toptal.com
Contact us: +1.888.604.3188
Winicjusz Szyszka, Software Developer in Chojnice, Poland
Winicjusz Szyszka

Software Developer in Chojnice, Poland

Member since July 13, 2018
Winicjusz started out as a Java developer but found that Python suited him better. He began with extending existing apps and then later built systems from scratch. Seven years later, Winicjusz is now a senior Python developer and team leader. Currently, the bulk of his work is on the back-end of web systems. His notable accomplishments include building the Home Arrest System and a threat intelligence system for large telecom operator in Poland.
Winicjusz is now available for hire
Hire Winicjusz

Portfolio

  • Comp S.A.
    Swagger, Sentry, StatsD, Twisted, Jinja, MQTT, RabbitMQ, HTML, Pytest...
  • Quantime.ai
    AWS S3, Jinja, HTML, Pytest, Requests, JSON, Unit Testing, Scalability...
  • Pubfront
    AWS S3, Sentry, GitLab CI/CD, HTML, Requests, Unit Testing, Code Review...

Experience

Location

Chojnice, Poland

Availability

Part-time

Preferred Environment

VirtualBox, GitLab CI/CD, Vagrant, Git, Linux, PyCharm

The most amazing...

...thing I've done was to develop the Home Arrest System from scratch.

Employment

  • Senior Python Developer

    2015 - PRESENT
    Comp S.A.
    • Built from scratch a type of cybersecurity software for one of the biggest telecom operators in Poland.
    • Developed IP Tracker, a tool for connecting IP addresses with customers identifications in real-time. It was written in Python on top of Redis, Elasticsearch, and PostgreSQL.
    • Constructed a management interface called TM. It allows the management of IP Tracker, provisioning other services and tracking customers.
    • Made simple captive portals in HTML, JavaScript, and Tornado for the back-end (with Redis as a database).
    • Led a small team of 2-3 junior/mid developers and also reviewed their code.
    • Created, with a team, a monitoring system using StatsD with InfluxDB and Grafana.
    • Prepared the software architecture for all the applications.
    • Prepared a Kibana plugin using React.
    Technologies: Swagger, Sentry, StatsD, Twisted, Jinja, MQTT, RabbitMQ, HTML, Pytest, Requests, JSON, Unit Testing, Scalability, Code Review, Concurrency, YAML, Web Services, Back-end Development, Microservices, Git, Test-driven Development (TDD), NoSQL, SQLAlchemy, SQL, Django REST Framework, React, Kibana, Celery, JavaScript, Tornado, Django, Redis, PostgreSQL, Elasticsearch, PyPy, Python

  • Back-end Developer

    2019 - 2020
    Quantime.ai
    • Extended the existing Django app.
    • Created new modules.
    • Added new functionalities.
    • Integrated Trello, SendGrid, Stripe, Nylas, and Here.com (geolocation).
    Technologies: AWS S3, Jinja, HTML, Pytest, Requests, JSON, Unit Testing, Scalability, Code Review, Concurrency, Back-end Development, Git, Test-driven Development (TDD), SQL, Django REST Framework, SendGrid, Stripe, PostgreSQL, Django, Python

  • Senior Django developer

    2019 - 2019
    Pubfront
    • Upgraded an old Django app to the newest Django version.
    • Rebuilt database models structure to work better with new products.
    • Upgraded a Boto library to the newest version.
    • Added code for getting data from an external API.
    • Upgraded the Celery version from 3 to 4.
    • Implemented front-end changes (HTML and JavaScript).
    Technologies: AWS S3, Sentry, GitLab CI/CD, HTML, Requests, Unit Testing, Code Review, Back-end Development, Git, SQL, PostgreSQL, Django, Python

  • Freelance Python Developer

    2018 - 2018
    Freelance Work
    • Constructed the back end for an Australian site where a user can check VIN numbers.
    • Created the API for receiving search requests and verifying Stripe payments.
    • Developed a client for connecting to a PPSR web service.
    • Enabled email sending using SendinBlue.
    • Ran asynchronous tasks using Azure Queue.
    • Prepared scripts to run all processes as services.
    • Fixed bugs for CoinAfrique.
    Technologies: Web Services, SQL, Django REST Framework, Stripe, Zeep, Azure, Django, Python

  • Software Developer

    2011 - 2015
    Enigma SOI
    • Constructed the server part of the Home Arrest System. It was a web service created in Python on top of a PostgreSQL database.
    • Developed a mail archive for Microsoft Exchange mailboxes. The back-end part was written in Python on top of the PostgreSQL, the proxy was built in .NET, and the front-end was created using Bootstrap.
    • Created a type of software in Lua for the hardware section of the home arrest system. This part was responsible for collecting events and keeping communication with a central server.
    • Optimized the Django applications which improved the cache, loaded data to user sessions in the background, and optimized the data processing.
    • Wrote Jython scripts for processing telecom data which enabled the processing data faster than using database joins.
    • Implemented minor extensions/bugfixes for the site, Cencert.pl; concerning the front and back end.
    • Extended a Thunderbird extension for encrypting/decrypting emails; used C++.
    • Built a service bus which received data from our applications and passed it to Oracle Service Bus. It was written using Apache Synapse.
    • Helped prepare the software architecture.
    Technologies: Mercurial, Jinja, MQTT, RabbitMQ, HTML, Pytest, Requests, JSON, Unit Testing, Code Review, Jython, Web Services, Cryptography, Back-end Development, Test-driven Development (TDD), NoSQL, SQLAlchemy, SQL, PostgreSQL, .NET, C++, Java, Lua, Django, Python

Experience

  • IP Tracker (Development)

    I developed IP Tracker, a tool for connecting IP addresses with customers identifications in real time.

    IP Tracker is capable of receiving data from different data sources and enables searches in real time. It combines data from different data streams to provide full results. There are over 200,000 records per second in one data stream and about 2,000 records in the other one.

    Technologies: Python, Redis, Elasticsearch, PostgreSQL

  • Simple Captive Portals (Development)
    https://alert.cert.orange.pl/A/25cb7b0ea2314a5bb49a0f6bacb858a9/

    I built simple captive portals in HTML, JavaScript, and Tornado for the back-end (with Redis as a database). A sample site can be seen at the link.

Skills

  • Languages

    Python, SQL, PyPy, Lua, Java, C++, Jython, YAML, XML, JavaScript, HTML

  • Frameworks

    Django REST Framework, Django, .NET, Alembic, Jinja, Twisted, CSSS, Swagger

  • Storage

    Elasticsearch, NoSQL, Redis, PostgreSQL, JSON, AWS S3

  • Other

    Back-end Development, Mockups, Scalability, Code Review, Tornado, Concurrency, Web Services, Zeep, StatsD, Cryptography

  • Libraries/APIs

    Requests, SQLAlchemy, Stripe, React

  • Tools

    Vagrant, Celery, Git, Pytest, PyCharm, Mercurial, Kibana, SendGrid, SendinBlue, VirtualBox, Sentry, GitLab CI/CD, RabbitMQ, MQTT

  • Paradigms

    Test-driven Development (TDD), Microservices, Unit Testing

  • Platforms

    Linux, Azure, Windows, CentOS, Debian

Education

  • Master's degree in Computer Science
    2004 - 2013
    Warsaw University - Warszaw, Poland

Certifications

  • Elastic Certified Engineer
    MARCH 2020 - MARCH 2022
    Elasticsearch

To view more profiles

Join Toptal
Share it with others
Hire the top 3% of freelance developers TM