Senior AI/ML Engineer - SLM Optimization & Inference

Concentrix Experts Colombia S.A.S.; United States; On-site; USD 145,000 - 171,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Employee assistance program

Job summary

Concentrix Experts Colombia S.A.S. seeks a Senior AI/ML Engineer to fine-tune Alibaba Qwen models and deploy production-grade inference with optimized GPU usage. You’ll improve latency, throughput, and model quality while contributing to real-time audio intelligence pipelines.

The role involves hands-on model training, deployment, and collaboration with cross-functional teams to balance performance with infrastructure efficiency. Strong PyTorch/Transformers and PEFT expertise are essential.

Qualifications

• Proficient in PyTorch, Transformers, and PEFT techniques (LoRA/QLoRA).
• Hands-on experience with high-performance model inference frameworks like vLLM or SGLang.

Responsibilities

• Fine-tune and optimize Small Language Models, especially Alibaba Qwen variants.
• Improve metrics: accuracy, precision, recall, latency, throughput.
• Optimize model serving with vLLM/SGLang; manage GPU memory and KV caches.
• Implement advanced inference optimization: quantization, batching, memory usage.
• Develop real-time audio intelligence pipelines for low-latency processing.
• Benchmark, profile, and tune for production-scale deployment.
• Collaborate with engineering/data teams to fix bottlenecks.
• Build scalable ML workflows for high-throughput AI apps.
• Exercise senior-level judgment balancing quality and production needs.

Skills

PyTorch

Hugging Face Transformers

LoRA

QLoRA

PEFT

vLLM

SGLang

CUDA

KV caching

GPU memory optimization

Python

Tools

PyTorch

Hugging Face Transformers

vLLM

SGLang

LoRA

QLoRA

PEFT

CUDA

KV caching

Job description

Job Title: Senior AI/ML Engineer - SLM Optimization & Inference

Job Description

We're Concentrix. The intelligent transformation partner. Solution-focused. Tech-powered. Intelligence-fueled. The global technology and services leader that powers the world's best brands, today and into the future. We're solution-focused, tech-powered, intelligence-fueled. With unique data and insights, deep industry expertise, and advanced technology solutions, we're the intelligent transformation partner that powers a world that works, helping companies become refreshingly simple to work, interact, and transact with. We shape new game-changing careers in over 70 countries, attracting the best talent.

The Concentrix Technical Products and Services team is the driving force behind Concentrix's transformation, data, and technology services. We integrate world-class digital engineering, creativity, and a deep understanding of human behavior to find and unlock value through tech-powered and intelligence-fueled experiences. We combine human-centered design, powerful data, and strong tech to accelerate transformation at scale. You will be surrounded by the best in the world providing market leading technology and insights to modernize and simplify the customer experience. Within our professional services team, you will deliver strategic consulting, design, advisory services, market research, and contact center analytics that deliver insights to improve outcomes and value for our clients. Hence achieving our vision.

Our game-changers around the world have devoted their careers to ensuring every relationship is exceptional. And we're proud to be recognized with awards such as "World's Best Workplaces," "Best Companies for Career Growth," and "Best Company Culture," year after year.

Join us and be part of this journey towards greater opportunities and brighter futures.

Position Summary

Senior AI/ML Engineer - SLM Optimization & Inference

We are looking for a hands-on Senior AI/ML Engineer to fine-tune, optimize, and deploy Small Language Models, with a focus on Alibaba Qwen models and production-ready inference performance. In this role, you will help improve model quality, latency, throughput, and GPU efficiency while contributing to real-time audio intelligence pipelines for high-performance, low-latency applications.

This is an opportunity for a senior-level AI/ML engineer who enjoys working close to the model, the infrastructure, and the performance benchmarks-building scalable ML systems that are ready for production.

Responsibilities

• Fine-tune and optimize Small Language Models, particularly Alibaba Qwen models, for domain-specific use cases.
• Improve model performance across key metrics, including accuracy, precision, recall, latency, and inference throughput.
• Optimize model serving using vLLM, SGLang, or similar high-performance inference engines.
• Implement advanced inference optimization techniques, including GPU memory optimization, KV-cache management, quantization, and efficient batching.
• Develop, enhance, and optimize real-time audio intelligence pipelines for low-latency processing.
• Benchmark, profile, and tune models for production-scale deployment.
• Collaborate with engineering and data teams to evaluate model behavior, identify bottlenecks, and improve end-to-end ML system performance.
• Build reliable, scalable ML workflows that support high-throughput, low-latency AI applications.
• Apply senior-level technical judgment to balance model quality, infrastructure efficiency, and production performance requirements.

Qualifications

• Strong hands-on experience with PyTorch, Hugging Face Transformers, and LLM/SLM fine-tuning techniques such as LoRA, QLoRA, and PEFT.
• Practical experience using vLLM or SGLang for high-performance model inference.
• Deep understanding of GPU utilization, CUDA fundamentals, KV caching, and memory optimization.
• Experience evaluating and improving model precision, recall, latency, throughput, and inference performance.
• Strong Python programming and ML engineering skills.
• Proven ability to benchmark, debug, and optimize models for production environments.
• Experience fine-tuning and deploying Alibaba Qwen models is preferred.
• Experience with real-time audio AI, speech recognition, ASR, or audio classification is preferred.
• Experience optimizing AI models for high-throughput, low-latency production environments is preferred.
• Ability to work hands-on across both SLM model training/fine-tuning and GPU inference optimization.
• Strong collaboration skills with the ability to partner effectively across engineering and data teams.

The base salary for this position is $ 144,964-$ 171,321 plus incentives that align with individual and company performance. Actual salaries will vary based on work location, qualifications, skills, education, experience, and competencies. Benefits available to eligible employees in this role include medical, dental, and vision insurance, comprehensive employee assistance prog