Recombine | Principal Software Engineer | Remote (UK/EU) | Full-time | https://recombine.ai |
Recombine builds advanced conversational AI agents for Europe's banks, fintechs and marketplace companies.
We're hiring a Senior Solution Engineer, a Principal Software Engineer and a Senior Infrastructure Engineer.
Tech we use: TypeScript, Node.js, Python, Terraform. We are cloud-agnostic.
We don’t sponsor visas at the moment.
See all of our opportunities here: https://recombine.ai/careers/
foam.ai | Full Stack Founding Engineer | SF (onsite) | Full Time
At foam we’re building the first telemetry and production system designed for LLMs, giving them complete visibility into and control over running software. Today we’re making money by fixing bugs as they happen, tomorrow we’re the data layer for all production observability tooling.
* We’re a six person team. Perla (CEO) was the 5th engineer in the consumer facing team at Affirm (pre-IPO). Shawn Krisman (CTO) was an early engineer at Yelp, Reddit, Patreon and architect at Affirm (pre-IPO).
* We've raised $8.4M in seed funding from Khosla Ventures, Max Levchin, The House Fund, and South Park Commons
* We’ve got active betas at Perplexity, Orb, Braintrust, Plaid & TogetherAI.
If being #7 is exciting; reach out: send an email to luke -at- foam dot ai with your resume and mention you came from HN
Sanity, New Venture | Senior Data Engineer/Applied Data Scientist/Senior Full Stack Engineer | SF Bay Area hybrid (2 days/week in the office) | Full Time
https://www.sanity.io/careers/senior-applied-scientist-ai-ml...
https://www.sanity.io/careers/senior-data-engineer-new-ventu...
https://www.sanity.io/careers/senior-full-stack-engineer-new...
We’re helping companies make their web content more accurate, current and understandable for AI assistants so customers/consumers can make better decisions.
Black Hills Information Security | Senior DevOps Engineer | REMOTE
Role focuses on developing and maintaining automation for penetration testing service infrastructure (C2, remote access, phishing, etc.).
Abnormal.AI | REMOTE in US, Canada and Singapore) with optional offices in SF & NYC. HYBRID in Bangalore, India | Full-time |
I'm looking for exceptional full-stack and backend engineers to join my teams at Abnormal AI to fight cybercrime. We have multiple open positions for each of these roles, working in Python, Golang, Typescript and React among other leading edge technologies. If you're looking for personal as well as company growth, you won't find a better company than Abnormal AI.
I'm the Director of Engineering for the Messaging Security Products Division. We build the user-facing products for inbound email security and have many interesting challenges working at massive scale. Please see the following links for more details on the open positions and our general careers page link for all open positions across the company. We are hiring for engineering in other divisions as well!
Engineering Manager Remote - Singapore: https://abnormal.ai/careers/jobs/7497288003?gh_jid=749728800...
Engineering Manager Hybrid - Bangalore: https://abnormal.ai/careers/jobs/7496072003?gh_jid=749607200...
Software Engineer II - Fullstack (4 open positions) Remote - USA/Canada: https://abnormal.ai/careers/jobs/6671235003?gh_jid=667123500...
Software Engineer II - Fullstack Hybrid - Bangalore: https://abnormal.ai/careers/jobs/6577843003?gh_jid=657784300...
Software Engineer II - Backend Hybrid - Bangalore: https://abnormal.ai/careers/jobs/6592675003?gh_jid=659267500...
Software Engineer 1 - Fullstack Remote Singapore: https://abnormal.ai/careers/jobs/7500482003?gh_jid=750048200...
Machine Learning Engineer II Remote - Singapore: https://abnormal.ai/careers/jobs/7509271003?gh_jid=750927100...
Lantern | NYC only, hybrid 4 days a week in office | Senior Software Engineer (mid career - Staff)
Lantern is Series A company, building the future of sales automation with AI agents that actually work. We're replacing the messy patchwork of enrichment tools, intent platforms, and automation software with a single system that does it all—pulling from 150+ data sources to research prospects, verify contacts, and help close deals.
We're a small, focused team tackling hard problems at the intersection of AI and enterprise data. You'll be working directly on the core product, helping us build intelligent systems that can reason about complex sales workflows and make autonomous decisions.
