Anton Holud - Senior Full Stack Engineer

Q: Where is Anton based?

Anton is based in Warszawa, Poland .

Q: What languages does Anton speak?

Anton speaks the following languages: English (Advanced), Polish (Advanced), German (Elementary), Estonian (Elementary) .

Q: How many years of experience does Anton have?

Anton has at least 10 years of experience. During this time, Anton has worked in at least 4 different roles and for 4 different companies . The average length of individual experience is 2 years and 5 months . Note that Anton may not have shared all experience and actually has more experience.

Q: What roles would Anton be best suited for?

Based on recent experience, Anton would be well-suited for roles such as: Senior Full Stack Engineer, Full Stack Engineer, Backend Developer .

Q: What is Anton's latest experience?

Anton's most recent position is Senior Full Stack Engineer at eConsulting .

Q: What companies has Anton worked for in recent years?

In recent years, Anton has worked for eConsulting , DevLab Ltd , and Intelligenz IT .

Q: Which industries is Anton most experienced in?

Anton is most experienced in industries like Information Technology (IT) and Banking and Finance .

Q: Which business areas is Anton most experienced in?

Anton is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence .

Q: Which industries has Anton worked in recently?

Anton has recently worked in industries like Information Technology (IT) and Banking and Finance .

Q: Which business areas has Anton worked in recently?

Anton has recently worked in business areas like Information Technology (IT) , Product Development , and Business Intelligence .

Recommended expert

Warszawa, Poland

Experience

Aug 2023 - Oct 2025

2 years 3 months

Warsaw, Poland

Senior Full Stack Engineer

eConsulting

Engineered Python backend development for enterprise data analytics platform processing 50M+ records daily using Django, FastAPI, and Celery.
Architected and implemented scalable RESTful APIs using Django REST Framework and FastAPI, reducing average response time from 380ms to 95ms through query optimization and caching.
Designed microservices architecture using FastAPI and Docker, enabling independent scaling and improving system reliability to 99.95% uptime.
Built high-performance data processing pipelines using Celery, Redis, and PostgreSQL, processing 10M+ tasks daily with 99.9% success rate.
Optimized complex database queries using Django ORM and raw SQL, implementing proper indexing and reducing query execution time by 70%.
Developed real-time data streaming service using WebSockets and Redis pub/sub, handling 200K+ concurrent connections.
Implemented comprehensive authentication/authorization system using Django Authentication, JWT, and OAuth 2.0, supporting SSO for enterprise clients.
Integrated machine learning models into production using Flask and FastAPI, serving predictions for 5M+ requests daily with <50ms latency.

Apr 2022 - Jun 2023

1 year 3 months

Tallinn, Estonia

Full Stack Engineer

DevLab Ltd

Developed and maintained high-traffic RESTful APIs using Django and Django REST Framework, serving 8M+ daily requests for SaaS platform.
Designed and optimized PostgreSQL database schemas with complex relationships, implementing efficient indexing and query optimization strategies.
Built real-time notification system using Django Channels and WebSockets, processing 500K+ events per hour with sub-100ms latency.
Created GraphQL API layer using Graphene-Django, reducing over-fetching and improving front-end performance by 35%.
Implemented microservices architecture for user management, payment processing, and analytics services using Flask and FastAPI.
Integrated multiple third-party APIs (Stripe, SendGrid, AWS S3, Twilio) for payment processing, email delivery, and file storage.

Feb 2020 - Mar 2022

2 years 2 months

Munich, Germany

Backend Developer

Intelligenz IT

Built scalable backend infrastructure from scratch using Django and PostgreSQL for fintech startup, handling 2M+ API requests daily.
Designed and implemented PostgreSQL database architecture with proper normalization, constraints, and relationships for financial transactions.
Developed secure authentication system using Django Authentication and JWT, implementing password hashing, session management, and token refresh.
Created RESTful API endpoints using Django REST Framework for mobile and web applications, following REST principles and best practices.
Integrated payment processing using Stripe API and Django, implementing webhooks for payment verification and subscription management.

