About SiPhox Health
SiPhox Health is a fast-growing health technology startup based in Burlington, MA, pioneering at-home blood testing powered by photonic chip technology. We are a team of ~60 people committed to making personalized health insights accessible to everyone. Join us as we scale our operations and build out the infrastructure behind a world-class team.
Role Summary
We are looking for a detail-oriented and proactive Accounts Payable Specialist to join our Finance & Operations team. In this role, you will own the end-to-end AP function, ensuring timely and accurate processing of vendor invoices, employee expense reimbursements, and corporate card transactions. You will work closely with the Admin, Finance & HR Manager and our Finance team to maintain clean & audit-ready records and support smooth day-to-day financial operations.
Key Responsibilities
Invoice & Payment Processing
- Receive, review, code, and process vendor invoices in Bill.com with accuracy and timeliness
- Manage the full AP cycle: purchase order matching, approval routing, payment scheduling, and reconciliation
- Process ACH, check, and virtual card payments through Bill.com; ensure proper authorization is obtained prior to payment
- Research and resolve invoice discrepancies, vendor disputes, and payment issues
Corporate Card & Expense Management
- Administer the company's Brex corporate card program, including card issuance, limit adjustments, and policy enforcement
- Review and reconcile Brex transactions on a regular cadence; ensure receipts and coding are complete and accurate
- Partner with employees to ensure timely expense submission and compliance with company spend policies
- Identify and flag out-of-budget spend for management review
Vendor Management & Reconciliation
- Maintain vendor records in Bill.com, including W-9 collection and 1099 preparation support
- Perform monthly vendor statement reconciliations and proactively follow up on outstanding items
- Build and maintain positive relationships with key vendors and internal stakeholders
Reporting & Compliance
- Prepare weekly and monthly AP aging reports and present key metrics to the Finance team
- Support month-end and year-end close processes, including accruals and account reconciliations
- Ensure compliance with internal controls, company policies, and audit requirements
- Assist with audits by providing documentation and responding to auditor inquiries
Qualifications
Required
- 2+ years of accounts payable or general accounting experience
- Hands-on experience with Bill.com (invoice processing, approval workflows, payment scheduling)
- Hands-on experience with Brex (corporate card administration, expense management, receipt reconciliation)
- Strong attention to detail and commitment to accuracy
- Excellent organizational skills with the ability to manage multiple priorities and deadlines
- Proficient in Microsoft Excel or Google Sheets for reporting and reconciliation
- Clear written and verbal communication skills
Preferred
- Experience in a startup or high-growth environment
- Associate’s or Bachelor’s degree in Accounting, Finance, Business, or a related field
- Experience supporting 1099 preparation and vendor compliance
- Experience working cross-functionally with engineering, operations, or non-finance teams
What We Offer
- Competitive salary commensurate with experience
- Comprehensive health, dental, and vision benefits
- Equity participation in a high-growth startup
- Collaborative, mission-driven team environment
- Opportunity to build and shape AP processes from the ground up
- Burlington, MA office with a dynamic, in-person culture
Pay: $42,000.00 - $90,000.00 per year
Benefits:
- 401(k)
- Dental insurance
- Disability insurance
- Flexible spending account
- Health insurance
- Health savings account
- Life insurance
- Paid sick time
- Paid time off
- Parental leave
- Relocation assistance
- Vision insurance
Work Location: In person
