Freelancer profile translated to English.
Back to original languageAbout Dmitry
☁️ Google Developer Expert (GDE) Cloud & Workspace: Strategic Automation 🚀
I am Dmitry Kostyuk, author of the book 📘 "Kickstart Google Apps Script" and a Google Developer Expert (GDE). I embody the role of a "Player-Coach" ⚽👨💻, capable of delivering Apps Script code (JavaScript/TypeScript) while designing the strategic technical architecture on the Cloud.
🎯 My goal is simple: propel your business to unparalleled efficiency and accuracy by transforming your Google Workspace operations.
⚡ My Technical Commitment (Apps Script & Google Cloud):
- 🛠️ Bimodal Expertise: I develop Apps Script solutions (SpreadsheetApp, GmailApp, DriveApp, Add-ons) to automate repetitive tasks and connect these solutions to robust Cloud infrastructures.
- ☁️ Advanced GCP Mastery: I am an expert in Google Cloud (Cloud Functions, Firestore, CloudSQL) and specialize in data optimization via BigQuery, particularly automating BigQuery Imports to Google Sheets. I also use Terraform for Infrastructure as Code (IaC).
- 📉 Quantified Impact: I implement tailor-made solutions that enable my clients to save over 10 hours per week ⏳, eradicating human errors and cutting costs of generic SaaS products 💸.
- 🤝 Proven Experience: I have developed strategic platforms and AI/Cloud solutions for renowned companies such as Airbus, Veolia RVD, and Air Liquide.
💡 Ready to move from chaos to Cloud-Native efficiency? Let's discuss how automation and AI integration can revolutionize your Google Workspace.
🔗 My Links & Resources:
- 📖 My Book: * 🌐 My Blog: * 🎖️ My GDE Profile: * 🐙 My GitHub:
English
Native or bilingual
Russian
Native or bilingual
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- MentormaticCTOFebruary 2025 - Today (1 year and 4 months)
*Leads the technical roadmap and hands-on development of an AI-powered SaaS platform for professional coaching. Acts as the Principal Architect for the entire technology stack.*
- Architecture & Product Vision:
Designed the end-to-end microservices architecture on**GCP**, translating academic management frameworks into a scalable SaaS product. Reduced the initial time-to-market for the Minimum Viable Product (MVP) by leveragingViteandAlpine.jsfor a high-performance, low-latency frontend.- LLM & Generative AI Engineering:
Engineered the "AI-Powered Assistant" usingLLM fine-tuningand prompt engineering to generate dynamic, personalized reflection logs for mentees. Implemented distinct contextual logic that tailors output based on session history.- Algorithm Design:
Developed proprietary psychosocial matching algorithms using weighted logic in**Node.js**,going beyond simple keyword matching to pair mentors/mentees based on behavioral compatibility.- Infrastructure & Scalability:
Deployed a serverless infrastructure usingDockerand**Terraform**,ensuring the platform scales elastically from pilot users to enterprise volume while maintaining zero-downtime deployments.- Real-time Systems:
Built a secure, real-time internal communication layer including calendar sync and chat, adhering to strict data privacy standards suitable for enterprise clients. - Wurkspaces.devFounder & Principal Technical ArchitectMay 2020 - Today (6 years and 1 month)Paris, FranceConsulting firm specializing in delivering high-impact automation and custom web applications for Fortune 500 clients within the Google Workspace ecosystem.Veolia RVD (Enterprise Data Operations): Designed internal add-ons to automate bulk data migration between BigQuery and Google Sheets. Wrote custom scripts to bypass API rate limits, eliminating over 100 hours of manual data entry per month.Airbus (Secure Web Architecture): Architected a secure salary review application. Implemented Row-Level Security (RLS) and granular ACLs to ensure managers could only access specific datasets within a shared hierarchical database.Air Liquide (Workflow Automation): Developed automation for the CAPA (Corrective and Preventive Actions) system. Created shared NPM libraries to standardize testing frameworks and report generation, reducing compliance reporting time by 40%.Legacy System Integration: Built custom parsers in Node.js to ingest unsupported legacy formats (Excel binary, EML) into modern, cloud-native environments.
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Education
- Professional DevelopmentUniversity of Illinois2001
- Computer scienceCIEFA Paris - Centre de Formation en Alternance2004
Certifications
- Google Apps Script Complete CourseUdemy2020
- Object-oriented Programming in JavaScriptUdemy2021