
Extend · New York City
Extend is building a modern document processing cloud. We're on a mission to transform how the world works with unstructured data. As a Machine Learning Engine...
Extend is building a modern document processing cloud. We're on a mission to transform how the world works with unstructured data.
As a Machine Learning Engineer at Extend, you’ll be responsible for building state-of-the-art document processing infrastructure.
The work you do will impact every single customer across the millions of documents that our system ingests and processes every
month.
We’re looking to hire engineers who think creatively about problems, keep up to date on the latest in AI research, push for
real-world customer impact (not only theory), and are excited about helping businesses tackle one of their most painful problems
with AI.
(Brex, Mercury, Checkr), and many more
everyone joining at this stage will have outsized impact
in-person in NYC, with high equity ownership
We're a lean team, and our customer base is growing too fast for us to keep up. We're looking for talented engineers to join our
team and execute on an ambitious roadmap.
issues
of product and engineering and have direct relationship with customers.
Beyond the below, we care deeply about each of our candidates on a personal level. We take the time to understand your needs to
Extend is an Equal Opportunity Employer. We consider all qualified applicants for employment without regard to race, color,
religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, genetic information,
citizenship status, marital status, pregnancy, protected veteran status, or any other characteristic protected by applicable
federal, state, or local law.
YOUR MISSION We are searching for a curious individual who is comfortable multitasking while working on various aspects of our platform. In this role, you will be an essential part of an interdisciplinary team developing and testing the efficacy and safety of these therapeutics in mouse models and iPSCs. JOB DESCRIPTION Key Responsibilities * Molecular Characterization: Perform routine DNA/RNA extraction from diverse tissues and cells, followed by qPCR/ddPCR for biodistribution and Western Blotting/ELISA for protein expression analysis. * Cellular Assays: Maintain mammalian cell cultures and perform microscopy and/or flow cytometry to evaluate expression and therapeutic impact in disease-relevant models. * In Vivo Integration: Support the in vivo team with tissue processing, molecular follow-up, and behavioral assays depending on animal handling proficiency. * Sequencing Workflows: Prepare NGS libraries for transcriptomic studies to support our machine learning-driven design process. * Data Processing: Analyze and quantify results using various analytical software (GraphPad Prism, FlowJo, CellProfiler). * Documentation: Maintain a detailed and accurate electronic lab notebook (Benchling) and present data to the interdisciplinary design team. Required Qualifications * Education: B.S. or M.S. in Molecular Biology, Neuroscience, or a related field. * Experience: 1–3 years of laboratory experience in a research or industry setting. Core Skillset * Strong proficiency in molecular biology (Western Blotting, ELISA, RNA/DNA isolation, NGS library preparation, and qPCR). * Strong aseptic technique and mammalian cell culture experience. Preferred Qualifications * In Vivo Skills: Basic experience with mouse handling, dosing, or tissue necropsy. * Therapeutic Area: Familiarity with AAV biology or muscle/CNS disease models. WHY US? * Contribute to the development of bespoke medicines for CNS and muscle diseases. * Work within a state-of-the-art platform that merges wet-lab biology with computational machine learning. * High-impact role with the opportunity to see therapies move from design toward the clinic.
