Full Stack Engineer

Unit21, Inc.; San Francisco (CA); On-site; USD 160,000 - 200,000; Full time

Benefits offered by this job

Company-paid health insurance

Unlimited PTO

401(k) with stipend

Home office setup support

Job summary

Unit21 is seeking a full stack engineer who is passionate about catching fraud and designing AI-powered systems. You will design high-performance automation, build scalable features, and work with product/design to improve user experiences in a distributed environment.

The role requires 3+ years in Python/Go/Rust and React with Material UI, plus hands-on experience with AWS and Terraform. You will contribute to end-to-end data flows and robust APIs for complex fraud scenarios.

Qualifications

• BS, MS or Ph.D in Computer Science, Engineering, Mathematics, Statistics, Physics, or related field is required.
• 3+ years of experience in Python/Go/Rust.
• 3+ years of experience with React and Material UI.
• Experience in building and managing distributed systems.
• Experience with AWS and Terraform.
• Experience in developing and optimizing end-to-end APIs, data-flows, SQL queries and infrastructure for consumer or enterprise products.
• Advanced knowledge of software engineering principles including software design, source control management, build processes, automated deployments, code reviews, testing methods.

Responsibilities

• Design and build high-performance automation and AI systems with intuitive user interfaces prioritizing scalability, reliability, and efficiency.
• Lead projects from start to completion.
• Collaborate with product and design to refine user experiences.
• Reviewing pull requests, internal and external to team.
• Innovating on creative solutions to difficult problems.
• Work with related data infrastructure technologies.
• Building new features to help our customer detect ever changing complex fraud scheme.
• Developing and deploying efficient and elegant code.

Skills

Python

Go

Rust

React

Material UI

Distributed systems

APIs

SQL queries

AWS

Terraform

Education

BS/MS/PhD in CS/Engineering/Math/Stats/Physics

Tools

Databricks

Apache Spark

Job description

Job Description

About the role

We are looking for a full stack engineer who is passionate about catching fraud. We build AI products that help our customers detect fraud and keep their customers money safe. This requires careful thought, high creativity, and a deep understanding of complex systems.

What you will be doing

• Design and build high-performance automation and AI systems with intuitive user interfaces prioritizing scalability, reliability, and efficiency.
• Lead projects from start to completion
• Collaborate with product and design to refine user experiences
• Reviewing pull requests, internal and external to team
• Innovating on creative solutions to difficult problems
• Work with related data infrastructure technologies
• Building new features to help our customer detect ever changing complex fraud scheme
• Developing and deploying efficient and elegant code

What we’re looking for

• BS, MS or Ph.D in Computer Science, Engineering, Mathematics, Statistics, Physics, or related field is required.
• 3+ years of experience in Python/Go/Rust.
• 3+ years of experience with React and Material UI
• Experience in building and managing distributed systems.
• Experience with AWS and Terraform
• Experience in developing and optimizing end-to-end APIs, data-flows, SQL queries and infrastructure for consumer or enterprise products.
• Advanced knowledge of software engineering principles including software design, source control management, build processes, automated deployments, code reviews, testing methods.

Bonus Points!

• Experience managing large-scale critical production systems with minimum SLAs of 4 9's
• Experience with Databricks or Apache Spark
• Experience with building and deploying RAG pipelines
• Experience with securing MCP

Work Location

Compensation

• The standard base pay range for this role is $160,000 - $200,000 annually. This range does not include bonuses, equity, or other incentives.

What We Offer

• Competitive salary and pre-IPO equity
• 100% company-paid medical, dental, and vision insurance (employee)
• Unlimited PTO and generous leave programs
• 401(k), learning & development stipend, and home office setup support
• Inclusive, high-ownership culture focused on impact, innovation, and growth

Unit21 is an equal opportunity employer. We encourage candidates to apply even if they do not meet every listed requirement. We are committed to building a diverse, inclusive workforce.