S

Serhii Patei

About

Detail

Senior Full Stack Engineer
Tallinn, Estonia

Timeline

work
Job
school
Education
folder
Project

Résumé

Jobs verified_user 0% verified
  • Nortal
    Senior Full Stack Engineer
    Nortal
    Mar 2022 - Current (4 years 7 months)
    • Architected and delivered full-stack web applications using React, Redux, TypeScript, Node.js, GraphQL, and PostgreSQL, supporting 100K+ monthly active users.
    • Led modernization of legacy systems, reducing average page load times by 45% and improving user engagement metrics.
    • Designed and implemented RESTful APIs and backend services using Node.js, Django, Python, and Java, supporting millions of monthly API requests with high availability.
    • Developed cloud-native solutions on AWS and GCP using Docker, Kubernetes, and Terraform, reducing deployment times by 70% through CI/CD automation and infrastructure-as-code practices.
    • Integrated machine learning services into production workflows, reducing manual processing e
  • Blanc Labs
    Senior Backend Engineer
    Blanc Labs
    Apr 2018 - Feb 2022 (3 years 11 months)
    • Designed and developed scalable backend services using Python, Go, Node.js, and Rust supporting tens of thousands of daily transactions.
    • Built microservices and distributed APIs using Python, Go, Rust, and Java, improving system scalability and reducing service response times by 35%.
    • Developed large-scale data processing pipelines using Spark, NumPy, and SciPy, reducing data processing time by 40%.
    • Optimized database architecture across PostgreSQL, MySQL, MongoDB, Redis, and DynamoDB, improving query performance by 50% for critical workloads.
    • Integrated machine learning models into production systems, increasing prediction accuracy by 20% compared to previous rule-based approaches.
    • Led backend modernizat
  • Blanc Labs
    Backend Engineer
    Blanc Labs
    Sep 2016 - Mar 2018 (1 year 7 months)
    • Developed backend services and REST APIs supporting applications used by 50K+ end users.
    • Implemented Python and Node.js services that reduced manual business workflows by 30% through automation.
    • Designed scalable database solutions using MySQL and MongoDB, improving application performance and reliability.
    • Implemented Redis caching strategies that reduced average API response times by 40%.
    • Collaborated closely with frontend teams delivering Angular and React-based applications across multiple product releases.
    • Developed automated unit and integration tests, helping reduce post-release defects by 25%.
  • Ciklum
    Software Engineer
    Ciklum
    Jul 2012 - Aug 2016 (4 years 2 months)
    • Developed web applications and business solutions for international clients across finance, healthcare, and enterprise domains.
    • Built frontend applications using Angular, Backbone.js, JavaScript, HTML, and CSS, contributing to successful delivery of 10+ client projects.
    • Developed backend services and integrations using Python and Node.js, supporting business-critical workflows.
    • Optimized SQL queries and database structures, reducing report generation times by 60%.
    • Participated in Agile/Scrum teams delivering software releases on bi-weekly and monthly release cycles.
    • Contributed to automated testing initiatives using JUnit, NUnit, and Mocha, improving software quality and release stability.
Education verified_user 0% verified
  • N
    B.Sc. in Computer Science
    National Technical University of Ukraine "KPI"
    Jun 2012
Projects (professional or personal) verified_user 0% verified
  • I
    AI-Powered Customer Intelligence Platform
    IndependentPersonal
    Jan 2025 - Current (1 year 9 months)
    AI platform for customer segmentation, recommendations, and analytics.
    • Developed AI agents and RAG-based knowledge retrieval workflows using LangChain, improving response relevance and reducing manual research effort by 65%.
    • Built scalable REST APIs and backend services using Python and Node.js to serve real-time prediction requests.
    • Implemented recommendation and classification models using Scikit-learn, TensorFlow, and Keras.
    • Reduced customer segmentation processing time by 60% through optimization of Spark-based data pipelines.
  • I
    Enterprise Workflow Automation Platform
    IndependentPersonal
    Mar 2023 - Dec 2024 (1 year 10 months)
    Cloud-native workflow management platform used by enterprise clients to automate business operations.
    • Developed role-based access control and workflow orchestration modules supporting 100K+ monthly transactions.
    • Reduced manual operational effort by 50% through intelligent workflow automation.
    • Implemented CI/CD pipelines and automated testing processes, reducing release cycles from weeks to days.