React Jobs

Regal is the AI Agent Platform — we power millions of outbound/inbound calls, SMS, and email interactions for enterprise customers like Google, AAA, and Coursera. $82M raised, $7B in revenue driven for customers, 250M+ calls completed. We're hiring …

Hiring software engineers who enjoy solving real-world problems and working close to hardware. Candidates should learn new domains quickly and prefer practical solutions over unnecessary complexity. Projects include scientific tools; automation & ro…

Breezy is hiring an AI Product Engineer to build product capabilities across their platform for residential HVAC field service software. Work across the stack (TypeScript, React, Node.js, PostgreSQL), incorporate LLMs and automation, and use AI-assi…

Loop is a fintech/payments company based in Toronto building infrastructure that moves money. Hiring Senior Frontend Engineer (own the user-facing product experience; strong React skills) and Senior Backend Engineer (work on the core payments platfo…

Jurisphere is building an enterprise-grade Legal AI platform used by top law firms in India and the US. We are building product and systems infrastructure around legal workflows, document intelligence, review systems, and AI-powered execution. Engin…

Atomic Tessellator provides computational infrastructure for advanced materials for defence and aerospace. Hiring multiple roles (including Lead Engineer - Front-end and Lead Engineer - LLMs). Roles are remote; candidates should be within ±4 hours o…

Spruce is a VC-backed startup (founded early 2024) building software for heat pump installation businesses across the UK. The role involves owning slices of architecture and technical strategy, writing high-leverage code on critical paths, mentoring…

Weave Bio is a Series A (<50 person) regulatory AI SaaS startup building an AI-native regulatory automation management platform for novel therapeutics. Hiring multiple positions including Senior/Staff Backend (Django, Python), Senior/Staff Frontend …

Shorebird is a startup building services for businesses using Flutter. The company serves hundreds of millions of devices from its cloud (2k+ RPS sustained) and is built mostly in Dart on Google Cloud and Cloudflare. They are launching a series of C…

Founding-stage fullstack engineer role at Rivet, an AI marketing platform for artists and creators. One of two founding engineers; hiring to expand the engineering team to three. Looking for scrappy, adaptable fullstack developers with demonstrated …

Build state-of-the-art 3D data annotation tools for autonomous driving. Seeking a seasoned UI engineer with a strong React background to build highly stateful, low-latency interactive applications. 3D graphics experience is a plus. Full-time, onsite…

Collective Intelligence Project builds platforms for public participation in decisions about AI systems and partners with AI labs and governments to evaluate frontier models on complex real-world questions. The Lead Product Engineer will build infra…

Adalat AI is building AI solutions to transform India’s judicial system, deployed across 10 states and launched at the Delhi High Court. Hiring for Fullstack Engineers (5+ YOE) to own end-to-end features using React/Next.js and Go with Postgres; a F…

Careforce AI is building autonomous AI agents that eliminate the manual administrative burden in healthcare (fax machines, scheduling, calling). We find, call, and schedule patients, breaking interoperability barriers that have plagued the industry …

Decise is a hands-on advisory and delivery firm working with executives to define and build software, data platforms, analytics, and customer-facing products. The role is a principal-level technologist who moves between engineering, architecture, an…

PermitFlow builds software to streamline construction permitting across thousands of U.S. municipalities. YC W22 company that recently raised a $54M Series B. Hiring NYC onsite for Staff Software Engineer, Fullstack Software Engineer, and Senior Fro…

Brico automates financial licensing for Financial Institutions and FinTechs, handling license applications, maintenance, and renewals across 50+ US jurisdictions. Series A company based in San Francisco, CA. Revenue has grown 600% over 2.5 years wit…

Trunk is an a16z funded (25M) Series A dev tools startup redefining software development at scale. Their mission is to help teams create high-quality software quickly by addressing downstream bottlenecks like merge conflicts, flaky tests, and incons…

