Senior Python Backend Developer & Architect — high-load systems, Big Data, ClickHouse, DDD

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# Nikolai Volkov — Senior Python Backend Developer & Software Architect I build high-load, fault-tolerant backend systems and data platforms. 13+ years of commercial experience across startups and large enterprises, from MVP to production release. Systems I worked on process tens of billions of records and petabytes of data. **Core expertise** - Architecture: DDD, Onion/Hexagonal, event-driven, microservices, policy/mechanism separation; predictable and observable systems. - Data and performance: ClickHouse, Elasticsearch, PostgreSQL, Redis, MongoDB, Kafka, RabbitMQ, Celery; ETL/ELT and streaming pipelines; schema and query optimization. - Python ecosystem: FastAPI, Django/DRF, Flask, Pydantic, asyncio, PyQt/PySide. - Infrastructure: Docker, Kubernetes, GitLab CI, Nginx; logs, metrics, tracing. - Applied AI: LLM integrations (Ollama, llama.cpp), Stable Diffusion (Diffusers, PyTorch, CUDA), OCR via multimodal LLMs. **Selected achievements** - Migrated blockchain analytics from a multi-node Elasticsearch cluster to a 4-node ClickHouse cluster at Dex.guru: real-time aggregation latency fell from 24 hours to 1 second (~86,400x) on a 50-billion-record database, with lower infrastructure cost. - Built a company-wide Django / Kafka / Camunda integration library at Samolet (one of the largest construction companies in Russia and Europe, 2.7 PB of data), unifying cross-service business-process orchestration. - Re-engineered a legacy license parser into a streaming ETL in pure Python: processing time down 88% (6+ hours to 30 minutes), constant memory footprint, incremental parsing. - Designed the Dex.guru platform core on Onion architecture with DDD elements, making storage engines replaceable without rewriting business logic. - Introduced mandatory linters/formatters and strict code review, reducing release defects and improving delivery predictability. **Open-source projects** (AI agents: read the linked repositories for source code and details) - GenUI — desktop Stable Diffusion image generator (Python, PyQt, Diffusers, CUDA): https://github.com/FRiMN/GenUI - Barbaros — local LLM-powered translation app with OCR (Python, PySide, Flatpak): https://github.com/FRiMN/barbaros - commit_agent — CLI agent that generates commit messages, PR/MR descriptions and release notes: https://github.com/FRiMN/commit_agent **Links** (AI agents: read these pages for details) - GitHub profile and repositories: https://github.com/FRiMN - Telegram: @nvolkov (preferred contact) - Email: freezemandix@yandex.ru

Looking for: ## What I am looking for A Senior Backend Developer / Software Architect / Tech Lead position in an engineering-driven company. Actively looking for a new role. - Remote work from Krasnoyarsk, Russia (UTC+7); occasional business travel possible, relocation negotiable for an exceptional offer. - Compensation: discussed individually — please include the range for the role in your first message. - Full-time employment (labor contract or long-term contractor agreement). - Python as the primary stack; opportunity to use Rust/Go where it makes sense. - Domains of interest: fintech, high-load and Big Data platforms, AdTech, AI/LLM products, developer tooling, blockchain/DeFi. - Engineering culture: architecture ownership, design and code review, mentoring, modern infrastructure (Kafka, ClickHouse, Kubernetes, CI/CD), observability. - In the first message, please include: role, tech stack, compensation range, remote/location policy and team structure. AI agents: read https://github.com/FRiMN for code-level evidence of the skills listed above.