Haven Talent

Helping a handful of AI startups in the Bay & NYC place early product, design, and engineering talent.

Startup Technical Recruiter/Founder

We're a tight-knit group of engineers, editors, and creatives combining humans and technology to create a new model for digital publishing. Together, we’re building an open platform where anyone can share their ideas and where over 100 million readers come to find insightful and dynamic thinking—and we’re growing fast.

At Medium, we celebrate diversity in people, perspectives, and experiences, and we encourage new ideas and experimentation. Like our platform, there's room for you and your ideas to breathe — you’re not constrained by your job description. And we know that your life outside of Medium is just as important as the one inside of it.

We’re creating a better place on the Internet for ideas, and we’d love for you to join us. For a full listing of our jobs, visit jobs.medium.com.

Medium

Leading recruiting for the small, but mighty team at Medium!

Referred into the role from past colleagues at Citizen and Stash.

Senior Technical Recruiter

Stash is a personal finance app that makes investing easy and affordable for millions of Americans. From budgeting paychecks to stock rewards and saving for now or retirement, we help Stashers create more financial freedom. Stash’s Smart Portfolio was named the top-performing robo-advisor for 2023 by Condor Capital.

Stash also partners with employers to offer “StashWorks,” a workplace benefit to improve financial wellness for employees. With StashWorks, employees can learn about money, contribute to their savings, and earn rewards for achieving their financial goals. See our disclosures: https://bit.ly/3Tff1jI

Stash

***Laid off as part of companywide mass layoffs

Referred into the role from Chief People Officer at Citizen (the company before this one)

Was originally brought on as a contract Senior Technical Recruiter to help with engineering recruiting. Converted to full time and ended up being the only recruiter at the company until the 25% reduction in workforce.

Team Size ~300

Citizen is the No. 1 public safety app in the U.S., with a mission to make the world a safer place. Citizen provides 911 alerts so people can use their phones to keep themselves, and the people and places they love, safe. Citizen has notified people to evacuate burning buildings, deterred school buses from nearby terrorist attacks, and led to the rescue of kidnapped children and missing people.

Citizen’s 911 alerts are accompanied by live stories, real-time updates, and user-generated content so app users never have to wonder why there are helicopters overhead or fire engines flying by. By broadcasting from the scene of an incident, communicating with one another, and reading live updates, communities are empowered by Citizen. We act fast, break news, and give people the immediate information they need to stay safe. And we’re just getting started.

Our flagship paid product—Citizen Premium—is a only-of-its-kind personal safety subscription that allows users to reach a digital guardian 24/7 for $20/mo. Subscribers used Citizen Premium to guide emergency response to remote hiking locations, or travel safely on late-night walks.

Citizen Plus, which sits between the free Citizen app and Citizen Premium at $5/mo, currently unlocks 6 new features. Available for the first time ever, Citizen Plus includes the powerful ability to listen to police and fire radios, customize your alerts, unlock past incidents, create alert zones, view nearby registered offenders, and see crime statistics.

Already relied on by millions of people every day, Citizen will expand even further across the United States this year to keep more users safe and informed. We’re looking for hardworking, mission-driven individuals to help bring Citizen to hundreds of cities nationwide.

Citizen is backed by 8VC, Founders Fund, Goodwater Capital, and Greycroft and has raised tens of millions in VC funding.

https://vimeo.com/499700748

Citizen

***Laid off as part of companywide mass layoffs

Referred into the role from past connections made at Panorama.

Was brought on to lead all Product and Engineering recruiting for Citizen! Team size ~200.

On the journey to be the world's most trusted driver. With the Waymo Driver, we can improve mobility while saving thousands of lives. Download the Waymo One app and ride today.

Waymo reaches out to candidates from official channels only (e.g. directly from @waymo.com email addresses, or through our recruiters or sourcers who are noted as such on LinkedIn). We do not contact candidates about career opportunities through instant messaging apps like Telegram, email addresses from domains other than waymo.com (such as Gmail addresses), direct messages on Twitter, Facebook, and Instagram, or text messages. Visit waymo.com to check out our official job listings.

