Viktor Vilskyi

Remote · Estonia

• Cloud software architecture (AWS, GCP, Runpod) and AI software engineering (Python, Node.js, JavaScript/Typescript)
• AI solutions, automation and integrations. Building AI workflows and AI agents (LLMs, RAG, Vector DBs, LangGraph, LangChain)
• Built an AI hiring platform that turns a job description into a timed interview with candidate questions. LangGraph pipeline with human in the loop review, LLM-as-judge verifier, pgvector semantic question bank, offline evals and Langfuse tracing; a tool-calling agent served over MCP
• Built an end-to-end AI platform for consistent, high-fidelity AI influencers across image, video, and audio, with custom Kafka powered AI workflows, trained LoRA models, and integrated third-party AI model APIs
• Took an AI bookkeeping product from scratch, with natural-language transaction management via an agentic layer, VLM receipt scanning, and voice entry through speech transcription. Supports 10 languages, real-time cross-device sync, multi-tenant security, and resilient infrastructure

Remote · Tel Aviv

• Scaled Live Sessions infra to support thousands of concurrent users, boosting distributed real-time platform reliability
• Engineered a custom RTDB load balancer across multiple Firebase instances, bypassing instance limits, cutting costs, and increasing throughput
• Built a dual-mode chat system leveraging Firebase RTDB for low-latency messaging and Twilio API for reliable carrier-grade fallback
• Optimized Firestore schema to eliminate duplication, significantly reducing read/write costs, sync issues and maximizing query efficiency
• Enhanced Pub/Sub and REST API data pipelines, resolving complex race conditions through deep architectural refactoring
• Implemented a Factory Pattern for e-commerce product catalog integrations
• Hardened security and managed full GCP DevOps
• Implemented PoC of AI influencers for live sessions

Hybrid · Tel Aviv

• Worked on the core team, then moved to the infrastructure team
• Maintained core platform services powering Rapid7 Threat Command, a real-time cybersecurity intelligence platform
• Supported cross-cloud infrastructure (GCP & AWS) using Terraform, Kubernetes container orchestration
• Built core microservices for security data parsing pipelines and authored shared libraries adopted across multiple engineering teams
• Designed greenfield CI/CD 2.0 pipelines via Jenkins and GitHub Actions, boosting deployment velocity and reliability through automated testing
• Hardened Docker container security fleet-wide
• Participated in architecture decisions for new flows and products, factoring in scalability, maintainability, and engineering best practices

Hybrid · Tel Aviv

• Led backend architecture for product matching, recommendation, and search services handling millions of e-commerce queries
• Developed core matching logic in Erlang, building a high-concurrency, fault-tolerant foundation for real-time discovery
• Integrated Elasticsearch and vector databases to power text-augmented search and image-similarity recommendations
• Engineered a high-throughput ingestion pipeline, leveraging AI image tagging, vector embeddings, Argo Workflows, and Apache Spark for million-row XML feeds
• Built a containerized local dev environment via Docker Compose, mentored engineers, and established comprehensive automated testing
• Built a Kubernetes, namespace-based environment for integration testing, enabling isolated, reproducible test runs
• 🏆 Awarded Best R&D Developer — Q1 2023 and recognized for outstanding achievements.

Hybrid · Holon

• Developed microservices for real-time face/body detection and recognition pipelines, collaborating with CV teams to deliver production systems. Integrated AI inference services
• Built a Node.js Camera Service API gateway integrating Kafka, gRPC, Consul, Redis, Socket.io, and PostgreSQL, backed by 400+ automated tests and Prometheus/Graphana metrics
• Engineered a Pipeline Manager using gRPC and Redis/Consul to process live streams, stress-tested to 500 pipes and 5,000 concurrent video streams
• Built a dynamic GPU load balancer that redistributed video streams across pipes based on moving average load, reliability scores
• Authored shared gRPC and Consul client libraries featuring round-robin load balancing, distributed via JFrog with full regression test coverage

Office · Herzliya

• Led a 3-person engineering team managing sprints, tech priorities, and performance while remaining hands-on across the full stack
• Designed a white-label CRM platform for financial institutions, featuring a highly configurable, WiX-like interface adaptable across verticals
• Built a C++ connector using Sockets and MT4/MT5 libraries to handle real-time trading deposits, orders, and account states
• Implemented OAuth 2.0/SSO and secure payment gateways, deploying on AWS EC2 with WAF, CloudFront CDN, and IP-based security
• Designed a seamless flow for payment provider integrations, abstracting provider-specific logic to enable fast onboarding of new payment methods with minimal code changes

Office · Kyiv

• Founded and operated a software startup, managing a small team and overseeing end-to-end product and business delivery.
• Led full-stack engineering for client projects, driving the entire lifecycle from architecture and implementation to deployment.
• Executed SEO strategies for websites and e-commerce stores, significantly improving organic visibility and search rankings.

Office · Kyiv

• Led a cross-functional team of software engineers and SEO specialists to deliver high-performing digital products.
• Developed websites and e-commerce stores, driving client-facing projects through the full software lifecycle.
• Specialized in advanced SEO, optimizing web properties to boost search engine rankings and accelerate organic traffic growth.