Full-Time

Machine Learning Operations Engineer

Posted on 7/17/2026

Deadline 8/17/26
Fractal

Fractal

1-10 employees

NFT marketplace for blockchain gaming assets

Compensation Overview

$120k - $140k/yr

+ Bonus

New York, NY, USA

In Person

Category
DevOps & Infrastructure (2)
,
Required Skills
RabbitMQ
Scikit-learn
Bash
Kubernetes
MLOps
FastAPI
Python
Airflow
GitHub Actions
PyTorch
Xgboost
Apache Spark
SQL
Apache Kafka
MLflow
Docker
Version Control
AWS
Jenkins
DevOps
Databricks
Celery

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Requirements
  • Deep hands-on Python experience for data engineering and application development, with comfort across SQL, PySpark, and shell scripting.
  • Production experience building services with FastAPI or a comparable Python web framework, including authentication, validation, error handling, and observability.
  • Experience building queue-based asynchronous processing systems using at least one of Kafka, RabbitMQ, Amazon Simple Queue Service, Redis Streams, Celery, or an equivalent technology, including retries, idempotency, back-pressure, and dead-letter queues.
  • Strong Docker and general containerization skills, with comfort using Kubernetes concepts.
  • Hands-on Databricks experience, including working knowledge of MLFlow and distributed computing in Spark.
  • Working experience with common machine-learning libraries such as scikit-learn, XGBoost, or PyTorch.
  • Strong understanding of the end-to-end machine-learning lifecycle and experience building or migrating feature-engineering code with an explicit focus on training, batch, and real-time parity.
  • Ability to read and refactor batch machine-learning or data-pipeline code while understanding its intent and edge cases before rewriting.
  • Experience with continuous integration and continuous delivery using Jenkins, GitHub Actions, or an equivalent; version-control workflows; and orchestration using Airflow, Prefect, or an equivalent.
  • Excellent written and verbal communication, with the ability to align data scientists, platform engineers, and business stakeholders without requiring a manager to broker every conversation.
Responsibilities
  • Design and build FastAPI services that expose models to downstream applications, including request and response contracts, authentication and authorization, input validation, error semantics, structured logging, tracing, and metrics.
  • Implement queue-based asynchronous serving for higher-latency or higher-throughput workloads, including producers and consumers, worker concurrency, retries and back-off, dead-letter handling, back-pressure, idempotency, and end-to-end request traceability across the pipeline.
  • Containerize services with Docker and deploy them for reliable scaling, rollout, and rollback.
  • Own data preprocessing, transformation, and feature-engineering code between raw sources and models, refactoring notebook- or script-style logic into modular, tested, reusable components.
  • Read existing code from prior batch solutions, understand its business logic and edge cases, and evolve it into target-state pipelines.
  • Build reproducible training and batch-inference pipelines on Databricks and PySpark from raw sources through curated feature and training datasets.
  • Manage model artifacts, versions, and promotion across environments so production runs are known and reproducible.
  • Ensure feature values match across training, batch scoring, and real-time serving, including consistent definitions, transformations, and edge-case handling.
  • Design feature-engineering code so one implementation, or a rigorously validated pair, serves offline Spark or batch and online low-latency Python paths while avoiding training and serving skew.
  • Establish parity checks and reconciliation between training data, batch outputs, and real-time predictions as a first-class pipeline capability.
  • Apply an end-to-end machine-learning-lifecycle perspective from data acquisition, preprocessing, and feature engineering through training, evaluation, deployment, monitoring, and retraining to make design trade-offs across batch and real-time solutions.
  • Implement monitoring for model performance, prediction drift, data quality, and pipeline health, with actionable alerts routed to the appropriate owners.
  • Diagnose production incidents in pipelines and services, identify root causes, and drive durable fixes through closure.
  • Apply software-engineering fundamentals, including testing, code review, continuous integration and continuous delivery, semantic versioning, and dependency hygiene, to machine-learning code.
  • Build and maintain shared libraries, utilities, and repository patterns that other machine-learning use cases can adopt.
  • Document pipelines, frameworks, and operational runbooks clearly enough for internal teams to assume ownership after the engagement ends.
  • Work closely with Data Science, Data Engineering, business partners, and IT teams to align requirements, handoffs, and production readiness.
Desired Qualifications
  • Prior experience working in group insurance or life insurance underwriting.
  • Experience operationalizing large-language-model-based systems, including inference serving, evaluation, and cost and latency controls.

