BJAK Logo

BJAK

Senior Machine Learning Engineer

Reposted One Month Ago
Be an Early Applicant
Remote
Hiring Remotely in Ireland, IRL
Senior level
Remote
Hiring Remotely in Ireland, IRL
Senior level
Own and ship core ML subsystems end-to-end for a proactive, long-horizon AI assistant. Work includes data preparation, training, evaluation, inference, debugging production failures, optimizing for latency/cost/reliability, and mentoring other ML engineers.
The summary above was generated by AI
About ActAI

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they're not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.

Our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. We believe products will greatly reduce hallucinations.

Our objective is to organise anyone's life, allowing us all to spend time on valuable and meaningful things.

 
Role

As a Senior Member of Technical Staff, Machine Learning, you are an independent owner of critical ML subsystems in production. You take ambiguous problems, design practical solutions, and ship systems that operate reliably at scale.

This is a hands-on, high-impact role focused on depth.

 
Focus
  • Build core ML systems that power a proactive, long-horizon AI product.

  • Own work end-to-end: data preparation, training, evaluation, inference, and iteration.

  • Turn research ideas into working systems that run reliably in production.

  • Debug model failures and system issues using real production signals.

  • Iterate quickly: ship, measure outcomes, refine, and repeat.

  • Collaborate closely with research, product, and engineering to deliver real user impact.

  • Mentor and review work from other ML engineers through example and technical judgment.

  • Work under real production constraints: latency, cost, reliability, and safety

 
Tech Stack
  • Python

  • PyTorch / JAX

  • GPU-based training and inference systems

 
Ideal Experience
  • You have built and shipped ML systems used by real users.

  • You understand how modern ML models behave — and misbehave — in production.

  • You write strong, production-quality code and think in systems, not scripts.

  • You take ownership, work independently, and push work across the finish line.

  • You learn fast, communicate clearly, and improve through iteration.

 
Outcomes
  • ML models and systems in production consistently meet accuracy, latency, reliability, and efficiency targets.

  • Complex production issues are monitored, debugged, and resolved with minimal disruption.

  • Training, inference, and data pipelines are robust, scalable, and maintainable over time.

  • Drives measurable improvements in ML systems based on real-world signals and user feedback.

  • Provides mentorship and technical guidance to peers, raising the overall ML engineering standard.

  • Collaborates cross-functionally to ensure ML features integrate seamlessly into products and meet business goals.

 
How We Work

The best products today in the world were built by small, world class teams. We are a high talent density and hands-on team. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical product

 
Interview process

If there appears to be a fit, we'll reach to schedule 3, but no more than 4 interviews.

Applications are evaluated by our technical team members. Interviews will be conducted via virtual meetings and/or onsite.

We value transparency and efficiency, so expect a prompt decision. If you've demonstrated the exceptional skills and mindset we're looking for, we'll extend an offer to join us. This isn't just a job offer; it's an invitation to be part of a team that's bringing AI to have practical benefits to billions globally.

Similar Jobs

4 Days Ago
Remote
Ireland, IRL
Senior level
Senior level
Artificial Intelligence • Information Technology • Consulting
Design, train, and evaluate large multimodal and vision-language-action models for robotic agents. Develop reinforcement and imitation learning methods, embodied datasets, simulation environments, world models, planning systems, and sim-to-real experiments. Build robust research software and distributed training infrastructure, validate approaches on physical robots, and collaborate with research and engineering teams to deploy reliable systems. Communicate findings through technical reports, open-source releases, demonstrations, and publications.
Top Skills: Ci/CdComputer VisionControl SystemsDistributed CheckpointingDistributed TrainingFlashattentionFsdpImitation LearningIsaac LabIsaac SimJaxMixed-Precision TrainingMujocoMultimodal Foundation ModelsPlanningPybulletPythonQuantizationReinforcement LearningRoboticsRosTransformer ModelsVersion ControlZero
5 Days Ago
Remote
Ireland, IRL
Senior level
Senior level
Artificial Intelligence • Information Technology • Consulting
Designs, builds, and evaluates research prototypes and production-ready systems for portable AI agents, model routing, provider interoperability, memory, retrieval, tool use, and multi-agent workflows. Responsibilities include developing evaluation frameworks, conducting statistically rigorous experiments, creating schemas and APIs, optimizing model and agent systems, and translating research into secure, reliable, reusable components. The role collaborates across research, infrastructure, security, product, and engineering teams and communicates findings through technical reports, benchmarks, demonstrations, open-source releases, and publications.
Top Skills: Anthropic-Style ApisAPIsCi/CdData SchemasDistributed ServicesGoKnowledge GraphsLarge Language ModelsMachine LearningMcpObservabilityOpenai-Compatible ApisPythonRustTestingTypescriptVector Search
11 Days Ago
In-Office or Remote
Ireland, IRL
Senior level
Senior level
Artificial Intelligence • Consumer Web • Digital Media • Machine Learning • Software
Develop and optimize large-scale advertising ranking models for CTR and CVR prediction, calibration, user representations, and sequence modeling. Own machine learning systems end to end, including data pipelines, feature engineering, training, evaluation, deployment, and maintenance. Collaborate with platform, product, data science, and engineering teams to run experiments and improve advertiser outcomes, revenue, and user relevance. Apply deep learning and recommendation techniques within production latency, reliability, and cost constraints.
Top Skills: PythonPyTorchTensorFlow

What you need to know about the Dublin Tech Scene

From Bono and Oscar Wilde to today's tech leaders, Dublin has always attracted trailblazers, with more than 70,000 people working in the city's expanding digital sector. Continuing its legacy of drawing pioneers, the city is advancing rapidly. Ireland is now ranked as one of the top tech clusters in the region and the number one destination for digital companies, with the highest hiring intention of any region across all sectors.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account