Steel.dev | Founding Engineers (Infrastructure, Applied AI), Growth, GTM | Toronto, San Francisco | In-office

Steel is building open-source browser infrastructure for AI agents & apps. We make it easy for AI engineers to ship products that interact with the web using our Sessions API - An API that controls fleets of browser sessions in the cloud while we handle everything from scaling to antibot and more.

Our tech stack:

- Frontend: Vanilla React + TailwindCSS + Shadcn, built with Vite, deployed on Vercel

- Backend: Fastify, Node.js, Zod, NATs, Drizzle with Redis, PostgreSQL, and S3

- Infrastructure: Pulumi, Go, Firecracker VMs, Docker

- Languages: Mostly Typescript, Rust, Go

With over 6,000 GitHub stars, dozens of paying customers, and millions of sessions served, we grew our platform 50x in 2025 purely through word-of-mouth and our open-source community. Backed by world-class investors, we're building a small, talent-dense team that's shaping the future of how humans & agents interact with the internet.

Current roles (all roles include competitive comp + equity):

- Infrastructure Engineer: Design, optimize, and scale our browser VM infrastructure

- Applied AI Engineer: Build on agent frameworks, integrations, and real-world AI use cases

- Founding Growth Lead: Own the growth machine to turn insane organic traction into a category-defining brand

- Founding GTM Lead: Be our first sales hire, closing deals with AI startups transforming entire industries

To learn more & apply: https://jobs.ashbyhq.com/steel

P.S. If you're feeling spicy, try our optional hiring challenge and submit the flag with your application once you reach the final step → https://challenge.steel.dev

Coveo | Senior Fullstack Developer | Canada | Full-time | Hybrid/Remote

At Coveo, we build AI-powered systems that bring hyper-personalization to every enterprise experience — whether it's e-commerce, customer service, or internal workplace tools. Our platform unifies relevance across the stack, helping users find what they need, when they need it.

We're looking for a Senior Fullstack Developer to help us scale these experiences. You'll design and build high-scale systems behind search, recommendations, product discovery, and Generative AI — crafting clean APIs and responsive UIs that deliver fast, personalized experiences to millions of users.

Stack: Java, REST APIs, distributed systems, React, TypeScript, responsive web apps, AWS, Kubernetes

You'd be a great fit if you have:

- 5+ years of software development experience

- A strong track record in high-scale backend development

- Experience with cloud infrastructure

- Solid front-end skills

- Strong communication skills and a collaborative mindset

We offer competitive salaries, top-tier equipment, great offices, and a team that genuinely values your input.

Interview Process: phone screen, interview with hiring manager, tech test, offer

Apply here: https://grnh.se/dxy6bbtr2us

Wolf Games — Director of Engineering, Creative Automation — Remote (US/Canada) — Contract

Wolf Games is building generative entertainment universes where AI and players collaborate in real time. We’re a Series A creative-tech studio scaling the systems that turn ideas into playable, live experiences.

We’re hiring a hands-on Director of Engineering to lead ~10 engineers building JavaScript-based web games, creative automation tooling, and a hybrid GCP + AWS platform. You’ll own architecture, reliability, CI/CD, and internal tools that connect AI-driven content pipelines to production games.

Stack: TypeScript, Node.js, React/Next.js, GCP/AWS, Kubernetes Looking for: strong technical leadership, web/game systems, automation mindset, AI familiarity Rate: $70–85/hr, contract-to-hire

Apply: https://news.ycombinator.com/item?id=46466074

Doubling | Junior Software Engineer (Contract, 1099) | NYC ONSITE | doubling.io

Doubling is partnering with an early-stage AI-driven fintech startup building a platform that converts real-time financial data and news into clear, actionable client communications.

We are actively hiring a junior full-stack engineer to help ship web, mobile, and AI-enabled features. You will work directly with the company’s CEO and CTO as one of the earliest engineering contributors.

Tech: TypeScript, React, Firebase Hours: ~20 hrs/week Location: NYC ONSITE (no remote) Authorization: US work authorization required, no visa sponsorship

Strong performance may lead to extended scope or future full-time consideration.

I am directly involved in hiring and will respond to applicants. Please apply here: https://www.doubling.io/careers/junior-software-engineer-fin...

