Product Engineer - New Product, First Owner

Fuku; San Francisco (CA); On-site; USD 150,000 - 400,000; Full time

Job summary

Fuku in San Francisco is seeking its first Product Engineer for a new product line that combines data APIs with a user-friendly, self-serve UX. This high-autonomy role is built for a builder who wants to ship 0→1.

You will own end-to-end development from discovery to shipping, work closely with Sales and Customer Success, and prototype quickly while aligning with data and privacy guardrails. Visa sponsorship available; startup experience valued.

Qualifications

• 5+ years shipping production-grade software.
• Strong full-stack engineering fundamentals.
• Proven 0→1 product experience.
• Experience working with sales/GTM teams.
• Ability to design and implement core algorithms, AI agent workflows, and natural language interfaces.
• Willingness/eligibility to work in-person in San Francisco for prototyping days (visa sponsorship available).
• Prior startup experience (Series A/B+ preferred).

Responsibilities

• Lead the 0→1 build of a new product on top of Client's APIs.
• Build core algorithms for deterministic AI agents created from natural language.
• Own product strategy and execution: user discovery, scoping, rapid prototyping, shipping, iteration, and metrics.
• Collaborate closely with Sales and Customer Success to identify high-leverage workflows.
• Build production-quality UX (fast, simple, correct).
• Work with the Head of Engineering on architecture, reliability, and data/privacy guardrails.

Skills

Full-stack engineering

0→1 product experience

Sales/GTM collaboration

AI/agent workflows

Natural language interfaces

Tools

APIs

Job description

Product Engineer – New Product, First Owner
Location: San Francisco, CA
Compensation: $150,000 – $400,000 + 0.1%–1% Equity
Type: Full-Time
Visa Sponsorship: H-1B, O-1, OPT
Priority: High

About Company

Client is a profitable, fast-growing, YC-backed company supported by top investors (GC, SV Angel, A Capital, Liquid 2, etc.). The company provides live company and people data via APIs and full dataset delivery, making hard-to-get data easy to use at scale. Their technology pipes in live data from over a dozen sources and delivers it instantly to customers, serving use cases such as:

• Automatic pipeline building
• Pipeline prioritization
• Champion watching
• Company and people triggers for sales and marketing automation
• Investment deal sourcing

Client’s goal is to index all important data on the web and deliver it to customers in an easy-to-use way. The company is launching a new consumer product to expand from <1% customer coverage to the full market.

About the Role — Product Engineer (New Product, First Owner):

The Company is seeking its first engineer dedicated to a new product line. This is a high-autonomy, high-ownership role for a builder, grinder, and founder-type engineer.

You will own the product end-to-end from 0→1, including discovery, prototyping, building, shipping, and iterating. The product is a consumer-facing, self-serve layer on top of Client’s data infrastructure, enabling non-technical users (HR, Sales, Ops) to create AI agents from natural language prompts.

Key Responsibilities:

• Lead the 0→1 build of a new product on top of Client's APIs.
• Build core algorithms for deterministic AI agents created from natural language.
• Own product strategy and execution: user discovery, scoping, rapid prototyping, shipping, iteration, and metrics.
• Collaborate closely with Sales and Customer Success to identify high-leverage workflows.
• Build production-quality UX (fast, simple, correct).
• Work with the Head of Engineering on architecture, reliability, and data/privacy guardrails.

Requirements:

• 5+ years shipping production-grade software.
• Strong full-stack engineering fundamentals.
• Proven 0→1 product experience.
• Experience working with sales/GTM teams.
• Ability to design and implement core algorithms, AI agent workflows, and natural language interfaces.
• Willingness/eligibility to work in-person in San Francisco for prototyping days (visa sponsorship available).
• Prior startup experience (Series A/B+ preferred).

Preferred Qualifications (Green Flags):

• Experience in growth engineering at top companies (Ramp, Brex, Rippling, Workato).
• Founder or early-builder background, ideally in sales tooling, workflow automation, or data APIs.
• Strong CS fundamentals — graduates from IIT/IIIT/DTU or top-tier equivalents.
• Strong product mindset — ability to translate vague needs into shipped product.
• Familiarity with sales data ecosystems (funding, jobs, company data).
• Demonstrated ownership and tenure (2+ years in prior roles).

Disqualifying Factors (Red Flags):

• Job hopping (<2 years each role) without evidence of strong output.
• No experience working with sales or customer-facing teams.
• Extreme over-engineering tendencies.
• Weak exposure to API-based tools, real-time data, or workflow systems.
• Lack of grinder mentality — low resilience for high-effort build cycles.

Interview Process:

1. 30-min video call with CEO
2. 45-min technical screen with Head of Engineering
3. 1-day onsite prototyping
4. Final CEO chat
5. Offer

Ideal Companies From:

• Brex
• Ramp
• Rippling
• Plaid
• Airtable
• Numeral
• strong growth-stage SaaS/data infra companies

Biggest Note:

• Candidates who are top engineers, graduated from top universities, and have experience in big tech moving into startups are almost certain to be shortlisted.
• Client is open to candidates with ex-quant backgrounds as well.