Krzysztof R.
Senior Backend-utvikler
Krzysztof er en senior backend-utvikler med 16 års forretningsbakgrunn, som viser allsidighet på tvers av sektorer som detaljhandel, luftfart, FinTech og e-handel.
Han har samarbeidet mye med internasjonale team, spesielt innenfor regionen Sentral- og Øst-Europa (CEE) og USA.
En nøkkelprestasjon i karrieren hans er utviklingen av FlyForm-applikasjonen, som reduserte papirbruk for arbeidsbeskrivelser opprettet av teknikere. Krzysztof har også erfaring med teamledelse, og gir ledelse, veiledning og støtte for å sikre vellykket levering av programvareløsninger av høy kvalitet.
Hovedekspertise
- Git 13 år
- JavaScript 12 år
- MariaDB 10 år
Andre kunnskaper
- Vagrant 8 år
- Android 5 år
- Bootstrap 5 år
Utvalgt opplevelse
Arbeidserfaring
Senior Backend Developer
Proxify AB - 5 months
Customer: PI Electronique
Worked with portfolio of applications in the food/catering/hotels sector.
Developed applications for restaurant, cafeteria, and hotel management, covering menu, stocks, payments, and online orders.
Utilized NodeJS, Javascript, MySQL, and MongoDB to develop and maintain backend applications.
Created new features and integrated external providers like Deliveroo and Uber.
Achieved seamless import of allergen information for existing dishes from different systems, actively participated in bug fixing, and improved documentation.
Worked with migration of application for POS configuration application from PHP to Node.JS, TS, React
Teknologier:
- Teknologier:
- JavaScript
- MySQL
- Node.js
- REST API
- TypeScript
Senior Software Developer
Doradca.it - 5 years 11 months
Project: Airport Operations Application
Developed an application designed to manage airport and terminal operations, including landings and take-offs, airplane turnaround operations, stand devices, and flight lists. Through the implementation of this project, communication for the client was greatly simplified and streamlined;
Constructed the backend of the system utilizing the Nest.js framework, harnessing the advantages of JavaScript and Typescript;
Established communication channels based on Web Sockets and a RabbitMQ queue. Deployed an application that was fully containerized and capable of running in Docker and Kubernetes environments;
Successfully migrated Cap'n proto and GraphQL interfaces to RabbitMQ, resulting in a notable performance enhancement;
Teknologier:
- Teknologier:
- JavaScript
- Node.js
- RabbitMQ
- REST API
- TypeScript
- Docker
- API
- GraphQL
- Nest.js
- Kubernetes
- Scrum
- Agile
- Jira
Senior Software Developer
Doradca.it - 5 years 11 months
Project: Autonomous store gate opener
Successfully developed an application that allowed customers of an autonomous store to authorize themselves and gain access to the store by opening the gate;
Developed the backend using Node.js, and Nest.js, and implemented communication through Web Sockets and REST APIs;
Integrated a QR code reader for employee access and POS terminal interaction via the REST API;
Created the frontend using Angular, incorporating Web Sockets and REST APIs for seamless communication;
Implemented QR code reader functionality for customer authorization;
Established communication between the application and customer backend microservices via REST APIs;
Utilized the microservices to recognize returning customers, initiate shopping sessions, and ultimately open the store gate;
Teknologier:
- Teknologier:
- Node.js
- REST API
- API
- Nest.js
- Microservices
Senior Software Developer
Doradca.it - 5 years 11 months
Project: Poppy Platform
Spearheaded the development of the Poppy Platform, utilizing Typescript, JavaScript, PHP, and SOAP, which served as a solid foundation for building applications targeting different asset-related processes. The platform significantly enhanced the client's performance and efficiency;
Constructed a platform consisting of two parallel applications: a full backend and frontend application for user interaction, and an API proxy that facilitated the translation of various sources and integrations into the internal application API;
Developed the project with the aim of creating applications that would effectively manage service processes for a company specializing in ATM and EFTPOS devices;
Engaged in software development activities employing Symfony, Docker, Bootstrap, REST APIs, and WebSockets;
Contributed to IT analysis, integration tasks, process optimization and digitization, web and mobile application development, IT consulting, cloud solutions, and the migration of processes and ideas to the cloud;
Teknologier:
- Teknologier:
- JavaScript
- PHP
- REST API
- Symfony
- TypeScript
- Docker
- API
- Soap
- Bootstrap
- AWS
Software Development Manager
Diebold Nixdorf - 2 years 9 months
Project: Cinderella Web Application
Successfully delivered an internal application that facilitated daily business functions encompassing ticket management, complaint handling, warehouse management, commissioning activities, settlements, invoicing, SLAs, and KPIs. Throughout its lifespan, the application's performance was significantly enhanced through the adoption of different tools and methodologies;
Responsible for managing a team of 7 people for the development of the project;
Led the development of the Cinderella Web Application, employing PHP and MariaDB, along with JavaScript, OpenStreet maps, and REST APIs;
Implemented various technologies in software development, including Node.js, Symfony, Vagrant, Docker, RabbitMQ, and Typescript;
Seamlessly integrated the project with diverse external applications such as Oracle Siebel CRM, SAP, SMS Service, and Service Now;
Utilized Git as the version control system for the project;
Teknologier:
- Teknologier:
- Git
- JavaScript
- MariaDB
- Node.js
- PHP
- RabbitMQ
- REST API
- Symfony
- TypeScript
- Docker
- Vagrant
- API
Software Development Manager
Diebold Nixdorf - 2 years 9 months
Project: Cinderella Mobile
Developed an Android application designed specifically for technicians, and employed Java and Node.js technologies in the creation of the application;
Utilized Git as the version control system for the project;
Developed the application to facilitate reporting of appointments, work times, consumed materials, and attachments;
Implemented software development utilizing JavaScript and RESTful APIs;
The application was launched on the Play Store, making it readily accessible to users, and was widely adopted by over 150 technicians nationwide;
Teknologier:
- Teknologier:
- Git
- REST API
- API
- Android
Software Development Manager
Diebold Nixdorf - 2 years 9 months
Project: FlyForm
The FlyForm application enabled technicians to collect signatures, resolution notes, and photos, generate easily readable PDF documents, and gather valuable data for future use;
Successfully delivered a mobile application that became an integral part of the daily routines of over 150 technicians nationwide;
Utilized Java and Node.js technologies in the creation of the application;
Developed the project as a digital alternative to traditional paper forms, effectively serving as proof of work;
Employed JavaScript and RESTful APIs in the software development process. Utilized Git as the version control system for the project;
Teknologier:
- Teknologier:
- Git
- REST API
- API
- Android
Project Manager
Wincor Nixdorf - 9 years 11 months
Responsible for managing different projects in the EFTPOS service division;
Executed pin pad upgrades and replacements in adherence to EMV standards and methods;
Coordinated daily installations, dismantlings, swaps, and merchant training activities nationwide;
Formulated an internal service application to facilitate smooth business operations;
Constructed the application utilizing PHP and MySQL, incorporating JavaScript, OpenStreet maps, and REST APIs;
Successfully developed and deployed an internal application to enable headquarters employees to track fundamental data pertaining to ongoing tickets;
Teknologier:
- Teknologier:
- Git
- JavaScript
- MariaDB
- MySQL
- Node.js
- PHP
- RabbitMQ
- REST API
- Symfony
- TypeScript
- Docker
- Vagrant
- API
- Project management
Utdannelse
BSc.Computer Networks
WIT · 2003 - 2008
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