Inventive.ai (YC S23) | Senior Fullstack Engineer | Mountain View, CA | Hybrid | AI for PreSales | Growing rapidly

Our mission is to build intelligence that helps B2B sales teams win deals. Our first product is a suite of AI agents for sales teams that helps create winning proposals and RFP responses for $1.4 Trillion dollar industry.

Our founding team is from Google Deepmind, Stanford, UC Berkeley, and IIT. We were part of Y-Combinator S2023.

Role & company description: https://inventiv.notion.site/Senior-Full-Stack-Product-Engin...

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.

BackNine Insurance | Remote (US) or Westlake Village, CA | Full-time | https://back9ins.com

BackNine is a B2B2C insurtech platform that automates the insurance sales process. Thousands of companies—from brick-and-mortar agencies to publicly traded banks—use BackNine to quote, apply, and manage insurance online.

We’re looking for an engineer to own and expand our API integrations with external systems, especially CRMs (e.g., Salesforce, Applied Epic).

https://back9ins.com/careers

Onton.com | Fullstack & Research Engineers | San Francisco, CA | Hybrid Join us in pioneering the future of e-commerce search. Growing rapidly.

We're a hard-working team of 10. We have an office in Jackson Square with a great view that we're looking to fill with other high-performance people!

Tech-wise, it's React/Typescript + Julia, if that's interesting (no worries if you haven't used it). We've also built our own graph and vector DB to cope with the scale, and the foundations of a neuro-symbolic AI agent that learns more about the world on every search!

Job posting and more information here → https://onton.com/careers

We read and respond to every application.

Stellar Science | Hybrid (USA) Albuquerque NM, Washington DC (Tysons VA), Dayton OH | Full time, interns/co-ops | U.S. citizenship required | https://www.stellarscience.com

Company: We're a small scientific software development company that develops custom scientific and engineering analysis applications in domains including: space situational awareness (monitoring the locations, health and status of on-orbit satellites), image simulation, high power microwave systems, modeling and simulation, laser systems modeling, AI/ML including physics-informed neural networks (PINN), human body thermoregulation, computer vision and image processing, high performance computing (HPC), computer aided design (CAD), and more. All exciting applications and no CRUD. We emphasize high quality code and lightweight processes that free software engineers to be productive.

Experience: Except for interns, we currently require a Bachelors degree in physics, engineering, math, computer science, or a related field. Masters or PhD is a plus. (Roughly 25% of our staff have PhDs.)

Technologies: Lots of C++23, Qt 6.9, CMake, git, OpenGL, CUDA, Boost, Jenkins. Windows and Linux, msvc/gcc/clang/clangcl. AI/ML and analysis projects use Python and C++. Web projects use Java and Typescript/React.

Apply online: at https://www.stellarscience.com/careers/.

Innolitics | Multiple Roles | Fully Remote | https://innolitics.com

We help companies develop medical device software.

Medical Device Software Engineer (https://innolitics.com/join/medical-device-software-engineer...)

Senior Web/Mobile Medical Device Engineer (https://innolitics.com/join/senior-web-mobile-medical-device...)

Senior Regulatory Affairs Specialist AI/ML SaMD (https://innolitics.com/join/senior-regulatory-affairs-specia...)

Physician-Scientist (MD or equivalent) – Biostatistics & ML Development for Medical Device AI (https://innolitics.com/join/physician-scientist-md-or-equiva...)

Aurelian | Multiple roles | Seattle, WA | Full time | https://www.aurelian.com/

Aurelian is automating non-emergency calls for dispatch centers around the US! We free up dispatcher time so they can focus on emergencies, and provide better service to the public, who don't have to wait on hold for simple requests. Series A, 11 engineers today, growing quite fast and looking for engineers/engineering leaders/product managers/anyone who can build and solve problems to join us

All our open positions are listed here: https://www.aurelian.com/careers

In person only for eng/product roles

You can also shoot me an email - trevor at our domain

SpruceID (YC W21) | REMOTE (US-Based Preferred) | Full-Time | spruceid.com

Spruce lets users control their data across the web. Instead of users logging into platforms, we believe platforms should request to access data vaults controlled by users.

The demand for trusted digital ID is accelerating as AI deepfakes begin to destroy most of the ways we use to verify identity today. How private or secure is it to hold your driver's license or passport up to a webcam to get a bank account? Was it ever private or secure? Stable diffusion can break so much of this already. Society will need trusted digital IDs and credentials. Our mission is to allow them to be controlled by individuals, with safeguards to prevent descents into surveillance states and checkpoint societies.

We are the main implementers of category-defining initiatives such as the digital ID program for the California DMV, and the verifiable digital credentials program in Utah. We are private sector participants in NIST's National Cyber Security of Excellence initiative for privacy-preserving digital ID.

