Steel | Applied AI Engineer + Infrastructure Engineer | Toronto, ON | ONSITE | $160k-$240k USD base + equity

Steel is open-source browser infrastructure for AI agents and apps. We make it easy for developers to ship products that interact with the web - without spending 80% of their time on browser pools, proxies, CAPTCHAs, and session state. In 2025 we grew 50x: 6,000+ GitHub stars, dozens of paying customers, millions of sessions served monthly. Dedicated chromium runs on Firecracker VMs for sub-second cold starts.

Stack: TypeScript, React/Next.js, Node.js, AWS, Firecracker, Postgres, Redis. 4+ YOE for both roles.

--- Applied AI Engineer ---

Shape how AI agents interact with the web. Build open-source frameworks/demos on the Sessions API, run experiments on which models/prompts/harnesses actually work, build evals against real scenarios, and work with customers shipping agents to production. AI-native full-stack engineers with strong product sense.

--- Infrastructure Engineer ---

Design and operate the systems Steel runs on. Sample projects: VM snapshotting that restores full browser state in under a second, performance-tuning the Sessions API from kernel traces, orchestrating millions of sessions with sub-second cold starts. Distributed-systems experience, strong AWS/GCP and Linux/OS fundamentals. Rust is a plus.

Public referral bonus: $10,000 if your intro becomes a hire.

Apply: email careers@steel.dev with GitHub & resume, mention HN.

Brandfetch (https://brandfetch.com) | Senior Backend Engineer | Remote | Full-time

Brandfetch is the internet’s canonical source for logos and brand assets. Think GitHub for brand identity: a brand repo that auto-indexes public assets, lets brand owners “commit” changes once, then propagates them—instantly and immutably—through CDNs, plugins, and APIs used by companies like Google, Canva, Salesforce, and soon … everywhere.

Problems you'd work on:

- Nightly curation bot auto-fixing outdated assets across 52M+ repos

- Next-gen ingestion and partition-key schema to leap from millions to billions of assets

- MCP server that exposes structured brand data to any AI agent or LLM, letting them fetch brand context on demand

- Vector search: surface any logo with ≥90% similarity in <50ms

- Real-time metering that pings Stripe the instant a user tops their quota

Stack: Node.js, TypeScript, Python, AWS (Lambda, DynamoDB, CloudFront, S3, CloudFormation), Serverless.

You:

- 8+ years of experience in backend software development.

- Proficiency with AWS tools (Cloudformation, API Gateway, DynamoDB, Lambda, Cloudfront, S3, IAM, OpenSearch).

- Experience with building REST APIs.

- Ability to write well-documented, clean code.

- Experience with building DevOps pipelines using Serverless.

- Great communication skills (we work across multiple timezones and document everything).

- Experience with Machine Learning.

Competitive salary + equity in a profitable, growing company.

apply: career at brandfetch.io (no recruiter please).

*Labor Solutions (YC-style) | Senior Software Engineer | Remote (India) | Full-time*

We run a worker wellbeing and compliance platform used by global buyers and their supply chain sites across Asia. We're in the middle of a meaningful migration and platform buildout — you'd be joining at a point where architectural decisions matter and your fingerprints will be on the system for years.

*The work:* Our stack is Django + Python on the backend, dbt for data transformation, React/Next.js on web, and Expo/React Native for mobile. We run on AWS and Azure. Right now we're migrating legacy services while simultaneously shipping new features — so you'll need to be comfortable holding both in your head.

*What we're looking for:*

- Strong Python/Django chops — you've built and maintained production APIs, not just tutorials - Comfortable with React/Next.js; bonus if you've touched Expo or React Native - You understand what a data pipeline actually does (dbt experience a plus, but SQL fluency matters more) - Cloud experience on AWS or Azure — not ops, but enough to not be blocked - You care about code quality without being precious about it

*What this isn't:* This isn't a greenfield startup with infinite runway. It's a real product with real users, real technical debt, and a migration in progress. If that sounds like a problem, this role isn't for you. If that sounds like the most interesting kind of work, let's talk.

