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Harnham

Technical Product Manager

Harnham, San Francisco, California, United States, 94199

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Technical Product Manager – API Platform (Consumer Simulator) Location:

San Francisco |

Employment Type:

Full-Time

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A new real-time

Consumer Simulator

is being launched to help users and partners understand the impact of financial behaviors on credit scores. At the core of this initiative is a powerful

API platform

enabling seamless simulation capabilities across web applications, external partner integrations, and internal tools.

This role is for a

Technical Product Manager

with deep experience in API products. The focus is on owning the end-to-end delivery of API infrastructure powering credit simulations — from design to partner integration to performance monitoring.

What You’ll Do Define and own the

API product roadmap , requirements, and lifecycle. Design and document

RESTful APIs

that support simulation logic and credit behavior models. Collaborate with engineering and data science to translate complex models into real-time, API-based simulations. Establish best practices for API

versioning ,

authentication ,

error handling , and

rate limiting . Build and evolve the

developer experience : documentation (Swagger/OpenAPI), SDKs, test environments, onboarding workflows. Support external fintech and financial institution integrations with product and technical guidance. Define and track API

usage metrics ,

SLAs , and

performance benchmarks . Prioritize technical debt, bug fixes, and new functionality through agile sprint planning.

What You Bring 4+ years in

product management , with at least 2 years directly owning APIs as a product. Strong understanding of

API design

(REST, JSON, OAuth, pagination, etc.). Experience working with

backend systems ,

data pipelines , or

simulation engines . Hands-on experience with tools like

Postman ,

Swagger/OpenAPI , or

Apigee . Proven ability to collaborate with engineers on

technical architecture

and scalability challenges.

Nice to Have Background in

fintech ,

credit analytics , or

consumer finance products . Familiarity with modern cloud and development stacks (e.g.,

AWS ,

Python ). Exposure to credit scoring or financial simulation models.

This is a high-impact, technically rich product role for someone passionate about building robust API platforms that power intelligent, user-facing financial tools.