DRYFT Dryft builds intelligent systems that automate complex human decisions in manufacturing operations. We’re a small, talent-dense team with modest roots and a love for the physical world - cars, machines, planes. Our team includes graduates from Stanford, Berkeley, CDTM, TUM, winners of Stanford TreeHacks, recipients of Fulbright & Haniel scholarships, and builders of everything from robots and race cars to software with millions of downloads. We’re backed by the founders and leaders behind Amazon, Facebook, Stripe, Applied Intuition, & others; General Catalyst & Neo, and board members of global industrial companies. Today, we’re already saving customers millions. But this is only the beginning. ERPs ran the physical world for half a century. Dryft is powering the next.
THE ROLES Founding Fullstack Engineer: https://jobs.ashbyhq.com/dryft/352183c7-98bc-4626-bc80-b13cf... Founding Design Engineer:https://jobs.ashbyhq.com/dryft/572fe2dc-1f15-476e-9e1b-df60d...
TECH STACK FE (TypeScript): React, Chakra UI v3, TanStack Router, TanStack Query, Vite BE (Python): FastAPI with Pydantic v2, SQLModel, Postgres with pgvector, dagster AI: Pydantic AI, Langfuse
Miniswap is a marketplace for complex hobbies, starting with Warhammer. We're backed by Y Combinator and have just closed our seed funding round. In the past six weeks since we launched, users have listed $150,000 of tabletop wargaming miniatures for sale on Miniswap and over $15,000 have been sold.
We're looking for a founding full-stack engineer who is passionate about their hobbies -- whether it be Warhammer, Magic: The Gathering, mechanical keyboards, fountain pens, you name it.
We have an opinionated tech stack: deep use of PostgreSQL (composite types, functions, etc), Rust for our monolith, and HTMX with modern vanilla JS/CSS. Our mentality is to extract the utmost value we can get out of these technologies before introducing additional infrastructure and frameworks. No ORMs, npm, React, etc. If this prospect excites you, please reach out :)
Previous professional Rust experience is not a strict requirement for the role.
Compensation: $100-180k + 0.5%-2% equity
Contact: zak@miniswap.gg
Vo to satellite and drone imagery is on the rise, while traditional image processing methods struggle to keep up. Our scalable AI platform enables custom model training on global features, providing real-time, on-demand geospatial insights with impressive speed and accuracy. We are turning months of manual work into mere minutes, and with much better results. We work with customers from various domains, from intelligence and defence, local and federal governments, to small and large enterprises, which requires us to have a lot of flexibility in how we deploy and maintain our services.
We kicked off in 2020 and have secured $35 million in series A funding from a lineup of top US and European investors, including Microsoft M12, Point72 Ventures, Maxar, In-Q-Tel, SAFRAN, and ISAI/Capgemini.
Tech Stack: Python, Fast API, PyTorch, Postgres, Redis
Infrastructure: Kubernetes & Docker, Linux, AWS & Azure, Azure DevOps, Terraform, ELK, Prometheus & Grafana, ArgoCD & Helm
Roles:
Senior Software Engineer - Data Plane Team: https://jobs.eu.lever.co/blackshark/17fbf310-ea37-435f-a198-...
Senior DevOps Engineer - Deployment Team: https://jobs.eu.lever.co/blackshark/b8997cb0-532e-444c-b18d-...
Freetrade is a commission-free investing app used by over 1 million people in the UK. Our team is expanding, and we’re seeking software engineers to evolve and scale our core investing platform. In this role, you will be instrumental in building and maintaining reliable and trustworthy systems for trade execution, clearing and settlement, asset servicing, and internal operational tools. You will also play a key role in shaping our technical direction and mentoring other engineers as our team grows.
Tech we use: TypeScript, Node.js, Postgres, and GCP
Note: We are three days in the office
We don’t sponsor visas at the moment.
We are hiring across the board in engineering, data, people, marketing, risk & compliance and finance.
See all of our opportunities here: https://freetrade.io/careers
ChainSecurity is a young and innovative cybersecurity company that operates in the blockchain and cryptocurrency space. Our mission is to make the blockchain space secure and trustworthy for people, companies, and governments alike. We are proud of our security experts from the renowned universities ETH Zurich, EPFL Lausanne and others. We are trusted by 100+ blockchain companies and established corporations with security audits and services. We have secured complex systems for top blockchain clients, such as decentralized finance (DeFi) projects, and multinational organizations, such as banks and industrial consortia.