Photon Health | Senior Software Engineers | Full-time | ONSITE / HYBRID | Brooklyn, NYC | [180 - 210K]

Photon gives patients ownership of prescriptions. Our platform enables clinicians to send prescriptions to patients via text, giving them the power to compare prices, choose their pharmacy, and save money. By putting transparency and choice into patients’ hands, we’re reshaping the way prescriptions work.

Join us if you're looking to make a real impact on an industry desperately in need of one. Fill out an application here https://jobs.gem.com/photon/am9icG9zdDpL4xgxKjrEK2H6aICx8Qye !

Stack: Typescript, React, Terraform, AWS, Kubernetes

Matcha.fm | Full-stack Software Engineer | $140K–$290K + Equity | REMOTE (US/Canada)

Hiring multiple Full-stack Software Engineers

We're building AI agent systems that automate complex multi-step workflows.

Ship production code fast, own projects end-to-end.

Looking for 5+ years experience (or <5 with hackathon wins/founder experience/strong GitHub).

Strong TypeScript/React/Node.js required. Stack: TypeScript, React, Node.js, GraphQL, PostgreSQL, AWS (ECS, RDS, Kafka, ES), Docker, Terraform. Full type safety, monorepo, 100% IaC, per-PR staging environments.

Remote US/Canada/EU

Apply: https://matcha.fm/apply/se

Legion Health (YC S21) | Founding Engineer (AI-Native Ops Infra) | San Francisco | ONSITE | VISA SPONSORSHIP | $130k–$190k + Equity

Legion Health is building the AI-native operations layer for mental health care. We run our own psychiatric practice and use AI agents to handle the complex "backend" of healthcare—scheduling, intake, documentation, billing, and risk detection. We have $3M+ ARR, $7M+ raised, and our infrastructure currently supports 2,000+ patients with only one human support lead.

We're hiring a Founding Engineer to own our backend and agent systems end-to-end. This is not a "wrapper" role; you will be architecting the state machines and event streams that turn clinical intent into reliable operations.

The Role:

Build AI Co-workers: Implement agents with tool use, memory, and safety rails that act as trustworthy teammates for clinicians.

Event-Driven Architecture: Design the schemas and workflows (Node.js/TypeScript/Postgres) that encode how psychiatric care operates.

High Impact: Your work lands in real clinical workflows immediately, directly improving patient access and care quality.

Tech Stack: Node.js, TypeScript, Supabase (Postgres), AWS (ECS/Lambda), Next.js 15, OpenAI/Anthropic.

Offer:

Comp: $130k–$190k base + significant early equity (0.2%–0.8%).

Location: San Francisco (In-person).

Process: Intro -> Systems Deep Dive -> Practical Work Trial (No Leetcode) -> Onsite. We move fast (7-10 days).

Email me at yash@legion.health if you have questions or if you're super cracked and I have to know about you.

Apply here: https://jobs.ashbyhq.com/legionhealth/ffdd2b52-eb21-489e-b12...

Journalytic | UI Developer (React/TypeScript) | REMOTE (US time zones) | Full-time

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 better decisions every day.

We’re a remote team with hubs in Pennsylvania, California, and Seattle. This role is perfect for an engineer who relishes complex technical challenges in a fast-paced startup environment. You’ll be joining a team of passionate A+ players who will support you and challenge you to grow. You won’t be a small cog in a big machine. Your work will have a direct impact on how the world’s best investors operate.

For full details and to apply, visit https://jobs.journalytic.com

alooola | REMOTE (US) | FULL-TIME | AI Product Engineer (React-Native + Node.js) | $100k–$140k

alooola is a wealth management mobile app for medical professionals (investing + retirement + spending), backed by a 30-year advisory firm with ~$1B AUM. Our app is in production and we’re expanding features now that a major custody/infrastructure upgrade is complete.

We’re hiring our second engineer to own features end-to-end across React Native/TypeScript (iOS/Android) and Node.js/Express/Postgres. AI tools (Claude/GPT) are part of the daily workflow, but we care most about strong fundamentals, validation, and UX polish.

Benefits: medical fully covered; 401k match after 1 year; flexible schedule; unlimited PTO

Apply: https://alooola.breezy.hr/p/0764568c8521-ai-product-engineer

Kinelo | kinelo.com | Full-Stack Engineer (AI + Backend) | San Francisco | Onsite

Kinelo manages the new type of hybrid team that will emerge in the future: humans+AI working shoulder-to-“shoulder”.

