# Ruslan Alekseyev

> Senior Full Stack Developer & Engineering Manager with 13+ years of experience building AI-powered, scalable applications. Based in Barcelona, Spain.

## Key Expertise

- **AI/ML Integration**: Production-ready AI systems using OpenAI API, Claude API, RAG Systems, LangChain, and Vector Databases
- **Technical Leadership**: Engineering management, team scaling, architecture design, and mentoring distributed teams
- **Full-Stack Development**: Node.js, TypeScript, React, Next.js, PostgreSQL, MongoDB, AWS, GCP, Kubernetes

## Services Offered

- **AI/ML Integration Architecture**: Designing and implementing production-ready AI solutions including chatbots, document processing, and intelligent automation
- **Fractional CTO / Technical Leadership**: Part-time technical guidance for startups and growing companies needing senior technical expertise
- **Full-Stack Development**: End-to-end application development with modern tech stacks (Node.js, React, Next.js)

## Pages

- [About](https://ruslan-alekseyev.tech/about): Career timeline, technical skills, and background information
- [Services](https://ruslan-alekseyev.tech/services): Detailed service offerings with engagement models (hourly, retainer, project-based)
- [Portfolio](https://ruslan-alekseyev.tech/portfolio): Case studies including Aspect Health, PayAggregator, and enterprise projects
- [Blog](https://ruslan-alekseyev.tech/blog): Technical articles on AI integration, team leadership, and software architecture
- [Contact](https://ruslan-alekseyev.tech/contact): Direct contact information and scheduling

## Featured Projects

- [Aspect Health Platform](https://ruslan-alekseyev.tech/portfolio): AI-powered healthcare platform - Engineering Manager role (2024-Present)
- [PayAggregator](https://ruslan-alekseyev.tech/portfolio): Payment processing system with ML-based fraud detection (2022-2024)
- [BuySellVouchers](https://ruslan-alekseyev.tech/portfolio): P2P voucher marketplace platform (2020-2022)

## Technical Skills

- **Languages & Frameworks**: JavaScript, TypeScript, Node.js, React, Next.js, Express, NestJS
- **Databases**: PostgreSQL, MongoDB, Redis, MySQL, Elasticsearch
- **Cloud & DevOps**: AWS, GCP, Docker, Kubernetes, Terraform, GitHub Actions
- **AI/ML Tools**: OpenAI API, Claude API, LangChain, Vector Databases, Prompt Engineering

## Contact

- **Email**: ruslan.alekseyev@gmail.com
- **LinkedIn**: https://www.linkedin.com/in/full-stack-team-lead
- **GitHub**: https://github.com/ruslanaleks
- **Location**: Barcelona, Spain (GMT+1)
- **Availability**: Open to consulting and fractional CTO engagements