Rails rescue, product ownership, and practical AI

AI customer service platform that answers across chat, voice, and social channels only from approved knowledge, with source citations and human handoff when confidence is low.

Problem: Regulated teams need AI support agents that can explain where answers came from instead of hallucinating or improvising policy-sensitive responses.

What I did:

• Built a source-grounded AI support platform for web chat, phone calls, Messenger, and Instagram DMs
• Designed workflows around approved knowledge bases, citations, confidence thresholds, and honest fallback
• Added voice/transcription flows and supervisor-friendly searchable transcripts
• Shipped an EU-hosted, GDPR-aware product with an open changelog and demo/contact funnel

Tech: Ruby on Rails, AI/LLM workflows, RAG, voice transcription, omnichannel messaging, GDPR-aware infrastructure

Compliance operating system for Croatian and EU organizations managing GDPR, NIS2, DORA, and EU AI Act obligations.

Problem: Compliance work usually lives across spreadsheets, documents, email threads, scans, and disconnected evidence folders, making audits and ongoing readiness painful.

What I did:

• Built a platform for GAP assessments, readiness scoring, registers, findings, evidence, and audit exports
• Modeled workflows for GDPR ROPA/DSR/DPIA, NIS2 incident timelines, DORA controls, and EU AI Act inventories
• Connected technical scanning and compliance findings into one operational workspace
• Localized the product for Croatian organizations and EU regulatory language

Tech: Ruby on Rails, PostgreSQL, compliance workflows, document exports, security scanning, EU regulatory frameworks

Web backend development and R&D support for one of the most recognizable brands in digital music.

Problem: A large, established streaming platform needed reliable backend contributions and fast technical exploration for a new product initiative.

What I did:

• Contributed to web-facing backend systems inside an established product codebase
• Supported R&D and prototyping for a new product direction
• Worked within existing engineering standards and delivery workflows at scale
• Brought practical subscription/media-product experience from the broader Rhapsody/Napster ecosystem

Tech: Ruby on Rails, PostgreSQL, Redis

Music streaming/community product work for Gimme Radio — now Gimme Metal — in the same digital music lineage as Napster and Rhapsody.

Problem: Niche music communities need more than a generic catalog: they need programming, live context, discovery, subscriptions, and reliable fan-facing product flows.

What I did:

• Worked on production product/backend development for a music streaming and fan community platform
• Applied experience from subscription-style media products and the Napster/Rhapsody ecosystem
• Helped support consumer-facing music product workflows where reliability and iteration speed mattered

Tech: Ruby on Rails, music streaming products, subscription-style product workflows, production backend systems

Medium-term housing marketplace for interns, students, and recent graduates in Washington, D.C.

Problem: After multiple teams failed to deliver, the product needed a focused senior team to stabilize direction, rebuild, and launch.

What I did:

• Took over an existing troubled build and helped move it toward a working product
• Implemented payment flows, production features, and core marketplace functionality
• Fixed and optimized Rails code and RSpec tests while keeping delivery moving

Result: Rebuilt and launched a revenue-generating product in 8 months.

Tech: Ruby on Rails, React, PostgreSQL, Redis, Heroku

Automotive ecommerce and product-data work around performance tuning chips, including a new RaceChip.hr webshop being built on Spree.

Problem: Vehicle tuning ecommerce needs accurate product fitment data, reliable catalog workflows, and a storefront that can handle model-specific compatibility without confusing buyers.

What I did:

• Worked on backend systems for a high-traffic commerce/product platform
• Supported PostgreSQL-backed services and product data workflows
• Building up a new RaceChip.hr webshop on Spree for the Croatian market

Tech: Ruby on Rails, Spree, PostgreSQL, ecommerce, product-data systems

Movie discovery platform aggregating ratings and metadata from IMDB, Rotten Tomatoes, Metacritic, TMDB, OMDB, and other sources. Featured on Hacker News, Product Hunt, and Fast Company; used by 100,000+ people per month at its peak.

Problem: People needed a fast, pleasant way to discover what to watch across a large movie catalog with fragmented data sources.

What I did:

• Built automated ingestion/update pipelines for 250,000+ movies
• Designed caching and data delivery with Elastic and Redis for a fast user experience
• Implemented advanced filtering and recommendation flows for movie discovery
• Kept external API data synchronized and production-ready through background jobs

Result: A high-traffic, widely shared product with strong community reception and reliable daily data refreshes.

Tech: Ruby on Rails, PostgreSQL, Elastic, Redis, Thumbor

Fast Company coverage

Collaborative financial research platform for annotating SEC filings and other complex financial and political documents.

Problem: SEC filings are large, irregular HTML documents that are difficult to parse, annotate, and integrate into partner workflows.

What I did:

• Built the Rails backend and deployed the production infrastructure from scratch
• Created a Nokogiri-powered parser for deeply nested SEC HTML documents
• Integrated the annotation interface into external partner platforms
• Supported product owners during peak-traffic document releases and U.S. election cycles
• Onboarded and trained developers as the project matured

Tech: Ruby on Rails, PostgreSQL, Nokogiri

Wall Street Journal coverage

Backend development support for an organic period and body care brand with ecommerce and subscription operations.

Problem: A growing D2C brand needed focused backend help inside an existing production product without disrupting existing workflows.

What I did:

• Supported backend services behind product catalog, subscription management, and order processing
• Stepped into an existing codebase for targeted delivery
• Helped keep ecommerce operations moving for a mission-driven product team

Tech: Ruby on Rails, PostgreSQL

Fan engagement platform connecting audiences with celebrities and creators across sports, music, entertainment, and pop culture.

Problem: Consumer fan platforms need reliable product flows for live access, paid experiences, celebrity/talent management, and audience engagement without making the experience feel transactional.

What I did:

• Worked on Ruby/Rails product development for a fan-to-celebrity engagement platform
• Supported product flows around talent, fan interactions, and consumer-facing experiences
• Brought practical experience from music/community products into a broader entertainment platform

Tech: Ruby on Rails, PostgreSQL, consumer product workflows, fan engagement platforms

Data ingestion system for SessionM, a customer engagement and loyalty platform later acquired by Mastercard.

Problem: Loyalty and personalization platforms depend on high-volume customer interaction data arriving reliably from many sources, with no room for silent data loss or fragile processing.

What I did:

• Built Ruby/Rails-backed ingestion workflows for customer events, profile updates, and interaction data
• Focused on reliability, validation, recovery, and data integrity across the processing pipeline
• Helped support the infrastructure behind data-driven loyalty and personalization experiences

Result: A foundational ingestion system supporting SessionM’s customer engagement platform before its acquisition by Mastercard.

Tech: Ruby on Rails, PostgreSQL, Redis, data ingestion, customer engagement platforms

Members-only fashion marketplace for women to exchange clothing and accessories, covered by Vogue and Crunchbase.

Problem: Fashion resale and closet-sharing products need to make inventory listing, discovery, social trust, and purchase flows feel editorial and community-driven rather than like a generic marketplace.

What I did:

• Worked on product development for a consumer fashion marketplace
• Supported marketplace-style flows around listings, profiles, discovery, and transactions
• Brought production Ruby/product experience to a design-sensitive consumer ecommerce product

Tech: Ruby on Rails, marketplace workflows, consumer ecommerce, fashion/social commerce

Vogue coverage