On any given day, you might:
- Build reliable agentic workflows that orchestrate multi-step research and outreach processes
- Design data pipelines that synthesize insights from hundreds of disparate sources into actionable intelligence
- Architect systems that scale gracefully as we handle increasingly complex prospect analysis and verification
- Collaborate directly with early customers to understand how our AI agents can solve their hardest go-to-market challenges
Tools we use:
- Python, LangGraph, BAML, Temporal.io, ClickHouse, Postgres, dlt - TypeScript, React - AWS, Modal.com, K8s, ArgoCD, GitHub Actions
This is a chance to work on genuinely novel problems in AI—not just fine-tuning LLMs, but building autonomous agents that can navigate messy real-world data and make smart decisions. If you're excited about pushing the boundaries of what AI agents can do in production, we'd love to talk.
apply using form, just answer a few questions
Marple | Antwerp, Belgium | Full-time | Hybrid on-site + WFH
We are building software for handling huge time series from R&D in Aerospace & Automotive. Engineers use Marple to analyse data from exciting stuff such as: space rovers, eVTOL aircraft, electrical hyper cars, …
We are looking for a technical mind with a love for customers to become our head of customer success.
Reach out to nero (at) marpledata (dot) com
Uncountable | NY, SF, London & Munich (In-Person) | Full-Stack Engineering
https://www.uncountable.com/hiring/hn
Uncountable accelerates R&D for industrial scientists across leading materials, chemicals, and life sciences organizations. With our SaaS solution, our customers get better products to the market in half the time. Uncountable was founded by MIT and Stanford engineers and has been profitable since 2016. Our team has grown from 50 to 100 over the last two years.
Full-Stack Engineers | $120k - $220k + Equity
---> Uncountable is looking for engineers who can spearhead the development of the Uncountable Web Platform. The position is heavily product-driven and comes with challenges across the stack.
--> Summer internships and working student positions are also available.
Learn more: https://www.uncountable.com/hiring/hn
Uncountable is hiring in New York City, San Francisco, London, and Munich.
Contact our CTO directly at jason@uncountable.com
Runable | Bangalore, India | On Site | Software Engineers | Full Time & Internship | runable.com
Runable is a general purpose AI agent for any task you can think of. You can create presentations, websites, docs, reports, videos, images, use over 3000+ services, control remote browsers, etc.
I’m looking for savvy people with potential to grow quickly who wants to work at a startup. If you want to take ownership, learn and be a founder in future. This is the place for you.
Shoot me an email with your github or portfolio: saksham@runable.com
Reffie | Multiple Roles | Toronto, Canada & Austin, Texas (ONSITE/HYBRID) | Full-time
Reffie is the next-generation workflow and data analytics platform for residential real estate owners, operators, and property managers. Antiquated software causes renting to be a painful experience for everyone involved. Our mission is to streamline rental communications and house families faster. https://reffie.me/
Our backers include some of the most well-respected early-stage VCs and investors, including Haystack, Redbud, and Trust.
Open roles:
* Full-stack Eng (all levels as long as you have the requisite exp): https://reffie.me/jobs/swe-fullstack-toronto
* Applied Machine Learning Eng (all levels as long as you have the requisite exp): https://reffie.me/jobs/swe-ml-toronto
* Growth Lead: https://reffie.me/jobs/growth-lead
Tools we use: TypeScript, React, Python, FastAPI, AWS, Docker, Lambda, Terraform, FCM, Postgres
Why us: For engineers - we are among the most interesting companies building in person in Toronto today. We bring a Silicon Valley speed to Toronto's startup ecosystem.
For growth/sales - we have been growing 18% MoM for the last 10 months straight. It's an exciting time to join.
Apply by emailing careers [at] reffie [dot] me with role + HN in the subject line. More instructions in each job link.
