Causal AI at scale for Fortune 500. We melted GPUs building this—now running one of the world's fastest private supercomputers. The only non-Fortune 500 company in the world to operate such a system. Customers: Nvidia, Delta, Mars. $145M Series B.
Hiring now: SREs for supercomputer infrastructure, C++ engineers for AI systems, data engineers for enterprise-scale pipelines, backend Python engineers for our platform.
Story: https://venturebeat.com/ai/alembic-melted-gpus-chasing-causa...
Job Board: https://jobs.ashbyhq.com/alembic?utm_source=LrrO1q3Bmk
We're building the platform primitives that power https://copilot.com (Microsoft's ChatGPT). If you've shipped systems at scale—whether backend services, distributed infrastructure, ML platforms, or consumer AI products—we want to talk to you.
The work: design and build secure, performant platform services for AI at scale; collaborate with infrastructure, product, design, and research teams; ship high-quality code that reaches hundreds of millions of users; move fast in a design-driven environment.
You: solid fundamentals in systems thinking and software engineering; fluent in Python, C#, C++, Java, JavaScript, or similar; shipped real products or systems people use; can communicate across technical and non-technical teams.
Compensation: Competitive with other frontier AI companies, commensurate with experience
We're actively hiring and will respond to applicants. Check https://microsoft.ai/careers for current openings, or email maiplatformjobs@microsoft.com if something specific doesn't fit the bill. Apply directly if genuinely interested in building the future of AI.
Rad AI builds AI products used by thousands of radiologists, helping reduce burnout and catch more disease across a large share of US medical imaging. We’ve raised $140M+ and are expanding our San Francisco presence with a new office at 2nd + Market, and we’re especially looking for infrastructure engineers who want to work in-person in SF.
Work areas: Infra / Platform: AWS, Kubernetes, Terraform, PostgreSQL, observability, secure/HIPAA production infra
ML infra / MLOps: Python, PyTorch, Airflow/LangGraph, data/feature pipelines, model serving
More about current roles and to apply: https://www.radai.com/careers?utm_source=W29wy29rlJ
Company
Zefr is the leading global technology company enabling responsible marketing in walled garden social environments. Zefr’s solutions empower brands to manage their content adjacency on scaled platforms such as YouTube, Meta, TikTok, and Snap. Through its patented AI technology, Zefr offers brands and agencies more accurate and transparent solutions for social walled gardens.
Role
Staff or Principal Site Reliability Engineer
You
As a Site Reliability Engineer at Zefr, you’ll apply your expertise in cloud infrastructure, CI/CD, Observability, and core SRE concepts, to deliver high-quality, reliable, and scalable solutions.
We’re looking for someone to combine their technical expertise with strong leadership and a passion for continuous improvement and innovation. Zefr wants a candidate that champions reliability as a product feature, and can translate complex technical concepts into strategy. This is a role where you'll shape how we build and operate systems at scale.
Tech Stack
Clouds - GCP, AWS
Kubernetes - GKE, EKS
GitOps - ArgoCD, Github Actions
Languages - Python/React/Node.js
Observability - Prometheus, Grafana, Open Telemetry, Chronosphere
Staff: <https://zefr.com/about-us/careers?ashby_jid=bcfa5b44-6623-4e...>
Principal: <https://zefr.com/about-us/careers?ashby_jid=54ecc7d8-6c8b-46...>
We're working on Skyway, a new kind of enterprise-grade finops tool born out of the Duckbill Group's consulting business. We're staying small (team-wise) but focusing on the largest of the SaaS spenders and their problems exclusively. We ship daily and have several unfair advantages.
1. Senior Front-end Engineer (TS/JS/React + bit of Python back-end)
2. Senior Back-end Engineer (Python + bit of front-end)
3. Senior Data Engineer (Python, airflow, duckdb, s3, bigquery)
More details are on our careers page (apply through this): https://www.duckbillhq.com/careers/
We're the truth-seeking AI (Grok) that accelerates human scientific discovery and deepens our collective grasp of reality.
