Description

I help startups, small businesses, and creative clients turn ideas into working web applications. I build full-stack web apps in Ruby on Rails, with a particular focus on API integrations, OAuth flows, AI features powered by the OpenAI API, and clean admin panels that non-technical clients can actually use.

Recent work includes TuneLoop, a music discovery app combining the Spotify, iTunes, Deezer, and Recco Beats APIs with OAuth login; a custom musician portfolio website with a fully editable admin panel for content and layout; and an AI chatbot that recommends music gear through natural conversation using the OpenAI API.

What sets me apart: I'm a working musician and producer based in Amsterdam, so I bring real creative-industry experience to projects in music, audio, and the arts. That said, I'm equally interested in problems outside that world. Curious by nature, detail-oriented, and at my best when a project has a creative challenge at its core.

Typical projects I take on:

Custom Rails applications and MVPs
Third-party API integrations (Spotify, OpenAI, payment platforms, etc.)
Custom admin panels and lightweight CMS solutions
AI feature integration into existing web apps
Frontend polish with clean, considered CSS

Industry field of expertise

Languages

English
Native or bilingual
Lithuanian
Native or bilingual
Russian
Fluent
Dutch
Conversational

Workplace preferences

Can work on-site

Amsterdam (up to 40km)

Self-employed / Freelance
Full-Stack Web Developer - TuneLoop
DIGITAL AND IT
April 2026 - April 2026
Amsterdam, Netherlands
TuneLoop - Spotify-powered music discovery web app.

TuneLoop is a Rails 8.1 application I built end-to-end that connects to a user's Spotify account and helps them rediscover their library through audio-feature
analysis and mood-based recommendations.

After signing in via Spotify OAuth, users see their saved tracks and can:
- Analyse any track's audio features (danceability, energy, valence, tempo, acousticness, etc.) via the ReccoBeats API.
- Get Similar tracks by tweaking sliders for each feature - the app runs a weighted Euclidean-distance search over a 114,000-track dataset, and returns matches with
a "Match %" score.
- Find a track by mood - pick a mood (Happy, Sad, Calm, Energetic, Romantic) and the app recommends a track from the user's taste profile shifted toward that
emotional target.
- Preview tracks inline using Deezer audio previews and open them directly in Spotify.

Tech stack: Rails 8.1, PostgreSQL, Hotwire (Turbo + Stimulus), Propshaft, importmap, Solid Queue / Solid Cache / Solid Cable, deployed on Heroku. SQL similarity search, background jobs for library caching, Turbo Streams for progressive loading, and three external API integrations (Spotify, ReccoBeats, Deezer).

Built solo as my final project at Le Wagon - covers OAuth, third-party APIs, background processing, real-time updates, and data-driven recommendations.
Ruby on Rails Ruby PostgreSQL OAuth API REST
Freelance / Self-employed
Full-Stack Web Developer - Custom CMS Build
DIGITAL AND IT
April 2026 - April 2026
Amsterdam, Netherlands
Designed and built a custom personal/portfolio website for a professional musician, delivered as a fully responsive Ruby on Rails 8 application. The site presents the artist's biography, discography, video catalogue, upcoming live shows, lessons offering, merch store, and contact form in a single cohesive experience.

Key contributions:
- Architected and developed the full stack from scratch using Rails 8, Hotwire (Turbo + Stimulus), and Dart Sass for a fast, SPA-like browsing experience without a heavy JavaScript framework.
- Built a custom CMS using ActiveAdmin and Devise so the artist can independently manage releases, shows, videos, carousel images, merch items, and home-page content blocks without developer involvement.
- Integrated Cloudinary for optimized media delivery and Active Storage for asset management, ensuring fast load times across devices.
- Implemented a contact mailer pipeline, SEO meta tags, Open Graph data, favicon, and Google tags for discoverability.
- Containerized the application with Docker and configured Kamal for one-command deployment to production, backed by PostgreSQL and Solid Queue/Cache/Cable.
- Developed responsive, mobile-first layouts including a custom hamburger navigation, image carousels, and dynamic content blocks.

Outcome: a maintainable, self-managed platform giving the artist full editorial control over their online presence.
Ruby on Rails OAuth Ruby HTML/CSS PostgreSQL

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AI Software Development Bootcamp
Le Wagon
2026
Intensive 6-month full-stack development bootcamp with a specialization in AI. Curriculum covered Ruby, Ruby on Rails, JavaScript, HTML/CSS, SQL, and Figma, alongside AI application development using the OpenAI API. Final project: a chatbot that recommends music gear based on user needs and preferences, integrating an LLM with conversational UX design.

AI Software Development
Le Wagon
2026
https://kitt.lewagon.com/schoolings/48991/public_diploma?token=ccb7ede798d2c0fce27d4fc0e3d1f41b7299547814cd77d5c8febce715d9593b
Ruby on Rails Git Figma HTML/CSS PostgreSQL JavaScript OpenAI Claude Ruby SQL

Web Designer

Andrius Dereviancenko

Creative Web Developer | Rails & APIs

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