Pomelo Care | San Francisco, NYC, Remote - USA ONLY with Work Authorization | Software Engineer (mid career - Staff)
Pomelo Care is a multi-disciplinary team of clinicians, engineers and problem solvers who are passionate about improving care for moms and babies. We are Series B, with some notable investors like First Round and a16z. As a member of our engineering team, you will have the opportunity to shape the product, codebase, and culture at Pomelo for years to come. On any given day, you may:
- Write clean, elegant code to build new features and keep our platform humming
- Design new systems to enable Pomelo's clinical team to deliver personalized care to an expanding patient population
- Build a great mobile experience so pregnant women and new parents feel they have a support team in their pocket
Tools we use:
- GCP, Kotlin, Typescript, React, React Native, Terraform, Spanner DB, Big Query, DuckDB, Dagster, DBT, K8s
Personally, I've never had so much fun and learned so much at work. This team is phenomenal, so I recommend applying if you're looking to learn a lot and make a big impact in an important space.
Learn more here: https://www.pomelocare.com/careers
HIFI Labs (https://hifilabs.co) | Remote | Senior Fullstack Engineer / Engineering Manager
Join HIFI Labs and work on innovative projects with well known and iconic musicians. Past artist activations include Linkin Park, Jisoo / Zayn,Rüfüs Du Sol, Dua Lipa, and Mike Shinoda. We're looking for a Senior Fullstack Engineer passionate about design, user interactions, and privacy.
You'll work with TypeScript, React/Next.js, Firebase and explore new frameworks like Astro. Experience with Styled Components, continuous deployment and devops is a plus. We also play around with React Native / Expo.
Sound like a fit? Email us at pierre at hifilabs dot co
Normal Computing | Multiple Roles | New York, San Francisco, London, Copenhagen | ONSITE/HYBRID | Full-time | normalcomputing.ai
Normal Computing is building a new thermodynamic computing paradigm to revolutionize AI reasoning and reliability. We're bridging AI to the world's most sensitive industrial and manufacturing applications, starting with semiconductors.
Funded by top-tier VCs, we're shipping real solutions to customers weekly while pushing the boundaries of AI for hardware. Tech stack: Python, TypeScript, React, AWS, Kubernetes, Terraform, PyTorch, Hugging Face
Open roles:
Full Stack Engineer - Build performant web applications for semiconductor companies. Design visualization tools, diagnostic assistants, and test version control systems. 4-7 years experience, expert in TypeScript/React, backend experience in Python. Bonus: semiconductor industry experience, LLMs, visual design.
AI Engineer - Build production systems that understand chip design specifications and generate code. Ship improvements weekly using LLMs, reinforcement learning, and agentic workflows. Experience with production AI systems, document understanding, PyTorch, prompt engineering. Bonus: mission-critical deployments, RLHF/RLAIF, program synthesis.
Sr DevOps Engineer - Design and operate cloud infrastructure for AI products in semiconductor environments. 5+ years DevOps/SRE experience, AWS, Kubernetes, Terraform, CI/CD pipelines. Bonus: highly-regulated environments, Python/Go, Ansible, ML infrastructure.
Physical Design Engineer - Lead SOC implementation from floorplanning to tape-out for our novel thermodynamic computing architectures. Experience with SOC implementation, Synthesis/PNR/STA, Verilog, physical verification. Bonus: Cadence tools, asynchronous logic, startup experience.
Apply: jobs@normalcomputing.ai with role + HN in subject line
Sitch App | Founding Product Manager | NYC-area HYBRID (2-3 days/week in NYC near Union Square) | Full-time
Sitch is a new type of concierge dating app. We're using AI + Humans to ask you questions, get to know you, then help you find love.
We're an AI powered concierge matchmaker for serious daters. Sitch is live in 5 cities and expanding nationally in 2026.
We're philosophically opposed to the dopamine-fueled mini-game doomswiping of 'traditional' dating apps which cynically monetizes desperation. We're monetizing intent!
* We're top-tier VC funded (a16z Speedrun, M13, early Snap angels) * Looking for a PM who loves building for consumers, loves relationships, is a bit unusual, and is obsessed with building unique experiences only made possible with the new era of LLMs
* 2-3 days/week in person, in Manhattan near Union Square
Site is at https://joinsitch.com, and feel free to send me (Chad) and Dini (co-founder) a note at hi@unusual.inc
Carefeed | Senior Software Engineer and Senior Data Engineer | Chicago, IL
Carefeed makes software that makes it easier to operate senior centers. Our mission is to help make residents, family members and staff happier. Thousands of communities across the US and Canada already use our tools, and we're growing quickly.
