Aliaksandr Valshtein
Verified Expert in Engineering
Python Developer
Tel Aviv-Yafo, Israel
Toptal member since February 10, 2022
Aliaksandr is a Senior Python backend engineer with 9 years of experience building production services, data pipelines and AI/ML infrastructure, from TensorFlow model serving and NVIDIA GPU containers to gRPC microservices on Kubernetes. He has a track record of reviving ownerless legacy code and stabilizing failing services, including a 60% cut in a service’s memory use and ~10× faster deployments. Strong in system design, parsers and data processing, CI/CD, Docker and AWS/Azure.
Portfolio
Experience
- Linux - 8 years
- FastAPI - 5 years
- Python 3 - 4 years
- Flask - 4 years
- Docker - 3 years
- Django - 3 years
- PyCharm - 3 years
- Django REST Framework - 2 years
Preferred Environment
Linux, Ubuntu Linux, PyCharm, Python 3, Flask, Django, FastAPI, Django REST Framework, Docker, SQLAlchemy
The most amazing...
...thing I've created is a a pure-Python RTF parser covering a substantial part of the RTF 1.9.1 specification
Work Experience
Senior Python Developer, AI Group
Vimeo
- Cut a microservice’s memory consumption by 60%, bringing out-of-memory pod failures to near zero and eliminating a recurring class of production incidents.
- Built a documented, interactive CLI for working directly with gRPC microservices, replacing an undocumented legacy script and improving developer efficiency.
- Restored broken email notifications in a legacy microservice, bringing back critical customer-communication workflows.
- Implemented URL signing for cloud storage links in-house, meeting the feature deadline while a blocked dependency upgrade was being resolved.
Senior Python Developer
Beaconcure
- Designed a grammar-based (PEG) parser over arbitrary object sequences that turns structured medical-study data into the object model consumed by AI models, replacing manual parsing and shortening the onboarding of new study types.
- Built a pure-Python RTF parser covering a substantial part of the RTF 1.9.1 specification, replacing a fragile regex-based extractor.
- Revived an ownerless legacy component into a working part of the codebase, avoiding a from-scratch rewrite of the feature.
Senior Python Developer
Hiveomics LTD
- Developed a web scraping tool/API for an analytics service that did not provide web API.
- Created an ETL job to collect data from Google Analytics, transform it to the desired format, and store it in the database, CSV, or XLSX file by choice.
- Built a web scraping tool/API to compare historical site rankings taken for an analytics service that did not provide web API.
- Created and managed an analytical dashboard in Grafana.
- Optimized Dockerfiles for NVIDIA GPU containers running ML image-processing software, making deployments 10x faster.
Senior Python Developer
EffectiveSoft
- Created an application server for TensorFlow apps that is similar to TensorFlow Serving.
- Developed an extract, transform, load (ETL) service to migrate data from InfluxDB (storage) to PostgreSQL (used for analytics).
- Unified the codebase of various packages to use the same API at the application level.
- Created Jenkins jobs and pipelines for building Docker images.
Python and Django Software Developer
iTechArt
- Developed an application that provided API for tablets located in restaurants, used for orders and payments. API included payment processing and statistics collection.
- Tracked and fixed bugs in Jira as a reporting tool.
- Built and enhanced Docker-related part of the deployment, resulting in smaller Docker image size and faster deployments.
Python Software Developer
IBA Gomel Park
- Developed an application that collected traffic incidents statistics from various sources and transformed data stored and later used for traffic incidents prediction AI.
- Created an application providing an API for the traffic incidents prediction AI to enable another front-end application to use later.
- Developed a unique ORM tool to store data in two different data sources. The tool allowed specific fields to be duplicated between data sources, while others were unique for particular sources.
System Administrator
Real Estate Agency Line of the Law
- Developed an application and widget chat for the sales team to unify communication with customers, including providing a single interface to use multiple sources such as email and Telegram.
- Fixed bugs on the front-end part of the agency's landing page.
- Maintained the working environment and managed software and internet for employees, and set up an environment for new hires.
Experience
Aircraft Maintenance Manual Parser
• Processed mostly unstructured XML data, containing human-readable text within its tags
• Designed the parser to seamlessly process and integrate structural discrepancies found in different revisions of the same manual
Pure Python RTF Parser
• Implemented substantial support of Rich Text Format (RTF) Specification, version 1.9.1, extracting all text, styles, table and image-related data
Grammar-based (PEG) Document Parser
• The parser is used to transform the data extracted from various document formats, including docx and rtf into the format required for storing in the database, presentation in the UI and training of ML models
• The parser provides an interface similar to pyparsing library
Git Command for Multiple Repositories in the Same Folder
https://github.com/tilalis/git-allTensorFlow Applications Server
The plugin can use TensorFlow models; if it uses one, it must load the model in a unique method defined by server API.
Education
Master's Degree in Computer Science
Francisk Skorina Gomel State University - Gomel, Belarus
Bachelor's Degree in Computer Science
Francisk Skorina Gomel State University - Gomel, Belarus
Certifications
Al Fluency Framework & Foundations
Anthropic
Certified in Cybersecurity (CC)
ISC2
Skills
Libraries/APIs
Django ORM, REST APIs, SQLAlchemy, Jenkins Pipeline, Vue, Pydantic, Sockets, Beautiful Soup, React
Tools
PyCharm, Git, Jenkins, Pytest, Cron, MATLAB, Amazon Simple Queue Service (SQS), RabbitMQ, Grafana, Celery, Claude Code, Terraform
Languages
Python 3, JavaScript, HTML, Python, CSS, HTML5, XML, SQL, Bash, GraphQL, C, Assembly, PHP
Frameworks
Flask, Django, Django REST Framework, Selenium, Pyramid, gRPC
Paradigms
Hosting, ETL, DevOps, Microservices, Unit Testing, Testing, Database Design, Automation
Platforms
Docker, Linux, Ubuntu Linux, Software Design Patterns, Amazon Web Services (AWS), AWS Lambda, Azure, Firebase
Storage
Redis, Databases, MongoDB, PostgreSQL, ANSI SQL, Cloud Deployment, SQLite, Amazon S3 (AWS S3)
Industry Expertise
Cybersecurity
Other
FastAPI, Software Development, Processing & Threading, Pony, Code Review, Source Code Review, Web Scraping, APIs, Python Dataclasses, Scraping, API Integration, Web Servers, Back-end, Multiprocessing, Interviewing, Interviews, FTP, SFTP, Technical Documentation, Communication, Public Speaking, Data Scraping, Regular Expressions, System Architecture, Serverless, Data Engineering, Cryptography, Networking, API Connectors, Telnet Protocol, Analytical Dashboards, GPU Computing, Graphics Processing Unit (GPU), Amazon Bedrock, Large Language Models (LLMs), CI/CD Pipelines, Data Processing Automation, SGML, Document Parsing, RTF, Functional Specifications, PEG Parsing, Artificial Intelligence (AI), Network Security, Access Control
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