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Prompt Engineer

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Mad Devs

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IT - Software Development

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Job Description:

We're seeking Prompt Engineer to join our team. This is your chance to apply your skills to a project with real-world impact. At Mad Devs, you'll join a passionate team dedicated to solving complex challenges and delivering innovative solutions. Our projects span Europe, the USA and South East Asia, giving you the opportunity to make a global impact. We value flexibility, remote working and professional development, ensuring you thrive in an inspiring environment. Join us in revolutionizing the legal industry with AI!

Job Responsibility:

  • System Prompt Architecture: Design complex, structured system prompts. Use Chain-of-Thought and Few-Shot techniques to solve complex logic tasks (e.g., "Diagnose this car issue based on the user's description")
  • Structured Generation (JSON): Engineer prompts that reliably output valid JSON for API integrations. You must ensure the model follows schema constraints 100% of the time
  • Voice Persona Design: Control the agent's tone and pacing. Use instructions to influence output, making the agent sound empathetic, professional, or urgent as needed
  • Jinja2 Integration: Embed dynamic data into prompts. You must write prompts that are robust enough to handle empty variables or unexpected data formats ({{ user_history }})
  • Optimization: Continuously A/B test prompts to reduce hallucinations and improve conversion rates (e.g., "Did the agent successfully book the meeting?")

Requirements:

  • Deep LLM Expertise: You know the difference between GPT-4 and Claude 3 Opus. You understand token limits, temperature, and context windows
  • Technical Proficiency: You are comfortable working with JSON and Markdown. You can write basic Jinja2 templates
  • Analytical Mindset: You don't just "guess" improvements
  • you analyze conversation logs to find the root cause of errors
  • Linguistic Precision: Excellent command of English to catch subtle nuances in interaction
  • Language: Russian (Native/Fluent) and English (B2+)
What we offer:
  • Flexible working hours
  • Remote-first culture
  • Long-term projects
  • Salary in dollars
  • Professional communities
  • Onsite business trips
  • Training budget
  • Paid conferences

Additional Information:

Job Posted:
February 16, 2026

Work Type:
Remote work
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