Valentin K.

I build complete IoT and infrastructure systems — from embedded devices and network equipment to cloud backends and web dashboards. Over 11 years of remote work and 13,000+ hours on Upwork, I've delivered end-to-end solutions where hardware, networking, and cloud need to work together seamlessly. My strongest side is backend and infrastructure — I'm comfortable with frontend (Vue.js) but I thrive designing cloud architectures, APIs, and deployment pipelines. Key projects: - Smart building Wi-Fi platform — centralized management of hundreds of MikroTik routers across multiple sites. Auto-provisioning, mesh configuration, monitoring dashboards, usage analytics. Stack: MikroTik RouterOS v6/v7, Python, VueJS, AWS, Terraform. - IoT heating control system — smart thermostats running a Yocto Project-built embedded Linux with Mender OTA updates, LoRaWAN connectivity via ChirpStack, and an AWS cloud backend for monitoring and control. Stack: Yocto, Mender, ChirpStack, LoRaWAN, AWS, Python, VueJS. - Self-hosted OTA update platform — built a scalable, fault-tolerant OTA infrastructure on AWS ECS using open-source Mender, replacing the vendor's paid hosted offering. Stack: AWS ECS/ECR, Terraform, Mender, MongoDB Atlas. Core stack: AWS (IoT Core, Lambda, DynamoDB, CloudFormation, S3), Python/FastAPI, JavaScript/TypeScript, VueJS 2 & 3, Terraform, Embedded Linux (Yocto), Mender, LoRaWAN/ChirpStack, MikroTik (advanced), Bash, Linux. I actively use AI-assisted development workflows (Claude Code, GSD framework) to accelerate delivery and maintain quality at scale. I work best on projects that span multiple layers — if your system touches both devices and cloud, that's where I add the most value.