Aug 2015 - Oct 2019

4 years 3 months

Białystok, Poland

Junior Python Developer

Softwarehut Ltd

Developed backend APIs and server-side logic using Python, Django, and Flask for client web applications.
Created and maintained PostgreSQL and MySQL databases, writing efficient queries and ensuring data integrity.
Implemented user authentication and authorization systems using Django Authentication and custom middleware.
Built RESTful APIs for e-commerce platforms, integrating payment gateways and third-party services.
Developed server-side rendering solutions using Django templates and Jinja2.
Wrote unit and integration tests using pytest and Django Test Framework, achieving 75% code coverage.
Participated in code reviews and learned best practices for clean, maintainable Python code.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (9.5 years) and Banking and Finance (2 years).

Information Technology

Banking and Finance

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (9.5 years), Product Development (5.5 years), and Business Intelligence (2 years).

Information Technology

Product Development

Business Intelligence

Summary

Senior Full Stack Engineer with 10 years of expertise in Python backend development, specializing in Django, Flask, and FastAPI frameworks. Proven track record of building scalable RESTful APIs, microservices architectures, and data-intensive applications processing millions of records daily. Expert in database design, API optimization, and cloud infrastructure. Strong background in machine learning integration, data processing pipelines, and building robust backend systems for enterprise applications.

Skills

Languages: Html5, Css3, Javascript (Es6+), Typescript, Python
Back-end Core: Python 3.x, Django, Flask, Fastapi, Celery, Asyncio
Databases & Orms: Postgresql, Mysql, Sqlite, Mongodb, Redis, Dynamodb, Sqlalchemy, Django Orm
Api & Integration: Restful Apis, Graphene, Strawberry, Fastapi, Django Rest Framework, Websocket, Stripe
Data Processing & Ml: Pandas, Numpy, Scikit-learn, Etl Pipelines, Apache Airflow, Data Warehousing, Ml Integration
Front-end: React, Vue.js, Next.js, Django Templates, Jinja2
Cloud & Infrastructure: Microsoft Azure, Azure Devops, Docker, Kubernetes, Nginx, Iis
Devops & Ci/cd: Github Actions, Gitlab Ci, Jenkins, Azure Pipelines
Methodologies: Agile/scrum, Tdd, Bdd, Solid, Design Patterns, System Architecture

Languages

English

Advanced

Polish

Advanced

German

Elementary

Estonian

Elementary

Education

Apr 2011 - Mar 2015

NUS - National University of Singapore

Bachelor's degree, Computer Science · Computer Science · Singapore

Profile

Created

November 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Anton based?

Anton is based in Warszawa, Poland.

What languages does Anton speak?

Anton speaks the following languages: English (Advanced), Polish (Advanced), German (Elementary), Estonian (Elementary).

How many years of experience does Anton have?

Anton has at least 10 years of experience. During this time, Anton has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 2 years and 5 months. Note that Anton may not have shared all experience and actually has more experience.

What roles would Anton be best suited for?

Based on recent experience, Anton would be well-suited for roles such as: Senior Full Stack Engineer, Full Stack Engineer, Backend Developer.

What is Anton's latest experience?

Anton's most recent position is Senior Full Stack Engineer at eConsulting.

What companies has Anton worked for in recent years?

In recent years, Anton has worked for eConsulting, DevLab Ltd, and Intelligenz IT.

Which industries is Anton most experienced in?

Anton is most experienced in industries like Information Technology (IT) and Banking and Finance.

Which business areas is Anton most experienced in?

Anton is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence.

Which industries has Anton worked in recently?

Anton has recently worked in industries like Information Technology (IT) and Banking and Finance.

Which business areas has Anton worked in recently?

Anton has recently worked in business areas like Information Technology (IT), Product Development, and Business Intelligence.

What is Anton's education?

Anton holds a Bachelor in Computer Science from NUS - National University of Singapore.

What is the availability of Anton?

Anton is immediately available full-time for suitable projects.

What is the rate of Anton?

Anton's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.