Senior Software Engineer – Contract

EducationSuperHighway

. Build on the existing API-first full-stack platform connecting employers, employees, and payroll systems .

Posted 10/28/2026contractRemote • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in full-stack engineering, particularly in building and extending API-first platforms with a focus on payroll and HRIS integrations. Proficient in designing reliable background job pipelines and ensuring secure handling of sensitive data while maintaining compliance with industry standards.

Highest-signal resume keywords

Full-Stack EngineeringAPI IntegrationBackground Job PipelinesPayroll SystemsHRIS Platforms

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Production Web ApplicationsOAuth FlowsRelational Data ModelingPayments ProcessingSingle Sign-OnData MinimizationCompliance WorkflowsMulti-Tenant ArchitectureError HandlingAudit Trails

Soft Skills

Clear CommunicationMature JudgmentComfort with Ambiguity

Tools & Technologies

FinchADP Workforce NowDayforceWorkdayUKGRipplingCursorGitHub CopilotCodexClaude

Industry Keywords

HR TechFintechWorkplace GivingPayroll Deduction MechanicsYear-End Tax Compliance

About the role

Key responsibilities & impact

Build on the existing API-first full-stack platform connecting employers, employees, and payroll systems
Extend the platform toward the January 1, 2027 launch alongside the existing engineer
Integrate payroll and HRIS providers through Finch, including ADP Workforce Now, Dayforce, Workday, and UKG
Build direct integrations for providers Finch cannot reach, starting with Rippling
Handle assisted provider connections and pending deductions
Maintain and extend a provider-agnostic integration layer
Build employee enrollment flows and employer campaign and dashboard tooling on a multi-tenant platform
Implement employer single sign-on using OIDC, SAML 2.0, or email-code fallback
Check the IRS list of eligible scholarship granting organizations during designations and deductions
Capture the employee's state at payment
Design background job pipelines with status tracking, retries, dead-letter handling, error visibility, webhook ingestion, and drift detection
Support money movement and reconciliation using payments and ledgering providers such as Modern Treasury
Match payroll deduction files and ACH remittances to enrollments and maintain audit trails
Build compliance-aware year-end acknowledgement generation and delivery workflows
Track document delivery status and recover from failures
Apply security practices and data minimization when handling employee and financial data
Make and document architecture decisions balancing speed and long-term extensibility

Requirements

What you’ll need

7+ years of full-stack engineering experience building production web applications
Early-stage startup experience and comfort with ambiguity
Experience building from 0 to 1 or extending an early-stage system alongside a small team
Regular use of AI coding tools such as Cursor, GitHub Copilot, Codex, or Claude for planning, code generation, debugging, and refactoring
Mature judgment about AI outputs
Strong third-party API integration experience, particularly OAuth flows and structured data write-back
Experience with payroll, HRIS, or other limited or inconsistent vendor APIs
Experience modeling relational data for complex, multi-step, multi-tenant stateful workflows
Ability to build and maintain reliable background job pipelines with named queue technology and operational visibility
Secure handling of PII and financial data
Comfort deploying and monitoring a production service
Clear communication and sound judgment in early-stage, ambiguous environments
Experience integrating payroll or HRIS platforms, including UKG, Rippling, ADP, Dayforce, Workday, or similar
Background in HR tech, benefits, workplace giving, or fintech
Familiarity with payroll deduction mechanics or year-end tax document and compliance-driven document delivery workflows
Experience designing provider-agnostic abstraction layers
Experience with payments or financial data flows such as 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 CRM
Must be legally authorized to work in the United States

Benefits

Comp & perks

Strong path to full-time conversion for the right person
Contract/hourly compensation
Remote work arrangement