Senior Machine Learning Engineer, AI-Native Evaluation & Search

Work180; United Kingdom; Hybrid; GBP 90,000 - 150,000; Full time

Job summary

At Atlassian, we’re looking for a Senior Machine Learning Engineer to join our Search & Intelligence organization. We build AI-native experiences, agentic systems, models, evaluation frameworks, and data platforms that power Atlassian’s AI products.

You’ll design and deploy production ML solutions, partner with data engineers and product teams, and continuously improve model quality with robust evaluation strategies. We support flexible work locations and a collaborative culture.

Qualifications

• Bachelor's or Master's in CS/ML or equivalent experience.
• At least 4 years of production ML/AI experience.
• Strong Python skills and production language experience (Java/Kotlin/TypeScript).
• Experience with SQL and large-scale data processing (Spark).
• Experience deploying and scaling models with large datasets.
• Designing evaluation strategies and analyzing model quality.
• Familiarity with cloud ML/data platforms (AWS/Databricks).
• Ability to solve ambiguous problems and deliver production-quality solutions.
• Strong communication and collaboration skills.
• Agile mindset and continuous improvement.

Responsibilities

• Develop and deploy ML/AI systems in production.
• Collaborate with data engineers and product teams.
• Iterate on model evaluation and deployment strategies.
• Scale models to handle large datasets and services.

Skills

Python

Java

Kotlin

TypeScript

Communication

Education

Bachelor’s or Master’s degree in Computer Science, ML, Data Science, or related field

Tools

SQL

Spark

AWS

Databricks

Job description

Atlassian is looking for a Senior Machine Learning Engineer to join our Search & Intelligence organization. We build AI-native experiences, agentic systems, models, evaluation frameworks, and data platforms that power Atlassian’s AI products.

Working at Atlassian

Atlassians can choose where they work – whether in an office, from home, or a combination of the two. That way, Atlassians have more control over supporting their family, personal goals, and other priorities. We can hire people in any country where we have a legal entity.

On your first day, we’ll expect you to have

• A Bachelor’s or Master’s degree in Computer Science, Machine Learning, Data Science, or a related field, or equivalent experience.
• At least 4 years of experience developing and deploying machine learning or AI systems in production.
• Strong Python skills and experience with Java, Kotlin, TypeScript, or another production language.
• Experience with SQL and large-scale data processing technologies such as Spark.
• Experience building, evaluating, deploying, and scaling models with large datasets.
• Experience designing evaluation strategies, analyzing model quality, and using results to guide improvements.
• Familiarity with cloud-based ML and data platforms such as AWS or Databricks.
• Ability to independently solve ambiguous problems and deliver practical, production-quality solutions.
• Strong communication and collaboration skills.
• An agile mindset and commitment to continuous improvement.

It’s great, but not required, if you have

• Experience building AI-native products, RAG systems, conversational assistants, or tool-using agents.
• Experience with evaluation-driven development, benchmarks, regression testing, human evaluation, or LLM-as-a-judge.
• Experience evaluating agent planning, tool use, task completion, or multi-step reasoning.
• Experience with search relevance, ranking, recommendations, personalization, embeddings, or NLP.
• Experience fine-tuning, post-training, evaluating, or optimizing large language models.
• Experience with ML platforms, model serving, data pipelines, observability, or responsible AI.
• Experience mentoring engineers or influencing technical direction within a team.

Benefits & Perks

Atlassian offers a wide range of perks and benefits designed to support you, your family and to help you engage with your local community. Our offerings include health and wellbeing resources, paid volunteer days, and so much more. To learn more, visit go.atlassian.com/perksandbenefits.

About Atlassian

At Atlassian, we're motivated by a common goal: to unleash the potential of every team. Our software products help teams all over the planet and our solutions are designed for all types of work. Team collaboration through our tools makes what may be impossible alone, possible together.

We believe that the unique contributions of all Atlassians create our success. To ensure that our products and culture continue to incorporate everyone's perspectives and experience, we never discriminate based on race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. All your information will be kept confidential according to EEO guidelines.

To provide you the best experience, we can support with accommodations or adjustments at any stage of the recruitment process. Simply inform our Recruitment team during your conversation with them.

To learn more about our culture and hiring process, visit go.atlassian.com/crh.

In line with local law, identity verification (which may include use of biometric data) is a condition of employment with Atlassian for employment fraud purposes.