Hire a Senior Developer & AI Expert

Bringing unparalleled web development, systems programming, and AI innovation to companies of every size.

From startups to enterprises, I deliver revenue-focused solutions that combine deep technical expertise with cutting-edge AI capabilities. My approach goes beyond code – I architect systems that drive business growth and create measurable impact.

28+
Years Experience
5.0
Client Rating
500+
Clients Served
Full-Stack DevelopmentAI IntegrationSystems ArchitectureTechnical Leadership
Mark Tellez - Senior Developer & AI Expert

Technical Leadership

With 26+ years of hands-on experience in web and systems programming, I provide architecture design and implementation tailored for modern business needs. Unlike typical developers, I focus on revenue-driven decision-making, ensuring code quality and technical strategies that accelerate business growth while delivering results on time.

AI Expertise

I specialize in cutting-edge AI solutions, including AI-powered automation, LLM implementation, and custom AI model development. My AI innovations have fooled professionals, won awards, and placed in top-tier competitions. Whether integrating AI into existing systems or developing models from scratch, I ensure businesses get AI solutions that actually work.

Core Technologies

  • JavaScript/TypeScript
  • React & Next.js
  • Node.js
  • Python for AI/ML

Previous Clients

  • PayPal
  • Intel
  • GEICO
  • VoxBird.ai (Current)

Key Achievements

Award-Winning AI Innovations

Developed an award-winning text-to-speech model that fooled BossLade (Snoop Dogg's wife) by generating audio indistinguishable from the real thing.

Global AI Agent Contest

Placed 8th worldwide out of 5,000+ participants in an AI agent contest, building a Harry Potter-style battle agent using a small neural network and a genetic algorithm.

Zooly AI Integration

Developed an AI-powered agent for Zooly, capable of using tools, retrieving company data via RAG, and replacing traditional form-heavy UIs with natural language interactions.

How I Work With Clients

1

Initial Consultation

Meet virtually with the client to understand requirements and wishlist.

2

Research & Planning

Perform deep technical research and project planning.

3

Client Review

Present the plan to ensure alignment before execution.

4

Development Begins

Execute work in iterative cycles with weekly updates.

5

Weekly Progress Reviews

Demo progress to maintain client alignment.

6

Refinement & Testing

Fine-tune, optimize, and validate final results.

7

Final Deliverables

Work is released progressively upon each payment.

Frequently Asked Questions

What industries do you work with?

I work with a wide range of industries, including SaaS, AI startups, enterprise tech, and automation-heavy businesses.

Do you only work with AI projects?

No, I also specialize in full-stack development, systems programming, and web applications.

How long does a typical project take?

It depends on scope, but I prioritize speed and efficiency while maintaining quality. Expect initial results within weeks, not months.