Bartłomiej Rasztabiga

Senior Kotlin/Java Backend Engineer

Warsaw, Poland, CET

LinkedIn
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About

Experienced Backend Engineer skilled in Kotlin and Java, with a specialization in designing and building distributed, scalable systems. Over 5 years of experience in working with companies of different sizes and locations.

Work Experience

Symmetrical.ai
Warsaw

Jan 2022 -

Senior Backend Engineer

Built symmetrical products from the ground up. Ocassionaly lead teams and projects. Technologies: Kotlin, Spring Boot, MongoDB, Apache Kafka, Kubernetes, AWS

Sollers Consulting
Warsaw

Jul 2021 - Jan 2022

Full Stack Engineer

Worked on new features for internal HRIS software, used every day by all Sollers employees. Technologies: Java, Spring Boot, PostgreSQL, React.js, TypeScript

Ignite Software Development
Remote

Jul 2020 - Jul 2021

Lead Backend Engineer

Lead team of software engineers (3-5 people), developed SaaS tool related to financial reporting. Technologies: Kotlin, Spring Boot, PostgreSQL

Transition Technologies PSC

Jul 2017 - Aug 2017

Embedded Software Engineer - Internship

Developed C++ framework, allowing developers to easily create simple sensor/actuator IoT devices based on ESP8266 platform. Technologies: C++, Arduino Framework

Education

Warsaw University of Technology

2020 - 2024
Bachelor's Degree in Computer Science. Specialization: Software EngineeringThesis: Application of microservice architectures in creating scalable web applications

Warsaw University of Technology

2024 -
Master's Degree in Computer Science. Specialization: Intelligent SystemsThesis: Application of large language models (LLMs) for generating Docker and Kubernetes configurations

Skills

Kotlin
Java
Spring Boot
Axon Framework
Apache Kafka
MongoDB
PostgreSQL
Docker
Kubernetes
AWS
TypeScript
React.js
Remix.js
Python
FastAPI
Node.js

Projects

Master's Thesis

PaaS enabling all developers to easily run their apps in cloud using LLMs for generating Docker and Kubernetes configurations.

Thesis Project
Python
Docker
Kubernetes
AI

Bachelor's Thesis

Food ordering system build with microservices, DDD, CQRS and Event Sourcing in mind.

Thesis Project
Kotlin
Spring Boot
Axon Framework
MongoDB
TypeScript
Remix.js

eCommute

Tempting new public transport users with financial benefits e.g. tickets cashback. This app has won the 7th edition of BHL Hackathon.

Hackathon Project
TypeScript
React.js
GraphQL
Next.js
Prisma
MongoDB

RedAlert

System allowing users to send emergency requests (with their location) to appropriate public service based on a series of questions. This app has won Hackathon Idea Kielce 2018.

Hackathon Project
TypeScript
React.js
React Native
Express.js
WebSockets

ReadMe

Mobile app trying to help people keep motivated to read their books using reminders and progress statistics.

Side Project
Java
Android