Martynas.
Full-stack · AI · Shopify

Full-stack developer building AI-powered products.

I build web apps end to end, and bring AI into both the product and the way it gets built. Previously Brickshare and Danske Bank.

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Martynas, full-stack developer
Martynas Mexico City
01

Selected Work

5 projects
01

Leannoku

Web SaaS platform

A creator marketing stack: AI research and script generation, one product fanned into 40+ ad creatives, and multi-platform scheduling and publishing.

Bun · PostgreSQL · React leannoku.com
02

Tiergain

Shopify app

Mix and match bundle app with tiered discounts, free gifts, and shipping rewards, built on a discount function and theme extensions, plus a suite of merchant micro-apps.

Shopify Functions · Liquid · React tiergain.com
03

Abu

Shopify · AI

A complex product-recommendation and upsell app for Shopify: AI-powered recommendations across the product page, cart, and post-purchase, with discount bundles, analytics, and a full merchant dashboard.

Shopify · Remix · AI
04

avenorflow

AI static ad platform

One product expands into 40+ slot-locked ad-format nodes on a canvas, each regenerated with LLMs.

React Flow · Python · SQLite
05

Golf club configurator

Shopify

Custom product configurator for Avoda Golf with real-time build, pricing, and validation, built into the Shopify storefront.

Shopify · JavaScript avodagolf.com
02

Clients

Brands & products
Leannoku Leannoku
Tiergain tiergain
Abu
Meermin Shoes
2(X)IST
Avoda Golf
Le Melo
Drop by Drop
03

Testimonials

8 reviews
★★★★★
Excellent service rendered by Martynas! He was professional and efficient, ensuring that all our expectations were met. We are delighted with the overall experience and highly recommend his services to others.
— Av One
★★★★★
Superb work! Very hands on and easy to work with.
— Meermin Shoes
★★★★★
A very solutions-oriented pro! Martynas was a pleasure to work with.
— Parting Stone
★★★★★
Loved working with Martynas! Fast and clear.
— Parting Stone
★★★★★
Exactly what I needed done!
— Puff Herbals
★★★★★
Kind and understandable. Thank you for your work!
— Heir
★★★★★
Great, thank you.
— Fosse Living
★★★★★
Thank you.
— Carlota High Heels
04

Stack

Languages
TypeScript, JavaScript, Python
Frontend
React, Astro, Tailwind CSS
Backend
Node.js, GraphQL, PostgreSQL, REST APIs
AI
LLM integration, agents, RAG, prompt pipelines
Commerce
Shopify, Liquid, Functions, theme extensions
Craft
UI / UX, performance, design systems
05

About

A developer with a designer's eye, building products end to end.

I spent five years as a software engineer at Danske Bank and three years building Brickshare, a real-estate crowdfunding platform. Across enterprise and startups, I've gone from systems used at scale to greenfield products. My background is in design, which shapes how I build.

Today I build web and mobile apps with AI inside, from assistants and agents to RAG systems, end to end. I also spend a lot of my time on Shopify, where I've shipped two public production apps and dozens of private ones.