08/30/2026 updated
Premium member
100 % availableSenior Software Engineer | Java, Kotlin, Angular, Spring Boot
Budapest, Hungary
Only remote
Business Administration (BGE, 2011-2014)Java (Programming Language)Software QualityGitHubHibernatePostgreSQLOWASPIonicSystems IntegrationTypeScriptAngular MaterialSpring BootMysql DatabasesBackendKotlinBackend Programming
Java & Kotlin Backend Development
Extensive experience in backend development using Java and Kotlin, including frameworks such as Spring Boot and Micronaut. Design and implementation of REST APIs, integration of third-party systems, and development of scalable, maintainable backend architectures.
Angular Frontend Development
Solid expertise in building and maintaining Angular frontend applications, including migration of major versions, introduction of unit testing with Jest, and establishing coding standards and CI/CD pipelines.
CI/CD & DevOps
Setup and management of CI/CD pipelines, linting, formatting, and deployment processes. Experience with tools such as GitHub, Bitbucket, JIRA, AWS, Heroku, and GitLab, ensuring reliable and automated software delivery.
Database Management (SQL & NoSQL)
Proficiency in SQL and NoSQL databases including PostgreSQL, MariaDB, OracleDB, and Redis. Experience with ORM tools such as Hibernate and JOOQ, as well as database migration tools like Liquibase and Flyway.
Testing & Quality Assurance
Implementation of integration and unit tests using JUnit, Testcontainers, Jest, Jasmine, Playwright, and JBehave. Improvement of overall testing approaches on both legacy and new systems to ensure robust software quality.
Cloud & Infrastructure (AWS)
Hands-on experience with AWS services for cloud infrastructure, including deployment, scaling, and management of applications. Responsible for architecture and infrastructure in private projects sending over 500K emails per day.
Agile & Stakeholder Communication
Active participation in agile ceremonies, sprint reviews, and requirement gathering. Facilitation of communication between business stakeholders and development teams, translating requirements into actionable tasks.
Mentoring & Technical Leadership
Mentoring and leading junior developers, conducting code reviews, technical screenings, and onboarding new team members. Fostering collaborative environments and promoting professional growth within teams.
Third-Party System Integration
Planning and leading integrations with third-party payment systems, car vendor APIs, Salesforce CMS, and other external platforms. Ensuring smooth data synchronization and robust API connectivity across multiple systems.
Extensive experience in backend development using Java and Kotlin, including frameworks such as Spring Boot and Micronaut. Design and implementation of REST APIs, integration of third-party systems, and development of scalable, maintainable backend architectures.
Angular Frontend Development
Solid expertise in building and maintaining Angular frontend applications, including migration of major versions, introduction of unit testing with Jest, and establishing coding standards and CI/CD pipelines.
CI/CD & DevOps
Setup and management of CI/CD pipelines, linting, formatting, and deployment processes. Experience with tools such as GitHub, Bitbucket, JIRA, AWS, Heroku, and GitLab, ensuring reliable and automated software delivery.
Database Management (SQL & NoSQL)
Proficiency in SQL and NoSQL databases including PostgreSQL, MariaDB, OracleDB, and Redis. Experience with ORM tools such as Hibernate and JOOQ, as well as database migration tools like Liquibase and Flyway.
Testing & Quality Assurance
Implementation of integration and unit tests using JUnit, Testcontainers, Jest, Jasmine, Playwright, and JBehave. Improvement of overall testing approaches on both legacy and new systems to ensure robust software quality.
Cloud & Infrastructure (AWS)
Hands-on experience with AWS services for cloud infrastructure, including deployment, scaling, and management of applications. Responsible for architecture and infrastructure in private projects sending over 500K emails per day.
Agile & Stakeholder Communication
Active participation in agile ceremonies, sprint reviews, and requirement gathering. Facilitation of communication between business stakeholders and development teams, translating requirements into actionable tasks.
Mentoring & Technical Leadership
Mentoring and leading junior developers, conducting code reviews, technical screenings, and onboarding new team members. Fostering collaborative environments and promoting professional growth within teams.
Third-Party System Integration
Planning and leading integrations with third-party payment systems, car vendor APIs, Salesforce CMS, and other external platforms. Ensuring smooth data synchronization and robust API connectivity across multiple systems.
Experience
Professional experience10+ years
Freelancer since2026
Languages
GermanGoodEnglishFluentDutchBasic knowledge
Project history
Owner and maintainer of the first Hungarian audiobook for children. Responsible for the project infrastructure, backend API, admin UI, and mobile app. The project is written 95% by AI using Claude, Google Stitch, and Gemini.
Worked on multiple projects including an HR Tool, Digital Illness Project, and Catering product portfolio. Integrated tools to standardize and automate HR processes, reducing development time by 50% and increasing user base by 12000+ users. Led Angular frontend migration from version 14 to 17, introduced unit testing in Jest, established coding standards, and set up CI/CD pipelines. Enhanced backend software architecture with an abstraction layer. Digitized sick leave reporting, mentored junior developers, and managed the first go-live for 9000+ flight crew members. Developed and maintained a catering product enabling real-time updates to meal forecast data, reducing food waste by roughly 111,000 kg/year.
Integrated a third-party payment system for the Middle East region, handling over 20,000 users per day. Planned and implemented an automated invoicing API with PDF generation. Led integration with a car vendor API and designed a REST API for a daily rental product using Micronaut/Kotlin, AWS, and JOOQ with PostgreSQL.