Selected work for EverAI · Arne Feike

I design AI
that feels personal.

I’m a product designer with 15+ years of design experience. With Nyx / Nadir, I’m designing and building a personal AI companion — shaping conversation, personality, memory and onboarding in a working product.

Explore Nyx / Nadir View my CV

Based: Murcia, ES
Remote: Europe
Focus: UX · UI · AI · PO
Status: Open

Selected work

Companion UX · Consumer products · Research with impact

Nyx / Nadir — AI companionship

An AI companion I designed and built: character, conversation, memory and the tools to create more — with product boundaries that make it trustworthy.

Client: Own product
Year: 2026
Role: Design · PO · Build

REWE Product Testing

Relaunching a platform limited to one product test at a time, with parallel campaigns, simpler participation and reviews that reach the store shelf.

Client: REWE
Year: 2020–2022
Role: Product · UX · UI · Research

Prosumer App

White-label app for dynamic energy tariffs and home energy management — now rolling out to 20+ utilities.

Client: Vattenfall
Year: 2024
Role: Product · UX · UI · PO

NFDI4Health Studyhub

Platform for FAIR clinical and public-health study data — redesigned flows cut form abandonment by 80%.

Client: NFDI4Health
Year: 2022
Role: Research · UX · UI

Brother Myze

Cloud platform for on-demand print and fulfillment.

Client: Brother
Year: 2023
Role: Product · UX · UI

MSAID Platform

All-in-one solution for proteomics data analysis.

Client: MSAID
Year: 2021
Role: Product · UX · UI

AI tools, in practice.

I use AI across the work: exploring images, building software, testing voices and connecting creative tools. When an existing workflow falls short, I build the missing part.

Character productionComfyUI · Mage.Space · Pose Studio · Figma: I usually create companion master images in ComfyUI or Mage.Space, then take them through my Pose Studio pipeline for expression sets, review and complete Companion packages, with visual cleanup in Figma.
Image & video explorationMage.Space · Higgsfield: Exploring visual directions and comparing what different image and video models produce.
AI coding environmentsWindsurf · Codex · OpenCode: Working across AI coding environments for implementation and review, from focused changes to building my own tools.
Language & local modelsClaude · GPT · Gemini · Ollama: AI-assisted implementation and review; local experimentation with Gemma, Qwen and other open models.
Multi-model providersOpenRouter · Venice · Featherless · Hypereal: Hands-on experience using multiple models through different providers and integrating their APIs into my own projects.
Voice & conversationFish Audio · ElevenLabs · Cartesia · Gemini API: Text-to-speech experiments and speech-to-speech interaction through the Gemini API.
Connected creative toolsMCP · Figma · Blender · Godot: Working with MCP servers to bring AI assistance into design, 3D and interactive authoring tools.

See how I built Pose Studio →

What others say

From internal skill reviews and peer feedback at Beyonder

As a designer he often lays out clear forks in the road, so a decision actually gets made.Colleague · Beyonder
Everything he has done in the MSAID project — incredible designs which made the customer spend a lot more money on the project than initially planned.Colleague · Beyonder
Arne communicates on eye level, even in stressful situations.Colleague · Beyonder
In refinements he asks the questions that actually clarify the requirement.Colleague · Beyonder
He's well connected and knows who can help where.Colleague · Beyonder
One of the most important people when it comes to improving and evolving our processes.Colleague · Beyonder

As a designer he often lays out clear forks in the road, so a decision actually gets made.Colleague · Beyonder
Everything he has done in the MSAID project — incredible designs which made the customer spend a lot more money on the project than initially planned.Colleague · Beyonder
Arne communicates on eye level, even in stressful situations.Colleague · Beyonder
In refinements he asks the questions that actually clarify the requirement.Colleague · Beyonder
He's well connected and knows who can help where.Colleague · Beyonder
One of the most important people when it comes to improving and evolving our processes.Colleague · Beyonder

When Arne takes on a project, I have full confidence he'll lead it through to a great result.Colleague · Beyonder
The ability to prioritize and structure our work — Arne was able to find many great solutions to the various structural and logical problems.Colleague · Beyonder
In the weeklies he passes on what matters from the dev team — at the right length and the right level of detail.Colleague · Beyonder
Your way of working with customers is exemplary.Colleague · Beyonder
His humour defuses tense calls and carries them through.Colleague · Beyonder
His tickets were always well written — and he actively asked the team for feedback on them.Colleague · Beyonder

When Arne takes on a project, I have full confidence he'll lead it through to a great result.Colleague · Beyonder
The ability to prioritize and structure our work — Arne was able to find many great solutions to the various structural and logical problems.Colleague · Beyonder
In the weeklies he passes on what matters from the dev team — at the right length and the right level of detail.Colleague · Beyonder
Your way of working with customers is exemplary.Colleague · Beyonder
His humour defuses tense calls and carries them through.Colleague · Beyonder
His tickets were always well written — and he actively asked the team for feedback on them.Colleague · Beyonder

He explains the features in the current sprint to stakeholders with real technical depth.Colleague · Beyonder
In team discussions Arne makes a point of seeing and hearing every perspective. He tends to take the mediating role.Colleague · Beyonder
I like the insights you give us into the design work, and that we can work with your inputs and thoughts on a daily basis.Colleague · Beyonder
In countless concept sprints and user interviews he brought clarity into the requirements.Colleague · Beyonder
You showcase work in progress as soon as possible and value every opinion.Colleague · Beyonder
Arne is clearly regarded as the expert in UX — the person you go to and ask.Colleague · Beyonder
You're doing this really well!Colleague · Beyonder

He explains the features in the current sprint to stakeholders with real technical depth.Colleague · Beyonder
In team discussions Arne makes a point of seeing and hearing every perspective. He tends to take the mediating role.Colleague · Beyonder
I like the insights you give us into the design work, and that we can work with your inputs and thoughts on a daily basis.Colleague · Beyonder
In countless concept sprints and user interviews he brought clarity into the requirements.Colleague · Beyonder
You showcase work in progress as soon as possible and value every opinion.Colleague · Beyonder
Arne is clearly regarded as the expert in UX — the person you go to and ask.Colleague · Beyonder
You're doing this really well!Colleague · Beyonder

About

I lead design at Beyonder, where I built the design function from the ground up. I work hands-on with product managers and engineers, from discovery to the details of a working interface.

My projects span consumer energy apps, research platforms and specialist B2B tools. Nyx / Nadir brings that experience into AI companionship: an independent product where I own the design direction, specifications and AI-assisted implementation.

Based in Murcia, Spain. Fluent in English, working across European time zones.

Certifications: CSPO, UX Professional
Languages: German (native), English (fluent)
Location: Spain (EU)

Full CV — roles, reviews, education

I design AIthat feels personal.