Senior Prompt Engineer
About the job
- Native fluency in German and fluent in English.
- Based in Germany.
- Bachelor’s, Master’s, or Doctorate degree in Computer Science, Data Science, Computational Linguistics, Human-Computer Interaction, Cognitive Science, or a related analytical field.
- At least 4 years' experience as Prompt Engineer. Proven experience tuning Large Language Models for strict, structured outputs, complex classification tasks, and familiarity with chain-of-thought and few-shot learning.
- Strong proficiency in identifying error patterns, analyzing model performance, and using SQL or other data analytics tools.
- Ability to quickly learn and master proprietary tools with minimal supervision.
- Excellent verbal and written communication skills.
- Utilize Automatic Prompt Generation (APG) tools to create baseline prompts for complex parent-child template clusters.
- Run and supervise Automated Prompt Optimization (APO) tool, review the outputs, and flag when the APO reaches deadlocks or plateaus.
- Manually draft, test, and refine prompts to navigate complex template architectures, overcome anti-patterns, and handle edge cases where tooling is lacking or broken. Solve edge-case scenarios by designing and refining manual prompts.
- Monitor shadowbot runs to ensure sufficient disagreements (between human and LLM ratings) are registered, generated, and tracked.
- Run prompt versions against established gold data to continuously measure autorater quality against the human crowd baseline, calculating accuracy metrics such as F1 scores, precision, and recall.
- Draft technical launch readiness justifications (Launch Certification Documentation) for final.
- Familiarity with enterprise-grade LLM interfaces like the Goose API.
- Experience in AI model evaluation, data science, computational linguistics, or software engineering.
- Hands-on experience with Automated Prompt Optimization (APO) systems or tuning workflows.
- Linguistic expertise, including an understanding of semantics and logic.
About the company
Welo Global coordinates five brands to provide multilingual AI, technology, and content solutions for more than 2,000 blue-chip clients in 300+ languages. Its offerings are delivered through technology-enabled services and proprietary platforms such as Opal for content localization, NIMO for AI supply-chain security, Legal Studio for IP workflows, and Adapt Studio for marketing translation, with brand-specific teams like Welocalize, Welo Data, Park IP, Welo Life Sciences, and Adapt. The company differentiates itself through brand specialization under one parent, a long 25+ year history, and integrated platforms that pair language services with AI data, model evaluation, legal and life sciences workflows, and global marketing translation supported by a network of over 500,000 linguists. The goal is to help clients scale global AI and content initiatives by delivering high-quality multilingual data, accurate localization, and efficient, technology-enabled services.
Company Size
5,001-10,000
Company Stage
N/A
Total Funding
N/A
Headquarters
N/A
Founded
N/A
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Simplify's Take
What believers are saying
- July 2026 Park IP and Clerq partnership deepens patent workflow distribution immediately.
- April 2026 Welo Life Sciences targets regulated pharma and medical-device demand.
- Rebranded platform now spans 2,000 clients and 300 languages, supporting cross-sell expansion.
What critics are saying
- 2025 removal waves and 2026 access losses show brittle contractor demand and churn.
- OpenAI, Google, and Scale AI commoditize multilingual evaluation, squeezing Welo Data margins by 2027.
- Welocalize still depends on human linguists, exposing an AI substitution cliff if clients self-serve.
What makes Welo Global unique
- April 2026 Welo Global split five brands around specific client segments.
- May 2026 Inkky gives Welo Data proprietary frontier-AI data production infrastructure.
- August 2026 Opal and Legal Studio reached 2026 A.I. Awards shortlists.
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Benefits
Remote Work Options
Flexible Work Hours
Company News
Welo Global recognized as leader in Localization Services. Welo Global has been recognized as a "Leader" in the latest evaluation by The Forrester Wave(TM): Localization Services, Q3 2026. This independent assessment highlights four leaders out of 11 evaluated localization service providers, placing Welo Global at the forefront of the industry. This recognition underscores the company's robust capabilities across 27 distinct criteria, split between "current offering" and "strategy". Notably, Welo Global achieved the highest possible scores in 15 out of 21 criteria for its current offering, and also excelled in strategic areas like vision, partner ecosystem, and talent strategy. According to GALA Global, Welo Global's approach is particularly well-suited for enterprises navigating the complexities of AI-driven localization needs. As outlined in the report, Welo Global delivers specialized localization, AI governance, and domain expertise to support regulated, brand-sensitive multilingual AI content. This is vital as AI increasingly integrates into enterprise production infrastructures, transforming localization from a mere translation service to an orchestration challenge, as articulated by the company's CTO, Chris Grebisz. The growing importance of AI in business environments has altered customer expectations for localization services. Welo Global's recognition stems from its ability to provide governance and trusted multilingual data that align with AI systems, allowing them to efficiently operate across diverse languages and markets. Paul Carr, CEO of Welo Global, emphasized that although translation remains a core component, the demand for governance and evaluative capabilities has surged as AI becomes more ingrained in corporate ecosystems. Welo Global's strategic emphasis on specialized services suggests that the future of the localization industry will heavily rely on these services, a perspective echoed in The Forrester Wave(TM) report. As enterprises increasingly seek to harness AI and expand their global reach, companies like Welo Global are positioning themselves as pivotal partners capable of addressing these multifaceted challenges. Intelligence. Why this matters * Welo Global excels in AI governance for localization. * Recognition highlights demand for specialized localization services. * Enterprises need trusted multilingual data for AI systems. Enterprise Buyers LSPs Related reading. Keep independent coverage alive. No ads. No paywall. No corporate backing. Just sharp, weekly intelligence on the language industry - free, because it should be.