A ChainSecurity Auditor will review the most complex blockchain projects to find vulnerabilities which no-one else can. By using state of the art tools, expert knowledge and a deep understanding of the fundamentals, we secure projects handling billions, often forming the foundation in the new paradigm of an open financial system.
Your Responsibilities:
* Work directly with the developers of the most successful teams in the blockchain industry to audit their code and secure their products
* Contribute to our security tools and create new ones in collaboration with our internal research team
* Conduct security research and publish your findings
Requirements:
* Strong background in software engineering, focused on security relevant areas and most importantly being able to reason about complex code
* Experience with penetration testing, vulnerability scanning, threat modeling or similar is a plus
* Good knowledge of cryptography
* Proficiency with Linux and Git
* Good written communication skills
* Fluent in OOP programming language
Bonus Points:
* Formal Verification, White Box, Vulnerability Scanning
* Solid Blockchain Knowledge
* Consensus Algorithms
Join us here: https://www.chainsecurity.com/jobs/blockchain-security-engin...
Questions about the role? Contact: jobs@chainsecurity.com
About the company:
• Technical founding team with relevant industry experience
• Backed by well-known European VCs (SpeedInvest + Galion.exe)
• Cloud native & freedom to shape our tech stack (TypeScript + Python)
Ideal candidate:
• Previous experience at start-up building tech at scale
• Thinks in terms of product functionality and customer demands not just features
• Familiar with API first practices and frameworks
• Bonus points if you are an ex-founder or have been first hire before
Moyai is an AI-powered agent monitoring tool for AI engineers looking to catch agent failures in production. Reach out to the founder directly: https://www.linkedin.com/in/rhommes/ or visit our website https://moyai.ai
*No agencies or recruiters, and we are unable to provide visa sponsorship
We build repricing software that keeps online sellers on top of their competition on 130+ marketplaces.
Stack: Python, Postgres, FastAPI, SQLAlchemy.
Our office is beautifully located in Mauritius. We sponsor visas and handle all relocation/immigration.
Apply: jobs@multiply.cloud
Rapport is fixing healthcare's broken payment infrastructure. Hospitals lose billions annually to opaque payer rules and outdated contracts. We're an AI driven platform that ingests contracts, claims, and policies at scale, transforming them into real-time pricing intelligence to help get providers paid what they deserve.
We are backed by top tier investors and already have one of the largest RCM operators in the country as our development partner. Founded by a healthcare tech veteran with two prior exits. This is a chance to be a true founding team member with meaningful equity and direct impact on product and company direction.
Role 1: Founding AI Engineer – Claims Pricing Intelligence Build production pricing engines that transform messy healthcare data into accurate claim prices. Think of it like playing a complex game: interpret intricate payer rules, combine them into working logic, and validate at scale. Design data pipelines for PDFs/CSVs/APIs, create business logic combining rules based systems with ML validation, and build explainable systems where every decision is traceable. Thanks to our partnership, you'll work with massive real world datasets from day one. Stack: Python, SQL, FastAPI, LLMs and Agentic frameworks.
Role 2: Founding Data Engineer Architect our data platform from scratch. Build fault tolerant pipelines using Databricks that handle diverse sources, design normalization layers for healthcare data, and implement observability for production reliability. First data hire, you'll shape our entire data strategy. Stack: Python, SQL, Databricks, Azure/AWS, Airflow/Prefect.
Rapport is a remote only company with quarterly in person sessions. Significant equity + competitive compensation.
Apply: hiring@healthyrapport.com with resume or LinkedIn.
Please note we are unfortunately unable to sponsor visas or hire candidates outside of the US at this time.
EnergyHub | Engineering Manager | Full-time | REMOTE (US)| Salary $195k
Other roles include Front End Engineer, Senior Software Engineer and more.
