Independent software practice · Switzerland
K-I-Soft builds AI-discoverable websites, custom SaaS, and back-office automation, plus AWS Health Checks for teams already on the cloud. All by default, senior-led, no agency overhead. Founded and led by Istvan Kappelmayer, 30+ years in software.
Available for new engagements, remote or on-site across Switzerland
From a two-week AWS health check to a fully managed back-office. Start with the smallest commitment, scale as we earn it. All built by design, so they stay fast and cheap to run for years.
A two-week audit of your AWS setup against the Well-Architected pillars: cost, security, reliability, performance. You get a written report with prioritized findings, quick wins, and a 90-day roadmap. Often pays for itself in the first month from cost savings alone.
I build, host, and continuously optimize your website to be found, in Google search and across AI engines like ChatGPT, Claude, Perplexity, and Gemini. You see how each one interacts with it through monthly reports and a live dashboard you can check anytime. I do not promise specific rankings or citations. Nobody honestly can. I promise visibility, transparency, and ongoing work.
A custom SaaS foundation, fixed price, fixed timeline. Login, billing, multi-tenant data, customer portal, mobile-ready, observability, CI/CD. Six months of plumbing, done in eight weeks, ready for your first paying customer. Built on AWS so you start with no idle costs.
Routine business work, automated and operated by us. Document intake, offer generation, customer support triage, internal knowledge bases. We design it, build it, and run it for you on a monthly retainer. Not a tool you have to figure out, an outcome that just happens.
Not sure which fits?
Book a 30-minute call. Or start with the AWS Health Check, the lowest-risk way in: two weeks, fixed price, every artifact yours to keep.
Live · since November 2025
A FADP-compliant Swiss cybersecurity SaaS, designed and shipped end-to-end by K-I-Soft. Live in AWS Zurich since November 2025. Five months in production, zero auth-session bugs.
scmc.ch →Live · 2026
A senior-friendly site for local IT service in Bern and surroundings. Designed, built, and shipped by K-I-Soft. Computer help, Digital Signage, and device maintenance. Also K-I-Soft's go-to partner for hands-on local IT.
tec-support.ch →Archived · shipped 2024
A neighborhood rental marketplace shipped end-to-end in 2024: iOS and Android apps, AWS serverless backend, Apple Pay and Google Pay. Technically complete, no users. The cold-start lesson is on the blog.
Read the lesson →The tools and AWS services I use to design, build, and ship. Battle-tested in production, picked for longevity not hype.
AWS & Infrastructure
Backend
Frontend
Delivery & AI
I've been writing software for over 30 years, from early enterprise systems to modern serverless SaaS on AWS. Four countries, dozens of projects, one constant: I build the things I design. Not a consultant who talks about architecture. An architect who ships it.
Most recently, I built SCMC.ch end-to-end, a production Swiss SaaS platform running in AWS eu-central-2 since November 2025. AWS infrastructure as code, Lambda backend (Quarkus Native on GraalVM), DynamoDB, Cognito, Vue 3 frontend, GitHub Actions delivery. It's live, it works, and it's proof of what K-I-Soft can deliver on AWS.
I work independently through K-I-Soft. I take on a limited number of engagements at a time, because I don't do half measures. No large teams, no account managers, no handoffs. You work directly with me. Fluent in German and English.
No large teams, no account managers, no handoffs. You work directly with me.
30 minutes. You tell me what you're building or where you're stuck. I tell you honestly if I can help.
A clear, written scope of work. Fixed deliverables, timeline, and price. No surprises.
I design, build, and review, depending on the engagement. Weekly updates. Direct Threema, Teams, or Slack access.
Clean documentation, knowledge transfer to your team. You own everything. No lock-in.
For retainer offers. We keep it operating: monthly improvements, on-call response, observability. You stop maintaining it, we do.
If yours isn't here, just ask on the call.
Day rates between CHF 1'200 and CHF 1'600 depending on scope and engagement length. Fixed-price sprints from CHF 12'000 for 2-week deliveries up to CHF 35'000 for 6-week builds. Monthly retainer from CHF 6'000 for ongoing architecture support. Exact quote after the discovery call.
Yes. I take on subcontracts for AWS partner consultancies that need a senior architect on a specific mandate. K-I-Soft invoices your company; your client never sees the hand-off. I've worked this model before.
Switzerland, focus on DACH. Personal collaboration matters to me, so regular on-site exchange and a direct view of the running project are part of how I work. Remote where the project allows.
SCMC.ch is live and publicly accessible, my most recent end-to-end build. Full career history is on my LinkedIn profile. Happy to discuss specifics on a call.
German and English, fluently, both written and verbal. I've worked with teams across Switzerland, Germany, the US, and Hungary.
Yes, Claude and GitHub Copilot in daily work. But I review, understand, and own every line. 30 years of engineering instinct is what catches the mistakes AI still makes. That's what you're paying for, not the typing.
I take on a limited number of engagements at a time. If you have a project worth building, book a 30-minute call and I'll tell you honestly if I can help.
info@k-i-soft.ch · +41 77 955 55 73 · LinkedIn
I respond within 24 hours on business days.