Gregor Doroschenko - Founder, Principal Software Architect & Technical Consultant

Q: Where is Gregor based?

Gregor is based in Berlin, Germany and prefers 100% remote projects.

Q: What languages does Gregor speak?

Gregor speaks the following languages: German (Native), Russian (Native), English (Advanced) .

Q: How many years of experience does Gregor have?

Gregor has at least 9 years of experience. During this time, Gregor has worked in at least 6 different roles and for 6 different companies . The average length of individual experience is 2 years and 7 months . Note that Gregor may not have shared all experience and actually has more experience.

Q: What is Gregor's latest experience?

Gregor's most recent position is Founder, Principal Software Architect & Technical Consultant at Hold My Code GmbH .

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

In recent years, Gregor has worked for Hold My Code GmbH , SoftwareOne , KPS AG , and VIGNOLD Group .

Q: Which industries is Gregor most experienced in?

Gregor is most experienced in industries like Information Technology , Professional Services , and Manufacturing . Gregor also has some experience in Energy and Retail .

Q: Which business areas is Gregor most experienced in?

Gregor is most experienced in business areas like Information Technology , Product Development , and Research and Development .

Q: Which industries has Gregor worked in recently?

Gregor has recently worked in industries like Information Technology , Professional Services , and Retail .

Q: Which business areas has Gregor worked in recently?

Gregor has recently worked in business areas like Information Technology , Product Development , and Research and Development .

Recommended expert

Berlin, Germany

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Experience

Jun 2022 - Present

4 years

Founder, Principal Software Architect & Technical Consultant

Hold My Code GmbH

Frontend modernization (multiple client engagements): Angular version upgrades, architecture refactoring, performance optimization, state management restructuring, and UI library consolidation resulting in faster load times and improved end-user experience across all projects.
Web development: High-performance landing pages and company websites for SMB clients built with Next.js, SvelteKit, PayloadCMS, and TailwindCSS optimized for speed, SEO, and conversion.
SaaS product development: Architecting and building an AI-powered platform for photography studio operators (PoC phase) with full-stack TypeScript: Angular frontend, NestJS backend, PostgreSQL, LLM integration (Gemini/Claude) for intelligent workflow automation.
AI integration: Developed a PoC for AI-generated podcast avatars using the Gemini API for content production workflows.
Angular deep dive workshops: Delivered 20+ workshops (3–5 days each, 8–10 participants) in a hands-on format where participants build a demo application modeled after their real business domain.

May 2022 - Dec 2025

3 years 8 months

Senior Angular Consultant & Architect

SoftwareOne

Architecture lead: Owned the frontend architecture for a complex sales tool with shopping cart module, product search & filtering, and quote/order management integrated into the Dynamics 365 ecosystem.
Migration: Executed a full Angular upgrade path (v8 to v20) on a live production system with 5,000+ daily users with zero downtime throughout the entire migration.
Performance: Cut application load times by 65% through architecture refactoring, code splitting, and lazy loading strategies.
UX/UI redesign: Reworked the user interface to reduce complexity and improve usability for sales staff.
Mentoring: Coached four developers within the 9-person team to independently continue Angular upgrades and feature development after engagement ended.

Oct 2020 - Mar 2022

1 year 6 months

Senior Angular Software Engineer

KPS AG

Built core e-commerce modules—marketplace, click & collect, checkout, and user dashboard—as part of a full SPA relaunch.
Identified and resolved a critical checkout bug within five hours during the Black Friday Week launch for Norway and Denmark, preventing a launch delay during the highest-traffic sales period.
Contributed to Core Web Vitals optimization (LCP, CLS) to ensure fast page loads at scale.
Implemented Apollo GraphQL interfaces for high-performance data retrieval across product catalogs and order flows.
Ensured reliability through comprehensive unit testing with Jasmine and Karma.

Feb 2020 - Apr 2020

3 months

Angular Software Engineer (Task Force)

ZEUS Automatisierungstechnik GmbH

Fast-tracked the frontend development of an HMI web application for industrial automation as part of a mid-project task force.
Bootstrapped the Angular 9 application architecture and built reusable UI components using Angular CDK for complex machine control interactions.

Jan 2020 - Jan 2023

3 years 1 month

Lead Angular Software Engineer

VIGNOLD Group

Brought in as the dedicated Angular specialist to resolve performance bottlenecks and accelerate feature delivery in a 5-person full-stack Java/Angular team.
Restructured component communication and module architecture to eliminate performance issues caused by inefficient data flow between components.
Built complex UI interactions using Angular Material and Angular CDK, including a drag-and-drop page editor, product catalog search, and a visual review system with on-page annotations and comments.
Established code review practices and refactored legacy sections of the codebase to improve maintainability.

Jan 2017 - Dec 2019

3 years

Software Developer & Lead of Angular Unit

Develappers GmbH

Built and led a 3-person Angular unit, responsible for technology decisions, coding standards, and team development, and recruited two developers.
Developed the Angular frontend for an industrial engineering platform used for production planning, time management, and ergonomic risk assessment in manufacturing, featuring complex multi-step workflows, data visualization, and multi-language support.
Built a research database portal for a green energy company to centralize experimental data, including batch tracking, test protocols, analysis workflows, and ERP system integration for end-to-end order traceability.
Conducted internal training sessions and professional development for developers across the company.
Managed internal server infrastructure on Linux.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Professional Services, Manufacturing, Energy, and Retail.

Information Technology

Professional Services

Manufacturing

Energy

Retail

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, and Research and Development.

