Available for junior roles · Remote

Antoni
Gruba

Mobile & Data Engineer. I build apps that ship and pipelines that think. Final semester CS student at University of London.

View Projects Get in Touch
3+
Years professional experience
1
App on Google Play Store
82%
Computer Science BSc avg. grade
Antoni Gruba
About

Who I am

I'm a Computer Science BSc student in my final semester at the University of London (Goldsmiths), currently based between Sosnowiec, Poland and Bangkok, Thailand.

My work sits at the intersection of mobile development and data engineering. I've built and shipped a native Android climbing gym discovery app to the Google Play Store, and I complement that with practical data science skills - Python pipelines, SQL analytics, and hands-on AI/NLP projects.

I've worked professionally as a Virtual Operations Manager, building sales dashboards and automating workflows with Python, and as a Top Rated Plus freelance translator on Upwork with a 100% job success rate. I enjoy building things that are useful and shipping them into the world.

Outside of tech: rock climbing, filmmaking, photography, and learning languages.

🎓
Education
BSc Computer Science, University of London (Goldsmiths) - Final Semester
📍
Location
Sosnowiec, Poland · Bangkok, Thailand · Remote-only
🗣️
Languages
Polish (Native) · English (C2) · Spanish (B1)
📄
Looking for
Junior Mobile Engineer or Data Engineer roles · Remote
Work

Projects

Climbing Gym Discovery App screenshots
📱 Mobile · Published

Climbing Gym Discovery App

A native Android app for discovering and exploring climbing gyms. Built with a React Native frontend and a Next.js backend. Published on the Google Play Store.

React Native JavaScript Next.js Android
▶ Google Play Store ↗ (soon) ⌥ GitHub (private - request access)
Event Management Web App screenshots
🌐 Full-Stack

Event Management Web App

Full-stack event booking platform with dual user roles. Organisers create, edit and publish events. Attendees browse and book tickets with tiered pricing and real-time inventory tracking.

Next.js Node.js JavaScript SQL
⌥ GitHub (private - request access)
Evolution algorithm and graph screenshots
🧬 AI · University

Evolutionary Algorithm: Creatures Climbing Sim

AI creatures evolving to climb a mountain through genetic algorithms. Designed 10+ fitness function variants and optimised hyperparameters across multiple training runs. Graded with distinction.

Python NumPy Genetic Algorithms Physics Simulation
⌥ GitHub (private - request access)
Career

Experience

Mar - Sept 2025
Balloon Dude
Virtual Operations Manager
Built sales analytics dashboards using Python (pandas) and Excel. Automated repetitive workflows, delivered data-driven recommendations on stock and scheduling, and contributed to UX audits and website optimisation.
Aug 2024 - Present
Upwork · Freelance
Polish-English Translator & Localisation Specialist
Top Rated Plus freelancer with 100% job success rate. Managed high-volume projects including a 7-month ongoing contract. Specialised in e-commerce localisation (2,000+ product descriptions), technical documentation, and legal content.
Dec 2022 - Jan 2024
mBank S.A.
Settlement Operations Analyst
Validated transaction accuracy across banking and ATM systems during year-end reconciliations. Identified and escalated discrepancies in high-volume settlement data under tight seasonal deadlines.
Technical

Skills

Mobile
React Native JavaScript Android Studio Google Play Store
Backend & Web
Next.js Node.js SQL HTML CSS
Data & AI
Python pandas NumPy scikit-learn Jupyter
Other Languages
C++ C# Unity
Tools
Git / GitHub Excel Power BI Canva
Certifications
IBM Python for Data Science IBM AI Engineering Google IT Support IELTS (7.5)
Say Hello

Get in touch

I'm currently looking for junior Mobile Engineer or Data Engineer roles - remote only. If you have an opportunity, a project, or just want to chat, feel free to reach out.

I typically respond within 24 hours.

✉️
Email
[email protected]
💼
LinkedIn
linkedin.com/in/antoni-gruba
🐙
GitHub
github.com/ubantpy
⭐
Upwork
Top Rated Plus · 100% JSS
Antoni Gruba
Mobile & Data Engineer · Computer Science BSc (Final Semester)
[email protected] +48 500 839 396 antonigruba.work github.com/ubantpy linkedin.com/in/antoni-gruba Sosnowiec, Poland · Bangkok, Thailand · Remote
Summary
Computer Science BSc student (final semester, University of London) with production-ready mobile development experience. Built and shipped a native climbing gym discovery app for Android. Complemented by practical data science expertise: Python/pandas data pipelines, SQL analytics, and NLP/AI project completion. Proven ability to bridge full-stack development with data-driven decision-making. Seeking a Mobile Engineer or Data Engineer role where I can build scalable, intelligent applications.
Work Experience
Virtual Operations Manager
Mar 2025 - Sept 2025
Balloon Dude
  • Leveraged Python (pandas) and Excel to build sales analytics dashboards and identify SKU performance trends.
  • Automated repetitive workflows using scripts (content metadata processing, reporting).
  • Delivered actionable recommendations on seasonality, stock levels, and scheduling.
  • Contributed to product improvements, UX audits, and website optimisation.
Polish-English Translator & Proofreading Specialist
Aug 2024 - Present
Upwork · Freelance
  • Top Rated Plus freelancer with 100% job success rate.
  • Managed high-volume translation projects, including a 7-month ongoing contract with a single client.
  • Specialised in e-commerce localisation (2,000+ product descriptions), technical documentation, and legal content.
Settlement Operations Analyst
Dec 2022 - Jan 2023, Dec 2023 - Jan 2024
mBank S.A.
  • Validated transaction accuracy across banking and ATM systems during year-end reconciliations.
  • Identified and escalated discrepancies in high-volume settlement data.
  • Supported critical year-end close processes under tight deadlines.
Projects
Climbing Gym Discovery App
React Native · JavaScript · Next.js
Native Android app for discovering and exploring climbing gyms. Published on the Google Play Store.
▶ Google Play Store ↗ (soon)
Climbing App
Event Management Web App
Next.js · Node.js · JavaScript · SQL
Full-stack booking platform. Organisers create, edit, publish events. Attendees browse and book with real-time inventory and tiered pricing.
⌥ GitHub (private - request access)
Event management web app
Evolutionary Algorithm: Creatures Climbing Sim
Python · NumPy · Genetic Algorithms
AI creatures evolving to climb mountains through genetic algorithms. Designed 10+ fitness function variants, optimised hyperparameters. Graded with distinction.
⌥ GitHub (private - request access)
Evolution algo
Education
Bachelor of Science in Computer Science (Avg. grade: 82%)
Sept 2023 - Present
University of London, Goldsmiths, UK
High School with Extended Mathematics, Physics & Informatics
2019 - 2022
IX Liceum Ogólnokształcące in Sosnowiec, Poland
Technical Skills
Mobile
React Native JavaScript Android Studio
Backend & Web
Next.js Node.js SQL HTML CSS
Data & AI
Python pandas NumPy scikit-learn Jupyter
Other
Git / GitHub Excel C++ C# Unity
Additional Information
Languages: English (C2), Polish (Native), Spanish (B1)
Certifications: IBM Python for Data Science, IBM AI Engineering & Data Science, Google IT Support, IELTS
Interests: Rock climbing, filmmaking, photography, languages, travel
Volunteering: Great Orchestra of Christmas Charity (2019-2021), Workaway (07-11.2022)