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

Link11 | QA Engineer | Remote (EU time zone) | Full-time | https://www.link11.com

As one of our QA Engineers, you'll be the guardian of product excellence - thinking like a hacker, testing like a detective, and ensuring our complex systems work flawlessly in the wild. You'll go beyond finding bugs to anticipating the unexpected: edge cases, weird component interactions, and those "no user would ever do this... but what if?" scenarios that separate good products from great ones.

What You'll Own:

* Design battle-tested strategies that catch issues before customers do

* Build automated test suites that scale with our ambitions

* Hunt down bugs across complex component interactions and configurations

* Partner with dev teams to ship quality at speed

* Be the voice of risk assessment when it matters most

You Should Have:

* Critical thinking that connects dots others miss

* Deep web tech knowledge (HTTP/HTTPS, DNS, SSL/TLS, CDN)

* Automation chops (Python, JavaScript, Bash)

* Experience with test methodologies and writing bulletproof test cases

* Debugging skills that turn logs into insights

* Communication skills that turn complex issues into clear actions

Why Join?

You'll be testing cybersecurity products that defend critical infrastructure against DDoS attacks – a single bug could mean the difference between stopping an attack in <10 seconds or watching a bank, power grid, or hospital go offline. This isn't just QA – it's cyber defense at the highest level.

If breaking unbreakable systems and ensuring bulletproof security for critical infrastructure sounds like your kind of challenge, come lead, code, and conquer with us: https://www.link11.com/en/jobs/qa-engineer-remote-first-f-m-...

Matcha.fm | Full-stack Software Engineer | High Equity | REMOTE (US/Canada/Europe) Hiring Full-stack Software Engineer

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

Needs experience in a startup building a product from 0 to scale.

Strong React/Node.js/PostgreSQL required.

Remote US/Canada/Europe

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

Stack Influence | Multiple Openings: Full Stack Developer, Technical Product Manager, Product Designer & UX Research | Full-time | Remote (Worldwide) We’re a VC-backed, fully-remote, fast-growing creator marketplace connecting eCommerce brands with everyday social media users.

• Senior Full Stack JavaScript Developer ($125-200k USD): Modern tech stack—React, Node.js, Next.js, and Azure. Individual contributor on a small team with no mentoring duties and a 4-day work week.

• Product Designer and UX Researcher($120-180k USD): Hybrid design and research role. 4-day work week

• Technical Product Manager ($150-225k USD): Business-minded ex-engineer with SQL, analytics, and integration skills. 4-day work week

APPLY –> https://stack-influence.breezy.hr/

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

Blackshark AI | Software Engineers & Platform Engineer | Full-time | Austria or Remote EU Hours | VISA sponsorship available

We build geospatial AI infrastructure. Our platform lets analysts train custom object and change detection models on satellite/aerial/drone imagery in minutes, then reconstructs 3D terrain from those detections. We just shipped a planetary-scale simulation platform with Lockheed Martin powered by Unreal Engine.

If you want to work on distributed systems that run in a data center one day and an edge laptop the next, we have interesting problems. Our training and inference infrastructure is processing trillions of pixels and we deliver real world impact for our customers across defense, intelligence, and local governments.

Tech Stack: Python, Fast API, PyTorch, Postgres, Redis, Vue.js

Infrastructure Stack: Kubernetes & Docker, Linux, AWS & Azure, Azure DevOps, Terraform, ELK, Prometheus & Grafana, ArgoCD & Helm

Roles:

Software Engineer - Data Plane Team: https://jobs.eu.lever.co/blackshark/6110fedd-5cd8-40e5-ac11-...

Software Engineer - Machine Learning Team: https://jobs.eu.lever.co/blackshark/7c4b0833-790b-4490-b24a-...

Platform Engineer - Deployment Team: https://jobs.eu.lever.co/blackshark/56a85834-d986-4105-9cc8-...

or reach out to HM at: 'eivanov@' + username[:-2] + '.' + username[-2:].lower()

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

Stack Influence | Multiple Openings: Full Stack Developer, Technical Product Manager, Product Designer & UX Research | Full-time | Remote (Worldwide) We’re a VC-backed, fully-remote, fast-growing creator marketplace connecting eCommerce brands with everyday social media users.

• Senior Full Stack JavaScript Developer ($125-200k USD): Modern tech stack—React, Node.js, Next.js, and Azure. Individual contributor on a small team with no mentoring duties and a 4-day work week.

• Product Designer and UX Researcher($120-180k USD): Hybrid design and research role. 4-day work week

• Technical Product Manager ($150-225k USD): Business-minded ex-engineer with SQL, analytics, and integration skills. 4-day work week

APPLY –> https://stack-influence.breezy.hr/

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...

