Castleton Tower is a boutique consulting firm founded by executives who have built and led quantitative research, data science, and technology teams at top-tier hedge funds and asset managers. We work with investment management firms (asset allocators, asset managers, hedge funds, family offices, and RIAs) helping them modernize their data infrastructure and build AI-ready foundations.

We're looking for smart, motivated, high-agency people with similar backgrounds in either data engineering or investing.

The two highest priority roles we have open are both data engineering roles: one junior role in the Northeast US, and one senior role in the Bay Area. Both have in-office requirements and can be found here:

Northeast: https://jobs.ashbyhq.com/castletontower/dbfd792b-6044-4e06-8...

Bay Area: https://jobs.ashbyhq.com/castletontower/05efebc0-25f2-45ca-8...

Lantern is building AI-powered revenue intelligence—autonomous agents that turn cold outreach into warm conversations. We detect buying signals across your tech stack, prioritize opportunities, and help B2B sales teams focus on deals that actually close. We're early, agentic-first, and moving fast.

Senior Software Engineer: You'll own complex technical problems end-to-end—translating customer needs into scalable architecture, optimizing AI model efficiency through prompt engineering, and shipping features that directly impact how revenue teams operate. We want bold ideas and people who push boundaries.

Junior Software Engineer: You'll work across our stack (Python, FastAPI, Next.js, React) alongside senior engineers, contributing to real features from day one. Great fit if you're hungry to learn, ship fast, and grow with a startup building cutting-edge agentic systems.

New Grad Software Engineer: Entry point for recent grads excited about AI and agentic systems.

You'll get hands-on experience with our modern data stack (Postgres, ElasticSearch, ClickHouse, DuckDB), Kubernetes/AWS deployment, and Temporal.io, pi.dev, context engineering, workflow orchestration while shipping production code.

This role is based in our Manhattan office (4 days/week in-person). Full health and dental coverage.

Apply: https://forms.gle/kEi5MDDiaJKdyN3fA or email maksym at withlantern.com with your resume.

DrSwarm is building AI-driven workflow automation for healthcare clinics / health systems (scheduling, RCM/billing workflows, patient ops). This is a true 0→1 role: ship fast, talk to customers, own systems end-to-end.

You will: - Build product end-to-end (Next.js + Django) - Ship integrations + workflow automation (APIs, webhooks, background jobs, queues) - Own reliability (logs/metrics, retries, failure modes) and pragmatic security (HIPAA-aware)

Stack: Next.js, React/TypeScript, Django/Python, Postgres, Celery/Redis, Docker, AWS/DigitalOcean, LLM APIs.

Looking for: Strong full-stack builder. Good to work with. Can talk to customers / users / salespeople. Uses AI to generate 90%+ of their code, interested in AI + Healthcare.

Comp: Market with mix of base + bonus + meaningful equity Process: 30m intro → 60m technical/product deep dive → short paid work trial → references. I (founder) read every email and reply.

Contact: jobs@drswarm.com (include “HN Founding Engineer” in subject) + GitHub/LinkedIn + 2–3 projects you’re proud of.

Makeship empowers influencers, creators, and brands of all sizes to develop and launch limited-edition products that matter to their fans. We handle the design, manufacturing, and fulfillment (plushies, apparel, and more). Check out our site (https://www.makeship.com/) to see some of the anime and gaming merch. We're profitable, did $65M+ CAD in sales last year, and have been Great Place to Work certified three years running.

Two open roles: Senior Software Engineer, full-stack (React/Next.js + Go) on the core platform. You'll lead projects, own complex features end to end, make architectural calls, and mentor other engineers. https://makeship.bamboohr.com/careers/76

Staff Engineer, Systems & Integrations, owning our internal systems and the integrations layer connecting Shopify, HubSpot, Airtable, and others. You'll own the roadmap and work directly with ops, sales, and marketing to make their workflows dramatically more efficient. https://makeship.bamboohr.com/careers/78

If you apply, please note that you found us through Hacker News.

Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. We strive to design and build step-function improvements over existing blockchain solutions. After raising $225M in series A funding, led by Paradigm, we are growing our team.

Senior Software Engineer, Compiler: https://jobs.ashbyhq.com/category-labs/e5c34899-cea1-4d25-be...

We build the evaluation datasets and RL environments that make AI reliable where mistakes are expensive: finance, healthcare, and legal. We design expert-curated training data, calibrated rubrics, and RL environments for frontier AI labs and startups pushing the frontier of what models can do.

