Gemini Prompt Engineer / Evaluator (Advanced Prompting Focus)

Adeva is a global talent network that enables work without boundaries by connecting tech professionals with top companies worldwide. 

We are looking for a skilled Gemini Prompt Engineer / Evaluator to support the development of a next-generation GenAI assistant for a leading financial institution. In this role, you will design, evaluate, and refine prompt templates to ensure optimized intent recognition, consistent and reliable outputs, and effective fallback logic. You’ll be joining a highly collaborative team working on an ambitious GenAI initiative, playing a key role in shaping how the assistant interprets and responds to user input in a real-world banking context.

Responsibilities

• Design, craft, and refine Gemini prompt templates tailored to specific user intents and use cases.
• Apply both foundational and advanced prompting techniques to improve response quality, contextual understanding, and reliability.
• Evaluate prompt effectiveness using qualitative and quantitative methods.
• Collaborate with architects, product managers, and developers to ensure prompt design aligns with broader system goals.
• Optimize prompts for edge cases, ambiguity, and fallback routing.
• Maintain a prompt registry with version control and evaluation notes.
• Contribute to the development of internal prompt evaluation frameworks and testing tools.

Requirements

• 5+ experience working with LLMs, preferably Gemini or similar models (OpenAI, Claude, etc.).
• Deep knowledge of prompt engineering best practices, including zero-shot, few-shot, and chain-of-thought prompting.
• Proven experience designing prompts for enterprise or production-grade GenAI applications.
• Familiarity with evaluation metrics and prompt A/B testing approaches.
• Must be available to overlap with Vietnam business hours.
• Fluent English and excellent communication skills.
• Ability to work as part of an international, distributed team and resolve potential issues and challenges that come with remote work.

About Adeva

Adeva is an exclusive network of engineers, product and data professionals that connects consultants with leading enterprise organizations and startups. Our network is distributed all over the world, with engineers in more than 35 countries. Our company culture builds connections, careers, and employee growth. We are creating a workplace from the future that values flexibility, autonomy, and transparency. If that sounds like something you’d like to be part of, we’d love to hear from you.