Waymo

My previous manager at Waymo hired me back for a special project. 

Did a deep dive study of every HBCU in the country (from the lens of software and robotics) and put together guidance on which schools Waymo should target

Technical Sourcer / DEI Researcher 

Rotimi Lademo

TensorZero in NYC seeks ML Engineering/Research experts with deep LLM or RL expertise. Must have published research, frontier lab experience, or major OSS contributions. Top PhD preferred. Work onsite 5 days/week. Build interfaces, optimize models, and lead projects. Visa sponsorship available. $180k-$250k.

Brett Göhre

TensorZero is an <a target="_blank" rel="noopener noreferrer nofollow" class="inline-block" href="https://github.com/tensorzero/tensorzero">open-source</a> platform that creates a feedback loop for optimizing LLM applications — turning production data into smarter, faster, and cheaper models.<ol><li>Integrate our model gateway</li><li>Send metrics or feedback</li><li>Optimize prompts, models, and inference strategies</li><li>Watch your LLMs improve over time</li></ol>It enables a data &amp; learning flywheel for LLMs by unifying:<ul><li>Inference: one API for all LLMs, with &lt;1ms P99 overhead</li><li>Observability: inference &amp; feedback → your database</li><li>Optimization: from prompts to fine-tuning and RL (&amp; even 🍓?)</li><li>Experimentation: built-in A/B testing, routing, fallbacks</li></ul>The project is brand new with an ambitious roadmap ahead. We started building in stealth in February, completed a successful technical pilot over the summer, and just announced the open-source project (September).We’ve raised from FirstMark (backed ClickHouse), Bessemer (backed Anthropic), Bedrock (backed OpenAI), and many angels. We’re lucky to have years of runway, giving us flexibility to fully focus on open source for now with an ambitious long-term vision.

TensorZero

TensorZero is an open-source platform that creates a feedback loop for optimizing LLM applications — turning production data into smarter, faster, and cheaper models.



We are looking for a Founding Member of Technical Staff with a background in ML engineering or research.Why not “engineer” or "researcher"? We’re not going to make a distinction between engineers and researchers to encourage people to have cross-functional scope and impact. Our CTO has a PhD in reinforcement learning but also writes infrastructure code in Rust.Today we particularly need help building delightful interfaces, but expect everyone to contribute to the entire project over time. The vast majority of your work will be open source. You’ll have an opportunity to continue to master your current skills with the flexibility to learn new ones from scratch.You can learn more about our technical roadmap and vision <a target="_blank" rel="noopener noreferrer nofollow" href="https://www.tensorzero.com/docs/vision-roadmap">here</a>. As a preview, if you joined today, you'd likely work on advanced inference strategies (e.g. MCTS) or new optimization recipes (e.g. different sorts of RL and APE).

Founding Member of Technical Staff — ML Engineering / Research

TensorZero is an open-source platform that creates a feedback loop for optimizing LLM applications — turning production data into smarter, faster, and cheaper models.

Integrate our model gateway

Send metrics or feedback

Optimize prompts, models, and inference strategies

Watch your LLMs improve over time

It enables a data & learning flywheel for LLMs by unifying:

Inference: one API for all LLMs, with <1ms P99 overhead

Observability: inference & feedback → your database

Optimization: from prompts to fine-tuning and RL (& even 🍓?)

Experimentation: built-in A/B testing, routing, fallbacks

The project is brand new with an ambitious roadmap ahead. We started building in stealth in February, completed a successful technical pilot over the summer, and just announced the open-source project (September).

We’ve raised from FirstMark (backed ClickHouse), Bessemer (backed Anthropic), Bedrock (backed OpenAI), and many angels. We’re lucky to have years of runway, giving us flexibility to fully focus on open source for now with an ambitious long-term vision.

Role
We are looking for a Founding Member of Technical Staff with a background in ML engineering or research.

Why not “engineer” or "researcher"? We’re not going to make a distinction between engineers and researchers to encourage people to have cross-functional scope and impact. Our CTO has a PhD in reinforcement learning but also writes infrastructure code in Rust.

