Software Engineer - Shopify Developer

Always questioning the world around me, I enjoy reading, music, guitar, gaming, gym & archery. Used to live in the World of Warcraft as a teenager, defeating the Lich King with the guild <Digital Crew> that I led. I hold a bachelors degree in Software Engineering and have been working with global brands for the past nine years.

Links:

Contact:

filiporastovic@gmail.com

About

Building, migrating, and optimizing ecommerce stores at scale.

I’ve spent the past nine years engineering Shopify and Laravel & WordPress systems for fast-moving ecommerce brands. My background is software engineering, but my day-to-day is solving the messy, technical problems that actually move revenue: migrating huge catalogs without breaking data integrity, building custom Shopify features, optimizing performance, and automating workflows with code and AI.

I work with modern stacks and AI-assisted development to build faster and deliver cleaner solutions. At Perform Digital Media (PDM), my work spans deep technical development, engineering management, and client communication – bridging the gap between code, design, and business outcomes.

What I do daily

• Build new Shopify pages, landing pages, and custom sections
• Write custom JavaScript, Liquid, and Shopify Functions
• Develop and integrate custom Shopify apps
• Implement checkout extensibility and B2B functionality
• Handle CMS migrations, including Python-based automation for 10k+ product imports
• Perform complex SQL migrations for WordPress and Shopify
• Set up performance optimization, speed tuning, analytics, and debugging
• Integrate third-party apps and fix their conflicts
• Ensure pixel-perfect builds from Figma
• Lead designers and developers, delegate tasks, and review code
• Manage client communication, calls, expectations, and delivery timelines
• Keep multiple projects running smoothly while keeping clients happy

Background

I hold a Bachelor’s in Software Engineering and have worked with global brands including Google, Johnson & Johnson, Cosy House Collection, Bare Home, Linjer, and Hey Nutrition. My work blends engineering, CRO principles, and product thinking — focusing on reliability, performance, and revenue impact.

Before specializing in Shopify and backend systems, I also worked in 3D (Cinema 4D, Octane Render) and shipped projects for major brands. That experience gives me an advantage when working with design-heavy builds and cross-functional teams.

Core Skills

• Shopify Theme Development & Custom Features
• Shopify Functions, Apps, Checkout Extensibility
• HTML, CSS, JavaScript, Liquid, PHP, Laravel
• Python automation for migrations + tooling
• WordPress development + complex SQL migrations
• Speed & Performance Optimization
• CRO & A/B Testing fundamentals
• UX/UI implementation from Figma
• Data-driven problem solving

Mentions in Media (Mostly Serbian)

I used to do 3D art a bit, it got kind of viral. (Offers from Google & Microsoft)

Cool Pictures

About The Images

I rendered these images in Cinema 4D using Octane Render from 2020-2023. I was really obsessed with 3d art back then. I’m very proud that both Google and Microsoft reached out to do 3D work for them. However I don’t do much 3D these days.

The 3D models in images above are mostly downloaded high quality assets, put in a procedurally generated background setting.

The lighting & compositions, my favourite topics, are very traditional in every image. I’m trying to highlight form of the objects, lighting one half and leaving the other one in shadow.

You can download my stuff for free! If you print it, shoot me a message, I want to see how it looks on your wall! There’s much more on the blog below.