[Remote] Sr Software Engineer II
Note: The job is a remote job and is open to candidates in USA. Pax8 is a fast-growing FinTech company focused on building innovative technology solutions. They are seeking a Senior Software Engineer II to design and deliver their core financial infrastructure, ensuring auditability and scalability while collaborating with various teams.
Responsibilities
- 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
Skills
- 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
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
Company Overview