Aleksei Tcelishchev

Built the restaurant's public web application on Astro with Svelte islands, deployed to Cloudflare Workers. Implemented multilingual support and integrated Playwright end-to-end testing and Microsoft Clarity analytics.

Led software development, SRE, and DevOps architecture for diverse client engagements, including real-time media, blockchain, and AI voice platforms. Consulted for 70+ global clients on cloud migrations and system integrations.

Rebuilt the venue's legacy site as a Vite + React application under a parity lock, with staged beta and gamma environments. Automated visual regression testing with Playwright and pixelmatch.

Standardized CI/CD pipelines and orchestrated migration of background data processing systems to modern scalable architectures. Engineered a high-performance ClickHouse analytics layer alongside AWS RDS and ECS.

Implemented AWS's reference workflow for producing audio-description tracks using Polly, Elemental MediaConvert, Lambda, and Step Functions. Validated the pipeline end-to-end against a 3-hour source video.

Automated deployment, monitoring, and troubleshooting of video streaming software on AWS and bare-metal K3s edge clusters. Built scalable, secure infrastructure for high-volume video delivery pipelines with Ceph and SeaweedFS.

Managed Google Cloud Platform and Firebase infrastructure, providing continuous DevOps maintenance and observability. Re-architected a backend-less Next.js MVP into a fully specified, E2E-tested engine with real-time clinical session features.

Reduced AI agent cold-start latencies by 45% through custom container layering and pre-warming. Designed a secure, VPC-isolated container execution environment for LLM-driven code execution, and built an orchestration engine on Hatchet with A2A messaging.

Architected and migrated legacy AWS deployments to a unified, Terraform-managed Docker and Kubernetes ecosystem with ArgoCD for GitOps. Reduced monthly cloud spend by 35% through rightsizing and auto-scaling policies.

Owned the infrastructure for a low-latency phone-agent loop using Twilio, Whisper, ElevenLabs, and FastAPI with WebSocket audio streaming. Operated LiveKit and Retell as the live transport layer.

Built the Data-Sleek Lab environment as Terraform-managed Proxmox infrastructure. Migrated large-scale WebApps and WordPress installations to virtualized environments.

Delivered outbound live calls to end clients over Retell + Twilio, and managed a distributed team to delivery commitments. Recovered CI/CD for dev builds and unblocked store submission after a crisis.

Managed and scaled cloud infrastructure for a rapidly evolving platform. Implemented zero-downtime CI/CD pipelines and optimized infrastructure bottlenecks.

Owned and optimized AWS infrastructure for high availability, managed Kubernetes clusters, and resolved production issues. Led Python backend work on FastAPI/Django with a focus on scalability and performance.

Led the migration from Heroku to AWS EKS with zero downtime and 10x scalability improvements. Built a high-availability ticketing platform handling spikes of thousands of concurrent users, and managed a cross-functional team.

Containerized AI services with Docker and fine-tuned NLP models on domain-specific data. Developed and deployed a robust AI pipeline integrating Hugging Face models, LangChain, OpenAI, and Anthropic for an enterprise chatbot framework.

Led cloud infrastructure and Web3 engineering for DcentraLab's flagship platforms, including TokensFarm and 2key Network. Maintained AWS EKS clusters with GitOps workflows and architected multi-chain smart contracts.

Authored deep-dive technical documentation for performance benchmarking and framework compatibility. Executed complex integration test cycles and managed SDK releases for React, Angular, Vue, and Ruby on Rails.

Migrated the entire platform infrastructure from AWS Elastic Beanstalk to Google Cloud (GKE) using Kubernetes. Engineered core architecture for internal social networking platforms using Neo4j for complex social graph mapping.

Built a high-performance backend for a desktop application suite using AWS Lambda, Cognito, and API Gateway. Integrated Elasticsearch for near real-time social data analytics.

Engineered a full-stack Node.js cryptocurrency cloud-mining application across 74+ hours with a 5.0/5 rating.

Built Ethereum smart contracts and Hyperledger Sawtooth Lake distributed ledger networks and production demos.

Engineered Ethereum DApp and blockchain-platform frontends across 180+ hours with a 5.0/5 rating.

Delivered 350+ hours of Ethereum smart-contract, ICO/DeFi tooling, and decentralized application architecture with a 5.0/5 rating.

Delivered 405+ hours as Senior Developer building and scaling a CodeIgniter/PHP startup platform with a 5.0/5 rating.

Developed AWS Lambda applications (71+ hours, 5.0/5) and contributed upstream to the Serverless Framework authentication module.

Worked 735+ hours as JavaScript/Node.js engineer on the Qbix social platform, including Authorize.net and Stripe financial modules and complex embedded UI.

Delivered 434+ hours of production LAMP-stack backend and web platform engineering with a 5.0/5 rating.

Built the full audio/video path for Digital Kickstart's webinar product, including Facebook Live and YouTube Live API integrations (402+ hours, 5.0/5).

Engineered WebRTC audio/video and screen sharing in an AngularJS and socket.io/Node.js single-page application (71+ hours, 5.0/5).

Performed CalDAV server installation, mail-stack integration, and Linux VPS administration.

Handled installation, configuration, and recovery of Parallels Business Automation Standard (PBAS) and Plesk control-plane deployments.

Provided Plesk PBAS configuration, hosting automation, and ongoing Linux server estate maintenance.

Built automated Git repository workflows and server deployment tooling across 138+ hours with a 5.0/5 rating.

Deployed and configured Django applications onto cPanel/Cloud Linux hosting infrastructure.

Built a suite of automation tools as Chrome, Safari, and Firefox extensions, orchestrated by Jenkins and Chef deployment pipelines. Architected the data layer using Redis and Elasticsearch for sub-second retrieval of complex user social graphs.

Contributed to the company's transformation to an LIR, managing large IPv4 pools during a major datacenter migration. Developed advanced detection services for identifying CMS footprints and malicious JScript usage.

Performed Linux VPS and Plesk/cPanel hosting estate administration and production troubleshooting.

Provided remote technical administration and troubleshooting for 4G high-speed wireless network devices and VOIP-integrated services across corporate clients.

Architected advanced VMware vSphere / ESX topologies backed by NFS and iSCSI shared storage, and handled rigorous system testing against clustered Oracle databases. Engineered performance load testing and debugging environments across complex UNIX systems.

Managed maintenance and troubleshooting for massive Virtuozzo VPS clusters and HSPc-PBAS billing systems. Engineered an enterprise-wide backup system managing over 2TB of nightly deltas.

Managed and maintained technical infrastructure for the ISP's regional network. Built an internal inventory accounting and document workflow system utilizing Lotus Notes Domino.

Provided elite Level-3 technical support at SWsoft / Parallels, acting as the primary global escalation point for critical infrastructure failures. Achieved Microsoft Certified Professional (MCP) certification.