We're a small London-based team running multiple active projects, so what you ship gets used immediately by labs, startups and internal domain experts. We recently launched SpreadsheetBench v2 and work on ultra long-horizon tasks.

We're hiring:

* MTS, Applied AI — design the next benchmarks and RL environments — https://jobs.ashbyhq.com/aptura/c299e1f2-cdb4-4842-b5f3-8aa6...

* MTS, SWE / Product — build the platform behind every dataset — https://jobs.ashbyhq.com/aptura/cd6b6df2-1a75-442e-83b3-2ae0...

We’re a global media network, digital consultancy, and product studio helping companies grow through technology and distribution at scale.

Now hiring:

Brand Strategy Director (Leadership Role, Remote, Worldwide) https://wetheflywheel.com/en/careers/brand-strategy-director...

AI-Native Tech & Growth Director (Leadership Role, Remote, Worldwide) https://wetheflywheel.com/en/careers/tech-growth-director/

Brand Visibility Lead (Remote, Worldwide) https://wetheflywheel.com/en/careers/brand-visibility-lead/

Entry-Level Growth Marketer — Next-Gen & AI (Hybrid Role, Ho Chi Minh City-based) https://wetheflywheel.com/en/careers/growth-marketer-saigon/

Column is building the infrastructure that powers the US dollar globally. We're a software first company, but also own a nationally chartered bank that we've built from the ground up. We're currently processing trillions of dollars annually (yes, that's with a T), supporting some of the largest and most sophisticated companies out there like Wise, Bilt, Brex, Ramp, Mercury and dozens of others.

Started by the founder of Plaid (plaid.com), Column is focused on keeping an extremely lean and experienced team: currently 10 engineers that all report to the CEO (many of whom we hired through HN). We are looking for an ambitious infrastructure, product, and backend engineer (one of each) that want to build incredible software from first principles.

Profitable and 100% owned by employees and founders.

Apply here: https://column.com/careers

Feel free to email me with any questions: praful@

Hi all, I’m Yuriy, founder of Puma.tech. Prev. worked at Cloudant (YC S08), Meteor (YC S11), Parse (YC S11, Facebook/Meta), and explored AI/ML (computer vision for self-driving cars).

We have 2 products:

1. https://PumaBrowser.com: iOS & Android mobile browser with built in LLMs & wallets – private local alternative to ChatGPT. 1m+ downloads.

2. https://PumaAI.com: small research lab focused on privacy and reliability of AI based on our experience building Puma Browser.

Open Roles: Eng (iOS/MacOS, Android, Ai/ML, Browser Extensions), Based Social Media Intern; Internships: Eng, Design, Growth

We’ve raised a few rounds from some of the best builders in ai and crypto:

Protocol Labs (YC S14), Chris Larsen (Ripple), Anatoly Yakovenko (Solana), Illia Polosukhin (NEAR Protocol), Sridhar Ramaswamy (Snowflake CEO), Jason Warner (poolside.ai, ex-GitHub CTO), Don Ho (Orange DAO, Quantstamp W18), Evil Rabbit (Vercel), John Phamous (SF Compute) and other amazing builders.

How to Apply: email careers+hn [at] puma.tech with your GitHub, a note on what you're most proud of building and what you'd like to build next.

Thank you!

Pango is building the world's first Agentic Operating System for e-commerce logistics. Our vision is to create the AI e-commerce employee of the future. We are forming our core team in Stockholm and are looking for exceptional engineers. We are backed by some of the most some of the most prominent investors in the world. In less than a year, we have seen massive growth where we can't keep up with the demand and need engineers to bring the product faster to the market.

You are a good fit if:

* You are comfortable maintaining, expanding and operating an entire B2B SaaS platform with a high sense of ownership.

* You have previous experience working at a SaaS product company as a founding or senior engineer

* You are unafraid of any technology, and are willing to go out of the comfort zone to use the best tool for the job

* You have strong proficiency in any backend language or platform with a strong willingness to dive deep into PHP/Laravel OR strong proficiency in JS/React.

* E-commerce (Shopify, Magento, other platforms, shipping carrier integrations) experience is a plus.

You will take a key role in shaping the product and company, with ability to make an impact and advance career limited only by your aptitude and interest.

Reach out to Steve@pango.ai if you are interested or have any questions. We review applications immediately and move quickly.