Siim Mardus
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CV

Siim Mardus

Founder & senior software engineer — full-stack product development, platform work, and development project delivery.

Summary

Software developer focused on building reliable products and clear user experiences. I combine pragmatic engineering with strong communication — from banking platform work at Glia to co-founding Skipster and running Kopka Tech for Estonian SMBs. Comfortable across the stack, with depth in TypeScript, React, Ruby, Elixir, and realtime systems.

Education

  • University of Tartu

    BSc Computer Science

    2017 — 2022

    Tartu, Estonia

Skills

Frontend

  • React
  • TypeScript
  • Next.js
  • JavaScript
  • Tailwind
  • Framer Motion

Backend & platform

  • Node.js
  • Express
  • Ruby
  • Elixir
  • PostgreSQL
  • MongoDB
  • DynamoDB

Delivery & tooling

  • Turborepo
  • Docker
  • CI/CD
  • AWS
  • Google Cloud
  • Vitest
  • Playwright

Integrations & comms

  • WebRTC
  • WebSockets
  • Stripe
  • Twilio
  • OpenAI
  • Anthropic

Languages

  • EstonianNative
  • EnglishC1 — full professional proficiency

Experience

  • Kopka Tech

    Founder & Engineer

    Jan 2025 — Present

    • Studio helping Estonian SMBs with websites, custom software, integrations, and AI-assisted delivery.
    • Own sales, scoping, client communication, project planning, and hands-on engineering end to end.
    • Ship tailored solutions from landing pages to e-commerce, internal systems, and workflow software.
  • Skipster

    Co-founder & Engineer

    2024

    • Co-founded and built SaaS for food trucks and small restaurants.
    • Delivered order queues, kitchen screens, SMS notifications, and sales reporting.
    • Owned product, engineering, and go-to-market from day one.
  • Glia

    Senior Software Engineer

    Jul 2024 — Present

    • Senior full-stack engineer on AI-powered banking and customer engagement software.
    • Lead feature work end to end across a platform used by 700+ financial institutions.
    • Mentor engineers, drive technical decisions, and stay close to production delivery.
  • Glia

    Frontend Developer

    Oct 2022 — Jul 2024

    • Focused on frontend platform: design system, monorepo tooling, generators, pipelines, and component libraries.
    • Built frameworks and deployment infrastructure supporting product teams at scale.
    • Collaborated closely with product and design on user-facing platform quality.
  • Glia

    Full Stack Developer

    Apr 2019 — Oct 2022

    • Joined as an intern and grew into full-stack ownership across routing, queuing, and realtime media.
    • Built and maintained applications with JavaScript, TypeScript, React, Ruby, Elixir, and PostgreSQL.
    • Implemented REST APIs, automated testing, CI/CD, monitoring, and technical documentation.

  • Estonian Defence Forces

    Tech Lead

    Feb 2021 — Dec 2021

    • Led a small team building full-stack web applications with TypeScript, React, Java Spring, and PostgreSQL.
    • Designed and implemented authentication with Spring Security.
    • Planned work, mentored developers, and worked directly with product owners and clients.