Today we particularly need help building delightful interfaces, but expect everyone to contribute to the entire project over time. The vast majority of your work will be open source. You’ll have an opportunity to continue to master your current skills with the flexibility to learn new ones from scratch.

You can learn more about our technical roadmap and vision here. As a preview, if you joined today, you'd likely work on advanced inference strategies (e.g. MCTS) or new optimization recipes (e.g. different sorts of RL and APE).

Team & Culture
We’re a technical team of two based in NYC (in person). As an early contributor, you’ll work closely with us and have a significant impact on the project’s future and vision.

Viraj Mehta (CTO) recently completed his PhD from Carnegie Mellon, with an emphasis on reinforcement learning for LLMs and nuclear fusion, and previously worked in machine learning at KKR and a fintech startup; he holds a BS in math and an MS in computer science from Stanford.

Gabriel Bianconi (CEO) was the chief product officer at Ondo Finance ($10B+ valuation) and previously spent years consulting on machine learning for companies ranging from early-stage tech startups to some of the largest financial firms; he holds BS and MS degrees in computer science from Stanford.

What We Offer
Competitive compensation — We believe that great talent deserves great compensation (salary, equity, benefits), even at an early-stage startup.

Open-source contributions — The vast majority of your work will be open source and public.

Learning and growth opportunities — You’ll join with a background in ML but will have the opportunity (& be encouraged) to expand your skill set way beyond that (curious about Rust?).

Small, technical, in-person team — You’ll work alongside a 100% technical team and help shape our vision, culture, and engineering practices.

Best-in-class investors — We’re lucky to be backed by leading funds like FirstMark (backed ClickHouse), Bessemer (backed Anthropic), Bedrock (backed OpenAI), and many angels. We have years of runway and a long-term mindset.

We’re Looking For
Strong technical background — You’ve tackled hard technical problems. You’re comfortable driving large projects from inception to deployment.

Background in LLMs or RL — You’ll complement the team with a strong background and technical leadership. In particular, we're interested in people who have experience at the frontier of either LLMs or reinforcement learning.

Hungry for personal growth — There are no speed limits at TensorZero. You’re excited about learning and contributing across the stack.

In-person in NYC — We work in-person five days a week in NYC. We work hard and obsess about the craft – but maintain and encourage a healthy lifestyle with a long-term mindset.

Ok with O1, H1B transfer, TN, etc. No H1B from scratch. 

San Francisco, CA, on-site. No visa sponsorship. $130k-$180k. Must have deep Python expertise, AWS, Kubernetes, Terraform, Docker. Passion for open-source, competitive programming, standout achievements. Responsibilities: Optimize open-source project, enhance hosting service (logs, auth, DB), improve performance. Engage with Reflex community.

Rithik Goli

Reflex is the open-source framework empowering Python developers to build web apps faster. Build both your frontend and backend in a single language, Python (pip install reflex), with no JavaScript or web development experience required. Build anything from internal data and AI apps to large public-facing web apps and deploy with a single command (reflex deploy). Reflex provides high-level UI components, easy deployment and AI agents to create, edit, and deploy apps 10x faster than traditional web development while also remaining extensible through custom components that can fully leverage JavaScript's expressivity. Our mission is to simplify web development by creating an ecosystem of open-source tools and hosted services that enable Python developers to build web apps faster without compromising on customizability, flexibility, or performance.

Reflex

<a target="_blank" rel="noopener noreferrer nofollow" href="https://reflex-dev.notion.site/reflex-careers">https://reflex-dev.notion.site/reflex-careers</a>We’re looking for a strong generalist software engineer comfortable working on a very early product in a quickly changing codebase and role. This person will help design and build our hosting service from the ground up, touching a bit of the open source project as well. They will work in-office with our team in SF 5 days a week.Responsibilities:<ul><li>Help optimize and improve our open-source project.</li><li>Work on improving our different aspects of our hosting service:<ul><li>Streaming logs, Authentication, authorization, database management</li></ul></li><li>Work on improving performance, shaving milliseconds off our deployment times.</li><li>Take an active role in the Reflex community by seeking feedback, integrating contributions, and fostering positive and collaborative relationships.</li><li>Skills: AWS, Docker, Python, Auth, Postgres</li></ul>