We're looking for the very best technical talent globally (in-office) - Palo Alto or SF / Seattle / Memphis / NYC / London / Dublin / Tokyo / Dubai / Singapore
292 jobs are currently open - https://job-boards.greenhouse.io/xai
Software Engineers - We're flexible, but think Rust / C++ / Python / Typescript / React
Infra/SRE - k8s / Terraform / ArgoCD / Go
Grok Engineers - machine learning fundamentals, including model evaluation, training and fine-tuning / Python / Typescript
If you're an Engineer and not sure what the best fit is, try applying for one of our 'Exceptional' roles and we'll assess where we think you'll fit: London - https://job-boards.greenhouse.io/xai/jobs/4956070007 Palo Alto - https://job-boards.greenhouse.io/xai/jobs/4956028007
Last step - if you want some assistance, email me at mspiers@x.ai - Include 'hackernews' in subject line and please attach your CV.
We have three open roles:
- Engineer - Hybrid SFO I'm looking for an junior-to-senior software engineer to work with me (CTO) directly. Our systems process millions of pages of documents a month for the mortgage industry. We work with some of the largest lenders in the country and are at the forefront of applying LLMs and other multi-modal models in this industry.
New-grad and junior engineers particularly encouraged to apply. Looking for people who are motivated to write good code with a good mix of practicality and aesthetics.
- SRE - US Remote (SFO or Seattle preferred) - This is a broad role on the platform team including AWS infra w/terraform, software engineering, and IT
- Analytics Engineer - US Remote (SFO or Seattle preferred) - Another broad role that includes managing the data warehouse, building durable and ad-hoc reports in sql and python, and doing deep analysis.
All Jobs: https://jobs.ashbyhq.com/homevision
Hotel procurement's a $400B industry still running on spreadsheets and phone calls (and faxes!). We're bringing world-class AI search, web automations, and payment infra to this massive space. Folio is a first-of-its-kind marketplace connecting hotels + restaurants with their hundreds of suppliers using our AI-driven concierge-buying, invoice processing, and agentic payments.
Open Roles:
Our 16-person team hails from Plaid, Square, Persona, Slack, and Cruise. We're fully-remote with a hub in San Francisco, NYC, and Durham, and we meet up quarterly at one of our 300+ hotel partners.
- Software Engineer, Product (Full Stack) • Build the marketplace and payments experience that hotel buyers and suppliers love: https://folio.co/jobs/software-engineer-fullstack
- Software Engineer, Backend • Scale our marketplace infrastructure, search, and payment systems: https://folio.co/jobs/software-engineer-backend
Tech Stack: Rails, React, TypeScript, PostgreSQL, AWS, Elasticsearch, DBT, Snowflake
We're at your service: https://folio.co/careers
We’re building the future of voice AI for businesses, with a platform designed to make real-time agents easy to build, tune, and operate.
We’re looking for a senior backend engineer to work on core systems that drive live voice conversations in production. This is a hands-on role with a lot of ownership and a lot of Python.
What you’ll do
• Build Python-based state systems for real-time voice AI conversations
• Integrate multiple LLM providers (prompting, routing, tool calling, fallbacks)
• Write high-performance async Python (FastAPI, asyncio)
• Design and test resilient agent logic and microservices
• Operate and improve production systems with strong observability
What we’re looking for • 5+ years of Python experience, including async web services
• Experience with FastAPI, testing, and CI/CD
• Strong system design and security fundamentals
• Familiarity with LLMs, cloud infrastructure, AWS, and Kubernetes
Stack
Python, FastAPI, async microservices, AWS/GCP, Kubernetes, Redis, Firebase, Supabase, Datadog, SIP/voice APIs
Why Phonely
Small, intense team of builders. High ownership, fast pace, real impact. In-office 5 days/week in SF. Company-paid meals, great culture and periodic international work trips.
https://www.ycombinator.com/companies/phonely/jobs/gp1xSAu-s...
