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Alexander Volodarsky
Senior Backend Engineer / Backend Developer
Phone: [open contact info](look above in the "contact info" section)
Email : [open contact info](look above in the "contact info" section)
Professional Summary
Senior Backend Engineer with 13+ years of commercial experience in building scalable, high-load backend systems and microservice architectures. Strong expertise in Node.js (Nestjs), Java (Spring Boot), distributed systems, containerized environments, and orchestration with Kubernetes. Proven track record in asynchronous pipelines, complex business logic, and fault-tolerant systems.

Core Skills
• Backend: Node.js (NestJS, Express), Java (Spring Boot), PHP (Yii2), Python (Flask PyTorch,NumPy,Pandas)
• Frontend: React, Next.js, TypeScript, CSS, SCSS
• Databases: PostgreSQL, ClickHouse, MySQL, MongoDB, OpenSearch, Redis
• Messaging & Streaming: RabbitMQ, Apache Kafka
• Integration: Apache Camel, IBM Integration Bus
• DevOps & Infrastructure: Docker, Docker Compose, Kubernetes, Jenkins, Linux
• ORM & Tooling: Prisma, TypeORM, Kysely, Nx, RxJS
• Storage: Minio (Object Storage)
• AI/LLM : LangChain (chains, agents, tools, RAG pipelines)
• LlamaIndex (document indexing, vector search, retrieval pipelines)
• OpenAI API / embeddings, Ollama (local LLM deployment)
• Vector databases (OpenSearch, pgvector)

Professional Experience
Senior Backend Engineer — N-SIX (Remote)
March 2025 — Present
• Developing a B2B eCommerce platform and CRM system
• Designing backend architecture and microservices using NestJS
• Deploying and operating services in containerized environments with Docker and Kubernetes
• Working with Prisma, MongoDB, PostgreSQL, Redis, RabbitMQ
• Solving complex data-processing and integration challenges
Backend Developer — National Security and Defense Council of Ukraine
November 2019 — October 2024
• Developed microservices for large-scale web scraping and data aggregation
• Designed reliable data flow between distributed services
• Built asynchronous pipelines using RabbitMQ and Apache Kafka
• Integrated heterogeneous systems using Apache Camel and IBM Integration Bus
• Optimized data processing, transmission, and storage for high performance
Backend Developer — eHab
July 2016 — November 2019
• Developed corporate web applications
• Implemented backend services using Flask and Spring Boot
• Designed and optimized PostgreSQL and MongoDB databases
• Used Redis caching to improve performance under high load
Backend / Full-Stack Developer — uStudio
November 2014 — July 2016
• Built websites and online stores
• Developed backend functionality using Yii2 and Express
• Worked directly with clients to gather and implement requirements
• Optimized performance at database and application levels
Software Engineer — Aweb System
February 2012 — November 2014
• Provided technical support for a large number of websites
• Developed custom modules and extended existing functionality
• Worked with WordPress, Joomla, Yii, MySQL, JavaScript
• Performed migrations and performance optimizations
Education
Interregional Academy of Management
Faculty of Information Technologies
Department of Software and Automated Systems
About Me
Backend-focused engineer who enjoys solving complex technical challenges, building reliable and scalable systems, and continuously improving professional skills.