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I'm a software engineer with 9 years of experience building products that balance reliability, scale, and great user experience. Over the past 3 years, I’ve worked extensively with Elixir—first developing backend systems in e-commerce, and more recently leading the design and development of AI-driven automation tools and data systems for enterprise retailers. Earlier, as the first hire and Lead Frontend Engineer at an e-commerce startup, I helped grow the product from prototype to acquisition with multiple offers, including Roku. I enjoy working where engineering meets product—turning complex problems into elegant, impactful systems. Lately, I’ve focused on integrating LLM APIs (OpenAI, Anthropic, Gemini, Mistral, Perplexity), designing structured prompts, and building cost-efficient, distributed AI workflows in Elixir. I approach architecture with a product mindset, emphasizing reliability, observability, and scalable solutions. I’m energized by mentoring teammates, shaping engineering culture, and delivering outcomes that matter to the business.…I'm a software engineer with 9 years of experience building products that balance reliability, scale, and great user experience. Over the past 3 years, I’ve worked extensively with Elixir—first developing backend systems in e-commerce, and more recently leading the design and development of AI-driven automation tools and data systems for enterprise retailers. Earlier, as the first hire and Lead Frontend Engineer at an e-commerce startup, I helped grow the product from prototype to acquisition with multiple offers, including Roku. I enjoy working where engineering meets product—turning complex problems into elegant, impactful systems. Lately, I’ve focused on integrating LLM APIs (OpenAI, Anthropic, Gemini, Mistral, Perplexity), designing structured prompts, and building cost-efficient, distributed AI workflows in Elixir. I approach architecture with a product mindset, emphasizing reliability, observability, and scalable solutions. I’m energized by mentoring teammates, shaping engineering culture, and delivering outcomes that matter to the business.

Matic Teršek

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm a software engineer with 9 years of experience building products that balance reliability, scale, and great user experience. Over the past 3 years, I’ve worked extensively with Elixir—first developing backend systems in e-commerce, and more recently leading the design and development of AI-driven automation tools and data systems for enterprise retailers. Earlier, as the first hire and Lead Frontend Engineer at an e-commerce startup, I helped grow the product from prototype to acquisition with multiple offers, including Roku. I enjoy working where engineering meets product—turning complex problems into elegant, impactful systems. Lately, I’ve focused on integrating LLM APIs (OpenAI, Anthropic, Gemini, Mistral, Perplexity), designing structured prompts, and building cost-efficient, distributed AI workflows in Elixir. I approach architecture with a product mindset, emphasizing reliability, observability, and scalable solutions. I’m energized by mentoring teammates, shaping engineering culture, and delivering outcomes that matter to the business.…I'm a software engineer with 9 years of experience building products that balance reliability, scale, and great user experience. Over the past 3 years, I’ve worked extensively with Elixir—first developing backend systems in e-commerce, and more recently leading the design and development of AI-driven automation tools and data systems for enterprise retailers. Earlier, as the first hire and Lead Frontend Engineer at an e-commerce startup, I helped grow the product from prototype to acquisition with multiple offers, including Roku. I enjoy working where engineering meets product—turning complex problems into elegant, impactful systems. Lately, I’ve focused on integrating LLM APIs (OpenAI, Anthropic, Gemini, Mistral, Perplexity), designing structured prompts, and building cost-efficient, distributed AI workflows in Elixir. I approach architecture with a product mindset, emphasizing reliability, observability, and scalable solutions. I’m energized by mentoring teammates, shaping engineering culture, and delivering outcomes that matter to the business.

Available to hire

I’m a software engineer with 9 years of experience building products that balance reliability, scale, and great user experience. Over the past 3 years, I’ve worked extensively with Elixir—first developing backend systems in e-commerce, and more recently leading the design and development of AI-driven automation tools and data systems for enterprise retailers. Earlier, as the first hire and Lead Frontend Engineer at an e-commerce startup, I helped grow the product from prototype to acquisition with multiple offers, including Roku. I enjoy working where engineering meets product—turning complex problems into elegant, impactful systems.

Lately, I’ve focused on integrating LLM APIs (OpenAI, Anthropic, Gemini, Mistral, Perplexity), designing structured prompts, and building cost-efficient, distributed AI workflows in Elixir. I approach architecture with a product mindset, emphasizing reliability, observability, and scalable solutions. I’m energized by mentoring teammates, shaping engineering culture, and delivering outcomes that matter to the business.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Fluent

Work Experience

Co-founder & Lead AI Developer at NextGem

October 1, 2024 - November 1, 2025

Built AI and automation tools for blue-chip retailers, focusing on large-scale data workflows and real-time agentic systems in Elixir. Designed distributed AI features, from prompt design to production observability, and implemented production-grade AI pipelines with model switching, context trimming, caching, and batching. Built fully distributed workflows using GenServer and Task.Supervisor with timeouts, retry logic, and graceful fallbacks to ensure reliability under load. Introduced production observability with Sentry and structured logging.

Elixir Project Developer & Frontend Lead at Katalys

August 1, 2022 - September 1, 2024

Led Elixir backend development for a data-sync service unifying product information across multiple SaaS platforms. Implemented a joint-auth server (Next.js) providing single sign-on across products, improved reliability on AWS, and mentored frontend engineers. Collaborated on data enrichment and architectural alignment for scalable integrations.

First Hire & Lead Frontend Engineer

February 1, 2019 - August 1, 2022

Shaped the frontend experience for the core product, delivering a responsive checkout flow and a embeddable widget for publisher sites. Achieved significant conversion-rate improvements through UX and payments optimizations; owned product analytics and payments integration; mentored another developer and coordinated cross-functional work.

Full-Stack Developer at Self-employed

February 1, 2018 - February 1, 2019

Freelance full-stack work including an AR mobile app displaying real-time geographic labels and a gallery viewer for an insurance company with synchronized tab interactions.

Frontend Developer at 507 d.o.o.

November 1, 2016 - February 1, 2018

Ported a Vue.js web application to iOS via WebView and contributed to production-ready Vue applications for internal operations.

Co-founder & Frontend Developer at LoopN Roll

June 1, 2016 - August 1, 2017

Co-founded a startup delivering a platform for sharing GIFs, music, and text with creator monetization; built the responsive frontend and core interactions in-house, achieving early traction and revenue.