Senior ML Engineer (Applied AI)

Ninetwothree Ai Studio; Spain (TX); Remote; USD 150,000 - 190,000; Full time

Benefits offered by this job

Remote work

Job summary

NineTwoThree AI Studio is hiring a Senior ML Engineer for production-grade ML/NLP systems. The role focuses on designing, optimizing, and deploying robust LLM-based solutions for diverse clients and industries.

You will own features end-to-end, from prototyping to production, collaborating with a global team and contributing to scalable AI products.

Qualifications

• Experience shipping production ML/NLP systems
• Strong understanding of end-to-end ML lifecycle
• Ability to design, optimize and deploy robust LLM-based solutions

Responsibilities

• Own features from prototype to production delivery
• Collaborate with clients to integrate AI solutions
• Mentor junior engineers and contribute to code quality

Skills

ML engineering

NLP

LLM deployment

production software

Tools

OpenAI API

Anthropic Claude

Job description

100% remote | Global team | Full-time

NineTwoThree AI Studio is a premier product design, engineering, and marketing firm specializing in custom AI, web, and mobile applications for established brands and funded startups. We are based in Massachusetts but with an American and European staff and a strong, collaborative remote culture.

We’re a team that loves doing good work with great people. Our relatively small size keeps us fast and nimble. The wealth of knowledge, experience and talent paired with proven recipes and best practices allows us to find opportunities to help new products succeed.

With a portfolio of over 150 launched products over 13 years, NineTwoThree has garnered recognition as a top AI agency in the U.S., earning accolades such as inclusion in the Inc. 5000 list for four consecutive years and being named among the top 50 AI firms alongside industry leaders like Microsoft, NVIDIA, and IBM. We’ve built AI and ML tech for big brands like Consumer Reports, FanDuel, and Nara, as well as startups in legal tech, logistics, education, and more.

Role Overview

As a Senior ML Engineer at NineTwoThree AI Studio, you will sit at the intersection of production‑grade software engineering, advanced natural language processing, and client delivery. We build custom, high‑impact AI systems for brands and startups across diverse industries (such as healthcare, logistics, and fintech).

Instead of siloed academic research, this role demands a product‑minded builder. You will design, optimize, and deploy robust LLM applications, custom predictive analytics, and agentic workflows directly into our clients' software ecosystems, taking absolute ownership of features from prototype to production.

Technology Stack

• Core Frameworks & Arch: Transformer models, modern LLM APIs (Anthropic Claude, OpenAI