See all our open roles and apply here: https://grnh.se/30f1ece22us
Want to work on helping to decarbonize the electric grid and transportation in the US? (the two biggest sectors for impact)
Want to do it at scale? (we control over 1.9 million devices across the US making up over 3 gigawatts of electrical load for utilities that service 1/3rd of the entire US population)
Come work with me building some of the largest VPPs (virtual power plants) on the planet at EnergyHub. (What's a VPP? See page two of https://kevinjkircher.com/wp-content/uploads/2025/03/DOE-LPO...)
EnergyHub’s software makes it easy for millions of smart device owners to partner with their utility and help decarbonize the grid. Our platform lets consumers turn their smart thermostats, electric cars, EV chargers, batteries, and other products into virtual power plants that keep the grid stable and enable higher utilization of solar and wind power. You’ll be a part of building the tech that’s at the center of it all.
All roles are remote but if you like offices we have them in Brooklyn, NY and Burlington, VT.
Note that we can NOT sponsor visas at this time.
PrairieLearn (https://www.prairielearn.com) is an open-source assessment platform used by universities across the US (Berkeley, Princeton, Michigan, Illinois, and others). We power mastery-based learning and large-scale exams.
We’re a small, profitable, early-stage company (bootstrapped, no VC) and we’re hiring full-stack engineers to help us continue to grow. You’ll work across the stack and have meaningful ownership from day one.
We’re also developing AI tooling in the product, including LLM agents to help instructors create content, and vision-language models to help grade student work. This is practical, user-facing AI work with real-world impact — not a research sandbox.
Tech we use: Node.js / TypeScript backend, Postgres, AWS, React. PrairieLearn is open core: https://github.com/PrairieLearn/PrairieLearn
Details:
- Location: Remote (US only)
- Salary: $100k+ depending on experience
- Benefits: Stock options, unlimited PTO, flexible hours
- Role: Full-time. (We’re not able to sponsor visas at this time.)
If this sounds interesting, please email jobs@prairielearn.com. We’d love to talk.
Official job posting: https://www.prairielearn.com/jobs
BuildBetter is the product operations platform for customer-led teams. We've built an AI-first product that lets our customers, like Rappi, n8n, Posthog, and Brex automate the operations work that lets them provide their customers with world-class product experiences.
We're looking for two senior engineers to join the team; our headcount has remained small while growing revenue, and we're now bottlenecked by development speed in a way that will make you invaluable. You'll have real ownership over your code from product ideation to customer support, and we'll be making substantive product updates weekly. We're looking for team players who are as fun to work with as they are productive, and are willing to compensate these two rolls commensurately - our aim is to be in the 95th percentile of equity compensation, and we expect that in exchange we'll have value-aligned employees who will help us grow the business.
Joining us will mean solving hard problems at the frontier of AI adoption, including:
- maintaining performance at scale
- building and maintaining rich frontend user experiences that maintain the standards of usability and delight that our customers know us for.
- building agent and workflow systems that automate real work for customers
- playing around with the latest models to figure out new experiences that we can offer our customers as cutting-edge models get released monthly
- building automation that's grounded in supporting product teams rather than automating them - our bet is that this is the likelier outcome out of the current generation of AI systems
Stack: Postgres / TS (Nest + React) / Hasura / EKS / S3 / LLM APIs / Python
Benefits:
- unlimited PTO
- $100/mo education stipend
- flexible hours: we measure productivity in terms of outcomes, not time, so as long as you're able to stay aligned, productive, and in regular communication, we don't really care what hours you work
- health insurance
Please reach out to: nikhil (at) buildbetter (dot) app
Stellar is building the go-to AI voice agent platform for customer support, enabling incredibly human-like customer service over the phone. We're a young and rapidly growing startup that has already proven traction, with a number of well-known companies among our initial customers.
To see some of our AI voice agents in action, see https://www.stellarcs.ai/demo-showcase
We're looking for founding software engineers to help us scale Stellar's platform globally. As one of the first members of our engineering team, you’ll play a key role in Stellar's journey and have the opportunity to help shape our architecture, engineering culture and product and engineering roadmap.
