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Zdenko H.
Prague, Czech Republic
Thanks for looking at my profile.
Please DON'T consider hiring me if:
- you are looking for beginner/mediocre developer who will do the job for you as cheap as possible
- think you are the smartest person in the universe (neither am I)
- don't want to discuss/answer questions, share a wider context about your project. I want to provide my services as I if was your business partner
- my work doesn't create more value for you than your investment in my work
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Here are feedbacks from my previous clients:
"Everything was done perfectly."
"Zdenko has strong Python coding expertise and good architectural knowledge of the Google Cloud Platform. He provided valuable architectural and project guidance. Zdenko was responsive provided excellent documentation with his insights that were valuable."
Zdenko was a great developer to work with. He is very knowledgeable of Google Could Platform and understood the task which needed to be done without excessive guidance.
I would highly recommend Zdenko to anyone looking to develop a data pipeline in the cloud.
"Fantastic person and hard working! He delivered quality work and knew exactly what was needed to complete the job."
Working with Zdenko was incredibly easy, and he produced exactly the results we were looking for. Communication was excellent via messaging on UpWork. I would highly recommend Zdenko.
"Great Job! He knows GAE very well and was able to do everything we asked for.
great python developer. yet again we are going to hire him immediately"
"He let me know exactly what I needed to give him, and he didn't waste any time in getting it done. He also knew to do a couple of things that I didn't explicitly ask him to do when we started, but which clearly needed to be accomplished as part of the larger task."
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During my years as a software consultant, I have realized that communication with the client is most crucial. That's why I make every effort to understand the requirements of the task that's needed to be done, remove ambiguities, make a thorough analysis, suggest a solution, and implement.
For several years now I'm focused on deploying web apps and big data pipelines on Google Cloud Platform and using its products (Google App Engine, Cloud Run, Cloud Functions, Google Compute Engine, BigQuery, Dataflow, etc).
I write about it on my personal page and answer questions on Quora
My expertise is in programming Python web/data applications. I use mostly Django, Flask, Webapp2 frameworks.
Besides that, I have knowledge of other web technologies (HTML, CSS, Javascript...).
I am very open to new challenges and problems. I prefer working on Linux. I am constantly improving my skills and knowledge in all areas.
Experience with scrapping e-shops, real estate websites using BeautifulSoup
I'm not a frontend guru, if necessary I can work with Bootstrap and a little bit of Javascript
- Python
- ETL Pipeline
- BigQuery
- Google App Engine
- Apache Beam
- Google Dataflow
- Google Cloud Platform
- Django
- Flask
- Cloud Spanner
- Big Data
Aleksei L.
Tbilisi, Georgia
Expert in Google Sheets, App Script, Add-ons, Google Cloud and Suite Admin, MS Office VBA automation.
Deep knowledge of MS and Google products, cloud technologies, domains portfolio management, web publishing.
Certified Advanced Google Analytics and Google Tag Manager Fundamentals.
Certified IT professional with extensive background in PM, IT management, development.
- Microsoft Excel
- Google Docs
- Microsoft Office
- Google Apps Script
- Google Sheets
- Data Scraping
- Google Workspace Administration
- Google Forms
- Yandex API
- Map Illustration
- Google Maps API
- Google Maps
- Google APIs
Yurii S.
Kharkiv, Ukraine
Hello there! My name is Yurii and I am a certified Google Cloud Architect and Engineer passionate in Cloud development and Java. I have more than 10 years of commercial enterprise development experience in Java working as a Senior Java Developer and leading a small but efficient team.
During my career, I had developed multiple services and applications from desktop apps to huge standalone web applications and micro-service-based platforms for image processing, studying, etc.
A brief summary of my expertise could be found below.