Trayd is building the financial operating system for commercial construction, replacing spreadsheets and legacy software with a single platform that automates payroll, union compliance, time tracking, and job costing. Construction payroll moves ~$26…

Fullstory provides privacy-preserving session replay and analytics for web and mobile apps. Current engineering roles are semi-onsite in Atlanta (1 day per week in office). Open roles include multiple software engineering positions as well as sales,…

Colonist.io is a multiplayer web strategy game. Role involves owning features end-to-end, from backend game logic to polished UI; work on evolving game architecture, improving code boundaries and scalability. Small team, heavy use of AI tooling to s…

Founder-led, people-first, boutique indie tech agency building a fully-remote team (some clients offer onsite). Leadership includes ex-Fortune 100 staff; everyone touches code. Notable projects include internal tools for Anduril and voltagepark.com.…

Building automation software for the $7T insurance industry, accelerated by AI. Seed-stage in headcount (~20 people) but Series B in business traction and cash-flow positive. Experienced engineering team from Airbnb/Brex/LiveRamp. Role is onsite in …

Founding technical operations lead for an AI-native clinical data platform. Responsibilities include owning CI/CD, QA, testing infrastructure, compliance documentation, and performing ~30-40% independent feature development. Must be actively shippin…

Tangible Materials helps the construction industry make better decisions around building materials by using less and better materials. They use AI to parse complex construction documents to estimate quantities, track design decisions, and detect ove…

Littlebird is your AI-powered personal operating system. We capture context from your daily life -- meetings, messages, browsing, notes -- and use it to help you remember everything, prioritize your day, and solve real problems. If you get excited a…

We are looking for an experienced Full-Stack Software Engineer to work with us on an upcoming project for a large humanitarian organisation. Required: Python, React, AWS, Postgres. The place of work is London, UK but we're open to remote applicants …

Instinct Science is an AI-driven veterinary medicine platform combining a cloud-native EMR with real-time clinical decision support. Responsibilities include owning projects from scoping through release, building full-stack features with Elixir (bac…

Findigs is transforming the rental experience by building high-scale applications to streamline renting for millions. The company fosters a collaborative culture with high ownership and autonomy, taking features from concept to deployment. Roles are…

Innolitics builds AI/ML software for medical devices — the kind that detects ear infections, tracks metastatic cancer, and plans radiation therapy. 60+ FDA clearances. We're a remote-only firm (since 2012) that does engineering, regulatory, and cybe…

We’re building the biggest bike shop in the world. Upway is the leading marketplace for refurbished e-bikes across Europe and the United States. In 3 years, the company grew from 0 to $200M GMV. The tech team grew to ~12 engineers in 2025 and plans …

Confido Legal is a fintech platform enabling legal tech companies and law firms to embed payments and finance features. Hiring a senior software engineer to own security across the platform while remaining an active product-contributing engineer. Re…

Neocom is a digital shop agent for online shops. Customers can chat naturally, get clear guidance, and find the right product faster, just like talking to a great salesperson in a physical store. We've been in the guided selling space for the past 6…

Journee is a technology startup founded in 2020. Our in-house low-latency streaming technology and GPU fleet orchestration systems power work with brands such as BMW, H&M, and Siemens. We are building and launching Ojin, a real-time generative AI pl…

AI 初创公司 ILLUCIO 正在招募一位自我迭代速度极快的全栈工程师，负责将产品洞察与体验落地为安全、稳固、可规模化的系统。公司以 AI 学习工具为主，关注文本形式的革新与心流式学习体验，已上线并在短期内获得用户与付费用户、6000+ 粉丝账号与融资。创始团队成员分别近期基地为北京/上海与新加坡，欢迎现场 coffee chat。

Join us in pioneering the future of e-commerce search. 1M+ MAU growing rapidly. Large seed round raised from top-tier VCs and individuals with backgrounds from Google, Amazon, OpenAI, Stitch Fix, Whatnot, Stripe, and more. We're a hard-working team …

