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API Senior Product Manager

9fin · London · posted 1 day ago
FULL_TIME Product
SeniorGo

About 9fin

9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion.

Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis, and high-value workflows across global markets.

Today, 9fin powers teams at 300+ blue-chip institutions worldwide, including global banks, asset managers, private equity firms, law firms, and advisors. The business is scaling at exceptional speed, with rapid expansion in the US and best-in-class retention driven by deep workflow adoption.

We’re at a defining inflection point. With proven product-market fit and strong, global market pull, 9fin is accelerating toward becoming the category-defining platform for debt markets worldwide.

The Opportunity

9fin has built one of the most comprehensive datasets in credit and debt markets: news, financials, cap tables, instrument data, legal documents, and ESG analysis. Today, most clients access that data through 9fin.com. But a large and growing segment of the market wants to consume our data programmatically to power firm-level workflows at scale: a negative news signal triggers an automated credit review, updated financials trigger a portfolio rebalance, a covenant keyword triggers a sanctions flag.

These buyers (quant desks, data engineering teams, systematic investors, risk and compliance functions) will never log into a web application. They need APIs, data feeds, and cloud-native delivery through platforms like Snowflake. At comparable financial data providers, this distribution channel represents 20-30% of total revenue. 9fin is at the beginning of this journey.

The challenge is to "unbundle the bundle": take 9fin's integrated terminal experience and slice it into discrete, well-defined data products that enterprise clients can integrate into their own systems. You will decide how to make those slices, the order in which they go to market, and the delivery mechanisms that match each use case. The first candidates span news content (API and Snowflake), financials and cap tables (REST API), instrument data (API), and legal data (complex, high-value, and genuinely unsolved at the data representation layer).

You will work cross-functionally across our platform teams, analytics engineering, Head of Data, and the domain squads that own the underlying datasets. You will also work closely with Sales to support a fundamentally different GTM motion: solution-selling with partner clients, joint POCs, multi-stakeholder deals, and usage-based commercial models rather than seat-based subscriptions.

There is early infrastructure in place (a third-party API gateway, internal platform capabilities being built, initial Snowflake conversations with clients). This role takes that foundation and turns it into a product line.

This is a 0-to-1 build. If you have built API or data products before and want to do it again in a market where the opportunity is wide open, this is it.

What You'll Do

Product Strategy & Execution

Define the product vision and strategy for 9fin's external data distribution: REST APIs, Snowflake data shares, and future delivery mechanisms (cloud sync, pub/sub).

Own the data catalogue decisions: which datasets to expose, in what format, through which channels, and in what order, balancing client demand, data readiness, and commercial potential

Design the developer experience end-to-end: API design, documentation, developer portal, sandbox/playground, authentication, error handling, rate limiting, and versioning

Work with analytics engineering and domain teams to define schemas, data models, and transformation logic that make 9fin's data consumable and valuable outside the application

Use a partner model to validate early: select and work closely with 1-2 clients during development to co-develop and prove out each data product before broader launch

Shape the commercial model for API products: packaging, tiering, usage-based pricing, distribution controls, and entitlement structures that capture the value of programmatic data access

Data Quality, Infrastructure & Compliance

Partner with the Head of AnalyticsData and analytics engineering to ensure data products meet the reliability, freshness, and accuracy standards that enterprise clients building automated systems expect

Define SLAs for data delivery (latency, uptime, completeness) and build the monitoring and metering infrastructure to back them up

Own the entitlements and access control layer: ensuring the right clients can access the right data under the right contractual terms, with appropriate usage limits and controls

Work with Legal to define data usage policies, including restrictions on redistribution, AI training and model embedding, and onward use, protecting 9fin's data IP while enabling legitimate client workflows

Establish feedback loops between API consumers and domain teams so that usage patterns and client requests improve the underlying data over time

Cross-Functional Leadership & GTM

Coordinate across platform engineering, analytics engineering, domain squads, and the Head of Data to align priorities and ship a cohesive product without a dedicated squad

Influence teams you do not manage; build relationships that make cross-functional delivery work despite competing priorities

Support the shift to a solution-selling GTM motion: work with Sales and Customer Success on partner selection, POC design, technical onboarding, and commercial structuring for API deals

Engage directly with enterprise clients and their technical teams during pilots and integrations; this is a client-facing role, not a back-office one

Communicate strategy, progress, and trade-offs transparently to leadership, engineering, and commercial teams

Translate technical API and data infrastructure concepts into language that non-technical stakeholders (Sales, Legal, Finance) can act on

What We're Looking For

5+ years of product management experience, with at least 2 years building API products, data platforms, or data distribution products at a B2B company

Experience designing APIs for external consumers: you have opinions on schema design, versioning strategies, rate limiting, and what makes developer documentation actually useful