Jan Cz.

BA / Developer

Experience (B2B/Freelance)

(*) Information cannot be revealed yet due to the non-disclosure agreement.

BA / Developer

[PL][Industry] Company 1 (*)
2012+
PHP 7+, MSSQL 2019/2022, R, VBA, UI

Objectives:

  • Prepare reports/analytics (BI) in R about sales & system usage for Executive Board
  • Prepare security audits for sales system and hardening it.
  • Maintain & improve sales/logistic/administration system in PHP + vanilia WebStack.
  • Prepare Excel's integration with PHP EndPoints in VBA. (live acess control list, multilang, logs, stats,..)
  • Migration from php v5.3 to v7/8.
  • Optimize DB speed & struct & hardening (procs, roles, logs, b-tree, watchdogs, ...)
  • Co-Op with internal depratments (IT, Sales, Production) & customers

BA / Developer / CyberSec

[PL][HighTech] Company 2 (*)
2016+
C#, R, Python 3, WebTech, UI - WPF/WinF

Objectives:

  • Develop & maintain software/solutions in C#, Py (scripts), R, WebTech.
  • Create integrations for ActiveDirectory and similar solutions.
  • Develop Multi-Threaded data processing parts.
  • Integrate external devices/services/endPoints with software in C#.
  • Co-op with customers/suppliers.

R&D BA/Developer

[FR][High-Tech (Strategic)] Company 3 (*)
2017-2023
C, C#, R, PS, Python3 (Pandas, FastAPI), UI - WPF/WinF, NoSQL (LiteDB)

Objectives:

  • Prepare theoretical/math models (eg. piezo calibration - first order) in R & Py3. Research & validation with enterprise-standard version delivery.
  • Develop Multi-Threaded/RealTime/TimeCritical data processing parts.
  • Maintain and develop software & scripts in C#, PS for AFM (Atomic forces microscopy) & dataSets in NoSQL/LocDB
  • Obfuscate & hardening software and embedded(HW) part.
  • Works with equipment and provide intial tests in C/C# for embedded (HW) part.
  • Co-op & fulfil international customers requirements.

Developer

[USA] Private Business
2018+
Processing v3+ (subset of Java), C

Objectives:

  • Apply computational geometry solution (eg. intersections, rays, scale, colision detection, open/close shape etc.) & path optimizations.
  • Develop and maintain soft in processing 3 for fabric prints and hardware part in C.
  • Migration from Processing v3 to v4.
  • Integrate hardware with software.

TechStack

Core

  • C# /.NET 3.5+, 8
  • Java 11+
  • Python 3
  • VBA
  • R
  • Others C-like langs
  • F#

WEB

  • PHP 7.0+
  • Angular/React

DB

  • MSSQL 2019+ / MariaDB
  • NoSQL/Neo4j
  • PGSQL

Academic Ops

  • Diploma/Pub
    Poznan's Train Traffic Optimization
    2024-2025-02
  • Group Project
    Anonymous Surveys (TOR) - TeamLeader
    2024-2025-02

Languages

  • English (B1)
  • French (A1/2)
  • German (A1/2)

Interests

  • Equitation
  • Optimization
  • Self-learn/improvements
  • Mountain trips