Small scientific software development company building custom scientific and engineering analysis applications in domains including space situational awareness, image simulation, high power microwave systems, modeling and simulation, laser systems m…

Building alphaLENS, a suite of tools for professional market research and trading. Public registration opens soon. Role involves working on a small team, focusing on frontend engineering with heavy emphasis on testing and performance. Expect to work…

Building a continuous performance optimization platform to catch performance regressions with sub-1% measurement variance. Trusted by teams at Cloudflare, Vercel, Mozilla, Pydantic, and Astral. Small, deeply technical team offering ownership; compet…

We just crossed $11M ARR and 5,000 customers -- all therapists and mental health providers who trust us to run their financial back office: bookkeeping, taxes, payroll. Now we're building AI-powered CFO for therapists -- a layer on top of our ledger…

Journalytic is an early-stage company building a mission-critical operating system for professional investment teams. We combine behavioral science, structured workflows, and well-crafted software to help hedge funds, family offices, and RIAs make b…

We're a fast growing profitable SaaS that helps stores sell Pokemon cards (and other tcgs).

We’re building Topliner, an AI-powered platform for executive search. Requirements: 5+ years full-stack experience; Fluent English; Exceptional quality standards. Compensation: $80k/year; Remote; Part-time → full-time path; Equity potential.

Building an AI notetaker and task management tool for financial advisors. Startup headquartered in NYC. Location: St. Louis or NYC; if not in NYC, quarterly travel to the office is expected. Tech stack: Front end React; DB Postgres; APIs Golang, Ely…

Empire Flippers is a global-remote company and a marketplace for buying and selling online businesses (typically 5 to 8 figure USD range). Employees are distributed across multiple continents and timezones. The company is hiring for several technica…

We’re building one of the fastest-growing AI entertainment platforms in the world—20M users in year one and scaling to hundreds of millions. You'll be one of our early hires and own core product and infrastructure decisions. Tech stack: TypeScript, …

Goody is building a gifting product and developer commerce API used by customers like Google, Stripe, Anthropic, Meta, NBCUniversal, and Notion. Hiring multiple full-stack engineering roles for 2026 scale: Staff Software Engineer and Senior Software…

At akeno, we help chemical manufacturers optimise production planning in large factories (asset utilisation, dependency graphs, real-time data, critical processes). Hiring 1x Senior/Staff Fullstack Engineer, 1x Senior/Staff DevOps Engineer, and 1x S…

Sitewire | Full Stack Engineer | Full-Time | REMOTE (US-only). Learn more or apply at https://wellfound.com/l/2zf9K9 - I personally review every application, so just mention you found us on HN. Sitewire is a simple yet powerful construction finance …

Level builds a modern Remote Monitoring & Management (RMM) platform for IT teams and Managed Service Providers. We help IT professionals monitor devices, automate workflows, remotely support users, and leverage AI to operate more efficiently. We’re …

We are applying AI to organize corporate events. We are looking for a senior engineer with at least ten years of full stack experience, a strong focus on product and UX, and optionally some experience building LLM based products. Currently we are fo…

We build agents that companies can deploy for computational research. In particular, we built a custom editor (a ground-up replacement for Jupyter and VSCode) for agents to (a) work in notebooks and (b) coordinate with each other. You can fire off a…

Ashby is an all-in-one recruiting platform hiring Senior/Staff+ Product, Platform, and Design Engineers and hands-on Engineering Managers. Team growth from ~30 to 60 last year with plans to double in 2026. Roles are remote across Americas and EMEA. …

Hi HN. I am an Engineering Manager at Nectar Social, and we're hiring across product, design and engineering. The traditional playbook of buying ads on social media platforms no longer works for most brands. Buyers make purchasing decisions from org…

