Full Stack Developer (AI-First) at Full Circle Agency in Serbia

Job Title: Full Stack Developer (AI-First)
Department: Engineering
Reports To: Engineering Lead
Location: Remote, CST
Compensation: Competitive salary based on experience

About Us:

We are a fast-growing, high-performance agency operating at the intersection of eCommerce, Amazon, growth, systems, and AI. Our team helps ambitious brands scale, and we’re increasingly focused on building internal tools, automation layers, intelligence systems, and AI-powered products that drastically improve business operations. We are not interested in using AI in a superficial way—we’re creating an AI-native agency model where intelligent systems enhance internal workflows, data visibility, decision-making, execution speed, and product capabilities.

This Role Is NOT For You If:

• You’re satisfied with maintaining old workflows or outdated methods.
• You don’t think about the future of AI and emerging tools.
• You struggle to quickly learn new tools and technologies.
• You prefer working in slow-moving, non-agile environments.
• You don’t enjoy building scalable, high-performance software.

This Role IS For You If:

• You’re passionate about AI and building intelligent systems that drive real business impact.
• You’re a builder who thrives on experimenting with new technologies and pushing boundaries.
• You’re fluent in both frontend and backend development and excited by full-stack engineering.
• You think in terms of leverage: automating processes, making workflows smarter, and using AI to increase output and decision-making.
• You are a self-starter who takes ownership, moves fast, and is excited to work in a fast-paced, high-agency environment.

What Success Looks Like:

In your first 90 days, you will:

• Build Scalable Systems: Develop modern full-stack applications, covering frontend, backend, databases, and infrastructure.
• Integrate AI: Use Claude Code and other AI tools to drive faster development and smarter workflows.
• Prototype New Ideas: Experiment with new products and features, quickly prototyping and refining the best ideas into production systems.
• Automate Workflows: Develop AI-first workflows and automation tools to eliminate repetitive tasks.
• Collaborate with Leadership: Work closely with leadership to identify high-leverage areas where AI and software can have the biggest impact.

Your Responsibilities:

1. Full Stack Development

• Frontend Development: Build modern, scalable front-end applications using frameworks like React, Next.js, and TypeScript.
• Backend Development: Develop backend systems with Node.js, Python, and scalable system designs.
• System Design: Design and implement APIs, databases, and cloud infrastructure to power applications.

2. AI Integration

• Claude Code Utilization: Use Claude Code extensively to speed up software development, including building, debugging, refactoring, and exploring architecture.
• AI-First Tools: Build AI-powered utilities and tools that integrate seamlessly into business processes.

3. Product and System Innovation

• Automation: Automate internal processes, including data workflows, and build agent-based systems to reduce manual work.
• AI Copilots: Create AI assistants and intelligent interfaces that help internal and external users improve productivity.
• Prototyping: Rapidly prototype new product ideas and features, then refine the most promising ones into production-ready systems.

4. Collaboration & Experimentation

• Leadership Collaboration: Partner with leadership to identify opportunities where AI and software can create leverage and deliver value.
• Tool and Model Experimentation: Stay on the cutting edge by experimenting with new AI models, tools, and frameworks.

What We’re Looking For:

Required Skills & Traits:

• Strong experience as a Full Stack Developer.
• Experience with modern frontend tools like React, Next.js, TypeScript, or similar.
• Strong backend experience using Node.js, Python, APIs, databases, and scalable system design.
• Proficiency with Claude Code for building, debugging, and optimizing software.
• A genuine obsession with AI, emerging tools, and the future of software development.
• Strong communication skills with the ability to work effectively in a fast-moving team.
• Ability to move quickly, take ownership, and solve complex problems with minimal direction.

Nice to Have:

• Experience with OpenAI, Anthropic, Gemini, or open-source models.
• Familiarity with building agent frameworks, RAG, vector databases, or tool-calling systems.
• Experience building internal platforms, analytics systems, or automation tools.
• Startup or high-performance agency experience.
• Experience shipping software quickly while maintaining high engineering standards.

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Why This Role Is Different:

This is not a maintenance role. It’s not for someone comfortable with slow-moving corporate environments or traditional development. This role is for someone who wants to help shape the future of an ambitious, AI-first company and play a key part in developing the products that come out of it. You’ll have room to experiment, push ideas forward, and help define how AI truly integrates into a business with real momentum.

Application Process:

1. Submit Your Application: Send your resume and a brief cover letter detailing your relevant experience.
   

2. Assessment: If shortlisted, complete an assessment to showcase your technical skills and ability to think strategically.
3. Interview: Candidates will go through 1-2 rounds of interviews to evaluate your full-stack development expertise, AI fluency, and problem-solving approach.

Ready to Shape the Future? Apply Now!

We are an equal opportunity employer and celebrate diversity in our workforce.