Associate AI Engineer

T-Mobile; Factoria (WA); On-site; USD 81,000 - 146,000; Full time

Benefits offered by this job

Annual stock grant

Employee stock purchase plan

401(k)

Paid time off

Bonuses

Job summary

T-Mobile is seeking an Assoc Engineer, AI Modeling to advance AI-powered customer service. You will help build and tune AI models, integrate them into production, and collaborate with engineers and business experts to improve customer interactions and satisfaction.

The role emphasizes prompt design, RL, and retrieval-augmented generation, with a focus on reliability and efficiency across AI applications in customer service operations.

Qualifications

• Bachelor’s degree in CS/AI or related field required.
• Master’s degree preferred.
• Experience with AI model development and optimization.

Responsibilities

• Assist in building agentic AI systems using Generative AI models and tools through APIs.
• Support optimization of AI system performance via prompt engineering, fine-tuning, and RL.
• Develop and maintain software components and pipelines for deployment, testing, evaluation, and monitoring.

Skills

LLM fine-tuning

Prompt engineering

Python

AI orchestration

APIs

Cross-functional collaboration

Education

Bachelor’s degree in Computer Science/AI or related field

Master’s degree preferred

Tools

OpenAI APIs

Hugging Face

LangChain

LlamaIndex

Vector databases

Job description

At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees get the same big love we give our customers. All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees!

Are you ready to join the Un-carrier movement?

The Assoc Engineer, AI Modeling at T-Mobile is instrumental in supporting the development and optimization of AI models that enhance customer service automation. This role involves applying techniques such as prompt engineering and fine-tuning to improve AI performance. The Assoc Engineer collaborates with cross-functional teams to integrate AI-driven enhancements into production systems, thereby improving customer interactions and satisfaction. By contributing to the architecture of sophisticated AI systems, this role supports the strategic enhancement of T-Mobile's AI capabilities. Overall, the Assoc Engineer plays a key role in ensuring the reliability, accuracy, and efficiency of AI applications in customer service operations.

We pride ourselves on encouraging a culture of innovation, advocating for agile methodologies, and promoting transparency in all that we do. Join us in embodying the spirit of the 'Un-carrier' and make a tangible impact! Our team is dynamic where no day is the same, and we are diverse and inclusive passionate about growth and transformation.

Responsibilities

• Assist in building agentic AI systems that accomplish complex tasks by invoking Generative AI models as well as internal and third-party tools using APIs
• Support optimization of AI system performance through prompt engineering, fine-tuning, and reinforcement learning.
• Develop and maintain supporting software components, scripts, and pipelines to enable AI model deployment, testing, evaluation, and monitoring.
• Assist in implementing retrieval-augmented generation (RAG) techniques to ensure AI responses are contextually accurate and grounded in real-time data.
• Collaborate with senior AI engineers, backend engineers, business experts, and conversation designers to integrate AI-driven solutions into production environments.
• Stay up-to-date with latest LLM advancements in prompt design, few-shot learning, Tool integration protocols like MCP and AI orchestration frameworks like Agent SDK
• Help define and track success metrics aligned with business requirements and contribute to improving model quality.
• Participate in other duties or projects as assigned.

Knowledge, Skills, and Abilities

• Familiarity with LLM fine-tuning and prompt engineering (e.g., OpenAI APIs, Hugging Face, Anthropic Claude, Google Gemini).
• Exposure to AI orchestration tools such as LangChain, LlamaIndex, and vector databases for retrieval augmented generation.
• Basic knowledge of function calling and API-based reasoning models to support automated workflows.
• Proficiency in Python and willingness to learn AI development frameworks.
• Understanding of multi-agent systems and agentic AI concepts.
• Experience with AI evaluation techniques, including test sets, synthetic data generation, and interactive testing.
• Strong collaboration, communication, and problem-solving skills; ability to work with cross-functional teams.
• Familiarity with Agile development environments to facilitate rapid AI prototyping and iterations.

Preferred Knowledge, Skills, and Abilities

• Exposure to customer service AI applications and intent-driven automation.
• Familiarity with RAG pipelines and vector database retrieval concepts.
• Knowledge of AI middleware development and API integration basics.
• Awareness of cloud AI platforms (AWS, GCP, Azure) and scalable AI system architectures.

Education

• Bachelor’s degree in Computer Science, Artificial Intelligence, or a related field required.
• Master’s degree preferred but not mandatory.

• At least 18 years of age
• Legally authorized to work in the United States

Travel

Travel Required (Yes/No): No

DOT Regulated

DOT Regulated Position (Yes/No): No

Safety Sensitive Position (Yes/No): No

Base Pay Range: $80,900 - $146,100Corporate Bonus Target: 10%

The pay range above is the general base pay range for a successful candidate in the role. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. To find the pay range for this role based on hiring location, click here.

• Full and part-time employees have access to the same benefits when eligible.
• medical
• dental and vision insurance
• a flexible spending account
• 401(k)
• employee stock grants
• employee stock purchase plan
• paid time off
• up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually
• paid parental and family leave
• family building benefits
• back-up care
• enhanced family support
• childcare subsidy
• tuition assistance
• college coaching
• short- and long-term disability
• voluntary AD&D coverage
• voluntary accident coverage
• voluntary life insurance
• voluntary disability insurance
• voluntary long-term care insurance
• mobile service & home internet discounts
• pet insurance
• access to commuter and transit programs

Never stop growing! As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!

T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated.

Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing [e-mail] or calling 1-844-873-9500. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.

To learn about T-Mobile’s amazing benefits, check out www.t-mobilebenefits.com.