dentsu

Senior AI Engineer

Portugal · Work style not stated · Full time

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About the role

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Employerdentsu
LocationPortugal
Work styleWork style not stated
Employment typeFull time
Employer posted21 Jul 2026

Job Description:

Company Description

We Dream. We Do. We Deliver.

At Merkle, a dentsu company, we power theexperienceeconomy. Whetherwe’rebuilding the next greatapp, running CRM at scale for global brands, delivering technology architectures that support millions ofusers, or providing world-class data, identity, and insights solutions,it’sall in the name of craftingexperiences that set brands apart from the competition. Backed bydentsu'slegacy of innovation andcreativity originating in Japan,we’vespent over 35 years helping brands build loyalty, drive growth, andconnect meaningfully with their audiences.

We’vebeen named a global “Leader” by top industry analyst firms in categories as wide-ranging as digitaltransformation and commerce, experience design,engineeringand technology integration, digitalmarketing, data science,CRM andloyalty, and customer data management.

Show full description

Why choose Merkle?

Innovation at Our Core:As part ofdentsu’sglobal network, Merkle pushes the boundaries of customerexperience, integrating creativity, technology, and data to drive real-world impact. For over 35 years,we’vebeen innovating to meet the changing needs of our clients.

Global Reach with Local Expertise:With over16,000 employeesacross 30+ countries, and part of a70,000employees’network at dentsu, Merkle blends global insights with a deep understanding of localmarkets to deliver personalized, effective solutions.

Collaborative Culture:At Merkle, your ideas and contributions truly matter.You’lljoin a team that fostersinnovation, collaboration, and creative problem-solving. Together, we work on impactful internationalprojects, making meaningful connections every step of the way.

Job Description

Position Overview

Prompt Engineering & Technical Support

Our client is seeking a Senior AI Engineer to lead prompt engineering initiatives and provide technical support to business users. This role is focused on enabling business people across the organization to effectively utilize and maximize AI solutions. You will be the technical expert who coaches and supports users in crafting effective prompts and implementing AI tools within their workflows.

Key Responsibilities:

1. Prompt Engineering Excellence

Develop, refine, and establish best practices for effective prompt engineering across the organization
Support and coach business users in crafting prompts to maximize AI solution utilization
Create comprehensive guides, templates, and resources for prompt engineering
Troubleshoot and optimize prompts for better outcomes

2. Business User Support & Enablement

Provide hands-on technical support to business users implementing AI solutions
Conduct training sessions on AI tools and prompt best practices
Help integrate AI tools into business workflows and processes
Document and share technical learnings and case studies across the organization

3. Technical Leadership

Stay current with AI platforms, tools, and emerging capabilities
Evaluate new AI solutions for organizational use
Mentor junior technical staff on AI implementation
Lead technical communities of practice and knowledge-sharing initiatives

Required Qualifications:

Minimum 5+ years of experience with AI, machine learning, and/or LLM technologies
Advanced expertise in prompt engineering and AI tool utilization
Deep technical knowledge of AI capabilities, limitations, and best practices
Strong ability to break down complex AI concepts into practical guidance
Excellent communication skills, particularly with non-technical business users
Experience in technical training and mentoring
Hands-on experience with multiple AI platforms and tools

Preferred Qualifications

Advanced degree in Computer Science, AI, or related field
Certification in AI/ML or related technical areas
Experience with AI model fine-tuning and customization
Knowledge of AI governance and responsible AI practices

What We're Looking For:

A senior-level professional with deep expertise in their specialized domain who is passionate about AI and committed to enabling organizational success. The ideal candidate is collaborative, forward-thinking, and able to work effectively with stakeholders at all levels.

*Work visa sponsorship is not available.For local documentation (NIF, NISS), please consult Portuguese authorities.

Additional Information

Benefits andperks:

🌴25 vacation days

🤝Enjoy 2additionalvolunteering days to support your passion project

💖Mental Health: Benefit from 3 extra wellness days on top of your vacation days and a Mental HealthFirst Aider and EmployeeAssisstanceprogram to support your well-being

🏥Health insurance (also possible for family members)

💻Cutting Edge Technology & Latest IT tools

🏢Software-house environment

⌛Agile and Flexible working hours

🌍Hybridworking:we combine flexibility with in-person collaboration, with an expectation of 1 day per week/ 4 days per month in the office

✈️Digital nomad policy

🚀Focus on career development

🎓Full access to Dentsu Academy, our global online learning platform

🍻Beers, foosball, and ping-pong! #workhardplayhard

🥐Free breakfast every secondWednesdayof the month

🛍️Employee discounts

🎉Team & Company events

💸Referral bonus program

*At dentsu, Diversity, Equity, and Inclusion (DEI) is central to our vision: "To be at the forefront of people-centered transformations that shape society."

We cherish the unique talents and perspectives of all individuals, welcoming applicants regardless of gender, gender identity, nationality, religion, ethnicity, cultural background, sexual orientation, age, physical or mental ability. By embracing diverse perspectives, we create meaningful change and sustainable growth for our people, clients, and society. Our hiring decisions are guided by qualifications and role-specific requirements, ensuring a workplacefreefrom discrimination and harassment.

#LI-Hybrid #LI-MERKLE

Location:

Lisbon

Brand:

Merkle

Time Type:

Full time

Contract Type:

Permanent

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