Senior AI Engineer

The Senior AI Engineer is an individual contributor who defines technical direction while driving the quality, scalability, and reliability of next-generation AI-powered systems. This role operates at the intersection of research, software engineering, and advanced testing, transforming cutting-edge ideas into robust, production-ready platforms.

This is a senior individual contributor leadership role: the Senior AI Engineer operates as a force multiplier, shaping architecture and core platforms and frameworks, guiding teams, and also pioneering and designing research projects that are evaluated, presented, and then delivered at enterprise scale with high confidence.

About RWS

RWS is a global AI solutions company empowering the world’s most trusted enterprise AI.

Our proprietary Cultural Intelligence Layer, powered by 250,000 data specialists, cultural and language experts and deep domain professionals, backed by 45+ patents, makes enterprise AI culturally fluent, contextually accurate and secure, ensuring every interaction reflects a brand’s tone, context and customer values.

Through our Generate, Transform and Protect segments, we deliver intelligent content, enterprise knowledge, large-scale localization and IP protection for global growth. Trusted by 80+ of the world’s top 100 brands, RWS provides the confidence, governance and expertise organizations need to deploy AI safely, responsibly and at scale.

Headquartered in the UK, RWS is listed on AIM (RWS.L).

More information: rws.com .

About AI Platforms And Excellence

The AI Platforms and Excellence team aims to accelerate the development of external-facing, product-ready AI capabilities that materially differentiate RWS offerings, improve customer outcomes, and drive revenue growth across the business.

The team provides a centralized, execution-focused capability that productizes AI at scale. It delivers reusable platforms, proven patterns, and clear guardrails so product teams can rapidly ship secure, high-quality, and commercially relevant AI features, consistently and sustainably.

With a global reach, RWS provides technology and services to over 7500 end users worldwide. Our core functions encompass Enterprise & Technical Architecture, Network & Voice, Infrastructure, Service Delivery, Service Operations, Data & Analytics, Security & Quality Compliance, Transformation, Application Development, and Enterprise Platforms.

Key Responsibilities

Proven experience designing and leading evaluation for AI/ML systems: defining metrics and methodology, building evaluation pipelines, managing test sets, and reasoning rigorously about model quality and regressions.

Strong command of evaluation concepts — various types of metrics (accuracy, precision, recall, F1), the distinction and tradeoffs between automated and human evaluation, statistical significance, and the limits of each approach.

Excellent written and verbal communication, and a history of influencing technical direction across teams and mentoring other engineers.

Comfort with ambiguity and the judgment to scope, prioritize, and sequence high-impact work with limited direction.

Preferred

• Deep experience evaluating NLP, machine translation, or content-generation systems, including metrics such as COMET, chrF++, BLEU, MetricX, and MQM-style human evaluation.
• Experience with experimentation and observability tooling, data/test-set versioning, and rigorous benchmarking workflows.
• Established practice in AI governance and documentation - model cards, system cards, reproducibility, and responsible-AI considerations - at an organizational level.
• Broad familiarity with the modern LLM ecosystem (open and proprietary models, orchestration frameworks, vector stores) and well-formed views on the tradeoffs.
• Experience supporting multilingual or localization-focused products at enterprise scale.
  
  

For all applicants in Poland and accordance with applicable pay transparency legislation, candidates will be informed of the salary range for this position prior to interview. Pay is determined without reference to previous salary history and is aligned to objective job‑related criteria.

Life at RWS

Life at RWS - If you like the idea of working with smart people who are passionate about growing the value of ideas, data and content by making sure organizations are understood , then you’ll love life at RWS.

Our purpose is to unlock global understanding. This means our work fundamentally recognizes the value of every language and culture. So, we celebrate difference, we are inclusive and believe that diversity makes us strong. We want every employee to grow as an individual and excel in their career.

In return, we expect all our people to live by the values that unite us: to partner

, putting clients fist and winning together, to pioneer, innovating fearlessly and leading with vision and courage, to progress, aiming high and growing through actions and to deliver, owning the outcome and building trust with our colleagues and clients.

RWS embraces DEI and promotes equal opportunity, we are an Equal Opportunity Employer and prohibit discrimination and harassment of any kind. RWS is committed to the principle of equal employment opportunity for all employees and to providing employees with a work environment free of discrimination and harassment. All employment decisions at RWS are based on business needs, job requirements and individual qualifications, without regard to race, religion, nationality, ethnicity, sex, age, disability, or sexual orientation. RWS will not tolerate discrimination based on any of these characteristics.

RWS Values

Get the 3Ps right – Partner, Pioneer, Progress – and we´ll Deliver together as RWS.

Recruitment Agencies: RWS Holdings PLC does not accept agency resumes. Please do not forward any unsolicited resumes to any RWS employees. Any unsolicited resume received will be treated as the property of RWS and Terms & Conditions associated with the use of such resume will be considered null and void.