Senior Software Engineer

Pax8

. Build backend services that matter — design, develop, test, deploy, and support core billing and invoicing workflows that run at scale.

Posted 5/7/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $170,000 - $185,000 per yearWebsite

Tech Stack

Tools & technologies

JavaMicroservicesSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Build backend services that matter — design, develop, test, deploy, and support core billing and invoicing workflows that run at scale.
Own complex problems end-to-end — from shaping a solution to shipping it safely, monitoring it in production, and continuously improving it.
Modernize the platform — help drive legacy-to-microservices migration to improve scalability, deplorability, and maintainability.
Partner across the business — collaborate closely with engineers, product partners, and adjacent teams to land outcomes that solve real problems.
Lead through craft and clarity — contribute to design and code reviews, share patterns, and mentor teammates to raise quality and consistency.
Join the on-call rotation — with increased responsibility during monthly billing runs and lighter coverage outside billing windows.
Use AI responsibly to accelerate delivery — leverage modern AI tools to speed up scaffolding, refactoring, documentation, and throughput while owning correctness, performance, and maintainability.

Requirements

What you’ll need

Substantial backend engineering experience, ideally building services in Java with Spring/Spring Boot in production environments.
Proven ability to design and ship microservices and work effectively with distributed, highly available systems.
Confidence navigating large, evolving codebases — refactoring safely, reducing risk, and improving systems incrementally.
Strong engineering judgement around quality, testing strategy, reliability, and operational readiness.
A collaborative mindset — you can mentor others, give constructive feedback, and influence through clarity and example.
Comfort operating in ambiguity and making progress when the path forward isn’t perfectly defined.
A pragmatic approach to AI-enabled tooling — you use it to accelerate real delivery (not as a substitute for fundamentals), and you take full ownership of what ships.
Willingness to participate in on-call rotations and support critical billing windows with calm, focused execution.

Benefits

Comp & perks

Non-Commissioned Bonus Plans or Variable Commission
401(k) plan with employer match
Medical, Dental & Vision Insurance
Employee Assistance Program
Employer Paid Short & Long Term Disability, Life and AD&D Insurance
Flexible, Open Vacation
Paid Sick Time Off
Extended Leave for Life events
RTD Eco Pass (For local Colorado Employees)
Career Development Programs
Stock Option Eligibility
Employee-led Resource Groups

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

JavaSpringSpring Bootmicroservicesbackend engineeringtesting strategyrefactoringscalabilitydeployabilityoperational readiness

Soft Skills

collaborationmentoringconstructive feedbackinfluenceengineering judgementcomfort in ambiguitypragmatic approachcalm executionproblem-solvingquality assurance