Martin Sykora

Erwin Hymer Group

• Led an initiative and full-scale refactoring of a legacy enterprise service into a modular solution using Clean code, KISS and DRY principles.
• Designed and implemented robust RESTful APIs to serve both frontend applications and other backend services.
• Introduced a streamlined developer onboarding process by documenting critical workflows, creating docker-compose setups for all dependent services (PostgreSQL, Keycloak, ...), and using TestContainers to eliminate local setup requirements for testing and development.
• Integrated automated testing into GitLab CI/CD pipelines and advocated for containerized environments, successfully driving customer adoption of Docker across the development workflow.

Used technologies:

Java / Spring Boot 3 / Swagger / OpenAPI / PostgreSQL / Flyway / MapStruct / git / JIRA / Sonar / jUnit / Mockito / Testcontainers / MongoDB / AI-assisted development / etc.

GK Software

Developed and maintained microservices for retail clients such as Aldi and Lidl, enhancing payment and self-scanning systems.

• Microservices Development: Contributed to the development and maintenance of a suite of microservices tailored for retail operations, ensuring desired functionality and reliability.
• POC for VR-pay Integration: Participated in a proof of concept (POC) project allowing tablet-based store purchases. Implemented communication protocols, developed business logic, and performed comprehensive unit and end-to-end testing.
• Spring Boot Standardization: Upgraded a microservice used for self-scanning stores to adhere to Spring Boot standards, addressing and correcting numerous violations to improve maintainability and compliance.

Used technologies:

Java / Spring Boot 2 / OpenAPI / git / JIRA / Sonar / jUnit / Mockito / WireMock / Testcontainers / etc.

Rohlik Group

05/2019 - 09/2023

As a member of the Checkout team in this highly dynamic company I:

• Developed and maintained Java-based microservices using Spring Boot 2, Swagger, Flyway, QueryDSL, Redis, and RabbitMQ, resulting in an efficient and scalable system.
• Created and consumed REST APIs of third parties, ensuring seamless integration between systems.
• Led the development and maintenance of a microservice responsible for integrating third-party services into the company's system, significantly reducing integration time and expanded product offerings for customers.
• Contributed to multiple other microservices, implementing new features, fixing bugs, and improving system performance.
• Contributed to the team's technical and process improvements, including using Git for version control, JIRA for project management, Sonar for code quality monitoring, and unit and integration testing with JUnit, Mockito, WireMock and Testcontainers.
• Worked in an Agile environment, participating in daily stand-ups, retrospectives, refinements, and quarterly planning sessions, demonstrating strong collaboration and communication skills.
• Maintained a deep understanding of the business goals and objectives of the company and leveraged this knowledge to guide development efforts and ensure alignment with company strategy.

Used technologies:

Java / Spring Boot 2 / Swagger / Flyway / QueryDSL / Redis / RabbitMQ / ArgoCD / GCP / k9s / git / JIRA / Sonar / jUnit / Mockito / WireMock / Testcontainers / Python / etc.

WPA

11/2018 - 04/2019

Created an application that helps with the production planning of thousands of parts per month. Interfacing with the customer's internal IS using Kooby (Kotlin module for Jooby) and Swagger.

Used technologies:

Kotlin / OptaPlanner / git

PNC Bank (US) / HSBC (HK) / Ziraat Bankası (TR) / OCBC Bank (SG) / US BANK (US)

Developed and deployed ATM software solutions for international banks, customizing applications to meet region-specific requirements and compliance standards. Led end-to-end implementation, from initial proof-of-concept (PoC) to final deployment. Secured new business opportunities by delivering successful PoCs to potential banking clients. Mentored junior developers, improving team productivity and ensuring adherence to best coding practices.