Marian S.

I build web apps that businesses run on. SaaS products, internal tools, client portals and dashboards, with AI built in where it actually pays off. Built to last, from the first version to scale. I've been fractional CTO and lead software engineer for a private aviation company (2022-2026), and since 2026 for a US marketplace. I'm also the technical partner to a Shopify Plus brand that has passed $10M in sales. And I built my own SaaS, SelfManager.ai: 400k+ lines of code, 14 AI features, an API, webhooks and an MCP server, with paying users. What I build: - SaaS web apps, from MVP to scale - Custom web apps for your business: internal tools, portals, dashboards - Rescue and modernization of apps that became hard to change - Code and security audits before you launch, raise, sell or rebuild Most apps I build now have AI inside. Some of what I add: - AI agents that do real work: research, update records, follow up, run workflows - Voice and audio: talk to your app, voice assistants, transcripts and call summaries - MCP servers, so Claude, ChatGPT and other AI assistants can work with your product - Documents and files: read PDFs, contracts, invoices and spreadsheets, and turn them into data - Images and video: analyze, tag, generate and edit at scale - Chat and search over your own data, with answers that cite the source - Automations that take hours of manual work off your team every week - APIs and webhooks, so your app connects with your CRM, payments, email and any other tool Built for production, not demos: the right model for each task (OpenAI, Claude, Gemini, Grok or open-source), predictable costs, tested outputs, and your data kept private. Need more than one developer? I can lead a team of 10-20 people while still doing the hands-on work myself. 15 years of software engineering. 250+ clients with 4.93/5 Trusted by US businesses since 2014. Projects from $2,000. Tell me what you're building. You'll get a reply within 24 hours.