Job Details

Overview

Senior Software Engineer, Machine Learning – join to apply for the Senior Software Engineer, Machine Learning role at Persona. Persona is the configurable identity platform built for businesses in a digital-first world.

About Persona

Persona is the configurable identity platform built for businesses in a digital-first world. Verifying individuals and organizations is harder — but more important — than ever, with AI enabling fraudsters to launch sophisticated accounts at scale and regulations evolving rapidly. Persona supports a wide range of use cases and industries. We serve leading companies, for example Coursera uses Persona to ensure the right person is earning each degree, and OpenAI relies on Persona to keep bad actors out and protect AI platforms from large-scale abuse.

We believe that making the internet safer and more human requires a diverse, global team. We're growing rapidly and looking for exceptional people to join us.

Role

We're building both a product and a technology, and we prioritize acting in a customer-centric way. In this role, you'll tackle challenging machine learning problems to balance the evolving compliance requirements of our customer base, ranging from small startups to Fortune 10 companies. You'll develop and optimize machine learning models, contribute to cutting-edge research in generative AI and deepfake detection, and build seamless user experiences that impact the Persona product long term.

Responsibilities

• Architect and manage embedding storage and vector search solutions (e.g., ClickHouse, Pinecone) for low-latency similarity queries.
• Build and maintain reproducible data pipelines (batch/stream) that vectorize text and images, with quality checks and monitoring.
• Implement CI/CD for model artifacts and infrastructure-as-code, supporting containerized deployments on Kubernetes or serverless platforms.
• Develop and execute end-to-end model testing (unit, integration, performance) with versioning and rollback capabilities.
• Monitor model performance and infra health (accuracy drift, latency, resource usage) with alerting via Prometheus/Grafana or similar.
• Optimize query and system performance through index tuning, capacity planning, and cost-efficient resource allocation.
• Collaborate with data scientists, engineers, and customers to integrate, scale, and customize ML solutions from startup pilots to enterprise-scale events.

Qualifications

• Product-thinker: You build machine learning solutions that maximize product value while minimizing complexity. You understand and can resolve tensions between product requirements and engineering design for large-scale ML projects.
• Innovative mindset: You go beyond implementing what is tasked and suggest new algorithms and models that help push our product forward. You are naturally curious and embrace change.
• Expertise in ML techniques: Strong foundation in machine learning algorithms, deep learning, and computer vision. Stay updated with the latest research and apply it to real-world problems.
• Independent thinking: You learn quickly and know how to unblock yourself when needed. You take initiative to tackle new problems and drive them to impactful solutions.
• Collaborative spirit: You value collaboration and leverage diverse perspectives to get the job done.

Nice to have

• 5+ years of experience as a machine learning engineer or related role
• Experience with large language models (LLMs) and natural language processing
• Proficiency in training and tuning vision models like YOLO or CLIP
• Familiarity with generative AI and deepfake detection technologies
• Experience with ML frameworks such as TensorFlow or PyTorch
• Background in computer vision, natural language processing, or related fields
• Knowledge of cloud platforms and services related to ML deployments

Benefits and Perks

Persona offers medical, dental, and vision benefits, 401(k) contribution, unlimited PTO, quarterly mental health days, family planning benefits, professional development stipends, wellness benefits, and other competitive benefits. Glassdoor reviews available for insight into working at Persona.

Diversity, equity, inclusion and belonging

Persona strives to promote diversity and inclusion in all aspects of our work. Our DEIB Employee Resource Group supports a diverse and inclusive team where everyone can contribute their unique perspectives.

Additional details

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Job function: Engineering and Information Technology
• Industries: Software Development