We're building infrastructure that makes the web queryable for AI agents. Already in production with major AI labs. Looking for experienced full-stack devs who are comfortable wielding agent swarms to ship fast. Small team, well-funded, high intensi…

Prequel enables software companies to sync data to their customers' data environments at massive scale. The small engineering team (four engineers) is based in NYC, the company is cash-flow positive and growing. The role involves solving problems ar…

We’re building the AI-powered infrastructure layer for small-business lending. Banks and fintechs use Omni to automate document collection, financial modeling, public-record research, and ongoing borrower communication. You’ll work on: 1) Wrangling …

Ever wanted to build indie video games at a startup? Let's talk. Elsewhere is a San Francisco-based company building a new kind of multiplayer social video game, inspired by indie roguelike deckbuilding games like Slay the Spire and CCGs like Magic:…

Apex Dental Partners is a dental support organization running 59 practices across TX/OK/CO/MO/IA/NE/TN/AZ. They are hiring a Full-Stack Developer to join a small engineering team with end-to-end ownership of problems — from diagnosing billing workfl…

Halfpricesoft is a profitable, bootstrapped company serving small business payroll and tax compliance for 20 years. The Founding Engineer will report to the Founder, own the technical roadmap, lead the transition from legacy systems to a modern clou…

BoWatt builds intelligent software for manufacturing complex hardware products — think machines, medical devices, or electronics. We’re a profitable, bootstrapped startup headquartered in Munich, with team members across Germany and the UK. We’re lo…

Chestnut builds systems for insurance carriers to run their distribution businesses, replacing spreadsheets and legacy systems with real-time data, deterministic workflows, and AI-assisted tooling. This role is end-to-end product engineering: design…

Tetricus Labs is a health tech startup building Personily, a psychiatric care platform combining structured clinical measurement (PHQ-9, GAD-7, LPFS), passive sensing (sleep, steps, location), AI session transcription, and supervision tooling. Seeki…

Starbridge is building an AI platform that turns large-scale public and enterprise data into reliable sales insights. We are early, moving fast, and building from zero to one, so this role will have huge ownership and product impact. Product Enginee…

Rinse provides dry cleaning and laundry delivery services to customers in twelve metropolitan areas in the US and Canada. The company has sophisticated logistics optimization software, a polished consumer product, and firm business fundamentals. Eng…

Mental health 501(c)(3) nonprofit building a care navigation platform. AI-native team using LLM-powered data enrichment workflows and agent coding teams. Role owns significant architecture and ships across full stack: NestJS backend, Next.js fronten…

Dynasty helps startup founders legally eliminate millions in capital gains taxes through QSBS trust planning. Today, sophisticated tax strategies are locked behind elite law firms and opaque processes. We’re building the software layer that makes ad…

Modern hardware supply chains run on spreadsheets, email, and PDFs. Silkline is building an AI-first procurement platform for aerospace, defense, and nuclear manufacturing. Customers include Machina Labs, Astranis, K2 Space, Castelion, Antares, and …

Oboe's goal is simple: teach one billion people one trillion things. We'll do that by building the world's first completely generalized AI-powered learning platform. Today, so much of our focus is spent on making machines smarter. We believe it's ti…

Lantern is building AI-powered revenue intelligence and is hiring multiple software engineering roles. Senior Software Engineer: own complex technical problems end-to-end, design scalable architecture, optimize AI model efficiency through prompt eng…

We make software landscapes understandable and explorable. Our canvas is zoom-to-code, and shows data on overlays from all of the git repos in your company. LLMs go through the codebase and extract the architecture. We provide clarity when it's most…

We're building a unified platform for credit and financial data to power financial inclusion globally. Our mission is to unlock economic opportunities for consumers historically excluded from traditional credit systems by transforming diverse data i…

River is a Bitcoin-only financial institution building a consumer financial app to save in bitcoin and spend in dollars. The company custodizes over 25,000 BTC, serves individuals and businesses across the U.S., is profitable, and publishes cryptogr…