*Details:* - Fully remote, India-based - Senior Software Engineer title

Apply: abhishek dot baddi at laborsolutions dot tech | mention HN in the subject

Holepuch|Remote, Worldwide|Senior Node.js Software Engineer

At Holepunch, we are redefining the internet’s architecture. Our open-source P2P platform, Pear, enables developers to deploy applications directly from their machine to users, creating scalable, decentralized applications without traditional server infrastructure. We are seeking Node.js Software Engineers to join our 100% remote, globally distributed team. You’ll work on our P2P stack, which includes over 1500 public npm modules, and help expand our ecosystem.

Why Holepunch?

- Work on groundbreaking technology that prioritizes user autonomy and privacy. - Collaborate with a team of thinkers and innovators dedicated to reshaping the digital landscape. - Contribute to a future where technology serves humanity, not the other way around.

Apply now to join our mission:

https://holepunch.recruitee.com/o/p2p-nodejs-engineer?source...

https://holepunch.recruitee.com/o/senior-node-engineer?sourc...

BrightCore | Founding Engineer | Dublin, Ireland (Hybrid, 2 days/wk) | Full-time | €58–65k + 1.0–1.5% equity

We're a 3-cofounder gym/fitness SaaS , closing a pre-seed. Hiring our first engineer to own: - NestJS/Postgres backend (~70%) - Coral, our WhatsApp AI agent for member retention (~30%)

You'd be our first hire. Real ownership, real equity, no committees. Stack: NestJS, Prisma, Postgres, Next.js, Anthropic API, Meta WhatsApp Cloud API.

Looking for: 3–5 yrs backend, comfortable shipping solo, genuine curiosity about LLMs / retention modelling. ML hobbyist > ML PhD for this role.

Email: Frankie@brightcore.ie ... short note + GitHub or one thing you've shipped.

Dablam | BDR engineer | Remote or on-site in NYC or London, UK| full-time or part-time

Dablam is a reputation management company that works with top companies to shape their communication, product stories and their impact in the real world. We work with product companies, brands and campaigns for product launches.

We're looking to hire an senior developer specialized in BDR and top of the funnel outreach automation through etl pipelines, openclaw, AI agents, clay and pure software engineering. ML and data science are required as we seek to detect signal in very noisy datasets. We generate our own leads today. We seek to employ an engineer that can own the pipeline stability and the results it produces. This is an engineering role. Experience in lead-gen matters but it's not mandatory.

* 2-4 years experience in software development; * Typescript, javascript, python, bash, linux; * familiarity with AI agents, ML and scikit-learn;

Reach out to me directly with your CV and victor that works at dablam.co.uk.

Kanmon | Senior FullStack Engineer | Hybrid (San Mateo) or REMOTE Kanmon is built around B2B finance and it's one of the largest and most broken markets in the world. SMBs are 44% of US GDP and extend over $5 trillion in trade credit to each other every year yet modern financial infrastructure intermediates less than 10% of it. The rest still runs on PDFs, paper invoices, and underwriting cycles measured in months.

Kanmon is rebuilding that stack from scratch. We're the finance infrastructure that lets software platforms embed payments and working capital directly into the software their SMB customers already run their businesses on.

Kanmon has raised new capital to go a layer deeper and are building an AI cashflow and business credit copilot that helps businesses make smarter financial decisions in real time. It's a genuinely new category of product, and we're architecting it from zero.

We're hiring a senior full-stack engineer to own it. End-to-end ownership, direct line to founders, no PM handoffs.

Full stack TypeScript: React, Next.js, NestJS, PostgreSQL, GCP. Competitive comp | mags@kanmonhq.com

Fullstory | REMOTE (US), Atlanta USA, & Bogotá Colombia | https://www.fullstory.com/

Fullstory offers privacy-preserving session replay and analytics for websites and mobile apps. Our session replays are nothing short of magical, and the combination with our automatic analytics creates eye-opening insights.

