Mark is available for hire
Hire MarkMark Vinogradov
Verified Expert in Engineering
Python Developer
Tbilisi, Georgia
Toptal member since September 10, 2026
Bio
Mark is an experienced software engineer with a broad background in ML and LLMs. He's designed and implemented several scalable SaaS products, including LLM-powered retrieval systems and AI assistants. His preferred language is Python, although he's familiar with Kotlin, Java, and Go. His strongest quality as an engineer is his ability to execute software projects end-to-end.
Portfolio
Sema
Python, Jira, GitHub, Linear, Slack, Zoom, Agentic RAG Systems, English...
Datafold
Databricks, SAP HANA, Agentic RAG Systems, English, GCP, Python, AI Integration...
Synthesized
Python, Apache Airflow, Spark, GCP, LangChain, gRPC, English, Celery, Core ML...
Experience
- Python - 10 years
- Django - 10 years
- Machine Learning - 5 years
- Celery - 5 years
- Apache Airflow - 3 years
- LangChain - 3 years
- GCP - 3 years
- Agentic RAG Systems - 2 years
Work Experience
Senior Python Engineer
2025 - 2026
Sema
- Built the Liz Chat system end-to-end, including architecture, deployment, and monitoring. Designed a unified retrieval layer with agent tools for fast search across differently structured data sources.
- Implemented AI-powered report generation, including sprint summaries, developer productivity metrics, and project health dashboards.
- Technical Lead on multiple integration projects: Slack, Zoom, and MS Teams integrations end-to-end, and published a Zoom Marketplace App.
- Conducted MLOps activities such as AI harness testing, semi-supervised user flow evaluations, and dataset curation.
Technologies: Python, Jira, GitHub, Linear, Slack, Zoom, Agentic RAG Systems, English, Apache Airflow, LangChain, AI Integration, Core ML, LLM Integration, Artificial Intelligence (AI), Large Language Models (LLMs), Mobile App Development, APIs, Integrations, JavaScript, REST APIs, Agentic AI, Claude Code, PostgreSQL, Web Development, Security, Code Review, Full-stack, Supabase, User Interface (UI), User Experience (UX), Cloud Deployment, AI Agents, Back-end, Distributed Systems, Software Architecture, Technical Leadership, TypeScript, AI-generated Code, API Integration, Tailwind CSS, AI-assisted Development, Full-stack Development, OpenAI SDK, Amazon Web Services (AWS), DevOps, Pydantic, Pipelines, Reporting, Reports, Role-based Access Control (RBAC), User Roles, Workflows, OpenAI, Architecture, Claude, Database Architecture, Cloud Infrastructure, Leadership, XML, Data Pipelines, System Integration, Retrieval-augmented Generation (RAG)
Senior Python Engineer
2025 - 2025
Datafold
- Contributed to the Data Migration Studio project, an automated database migration tool, translating legacy SQL scripts into new SQL dialect scripts or dbt models.
- Developed a 90%-automated LLM-assisted database migration from SAP HANA and Informatica to Databricks.
- Translated approximately 250 column views, 50 stored procedures, hierarchy views, and four NDSO pipelines.
Technologies: Databricks, SAP HANA, Agentic RAG Systems, English, GCP, Python, AI Integration, Core ML, LLM Integration, Artificial Intelligence (AI), Large Language Models (LLMs), APIs, Integrations, MySQL, REST APIs, Agentic AI, Claude Code, PostgreSQL, Security, Code Review, Full-stack, Cloud Deployment, AI Agents, Back-end, Distributed Systems, Software Architecture, TypeScript, AI-generated Code, API Integration, AI-assisted Development, Full-stack Development, Amazon Web Services (AWS), DevOps, Pydantic, Pipelines, Reporting, Reports, Role-based Access Control (RBAC), User Roles, Workflows, OpenAI, Architecture, Claude, Database Architecture, Elasticsearch, Cloud Infrastructure, XML, Data Pipelines, System Integration
Senior Back-end Engineer
2023 - 2025
Synthesized
- Built an ML model quality monitoring pipeline that reduced manual QA effort using Airflow, Spark, and GCP.
- Built a natural-language-to-SQL generation service for automated test data creation using Langchain and gRPC.
- Rejoined to contribute to the Python R&D back end, several pilot/demo projects, and MLOps and infrastructure.
Technologies: Python, Apache Airflow, Spark, GCP, LangChain, gRPC, English, Celery, Core ML, Mobile App Development, Mobile Development, APIs, Integrations, JavaScript, REST APIs, PostgreSQL, Web Development, CRM, Security, Code Review, Full-stack, Mobile, User Experience (UX), Cloud Deployment, Back-end, Multi-tenant SaaS, API Integration, Full-stack Development, Vercel, Fastify, Amazon Web Services (AWS), DevOps, Terraform, Pydantic, Pipelines, Reporting, Reports, Role-based Access Control (RBAC), User Roles, Workflows, OpenAI, Next.js, Database Architecture, Cloud Infrastructure, XML, Java, Fintech, Data Pipelines, System Integration
Back-end Engineer
2022 - 2023
OneSoil
- Collaborated with an agronomist to develop and implement a harvester's yield data analysis framework used by approximately 100,000 users on over one million fields worldwide in 2022.
- Developed and implemented a soil sampling method based on segmentation of the productivity map, which became the main selling point for LATAM-based farming companies.
- Refactored parts of an existing Django application to reduce AWS costs by approximately 43% and improve performance by approximately 20% in data-heavy pipelines while maintaining 99.9% uptime.