Fractal.is operates a blockchain-based marketplace for gaming NFTs where developers can list games and in-game assets and players can buy, sell, and trade unique digital items. The platform supports minting and secondary sales of NFTs, with transactions generating revenue through commissions. It emphasizes community engagement through channels like Discord and Twitter to drive listing activity and user retention. Compared to others, Fractal.is specializes in the gaming sector, aggregating multiple games and assets under one marketplace, and focuses on building a connected metaverse ecosystem for developers and gamers. Its goal is to grow a active, trusted marketplace that enables true ownership of digital assets and vibrant participation in the gaming/NFT space.

Company Size

1-10

Company Stage

Seed

Total Funding

$35.2M

Headquarters

San Francisco, California

Founded

2021

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Simplify Jobs

Simplify's Take

What believers are saying

  • Docs updated January 2026 show active product maintenance and developer-facing API expansion.
  • Solana Wallet Adapter integration broadens distribution across apps already using Solana infrastructure.
  • Embedded transaction signing lowers developer friction, helping Fractal win launches from niche game studios.

What critics are saying

  • Fractal's marketplace still says Solana only; Ethereum and Polygon remain coming soon.
  • Web3 gaming demand remains fragile after 2022 NFT collapse, crushing transaction volumes quickly.
  • A security or wallet exploit would destroy developer trust and end Fractal's relevance.

What makes Fractal unique

  • Justin Kan's brand still attracts developers to Fractal's gaming wallet and marketplace.
  • Fractal's docs show Solana-only transaction signing and inventory tools built for game economies.
  • Fractal Studio bundles storefront, wallet, and marketplace APIs for embedded Web3 game commerce.

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Benefits

Generous PTO

Competitive Salary

401k Contributions

Company News

Dealflow
Oct 20th, 2024
Fractal raises $10m in funding

Renfe secured a €78 million contract, while Madrid-based Fractal raised $10 million led by Kayyak Ventures. Oakley Capital acquired a 70% stake in logistics software company Alerce, which has sales of around €12 million and EBITDA between €4 million and €5 million. Other funding news includes Shakers raising €6 million, Cocoon €2 million, and Kalma €1 million. Accenture acquired cybersecurity firm Innotec Security. Nauta led an €8.8 million Series A round in UK-based Spotted Zebra.

VentureBeat
Jun 6th, 2023
Fractal Unveils Fstudio Tools To Make Building Blockchain Games Easier

Missed the GamesBeat Summit excitement? Don't worry! Tune in now to catch all of the live and virtual sessions here. Justin Kan’s Fractal is unveiling FStudio, a set of tools that make it easier for game studios to build, market and monetize Web3 games without blockchain expertise.Kan, the cofounder of Twitch who started Fractal in 2021 to build tools for blockchain games, believes that blockchain tech is the best way to get to a player-driven economy. But he said the problem is the gaming industry has become obsessed with talking about that backend technology – turning off players and distracting Web3 startups from the main mission: creating excellent gameplay experiences. To move forward, we need to refocus the conversation on the players, not the tech, Kan said in an interview with GamesBeat.“In the last eight months or so, we’ve been working on a bunch of features that help empower the next wave of developers for Web3 gaming,” Kan said. “We call it FStudio. We’re solving the problems that we learned from talking to developers

Decrypt
Jun 6th, 2023
Twitch Co-Founder's Fractal Launches Tools to Help Devs Build NFT Games

Gaming-centric Web3 startup and NFT marketplace Fractal has announced Fractal Studio, or FStudio, a three-part product the firm says will enable video game developers to more easily add crypto integrations into their titles without having to code.

Tingbits
May 11th, 2023
Mojo Melee: Planet Mojo's Epic Autobattler Now Live on Fractal

Mojo Melee introduces a unique collaboration with Fractal in addition to the open beta qualifier.

Decrypt
Jan 24th, 2023
Twitch Co-Founder’s Solana Gaming Platform Fractal Expands to Polygon - Decrypt

Fractal co-founder Justin Kan tells Decrypt that many game developers "want to be on Polygon" as the platform expands.

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