Monadical.com | Senior Full-Stack Engineer | Full-Time Montreal | REMOTE (Canada-Quebec)

Monadical is a fully remote software consultancy. We’ve built a diverse, friendly team that gets exposed to diverse industries and learning opportunities through our 3-12+ month projects across multiple sectors. Check our portfolio to see what we mean.

We also maintain company principles that guide who we work with and how we maintain our culture. It’s a collaborative effort that any employee can edit through a pull request. We’re a relatively flat organization, fully-remote, and operate across many different toolsets and stacks depending on project needs. We’re a diverse team that shares similar values: self-direction, technical excellence, and curiosity. We do a lot of R&D and move quickly. That often means doing whatever it takes to answer a question and being quick to adapt to new information. Our iteration cycles are short.

We’re seeking:

- Senior Full-Stack developers strong at Python and/or JS, with experience in client relations, project management, a good understanding of machine learning systems, particularly LLMs, strong UI/UX design, and user research skills to help us build more thoughtful AI-powered products. Experience with ML models deployment and LLM application development is a plus.

See the full description and apply here: https://careers.monadical.com/

If you have any questions, drop us an email at apply at monadical dot com

Some perks of working with us include: • Work from home (we’re fully remote!) • Flexible working hours • Six weeks of paid vacation • Competitive salary • Autonomy •Flat organizational structure. Your ideas matter, regardless of your title

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

Stack Influence | Multiple Openings: Full Stack Developer, Technical Product Manager, Product Designer & UX Research | Full-time | Remote (Worldwide) We’re a VC-backed, fully-remote, fast-growing creator marketplace connecting eCommerce brands with everyday social media users.

• Senior Full Stack JavaScript Developer ($125-200k USD): Modern tech stack—React, Node.js, Next.js, and Azure. Individual contributor on a small team with no mentoring duties and a 4-day work week.

• Product Designer and UX Researcher($120-180k USD): Hybrid design and research role. 4-day work week

• Technical Product Manager ($150-225k USD): Business-minded ex-engineer with SQL, analytics, and integration skills. 4-day work week

APPLY –> https://stack-influence.breezy.hr/

I have adapted our "Stealth" pitch to fit their strict format while keeping the "Nerd Bait" hook. Stealth PropTech Startup | Boston, MA (or Remote) | Founding Full-Stack Engineer | CONTRACT TO HIRE | Competitive Market Rate + Equity We are looking for a "Mad Scientist" engineer to build a living, gamified dashboard that disrupts a massive legacy industry (Consumer Logistics/Real Estate). The Stack: React, Next.js, Supabase, Node.js. (Bonus: Framer Motion/GSAP). The Project: This isn't a CRUD app. It is a "Command Center" that feels like a video game. It features a dynamic "AI Companion" (Nook) that actively coaches users through complex financial and logistical phases. We need someone who can take a "Frankenstein" MVP concept and turn it into a high-performance, secure, living organism. About You: * You treat your IDE like a video game. * You obsess over micro-interactions and "game feel." * You want to be Employee #1 on a product that solves a universal anxiety point for 40k+ users in Boston alone. The Deal: * Mode: Contract-to-hire. We start with the MVP build (paid project). If you survive the mission, you become the Founding Engineer. * Culture: No Jira. No PMs. Just code and shipping. To Apply: Email me at jobroplus@gmail.com Do NOT send a resume. Send ONE link to the coolest/weirdest thing you have ever built. Show me code with a soul.

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...

GreenArrow Email | Remote | Full-Time https://www.greenarrowemail.com/careers/developer

I'm Alex McHale, Lead Developer at GreenArrow Email. We're looking to add an additional developer to our team. The right candidate will have solid Go skills and can "hit the ground running" (so sorry for the cliché). Bonus if you're a polyglot who might have skills in Ruby on Rails and JavaScript.

We've put a lot of thought into our job post. Please give it a read. If you think you're a fit, there's a link at the bottom of the post with a form to fill out.

Adalat AI | https://www.adalat.ai | Remote (India) | Go, React, Next.js, k8s

We're Hiring at Adalat AI: Join Us in Building the Future of Justice

Adalat AI is on a mission to transform India’s judicial system with cutting-edge AI — reimagining courtroom workflows from transcription to summarization, just as UPI transformed payments and Aadhaar revolutionized identity verification. Deployed across 10 states and recently launched at the Delhi High Court, our platform is backed by global foundations and built by a team with roots at Harvard, Oxford, MIT, and IIIT-Hyderabad.

