Freelance · Senior Engineer · Consultant

Paweł Trela

I help companies build stable web apps, automate processes and scale online sales.

Services

Not "I build websites" — I solve specific business problems.

Ruby on Rails

Backend apps, REST APIs, legacy migrations, DB optimisation. Architecture that scales.

Rails 4/5/6/7/8PostgreSQLMySQLRedisSidekiq

WordPress & WooCommerce

Custom themes, plugins on demand, WooCommerce stores, payment and ERP integrations.

Custom themeACFWooCommerceREST API

Magento 2

Module development, store migrations, integrations with wholesalers and B2B systems. Serious e-commerce.

Magento 2PHPB2BIntegrations

Technical SEO

Technical audits, Core Web Vitals optimisation, schema markup, crawl budget, page speed — SEO from the code side. I also cover visibility in AI chats (ChatGPT, Perplexity, Gemini) — the new channel replacing traditional search.

Core Web VitalsSchema.orgAI SearchPageSpeed

AI Optimisation

Integrating LLMs into business processes, prompt engineering, AI-powered automation, chatbots and content pipelines.

LLM APIOpenAIPrompt EngineeringAutomation

Consulting & Architecture

Code review, technology selection, system design. For larger projects I bring in trusted specialists — I'm accountable for the whole.

Code ReviewSystem DesignTech Due Diligence

How I work

01

Diagnosis

I talk about the problem, not the technology. First I understand the business, then I propose a solution.

02

Design

I propose architecture matched to scale. No over-engineering, no shortcuts.

03

Delivery

I deliver with regular milestones. For bigger projects I bring in trusted specialists.

04

Support

Available after launch. I monitor, optimise, evolve.

Tech Stack

Ruby
Rails
PostgreSQL
MySQL
Redis
Sidekiq
WordPress
WooCommerce
Magento 2
OpenAI API
LLM / RAG
PHP
JavaScript
Docker
Linux
SEO

Recent posts

Ruby, Rails, e-commerce and more.

Have a project? Let's talk.

Write a few sentences about what you want to build. I'll reply within 24h.