Prompt Engineer (Generative AI / LLM)

Job Overview:

InVitro Capital is seeking a highly skilled and strategic Senior Prompt Engineer with expertise in Cloud Solutions, AI, Python, and Backend Solution Design You will play a pivotal part in developing cutting-edge software solutions, leveraging cloud technologies, and implementing AI best practices. You will guide your team of engineers, ensuring the successful delivery of complex projects while shaping the technical direction of our innovative ventures. This is an exceptional opportunity to make a significant impact and contribute to the growth of our diverse portfolio.

Working Hours: Monday to Friday, Pacific Time Zone.

Key Responsibilities:

• Prompt Engineering Optimization: Design, refine, and maintain prompts, system messages, and few-shot examples to maximize LLM accuracy, tone consistency, and output safety.
• LLM Evaluation Testing: Conduct A/B tests and automated evaluations to track key metrics such as relevance, factuality, and response latency across models and use cases.
• Cross-Functional Integration: Collaborate with product, data science, and engineering teams to embed prompt logic into production systems and user-facing features.
• Prompt Library Management: Develop and maintain a centralized prompt library with documented best practices for reuse, scalability, and cross-product consistency.
• LLM Research Application: Stay up-to-date on the latest advancements in LLM prompting, safety guidelines, and tuning techniques to apply cutting-edge methods in production.

Requirements

Requirements:

• Education: Bachelor’s degree in Computer Science, Engineering, or a related field.
• Experience: 5+ years in AI solution engineering with a strong focus on prompting and client-facing collaboration.
• Language Proficiency: Demonstrate native or near-native English fluency, with strong sensitivity to tone, clarity, and nuance in language model outputs.
• LLM Prompting Experience: Hands-on experience crafting and optimizing prompts for models like GPT-4/4o, Claude, Gemini, or LLaMA 3 in real-world applications.
• NLP Evaluation Fundamentals: Strong understanding of core NLP concepts and practical methods for evaluating model relevance, accuracy, and performance.
• Python Proficiency: Skilled in using Python for fast prototyping, data analysis, and experimentation with language models and prompt workflows.
• Effective Communication: Ability to clearly explain prompt strategies, model behaviours, and trade-offs to technical and non-technical stakeholders.
• RAG Tool Use Integration (Would be a plus): Familiar with retrieval-augmented generation (RAG) pipelines and frameworks for tool calling, search augmentation, or dynamic context injection.
• LLM Safety Guardrails(Would be a plus): Knowledge of prompt-based guardrails, red teaming techniques, and best practices for ensuring safe, reliable, and ethical model behaviour.

Benefits

Why Join Invitro Capital?

• Work on cutting-edge AI and B2B technologies: We are at the forefront of AI and B2B innovation. Our employees have the opportunity to work on the latest and greatest technologies, and to make a real impact on the SME market.
• Help build and grow successful startups: We are committed to helping our portfolio companies succeed. Our employees play a vital role in building and growing these companies. This is not a 9 to 5 job. This is a startup environment with a give-it-all mentality.
• Work with some of the best minds in the industry: You will be part of a team of seasoned entrepreneurs and product leaders who are on a mission to make a difference in the SME space. You will have the chance to work with some of the best minds in the industry.
• Supportive and collaborative work environment: We believe in creating a supportive and collaborative work environment where our employees can thrive.
• Competitive compensation: We offer a competitive compensation package, with salaries ranging from [$4,000 to $ 5,000 monthly], payable in USD.