Remote (US):

* Senior Manager, Security Engineering - $230~240k USD + up to 20% bonus - https://www.fullstory.com/careers/jobs/110896c1-25d8-4c96-82...

Atlanta, US (semi-onsite, requiring 1 day per week in office):

* Senior Software Engineer, Web Capture - $145~170k + up to 10% bonus - JavaScript/TypeScript, React, Go (golang) - https://www.fullstory.com/careers/jobs/3b8d231f-ae95-4f95-84...

* Senior Software Engineer, Data Pipeline - $160~180k USD + up to 10% bonus - Go (golang), Kubernetes (K8s), GCP - https://www.fullstory.com/careers/jobs/9debecd5-7af9-48e9-91...

* Senior Software Engineer, Data Infrastructure & AI - $160~170k USD + up to 10% bonus - Go microservices, MCP server, dbt models - https://www.fullstory.com/careers/jobs/20dd3185-3313-4ac3-b1...

* Senior AI Automation Engineer, Finance - $135~145k USD + up to 10% bonus - https://www.fullstory.com/careers/jobs/4480a6d5-231e-420c-a6...

* Sales Engineer - $90~140k USD - https://www.fullstory.com/careers/jobs/89a34b65-2470-4ae2-bd...

Bogotá, Colombia:

* Senior Software Engineer, Data Management - $80~89k USD + up to 10% bonus - https://www.fullstory.com/careers/jobs/38395836-21ca-4663-85...

We have additional roles for sales, consulting, accounting, and customer support open in Atlanta, London, Australia, and some Remote (US) options. See the full list at https://www.fullstory.com/careers?utm_source=092xpqyAkV

For US roles, you can expect regular raises & bonuses, equity, and benefits including: health insurance, 401k matching (Vanguard), annual learning stipend, unlimited PTO, parental leave, and more. I take about 4-5 weeks vacation a year, in addition to ~3 weeks worth of company holidays (federal holidays + the week of Christmas to New Years.)

Folks in other countries can also expect a strong benefits package, but I'm not as versed on the details.

Additionally, you get a 5-week sabbatical after 5 years of employment - I took mine about a year ago, and it was fantastic.

To apply, please submit your info on the website, and our recruiting team will get in touch with you. If you have questions, feel free to reply here or contact me directly. (I'm an engineer on the iOS team, but I'll do my best to answer questions.)

Location: Charleston, SC

Remote: Yes

Willing to relocate: Yes

Technologies: Ruby, Python, JavaScript (ES6), TypeScript, React, Node.js, PostgreSQL, MongoDB, OpenSearch/Elasticsearch, AWS (ECS, EC2, VPC, ALB, Secrets Manager), Docker, Terraform, OpenTelemetry, Jaeger, Prometheus

Resume/CV:https://drive.google.com/file/d/1aBYTxqlWIKmm59UT5ffK493tKR0...

LinkedIn: https://www.linkedin.com/in/zane-lee-14496a297/

Email: zanedev28@gmail.com

GitHub: https://github.com/Kcstills17

Co-creator of Retriever (https://runretriever.app/), an AWS-deployed observability platform that enables AI-powered trace analysis through distributed systems. Built a custom MCP server allowing developers to query trace data using natural language through LLMs like Claude, optimizing context consumption through intelligent data distillation from verbose OTLP structures.

Experienced with building full-stack applications. I am comfortable using AWS as a cloud environment and have experience with AI technologies such as RAG, MCP, and Vector embeddings.

AirOps | Engineering, GTM | SF · NYC · Montevideo

Search is being rewritten — buyers ask ChatGPT, Claude, and Perplexity, and the brands cited in those answers win. AirOps is the runtime marketing teams at Ramp, Chime, Carta, and Rippling use to earn those citations: orchestrated LLMs, RAG, JS/Python code steps, evals, human-in-the-loop.