We are hiring skilled engineers who care about making a real impact in improving public services, digital autonomy, and user privacy for the world. We work closely with public sector agencies, and have high regard for public servants. We have a strong engineering and customer-oriented culture, and are not simply a SaaS product or AI wrapper. Our roles are not for the faint of heart: you will be expected to work hard and learn a lot in this role.

Our engineers are ambitious to get outcomes for our customers and their constituents. On any given day, they may write great Rust/C#/TypeScript, deal with mainframe dumps, read policy documents, respond to technical RFIs/RFPs, manage on-prem environments, implement new NFC + Bluetooth protocols in Swift/Kotlin, create CI/CD processes that enforce W3C accessibility guidelines and i18n requirements, rewrite lost specs from disassembled binaries, figure out stablecoin payments, and design new protections for public key infrastructure. It is a team effort, and people with T-shirt shaped skills are able to collaborate and learn a ton from each other every day.

We are interested in candidates who want to be proud of the meaningful impact they make for society, even if it takes time to get right. This is not the right job for someone who wants to "join a cool new AI startup" that implodes or exits in under a year.

See our roles here: https://jobs.ashbyhq.com/spruceid

Hiring for engineers to work on mngr! https://imbue.com/product/mngr/

Kai | Engineering (Multiple) | Onsite (San Jose, CA) | Full-time

Ai + Cybersecurity. Our Ai team is well funded, and growing. Although we have a dedicated engineering team, the Ai team is looking for dedicated engineers to work closely with the applied Ai scientist to build the platform and pipelines.

Principal Software Engineer, AI Platform: https://ats.rippling.com/kai-cyber-inc/jobs/a6d62968-4831-42...

Senior Software Engineer, AI Platform: https://ats.rippling.com/kai-cyber-inc/jobs/d567048a-7b1b-4e...

We are also looking for a few more applied Ai scientists as well as many other roles. I invite you to take a look:

https://www.kai.security/careers#open

213 comments as of $TIMESTAMP, 11 hours after thread opened. Lower than I've seen in quite a while.

CVector | Software Engineers, Senior Research Engineer | New York City (FiDi) | ONSITE | Full-time | VISA SPONSORSHIP

CVector builds software to bring real time economic optimization and AI prediction to every energy and manufacturing plant. We integrate real-time data visualization and analytics to help power generation stations, chemical plants, and other critical infrastructure make informed decisions in rapidly changing environments. You'll help create intuitive, robust web apps, machine learning models and backend systems, shaping tools that directly impact industrial operations and energy reliability. Build AI agent systems that automatically foresee upcoming problems and provide possible solutions.

CVector recently raised $5M seed, read more on TechCrunch: https://techcrunch.com/2026/01/26/ai-startup-cvector-raises-...

Full Stack and Backend Software Engineers: We're looking for a passionate Software Engineers comfortable working across our stack (Python, Typescript, React, Supabase, MQTT, TimescaleDB, PostgreSQL, AWS, FastAPI) or someone to specialize in our backend infrastructure.

Senior Research Engineer: Candidates should be experienced with machine learning, and analysis using Python.

Reach out to me at jnapoli+hn@cvector.com

Thunder Compute (YC) | C++ Systems SWE | San Francisco (Onsite) | https://www.thundercompute.com

Thunder Compute is a GPU cloud for developers built on a proprietary software stack of C++ and GoLang. You will solve hard systems problems in production.

Quant dev / HFT SWE experience preferred, team from CitSec, Aquatic, Old Mission, AWS.

Email me: carl@thundercompute.com

Promptless (YC) | Founding Docs Practice Lead | San Francisco (Onsite) | Full-time | $140k–$200k + equity

Promptless builds AI agents that automatically update customer-facing documentation. Startups, CNCF projects, and Fortune 500 companies use us. YC-backed with a seed round from top VCs and angels.

This is a one-of-one role. You'll own the documentation practice at Promptless: onboarding customers onto the platform, building the methodology for AI-assisted documentation, and growing our reputation as the company that makes docs teams more effective. Think practice lead at a top consulting firm, except the domain is docs and the leverage is AI.

You should have deep experience in technical documentation (developer docs, API references, support content), be comfortable reading code, and be excited about pushing the boundaries of LLM-assisted writing. You'll be building this function from scratch, so an entrepreneurial mindset is key.

Read more: https://promptless.ai/jobs#founding-docs-practice-lead

Email us directly: founders@promptless.ai (mention HN!)

--- ALSO ---

Promptless (YC) | Founding Engineer | San Francisco (Onsite) | Full-time | $140k–$200k + equity

As a Founding Engineer, you'll build the core product—AI agents, integrations, and infrastructure that powers automatic documentation updates.

Read more: https://promptless.ai/jobs#founding-engineer

Same deal. Email us directly: founders@promptless.ai (mention HN!)

