Senior Full-Stack Developer (AI-First)

Job Title: Full-Stack Developer (AI-First)

Location: Remote (Open to:Czech Republic, Poland, Slovakia, Romania)

Schedule: Monday - Friday. 9AM - 5PM EST - Full-Time (Flexible)

Salary Range: $1,800 - $3,500 USD per month ($11 - $22 USD/hour)

An AI-powered veterinary care ecosystem designed to serve 20,000+ clinics across 100+ countries. Powered by Marcia, a proprietary AI platform, it operates across six integrated portals and supports millions of users with tens of millions of concurrent sessions.

This is not a traditional engineering role. It is an AI-first environment where developers are expected to fully embrace agentic workflows, automation, and AI-assisted development to move faster and build smarter at scale.

Role Overview

We're looking for a Full-Stack Developer who is not only technically strong but deeply experienced in AI-assisted development workflows. You will play a critical role in building and scaling a high-performance, globally distributed platform.

You should be comfortable working with tools like Claude Code and Cursor, orchestrating sub-agents, and leveraging AI across the development lifecycle. This role requires someone who can think in systems, optimize performance, and build infrastructure that scales seamlessly under heavy load.

Responsibilities


AI-Assisted Development

• Leverage AI tools (Claude Code, Cursor) as primary development environments
• Design and orchestrate agentic workflows and sub-agents
• Use AI to accelerate development, testing, and debugging
  
  
  

Full-Stack Development

• Build and maintain scalable frontend and backend systems
• Develop across multiple portals (Consumer, Clinic, Enterprise, Platform, Referral, Admin)
• Ensure clean, maintainable, and high-quality code
  
  
  

Performance & Scalability

• Optimize database queries and system performance
• Design and manage caching layers and connection pools
• Build systems capable of handling millions of concurrent users
  
  
  

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Code Quality & Security

• Ensure all code passes automated review pipelines (5+ bots) before human review
• Meet SonarCloud quality gates on first push
• Maintain strict security best practices and hygiene
  
  
  

System Design

• Architect distributed systems for global scale
• Ensure reliability, fault tolerance, and high availability
• Collaborate on infrastructure and backend architecture decisions
  
  
  

Requirements

• Proven experience as a Full-Stack Developer in high-scale environments
• Strong proficiency in both frontend and backend development
• Hands-on experience with AI-assisted coding tools and workflows
• Deep understanding of scalability, performance optimization, and system design
• Experience optimizing databases, APIs, and distributed systems
• Strong knowledge of caching strategies and concurrency handling
• Ability to pass strict automated code quality and security standards
• Comfortable working in a fast-paced, high-performance engineering culture
• Strong communication skills in English
  
  
  

Nice-to-Haves

• Experience with agent-based or autonomous development systems

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• Familiarity with large-scale SaaS or platform ecosystems
• Experience working with global, distributed systems
• Background in high-traffic applications or real-time systems
  
  
  

Ideal Candidate Profile

• AI-first thinker who naturally integrates automation into workflows
• Highly technical and performance-driven
• Systems-oriented with strong architectural instincts
• Detail-oriented with a strong focus on code quality and security
• Thrives in high-scale, high-impact environments
• Fast executor who values efficiency, speed, and precision
  
  
  

Benefits

• Remote Work Flexibility - Work from anywhere while staying connected with a high-performing team
• Career Growth Opportunities - Expand your expertise in digital marketing and client management
• Supportive Team Culture - Collaborate with passionate professionals who value teamwork and innovation
  
  

As part of our recruitment process, all candidates are kindly asked to read, understand, and agree to Lago's Confidentiality and Non-Circumvention Agreement. This ensures a respectful and professional experience for everyone involved.

• Remote Work: Work from anywhere—our team is global, and we value work-life balance.
• Growth Opportunities: As a key player i you'll have the chance to shape your role and grow with us.
• Innovative Culture: Join a team that is passionate about leveraging data to solve challenges and drive success in a rapidly evolving market
  
  

As part of our recruitment process, all candidates will be kindly asked to agree to Lago's Confidentiality and Non-Circumvention Agreement. This ensures a respectful and professional experience for everyone involved.