Software Engineer (Backend/Infra)

We’re looking for a strong generalist software engineer comfortable working on a very early product in a quickly changing codebase and role. Our office is in San Francisco and we work in person M-F.
This role will involve working on some feature for our hosting service including authentication, payments, and touching a bit of the open source project as well.
Why join Reflex now?:
Growth: We have had over 100k Reflex apps built from companies ranging from Fortune 100 to YC start ups. Hit our record number of daily active users Monday and broke it again yesterday.
Team: Work with people who are genuinely passionate about improving the web. Our founding team consists of open source maintainers, top ranked competitive programmers/IOI medalists, and founding team members from dev tool unicorns.
Future: We are gearing up for an official launch of our hosting service and releasing a full stack agent that can build apps for you.
Responsibilities:
Help optimize and improve our open-source project.
Work on improving our different aspects of our hosting service:
Streaming logs, Authentication, authorization, database management
Work on improving performance, shaving milliseconds off our deployment times.
Take an active role in the Reflex community by seeking feedback, integrating contributions, and fostering positive and collaborative relationships.
Skills: AWS, Docker, Python, Auth, Postgres
What We Look for:
3+ year of experience in software engineering
Very comfortable writing Python.
Background in contributing to open source software, competitive programming, and/or interesting side projects.
Have set up authentication, payments, and authorization at a previous role.
Passion for open source software and contributing to open source communities.
About the interview:
The entire process is fully remote; all communication will happen via email and video chat.
Once you've submitted your application, the team will review your submission and may reach out for an intro call.
After the intro call, there will be a technical take-home test and then an onsite with 2-3 technical interviews, each around 45 minutes.
Once the interviews are over, the team will meet to discuss several roles and candidates and may be asked one or two follow-up questions over email or a quick call or go directly to make an offer.

Persona seeks Customer Success expert in SF or NY. Hybrid work, visa sponsorship available. Drive customer success through onboarding, implementation, and expansion. Manage large accounts; communicate technical concepts to diverse stakeholders. Collaborate cross-functionally, influence product roadmap, and amplify success stories. Salary: $120k-$150k. Proven track record required.

Valerie Kosiadi

Founded in 2018, <a target="_blank" rel="noopener noreferrer" class="postings-link" href="https://withpersona.com/">Persona</a> is a 250-person tech startup based in San Francisco, backed by Index Ventures, Coatue, Founders Fund, and First Round Capital. Persona offers flexible building blocks that help businesses fight fraud, stay compliant, and build trust among their customers. For example, Coursera uses Persona to ensure the right person is earning each degree, OpenAI uses Persona to prevent the misuse of ChatGPT, and Lime checks the ages of customers before they ride electric scooters or bikes. To learn more, check out this <a target="_blank" rel="noopener noreferrer" class="postings-link" href="https://www.youtube.com/watch?v=Jq4qqR3I9JA&amp;t=3s">short video</a>.

Persona

As a member of Persona’s Customer Success team, you will be a trusted advisor for a portfolio of growing Enterprise and Core customers, supporting them at each stage of their lifecycle with Persona and ensuring they derive value from our platform and services. You’ll be responsible for onboarding new customers, managing relationships with existing customers, and strengthening customers’ engagements with Persona through renewals and expansion.This isn't your typical Customer Success role. At Persona, you will be a key contributor on a fast-growing go-to-market team working cross-functionally across sales, engineering, product, and marketing. Our Customer Success Managers have directly influenced business outcomes, impacted Persona's product roadmap by synthesizing customer feedback, and driven revenue growth through deepened platform adoption.

Enterprise Customer Success Manager

In-office with the option to work from home Mondays and Fridays in San Francisco or New York

On-site in SF, 5 days/week. Hands-on technical builder needed. Must work with APIs, databases, SQL, Postman. Experience from top 25 US/CAN school, startup background preferred. Customer interfacing and tech product building experience required. Visa sponsorship available. Salary: 90-160K. High ownership, attention to detail crucial.

