/ My Experience

Over 16 years of experience and 200+ projects

Get in touch

Skill set

  • Figma
  • Sketch
  • User Testing
  • Adobe Suite
  • Webflow
  • HTML&CSS

Top Brands

  • Coca-Cola
  • Brewdog
  • Nestle

Brands & companies I have collaborated with

LucidLinkCocaColaBrewDogTideTevaNestleTwitchBlizzardPaysafeBT
/ My RECENT Experience

My career journey

Open to Work
Nov 2025 → May 2026 Sofia (hybrid) Contract
WorkBoard AI
WorkBoard AI

Lead Product Designer

Leading end-to-end product design at WorkBoard, owning strategy and vision for complex workflows that help teams align and achieve outcomes. Partnering with product, engineering, and leadership to deliver high-quality experiences through research, high-fidelity prototypes, and system components. Managing and mentoring designers while driving a strong design culture across the organization.

Nov 2023 → Oct 2025 Sofia, Bulgaria (remote) Full Time
arkieva
arkieva

User Experience Manager

Managing all UI and UX for Arkieva's SaaS platform, with a focus on usability and efficiency. Leading a full redesign to deliver a modern, intuitive interface. Collaborating with leadership and developers to ensure design decisions meet both user needs and business goals. The result is a streamlined product experience that supports smarter workflows and greater adoption.

May 2022 → Nov 2023 Contract

Senior Product Designer

LucidLink
LucidLink
Dragonlabz
Dragonlabz
Chaiz
Chaiz
GeeGee
GeeGee

Collaborated with multiple startups and scale-ups including LucidLink, Dragonlabz, Chaiz, and GeeGee, leading end-to-end product design initiatives. My work spanned creating high-fidelity prototypes, intuitive interfaces, and visually engaging experiences while conducting user research and testing to align products with business and user needs. I partnered closely with product and engineering teams to iterate on solutions, guided design enhancements to support product growth, and mentored junior designers to foster a strong design culture.

See all experiences
/ My Experience

Past education & credentials

Nielsen Norman Group / SEP 2022

Design Systems and Pattern Libraries

This course teaches how to create, manage, communicate, and govern component libraries for maximum success.

Nielsen Norman Group / MAR 2022

Being a UX Leader

This course focuses on essential leadership skills that all UX professionals must master. Getting hands-on practice and helping me create buy-in for UX and bringing my team's vision to life.

Nielsen Norman Group / 2019

Omnichannel Journeys and Customer Experience

This course focused on diagnosing common pain points in customer journeys. Discussing guidelines for creating a usable experience across many channels to create personalized experiences that are consistent, seamless, optimized for the context of each device.

Telerik Academy / 2013

UI/UX Design

The lectures I attended at Telerik Academy taught best practices regarding Graphic, Information Architecture (IA), & Interaction design, as well as Lean UX. I also participated in a number of workshops to utilize the freshly-learned skills.

/ My tools

Discover what tools I use for work

Interested in working together?
Sofia, Bulgaria
LinkedIn

© 2026 Martin Castellow