Senior AI Egnineer

Nexthink seeks a Senior AI Engineer in Lausanne to lead the design and deployment of scalable, production-grade AI systems and LLM-powered applications within its cloud platform.

As the market leader in digital employee experience management, Nexthink is looking for an expert to drive the evolution of its cloud platform. This position focuses on taking AI capabilities from initial prototyping through to mature, scalable production systems, ensuring architectural excellence and robust operational standards.

Responsibilities

• Architect, build, and maintain high-performance AI and machine learning systems, including large language model applications, natural language processing models, retrieval-augmented generation pipelines, and multi-agent architectures.
• Lead critical architectural choices regarding model selection, training methodologies, fine-tuning approaches, retrieval strategies, orchestration layers, and underlying infrastructure.
• Integrate third-party AI services and large language model providers into the company’s cloud ecosystem.
• Establish comprehensive evaluation frameworks for both online and offline performance, defining clear success metrics for AI systems.
• Develop and maintain monitoring dashboards to track system quality and identify regressions in live environments.
• Create automated evaluation pipelines to assess prompts, embeddings, models, and agent workflows.
• Implement and sustain reproducible machine learning pipelines alongside continuous integration and deployment workflows for AI components.
• Oversee the deployment, monitoring, and lifecycle management of models and AI artifacts in production.
• Collaborate closely with product managers, designers, software engineers, and data scientists to align technical solutions with business goals.
• Mentor and guide junior AI engineers on best practices for building and operating production-grade systems.

Requirements

• Bachelor’s or Master’s degree in Computer Science, Machine Learning, Data Science, or a related discipline.
• At least five years of professional software engineering experience, with a track record of shipping and operating cloud services in production.
• Proven hands-on experience developing LLM-powered applications or other machine learning and natural language processing solutions.
• High proficiency in Python and major AI frameworks.
• Deep understanding of machine learning fundamentals, including supervised and unsupervised learning, optimization techniques, and model evaluation.
• Experience working with NLP systems such as embeddings, semantic search, retrieval mechanisms, and text classification.
• Practical experience integrating and operating large language models, including prompting, evaluation, observability, RAG, and agentic workflows.
• Strong MLOps background, including reproducible pipelines, experiment tracking, automated evaluation, and CI/CD for models and prompts.
• Demonstrated experience with AWS and cloud-based AI deployments.
• Excellent communication skills in English, with the ability to explain complex AI concepts to both technical and non-technical audiences.

Nice to have

• Extensive experience with AWS or equivalent cloud platforms for building scalable AI infrastructure.
• Background in optimizing models for latency, throughput, and cost efficiency.
• Experience in fine-tuning large language models.
• Familiarity with multi-agent systems and orchestration frameworks.
• Experience designing AI systems for enterprise or B2B environments.

What the company offers

• Permanent employment contract with a competitive compensation package.
• Modern office space conveniently located next to the Prilly-Malley train station.
• Hybrid work model that balances remote and office work, with a structured onboarding process for new hires.
• Flexible working hours and unlimited paid time off, in addition to 25 days of statutory holidays and three company-paid volunteer days.
• Free access to a fitness center located within the building.
• Reimbursement for the half-fare public transport travel card.
• Reimbursement of up to 50% for French language classes.
• Complimentary fresh fruit, cookies, and soft drinks.
• Regular company and team events, including volunteer days, pizza talks, team building activities, and office-hosted meetups.
• Referral bonuses for successful hires after three months of continuous employment.
• Relocation support for candidates moving from another country.

About the company

Nexthink fosters a collaborative culture known as 'One Team,' where employees connect, collaborate, and innovate to drive continuous growth. The company places a strong emphasis on diversity, inclusion, and equity, boasting a workforce of over 75 nationalities from diverse cultural and linguistic backgrounds.

• A unified team approach focused on connection, collaboration, and innovation.
• A strong commitment to diversity, inclusion, and equity across the organization.
• A multicultural environment with employees from over 75 different nationalities.