Senior Java Engineer - Cloud Platform

FusionAuth•Denver, CO

1d•$170,000 - $200,000•Hybrid

About The Position

FusionAuth is a fast-growing startup and leading provider of customer identity and access management (CIAM) software headquartered in Denver, Colorado. Our mission is to make authentication and authorization simple and secure for every developer. Our product helps businesses securely manage customer identities and access, ensuring a seamless and safe user experience for some of the largest brands in the world. We are committed to delivering exceptional value and satisfaction to our clients through top-notch service and support. With a great team and strong investors, we are expanding our team to help accelerate our growth and take FusionAuth to the next level. We are recruiting a Senior Software Engineer who will join our engineering team to help us achieve these goals. This exciting role will allow you to build new features and extend and influence our existing product offering. While you'll be expected to contribute in all areas of the product, this role will have a strong emphasis on working on the FusionAuth cloud platform. For this role, you must be a creative and quantitative thinker. You should be interested in the authentication, authorization and user management space. You should be seasoned at writing secure and high-performance code. The ideal candidate will be a self-starter, fast worker and excited about growing a company from the ground up. This position reports to the Head of our Platform Engineering Team.

Requirements

10+ years of professional software development experience
6+ years of experience with a heavy ops or platform engineering component
Highly proficient in the Java programming language
Bachelor's degree in computer science, or demonstrable experience with a broad set of theoretical topics
Highly proficient in object-oriented design and implementation
Deep, hands-on experience with AWS — you're comfortable across a wide range of services and deployment models
Strong platform engineering experience in a Linux environment
Experience architecting, building, and managing complex application topologies on Kubernetes
Experience with infrastructure-as-code tools, particularly Terraform
Experience with building highly available, high-performance, scalable applications
Expertise in building multi-threaded, API-first applications
In-depth knowledge of unit and integration testing
Comfortable using AI tools like Opencode or Claude Code in development workflow
Real working knowledge of relational databases — you understand query optimization, indexing strategies, and database design beyond ORM abstractions
Experience up and down the entire stack, including cloud infrastructure, operating systems, databases, back-end services, and JavaScript on the front end
Located in the Denver metropolitan area with the ability to come into our Westminster office 2-3 times per week

Nice To Haves

Strong quantitative and data-driven approach to solving problems
Passion for security in general, and auth specifically
Quick learner with the ability to rapidly master new technologies and skills
Influential communicator: holds strong opinions but adapts flexibly to new information or team input
Appreciates first principles thinking, but understands when it's time to stop theorizing and start building
Comfortable and passionate about working in open-source environments
Adaptable to challenges common in a startup with ~50 employees
Enjoys and thrives in a dynamic startup vibe

Responsibilities

Writing high-quality, performant, and secure Java code
Connect unfamiliar technical concepts to your existing knowledge base and find pragmatic paths forward
Balance immediate deliverables with long-term architectural thinking and planning
Writing extensive and thorough tests
Extending our cloud offering with security, scalability, and control plane features
Helping to maintain and extend the FusionAuth Terraform provider
Supporting other engineers with your cloud and platform expertise
Writing clear, high-quality documentation for new features
Participating in the on-call engineer rotation, solving critical customer issues should they arise. While not the norm, we do have some off-hours support requirements.
Provide technical support to our customers
Be a voice of positive change in the Engineering organization

Benefits

Comprehensive health insurance including medical, dental, and vision coverage, with the company covering the majority of your medical premiums to keep your costs low
Fully employer-paid High Deductible Health Plan (HDHP) option paired with a Health Savings Account (HSA), including employer contributions
Basic life insurance and short- and long-term disability coverage fully paid by the company for essential financial protection
Voluntary life insurance options to provide additional financial protection for you and your loved ones
Healthcare and Dependent Care Flexible Spending Accounts (FSAs) to save pre-tax dollars on eligible expenses
401(k) plan with company match to help you save for retirement
Generous paid time off (PTO) plus paid company holidays to support work-life balance
Employee Assistance Program (EAP) offering confidential counseling and support services
Professional growth and development opportunities to boost your career journey
Eligibility for performance-based bonuses or variable compensation tied to individual, team, or company results