Layer Health (founded 2023) is an ML-powered healthcare startup building a platform to synthesize patient medical records and accelerate clinical registry abstraction. Headcount ~38 and growing. Locations: Boston (Boston Common) or New York City (do…

4-person non-profit building OpenCouncil, an AI platform that makes Greek municipal council meetings accessible: searchable per-topic video clips, notifications, and speaker analytics. Live with 10 municipalities including Athens; open source. Stack…

We make robots that autonomously construct buildings. We are developing and manufacturing an autonomous bricklaying system in central Amsterdam and operating robots on construction sites across the Netherlands. Looking for experienced software engin…

BillionToOne builds molecular diagnostics detecting disease at the single-molecule level (prenatal and oncology). Over 1M tests processed; revenue growth to ~$300M and guiding $415-430M for 2026; publicly traded and GAAP profitable. Hiring multiple …

JustPark is the premier partner offering both B2B solutions for destinations and B2C services for drivers, simplifying the entire parking experience for venues, councils and private driveways. They are looking for a Lead Full Stack Engineer to drive…

Marker Learning is building an AI-enhanced assessment platform to make identifying learning differences faster, cheaper, and more equitable, especially for multilingual students. This is a Series B company running a multi-million-dollar longitudinal…

Uncountable is a profitable SaaS company accelerating R&D for industrial scientists. Hiring product-driven Full-Stack Engineers to build the Uncountable Web Platform and LLM Applications Engineers to advance the data model through LLM-native UIs and…

Flux.ai builds a browser-based EDA with integrated AI hardware engineering tools and agentic capabilities. Hiring multiple senior engineering roles (Platform, Front End/Product, Software for agentic products, and DevOps) to develop and maintain user…

Were building Cursor for sales - an AI assistant doubling sales productivity by handling prospecting, CRM updates, meeting prep, and follow-ups. Backed by founders & operators @ Lovable, OpenAI, Neo4j, Creandum. Pre-seed. Shipping fast. What youll…

PrairieLearn is an open-source assessment platform used by universities across the US. Early-stage, profitable, bootstrapped company seeking a full-stack engineer to work across the stack with meaningful ownership. Tech stack includes Node.js/TypeSc…

At UbiOps (https://ubiops.com), we make a platform to deploy AI and other workloads on any infrastructure. Our software is deployed in a broad range of environments: on-premises hardware, public clouds and everything in between. We work for governme…

VC-backed, fully-remote creator marketplace connecting eCommerce brands with everyday social media users. Hiring multiple full-time remote roles including a Senior Full Stack JavaScript Developer (React, Node.js, Next.js, Azure), Product Designer an…

Vantheon is an applied AI research lab exploring how AI will disrupt investing across economic classes: Vantheon.ai. If you are obsessed with trading, crypto, defi, or something similar, this would be an exciting opportunity. Role is in-person in Au…

BetterDB is building the tooling ecosystem for Valkey (a high-performance Redis fork). Focus is on observability: historical persistence, pattern analysis, anomaly detection, and Prometheus export. They ship OSS self-hosted and are launching a cloud…

Early-stage engineering role as the third engineer at Lift AI, building software for the elevator industry. You'll migrate an acquired Firebase/Firestore field product to a Django/PostgreSQL backend (including offline sync replacement), define API c…

Cliniko is practice management software that handles appointment scheduling, storing treatment notes, managing invoices and payments, running video consultations, and more. The software is used globally by 100,000+ people every day. It’s a web appli…

Founding Growth Engineer role to build virality into the product and drive 100x user growth. True 0→1 founding role with massive ownership. Responsibilities/requirements include building virality loops, proven track record driving significant user g…

5-person dev agency building AI, Web3, and SaaS products for startups, NFL players, and enterprises. Role involves shipping pixel-perfect UIs from Figma designs, making architectural decisions, and delivering production code for real clients—greenfi…