Backed by Greylock, Unusual, Wing, Founder Collective.

jobs.ashbyhq.com/airops

Ashby | YC 19 | REMOTE | Hiring Product Engineers | Sr: $153k-$220k, Staff: $190k-$275k Ashby is the all-in-one recruiting platform powering hiring at the world’s most innovative companies. If you cmd+f “Ashby” you’ll see that we’re powering many of job postings in this thread!

* Grew our engineering team from 30 -> 60 last year with plans to double again in 2026.

* 80%+ of our engineering team is made up of Senior-Staff+ level Product Engineers. We give an unusual amount of ownership to our engineers to build features end-to-end. Many of our most loved features were build entirely by a single engineer!

* 100% remote asynchronous culture with an even distribution of engineers across North America and Europe

* Full transparency on engineering levels + comp: https://www.ashbyhq.com/blog/engineering/leveling-and-compen...

Stack: TypeScript (frontend & backend), React, GraphQL API, Node.js, Postgres, Redis.

Full list of open roles: https://www.ashbyhq.com/careers

Deepline | NYC (ONSITE) | Founding Full-stack Engineers and Forward Deployed Engineers | $160k–$220k + meaningful equity

User interfaces are dead. Knowledge workers will exclusively work through agent interfaces like Claude Code/Cowork. We've built the interface layer to enable that.

One API that unifies hundreds of data providers, workflows, and data infrastructure to agents like Claude Code. We shipped our mvp last month; hundreds of early adopters signed up and are using Deepline.

You'd build core platform: agent-facing abstractions, infrastructure, UI. TypeScript/Python/Next.js/Postgres. $3.3M raised from Lerer Hippeau + Looker founding team. Technical founding team from Uber, Lyft, Capchase, MIT, Waterloo.

https://code.deepline.com/careers

Location: US Northeast / Greater Boston Remote: Yes, Remote preferred Willing to relocate: For the right fit, NYC or Europe.

https://drive.google.com/file/d/1iRTOzJ6X3dVCkaiIBAsFfT_Ydcn...

Email: luchenbrendan@gmail.com

Known for refactoring ruthlessly, hunting root causes, and fighting for the users often while talking with my hands.

Technologies: Are listed on my resume and gravitate around fullstack. To get past bad filters, I enumerate JavaScript TypeScript React Next.js Node.js Python Tailwind Linux Java Kotlin Android React Native Docker Git PostgreSQL GenAI AgentAI and Supabase.

Seeking: Bonus points for work in Health, Education, or Environmental sectors. Full remote is ideal, but Hybrid 40% in the Boston metro is fair game, and if you are still reading, have a wonderful day and make a stranger smile.

Statement: Hire me for versatility as a polyglot agnostic builder of stuff, mentorship capacity to strengthen your whole team, bulletproof optimism in a fast-paced and uncertain world, a low-maintenance and well-behaved ego, and the occasional classy dad joke (no, I don't have kids).

MixRank (YC S11) | Software Engineers | 100% REMOTE (Global) | Full-Time MixRank processes petabytes of data every month from web crawling. We have hundreds of customers using our data products including Google, Amazon, Facebook, Intel, and Adobe, across industries including Finance, Recruiting, Sales, Marketing, and Security. We’re a fully-remote company with a global footprint in over 20 countries. We're growing, profitable, employee-owned, no dependence on outside funding. Applicants from all geographies and backgrounds are welcome. We are looking for passionate individuals for whom programming is not just a job but it’s something they love to do. We're obsessed with computers, programming, big data, databases, compilers, hardware, math, data science, and the internet. Does this sound like you? Please apply to join our team. Our code base is very friendly to new contributors. You'll have a fully-functional development environment within hours (fully automated) and be pushing commits on your first day. Deployments to production happen multiple times per day and finish in less than 2 minutes. Effectively all of our codebase is written in Python, Rust, SQL, Javascript/TypeScript, and Nix. The core technologies you'll need familiarity with to be productive are Python, PostgreSQL, Linux, and Git. We operate at a larger scale than typical startups. We operate two datacenters with high performance servers we've built that are capable of dealing with the volumes of data we process. We've implemented our own distributed file system. We do full-scale web crawls. We download and perform static analysis on the entire universe of Android APKs and iOS IPAs that are published. Unlike a typical startup where you'll spend half of your time in meetings, and the other half fixing bugs from Jira tickets— at MixRank you'll get to challenge yourself with difficult technical problems that will help you to grow as an individual.

