Senior ML Platform Engineer (Remote)

Block; Seattle (WA); Remote; USD 229,000 - 343,000; Full time

Job summary

Block is a remote-first technology company building for a more inclusive economy. We are seeking an experienced professional to join the ML Platform team, design and operate shared ML infrastructure, and shape our roadmap across models, deployment, and monitoring.

You will lead large-scale system designs, collaborate with applied ML teams, and mentor engineers while delivering reliable, scalable platform capabilities in a fast-paced environment.

Qualifications

• 8+ years of software development and/or ML experience focusing on internal platforms or infrastructure.
• Hands-on experience building ML infrastructure (feature stores, rules engines, model hosting/inference, or training infra).
• Deep understanding of ML lifecycle and architectures for ML-backed solutions.
• Experience designing and operating large-scale distributed systems.
• Experience operating mission-critical services with on-call and incident response.
• Experience leading complex technical work from unclear starting point through delivery.
• Experience mentoring engineers and collaborating with teams using the platform.
• Experience with major cloud vendors for high-scale production use cases.
• Strong communication skills with technical and non-technical stakeholders.
• Ruthless pragmatism solving new and unconventional problems.

Responsibilities

• Design, build, and operate shared ML infrastructure, including feature stores, rules engines, model hosting and inference, training infrastructure, and offline model evaluation.
• Lead the design and delivery of large-scale distributed systems, balancing response time, throughput, data consistency, availability, and cost.
• Work with applied machine learning teams and internal customers to understand their challenges, identify common needs, and turn them into reusable platform capabilities; use that feedback to help set our roadmap and priorities.
• Build reliable services through automated testing, monitoring, capacity planning and safe deployments.
• Participate in the oncall rotation for mission‑critical systems, lead incident response and reviews, and fix underlying causes to prevent repeat incidents and reduce manual support work.
• Build self‑service interfaces, libraries, tools, and documentation that help teams develop models, move them into production, and understand how they perform.
• Mentor engineers, guide design reviews, and share practices that help the team build and maintain reliable systems.

Skills

ML platform development

Distributed systems design

Cloud platforms

MLOps

On-call incident response

Tools

Kotlin/Java

Golang

Python

TypeScript

React

gRPC

Protobuf

AWS (Sagemaker, EC2, EKS, Dynamo)

Databricks

NVidia Triton

vLLM

ONNX

Job description

Block is a remote-first technology company building for a more inclusive economy. We are seeking an experienced professional to join the ML Platform team, design and operate shared ML infrastructure, and shape our roadmap across models, deployment, and monitoring.

You will lead large-scale system designs, collaborate with applied ML teams, and mentor engineers while delivering reliable, scalable platform capabilities in a fast-paced environment.