Maciej Karpicz
Verified Expert in Engineering
Software Developer
Torun, Poland
Toptal member since May 4, 2018
Maciej is an automation enthusiast who's borderline obsessed with efficiency. Along with his dedication to his craft, he possesses strong analytics and a business-minded approach. As a manager and developer, he delivered projects ranging from small web apps to heavy computer vision-based solutions in healthcare, finance, eCommerce, and education.
Portfolio
Experience
- Mathematics - 10 years
- Python - 8 years
- Management - 7 years
- Django - 4 years
- Agile - 3 years
- Architecture - 2 years
- Docker - 2 years
- Machine Learning - 2 years
Availability
Preferred Environment
Git, OS X, PyCharm
The most amazing...
...discovery I've made was learning about probability theory, which shaped my career and my later view on programming and science.
Work Experience
Django/Python Developer
Toptal Client
- Developed a balanced management system and connected payment providers such as Stripe.
- Integrated one of the KYC providers into the platform, which was one of the key factors in getting clearance from Circle Pay to launch it on the platform.
- Helped with delivering the platform MVP within a tight deadline.
CTO
DLabs
- Cooperated closely with clients during a customer discovery phase, gathering business requirements and transforming them into dev, ML, and DS teams' objectives.
- Focused on identifying real business needs and translating them into specific actions. Chose the tech stack, designed road maps, and scoped work within the projects' budget and resources.
- Scoped machine learning-based projects for the company's clients. Based on that work, over 25 projects were delivered as proof of concept of fully working production systems.
- Designed the architecture along with data pipelines of a web app (based on Django) that simplifies tax settlement processes in Germany. The app used Computer Vision to reduce the time of a single statement preparation statement from 30 to 5 minutes.
- Planned the architecture and worked as a part of the development team that implemented the web ad auditing engine that could efficiently handle incoming traffic of over 6,000 requests per second.
- Worked as part of the team that implemented features for a large eCommerce website, including the coupons system, referrals program, and a home delivery system.
- Built and coached a team of developers and machine learning engineers. Designed career paths and evaluation processes that supported further growth of team members.
Python Developer
For Days, Inc
- Helped to move the eCommerce platform from legacy codebase to the modern frameworks and libraries such as Django and React.
- Proposed to stakeholders an off-the-shelf, Python-based solution for managing all back office activities. This way, we've met a deadline to launch a new platform version.
- Helped with a transition from a subscription-based business model to a one-time purchase business model collaborating with the team.
CTO, Back-end Developer
Diabetes Lab
- Developed both back end and front end and maintained a web application for people with Type 1 diabetes that eases managing their disease; also integrated various data sources, such as devices, APIs, and so on.
- Created an application that was responsible for aggregating data from various fitness trackers, such as Jawbone and Fitbit, and based on the wavelet theory, I was able to detect some health-related patterns.
- Conducted over 100 interviews with customers to understand what are patients' real-life problems based on which team could decide on the next thing to implement.
- Delivered four MVPs, including one mobile application and a web platform. In addition to that, I was responsible for the creation of the R&D plan, connecting with various stakeholders, and scouting talents.
Researcher
Nicolaus Copernicus University
- Coordinated a scientific grant that was awarded by the National Science Center.
- Created an algorithm for computing so-called tilted modules in certain algebraic structures.
- Conducted classes with students, particularly basics of algebra, logic, and first-order logic, which is the basis of SQL.
- Taught the Prolog programming language to students.
- Reviewed scientific papers to ensure publishers' criteria are met.
Experience
Sports Betting Tool
A Python-based app for automating sports bets.
DESCRIPTION
A client wanted to create a product that would help him automate the process of placing bets on multiple bookmakers' sites.
ROLE AND RESPONSIBILITIES
• Translating business needs into technical designs.
• Handling day-to-day coding activities that included architecture design, writing tests and code, and integration with external services.
• Managing technical debt.
ACHIEVEMENTS
• Created over 30 bots that could perform multiple actions.
• Automated over five business processes of different complexities.
• Introduced good coding standards.
Tax Settlement App
One of the things we were the proudest of was suggesting to the client a web-based person authentication tool - Onfido that, taking into account business context and law in Germany, was a novel idea allowing further automation of the whole process.
Education Platform for Entrepreneurs
A Python and Javascript-based education platform.
DESCRIPTION
A client was building a product that was a content-rich education platform for entrepreneurs living in rising markets, such as Vietnam and Cambodia. The client wanted to put a strong focus on high-quality video-based content.
ROLE AND RESPONSIBILITIES
• Handling day-to-day coding activities that included architecture design, writing tests and code, and integration with the front-end application.
• Managing technical debt.
• Gathering business requirements from all stakeholders.
AI Student Advisor
Education
PhD in Mathematics
Nicolaus Copernicus University - Toruń, Poland
Skills
Libraries/APIs
Django ORM, REST APIs, Stripe API, PayU API, Asyncio, SQLAlchemy, Flask-RESTful, Amazon Rekognition, jQuery, Jira REST API, Facebook API, React, Twilio API, Requests, PayPal API, SendGrid API, TensorFlow, Telegram Messenger API, Mypy, Stripe
Tools
RabbitMQ, LaTeX, NGINX, Jira, Bitbucket, Docker Compose, PyCharm, Maple, Confluence, Celery, Git, cURL Command Line Tool, Apache, GitHub, Ngrok, CircleCI, GitLab CI/CD, Mailchimp, ShipStation, AutoML, Pytest
Languages
Python, Python 3, TeX, HTML5, CSS, SQL, Prolog, PHP, CSS3, JavaScript, TypeScript, Rust
Frameworks
Django REST Framework, Flask, Django, Selenium, Bootstrap, Angular, React Native
Paradigms
Agile, REST, Continuous Integration (CI), Management, Scrum, Unit Testing, Continuous Delivery (CD), Test-driven Development (TDD), Agile Software Development, Object-oriented Programming (OOP), DevOps
Platforms
Docker, Google Cloud Platform (GCP), Amazon EC2, Amazon Web Services (AWS), Debian, OS X, AWS Lambda, Blockchain
Storage
Amazon S3 (AWS S3), PostgreSQL, JSON, MySQL, Redis, SQLite, Docker Cloud, Google Cloud
Other
Mathematics, Architecture, Machine Learning, Software Architecture, Customer Discovery, CTO, APIs, Containerization, Algorithms, Web Scraping, Data Scraping, Web Development, FastAPI, Code Architecture, MLflow, Business Analysis, HAProxy, DNS, Gunicorn, Tesseract, API Integration, Multiprocessing, Full-stack, Front-end, Data Cleaning, OpenAI GPT-4 API, OpenAI, Retrieval-augmented Generation (RAG)
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