Technologies: Django, AWS IoT, English, GCP, Python, Apache Airflow, Celery, Core ML, Mobile App Development, Mobile Apps, Mobile Development, APIs, Integrations, MySQL, Node.js, REST APIs, React, PostgreSQL, Web Development, Security, Code Review, Full-stack, Mobile, User Interface (UI), User Experience (UX), Cloud Deployment, Back-end, API Integration, Full-stack Development, Amazon Web Services (AWS), Pydantic, Pipelines, Reporting, Reports, Role-based Access Control (RBAC), User Roles, Workflows, Next.js, Database Architecture, Cloud Infrastructure, XML, Data Pipelines, System Integration
Back-end Engineer
2020 - 2022
Synthesized
- Built a SaaS platform end-to-end including design, testing, deployment, and monitoring.
- Led multiple successful pilots for clients such as Deutsche Bank, UBS, and UK W&P.
- Developed a Python and JVM-powered back end for a SaaS cloud platform (GCP-hosted), providing ML model inference through a public API.
Technologies: Python, English, GCP, Apache Airflow, Celery, Core ML, Mobile App Development, Mobile Apps, Mobile Development, APIs, Integrations, JavaScript, REST APIs, PostgreSQL, Web Development, Security, Code Review, Full-stack, Mobile, Cloud Deployment, Back-end, Multi-tenant SaaS, API Integration, Full-stack Development, Vercel, Fastify, Terraform, Pydantic, Pipelines, Reporting, Reports, Role-based Access Control (RBAC), User Roles, Workflows, Next.js, Database Architecture, Cloud Infrastructure, XML, Java, Fintech, Data Pipelines, System Integration
Back-end Engineer
2019 - 2020
Cobrain.io
- Led a team of three building a medical data collection back end.
- Managed hospital integrations from demo to contract.
- Managed hospital integrations from demo to contract.
Technologies: Django, English, Python, Celery, Core ML, Mobile App Development, Mobile Apps, Mobile Development, APIs, REST APIs, Web Development, Code Review, Full-stack, Mobile, Back-end, API Integration, Full-stack Development, Reporting, Reports, Role-based Access Control (RBAC), User Roles, Workflows, Cloud Infrastructure, XML
Full-stack Engineer
2016 - 2018
Inspector Cloud
- Worked on object detection for retail applications.
- Led an automatic shelf monitoring project with X5.
- Built a semi-supervised annotation for an image recognition pipeline.
Technologies: Django, Computer Vision, English, Python, Celery, Core ML, Mobile App Development, Mobile Apps, Mobile Development, APIs, REST APIs, Web Development, Code Review, Full-stack, Mobile, Back-end, API Integration, Full-stack Development, Role-based Access Control (RBAC), User Roles, Cloud Infrastructure, XML
Project History
Conflux Card Game
https://conflux.marqueewinq.xyz/A two-player digital card game with deck drafting, real-time WebSocket gameplay, and an automated bug-fix pipeline where player feedback triggers a Claude Code agent to write failing tests, fix bugs, and open PRs. I built it with a Python/Starlette back end and a vanilla JavaScript front end. It was deployed via Docker Compose with a Git push-to-deploy workflow.
Shooter: Full-page Site Screenshot Service
https://github.com/marqueewinq/shooterA REST API and CLI-enabled tool that captures full-page or partial screenshots from URLs, detects and labels HTML elements, and performs scripted user actions during the process. I designed a scalable architecture with task brokering, enabling concurrent execution by multiple workers and delivering comprehensive outputs, including labeled images and JSON metadata.
Education
2017 - 2019
Master's Degree in Computer Science
Skoltech Institute of Science and Technology - Moscow, Russia
2012 - 2016
Bachelor's Degree in Computer Science
Moscow Institute of Physics and Technology - Moscow, Russia
Certifications
JUNE 2020 - PRESENT
IELTS
IELTS
Skills
Libraries/APIs
Pydantic, REST APIs, React, Node.js, TensorFlow, PyTorch, Scikit-learn, OpenCV, OpenAI API
Tools
Celery, Claude Code, Claude, Apache Airflow, Terraform, Jira, GitHub, Slack, Zoom, Grafana
Languages
Python, TypeScript, XML, Java, JavaScript, Kotlin
Frameworks
Django, Core ML, Fastify, Next.js, Spark, gRPC, Flask, Selenium, Tailwind CSS
Paradigms
DevOps, Role-based Access Control (RBAC), Mobile Development
Platforms
Docker, Amazon Web Services (AWS), Mobile, Vercel, AWS IoT, Azure, Kubernetes, Databricks, SAP HANA
Storage
PostgreSQL, Elasticsearch, MySQL, Cloud Deployment, Database Architecture, Data Pipelines, MongoDB
Other
Retrieval-augmented Generation (RAG), FastAPI, Machine Learning, Agentic RAG Systems, AI Integration, Artificial Intelligence (AI), Large Language Models (LLMs), Agentic AI, Web Development, CRM, Security, Code Review, Full-stack, Supabase, User Interface (UI), AI Agents, Back-end, Software Architecture, API Integration, Full-stack Development, Pipelines, Reporting, Reports, User Roles, Workflows, OpenAI, Architecture, Cloud Infrastructure, System Integration, GCP, LangChain, LLM Integration, Mobile App Development, APIs, Integrations, User Experience (UX), Distributed Systems, Technical Leadership, Multi-tenant SaaS, AI-generated Code, Applied Mathematics, Mathematics, Statistics, Linear, Prometheus, Kafka, Computer Vision, Data Science, Mathematical Statistics, Combinatorics, CommonJS, English, Mobile Apps, AI-assisted Development, OpenAI SDK, Leadership, Fintech
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