Tech stack: Go, Node.js, Typescript, React, Next.js, Encore Cloud, GCP
What you’ll do:
- Build performant APIs and backend services in Go and Typescript (Node.js)
- Develop Stellar's frontend in React, TypeScript and NextJS, to allow companies to effectively design, test, deploy and monitor their AI voice agents
- Design a scalable, fault-tolerant system architecture that can handle large volumes of concurrent real-time audio conversations & agent interactions while maintaining low latency
- Work on Stellar's AI agent framework, at the intersection of software engineering and AI engineering
- Design and implement a platform that meets enterprise standards in terms of security, compliance, resilience and data privacy
- Build API integrations with external systems to enhance the capabilities of Stellar's agents
- Help shape the early engineering culture as one of the first hires of a young and growing tech startup
Why join: you'll be joining at a pivotal time in our growth, in a role with a high degree of ownership and strong growth potential. Join a small but talented team, coming from high growth startups and scale-ups such Framer, MessageBird and Adyen.
More details about the role here: https://www.stellarcs.ai/careers/software-engineer
Apply: Send us an email at info@stellarcs.ai, and mention you came from HN. Note that we do not provide visa sponsorship, and will only proceed with candidates who are able to work from our office in Amsterdam (~4 days in-office per week)
Our mission: making cities usable. Award-winning navigation app.
Read more about Citymapper For Cities: https://ridewithvia.com/solutions/citymapper
- Engineering Manager or Director (London): https://job-boards.greenhouse.io/via/jobs/8001882002 - Director of Engineering (London): https://job-boards.greenhouse.io/via/jobs/8074378002
This and more roles - see: https://job-boards.greenhouse.io/via
Tech stack: AWS, Python, some C++, some Rust, EKS, Terraform.
We are consistently hiring backend engineers ranging from Senior level to Staff / Lead / Director / Principal Go engineers. If you have experience with a different tech stack, we offer a 10-week onboarding program to train you in Go, scaling and other key topics: https://tinyurl.com/2u5x9f9w
We’re also hiring for:
* Staff Python Engineer – (Open Source Video/Voice AI Library)
* Senior Solutions Engineer
* Staff Backend Developer (Go)
At Stream, we use Go for our video SFU, chat API, Moderation and Feeds, serving high traffic from major apps like Strava, Nextdoor, Patreon, and Midjourney. Our tech stack: Go, CockroachDB, RocksDB, WebRTC, Raft, and Redis.
Why Join Stream?
* High scale/ difficult engineering, we have customers using our products with millions of users
* Default alive. Startup growth opportunity with healthy revenue
* All managers are hands-on and capable engineers
* Edge network of servers around the world
* Great opportunity to learn and grow
Remote: our roles are primarily NL, US, North Macedonia, or CA-based (hybrid), but exemptions for remote work within the EU may apply to specific cases.
Visa Sponsorship: Available for the Netherlands
Apply here: https://jobs.ashbyhq.com/stream?utm_source=5rrpvObp3r
Tracebit is an Accel backed, UK founded security product company taking a new look at canaries for intrusion detection.
We work with some amazing companies (Docker, Riot Games, Synthesia, Zepz...) to help detect threats in cloud and enterprise.
We're hiring:
* Founding Engineer | London | £60-120k + generous equity | Relocation & Visa sponsorship available
* Founding Security Researcher | Remote | £100-140k + generous equity
* Founding Account Executive | New York | $180-200k OTE + generous equity
* Founding Sales Engineer | New York / Remote | $180-220k OTE + generous equity
Learn more and apply: https://tracebit.com/careers#section_open-positions
Tendavo helps SMEs win public procurement tenders - a massive, neglected market. We are bootstrapped, profitable and have around 100 happy customers without taking a dollar of external investment. We are based at the SSE Business Lab, where companies such as Klarna and Legora originated.
We spent the last year validating PMF. The CTO has built the core foundation, and now we are hiring a Founding Engineer to architect and code the rest of the platform side-by-side.
The Team: CEO: ex-McKinsey | CTO: +13 years of startup experience, previously founded a data startup scraping 50m pages/week.
The Role: You will work side-by-side with the CTO to build the platform from the ground up. You get full technical ownership to design agents and LLM workflows that replace our manual routines. This is a high-agency role: We have validated Product-Market Fit; your job is to scale it.
Tech: Python (AI & core systems), PostgreSQL, TypeScript, GCP
We offer equity, mentorship from a technical team, and a clear path to VP/Head of Engineering.
Reach out to me directly at tom.dickson@tendavo.se - we'd love to hear from you!