Information Technology

Product Development

Research and Development

Summary

Gregor Doroschenko is a senior lead software engineer, architect, and interim engineering manager with 15+ years of experience in professional software development. He specializes in the architecture of scalable enterprise web applications (Angular expert level), full-stack delivery with TypeScript end-to-end (Angular + NestJS), and the technical and managerial leadership of development teams.

His track record includes zero-downtime Angular migrations in business-critical production systems (5,000+ users), application performance improvements of 65%+, and 20+ hands-on Angular workshops for client teams. He combines deep technical expertise with management experience: building remote teams, establishing engineering best practices, and acting as the interface between business stakeholders and technology. Industry experience spans e-commerce, SaaS, industrial engineering, MedTech, and CleanTech. Currently expanding into AI-augmented development to accelerate delivery cycles and reduce technical debt.

Skills

Leadership & Management

Technical Team Leadership – Expert, 7+ Years, Teams Up To 9 People
Interim Engineering Management – Expert, 7+ Years, Remote & On-Site
Mentoring & Coaching – Expert, 7+ Years, Senior & Junior Developers
Stakeholder Management – Advanced, 5+ Years, Business & Technology
Workshop Facilitation – Expert, 20+ Workshops, 3-5 Day Deep Dives

Frontend Engineering

Angular (Architecture, Nx, Rxjs, Signals, Cdk) – Expert, 10+ Years, Since V2 Beta
Typescript – Expert, 10+ Years, Enterprise-Scale Applications
Rxjs – Expert, 8+ Years, Complex Async Workflows
React / Next.Js – Advanced, 3+ Years, Greenfield Projects, Ssr
Svelte / Sveltekit – Advanced, 3+ Years, Performance-Critical Sites
Tailwindcss – Advanced, 3+ Years, Design Systems, Rapid Ui
Micro-Frontends – Advanced, 3+ Years, Module Federation

Backend & Architecture

Node.Js – Expert, 8+ Years, Production Backend Services
Nestjs – Advanced, 4+ Years, Api Design, Microservices
Rest Api Design – Expert, 10+ Years, Enterprise Integrations
Graphql (Apollo) – Advanced, 4+ Years, E-Commerce, Data-Heavy Apps
Go (Golang) – Intermediate, 3 Years, Backend Services
Postgresql / Mysql – Advanced, 9+ Years, Schema Design, Optimization
Mongodb / Sqlite – Advanced, 5-6 Years, Document Stores, Mobile
Headless Cms (Payloadcms, Strapi, Pocketbase) – Advanced, 4+ Years, Content Platforms
Ddd / Microservices – Advanced, 5+ Years, Architecture Patterns

Cloud & Devops

Docker – Advanced, 8+ Years, Containerization, Compose
Aws – Advanced, 4+ Years, Production Deployments
Azure Devops – Advanced, 3+ Years, Ci/Cd Pipelines
Gitlab Ci / Teamcity – Advanced, 5+ Years, Build Automation
Kubernetes – Intermediate, 2 Years, Orchestration Basics
Linux Server Administration – Advanced, 8+ Years, Infrastructure Management

Ai & Innovation

Llm Integration (Openai, Gemini, Anthropic Apis) – Advanced, 2+ Years, Api Integration, Automation
Ai-Powered Dev Workflows (Copilot, Claude Code) – Advanced, 2+ Years, Team Enablement
Prompt Engineering – Advanced, 2+ Years, Developer Teams

Languages

German

Native

Russian

Native

English

Advanced

Education

Bachelor of Science · Media Computer Science

Statistics

Experience

Total positions 6

Experience in Information Technology 6.5 y

Avg length 2 y 6 m

Longest experience 3 y 11 m

Expertise

Recent roles Founder, Principal Software Architect & Technical Consultant, Senior Angular Consultant & Architect, Senior Angular Software Engineer

Main industries Information Technology, Professional Services, Manufacturing

Main business areas Information Technology, Product Development, Research and Development

Qualifications

Highest degree Bachelor

Profile

Created

March 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Gregor based?

Gregor is based in Berlin, Germany and prefers 100% remote projects.

What languages does Gregor speak?

Gregor speaks the following languages: German (Native), Russian (Native), English (Advanced).

How many years of experience does Gregor have?

Gregor has at least 9 years of experience. During this time, Gregor has worked in at least 6 different roles and for 6 different companies. The average length of individual experience is 2 years and 7 months. Note that Gregor may not have shared all experience and actually has more experience.

What roles would Gregor be best suited for?

Based on recent experience, Gregor would be well-suited for roles such as: Founder, Principal Software Architect & Technical Consultant, Senior Angular Consultant & Architect, Senior Angular Software Engineer.

What is Gregor's latest experience?

Gregor's most recent position is Founder, Principal Software Architect & Technical Consultant at Hold My Code GmbH.

What companies has Gregor worked for in recent years?

In recent years, Gregor has worked for Hold My Code GmbH, SoftwareOne, KPS AG, and VIGNOLD Group.

Which industries is Gregor most experienced in?

Gregor is most experienced in industries like Information Technology, Professional Services, and Manufacturing. Gregor also has some experience in Energy and Retail.

Which business areas is Gregor most experienced in?

Gregor is most experienced in business areas like Information Technology, Product Development, and Research and Development.

Which industries has Gregor worked in recently?

Gregor has recently worked in industries like Information Technology, Professional Services, and Retail.

Which business areas has Gregor worked in recently?

Gregor has recently worked in business areas like Information Technology, Product Development, and Research and Development.

What is Gregor's education?

Gregor holds a Bachelor in Media Computer Science.

What is the availability of Gregor?

Gregor is immediately available full-time for suitable projects.

What is the rate of Gregor?

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