Rafał Kalinowski

Man of many interests, with deepest love for IT. Specializing in backend and data & systems integration technologies. Web3 contributor (full stack and Smart Contracts), Code4Arena warden & Developer DAO member. Passionate about Linux, programming and language learning. Open-minded, people person.

Experience

Full Stack Web3 Dev | IDriss (part time)

2022-06 ⇒ actually

  • Writing new smart contracts & developing existing ones
  • Developing SDK for other developers to use
  • Developing internal & public full stack codebases

Full Stack Integration Engineer | contractor for Allegro

2020-01 ⇒ actually

  • Full stack (Java + React/Angular) development
  • Designing whole system architecture for new integration stack
  • Designing & development of integration data pipelines
  • On-call Linux admin support for integration platform
  • Building inhouse developer tools (cron event scheduler, utility dashboard, graphical code generation tool)

Integration Engineer | contractor for Bunge

2018-07 ⇒ 2019-12

  • Development and maintenance of interfaces based on TIBCO BusinessWorks, Web Services, Active Database (ADB) and SAP Adapters; integrating ERP and CRM systems
  • Cooperation with business users and providing L3 support
  • Implementation and maintenance of CI / CD pipeline
  • Working in an international environment, realizing projects with teams from Asia, Europe and America
  • Building inhouse developer tools (e.g. event scheduler, log processor)

Android app developer (part time)

2017-02 ⇒ 2018-02

  • Implementing mobile coaching app for Android platform in Java

Integration Engineer | contractor for Roche

2015-02 ⇒ 2018-07

  • Development and maintenance of interfaces based on TIBCO BusinessWorks, BusinessConnect, Web Services, Active Database (ADB) and SAP Adapters; integrating ERP and CRM systems based on specification
  • Preparation of technical documentation
  • Development of internal tools written in Scala
  • Cooperation with business users and providing L3 support
  • Implementation and maintenance of utilities for Tibco BW and EAI platform in Java and Scala
  • Working in an international environment, realizing projects with teams from Asia, Europe and America

Master of Ceremonies | JokeR

2009-06 ⇒ 2018-09

  • leading wedding receptions and playing guitar

Education

Software Engineering

2014 ⇒ 2019

Warsaw School of Information Technology

English philology

2011 ⇒ 2014

English Teaching College in Ostrołęka


Abilities

Languages

🇵🇱 Polish native

🇺🇸 English business fluency

🇪🇸 Spanish intermediate

🇷🇺 Russian beginner

Interests

🐧 Linux

🥁 Playing musical instruments

Language learning

Web3 technologies

Economics

Key achievements

🏅 🏆🏆🏆 2022 ETHOnline global hackaton finalist (14 finalists out of 360 participating teams): Turbo-DIPaaS project

🏅 Speeding up business critical data processing pipeline ~1500x (from 2 hours to 5 seconds)

🏅 Creating many tools used internally by teams (CI/CD pipelines, logs and management utilities, event schedulers, automation tools, etc.)

🏅 Development of high-volume clinical data transfer solution

🏅 Development of Data Sourcing solution with MongoDB clusters harmonizing millions of requests daily

Skills

EAI Technologies: Tibco BW Suite, EMS, BusinessConnect, Sterling B2B Integrator

Languages (from best to worst fluency): Java, TypeScript, Solidity, Kotlin, SQL, Go, C++, Bash, Haskell, Scala

Frameworks: React, Angular, SolidJS, ChakraUI, SemanticUI, Bootstrap, Spring, NodeJS, GraphQL

Tools: Kubernetes, Docker, Bamboo, GitHub Actions, Hardhat

Distributed Systems communication protocols: Kafka, Hermes, RabbitMQ, ElasticSearch, Apache Pulsar, JMS


Side projects

Turbo-DIPaaS - 🏆 winning project for ETHOnline 2022. No code Web3 integration project. TypeScript, NodeJS, React

IDriss - contributing to IDriss - Web3 swiss-knife for non crypto-native people. TypeScript, Solidity, Hardhat

Live EVM Debugger - tool allowing for debugging, tracing and simulating on-chain transactions (work in progress). TypeScript, SolidJS, GraphQL, Hardhat

SupplyChain - simple online shop and blockchain based supply chain (work in progress). Solidity, Go, TypeScript, React, Hardhat