Charles Meng

We’re modernizing construction, a $12T global industry run by siloed software built 20-40 years ago (on-prem, no APIs, no mobile access, etc.). We connect these systems by building proprietary APIs and wrapping them in a modern UI for automating work.Construction Software Companies use our API to integrate their apps with these systems. Construction Companies use our UI to automate work, like keeping financial data in sync between field teams on jobsites and accounting teams in an office. We save both time and money, making them more productive and profitable.Our founding team has worked together for 10 years, first at Graphiq (acq. by Amazon) then at Amazon. We've raised $3M from YC, Accel, and leaders from Plaid, Procore, Autodesk, PlanGrid, Aconex, and more.These slides explain our company and market: <a target="_blank" rel="noopener noreferrer nofollow" href="https://docs.google.com/presentation/d/1VIRjj0W8wISEqM2IjPsg2-7carWSw-35GlC4ROTXXkU/edit?usp=sharing">https://docs.google.com/presentation/d/1VIRjj0W8wISEqM2IjPsg2-7carWSw-35GlC4ROTXXkU/edit?usp=sharing</a>.

Agave (YC W22)

Hands-on, technical builder to own our system integrations and customer implementations. You will need to embody opposite traits. On one hand, diving deep into the technical nuances of source systems, building data models, and translating complex business logic to our engineers. On the other hand, working 1:1 with customers to define their requirements, onboard them, run demo meetings, negotiate deliverables, and more. You will interface daily between our engineers, customers, and partners (the systems we integrate with).

Details: https://docs.google.com/presentation/d/1VIRjj0W8wISEqM2IjPsg2-7carWSw-35GlC4ROTXXkU/edit#slide=id.g11fbbbdf46f_1_0

Technical Product Manager

Founding Technical Product Owner
$75K - $150K / 0.10% - 0.25%
Location
San Francisco, CA, US
Job Type
Full-time
Experience
1+ years
Connect directly with founders of the best YC-funded startups.
Apply to role ›
Tom Reno
Tom Reno
Founder
About the role
tl;dr: needed ASAP - a hands-on, technical builder to own our system integrations and customer implementations. You will need to embody opposite traits. On one hand, diving deep into the technical nuances of source systems, building data models, and translating complex business logic to our engineers. On the other hand, working 1:1 with customers to define their requirements, onboard them, run demo meetings, negotiate deliverables, and more. You will interface daily between our engineers, customers, and partners (the systems we integrate with). Since we're early stage, we expect you to be a strong generalist, helping us meet product, solutions engineering, and customer success needs outside of your core role. No need to have familiarity with construction.