Artificial Analysis is an independent AI benchmarking and insights provider. We benchmark AI to help engineers and companies understand AI and make informed decisions regarding which AI technologies to use. We are fast growing with a team of 25+ and have backing from investors including Nat Friedman, Daniel Gross & Andrew Ng. Our benchmarks are cited by NVIDIA, Meta, Amazon, and publications including the Wall Street Journal and TechCrunch.
We are hiring across several roles:
Member of Technical Staff: Lead projects in AI benchmarking and analysis. Design and execute evaluations of AI systems, develop new methodologies and datasets, and drive strategic analysis that helps enterprises shape their AI strategy. Technical generalist role with exposure to cutting-edge AI. Consulting and data science backgrounds preferred.
Senior AI / ML Engineer: Lead development of our core benchmarking stack, focusing on data-intensive backend systems and APIs. Design Python solutions for benchmarking, model evaluation, and data analysis. Build visualizations that distill complex AI data into intuitive experiences. 3+ years experience required, project management skills highly valued.
Full Stack Engineer: Build and maintain our benchmarking platform and communicate insights to users. Proficiency in TypeScript & Python required. Familiarity with LLM APIs preferred. Tech stack: JavaScript/TypeScript, Node.js, React/Next.js, Python.
Product Manager (AI Speech): Drive product strategy and execution for our speech evaluation platforms, including text-to-speech, speech-to-text, voice cloning, and real-time voice. Hands-on, technical role working closely with engineering and analysis teams.
Technical Marketing Manager: Own our live programs (webinars, events, conferences) and email marketing. Build and execute on our events calendar, coordinate speaker prep, and engage our 300K+ monthly audience. 3+ years B2B tech marketing experience required.
Solutions Engineer - Language Models: Run our evaluation stack for new model evaluations, debug and interpret results, and work directly with clients to share insights and answer questions. Exposure to cutting-edge AI and world-class evals.
Solutions Engineer - Image/Video: Run evaluations for image and video generation models, debug and interpret results, and support clients with benchmarking insights for media generation AI.
Apply at hiring (-at-) artificialanalysis.ai with your resume, GitHub, and bullet points on relevant experience (including anything you've built). Add | HackerNews to email subject line.
Requirements:
2+ Years of Working in Tech Experience | Good Communication Skills | Bachelors or Equivalent Degree
2. Infrastructure Engineer :
Requirements:
3+ Years of Experience as Infra Engineer | Stack - Python, Go, Kubernetes, GCP/AWS/Azure , Cloudflare
3. Project Lead (UI/UX) :
3 + Years of Project Development Experience | Good understanding of market requirements | A/B Testing | Engineer or similar degree
4. Customer Support Executives [English OR Hindi]
2 Years of Customer Support Experience | Speaking Skills | Ability to follow tasks at hand
5. Marketing Posts (3 Positions)
Experience with Marketing and Advertisement | Out-of-the-box Thinking Ability | Led or Organised Events
Note: Keep the position you're applying for in the title.
Apply via Mail : careers@doshare.me
We're building the next generation of financial tooling to help small business owners succeed. Our solution blends banking, bookkeeping, taxes and payments into an all-in-one solution to help save our users time, stress and money -- so they can focus on what matters to them; running their business.
https://found.com/careers , or you can reach me directly via jarred@
SWE Tech stack: Ruby on Rails (Kubernetes, GKE), React/Typescript, Capacitor, MySQL, Spanner
Rinse provides dry cleaning and laundry delivery services to customers in twelve metropolitan areas in the US and Canada. We have sophisticated logistics optimization software, a polished consumer product, and firm business fundamentals. We're now over a decade old - this is a stable, yet consistently growing and innovating, company.
Our engineering team is distributed across the United States and internationally, and has been entirely remote for years now, but a desk can be provided in the above cities if you'd prefer.
