terraform, Maven, Gradle, GitLab CI, Databricks

Verified expert

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Building test automation with Cucumber

Cologne

Last position:

Rewe Digital

  • Creation of Spring Boot integration tests
  • Creation of JUnit tests for the coupon system
  • Creation of component tests for Kafka topics
  • Creation of CI/CD pipeline scripts
  • Creation of UI tests with Playwright
  • Creation of UI tests with Cypress
  • Review of developer unit tests
  • Planning the test architecture for integration tests
  • Creation of the test automation concept
  • Evaluation and creation of test reports
Verified expert

Allal Kharaz

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Java Senior Full Stack Developer

Frechen
Allal Kharaz

Last position:

Java Senior Full Stack Developer at Insurance ÖRAG

  • Further development of a policy administration system (contract/claims) for the legal expenses insurer ÖRAG.
  • My role: Senior Software Developer.
  • The team consists of 12 developers.
  • Technologies used: Java 8/21, Java EE, Quarkus, WebLogic, JPA, RabbitMQ, JTA, CI, CD, Jenkins, DB2, Maven, Jenkins, GIT (bitbucket) later GitLab, Junit, Elasticsearch, Mockito, Jira, SonarQube, Scrum, React, Workflow
  • Migration and modernization of legacy systems: rewrote C and C++ code in Java to improve maintainability, scalability, and performance. Refactored Python into Java, including optimization and integration into modern architectures.
  • Study on the use of AI (Codex) for implementing a Java feature. The goal is to compare the time spent and productivity of AI-supported development with a classic implementation by a developer. The results should show how strongly the use of AI affects development time and efficiency.
  • Development of the following tariff calculators for the years 2024/2026: private, companies, doctors, farmers, owner-occupied G + H, landlords, traffic, club, top managers, sales representatives, special criminal law, savings bank, municipal, BayGT, doctors, Dehoga
Verified expert

Jacqueline Krech

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Senior Java/Kotlin Fullstack Cloud DevOps

Köln
Jacqueline Krech

Last position:

OTTO

  • Design, development, and monitoring of microservices
  • Migrating functions from a monolithic system into separate microservices
  • Designing and implementing new microservices (backend and frontend)
  • Setting up and maintaining a CI/CD pipeline (GitHub Actions)
  • Configuring cloud infrastructure with AWS CDK and Terraform
  • Designing and implementing event-driven communication with AWS SNS/SQS and Apache Kafka
  • Ensuring code quality through Test Driven Development (TDD), static code analysis, and Clean Code

Discover over 15,000 top freelancers

Statistics of experts using Gradle

Aggregated from the professional profiles of matched freelancers.

Experience

13 years

Position duration

1.8 years

Positions per freelancer

8

Top business areas

Information Technology, Quality Assurance, Product Development

Top industries

Information Technology, Insurance, Banking and Finance

Certification focus areas

Information Technology, Product Development, Project Management

Bachelor's degree or higher

100%

Master's degree or higher

67%

Certifications per freelancer

3

Most common languages

German, English, Arabic

Speak two or more languages

100%

Based on our profile pool as of 30 Aug 2026.

About the technology

Build automation

Gradle is a build automation tool used for Java, Kotlin, Android and many JVM-based systems. It handles compilation, testing, packaging and release tasks in a repeatable way. Strong professionals shape build logic so delivery stays predictable across local machines and CI.

Common work

  • Create and clean up Gradle build scripts
  • Migrate from Maven or older build setups
  • Add multi-module structure and shared conventions
  • Configure test, lint and packaging tasks
  • Stabilize builds in CI pipelines

DSL and plugins

Gradle projects often use the Groovy DSL or the Kotlin DSL. Experts also work with custom plugins, dependency management, version catalogs and wrapper setup. They know how to keep build logic readable without turning it into a maintenance burden.

When to hire

Companies bring in freelance Gradle specialists when builds get slow, brittle or hard to understand. The need often appears during product growth, dependency upgrades or Android and backend modernization. In Cologne, this is common for teams that want focused help without long onboarding.

Strong signals

A strong professional can explain why a task belongs in the build, the plugin or the application code. They watch for cache-friendly configuration, clear module boundaries and safe dependency resolution. They also know how to debug failures from the command line and in CI.

Team fit

Gradle work can be done remotely or on site, depending on the team and the release process. For Cologne-based companies, clear communication matters when builds support local product teams, shared services or distributed delivery. Good specialists document changes so the next handover is simple.

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Frequently asked questions

Key details about Gradle, drawn from the questions we get asked most.

Gradle is used to automate build, test, package and release steps for Java, Kotlin, Android and other JVM projects. It is especially useful when teams need flexible build logic, custom tasks or multi-module setup. Many companies also use Gradle to standardize CI behavior across services and apps.

Gradle is usually chosen when teams want more flexible build logic and faster iteration on complex projects. Maven is more opinionated and can be easier for very simple setups, but it becomes rigid when the build needs custom behavior. A good specialist will explain which parts should stay in Gradle and which should move into code or pipeline steps.

Gradle help is worth bringing in when builds are unstable, slow or hard to change safely. It also makes sense during a Maven migration, an Android project cleanup or a major dependency upgrade. If CI is failing in ways that are hard to trace, a specialist can usually narrow the problem quickly.

A strong Gradle expert often knows Java or Kotlin, dependency management, CI pipelines and testing tools. On Android projects, Android build variants, flavors and signing are common too. For backend systems, multi-module design and release packaging matter more.

Not always, but Gradle changes can affect the whole build, so even small tasks need care. Simple scripting edits are one thing; plugin design, dependency resolution and CI troubleshooting are another. For anything touching release flow or shared build logic, deeper experience pays off.

Yes, Gradle work is often done remotely because most tasks live in the build files, CI logs and source control. On-site work in Cologne can help during migration workshops, build troubleshooting sessions or fast alignment with local teams. The key is clear access to repositories, pipelines and release context.

Look for a Gradle specialist who keeps build logic simple, uses the wrapper correctly and avoids hidden complexity in scripts. Good signs are clean module boundaries, readable plugin use and stable CI behavior after the change. They should also explain trade-offs clearly, not just edit files.

No. Gradle is the build tool itself, while Gradle Kotlin DSL is one way to write its build scripts. Some teams still use the Groovy DSL, and a good freelancer should be comfortable with both. The right choice depends on team habits, existing code and how much structure the build needs.

Of the freelancers in Cologne, Germany who have used Gradle in their recent projects, 100% hold at least a Bachelor's degree and 67% hold at least a Master's degree.

On average, freelancers in Cologne, Germany who have used Gradle in their recent projects have 13 years of professional experience, with a single engagement typically lasting around 1.8 years.

The most common languages among freelancers in Cologne, Germany who have used Gradle in their recent projects are German (100%), English (100%), and Arabic (17%).

The most common industries among freelancers in Cologne, Germany who have used Gradle in their recent projects are Information Technology (83%), Insurance (67%), and Banking and Finance (50%).

The most common business areas among freelancers in Cologne, Germany who have used Gradle in their recent projects are Information Technology (100%), Quality Assurance (83%), and Product Development (67%).

Main locations of FRATCH Experts, who have recently used Gradle

Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.

Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg

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Philipp Thomaschewski

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