We're looking for a Software Engineer and a first Data Engineer to join our Chicago office. Our engineering team is small -- less than 20 people -- so there's a huge opportunity to have an impact. These roles are in person 3-4 days a week in our office at Wacker and Wells in downtown Chicago.
Senior SWE: https://job-boards.greenhouse.io/carefeed/jobs/4972304008 Senior Data Engineer: https://job-boards.greenhouse.io/carefeed/jobs/4961308008
Company: XSELL Technologies Location: HYBRID — Chicago, IL (3 days onsite) Roles: Senior Software Engineer & Senior Machine Learning Engineer
About Us (we’re the hiring company): XSELL Technologies is building an Agentic Voice platform for healthcare—blending ASR/TTS, LLMs, and deterministic orchestration to power human-like conversations at scale.
Senior Software Engineer
Focus: Scalable backend systems, APIs, distributed services, cloud (AWS/GCP/Azure), CI/CD, observability. You’ll: Design and ship high-performance services, own architecture decisions, and collaborate closely with Product/AI. You have: ~5+ years in software engineering (Python/Java/Go/Node), cloud infra, strong fundamentals in systems & APIs.
Senior Machine Learning Engineer
Focus: NLP/speech models, real-time inference, production ML (PyTorch/TensorFlow), monitoring & optimization. You’ll: Build, deploy, and iterate on ML models for conversational understanding and speech intelligence. You have: ~4+ years in ML/NLP, production deployments, strong Python, cross-functional collaboration chops.
Why XSELL:
Hybrid rhythm: 3 days onsite in Chicago, IL (collaboration, whiteboarding, team time)
Fast-paced, mission-driven team with clear ownership
Competitive comp and benefits
How to Apply (we’re actively hiring and will respond): Email your resume to brianna.babich@xselltechnologies.com with the subject “[Role] – Your Name.”
Lightning AI | Full-Stack Engineer, Backend Engineer, AI Performance Optimization Engineer | SF, NYC, or London Hybrid 2 days a week onsite | Full-time
About us: After creating and releasing PyTorch Lightning in 2019, Lightning AI was launched to reshape the development of artificial intelligence products for commercial and academic use.
Apply here: https://job-boards.greenhouse.io/lightningai
Gumroad — NYC (onsite/hybrid) — Hiring Product/Engineering
We build tools that help creators sell directly to their audiences. Small team, big surface area: you’ll ship end-to-end (product → design → code → metrics).
Looking for: strong product-minded engineers (backend, full-stack, or generalist). Bonus if you’ve built marketplaces, payments, or creator tools.
Nice-to-have stack: Rails/Stripe/Postgres/Redis/React/TypeScript—but we value ownership over checkboxes.
Email sahil@gumroad.com with a couple links (GitHub, portfolio) and 2–3 sentences on why you want to build for creators.
Freetrade | London (ONSITE) | Full-time | https://freetrade.io | £75k-£140k
Freetrade is a commission-free investing app used by over 1 million people in the UK. Our team is expanding, and we’re seeking software engineers to evolve and scale our core investing platform. In this role, you will be instrumental in building and maintaining reliable and trustworthy systems for trade execution, clearing and settlement, asset servicing, and internal operational tools. You will also play a key role in shaping our technical direction and mentoring other engineers as our team grows.
Tech we use: TypeScript, Node.js, Postgres, and GCP
Note: We are three days in the office, located just around the corner from Old Street.
We don’t sponsor visas at the moment.
We are hiring across the board in engineering, data, people, marketing, risk & compliance and finance.
See all of our opportunities here: https://freetrade.io/careers
Nango | Staff backend engineer | Remote | Full time | $120-200k + equity
Nango (YC W23) is an open source product: Developer infrastructure for product integrations.
We power the integrations of Semgrep, Motion, Vapi, Exa, and hundreds of other B2B software.
Small but highly experienced team, hard technical challenges (scale + infra devtool running untrusted user code), tons of ownership, direct customer contact, growing very fast.
We are looking for a Staff engineer that can touch every part of stack and is passionate about dev infrastructure.
Website: https://nango.dev Jobs: https://nango.dev/careers