Sr. Backend Software Engineer (Infrastructure ML Ops)

Philo; San Francisco (CA); On-site; USD 170,000 - 250,000; Full time

Job summary

Philo is seeking an enthusiastic Infrastructure MLOps Software Engineer to help build and improve ML infrastructure across the company. You’ll contribute to serving models for real-time recommendations and LLM workloads, while advancing our cloud-based platform and observability.

The role emphasizes scalable infrastructure, GPU/accelerator management on Kubernetes, and close collaboration with engineering teams to ship reliable ML systems. Philo values pragmatism and collaboration.

Qualifications

• 8+ years of software and infrastructure experience.
• 4+ years building ML systems at scale (training and inference).
• Experience with distributed systems and microservices architecture.
• Linux and Docker environments proficiency.
• Cloud experience with AWS or GCP and services like CloudWatch, RDS, VPC.

Responsibilities

• Manage core Philo infrastructure focusing on ML/LLM workloads.
• Design, build, and maintain cloud components (AWS, Kubernetes).
• Scale model serving and inference infra for real-time recommendations and LLM workloads.
• Manage GPU and accelerator infra on Kubernetes; optimize costs.
• Build monitoring and observability for system health and model performance.
• Develop CI/CD pipelines to test and deploy code.
• Promote IaC practices and collaborate with other engineers.

Skills

8+ years exp

Distributed systems

Kubernetes

Golang

Cloud computing

Education

BS in CS or related

Tools

Docker

Terraform

Prometheus

MLflow

Job description

At Philo, we’re a group of technology and product people who set out to build the future of television, marrying the best in modern technology with the most compelling medium ever invented — in short, we’re building the TV experience that we’ve always wanted for ourselves. In practice this means leveraging cloud delivery, modern tech stacks, machine learning, and hand-crafted native app experiences on all of our platforms. We aim to deliver a rock solid experience on the streaming basics, while cooking up next generation multi-screen and multi-user playback experiences.

Senior Backend Software Engineer (Infrastructure MLOps)

The infrastructure team at Philo builds the foundation for a 24/7 live and on-demand streaming product serving video to our growing subscriber base. It provides a platform that enables groups across the company – such as video delivery, product, support, and analytics – to do their best work easily and smoothly. Our systems are highly distributed, horizontally scalable and run in the cloud on Kubernetes. We continuously test and deploy our code and closely monitor the health and performance of our production environment.

We are seeking an enthusiastic Infrastructure MLOps Software Engineer to help us build and improve the ML infrastructure at Philo. We are building out ML and LLM infrastructure and this role will be pivotal in setting direction, adopting best practices, and shipping infrastructure that will be used across the company.

As a sample, the ML infrastructure supports teams like Discovery in building content recommendation models that will help our users find more favorite shows from the large Philo catalog. The engineering team is designing and developing our own agent harnesses to support coding and empowering everyone at the company to get answers across our code bases, analytics, logs, and communication tools. The video player team is using LLMs to classify ads and label our video catalog so that users have a better experience. You’ll build the serving, evaluation and platform infrastructure that these workloads depend on.

Responsibilities

• Manage the core infrastructure at Philo with a focus on supporting ML and LLM workloads. This infrastructure is relied on by a large subscriber base of Philo’s product as well as internal stakeholders across the company.
• Design, build, and maintain cloud infrastructure components (AWS and Kubernetes) using a combination of in-house technology and open source software.
• Build and scale model serving and inference infrastructure for both real-time recommendation models and LLM workloads — including model servers (e.g. NVIDIA Triton), LLM inference engines (e.g. vLLM, TGI, TensorRT-LLM), autoscaling, and latency/throughput optimization.
• Manage GPU and accelerator infrastructure on Kubernetes — scheduling, capacity and quota management, and cost optimization across on-demand and spot capacity.
• Design, build, and maintain monitoring and observability systems — spanning both system health and model quality (drift, evaluation, and online performance) — that enable Philo engineers and the support team to gain insight and to discover and debug issues.
• Build and operate model evaluation infrastructure: offline and online eval pipelines, golden/regression datasets, LLM-as-judge harnesses, A/B testing and experimentation, and feedback/ground-truth loops
• Design, build, and maintain CI/CD systems enabling Philo engineers to create pipelines to test and deploy their code.
• Establish tools, methods and best practices for other Philo engineers interfacing with the Philo ML infrastructure. Ensure reliability, security, and scalability of the Philo platform. Promote Infrastructure as Code.
• Work closely with other Philo engineers to deploy and instrument software systems.
• Drive evaluation, selection, and integration of third-party vendor systems and work closely with vendors to configure and manage them.