We're open to both newly-graduated engineers or more senior engineers, provided they meet our bar. We're particularly interested in true full-stack engineers, with strong React / Typescript / CSS skills to complement comfort in a Python / Django environment. We're also seeking engineers with experience leveraging AI to automate complex operational processes.
You will join a high-caliber team where collaboration, honesty, and open communication are at the core of everything we do.
Search term bingo: Logistics, Django, Python, Optimization, React, React Native, Postgres, Mobile Engineer, Automation, Delivery, OR-tools, Forecasting
Lightning AI (the creators of PyTorch Lightning) is building the OS for AI. We provide a unified platform to build, train, and deploy models and applications without the infrastructure headache.
We are looking for Senior Engineers across Full-stack, Frontend, Backend, and ML/Inference Platform teams for our NYC and SF hubs. We operate with high autonomy—no hand-holding, just high-ownership engineering.
The Stack:
Languages: Go, Python, TypeScript, React.
Data/Infra: Postgres, Kubernetes (K8s), AWS, GCP.
The Profile:
Seniority: Significant experience scaling production systems and distributed architectures.
Execution: You thrive in a "0 to 1" environment and prefer biased-towards-action, deep technical work.
Impact: You’ll build the systems that allow developers to deploy AI applications at scale.
Please directly apply here: https://lightning.ai/careers
https://job-boards.greenhouse.io/lightningai?keyword=softwar...
Note: Must be willing to work at least 2 days in-office at our New York City or San Francisco locations.
Tech stack: Rust | ScyllaDB | k8s | Python | Postgres | Elasticsearch | Terraform
Role: Build and operate distributed database systems and data platform services that store all of the data for Discord's 200M+ users.
We're solving interesting problems around performance, reliability, and scalability at one of the largest communication platforms. Looking for strong distributed systems experience, familiarity with databases like Cassandra/ScyllaDB/Postgres, and comfort working in Rust or similar systems languages.
Engineers can't keep up with their production environments: dozens of services, dashboards everywhere, alerts firing constantly. The information to diagnose most issues already exists, but finding it takes longer than fixing the problem. And the more AI-generated code ships, the more services get deployed by people who won't be around to debug them.
Cleric connects to your existing observability stack, autonomously investigates production incidents, and tells engineers what's wrong. We're well funded with years of runway, a small team of AI and infrastructure veterans in SF, growing quickly. Stack: Python, Go, LLMs, Kubernetes.
Some of the problems we work on:
There's no test suite in production. When the AI says "the root cause is X," how do you verify that? You can't A/B test diagnoses. Ground truth labels don't exist. We build evaluation systems that track resolution outcomes over weeks and correlate fixes with diagnoses to build statistical confidence.
When something breaks, everything looks broken. Database latency spikes, five services throw errors, CPU goes up, logs explode. When an agent sees 47 anomalies at once, it needs to figure out which one is the root cause and which are symptoms, across systems with feedback loops, hidden dependencies, and non-obvious temporal relationships.
A single investigation might need six hours of metrics across 50 services, 10GB of logs, 10,000 distributed traces, the last 30 deployments, and the relevant runbooks. LLMs have finite context windows. What's relevant isn't known until you investigate. Getting retrieval wrong means wrong conclusions or exploding costs.
We're hiring:
- Staff Software Engineer, AI: You build the core agent. Reasoning, evals, self-improving feedback loops. You debug agent behavior by tracing reasoning and tool choices to understand why the agent made a specific decision. You build the systems that make a non-deterministic agent reliable, and push it to handle increasingly complex incidents.
- Staff Software Engineer, Product: You define what an AI SRE should actually be. When AI handles the reasoning, how do engineers stay sharp for cases it can't handle? How do you build trust when someone needs to verify agent conclusions at 2AM? You answer these by embedding with customers during real incidents, running experiments, and making the technical calls to ship what works.
