Cosuno | Senior Full Stack Developer (TypeScript) / Senior AI Engineer – LLMs & Agents | Remote (EU) / Berlin | Full-time | https://www.cosuno.com

Cosuno is a fast-growing tech startup reshaping the construction industry with a digital platform for procurement. We use AI to analyze millions of price points, helping construction companies create bids based on real market data. We're looking to expand our team with creative minds who want to solve real-world problems and impact a massive industry. We are an open-minded, collaborative, and international team.

Currently, we're hiring for two key senior roles:

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Senior Full Stack Developer (TypeScript)

Location: Remote (EU) / Berlin

Stack: TypeScript, React, Node.js, Cypress, Kubernetes, AWS

Mission: Take full ownership of features, shaping both the frontend and backend of our product. You'll have the responsibility to extend and build upon our platform to make it more valuable, reliable, and maintainable. We value a trunk-based development workflow with daily releases, comprehensive end-to-end testing, and a solid CI/CD pipeline.

You have: 5+ years of hands-on engineering experience, substantial expertise in JavaScript/TypeScript, and experience with Node.js (React is a plus).

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Senior AI Engineer – LLMs & Agents

Location: Remote (EU) / Berlin

Mission: You will build agentic workflows using state-of-the-art LLMs. Lead the technical development of an agent that helps construction professionals process, improve, and validate complex construction documents. A key part of your role will be establishing and enforcing MLOps and LLMops best practices.

You have: 5+ years of engineering experience, with at least one year working with LLMs. You possess strong Python skills, a proven track record of deploying containerized services (Docker, Kubernetes), and deep expertise in at least one of the following: deep learning (PyTorch, Transformers), ranking/matching algorithms, or LLMops (RAG, evals, fine-tuning).

Interested? To apply and for more detailed information, please see the full job descriptions on our careers page: https://www.cosuno.com/en/company

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...

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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.

HomeVision | Multiple Roles - Eng, SRE, Analytics | Hybrid SF & Remote | Full-Time | $100k-$220k + equity 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.

Please apply here: https://jobs.ashbyhq.com/homevision/a3f79d43-5d9e-46bf-a43f-...

Fusionbox | Python + TypeScript Engineers | United States| Full-time | REMOTE (Legal to work in the US) We're a software engineering consultancy that builds enterprise software the right way. We negotiate the right to open source all our client code, maintain a handful of popular libraries, and our engineers contribute to Django core. We sponsor PyCon, DjangoCon, and Django Girls because we're invested in the ecosystem we build on.

We're looking for software engineers who value software design, system architecture, and collaboration. You should be comfortable with about half of these areas and eager to learn the rest: web application security, relational database design (PostgreSQL, beyond "SELECT *..."), Django internals, React, and distributed systems. What you'll actually work on: complex state machines for financial workflows, multi-tenant architectures with row-level security, custom database functions when the ORM isn't enough, and React frontends that handle real-time data without being a mess of useEffect hooks.

We're a small team where you'll own features end-to-end (database design to React components) and have opportunities to shape technical decisions. You'll get paid to write source code with a team that practices empathy and values work-life balance. If you've ever wished your job involved more elegant state machines and fewer marketing landing pages, let's talk: info@fusionbox.com.

Archera | Mid + Senior level Engineers (Backend) | REMOTE (US/Canada) or Hybrid (Seattle) | Full-time

Archera empowers organizations of all sizes to optimize their cloud costs through unique, short-term, insured GRI (Guaranteed Reserved Instance) and GSP (Guaranteed Savings Plan) commitments.

We’re looking for a Mid and a Senior Software Engineer to join the platform team, working on ETL pipelines, APIs, product features and more.

Stack: Python (SQLAlchemy, Flask), TypeScript (React), PostgreSQL, Snowflake, Argo Workflows, k8s, AWS/GCP/Azure

Benefits: RRSP/401k match, healthcare, stock, wework/home office expenses.