Our first product helps human software engineering teams deliver more efficiently and more reliably by assisting in coordination and engineering management. But it’s built on a foundational layer that ingests data, knowledge, and process across communications and systems, exposing that to humans and AI alike.

Eventually, Kinelo will become a proper human+AI orchestration layer, managing entire companies, and our goal is to have Kinelo run Kinelo (we already dogfood it today).

We’re looking for high ownership individuals to join our small team and shape its direction. We also just opened a new SF office and new hires will have the ability to help shape company culture, engineering practices, architecture, and roadmap.

We’re well-funded (just raised another round), founded by a serial founder, anti-bureaucratic, and highly technical.

We’re looking for:

- Those who want to go 0 to 1 with high ownership: moving features and products from idea on a napkin, to prototype, to engineering UI, to shipped and polished product

- ~8 years professional experience, including the pre-LLM days with strong CS fundamentals

- A balance of wisdom from experience and optimism about the future

- Strong TypeScript and Postgres (or other RDBMS) experience at scale and with high reliability (SaaS apps, APIs, etc)

- Experience with a variety of technologies, including containerization, distributed systems, and at least one strongly typed programming language (Go, C++, Java, etc)

- Ideally experience with ML and AI systems (though expertise in ML, data science, etc is not needed for this role)

We can’t sponsor visas but relocation assistance to SF is possible.

Please apply here: https://job-boards.greenhouse.io/kinelo/jobs/4088659009 and also email jobs@kinelo.com, mentioning this post.

Valis Insights (VALIS) | Full-time | Software Engineer | remote-first hybrid Massachusetts (US) Hi, I'm Caleb (co-founder/CTO) from Valis Insights. We're a small climate-tech B2B SaaS/HaaS startup, based out of MA. We build material sampling, sorting analytics, and material monitoring web-based and hardware/computer-vision enabled solutions for metals recycling companies.

We're looking for a passionate SWE with some linux/networking/firmware experience to drive forward some greenfield product development and help scale & deliver existing hardware-enabled offerings. We've got some scale-integrated cameras deployed in the field which enables a web-app for analytics for material sampling. We've got a few units deployed at metal recycling facilities, and we're ramping up sales. We're also building a camera-over-conveyor-belt solution for process monitoring (greenfield dev/R&D).

Desired Competencies: linux, networking, basic electronics, firmware, cloud infra (AWS), web products, databases

Nice-to-Have Experience: edge-to-cloud CV system deployment/design, .NET ecosystem (C#, EF), networking (Wireguard, ssh), firmware dev/mgmt, observability (OpenTelemetry, Prometheus), IaC (Pulumi), stats/math/ML/signal-processing fundamentals, basic soldering, web products (TypeScript, React)

Role is remote-first hybrid. For some hardware/firmware/R&D, you'll need to be in-person in Worcester MA, but majority of role is remote. Infrequent travel to recycling facilities (continental US) for deployment/maintenance will be required.

Apply here - https://apply.workable.com/valis-insights-1/j/A937EAA712/ We read and review every application. Please mention "HN" in one of the written responses.

We're also hiring an ML/SWE intern for the Spring & Summer; apply here - https://apply.workable.com/valis-insights-1/j/98C0E1509B/

Contact: caleb.ralphs@valisinsights.com

Layer Health | https://www.layerhealth.com/ Our engineering team: https://www.linkedin.com/company/layerhealth/people/ Location: BOSTON (Boston Common) or NYC (downtown) - hybrid / NO REMOTE Headcount: ~35 Stack: React / Typescript / Python / GCP Series A, fresh funding: https://www.layerhealth.com/resources/layer-health-raises-se...

Our interview process (candidates love it): meeting w/ me > tech chat with cofounder > take home assignment (capped at 2-3hrs) > onsite interview > offer (no leet code, no algorithms or pressured oddball questions)

Open Roles: Fullstack Engineer (Senior) Python/React/Typescript * Forward Deploy Data Scientist (1-2 years xp) * Jr Data Engineer (1-2 years xp) * ML Engineer * ML Infrastructure * Data Infra Lead Engineer * Research Scientist (PhD req) * Security Engineer

We Offer: * competitive base salary + equity + great health/medical benefits * unlimited PTO * collaborative engineering-first culture

Layer Health was founded in 2023 by leading machine learning researchers from MIT and Harvard Medical School. We are building an AI layer that can accurately and scalably synthesize information from medical records, with the mission to reduce friction everywhere in healthcare. Our LLM-powered platform is solving chart review once and for all, across use cases. For health systems, our first product dramatically accelerates clinical registry abstraction in areas ranging from surgery and cardiology, to oncology. Our long term vision is for our AI layer to safely transform patient care and minimize unnecessary heartbreak. Layer Health’s diverse founding team brings expertise across machine learning, UI/UX, large language models, and medicine.