- Software Engineer, Backend: You build and scale the investigation platform alongside our senior engineers. Integrations with Datadog, PagerDuty, and dozens of observability tools. Agent reasoning pipelines. Runtime systems that handle real-time data streaming at scale. You'll ship customer-facing functionality across the stack.
- Founding Marketer: Software engineers are allergic to AI hype. Our users already love the product. The challenge is reaching the next thousand teams without setting off their BS detectors. You build the marketing function from scratch: programs, pipeline, infrastructure. You need a technical foundation and the ability to hold a 30-minute conversation with a platform engineering lead without getting lost.
- Staff Designer (Remote): The interfaces for AI agents don't exist yet. How do you make autonomous reasoning legible without overwhelming? You own design across brand, product, and marketing, defining the visual language for a new category.
Apply: https://jobs.ashbyhq.com/cleric | Email: willem-hn@cleric.ai
Willem, Co-founder & CTO
Chroma is the open-source search database for AI applications. It supports dense vector, sparse vector, regex, and full-text search. We support local, single-node, and cloud hosting.
We're a team of 14, all engineers today. We work in Rust, Python, Typescript, and Go.
We're hiring for these areas:
- Account executive (founding)
- Database storage engineer
- Distributed systems engineer
- Platform engineer
- Product engineer
- Product designer
Learn more and apply here: https://www.trychroma.com/careers
alias helps people sell their footwear and apparel. We're owned by GOAT Group which also owns GOAT, FlightClub, and Grailed. We did over 1B in GMV last year. IYKYK. We work to make seller's lives easier, help them accomplish their goals, and provide top-tier market insights.
We're looking for Backend Engineers who: - Have a bias towards action - Are incredibly curious with a drive to learn new technologies - Are data driven and can reason about large systems
Tech stack: Go microservices, DynamoDB, redis, some exposure to rails + postgres
Apply at https://job-boards.greenhouse.io/goatgroup/jobs/4623586005. Mention in the application that you saw our post on HN.
We’re a small team of creative builders (ex-OpenAI, Pinterest, startups) crafting consumer products that feel personal, magical, and deeply human. We build for ourselves first, with the belief that what delights us will resonate with millions more. We imagine a new golden age of consumer software - crafted with heart, emotion, and taste. Small, inspired teams building things that feel lovingly made, purposeful, and joyful to use. If that sounds like your happy place, you’ll fit right in.
We have several positions available. Please send us a note at careers@buildforever.com with a short intro and links to what you’ve built (systems, repos, tools, prototypes, side projects). We care more about your taste, technical creativity, and product intuition than resumes.
Backend Engineer - https://ambiguous-thunder-400.notion.site/Backend-Engineer-2...
ML/AI Engineer - https://ambiguous-thunder-400.notion.site/ML-AI-Engineer-2aa...
Product Engineer - https://ambiguous-thunder-400.notion.site/Product-Engineer-2...
Social Growth Lead - https://ambiguous-thunder-400.notion.site/Social-Growth-Lead...
Stack Backend: Python, FastAPI, TypeScript, Postgres/SQLModel, Redis, Cloud Run. Frontend: Swift, UIKit, React.
Regard is a New York City–based AI health-tech company building the next generation of clinical insights software. Our platform uses machine learning and large-scale data to help clinicians synthesize patient history, recommend diagnoses, and automate documentation. Series B funding.
I'm Justin, the CTO. We're looking for engineers able to leverage current and future AI technologies for product development and platform enhancement. Generative AI experience is required.
Stack: Python, ts, k8s, AWS, postgres Contact: Email me at justin.davis+hn2602@regard.com with your resume and link to a project you've built.