ABOUT F2 F2 is the AI platform for private markets investors — purpose-built to transform how institutional teams underwrite, diligence, and deploy capital. Our AI converts messy, unstructured deal materials into investment-grade insights in minutes, helping private credit funds, commercial banks, and private equity firms make faster, more confident decisions. Backed by leading investors, including NFX and Y Combinator, we’re scaling a world-class product and engineering team to build the future of vertical AI for finance. We are scaling quickly across our offices in New York, San Francisco, and London. ROLE OVERVIEW We're hiring a Head of Talent to build and own the full recruiting function at F2 — from strategy to close. We're doubling our headcount over the next two quarters, and this role is critical to making that happen. You'll partner directly with Finance and senior leadership to build hiring plans, set comp bands, and bring the caliber of people who will define what F2 becomes. As our first dedicated talent leader, you'll build the function from the ground up — with real ownership and real impact. This is the right role for someone who has built hiring infrastructure from scratch in a high-growth startup environment, knows how to recruit without relying on big-company brand leverage, and can operate as both a strategic talent partner and a hands-on full-cycle recruiter. WHAT YOU’LL DO * Own full-cycle recruiting across functions, with an emphasis on engineering, product, AI, deployment, and GTM roles. * Build the recruiting engine from the ground up: sourcing strategy, pipeline architecture, interview process, scorecards, candidate experience, offer process, and close strategy. * Partner with leadership and Finance on headcount planning, role prioritization, comp bands, recruiting budget, and agency ROI. * Bring a sales mindset to candidate engagement, including outbound messaging, narrative-building, objection handling, and close strategy. * Build strong pipelines in competitive talent markets, especially NYC and SF engineering, AI, product, and GTM ecosystems. * Create lightweight but rigorous recruiting systems, including ATS hygiene, reporting, funnel metrics, source quality, and hiring manager accountability. * Act as a talent brand ambassador for F2, helping candidates understand the size of the opportunity, the quality of the team, and the urgency of the market. * Help the company scale thoughtfully across New York, San Francisco, and London while keeping talent density high. YOU MIGHT BE A GREAT FIT IF * You have 6+ years of recruiting experience, including meaningful time in an early-stage or high-growth startup environment. * You have built a hiring function or recruiting engine from scratch, not just operated inside an established recruiting machine. * You have hired across technical and go-to-market roles, ideally including software engineering, product, AI, sales, and customer-facing roles. * You understand what it takes to recruit in low-brand-leverage environments where candidate selling, precision, persistence, and market mapping matter. * You are fluent in the NYC and SF talent markets and understand how competitive engineering and AI recruiting have become. * You are highly commercial: you can build a candidate narrative, sell the company, navigate objections, and close top talent. * You are analytical and comfortable with headcount plans, recruiting funnels, comp calibration, and basic recruiting finance. * You move quickly, operate with precision, and thrive in ambiguity. * You are energized by AI, private markets, and the chance to help build a category-defining company. PREFERRED QUALIFICATIONS * Experience scaling a startup from pre-seed, seed, or Series A through a major growth phase. * Experience hiring for AI, fintech, B2B SaaS, infrastructure, or vertical software companies. * Strong track record recruiting in both New York and San Francisco talent markets. * Experience partnering with founders, Finance, and senior leadership on headcount planning. * Familiarity with Ashby or similar modern ATS platforms, plus comfort building recruiting dashboards and pipeline reporting. WHY F2? * Join a fast-growing AI company building the execution layer for private markets and finance. * Own the talent function at a critical stage of company growth. * Work directly with founders and senior leaders on the hires that will shape the company. * Join a high-talent-density, in-person culture across New York, San Francisco, and London. * Competitive compensation, meaningful equity, and benefits. * Build something from scratch in a market where product momentum, customer urgency, and category timing are aligned. Location: New York, New York - Fully Onsite in our beautiful office in FiDi Base Salary: $170,000 – $200,000 + equity + benefits * For exceptionally senior candidates, final compensation may vary based on scope and experience.
About Wintermute Wintermute is a technology unicorn and one of the largest algorithmic trading companies, specialising in digital assets. We provide liquidity across most cryptocurrency exchanges and trading platforms, a broad range of OTC trading solutions as well as supporting high profile blockchain projects and traditional financial institutions moving into crypto. Wintermute also has a Wintermute Ventures arm that invests in early stage DeFi projects. Wintermute was founded in 2017 and has successfully navigated industry cycles. Culturally, we combine the best of the two worlds: the technology standards of high-frequency trading firms in traditional markets and the innovative and entrepreneurial culture of technology startups. At Wintermute, we believe in the innovative potential of blockchain, the fundamental innovations, we have a long-term view on the digital asset market and are taking a leadership position in building an innovative and compliant market. You can read more here. Working at Wintermute You are an experienced machine learning engineer or researcher with a strong track record in applied deep learning, ideally in domains involving high-frequency or large-scale time-series data. You will focus on developing alpha signal generation pipelines from data ingestion and feature engineering to model training and deployment, in collaboration with our trading and infrastructure teams.