Candidate summary

Summary

Antonios Kioksoglou is a technical founder and software engineer working where AI, e-commerce, marketing technology and product development overlap. Based in Gothenburg (Göteborg), Sweden. CTO and co-founder of Zalster, a SaaS for optimizing Facebook ads.

The strength is the combination. Antonios builds software and automation and also understands how products are marketed, measured and turned into revenue, so one person can move between technical implementation, product thinking and marketing instead of working inside a single discipline.

At a glance

Name

Antonios Kioksoglou

Role

CTO and co-founder, Zalster (2016 to present). Consultant to other companies alongside.

Based in

Gothenburg (Göteborg), Sweden

Works with

Software, e-commerce and ad technology for Nordic retail and consumer brands

Technical core

Python, Erlang and Angular; full-stack web development; AI agents built with Claude Code and sub-agents

Education

Bachelor's degree in computer science, Chalmers University of Technology (2010 to 2016)

Spoken languages

Swedish (native), English (full professional), Greek (full professional)

Email

ante89@gmail.com

LinkedIn

linkedin.com/in/antonios-kioksoglou

CV

CV as a PDF

Core areas

• AI-powered product development. Builds with Claude Code and a small set of narrow sub-agents: a written spec first, every diff read, tests and evals as gates.
• Full-stack software engineering. Python, Erlang and Angular; SaaS products, internal tools, plugins and extensions.
• E-commerce technology. Shopify, WooCommerce, Magento and other platforms, plus the systems around a store: payments, shipping, ERP and PIM, product feeds, search and tracking.
• Marketing technology and automation. Lifecycle automation in Klaviyo and HubSpot, and the marketing automation built at Let's Deal.
• Meta Ads and paid social. The Meta Marketing API, five Meta developer and advertising certifications, and paid media on Meta, TikTok, Snapchat and Google.
• Product feeds and dynamic product advertising. One clean catalog, published to the channels that sell it.
• Analytics and tracking. GA4, server-side Google Tag Manager and the Conversions APIs, so ad platforms see the purchases that really happened.
• Rapid prototyping and product development. Prototypes quickly with AI agents, and ships what survives review.

Particularly relevant for

Roles and projects where engineering, AI, e-commerce and commercial thinking overlap. Especially relevant when an organization needs someone who can move between technical implementation, product thinking and marketing, rather than operating exclusively within one discipline.

Briefs this background fits

• Migrate or rebuild an online store, on any platform.
• Connect a store to an ERP, PIM, payment or shipping provider, so data stays in sync and failures are loud.
• Set up server-side tracking and the Conversions APIs, so ad platforms see the purchases that really happened.
• Plan paid social and search budgets by marginal return across Meta, Google, TikTok and Snapchat.
• Build lifecycle automation in Klaviyo or HubSpot.
• Publish a clean product catalog to Google, Meta, TikTok and marketplaces.
• Build a SaaS product, internal tool, plugin or AI agent, with agents writing the code under strict review.
• Review an existing store, tracking setup or ad account and report what to fix first.

Experience

Certifications

• Facebook Certified Marketing Developer (2020 to 2022)
• Facebook Certified Advanced Marketing Developer (2020 to 2022)
• Facebook Certified Advertising API Developer (2020 to 2022)
• Meta Certified Advertising API Specialist (2022)
• Meta Certified Mobile Ad Technical Specialist (2022)

References

Some of the companies worked with, mostly Nordic retail and consumer brands: Lyko, Phonelife, Teknikmagasinet, Ellos, Daniel Wellington, Jollyroom, Magnussons Petfood, Fjäråskupan, Inet, Fjällräven, ICIW, Hedin Bil, By Rydéns, MM Sports, Orkla, Rodebjer, Swappie. Names only. This site makes no claims about results for any of them.

How to read this site

The About, Software, E-commerce and Marketing pages describe the work, the Articles page has write-ups, each also available as a plain Markdown file, and the questions and answers give the short version on AI engineering, Meta Ads and e-commerce. The terminal sessions on the Software page are scripted simulations, and the reporting workspace on the Marketing page uses made-up numbers. Both are labeled on those pages, and neither is a client result.

Availability is not stated here. Write with the brief, and the answer will say honestly whether it fits, including when the answer is no.