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Ahmad S.

Ahmad S.

Senior Product Engineer | Full-Stack SaaS & AI Systems

I help founders and product teams turn complex SaaS and AI ideas into reliable, production-ready products. I work hands-on from discovery and architecture through UX, full-stack implementation, integrations, testing, observability, and launch. I am a senior product engineer, technical founder, and fractional CTO with 10+ years across product, platform, mobile, cloud, embedded, and AI work. I am strongest where product judgment and engineering depth need to live in the same person: zero-to-one builds, product rescue, platform architecture, agent workflows, and ambiguous work that still needs a dependable outcome. Selected work: • Founded and built Weavz, a governed app-access layer for AI agents, including hosted connections, API and MCP execution, scoped credentials, approval gates, triggers, state, files, sandboxing, audit, and TypeScript/Python SDKs. • Built across the Nuumi connected-device ecosystem: React Native, BLE-to-cloud synchronization, firmware integration, release systems, and an AI coach grounded in behavior and device data. • Led iOS and DevOps work on the endios no-code platform used by 100+ German utility and smart-city customers. • Architected Humaine's AI virtual-patient simulator, including dialogue and inference flows, authoring tools, voice, evaluation, and reporting. What I can own: • Zero-to-one SaaS and AI product delivery • Multi-tenant platforms, APIs, authentication, RBAC, webhooks, and integrations • LLM and agent systems: tool calling, orchestration, scoped execution, approvals, and auditability • React, Next.js, TypeScript, Node.js, Python, PostgreSQL, AWS/GCP, Docker, and CI/CD • React Native, mobile/cloud systems, BLE, firmware, and IoT • Product discovery, technical direction, code review, delivery systems, and mentoring Clients bring me in when they need someone who can talk to users and founders, make architectural decisions, and ship production software without losing product intent. Available for hands-on senior or staff product engineering, founding engineer, platform and AI architecture, and fractional CTO engagements.

🇩🇪Berlin, Germany$110/hr100% JSS5.00 (1)Since Nov 2018

Earnings and projects

MRR
$0

Last 6 months ÷ 6

World#164,673 / 412k
🇩🇪Country#1,264 / 3,842
Revenue, last 30 days
$0
Total earnings
$15k

Billed in all: $15k

World#164,673 / 412k
🇩🇪Country#1,264 / 3,842
Per project
$4.9k
Projects, last 6 months
0
World#209,850 / 412k
🇩🇪Country#1,761 / 3,842
Projects in all
3

Across 5 contracts

80% fixed20% hourly
World#304,140 / 412k
🇩🇪Country#2,922 / 3,842

Earnings, last 30 days

$14.8kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$14.4k$14.6k$14.8k$15.0kOct 8Oct 23Nov 7

Skills