Qualifications

• 8+ years of software development and infrastructure management experience.
• 4+ years of experience developing and deploying ML systems at scale across training and inference
• Experience working with distributed systems and an understanding of microservices architecture principles.
• Experience with Linux and containerized (i.e. Docker) environments.
• Experience managing cloud computing environments (AWS or GCP) and configuring cloud services e.g. CloudWatch, Route 53, RDS, ElastiCache, SQS, ALB/NLB/ELB, VPC networking, IAM security.
• Experience with container orchestration platforms (i.e. Kubernetes), and familiarity with running GPU/accelerated workloads on them (e.g. NVIDIA device plugin, MIG, timeslicing).
• Strong understanding of networking and internet application protocols including, but not limited to TCP/IP, DNS, and HTTP.
• Strong understanding of network and application security principles and best practices.
• Familiarity or hands-on experience with configuration management systems and Infrastructure as Code (e.g. Terraform, CloudFormation).
• Familiarity or hands-on experience with Monitoring/Observability systems (e.g. Prometheus, Grafana, TICK/InfluxDB, Fluentd, ELK, Datadog).
• Familiarity or hands‑on experience with CI/CD automation systems e.g. Jenkins, Gitlab.
• Experience with relational and non-relational databases and familiarity with modern data warehousing and querying.
• Proficient in writing, testing, and profiling software in Golang, JavaScript/TypeScript, C++, Ruby, Python or similar programming languages.
• Experience and aptitude for collaborating and communicating with internal and external stakeholders in both business and technical roles.

A strong candidate may also have one or more of these:

• Hands-on experience optimizing inference — dynamic/continuous batching, quantization, KV-cache management, or GPU memory tuning — for low-latency or highthroughput serving.
• Experience with ML platform tooling: model registry and experiment tracking (e.g. MLflow, Weights & Biases), feature stores (e.g. Feast, Tecton), and pipeline/workflow orchestration (e.g. Airflow, Dagster, Kubeflow, Ray, Metaflow).
• Experience building model evaluation, monitoring, or experimentation systems — including drift detection, LLM-as-judge, or A/B testing for models.
• Experience with LLMOps: inference gateways/routers (e.g. LiteLLM), hosted model APIs (Bedrock, OpenAI, Anthropic), RAG pipelines, vector databases (e.g. pgvector, Pinecone, Weaviate), and prompt/version management.
• Experience building or operating agent harnesses or tool-using LLM applications in production.
• Experience with data and model versioning (e.g. DVC, LakeFS) and data/labeling pipelines.
• Experience with cost management / FinOps for GPU and inference workloads

We are language agnostic, but most of our backend code is written in Golang, Ruby and TypeScript, with some C++ and Python. Our services run on Kubernetes, and we practice continuous deployment across all of our systems.

More About Philo

At Philo, we’re a company that puts people first—both our subscribers and our team. We empower our colleagues to do their best work while supporting one another in pursuing shared goals. We value pragmatism, pride in our work, and passion, with transparency and openness as fundamental parts of our culture.

We’re committed to diversity, equity, inclusion, and accessibility as we grow the Philo team and shape the future of TV. We believe that a diverse range of voices and perspectives enables us to innovate faster and create the best experiences for our subscribers. Philo is proud to be an Equal Opportunity Employer. We’re committed to supporting every candidate and employee. If you need an accommodation at any stage of the process, please email [e-mail] and we’ll work with you to meet your needs.

Philo offers 70+ top-rated networks, including AMC, BET, CMT, Comedy Central, Discovery Channel, Food Network, Hallmark Channel, HGTV, HISTORY, Investigation Discovery, Lifetime, MTV, Nickelodeon, OWN, VH1, We TV, and more. It also includes all the groundbreaking originals and blockbuster movies available with AMC+ and access to HBO Max Basic With Ads and discovery+. Our service also includes 100+ free channels and premium add-ons like STARZ and MGM+.

Our extensive library boasts over 85,000 titles, and our unlimited DVR allows users to save their favorite shows and movies for up to a year, skipping ads for a seamless viewing experience. Stream on up to three devices simultaneously, whether on your phone, tablet, laptop, or TV using Roku, Apple TV, Fire TV, Samsung TV, Android