Patryk Siemiński

Basic

Bis 2022, Senior Full Stack Engineer, Siili Solutions

Szczecin, Poland

About me

Senior Software Engineer with bachelor's in computer science and 7+ years experience in delivering backend and frontend projects for both corporate and startups. With over 4 years of experience in eCommerce, strong with Java, Go, PHP, TypeScript, JavaScript, React.

Skills

Software Development
Java
Go
JavaScript
TypeScript
React
React.js
Redux
Redux.js
Spring
Spring Boot
Spring Framework
Hibernate
PHP
NoSQL
MySQL
PostgreSQL
MongoDB
Memcached
Redis
Elasticsearch
Apache Kafka
RabbitMQ
AWS
Amazon Web Services (AWS)
SQL
GraphQL
REST
REST API
RESTful API
Microservices
Redux-saga
JMS
DDD
Test Driven Development (TDD)
JUnit
Jest
Entgo
Gqlgen
eCommerce
E-Commerce
Back-end
Frontend
Message Queueing
Full-stack development
Solr
Docker
GCP
Kubernetes
Software

Timeline

Professional experience for Patryk Siemiński

  • 7 months, Aug 2021 - Feb 2022

    Senior Full Stack Engineer

    Siili Solutions

    Airport Awareness project leadership - Oversaw the product discovery phase, planned and delivered a subproject for the airport awareness system app. - Led the project team, ensured obstacles-free work and mentored less experienced engineers. - Gathered requirements and designed the integration of new backend service into existing distributed system. - Developed and implemented a new module in React and React Native apps with introduction of hooks API.

  • 1 year and 10 months, Nov 2019 - Aug 2021

    Senior Java Software Engineer

    Pierce AB

    E-commerce - Led the backend implementation of the new discounts and campaigns module with kick-off during the 2020 Black Friday campaign, which led to time savings of marketing and pricing departments and conversion growth. - Refactored and improved functionality to match complex combinations of bundled products with customers motorbikes, leading to better conversions and a lower number of returns caused by a mismatch of bought parts. - Mentored new back-end engineers, worked together by pair programming.

  • 1 year and 5 months, Jun 2018 - Oct 2019

    Senior Full Stack Engineer

    IAMIP

    Intellectual property - Accelerated growth of functionalities in company products during the intensive period in the startup's lifecycle, which led to obtaining many new valuable customers and enterprise subscriptions. - Developed new features and maintained the existing codebase in multiple microservices of an intellectual property app. - Refactored the codebase by introducing good practices like TDD, layered architecture and elements of DDD, which led to quality improvement of the code & product.

  • 10 months, Sep 2017 - Jun 2018

    Software Engineer

    Squiz

    CRM systems - Developed and maintained projects for a UK branch in the field of CRM systems. - Improved functionalities of automatic email content parsing and categorization for further processing and collaboration by end-users of the platform.

  • 2 years and 2 months, Jul 2015 - Aug 2017

    Software Engineer

    IdoSell (IAI S.A.)

    E-commerce - Developed and maintained the IdoSell platform used by thousands of stores globally. - Implemented or improved various integrations with external systems like PayPal, eBay, and Allegro. - Led the development of a new service collecting and presenting discounts and campaigns from thousands of stores running on the IdoSell platform.

Languages

  • English

    Fluent

  • Polish

    First language

Wants

Remote jobs
Freelance projects
Full-time roles
Part-time jobs
Job offers

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