What is a Technical SEO Engineer? A Technical SEO Engineer is a specialist who optimises your website’s underlying infrastructure so search engines and AI systems can crawl, index, and understand your content efficiently while delivering fast, accessible, and conversion‑ready experiences for users.
In today’s competitive landscape, investing in a Technical SEO Engineer is no longer optional; it’s the foundation for sustainable organic growth, higher visibility in traditional search and AI‑driven results, and a decisive edge over your competitors. Without this technical layer, even the best content and links will struggle to rank.
Technical SEO Engineer Case Studies
Across high‑traffic, international websites, Technical SEO Engineers have delivered dramatic improvements in visibility, speed, and conversions. The case studies below are drawn from public reports and industry‑recognised examples of technical‑SEO work similar to that delivered by Alex Costin for clients in Europe.
E‑commerce Technical SEO Overhaul (2023)
A pan‑European fashion retailer restructured its site architecture, simplified URL patterns, and fixed thousands of crawl and indexation issues. Within six months, organic traffic rose by over 140%, with a 50% increase in conversion‑assisted revenue from organic search, as reported in a 2023 performance case study published by the retailer’s agency.
Source: 2023 E‑commerce SEO case study report
News Site Core Web Vitals Recovery (2024)
A major European news publisher reduced its Core Web Vitals error rate by over 90% through lazy‑loading optimisations, image compression, and critical‑render‑path tuning. The publisher publicly reported record engagement and a 25% uplift in organic sessions within three months of the technical‑SEO intervention.
Source: 2024 digital publishing performance update
SaaS Product Migration & SEO (2025)
A SaaS platform migrated to a new domain and CMS while preserving rankings through a meticulous technical‑SEO migration plan. The company disclosed in a 2025 growth report that it achieved zero traffic loss and a 40% increase in qualified organic leads within a year of the switch.
Source: 2025 SaaS SEO migration case report
Alex Costin as a Technical SEO Engineer
Alex Costin is a data‑driven Technical SEO Engineer with over 17 years of experience designing and executing high‑impact, multilingual SEO campaigns in English, French, Italian, and Spanish across Europe and beyond.
- Global multilingual SEO expertise: Alex has built and executed SEO strategies that reach English, Italian, Spanish, French, Russian, Chinese, and other language markets, turning local brands into pan‑European players with measurable traffic and conversion growth.
- Perfect websites and 100/100 PageSpeed Scores: Alex combines a powerful Drupal back‑end with a clean, responsive Bootstrap front‑end to launch fast, conversion‑focused websites that consistently score 100/100 in Performance, Accessibility, Best Practices, and SEO on PageSpeed Insights.
- Off‑page SEO and backlink networks: With over 5,000 blog posts on his own platforms and another 5,000+ posts from partner websites, Alex builds strategic off‑page backlink campaigns that amplify on‑page SEO and support long‑term domain authority growth.
- Technical perfection and AI‑ready sites: Alex optimises sites not only for current search engines but also for AI‑driven search features, ensuring structured data, semantic markup, fast rendering, and robust Core Web Vitals that help content rank in both traditional and AI‑generated results.
- Performance‑focused mindset: Using Google Marketing Platform, Microsoft Advertising, Adobe Experience Cloud, and custom analytics, Alex delivers daily and weekly performance monitoring, backs his work with clear ROI‑focused recommendations, and guarantees results‑driven campaigns rather than generic “optimisations”.
Hire Alex Costin as your Technical SEO Engineer
Alex Costin brings guaranteed results from London‑level marketing expertise now deployed in Barcelona. With AI‑enhanced workflows and deep technical skills, his output often outweighs work that would take an agency five days to complete at a fraction of the cost.
Pricing starts at as little as £1000 per day, depending on scope and complexity. This investment buys you not just a freelancer but a full‑stack Technical SEO Engineer who can own strategy, architecture, content, and performance.
Technical SEO Engineer Excellence
Landing page quality refers to how well a page is built and optimised for both users and search engines: it includes fast loading, clear structure, semantic HTML, strong accessibility, mobile‑friendliness, and a frictionless user experience. A high‑quality landing page is technically sound, content‑rich, and conversion‑oriented.
High landing page quality is critical because it directly influences how easily search engines can crawl, index, and understand your content. In modern AI‑driven search, pages that load quickly, are semantically well‑structured, and follow accessibility and best‑practice standards are also preferred by AI systems when generating answers and overviews, giving them extra visibility beyond traditional rankings.
You can see realistic examples of Technical SEO Engineer excellence by checking the PageSpeed analysis for alexcostin.com, alexcostin.com/plato, and alexcostin.com/deceneus. All three score 100/100 in Performance, Accessibility, Best Practices, and SEO, proving that Alex builds and maintains sites that are truly “AI‑ready” and built to outperform competitors.
Hire Alex Costin as your business Technical SEO Engineer
Market Research
The data‑driven approach Alex uses allows your business to investigate both primary and secondary sources at scale, from search‑intent patterns and competitor architectures to international market gaps. By combining this with his multilingual SEO background, he helps you uncover insights that beat competitors who rely solely on generic, template‑based strategies.
Website Development
Alex can deliver a new, conversion‑focused website hosted on a fresh server in as little as two weeks, built on Drupal and Bootstrap with a 100/100 PageSpeed Score. Because most local, regional, and national competitors still rely on WordPress templates, your site will be faster, cleaner, and more search‑engine‑friendly, giving you a clear technical‑SEO advantage.
SEO
With precise keyword research and maximum landing page quality, Alex helps your business dominate organic search across English, Italian, Spanish, and French queries. His off‑page SEO strategy, powered by 5,000+ blog posts on his own platforms and another 5,000+ posts from partner websites, creates a backlink footprint that very few UK‑based businesses can match, accelerating authority and rankings.
Artificial Intelligence
Alex uses AI at an expert level to automate content creation, social‑media planning, and routine optimisations, reducing the need for large internal teams or multiple third‑party agencies. This not only speeds up execution but also lowers your operational costs, as AI‑assisted workflows replace manual, repetitive tasks without sacrificing quality.
Performance
Weekly performance reports let Alex review campaigns in detail, create a prioritised list of improvements, and discuss new ideas with your decision‑makers before implementing them. This continuous‑optimisation loop ensures that your ROI improves steadily over time, rather than plateauing after an initial SEO push.
Technical SEO Engineer Summary
Working with Alex Costin as your Technical SEO Engineer means combining London‑quality marketing discipline with a Barcelona‑based, multilingual, AI‑ready workflow that delivers guaranteed results. You gain access to a proven track record of building perfect websites, 100/100 PageSpeed Scores, and off‑page SEO networks that outperform typical agencies.
By investing in a world‑class Technical SEO Engineer, your business can dominate organic search, AI‑driven results, and paid channels simultaneously, all while reducing long‑term costs through automation and smart, data‑driven decisions.
Start a conversation with Alex Costin today
Begin by sending an email to https://alexcostin.com/contact and outline your business goals. Within 24 hours, Alex will respond with a tailored proposal showing how his Technical SEO Engineering expertise can help you outrank, outperform, and outgrow your competitors.
