Senior AI Research Engineer

United States Digital Space LLC; Pittsburgh (Allegheny County); On-site; USD 197,200 - 266,800; Full time

Job summary

United States Digital Space LLC is seeking a Senior AI Research Engineer to join the Video Call team. You will work on a full-stack group with frontend, backend and AI researchers to develop and train ML models, including large language models, speech and text-to-speech systems, and to align outputs with company goals.

The role emphasizes mentoring, architecture guidance, monitoring, and delivering scalable AI solutions.

Qualifications

• Proven AI research engineer experience with LLMs or multimodal modeling.
• Strong background in training and fine-tuning large models in applied settings.
• Excellent leadership and communication to guide teams and set quality standards.
• Deep understanding of ML concepts, frameworks, and best practices.

Responsibilities

• Join a full-stack team of frontend, backend and other AI researchers to foster collaboration.
• Develop and train ML models including large-scale neural networks, speech recognition, and TTS systems.
• Collaborate with cross-functional teams to align model outputs with company objectives.
• Participate in strategic product and business decisions with Language Learning leadership.
• Stay current with ML advances and apply them to drive project progress.
• Mentor engineers and guide best practices across the team.
• Ensure delivery of high-quality, scalable ML solutions.

Skills

AI research

LLMs

Multimodal modeling

Speech models

Leadership

Communication

Mentoring

ML frameworks

Fine-tuning

Training data

Education

Advanced degree in CS/ENG with ML focus

Job description

Our mission at the company is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

At the company, you’ll join a team that cares about finding innovative solutions to complex technical problems, running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful.

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.

About the role

We are looking for a Senior AI Research Engineer to join our the company Video Call team. The ideal candidate will have a proven track record as an AI research engineer, with experience across various machine learning techniques including large language models, speech models, benchmarking, and/or personalization. They will have experience at multiple levels of the ML stack, including feature engineering, developing training data, fine-tuning, reinforcement learning, quality evaluations, deployment, and monitoring. On the Video Call team, we’re building AI systems that support the core learning mission of the company, improving the learning experience and helping our learners build healthy, productive habits. Given the wide array of AI domains, broad experience in AI/ML is highly desirable.

You will

• Join a full-stack team of frontend, backend and other AI Research engineers, fostering a collaborative and innovative work environment.
• Contribute to the development and training of a variety of machine learning models, including large-scale neural networks, speech recognition, and text-to-speech systems.
• Collaborate with cross-functional teams to understand their needs, to align the models’ outputs with company objectives.
• Participate in and influence strategic product and business decision making with members of the Language Learning leadership group.
• Stay up-to-date with the latest developments in machine learning and apply this knowledge to drive advancements in our projects.
• Mentor team members, providing guidance and support in their professional development.
• Ensure the delivery of high-quality, scalable, and efficient machine learning solutions.

You have

• Proven experience as an AI research engineer, for example, in LLMs, multimodal modeling, speech, or related fields.
• Strong background in training and fine-tuning large models in an applied setting.
• Advanced degree in Computer Science, Engineering, or a related field with a focus on machine learning or artificial intelligence, or equivalent experience.
• Excellent leadership and communication skills, with the ability to lead and inspire a team.
• Technical depth sufficient to guide architecture and implementation trade‑offs, evolve quality standards, and mentor engineers on best practices.
• Deep understanding of machine learning concepts, frameworks, and best practices.

Salary Range: $197,200 — $266,800 USD

Benefits

Take a peek at how we care for our employees' holistic well-being with our benefits here.

Accommodations

We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact [e-mail].

Equal Employment Opportunity

the company is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

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