We're hiring continuously for the positions below— they aren't singular positions that will close once filled. Our philosophy on hiring is that the candidate is more important than the position. For each new member of the team, we design a custom role and responsibilities that are specialized to their interests. Other companies will come up with a long list of specific requirements for a position with the expectation that you'll exactly replace someone from the team, or that you'll be the perfect tetris piece that satisfies the job requirements decided by a committee. MixRank is more pragmatic: we'll first get excited about having a unique individual on the team, then we'll figure out the best way to accommodate their specific talents.

-- Junior Software Engineer - Remote (Global), Full-Time

We're looking for remote junior engineers that have 0-3 years of professional experience in software, and 5+ years of curiosity exploring computers, programming, and technical hobby projects. This is an open-ended entry role with mentorship and diverse opportunities to work on all areas of our product: databases, distributed systems, infrastructure and tooling, data analysis, machine learning, frontend/backend web development, APIs, data mining, data modeling, and more. To stand out, please highlight what makes you unique: passion for computing, curiosity and side projects, work ethic, niche research, etc.

Ideally you've already graduated, but if you still have one or more years left of school, please feel free to apply anyway, and if you're the right fit for the team we'll figure out a way to accommodate your schedule. https://www.ycombinator.com/companies/mixrank/jobs/Fnwsojk-j... --

Software Engineer - Remote (Global), Full-Time

We're hiring generalist software engineers to work on web applications, data mining, machine learning/data science, data transformation/ETL, data modeling, database scaling, infrastructure, devops, and more. We'll cater the role to whatever subset of these areas match your interests.

Beneficial experience includes PostgreSQL, Python, Rust, Linux, TypeScript, Nix, frontend/backend web development, and data mining.

https://www.ycombinator.com/companies/mixrank/jobs/RXQspen-s...

--

I’m Kiran, Chief of Staff (CoS) at MixRank, a fully remote data startup building go-to-market intelligence. We’re US-incorporated but hire globally, and we’re bringing on new teammates to join a fast-moving team with real ownership and impact.

Location: Rawalpindi, Pakistan Remote: Yes Willing to relocate: No Technologies: React, TypeScript, Node.js, Express.js, PostgreSQL, MongoDB, Flutter, OpenCV, Tailwind CSS, Bootstrap Portfolio: https://fatima-usman-dev-aovrrer.gamma.site/ Email: fatimaausman8@gmail.com

Frontend/Full-Stack Engineer with 2 years experience building consumer-facing applications. Led a 4-person team to 2nd place at EXPO'24 (COMSATS) for an AI-powered fashion platform with computer vision. Delivered full-stack features for retail tech and data analytics projects. Seeking remote frontend or full-stack roles with growth opportunities.

Yidi's Consulting | Senior Full-Stack Engineer | REMOTE (LATAM/EU time zones welcome) | Contract-to-hire | $40/hr | yidisconsulting.com

We're a 4-person boutique consulting shop in Albany, NY building custom web apps for healthcare, legal, and education clients. Looking for a senior engineer to work alongside the founder on production systems for clients.

Stack: Go (Echo, ENT), PostgreSQL, AWS, Cloudflare, Clerk, Alpine.js, Tailwind, Vite, Terraform. We have a proprietary ~1M-line Platform Foundation that anchors most projects.

You: Shipped real Go in production (not "willing to learn"). Comfortable across the stack. Opinions about migrations, RBAC, and not-overengineering. English fluent enough to talk directly with clients.