WHY JOIN US
Opportunity: you have the chance to be an early, pivotal member of a fast-growing YC startup modernizing one of the world's largest and most critical industries (construction). You'll work with our world-class engineers to deliver and expand our core product.
Team: you'll work with a formidable founding team that's experienced, intense, and ambitious. We've worked together for 10 years, first at a startup that Amazon acquired, then at Amazon, and now at Agave. You'll learn a ton while having outsized ownership.
Timing: you're joining at a key inflection point. We're proven (we've grown revenue 3x year over year, have 85+ customers) but also early. This means you have lower risk but also huge upside.
RESPONSIBILITIES
Investigate new source systems to integrate with (data models, business logic, APIs, etc.) and become our go-to subject matter expert on each. It’s part product, part data analysis, and part archeology.
Research and define the structure for new data models we launch (schemas, interrelations with other models, how to standardize each across dozens of systems, etc.).
Write detailed documentation (e.g. runbooks, FAQs) explaining source systems, data models, and API features for internal reference and for our customers to use self-service.
Troubleshoot ad hoc issues with integrations and data models, helping our software engineers debug and resolve errors, and unblock our customers from launches and expansions.
Build and own customer and partner relationships. Work end to end with both software startups and construction companies, from sales/demos to scoping requirements, from onboarding to roll-out.
Translate customer needs to detailed product requirements our software engineers can code against.
Assist sales team in customer demos, showing product functionality, refining customer requirements, and driving toward winning their business.
No need to have: prior experience with Construction or at B2B SaaS/dev tools companies
REQUIREMENTS
Hands-on: you'll be a full-time builder, not a manager. You must love operating in the messy weeds of nuanced systems, understanding their complexity and simplifying it for our customers. You will focus on product execution and delivery, less on strategy and market research.
Technical: no need to code, but you must have at least 1 year experience working closely with APIs, databases, SQL, Postman, and similar tools. The more, the better.
1+ year experience in software: at least 1 year of full-time experience working for a software company in a data analyst, product, or other technical role. We’re open to exceptional new grads with substantive internships. We want someone hungry and has lots of room to grow, who's ready to roll-up their sleeves and operate in the trenches.
High ownership + conscientiousness: able to manage many threads at once without sacrificing quality.
Meticulous attention to detail: structured thinker who nerds-out on nuances, accounts for edge cases, and tests your work thoroughly before calling it done.
Clear + concise communication: oral and written, must love writing crisp docs for internal + external reference.
Uncanny ability to deliver results: get the job done consistently, doing any task needed to deliver on time.
Comfortable wth customers: able to work with a wide range of customers, spanning software engineers at startups to CFOs at specialty contractors. Can onboard new customers, run demo meetings, negotiate timelines, and communicate clearly over Slack, Zoom, and email.
In-person: pumped to work in-person in SF 5 days per week.
Nice to have:
Experience interfacing with customers (e.g. running user interviews, demoing SaaS products).
Experience building technical products (e.g. APIs, developer tools) alongside software engineers and shipping products on tight timelines.
Knowledge of basic accounting, since many of our use-cases relate to automating financial workflows.
BENEFITS
Healthcare: we cover 90% of your healthcare costs with several plan options.
401k: we match 100% of your contributions, up to 4% of annual salary.
Workspace: $1,500 to spend on items like chairs, desks, monitors, etc.
Relocation: sizable relocation bonus for folks currently located outside of the Bay Area.
Gym: on-site gym with Peloton, squat rack, Tempo, Yoga setup, and more.
Visa: we sponsor Visas (H1B, TN, etc.) for candidates who are a good fit!
About the interview
At each stage, we decide and update you within 24hrs:

Intro (15min.) [Virtual]: informal chat for you to learn more about the role. We'll ask for details on your past projects and what you're looking for next. We want to know that you meet our basic requirements and can speak about your work clearly. You’re welcome to ask lots of questions about whether working at Agave makes sense for you.
Writing Exercise (30min.) [Virtual]: we provide a short prompt that you reply to in a Google Doc. Our goal is to quickly decide whether you can write clearly, with minimum time investment required from you.
Experience (30min.) [Virtual]: we'll dive into the details of your recent work experience, asking questions to learn about what you've done. Our goal is to ensure you've worked on sufficiently complex projects to confirm you'll be successful if you join us full-time. We'll also reserve 10min to answer any questions you have about Agave.
Case Study (60min.) [Virtual]: we'll provide a product-related case study that you'll prepare asynchronously. You'll submit your response and we'll review it with you on a 60min call.
On-site (60min. x 5 people) [In-Person in SF, we pay for travel]: you'll interview with each co-founder and our lead dev. This will be a deeper dive into your experience, technical fluency, and overall fit. Each interview is 1hr, 45min for our questions and 15min for yours.
About Agave
We build data infrastructure (APIs, financial automation) for construction, an unsexy-but-huge ($12T) industry. We help construction software companies integrate with the fragmented and old software that runs construction globally using our API. We help construction companies automate manual work in a no-code interface powered by our own API.

Our founding team has worked together for 10 years, first at Graphiq (acq. by Amazon) then at Amazon. We've raised $3M from YC, Accel, the founders of Plaid, and execs at Procore, Autodesk, PlanGrid, and Aconex.

Visa: we sponsor Visas (H1B, TN, etc.) for candidates who are a good fit!

In-person: pumped to work in-person in SF 5 days per week.

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