Programming Languages: Java, JavaScript, TypeScript, Python
Main Technologies: Java SE, Java EE, Spring, Hibernate, JSP, Servlets, AspectJ, AngularJS, Django, Flask
Testing frameworks: JUnit, Mockito, Spock, Geb, Selenium, PowerMock
IDE: Eclipse, NetBeans, IDEA
Application servers: Tomcat, WebLogic, Glassfish, Jetty
OS: Windows, UNIX
DBMS: Oracle, Apache Derby, MySQL, SQLite
Build Tools: Maven, Ant, ivy, gradle
Version Control System: Subversion, git
Management Tools: JIRA, Confluence, Gerrit, ZenHub, GitHub
Additional skills: technical documentation writing, knowledge transferring
CI/CD: Jenkins
- Java
- JavaScript
- Python
- DevOps
- AWS Lambda
- Google Cloud Platform
- ETL Pipeline
- Software Architecture & Design
- API
- Cloud Architecture
- Cloud Computing
- CI/CD
- Solution Architecture Consultation
- Cloud Engineering
Grace M.
Chagrin Falls, United States
Previously Senior Valuations Consultant at a top commercial real estate valuations firm; I have expert-level experience with Argus Enterprise, Excel, financial modeling and projections, and real estate underwriting and valuations.
I also have an intense passion for spreadsheets and automation, and am a Google Sheets expert.
- Financial Modeling
- Microsoft Excel
- Valuation
- Argus
- Real Estate Appraisal
- Real Estate Financial Modeling
- Excel Formula
- Financial Analysis & Valuation
- Business
- Expert
Aliaksandr S.
Poznan, Poland
✅ AWS Certified Solutions Architect
✅ Google Cloud Certified Professional Data Engineer
✅ SnowPro Core Certified Individual
✅ Upwork Certified Top Rated Professional Plus
✅ The author of Python package for cryptocurrency market Currency.com (python-currencycom)
Specializing in Business Intelligence Development, ETL Development, and API Development with Python, Apache Spark, SQL, Airflow, Snowflake, Amazon Redshift, GCP, and AWS.
Accomplished lots of complicated and not very projects like:
✪ Highly scalable distributed applications for real-time analytics
✪ Designing data Warehouse and developing ETL Pipelines for multiple mobile apps
✪ Cost optimization for existing cloud infrastructure
But the main point:
I have a responsibility for the final result.
- Apache Spark
- SQL
- Apache Airflow
- Amazon Web Services
- Python
- ETL Pipeline
- Google Cloud Platform
- Cloud Architecture
- Data Engineering
- Big Data
- Amazon Redshift
- BigQuery
- ETL
- Snowflake
- Data Scraping
Amar K.
Bengaluru, India
I'm a software architect and data engineering expert with over 10 years of proven mastery in building scalable, secure, and high-performance backend and data-driven systems. My deep specialization includes robust data pipelines, sophisticated backend architectures, and strategic cloud solutions. I've successfully led and delivered critical technology initiatives for global industry leaders such as Goldman Sachs, Morgan Stanley, KPMG, and Oracle.
Key Competencies:
- Data Engineering & Databases – SQL (PySpark, Meltano, Oracle, Postgres, MySQL, Redshift, SQL Server, Snowflake, BigQuery), Data Warehousing, query optimization, Kafka, Spark, Airflow, DBT.
- Cloud Platforms – AWS, GCP, Azure, OCI, Kubernetes, Docker, Terraform, CI/CD automation.
- Backend Development – Java, Python (Django, Flask), modern web frameworks, microservices, API integrations.
- Frontend Development – React.js, JSP/Servlets, HTML5, JavaScript (ES6+).
Strategic & Technical Partnership:
I go beyond simply delivering code—I partner with you to deeply understand your business challenges, advise on industry best practices, and implement tailored, future-proof solutions that optimize operations, reduce costs, and accelerate growth.
Client Feedback:
“Amar consistently exceeds expectations—he doesn't just deliver technical solutions, he delivers strategic insights that drive real business results.”
“Highly intelligent and experienced individual with deep knowledge across data engineering.”
“Top performer—will be working with Amar long time I hope!”
If you're looking for a seasoned expert who combines technical mastery and strategic vision, let's connect to discuss how I can help you build impactful, business-driven solutions.
- Java
- Python
- SQL
- Data Engineering
- Apache Spark
- Apache Airflow
- PySpark
- BigQuery
- Amazon Web Services
- Google Cloud Platform
- Big Data
- Software Development
- Google App Engine
- Flask
- API Development
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