Freelancer profile translated to English.
Back to original languageAbout Hennadii
Build just a standard web application – or an intelligent business platform?
In today's digital landscape, "clean code" is merely the entry ticket.
What you really need is asecure, scalable systemthat uses modern **AI specifically to automate your business processes**.
I am aSolution Architect with over 11 years of experience, combiningenterprise backend engineering (PHP / Laravel / Symfony)withmodern AI integration.
While many developers use AI to write code, I use architectural expertise to integrate secure AI agents and intelligent workflows directly into your application.
How I help you succeed
🚀 AI-powered SaaS Architectures
I develop platforms where AI is not a gimmick, but core functionality:
- Intelligent Admin Dashboards with FilamentPHP
- Custom RAG (Retrieval-Augmented Generation) systems that securely interact with your database
- AI-powered automation of internal processes
🏗 Enterprise Reliability
I work with the discipline of a Senior Engineer:
- Strict typing & clean architecture
- Optimization of complex SQL queries for performance
- Focus on data security and maintainability
Things that no-code or low-code tools cannot achieve.
⚡ Fast MVP Implementation
With modern stacks (TALL Stack, Filament, Livewire), I deliver production-ready MVPs in weeks instead of months – ideal for:
- Faster market entry
- Investor discussions
- First sales
Why work with me?
I am Founder & CEO, CTO, and Lead Developer.
I know: You don't pay for code – you pay for a business outcome.
I communicate clearly, work independently, and handle your budget as carefully as if it were my own.
German
Fluent
English
Fluent
Ukrainian
Native or bilingual
Russian
Native or bilingual
Remote only
Primarily works remotely
Experience
- Salvador Tennis GmbH
On Malt
Membership Structure Design and Independent Acceptance (Multi-Tenant SaaS)SPORTSJune 2026 - June 2026Göttingen, GermanyTwo-part contract on a multi-tenant SaaS platform (Laravel): first architecture design, then independent acceptance of the implemented step.Part A, Structure Design: Specification of a membership tier for "one person, multiple organizations" (one identity, own role and view per organization), including schema, migrations, and mandatory tests as a basis for implementation.Part B, Adversarial Acceptance: Tested the finished build (memberships, data protection-compliant anonymization, access gating) with own attack tests, each finding evidenced, and a clear Go/No-Go at the end. I then implemented and verified the few open requirements myself.Working method: independent and evidence-based, multi-stage adversarial testing, honest expert assessment instead of generic checklists, reports and handover in German. - Salvador Tennis GmbHSecurity and Architecture Review (Authorization Layer and Data Model)SPORTSJune 2026 - June 2026Göttingen, GermanyIndependent security and architecture review plus adversarial acceptance of the authorization and data model for highly sensitive personal data of a multi-tenant SaaS (Laravel), with corresponding high data protection requirements.Focus areas:
- Data structure design for "one person, multiple organizations" (membership edge): one identity, own role and view per organization, including schema, migrations, and mandatory tests as a basis for implementation.
- Adversarial acceptance of the implemented step: Tenant boundary, authentication, and role-based access gating tested with own attack tests, each finding evidenced, plus a clear Go/No-Go.
- Anonymization instead of deletion, including a two-stage logic for linked contacts; the core secured so that the rule can no longer be bypassed on any path.
- DB-side tenant isolation via composite foreign keys, tested against a real production database instead of just against the local test database.
Working method: independent and evidence-based (no finding without proof), multi-stage adversarial testing, honest expert assessment instead of generic checklists, reports and handover in German. - Salvador Tennis GmbHFramework Upgrade and Operations/Deployment Layer: Go-Live HardeningSPORTSJune 2026 - June 2026Göttingen, GermanyIndependent security and architecture review plus setup of the operations layer for a multi-tenant SaaS (Laravel), with particularly sensitive personal data and corresponding high data protection requirements.Focus areas:
- Evidence-based security review of tenant isolation, authentication, and the authorization and data model, each finding evidenced, plus own adversarial attack tests and a clear Go/No-Go.
- Framework upgrade to the current Laravel version with strict CI gate (static analysis at the highest level, deprecation-strict tests, automated dependency security check).
- Operations: failure-free deployment pipeline (atomic releases, health check and automatic rollback), daily backups with tested restore drill, off-site backup and production hardening.
Working method: independent, evidence-based, honest expert assessment instead of generic checklists, reports and handover documentation in German.
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Education
- Building with the Claude APIAnthropic Education2026
- Claude Code in ActionAnthropic Education2026