Full-Stack Development Experts

Berlin-Based PHP & React Development Experts Building Solutions That Scale

A Berlin-based consultancy with 18+ years of expertise in custom software development, legacy code modernization, and digital transformation. We rescue stalled vibe-coded projects, harden AI-generated code for production, and help businesses across Europe build secure, high-performance web applications with PHP/Symfony, React/Next.js, and cloud-native architectures.

18+ Years Experience
60+ Projects Delivered
Modern Tech Stack

React, Next.js, PHP, Symfony

Code Quality

Clean, maintainable code

Full-Stack Expertise

Front-end to back-end

Custom Software Development Services

We help tech-driven businesses across Europe build, optimize, and scale with expert PHP/Symfony and React/Next.js development. Whether you need to rescue a stalled vibe-coded project, secure an AI-generated codebase, build from scratch, or modernize legacy systems, we bring proven expertise to accelerate your growth.

Modern Tech Stack: PHP, React & Cloud Infrastructure

PHP programming language
Symfony framework

PHP & Symfony

Expert backend development with PHP 8 and Symfony 6+

React library
Next.js framework

React & Next.js

Modern frontend with React 18, Next.js 14, and TypeScript

Cloud & DevOps

AWS, Docker, CI/CD pipelines, and infrastructure automation

Database & API

MySQL, PostgreSQL, MongoDB, and RESTful/GraphQL APIs

Latest Insights

Explore our latest thoughts on software development, technology trends, and best practices.

12 min read

Selling Software Engineering Time Across the EU: VAT, Reverse-Charge, and Permanent-Establishment Rules That Decide Where You Owe Tax

A Berlin consultancy invoicing a French client, a German GmbH placing engineers on-site in Amsterdam — these trigger different VAT and permanent-establishment outcomes most founders only discover during a cross-border audit. Here is the practical map.

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9 min read

The Five npm Packages AI Coding Assistants Keep Recommending — and Why Each One Belongs Nowhere Near Production

Cursor, Copilot, and ChatGPT keep suggesting the same handful of npm packages — and five of them are deprecated, supply-chain risks, or production landmines. Here is what we find in real vibe-coded codebases, why each package is dangerous in 2026, and the modern replacements we install during every rescue.

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11 min read

Migrating 700K Lines of Doctrine 1.x: A Schema-First Path to Doctrine 3 Without a Code Freeze

A real-world migration playbook for large Doctrine 1.x codebases: schema-first entity generation, a dual-ORM bridge that keeps legacy controllers alive, a snapshot-based test harness, and the four-month cutover sequence that retired 700K lines without freezing feature work.

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9 min read

DORA for SaaS Vendors to European Banks: The Subcontractor Register, Exit Strategy, and Pen-Test Reports You Now Need

DORA is no longer just a bank problem. If you sell software to European financial institutions, you are an ICT third-party provider — and your contracts, runbooks, and pen-test cadence are now subject to supervisory scrutiny. Here is the vendor-side playbook.

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11 min read

Why Your RAG Pipeline Returns Confident Garbage: Chunk Sizing, Reranking, and the Eval Harness You Need Before Shipping

RAG demos look great — production RAG fails predictably. Here is what goes wrong with chunking and reranking, and the four-question eval harness that catches 80% of regressions before they reach users.

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11 min read

From Pricing Page to Stripe: The Engineering Decisions That Determine Whether Your Net Revenue Retention Cracks 110%

Most SaaS teams wire up Stripe in a weekend and call it done. The teams hitting 110%+ NRR make a different set of engineering decisions — on proration, upgrade flows, dunning, and metered billing — that compound quietly into millions of ARR.

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Let's Work Together

Sandor Farkas - Founder and Lead Developer at Wolf-Tech Berlin

Sandor Farkas - Founder & Lead Developer

Let's discuss your project requirements. Free initial consultation to explore how we can help you achieve your technical goals.