Senior Prompt Engineer

BOLD is a global organization that helps people find jobs by creating digital products that empower millions in 180 countries to build resumes, cover letters, and CVs. The company values diversity and inclusion and operates as an Equal Opportunity Employer.

• 5+ years of professional experience working closely with language technologies, computational linguistics, or software product development.
• 2+ years of hands-on experience shipping LLM-backed features to production for consumer applications.
• Mastery of advanced prompt engineering techniques including few-shot, chain-of-thought, ReAct, and prompt chaining.
• Deep familiarity with LLM evaluation tools and frameworks such as RAGAS, LangSmith, TruLens, or custom heuristic testing.
• Proven ability to manage complex prompt deployment pipelines in a fast-paced, continuous integration environment.
• Fluent English at C1 level with strong written and verbal communication skills.
• Collaboration with global teams, with availability in the late afternoon (up to 7:00 PM Polish time).

Nice to have:

• Experience with resume builder products, HR tech, or career content platforms.
• Familiarity with fine-tuning, RLHF, or preference data collection workflows.
• Experience with structured output validation (JSON Schema, Pydantic, or equivalent).
• Familiarity with orchestration tooling such as LangChain, LlamaIndex, LangSmith, PromptLayer.
• Contributions to open-source prompt design projects or published writing on the topic.

• Design, prototype, and iterate complex system prompts, few-shot exemplars, and chain-of-thought structures for AI experiences including Resume Adaptation, Personalization, and Real-time Feedback.
• Partner with LLM/Machine Learning Engineers, Product Managers, and UX Designers to translate product requirements into technical prompt specifications, optimizing latency and API costs.
• Architect evaluation frameworks (automated, heuristic, human-in-the-loop) to benchmark, test, and guardrail LLM outputs against hallucination, bias, and tone drift.
• Develop standardized prompt frameworks, version-control workflows, and operational playbooks for safe and efficient AI use across distributed product teams.
• Monitor the evolving generative AI landscape, including OSS models and prompt techniques, to improve product performance and model throughput.

You must live in Poland or be willing to relocate to Poland to be considered for this role. Collaboration requires periodic availability in late afternoon up to 7:00 PM Polish time.