Apply: https://job-boards.greenhouse.io/archera/jobs/4788177008 and email me at simon+hn <at> archera <dot> ai. - there's only one listing at the moment, so if you're a mid-level engineer apply via the listing with a note.

pleasefix.ai | AI Engineers & Backend Engineers | Belgium, Brussels | Full-Time

pleasefix.ai builds Cursor for finance. We’re actively hiring AI Engineers (LLM agents) and Backend Engineers (Cloud, Docker/K8s, Python, Observability, CI/CD) to help us ship production-grade automation fast.

Apply → DM: www.linkedin.com/in/severine-nolf

BuildBetter | Senior Engineer (Backend, Full-stack) | Full-Time | Remote (US) | 170-200k base + equity | Visa Sponsorship not provided

BuildBetter is the product operations platform for customer-led teams. We've built an AI-first product that lets our customers, like Rappi, n8n, and Posthog, automate the operations work that lets them provide their customers with world-class product experiences.

We're looking for two senior engineers to join the team; our headcount has remained small while growing revenue, and we're now bottlenecked by development speed in a way that will make you invaluable. You'll have real ownership over your code from product ideation to customer support, and we'll be making substantive product updates weekly. We're looking for team players who are as fun to work with as they are productive, and are willing to compensate these two rolls commensurately - our aim is to be in the 95th percentile of equity compensation, and we expect that in exchange we'll have value-aligned employees who will help us grow the business.

Joining us will mean solving hard problems at the frontier of AI adoption, including:

- maintaining performance at scale

- building and maintaining rich frontend user experiences that maintain the standards of usability and delight that our customers know us for.

- building agent and workflow systems that automate real work for customers

- playing around with the latest models to figure out new experiences that we can offer our customers as cutting-edge models get released monthly

- building automation that's grounded in supporting product teams rather than automating them - our bet is that this is the likelier outcome out of the current generation of AI systems

Stack: Postgres / TS (Nest + React) / Hasura / EKS / S3 / LLM APIs / Python

Benefits:

- unlimited PTO

- $100/mo education stipend

- flexible hours: we measure productivity in terms of outcomes, not time, so as long as you're able to stay aligned, productive, and in regular communication, we don't really care what hours you work

- health insurance

Please reach out to: nikhil (at) buildbetter (dot) app

RhythmScience | https://www.rhythm360.io | Multiple Roles | REMOTE (US-Based Preferred) | Full-time

RhythmScience is a cardiac data management company turning complex healthcare data into actionable insights for providers and patients. We're a remote-first team building software that directly impacts cardiac patient care.

If you enjoy building reliable software alongside experienced and respectful colleagues, we'd love to hear from you!

Data Engineer - Build and maintain ETL pipelines, data models, and analytics infrastructure. 3+ years experience with Python, dbt, BigQuery, and orchestration tools (Airflow/Dagster).

Software Engineer - Ship features across backend and frontend, automate clinical workflows. 3+ years with Python/Django, Vue, PostgreSQL, CI/CD, and observability tools.

Senior Software Engineer - Scale K8s infrastructure, build test automation, partner directly with other technical teams. 5+ years, expert Python/Django, K8s, AWS. Healthcare/HIPAA experience preferred.

Email your resume and a few words that best describe your career trajectory hn@rhythmscienceinc.com

Document Crunch | REMOTE(US) / HYBRID

Company description: We do construction compliance AI. We're in series B, about $40m raised. Growing a lot! Feel free to reply or DM me if you want some more info.

Tech Stack: Typescript full stack except for Python for ML, NestJS backend, NextJS frontend, React Native mobile, IaC in Pulumi using TS.

Open Jobs:

- Senior/Staff/Principal Frontend Engineer (fullstack Typescript nice to have)

- Senior/Staff/Principal Node Engineer (fullstack Typescript nice to have)

- Senior/Staff/Principal QA Engineer

Location: Austin or Texas preferred, but open to remote for the right candidate in the US.

Jobs page: https://www.documentcrunch.com/careers#open-roles

For the roles not listed yet, email us directly at PeopleTeam@documentcrunch.com

GreenTriangle | Senior Software Engineer (Product/Frontend) | Remote (EU only) | https://green-triangle.com

We're making crop insurance accessible to farmers worldwide. Our platform helps major insurers monitor 10M+ hectares across 10+ countries using satellite imagery and ML — so farmers can manage the volatility of their industry.