Email me at mike.hauschild@layerhealth.com for more info!

Kato | Senior Software Engineer | San Francisco, CA | ONSITE | Full-time

Kato is building a compliance-first AI servicing platform for the $24B lending market. While others treat regulatory guardrails as an afterthought, we’ve built a regulatory rules system with an AI decision engine on top. Our first product is a Voice AI agent currently handling loan servicing calls for major fintechs like Bilt Rewards and Parafin.

We are backed by Pear VC and angels from Brex, Bridge, and Square. You’ll be our second engineering hire, working directly with our CTO (ex-Google/Brex EM) and CEO (ex-Goldman/Brex).

The Role: As an early hire, you’ll own mission-critical projects across the entire stack. You’ll lead the architecture of our real-time voice processing system, optimize LLM integrations for compliance-aware conversations, and build out our customer-facing dashboards.

Tech Stack:

Backend: Golang, PostgreSQL

Frontend: Next.js, TypeScript, React, Tailwind

Infra: AWS, Terraform, Kubernetes, Docker

AI/ML: LLMs, Speech-to-Text, Text-to-Speech

Requirements:

2-5 years of production software experience.

Strong API design and architectural thinking.

An "owner's mindset"—we are a small, high-intensity team where everyone drives product direction.

Experience with WebRTC, real-time audio, or FinTech is a plus but not required.

Location: San Francisco (4 days/week in-person).

To apply: https://jobs.ashbyhq.com/Pear-VC/214dc247-0778-485b-8a3d-067...

Hiring Tech Lead and SRE – REMOTE LATAM - We build AI tools that help high-volume law firms manage their caseloads more efficiently. Our first product—an AI assistant that transcribes and classifies inbound calls—is in production. We’re now expanding into case tracking, follow-ups, and full workflow automation.

Looking for:

Tech Lead: Lead a senior team, shape product and tech, work closely with founders.

Tech Stack: Python, TypeScript, Postgres, Kubernetes, GCP Languages: Spanish + English for leadership. English only OK for engineers.

SRE: DevOps & Infrastructure Engineer // CI/CD and Kubernetes

Apply here: tramcase.com

Gaia AI | Fullstack Platform Engineer | Robotic Perception Engineer | Full-Time | Boston

Hi, I’m Mel at Gaia AI (https://www.gaia-ai.eco/).

We’re a small GreenTech startup in Boston building hardware and software in the forestry space.

Role: Full stack / platform engineer working on the web app and mobile app. Our stack includes TypeScript, React, Mongo, AWS, and React-native.

Role: Robotic Perception / Computer Vision / Machine Learning engineer working on a sensor-packed backpack for foresters. Our stack includes LiDAR, Vision, SLAM, and Rust.

Preferred Years of Experience: >= 3

Company Size: 7 people

Company Location: Downtown Boston near South Station

For Fullstack apply here: https://docs.google.com/forms/d/e/1FAIpQLSeXplH__tMz_EIRS4yq...

For Perception apply here: https://forms.gle/t7uwLgo5UgadkzrAA

Feel free to reach out to me with questions: mel at gaia-ai.eco

Buildplace (by Form Follows You GmbH) | https://company.buildplace.io | Berlin

With Buildplace, you can simulate your planning projects in a digital twin in no time. The integrated inventory mapping captures the complexity of your real estate portfolio and transforms it into an interactive map that you can easily enrich with additional geodata. Furthermore, our holistic consulting approach supports you with individual project planning, customized enhancements, and the targeted application of Buildplace for your specific use case.

We are a team of ~10 persons half of them engineers. This might sound small, but we are bootstrapped and try to keep our software stack observable. We program mainly in Typescript with Fastify, BullMQ, GraphQL (Pothos) on the backend, Postgres and Redis as DBs [ and React, Maplibre, BabylonJS on the frontend ]. We see demand in more expertise for container orchestration, load balancing, reverse proxy configuration, VPS Administration and monitoring.

