Adam Białas, Developer in Bielsko-Biala, Poland
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Adam Białas

Verified Expert  in Engineering

Software Developer

Bielsko-Biala, Poland
Toptal Member Since
June 19, 2020

Adam is a developer with more than eight years of experience in Java. He's highly motivated and focused on good quality products and code. Adam puts a lot of pressure on continuous improvement and has strong skills in Java, Spring, and SQL. He's interested in system and application architecture.


Ellie Mae
Amazon Web Services (AWS), Microservices, Apache Kafka, WebFlux...
Diebold Nixdorf
Eclipse Modeling Framework (EMF), WebSphere, JBoss, WildFly, PostgreSQL, Oracle...
SKG - Knowledge based IT
Apache Wicket, Oracle Database, WebLogic, Spring, Java




Preferred Environment

Slack, IntelliJ IDEA, MacOS

The most amazing...

...thing I have developed is the AI-powered automation for the mortgage industry that will be used by the most of the market.

Work Experience

Senior Java Developer

2019 - PRESENT
Ellie Mae
  • Developed an application for the mortgage industry in the US which allows to speed-up underwriter process.
  • Recognized as a key team player who delivers implemented features fast with high quality.
  • Took part in the architectural design process of new microservices.
  • Introduced Spring Cloud Contract tests within the company to verify the communication content compatibility between services in a fast way.
Technologies: Amazon Web Services (AWS), Microservices, Apache Kafka, WebFlux, Spring Cloud Stream, Spring Boot, Java

Full-stack Developer

2015 - 2019
Diebold Nixdorf
  • Developed an application for customizing flow on the ATM.
  • Developed an application for delivering personalized adverts to the ATM based on customer data.
  • Had an influence on the architecture of the system. Started refactoring from a monolith into microservices.
  • Introduced CI/CD pipelines based on Jenkins and Bitbucket. Wrote a customizable pipeline library that was used by a few teams across the company.
  • Took part in the first company production-ready deployment of the application to the Azure cloud. Provided Docker support for images with an application.
Technologies: Eclipse Modeling Framework (EMF), WebSphere, JBoss, WildFly, PostgreSQL, Oracle, Spring Boot, Java EE, Java

Full-stack Developer

2012 - 2014
SKG - Knowledge based IT
  • Developed a web application for managing centralized retail chains.
  • Took part in the development and maintenance phase.
  • Recognized as an expert in stock and accounting part of the application.
Technologies: Apache Wicket, Oracle Database, WebLogic, Spring, Java


A Spring-based web application that is the perfect solution for centralized retail chains and networks managing franchisees. It suits stores and supermarkets but also smaller retail outlets. It simplifies a lot of processes and minimizes the costs of IT infrastructure.

Ellie Mae AIQ

A Spring-based application that provides lenders the capabilities to originate loans faster with greater consistency by applying AI to the loan manufacturing process and streamlining document collection, data validation, calculations, and risk analysis.

App to Deliver Personalized Ads to ATMs

A web-based application that was used to create personalized ads based on customer data received from the ATM. I was a full-stack developer (mainly Java EE and JSF). I was also responsible for the initial phase of refactoring from a monolith into microservices.


Java, SQL


Spring Boot, Spring MVC, Hibernate, Spring, Spring Core, Spring Cloud Stream, WebFlux, Vaadin, Eclipse Modeling Framework (EMF), Jakarta Server Pages (JSP), JSF, Apache Wicket


Git, IntelliJ IDEA, Slack, WildFly


REST, Microservices


Spring Data JPA, PostgreSQL


Back-end, APIs, WebLogic


Java EE, Docker, MacOS, Oracle Database, Oracle, JBoss, WebSphere, Apache Kafka, Amazon Web Services (AWS)

2008 - 2010

Master's Degree in Computer Science

AGH University of Science and Technology - Cracow, Poland

2005 - 2008

Engineer's Degree in Computer Science

The University of Bielsko-Biala - Bielsko-Biala, Poland


Oracle Certified Professional, Java SE 8 Programmer



Oracle Certified Associate, Java SE 8 Programmer



C100DEV: MongoDB Certified Developer Associate Exam

MongoDB Inc.