Roles:

- 2 X Fullstack Engineer (5+ YOE) – Own end-to-end feature delivery across React/Next.js, Go services, with Postgres as your database: https://www.adalat.ai/careers/full-stack-engineer

- Full stack Lead Engineer (10+ YOE) - Own technical leadership, mentor engineers, set technical roadmap of several of our products: https://www.adalat.ai/careers/lead-engineer-full-stack

Why Adalat AI?

- Mission-driven: Your work has real-world impact—helping untangle India’s court backlog, improving access to justice for millions.

- Remote-first: Work from anywhere.

- Unlimited PTO: Yes, seriously.

- Unique environment: Co-design with judges, legal experts, and researchers. Publish, learn, grow. We value tech, law, and impact equally.

Stack Influence | Multiple Openings: Full Stack Developer, Technical Product Manager, Product Designer & UX Research | Full-time | Remote (Worldwide)

We’re a VC-backed, fully-remote, fast-growing creator marketplace connecting eCommerce brands with everyday social media users.

• Senior Full Stack JavaScript Developer ($125-200k USD): Modern tech stack—React, Node.js, Next.js, and Azure. Individual contributor on a small team with no mentoring duties and a 4-day work week.

• Product Designer and UX Researcher($120-180k USD): Hybrid design and research role. 4-day work week

• Technical Product Manager ($150-225k USD): Business-minded ex-engineer with SQL, analytics, and integration skills. 4-day work week

APPLY –> https://stack-influence.breezy.hr/

Prove AI | Principal Engineer's and Senior Engineer's | Remote but must be based in the US | Very attractive base salary + equity + benefits

Prove AI is an AI management platform that helps organizations centralize and manage their AI models while maintaining strict oversight of data access and usage. Built on distributed ledger technology, Prove AI provides tamper-proof oversight, ensuring organizations can set and enforce guardrails to mitigate risk and optimize AI performance.

Senior Engineer's - experienced, hands-on engineers who can take end-to-end ownership of complex full-stack systems—spanning TypeScript, React, Node.js, and generative AI integrations—and operate effectively in a fast-moving, early-stage environment.

Principal Engineer's - Lead the technical aspects of the engineering team, mentor engineers, set high standards in architecture and developer-experience, architecture and developer-experience standards, and influence senior leadership across all business functions with clear trade-off narratives and mechanisms that scale.

Candidates must have Full stack experience as well as AI/ML experience

Contact: Richard@proveai.com - you can review and apply for the Senior via this Link - https://proveai.careers.hibob.com/jobs/c2e0ebfc-0922-424b-88... and the Principal via this Link - https://proveai.careers.hibob.com/jobs/43158dce-e153-41f7-b6...

Natera | Staff SWE - EMR Platform | Austin, TX | Remote | $170-190K base + equity + bonus

THE MISSION:

Help providers and patients make life-changing medical decisions with accurate, timely genomic test results. Our EMR team builds the interoperability backbone that connects hundreds of healthcare organizations to Natera's testing platform.

THE CHALLENGE:

• Build next-generation EMR integration platform handling thousands of daily transactions

• Wrangle healthcare standards (HL7, FHIR, CDS) across 100+ organizations with varying implementations

• Create scalable workflows for test ordering, results delivery, and medical record exchange

• Transform legacy healthcare data into modern, structured formats

WHAT YOU'LL BUILD:

• Real-time message processing systems handling patient orders and lab results

• Integration adapters for major EMR systems (Epic, Cerner, etc.)

• APIs and workflows that ensure critical test results reach the right clinicians quickly

TECH STACK:

TypeScript, Node.js, Jest, Cypress, infrastructure-as-code

TEAM:

Small, high-impact team managing full-stack ownership

Healthcare/Epic experience helpful but not required - we'll teach you the domain.

The Electronic Medical Record (EMR) space has interesting technical challenges: creating flexible systems that handle both strict standards and real-world healthcare data chaos, all while maintaining HIPAA compliance and sub-second response times.

Contact: astruthers@natera.com or linkedin.com/in/code-lorde

Findigs | Full-time | NYC | 3x/week in office (M,T, Th) | findigs.com

At Findigs, we’re transforming the rental experience — making it fairer, stress-free, and more convenient by changing the fundamentals of renting.

We build high-scale applications that streamline renting for millions. Our modern tech stack includes Python, Typescript, Node.js, React, and scalable cloud infrastructure.

We foster a collaborative culture where engineers have high ownership and autonomy, taking features from concept to deployment.

Join our sharp, supportive, and mission-driven team in our newly renovated SoHo/NoHo office.

Open role: Senior Software Engineer —> Apply here (https://jobs.lever.co/findigs/3b39616d-223f-4326-a500-f804c3...)

Base Salary of $180k - $210k

Pre-IPO Equity

401k Matching up to 4%

Unlimited PTO

Lunch in office every day, home office setup stipend, monthly gym stipend