Helping Startups, SaaS in 🇺🇸 USA & 🇪🇺 Europe Scale Fast
Engineering High-Performance UI/UX, Website, Mobile App & SaaS That Never Fail
We ship senior-level UI/UX and Next.js code in weeks, not months. Helping US & EU startups hit MVP faster.
UI/UX Design & Frontend Development
Website Design & Development
Branding & Website Development
Product Design & Development
Corporate Website Development
Web Platform Development
UI/UX Design & Web DevelopmentMost
Startups
&
SaaS
fail
on
flow,
not
features.
A
clunky
interface
is
a
tax
on
your
growth.
It
leads
to
churn
and
users
who
leave
before
seeing
your
product’s
true
power.
Devionex
builds
high-velocity
experiences,
turning
complex
workflows
into
intuitive
products
that
scale.
Don't
just
design
screens,
ship
value.
Our Featured Client Wins
Secured €4.5M Series A Funding for Atmantara post-launch
Sub-500ms Page Loads for Casso Wealth
Secured 40% Increase in Risk Analyst Efficiency
Design & Development Services We Offer
From Figma to production-ready code. We deliver high-fidelity UI/UX and scalable architecture built to grow with your users.
Development
Available For Call Now
We’ve helped improve and scale 120+ products to market success.
From startups to scaleups, our clients have seen real results. Explore a selection of our work across industries and product types.
Fintech & AI Infrastructure
Atmantara — Powering a €4.5M Series A through Institutional AI Infrastructure.
Atmantara
Results
- Secured €4.5M Series A Funding (Post-Launch)
- 40% Increase in Risk Analyst Efficiency
- 98 Lighthouse Performance & Core Web Vitals
- Passed BaFin & GDPR Regulatory UI Audits
Casso Wealth
Results
- 99th Percentile Performance (Sub-500ms Page Loads)
- 25% Increase in Mobile Conversion Rates
- Institutional-Grade Security & Trust Positioning
- Zero-Technical Debt Scalable Architecture
Strategy & Lead Gen
Residenzo — High-Conversion Luxury Real Estate Platform.
Epicurean
Results
- 35% Reduction in Lead-Gen Friction
- Multi-Device Performance Optimized
- Scalable Global Design System
Strategy & Lead Gen
Appie — Conversion-First Delivery Experience.
Appie
Results
- 22% Increase in App Installs
- 35% Reduction in Bounce Rate
- Sensory-Driven UI Strategy
Why Us
Engineering for those who move fast
We eliminate the friction between your vision and a live product.
24-Hour Kickoff
We hate long onboarding meetings as much as you do. We'll jump into your Slack and Linear in under 24 hours so we can stop talking and start building on day one.
Clean, Scalable Code
We build with your exit in mind. No messy shortcuts or technical debt—just solid, audit-ready code that makes your investors happy during due diligence.
Talk Directly to Pros
Forget the Project Manager game. You get a direct line to the senior architects actually writing your code. No middleman, no 'lost in translation' errors.
The Sleep Better Guarantee
Try us for a week. If you don't feel like we're the perfect fit or if our velocity isn't what you expected, you don't pay. It’s that simple. No hard feelings.
Ready to scale?
Your dedicated senior product architect is just one call away.
What Our Clients Say About Us
I'm impressed by DevioNex's commitment and proactiveness to make the project great.
Maximilien L. Poame
CEO, @entlastet
What impressed me most was their unique blend of technical excellence and proactive communication.
Artyom Yeprikyan
Executive, ROY
They were always diligent in delivering things quickly and ahead of schedule.
Jonathan Mandell
CEO/Founder of Docubark
This guy's coding expertise and design development, will take your idea from scratch to a beautifully built, functional solution that exceed expectations.
Zenel Valerino
The only development team i choose to work with because very experienced
Keene Naaron
Have questions?Serious Founders.
Transparency is our baseline. From our Risk-Free Pilot to Series A-D technical audits, here is how we protect your equity and accelerate your growth.
Eliminate technical debt today.
Get a high-level roadmap and architectural review—free.
We eliminate onboarding lag by integrating directly into your Slack and Linear workflow within 24 hours. Our senior product architects focus on shipping high-fidelity features every week, skipping the overhead of traditional agency models.
Our Risk-Free Pilot allows you to test our engineering velocity before committing. If you aren't 100% satisfied with the code and design delivered in the first week, you walk away with zero financial obligation. We take the risk, not you.
Yes. We build for your next exit. Every line of code is written to pass institutional technical audits, ensuring your codebase remains a scalable asset that investors trust during your next funding round.
A senior US/EU developer costs $150k+ plus benefits. DevioNex gives you immediate access to a senior product architect for a fraction of the cost, offering the flexibility to scale up or pause your roadmap instantly without the hiring friction.
Absolutely. We provide zero middleman friction. You work directly with the senior experts building your product, eliminating the communication gaps and 'handoff' errors common in agencies with junior project managers.
We selectively enter hybrid equity partnerships with high-growth startups. If you have a proven track record and a product ready to dominate its niche, we are open to discussing performance-based equity models.
Ready to evolve your product?
Stop burning runway on technical debt. Let’s audit your roadmap and unlock your next growth phase through retention-first engineering