Process: Paid trial task → 3-month contract → conversion to long-term contractor. No middlemen, no platform markup.

Apply: hiring@yidisconsulting.com with a Go project you're proud of and a brief note on how you'd approach a vertical-slice task touching ENT, an Echo handler, and an Alpine component.

Hello,

I hope you’re doing well.

I’m currently looking for a job and exploring new opportunities.

Full Stack Developer with 7+ years of experience (React.js, Next.js, Node.js, TypeScript, Laravel).

If there are any relevant openings, please consider my profile.

Please suggest where i can apply, not getting any opportunities

Deducta | Senior Frontend Product Engineer | London, UK | Hybrid (3 days/week in office) | £150k+ cash/equity

We’re a data intelligence platform for global enterprises. We are well funded, growing fast, and solving the most pressing data challenges for some of the largest and most recognizable companies in the world. The capabilities of SOTA LLMs enable us to this at an unprecedented scale and success rate. We’re looking for a Senior Product Engineer (Frontend) to shape what our product looks like and how it’s built. Specifically:

- Lead on the deployment of LLMs as an enhancement/substitute to traditional interfaces

- Own feature developments and fixes across the frontend from ideation to deployment

Stack: Vue.js, Tailwind, Tanstack

Contact: kimathi [at] deducta dot ai / Apply: https://apply.workable.com/deducta/j/8ADBB3795A/

Promptwatch | https://promptwatch.com | Amsterdam, Netherlands | HYBRID/ON-SITE | Full-time | https://promptwatch.com

====================

Promptwatch helps companies track and improve their visibility in AI search /ChatGPT, Google AI mode and any other AI app. (GEO).

We handle 1,500/events/second, run millions of prompts a day, analyze them for brand mentions, sentiment, competitive intelligence, and help companies create and optimize content. We have the largest GEO insights platform with billions of prompts, responses, clicks, and mentions.

Work: Own app layer, real-time APIs & queues; ship end-to-end features.

Stack: TypeScript, React 19/Next.js, Node, tRPC, Postgres, GCP, Nice to haves: ClickHouse, Elasticsearch.

You: 8–9 YOE, strong TS/React/Node.

Comp: €90k–€110k + equity.

Apply: https://promptwatch.com/careers/senior-full-stack-developer-... (mention “HN: Full-Stack Developer”).

Marker Learning - Founding Full Stack Engineer – Remote (USA) – 180-250k

I have dyslexia. I was one of the lucky ones. Diagnosed at eight, I got accommodations and support before things spiraled. Most kids aren't so lucky. The path from initial concern to diagnosis can take years and cost families upward of $5,000. For many, it never comes at all. In one study, 50% of prisoners were found to be dyslexic, with 80% functionally illiterate.

Behind every missed diagnosis is a kid who gets told they're lazy, when the reality is no one ever gave them the right test.

Marker Learning is building an AI-enhanced assessment platform that makes identifying learning differences faster, cheaper, and more equitable, especially for multilingual students who are routinely misidentified or overlooked. Imagine if every kid could be screened for learning differences as easily as they're screened for vision. That's what we're building.

This isn't a chatbot or a homework helper. We're a Series B company backed by Reach Capital, Andreessen Horowitz, and Primary, running a multi-million-dollar longitudinal study spanning K–12 and developing the psychometric engine behind it. We need engineers who are excited by that.

We're hiring a hands-on full-stack engineer (React, Node.js, TypeScript) to help build and scale the platform: adaptive testing infrastructure, AI-powered scoring scoring and data pipelines, and the systems that maintain clinical rigor at scale. High autonomy, lightweight process, fast-paced. 8–10+ years, ideally with 0-to-1 or early-stage experience. You'll work directly with psychometrics, product, and data science, and the engineering decisions you make now will define the platform for years.

Reach out directly with your gh, linkedin, and resume and why you want this position to lucie@markerlearning.com. Please specify your location, if you are interested in full time, contract or open to both. Make the subject "Founding Engineer Application (I am not a bot)".