Senior Software Engineer, Billing & Financial Systems

Location: Remote (United States)

Department: Software Engineering

About your new role:

We’re looking for a Senior Software Engineer to lead the modernization of CommandLink’s billing, license management, and financial systems—the backbone of our fast-growing SaaS enterprise. This isn’t about incremental feature work. It’s about transforming a legacy, monolithic PHP environment into a resilient, service-oriented architecture that powers accurate billing, license enforcement, accounting, and historical financial reporting—at scale, without disrupting the business.

You’ll set the technical direction, architect migration strategies, and lead engineering execution to ensure we deliver a modern, global-ready financial platform that’s bulletproof in accuracy, compliance, and scalability. Your work directly impacts revenue operations, customer trust, and the speed at which we can innovate. Billing, licensing, and accounting aren’t back-office functions—they are the system of record for how value flows through our business. Getting this right means we can scale confidently, innovate faster, and maintain absolute trust with customers and partners.

If you want to own the modernization of a critical financial platform at a company already at massive scale and still growing fast—this is the role.

Key Responsibilities:

• Architect the Future State: Design a modular, service-driven financial platform—billing, license management, and accounting—that can evolve with the business.
• Lead Legacy-to-Modern Migration: Define and execute pragmatic migration strategies that move us from a fragile monolith to a modern stack—without breaking existing operations.
• Build Scalable Billing Services: Own the architecture for invoicing, payments, reconciliations, and revenue recognition that must be precise, reliable, and auditable.
• Integrate with Global Financial Systems: Architect integrations with ERP, payment gateways, and accounting platforms (NetSuite, QuickBooks, Stripe, Zuora, Chargebee, etc.).
• Guarantee Data Integrity: Engineer for consistency, reconciliation, and historical accuracy across complex transactional systems.
• Set Standards: Drive observability, performance, and security across all financial services.
• Cross-Functional Leadership: Work directly with Finance, Product, and Operations to ensure technology aligns with compliance, business velocity, and customer impact.

What you'll need for success:

• Deep Engineering Experience: 10+ years building and scaling backend systems with strong fundamentals in transactional integrity, distributed systems, and service architectures.
• Proven Modernization Track Record: Hands-on experience decomposing legacy systems (especially PHP-based) into modern service platforms.
• Integration Mastery: Strong history integrating with ERP, accounting, and payment systems (NetSuite expertise highly valued).
• Architect at Scale: Skilled at building high-volume, high-accuracy financial systems with global reach.
• Security & Compliance: Solid knowledge of PCI, SOC2, GDPR, authentication protocols (OAuth 2.0, HMAC, mTLS), and data handling best practices.
• Cloud-Native Mindset: Experience architecting and deploying in Azure (preferred), AWS, or GCP.
• Leadership Without Bureaucracy: Able to guide teams, influence executives, and align cross-functional priorities without slowing execution.

Why you'll love life at Command|Link

Join us at CommandLink, where you'll have the opportunity to shape the future of business communication. We value the innovative spirit and seek individuals ready to bring their unique vision and expertise to a team that values bold ideas and strategic thinking. Are you ready to make an impact?

• Room to grow at a high-growth company
• An environment that celebrates ideas and innovation
• Your work will have a tangible impact
• Generous Medical, Dental, and Vision coverage for full-time employees
• Flexible time off  
• 401k to help you save for the future
• Fun events at cool locations
• Free DoorDash lunches on Fridays
• Employee referral bonuses to encourage the addition of great new people to the team

Commandlink hires individuals in a number of geographic regions and the pay ranges listed reflect the cost of labor across these regions. The base pay for this position as displayed at the bottom of the job description is a range based on our lowest geographic region, up to our highest geographic region. Pay is based on location among other factors, such as skill-set, experience, and qualifications held.

At CommandLink, we’re committed to creating a fair, consistent, and efficient hiring experience. As part of our process, we use AI-assisted tools to help review and analyze applications. These tools support our recruiting team by identifying qualifications and experience that align with the requirements of each role.

AI tools are used only to assist in the evaluation process — they do not make final hiring decisions. Every application is reviewed by a member of our recruiting or hiring team before any decisions are made.

About the Company

About Command|Link

Command|Link is a global SaaS Platform providing network, voice services, and IT security solutions, helping corporations consolidate their core infrastructure into a single vendor and layering on a proprietary single pane of glass platform. Command|Link has revolutionized the IT industry by tackling the problems our competitors create. In recognition for our unprecedented innovation and dedication, Command|Link was recognized as the SD-WAN Product of the Year, ITSM Visionary Spotlight, UCaaS Product of the Year, NaaS Product of the Year, Supplier of the Year, and the AT&T Strategic Growth Partner. Command|Link has built the only IT platform for scale that solves ISP vendor sprawl and IT headaches. We make it easy for our customers to get more done, maximize uptime and improve the bottom line.

Learn more about us here!

This is a remote position open to candidates residing in the following states: Alabama, Arizona, Arkansas, Colorado, Florida, Georgia, Indiana, Kansas, Kentucky, Louisiana, Maryland, Michigan, Mississippi, Missouri, Nevada, New Hampshire, North Carolina, Ohio, Oklahoma, South Carolina, Tennessee, Texas, Utah, Virginia, Wisconsin