Therefore, if you are curious about our field of work and have knowledge in system administration and / or backend engineering with the stated technologies, feel free to reach out to us!

Contact: mail [at] formfollowsyou.com

Prophet Town LLC | Various Software Engineering Roles | US – Remote and Hybrid | English fluency required | Full-time | $150K-$250K annual total comp (multiple)

I’m the founder, trying to do “enlightened business.” We are a people-first, fully-remote, boutique indie tech agency – building a team of talented, high integrity, and community-minded individuals first, then building businesses around them. Our leadership staff are ex-Fortune 100; everybody touches code. Notable recent projects: internal tools for Anduril, and the auction system for voltagepark.com.

We’re currently especially seeking:

Full-Stack Software Engineers (React, NextJS, Ruby on Rails; Typescript, Python; Database Design, Devops, and third-party API integrations)

IoT Developers (Python, MQTT, GraphQL, AWS, Test Infrastructure)

Please apply using this Google Form: https://forms.gle/Dxpj7eTwcHpjiGT39. Applicants who submit before January 15 will typically receive a reply by January 31. Tier3 roles are typically 5-10 y/o/e with $150-$175k annual total comp. Tier4 roles are 11-20 y/o/e, $210-$250k annual total comp. Higher tiers exist, and we welcome exceptional applications.

REGARDING DECEMBER - if you already submitted to last December's post, and haven't heard from us yet, we're still getting to you. The team's been working really hard over the last year, and I unexpectedly gave most of the folks helping me with job submissions the time off at the end of December / beginning of January. Apologies for the delay, and we will be with you soon. Rest assured there are jobs we're trying to fill - in fact, more than ever, it seems.

Tasklet | Staff Software Engineer - AI Agents | San Francisco, CA | ONSITE | $260k-$330k + 0.8-1.6% equity

At Tasklet (https://tasklet.ai/), we're building the world's most powerful AI agent platform for business automation.

We're looking for a staff-level software engineer to share technical leadership of our core agent infrastructure. You'll architect systems for multi-step agent orchestration, state management, trigger systems, and seamless integration with thousands of APIs.

Our stack: TypeScript, React, GCP, Kubernetes, Claude

Looking for: 5+ years experience building production-scale systems, proven technical leadership, experience building AI agents, exceptional programming skills across the full stack.

Compensation: $260k-$330k salary + 0.8-1.6% equity, competitive benefits including medical, dental, vision, 401k, 4 weeks PTO

Apply: https://shortwave.notion.site/Open-Positions-at-Tasklet-2a36...

PowerSync | Senior Backend Engineer and Database Expert | Full-time | Remote (opt-in regional offices)

PowerSync is a sync engine that keeps your backend database in sync with on-device SQLite. We support Postgres, MySQL, MongoDB and SQL Server as source databases and have a plethora of client SDKS, many of which are integrated with popular libraries and frameworks on the client-side like TanStack DB, Drizzle, GRDB, Room, etc

If you're a database enthusiast and have a solid track record of building, deploying and maintaining backend systems on modern cloud stacks at scale, please check us out.

Detail: https://www.powersync.com/careers/senior-backend-engineer-an...

Our team is small and polyglot, but experience with TypeScript is a must.

Experience with OSS projects is also a must - either you've made significant contributions to popular devtool projects or, better yet, you have your own.

Culture: We're agile and devops purists (before those terms got coopted)

Aircraft Owners and Pilots Association | Engineering Leader

Location: Frederick, MD or REMOTE (US), ET timezone

AOPA is a nonprofit that supports and advocates for general aviation pilots through safety programs, training, advocacy, and digital platforms used by hundreds of thousands of members.

I am part of AOPA’s leadership and am actively preparing to fill this role, with a formal job req planned for early 2026. I will personally respond to candidates.

You would lead a team of 6–10 engineers and various consultants working on AOPA’s core digital platforms.

Stack: TypeScript, Swift, iOS, Astro, Cloudflare Workers, .NET, Azure

Looking for: former senior engineer turned engineering leader, strong people leadership with solid technical judgment, clear communicator aligned with business outcomes.

If you love general aviation and supporting the GA community, this role is a strong fit. Perks include free flight training.

Email alex.polvi@aopa.org if interested. I am a former YC founder (Cloudkick W09, CoreOS S13), active pilot.