My one rule
If it doesn’t make you money, save you money, or free up your time, I won’t build it.
I build AI systems that fill your pipeline, respond to leads in seconds, and replace the manual work that’s slowing you down. If you need a custom tool, I build those too.
I’ll show you exactly where you’re losing money.
1Scattered
Your CRM, inbox, phone and spreadsheets each hold a piece of the deal. Every manual handoff leaks a lead.
2Connected
Built around the CRM, email and phone tools you already use, so nothing new to learn.
3Live
Qualified calls land on your calendar without you chasing them.
Work
$44K
new revenue in 60 days, as reported by Fivenson Studios
3
projects from 1 repeat client
50+
property valuations a day, down from 3 to 4 by hand
I’ll show you exactly where you’re losing money.
What I Build
Whether you need a proven system to fill your pipeline or a custom tool built around your business, here’s how I can help.
Your leads respond in hours, not days. Your team stops prospecting manually. Your calendar fills with qualified appointments you didn’t have to chase. That’s what this system does. Fivenson Studios reports $44K in new revenue from its first 60 days.
You’re duct-taping 5 tools together and it still breaks every other week. You need one app that does exactly what your business needs, nothing more. Oliver at RevCap Lending needed a way to analyze property deals in seconds instead of hours, so I built him one. Now he runs 50+ valuations a day without touching a spreadsheet.
Why Javox
Here’s what nobody tells you about AI automation: most of it is over-engineered garbage built by developers who’ve never had to close a deal or run a sales team. If it doesn’t make you money, save you money, or free up your time, I won’t build it.
Fixed price
Before I start, you get the scope, the timeline and a fixed price in writing. No hourly billing, no surprise invoices.
1 to 3 weeks
Most systems go live in 1 to 3 weeks, with staging access while I build. No 6-month projects with no end in sight.
100%
100% Job Success and a 5.0 rating from 9 reviews on Upwork. Every review is public.
1 builder
No account managers and no handoffs. The person on the call is the person who builds your system.
I’ll show you exactly where you’re losing money.
About
Jeremy Kreutzer
Founder of Javox, AI automation engineer
I’m Jeremy. I build AI systems and apps for B2B teams: lead generation, speed-to-lead and custom tools that replace the manual work slowing you down.
I’m based near Stuttgart, Germany, and work with clients in the US and Europe. Outside client work I co-founded GutFix, an AI gut-health app with paying members, so I know what it takes to ship something and keep it running.
The Process
30-minute call. You tell me whether you need more leads, faster response times, or a custom tool, and I show you exactly where you’re losing money and what the system looks like for your situation. You walk away with a clear blueprint, whether or not we work together.
You get a clear scope, a timeline and a fixed price in writing. No hourly billing and no surprises. You know exactly what you’re getting before anything starts.
For lead gen systems, I plug into your existing CRM, email, and phone tools and build around them. For custom apps, I start from your workflow and build exactly what you need on Next.js, Python, n8n, and Claude AI. Either way, you get staging access as it comes together and most builds ship in under 2 weeks.
System goes live and I watch it like a hawk for the first two weeks. I tune the AI on your real data, fix what needs fixing, and stick around as you scale. Most clients keep me on because the systems keep getting better over time.
Reviews
“Before Jeremy’s system, I was spending 3-4 hours a day on prospecting and still not booking enough calls. Now I wake up to qualified appointments already on my calendar. It took prospecting completely off my plate, and it’s the most valuable investment I’ve made this year.”
CChrisFounder of Fivenson Studios
$44K
New revenue closed, as reported by Fivenson Studios
“Working with Jeremy was a game changer for our agency. He built us a fully automated lead generation system that combines advanced scraping, LinkedIn enrichment, and AI-powered outreach, delivering a steady flow of qualified B2B leads. On top of that, he set up a speed-to-lead response system that engages prospects within minutes… working with Jeremy isn’t like hiring just another freelancer; it’s like partnering with someone who has a true business mindset.”
“I had a 10/10 experience working with Jeremy. He got my email sending infrastructure setup quickly for my campaigns and also created SOPs that I could hand off to my Sales Development Rep, which was great. He’s responsive, knows his stuff and very easy to work with. Would highly recommend.”
“Working with Jeremy was absolutely exceptional. He took a very complex, multi-platform social media automation project and made it feel straightforward and manageable… I highly recommend Jeremy to anyone looking for a top-tier automation expert and true strategic partner. I will absolutely work with him again.”
“Working with Jeremy was outstanding from start to finish. His expertise in building automated speed-to-lead systems and connecting all the moving parts (email, forms, CRM, AI replies) was obvious from day one… The end result is a clean, well-thought-out setup that genuinely improves our sales process.”
“He treated the project like it was his own. Great communication, strong skills, and real perseverance… If you want someone who works as a true partner, he’s the right choice. Highly recommended.”
“Jeremy is one of the best contractors I’ve ever worked with on Upwork; he is a true professional. High skill level, goes above and beyond to deliver value, and communicates extremely well. Would highly recommend.”
“Loved working with Jeremy, always on or ahead of time! High quality and great directions.”
FAQ
Most systems are live within 1–3 weeks. Complex SaaS builds can take longer, but I’ll give you a clear timeline on our call. I don’t do 6-month projects with no end in sight.
I’ve built systems for agencies, e-commerce brands, real estate teams, lending companies, and SaaS founders. If your business needs leads, automation, or a custom application, we should talk.
Most projects start at $2,500. Custom apps cost more, depending on scope. After the free audit you get a fixed price in writing, so you know the full cost before anything starts.
I don’t hand you a login and disappear. Every system comes with monitoring and support, and most clients keep me on because once you see what’s possible, you want to automate the next thing too.
Those tools are great for simple automations. But when you need AI that actually thinks, custom logic that handles edge cases, and infrastructure that scales, you need something purpose-built. That’s what I do.
Let's talk
30 minutes, on me. Tell me where you’re stuck: leads, slow response times, or a custom tool. I’ll pinpoint exactly where revenue is leaking and what to build to stop it.
Book a Free 30-Min Audit →I’ll show you exactly where you’re losing money.
Projects typically start at $2,500. You get a fixed price in writing before anything starts.
No pitch decks, no 47-slide proposals, just a builder who finds the 20% that drives 80% of your results.