Senior Software Engineer – Contract

This is a fully remote position, open to applicants in United States.

📋 Description

• Enhance the current API-first full-stack platform that links employers, employees, and payroll systems.

• Expand the platform in preparation for the January 1, 2027 launch in collaboration with the existing engineering team.

• Integrate payroll and HRIS providers through Finch, including ADP Workforce Now, Dayforce, Workday, and UKG.

• Develop direct integrations for providers that Finch cannot access, beginning with Rippling.

• Manage assisted provider connections and pending deductions.

• Sustain and enhance a provider-agnostic integration layer.

• Create employee enrollment processes and employer campaign and dashboard tools on a multi-tenant platform.

• Implement employer single sign-on using OIDC, SAML 2.0, or email-code fallback mechanisms.

• Verify the IRS list of eligible scholarship granting organizations during designations and deductions.

• Record the employee's state at the time of payment.

• Design background job pipelines featuring status tracking, retries, dead-letter handling, error visibility, webhook ingestion, and drift detection.

• Facilitate money movement and reconciliation using payment and ledgering providers like Modern Treasury.

• Align payroll deduction files and ACH remittances with enrollments while maintaining audit trails.

• Construct compliance-aware year-end acknowledgment generation and delivery workflows.

• Monitor document delivery status and recover from any failures.

• Implement security practices and data minimization when managing employee and financial information.

• Make and document architectural decisions that balance speed with long-term extensibility.

⛳️ Requirements

• A minimum of 7 years of full-stack engineering experience in developing production web applications.

• Experience in early-stage startups and the ability to navigate ambiguity.

• Proven track record of building from the ground up or enhancing an early-stage system alongside a small team.

• Regular use of AI coding tools such as Cursor, GitHub Copilot, Codex, or Claude for planning, coding, debugging, and refactoring.

• Mature judgment regarding AI outputs.

• Strong experience in third-party API integration, specifically with OAuth flows and structured data write-back.

• Familiarity with payroll, HRIS, or other limited or inconsistent vendor APIs.

• Experience in modeling relational data for complex, multi-step, multi-tenant stateful workflows.

• Ability to develop and maintain reliable background job pipelines utilizing named queue technology and operational visibility.

• Secure handling of Personally Identifiable Information (PII) and financial data.

• Comfort in deploying and monitoring a production service.

• Clear communication skills and sound judgment in early-stage, ambiguous environments.

• Experience in integrating payroll or HRIS platforms such as UKG, Rippling, ADP, Dayforce, Workday, or similar.

• Background in HR technology, benefits, workplace giving, or fintech.

• Familiarity with payroll deduction mechanics or compliance-driven document delivery workflows related to year-end tax documents.

• Experience in designing provider-agnostic abstraction layers.

• Knowledge of payments or financial data flows like ACH, ledgering, or reconciliation.

• Experience with single sign-on and identity provider integrations such as OIDC, SAML, or Okta.

• Experience integrating with Salesforce or another Customer Relationship Management (CRM) system.

• Must possess legal authorization to work in the United States.

🏝️ Benefits

• Clear pathway to full-time employment for the right candidate.

• Compensation on a contract/hourly basis.

• Opportunity for remote work.