Software Engineer II, Backend

Zigsaw

Backend Engineer focusing on contract lifecycle management and billing systems for CTV platform at Pinterest. Collaborating across teams to implement robust backend solutions with data integrity.

Posted 4/30/2026full-timeSan Francisco • California • 🇺🇸 United StatesMid-LevelSenior💰 $123,696 - $254,667 per yearWebsite

Tech Stack

Tools & technologies

JavaJavaScriptPythonReactRedux

About the role

Key responsibilities & impact

Design and implement backend systems for contract lifecycle management, including creation, versioning, approvals, amendments, and renewals
Build and evolve contract management capabilities (e.g., terms, payouts, attribution rules, eligibility, and partner-specific logic) for our CPA Contract/Billing model
Support the expansion of CPM billing model contracts, including rate management, impression-based calculations, and integrations with billing and finance systems
Develop APIs and services that serve customers, internal operations teams, and finance stakeholders
Partner closely with Product, Finance, and Data teams to translate business requirements into robust technical solutions
Ensure systems are auditable, accurate, and compliant, with strong data integrity guarantees
Improve system observability, reliability, and performance as contract volume and complexity scale
Own backend services and data models related to contracts and billing
Lead technical design discussions and make pragmatic architectural decisions
Write clean, well-tested, and maintainable code with a strong focus on correctness
Drive improvements in data consistency, validation, and error handling across contract workflows
Review code and mentor other engineers, setting a high bar for backend quality
Collaborate cross-functionally to support new deal structures and evolving business models

Requirements

What you’ll need

Experience with billing/contract mechanisms (specifically affiliate platforms)
Bachelor’s degree in computer science, a related field or equivalent experience
Experience building large-scale full-stack products.
Deep understanding of web development and best practices in React/Redux
Strong experience with programming languages Javascript and Python/Java
Strong software engineering principles and practices
Strong collaboration and communication skills
Demonstrated ability to use AI to improve speed and quality in your day-to-day workflow for relevant outputs
Strong track record of critical evaluation and verification of AI-assisted work (e.g., testing, source-checking, data validation, peer review)
High integrity and ownership: you protect sensitive data, avoid over-reliance on AI, and remain accountable for final decisions and deliverables.

Benefits

Comp & perks

Health insurance
401(k) matching
Paid time off
Flexible work arrangements
Professional development opportunities
Work-life balance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

backend systems designcontract lifecycle managementAPI developmentdata modelsJavascriptPythonJavaReactReduxsoftware engineering principles

Soft Skills

collaborationcommunicationcritical evaluationdata validationmentoringownershipintegrityproblem-solvingleadershipadaptability

Certifications

Bachelor’s degree in computer sciencerelated field or equivalent experience