Principal Software Engineer

FusionAuth

Principal Engineer leading identity architecture and development for CIAM software at FusionAuth. Engaging with enterprise customers and overseeing complex integration decisions with security and scalability in mind.

Posted 5/22/2026full-timeDenver • Colorado • 🇺🇸 United StatesLead💰 $225,000 - $270,000 per yearWebsite

Tech Stack

Tools & technologies

CloudDistributed SystemsJava

About the role

Key responsibilities & impact

Write, review, and own high-quality, secure production code on the FusionAuth core application
Provide leadership for the platform’s architectural evolution
Serve as a go-to expert on OAuth 2.x, OIDC, SCIM, and SAML
Engage directly with enterprise prospects and customers on architectural and integration design decisions
Track where the identity industry is heading and monitor broader technology trends
Represent FusionAuth at industry conferences, working groups, and community events
Factor FusionAuth’s diverse deployment targets into every architectural and feature decision
Mentor engineers across the team

Requirements

What you’ll need

Bachelor’s degree in Computer Science or equivalent demonstrable technical depth
Production-grade expertise in OAuth 2.x, OIDC, SCIM, and SAML
12+ years of professional software engineering, including 5+ years focused on identity, authentication, or security, with meaningful time at the principal, staff, or architect level
Proven track record of shipping code alongside architectural responsibilities
Experience with enterprise-grade, highly available, high-performance distributed systems
Experience designing or supporting software deployed across self-hosted, on-premise, or dedicated cloud environments
Demonstrated ability to engage directly with enterprise customers and prospects on technical design and architecture
Experience reviewing and approving technical designs in a formal or informal architecture review capacity
Familiarity with emerging identity protocols and standards
Willingness to adopt and use AI-assisted development tools (e.g., Claude Code, GitHub Copilot)
Strong Java skills

Benefits

Comp & perks

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

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

JavaOAuth 2.xOIDCSCIMSAMLsoftware engineeringdistributed systemsarchitectural designAI-assisted development toolsproduction code

Soft Skills

leadershipmentoringcustomer engagementcommunicationtechnical design review

Certifications

Bachelor’s degree in Computer Science