Developer Marketing Lead - Remote friendly | Senior DevRel Engineer - San Francisco| Technical Lead (CI & Test Data Platform) - San Francisco | Sr Platform Engineer - San Francisco
Trunk is an a16z funded (25M) Series A dev tools startup, redefining software development at scale. We've helped engineerings teams at: Google X, Zillow, and Brex to understand why their builds fail, which tests are flaky, and how to ship code faster without sacrificing reliability. AI has made writing code 10x faster, but shipping is still painfully slow. The bottleneck has shifted downstream - to merge conflicts, flaky tests, inconsistent code quality, and dozens of other frictions that drain productivity and morale. Engineering teams that can stay focused on designing, implementing, and delivering software will build magical, high-quality projects - and they'll be happier doing it. We're building a CI Reliability Platform that empowers teams to land code faster and develop happier!
Our products:
* Merge Queue: Ensure your PRs keep the builds you care about green at any scale. *Flaky Tests: Detect and eliminate Flaky Tests. Our tech stack:Frontend: Typescript, React, Next.js, AWS Backend: Typescript, Node, AWS Data pipelines: Dagster, Python, polars CI/CD: GitHub Actions
Unlimited PTO (and we all actually take PTO), competitive salary and equity packages! Please apply here: https://trunk.io/jobs.
We are Baseten, the team that powers mission-critical inference for the world’s most dynamic AI companies such as Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma and Writer. We’re growing quickly and recently raised our $300M Series E, backed by investors including BOND, IVP, Spark Capital, Greylock and Conviction.
By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge model into production.
Apply Here: https://jobs.ashbyhq.com/baseten?utm_source=gkzEP29VD4 or email Jason.dupree@baseten.co
We are hiring for multiple core roles:
1.AI Solutions Engineer/Forward Deployed Engineer: You will partner directly with customers to architect, build, and deploy high-scale production AI applications on Baseten’s platform. You’ll own the journey with customers from initial exploration to production deployment. To be clear, this is a technical engineering role with hands-on coding and software dev that also includes aspects of product management, technical customer success and pre-sales solutions engineering mixed in. We’re language agnostic but strong Python and ML experience is a big plus.
2. Forward Deployed SRE: You will serve as the primary post-sales technical owner for our most strategic customers, ensuring smooth deployment, performance, and reliability of ML workloads in production. The role blends hands-on debugging, infrastructure expertise, AI model performance, and executive level customer facing ownership. We’re looking for deep Kubernetes and container orchestration experience along with a polished communication and executive level presence.
The Offer:
Compensation: Very competitive, we’re looking for folks with a breadth of experience
Equity: This is an opportunity to participate in the ownership of a fast-growing AI Infrastructure platform
Location: We are based out of San Francisco with offices in New York. We are also open to remote employees for these roles.
Process: If you’re interested, please apply here https://jobs.ashbyhq.com/baseten?utm_source=gkzEP29VD4 or email me direct at Jason.dupree@baseten.co
https://jobs.gem.com/piqenergy/am9icG9zdDp5j21vRWEpgIUq005H6...
Piq Energy builds software that helps renewable and large-load developers get projects connected to the electric grid faster. We automate grid interconnection studies and planning workflows.
You’ll own features end-to-end: interactive frontend, backend APIs, data pipelines, AI agents, and power systems simulation workflows. We’re looking for experienced generalists who like ownership, real-world impact, and scaling startups.
Stack: Typescript, Svelte, GraphQL, Mapbox, D3.js, Python, LLM agents, Postgres, workflow orchestration
I’m hiring for some (IMHO) really fun product manager roles on Cloudflare’s Developer Platform (workers.cloudflare.com) - Workers Runtime - Set vision for our V8 isolate based runtime that lets people deploy JS, TS, Rust and Python to the globe in seconds with great dev ex. - Containers - Help build our new containers platform into the best place for both agent Sandboxes and stateless global apps. - AI Agents - Define what Agents on Cloudflare look like: from our AgentsSDK, to Sandboxes, to MCP Servers, “Code Mode” (see our blog) and more.
We’re a really technical group, and tend to like product managers that can straddle the line between engineer and PM. You should be able to set high-level vision, understand architectural constraints, and be technical enough to really deeply understand our users (developers).
email: <my-hn-username>@cloudflare.com - Please add “HackerNews” to the subject line.