Sr Software Engineer II

What You’ll Do

• Build net-new financial systems — design and deliver Pax8’s core financial infrastructure with a focus on auditability, scalability, performance, and bullet-proof money handling.
• Own complex financial domains — model transactions, events, and ledgers with clear domain boundaries and strong guarantees of correctness.
• Design event-driven architectures — using Kafka and asynchronous patterns to support reliable, traceable financial flows.
• Apply Domain-Driven Design — shaping clean domains, event models, and system boundaries that will scale with the business.
• Collaborate deeply — working closely with product, engineering, and adjacent teams to turn complex financial requirements into working systems.
• Lead through example — contributing to design and code reviews, mentoring peers, and raising the engineering bar without formal people management.
• Support production systems — participating in on-call rotations for critical financial workflows where accuracy and calm execution matter most.
• Deliver faster with AI — using coding agents and generative AI to accelerate implementation, testing, and documentation while maintaining full ownership of quality.

The impact you’ll make

You’ll help create the financial backbone of Pax8 — systems where mistakes are unacceptable, trust is paramount, and scale is built in from day one. Your work will directly support compliance, partner confidence, and Pax8’s ability to grow responsibly.

What You’ll Bring

• Proven experience building financial or money-handling systems such as billing, payments, ledgers, or transaction platforms where correctness and auditability are critical.
• Strong understanding of financial integrity, compliance expectations, and failure modes — even outside traditional banking environments.
• Substantial backend engineering expertise with Kotlin and Spring Boot, building production-grade services.
• Demonstrated experience with event-driven architectures and tools such as Kafka, especially for financial workflows.
• Comfort designing systems using Domain-Driven Design, clean domain boundaries, and explicit event models.
• Ability to operate confidently in environments where errors have real consequences and quality cannot be compromised.
• A practical, hands-on approach to AI-enabled development — using coding agents, spec-driven workflows, and AI-assisted testing as part of daily delivery.
• The presence and maturity to operate at Senior Software Engineer II level immediately, contributing leadership while supporting internal mobility and team growth.

Trust And How We Hire

We use a range of measures throughout the recruitment process to help confirm authenticity and prevent fraud. These safeguards are designed to be fair, respectful, and proportionate, and may evolve as risks change.

Salary & Benefits

• Target base salary: $170,000 – $185,000, or more depending on experience.
• All FTE Pax8 People Enjoy The Following Benefits:
• 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

Growth at Pax8

There's extensive room for a talented individual to grow at pace — whether that's advancing quickly in this role or exploring one of the many opportunities across our global organization. You'll have access to our internal development hub designed to accelerate your skills and stretch your potential. Alongside specialist Learning & Development trainers, you'll also tap into AI powered tools, "born in the cloud" mentors, and cross continent collaboration that broaden your perspective and sharpen your expertise. We'll give you the space, trust, and the right projects to help you thrive — and full visibility of what it takes to reach your next level.

About Pax8

Our mission is to build the managed intelligence marketplace and empower small businesses to do more with smarter technology. We are a fast-growing, dynamic, and high-energy organization with a start-up feel, allowing you to make a meaningful impact on the business.

Equal opportunities

Pax8 is an equal opportunities employer and welcome individuals who are in possession of the appropriate requirements to work within the country the role is based in. Offered individuals will be asked to undertake identity, security compliance and reference checks. Your privacy is important to us. Your data will be held in accordance with Data Privacy best practices and processed only in accordance with our recruiting processes.