Senior ML Engineer

About CalypsoAI

​CalypsoAI, established in 2018, is dedicated to securing the future of artificial intelligence by enabling enterprises to innovate confidently with cutting-edge security and compliance solutions. Our mission is to forge a secure path for safe AI adoption, empowering organisations to leverage AI technologies responsibly and without risk. ​

At CalypsoAI, we believe that securing the future of AI demands innovative thinkers from diverse disciplines and backgrounds. We are committed to building an elite team to advance groundbreaking technology and ensure businesses and society thrive with confidence.

Role Summary:

CalypsoAI is seeking a Senior Machine Learning Engineer, specialising in Artificial Intelligence and Large Language Models (LLMs), to lead the design, development, and deployment of intelligent tools within our pioneering security platform. This role requires deep technical expertise to architect cutting-edge AI/LLM solutions for AI red-teaming, defense, and securing agentic systems. You will drive the operationalisation of AI models, influence technical strategy for AI/ML components, and contribute significantly to our platform's core intelligence and security posture. Mentorship of junior team members is a key aspect of this role.

Key Responsibilities:

• Lead the design, development, fine-tuning, and evaluation of LLMs and other deep learning models for advanced AI security tasks (e.g., automated red-teaming, vulnerability analysis, adversarial simulation, intelligent defenses).
• Oversee the implementation and deployment of these AI/LLM-powered tools as robust, scalable, and production-ready features within CalypsoAI's security platform.
• Design and own end-to-end ML pipelines optimised for AI/LLM workflows, ensuring robustness, scalability, and maintainability (MLOps for AI).
• Collaborate closely with AI Researchers to guide the transition of novel AI/LLM solutions and security techniques from research into production-grade solutions.
• Provide technical leadership in integrating complex AI/LLM components seamlessly into our products, working closely with Software Engineers.
• Drive efforts to optimise AI/LLM models for inference speed, cost, efficiency, and resource utilisation.
• Establish best practices for monitoring model performance, safety, alignment, and security vulnerabilities in production.
• Champion and enforce software engineering best practices within the AI/LLM development lifecycle.
• Mentor junior engineers and scientists on the team, fostering technical growth.
• Contribute to strategic planning and roadmap definition for AI/ML components of the platform.

Required Qualifications:

• MS or PhD in Computer Science, Artificial Intelligence, Machine Learning, or a related quantitative field.
• 7+ years of relevant professional experience with a strong track record of developing and deploying complex AI/ML models, especially LLMs, into production environments.
• Expert-level programming skills in Python and deep experience with ML frameworks (TensorFlow/PyTorch) and AI/LLM libraries (e.g., Hugging Face Transformers, LangChain).
• Significant, proven experience deploying and managing sophisticated AI/ML models in production.
• Deep understanding of machine learning, deep learning, NLP, transformer architectures, and LLM evaluation techniques.
• Strong analytical and problem-solving skills applied to architecting and troubleshooting complex AI systems.
• Excellent communication skills and ability to articulate complex technical concepts.

Preferred Qualifications:

• Deep experience deploying LLMs or generative AI models using various frameworks (e.g., vLLM, TGI) and cloud services.
• In-depth understanding of LLM security vulnerabilities and mitigation strategies.
• Experience applying techniques like Reinforcement Learning from Human Feedback (RLHF).
• Proficiency with vector databases (e.g., Pinecone, Weaviate) and their application.
• Experience in cybersecurity or AI security domains.
• Contributions to the AI/ML field (e.g., publications, open-source projects).

Location

• Dublin Office: Thursdays
• Remotely or Dublin Office: Monday, Tuesday, Wednesday and Friday

Life at CalypsoAI & Employee Benefits

At CalypsoAI, we believe that our people are the driving force behind our success. We foster a dynamic, collaborative, and inclusive work environment where innovation thrives, and employees feel empowered to make a real impact. Whether you’re working remotely or at one of our offices, we ensure you have the tools, flexibility, and support to do your best work.

Our Benefits & Perks

We offer a competitive benefits package designed to support your well-being, growth, and work-life balance:
 

✅ 25 Days Annual Leave – We believe in the importance of rest and recharge. Enjoy generous time off to relax and pursue personal passions.

✅ Fully Covered Health & Dental Insurance – Your well-being is our priority. We provide comprehensive health and dental coverage to keep you and your family protected.

✅ Pension Plan (Up to 3% Employer Match) – We invest in your future with a competitive pension plan, matching contributions up to 3%.

✅ TaxSaver & Bike to Work Scheme – Save on commuting costs with our tax-efficient travel benefits, whether you prefer public transport or cycling.

✅ Income Protection – We offer financial security and peace of mind in the event of unforeseen circumstances.

✅ Hybrid Working – We embrace flexibility, offering a hybrid work model that allows you to balance in-office collaboration with remote work.

✅ Dublin City Centre Office – Our modern, conveniently located office in the heart of Dublin provides an inspiring space for collaboration and connection.

✅ Catered Lunch Twice a Week – For those working from the office, we provide delicious, catered lunches twice a week to fuel your productivity and connection with colleagues.

✅ Quarterly Social Events – We love bringing our teams together! From team outings to special events, we ensure there are plenty of opportunities to connect and have fun.

✅ Annual CalypsoAI Day – Each year, we dedicate a special volunteering day for employees to contribute to causes that matter.

✅ Learning & Development Platforms – We support continuous growth with access to online learning platforms, helping employees upskill and stay ahead in their careers.

✅ Work from Anywhere (Up to 3 Weeks Per Year) – Enjoy the freedom to work from anywhere in the world for up to three weeks each year.

✅ Increased Benefits with Tenure – At CalypsoAI, we recognise and reward long-term dedication. As you grow with us, you'll enjoy enhanced pension contributions and additional annual leave, ensuring your commitment is recognised and supported.

At CalypsoAI, you’ll be part of an ambitious, fast-growing team shaping the future of AI security. If you're looking for a role where you can make an impact while enjoying a supportive and rewarding work environment, we’d love to hear from you!