Charge Robotics | Multiple Roles | Full-time | Onsite | SF Bay Area

Hi HN! We’re a YC-backed, Series-A startup building robots that build large-scale solar farms.

Check out a video of our first system here! https://youtu.be/ZZ2fP1Y5Z2E

It turns out that construction companies literally can't build solar fast enough, so what we're doing is a crucial part of switching the grid over to renewable generation.

You’ll be a key contributor, helping bring our next generation of mobile solar factory to life.

Come work with us if you love:

* Fast-paced prototype development with software and hardware components

* Making a positive climate impact through your work

* Hacking on massive construction equipment!

Senior Robotics Software Engineer: https://jobs.ashbyhq.com/charge-robotics/b2aa347c-4738-4065-...

Senior Mechanical Engineer: https://jobs.ashbyhq.com/charge-robotics/19133a2e-f262-4f3d-...

Lots more: https://jobs.ashbyhq.com/charge-robotics

ur mum

Puma.tech | Remote-first with PST overlap | iOS/MacOS, Android, Ai/ML, Growth | https://puma.tech

Hi all, I’m Yuriy, founder of Puma.tech. Prev. worked at Cloudant (YC S08), Meteor (YC S11), Parse (YC S11, Facebook/Meta), and explored AI/ML (computer vision for self-driving cars).

We have 3 products:

1. https://PumaBrowser.com – iOS & Android mobile browser with built in LLMs & Wallets. Private by design. 1m+ downloads.

2. https://PumaAI.com – privacy layer between you and LLM providers.

3. https://PumaClaw.com – (just starting to build) easier way to run and manage your Claws from the phone.

Help building either or all is much appreciated.

Open Roles: Eng (iOS/MacOS, Android, Ai/ML, Browser Extensions), Based Social Media Intern; Internships: Eng, Design, Growth

We’ve raised a few rounds from some of the best builders in crypto and ai:

Protocol Labs (YC S14), Chris Larsen (Ripple), Anatoly Yakovenko (Solana), Illia Polosukhin (NEAR Protocol), Sridhar Ramaswamy (Snowflake CEO), Jason Warner (poolside.ai, ex-GitHub CTO), Don Ho (Orange DAO, Quantstamp W18), Evil Rabbit (Vercel), John Phamous (SF Compute) and other amazing builders.

How to Apply: email careers+hn [at] puma.tech with your GitHub, a note on what you're most proud of building and what you'd like to build next.

Thank you!

ando.work | algorithms/AI eng and product mgmt | Remote (SF) | Full Time

Ando provides flexibility for hourly workers starting in restaurants, changing the lives of 80M+ people. Backed by Zero Capital, Slow Ventures and Blitzscaling.

- algorithms/AI, ideally with production experience in scheduling and assignment and also reasoning LLMs.

- product mgmt, ideally with early stage startup experience in enterprise SaaS and restaurant IT systems e.g. 7shifts, toast, etc.

https://www.ando.work/careers or DM me

DM me for intro with resume/linkedin. I'm #proudinvestor and experienced with OR algorithms.

Honey Homes | Early Engineer (Full-Stack / AI) | REMOTE (US) | Full-time

We make homeownership effortless by pairing homeowners with a dedicated handyman and building the software that runs the home.

We're a small team with a product that's growing quickly, and we're backed by top investors. If you like building end-to-end systems with real-world impact, come join us.

Please get in touch at: https://jobs.ashbyhq.com/Honey%20Homes/b3cdd2cd-ffde-41f6-b8...

ClickHouse | Senior Cloud Software Engineer - Distributed Systems / Cloud Databases / Kubernetes | Remote Hiring in the US right now. Seniors/Staff/Principal levels

ClickHouse is a popular, Open-Source OLAP Database. We are ClickHouse Inc, the company behind the database aiming to build the best in class real time data warehouse.

I am hiring for AutoScaling as well as Distributed Cache Production Engineer Roles

What we are looking for:

Distributed Systems / Cloud Engineers to build

    - AutoScaling Systems for a Cloud Database

    - A Distributed Caching Layer on top of S3 [0]

We also maintain our own ClickHouse-based Data Infrastructure. Bonus points if you've worked on auto-scaling or other data-driven forecasting challenges in the past.

    Can work in a fast moving scale-up environment. Proactive and hands on.

    You must be independent and self-organized.

    Go, Kubernetes, Distributed Systems in general

    You'll need to be able to do On-Call - debugging production infra or db issues

    Low-level database programming (C++, ClickHouse) - This is crucial for the cache.

PS: If you're a pure DevOps person or a pure Data Engineer who wrangles data tools, please read the above requirements carefully before firing off an email. This role is an intersection of a lot of sub-roles, not a particular specialization

[0] https://clickhouse.com/blog/building-a-distributed-cache-for...