You'll build web & mobile apps that agronomists use daily in the field (offline-capable, rough conditions), work on data-heavy features cramming gigabytes into mobile apps, and help shape product decisions with real autonomy.

Stack: TypeScript, React/React Native, PostgreSQL/PostGIS, Python + GDAL/NumPy for satellite imagery processing.

Small remote-first team, wear multiple hats. Quarterly in-person meetups.

chris@green-triangle.com

Saildrone | Multiple Roles | Onsite/Hybrid (US Only) | SF Bay Area (Alameda) | Full-Time | https://www.saildrone.com/

Saildrone is the world's leading collector of ocean-related in situ data via uncrewed vehicle, above and below the sea surface. We work with navies across the world to deliver insights about waterways, contribute to safety of life at sea, and mitigate illegal fishing and trafficking. Additionally, we work with governments, civic agencies, foundations, universities, and private companies around the globe to derive better information about our oceans and seas - be it sailing drones into the eye of hurricanes to obtain new scientific storm data, mapping out the ocean floor, collecting new CO2 data in hard-to-reach areas, or counting biomass to establish fishing quotas.

Maybe you saw that we've repeatedly hucked drones into category 4 hurricanes[1]. Or maybe that we completed a transoceanic cable survey for Meta[2]. And maybe you saw that we just announced a large partnership with Lockheed Martin[3]. Or maybe you didn't see any of that, but you're still intrigued by the idea of autonomous, long endurance sailboats that help us better understand and secure our planet.

Whatever the case, we're hiring for a breadth of different positions across our organization. In software, we're hiring for folks in our Perception, Platform, Frontend, and Vehicle teams. Stacks vary from team to team, but we're looking primarily for folks with backgrounds in C++, Python, and/or JavaScript (Node, TypeScript, React). All software positions are hybrid roles based out of Alameda, just a quick ferry ride across the Bay from San Francisco.

In addition to software engineers, we're also hiring for a bunch of other positions across the company in production/manufacturing, technical operations, and more.

You can see a list of open positions on our career page: https://www.saildrone.com/careers

Please apply through our career page; be sure to select "Other" and specify this HN post when asked how you heard about us!

[1]: https://news.ycombinator.com/item?id=28715110

[2]: https://www.saildrone.com/news/revolutionizing-deep-water-ca...

[3]: https://www.saildrone.com/media-room/press-releases/lockheed...

Metly | Founding Engineer / AI Engineer | Remote (UTC ±2) | https://www.meetmetly.com/

Metly is a pre-seed startup (team of 5) building strategic intelligence for pharmaceutical companies. We're aiming to replace consultants. Pharma companies hold critical knowledge across disconnected systems—regulatory filings, clinical pipelines, competitive intelligence—none of it linked to real market activity. We're building the layer that connects it all and makes it actionable.

You'll be working on the hard parts of getting LLMs to construct knowledge graphs users can actually trust: entity extraction from dense regulatory documents, grounding outputs with verifiable citations, and turning unstructured data into clear recommendations.

Stack: TypeScript/Python, React on TanStack, PostgreSQL, Kubernetes on GCP. We have traction and are moving fast in 2026. Competitive salary and meaningful early-stage equity.

graeme(at)meetmetly.com

Starbridge | Senior Engineers (Kotlin/Java/React/Typescript) | NYC or Remote | Full-time | starbridge.ai

Starbridge is building an AI platform that turns large-scale public and enterprise data into reliable sales insights. We are early, moving fast, and building from zero to one, so this role will have huge ownership and product impact.

Backend Engineer: (looking for Kotlin/Java/Scala experience). You'll work across the backend: building enterprise integrations, large-scale scraping and parsing pipelines, and systems that let users apply LLMs to millions of documents to generate insights at scale.

Product Engineer: (React/Typescript) who would work closely with product and design to build user-facing parts of the platform. You will craft performant, stable frontends that explain technical concepts to non-technical users and help us iterate fast based on customer feedback.

AI Engineer: Applied AI plus strong software engineering. You will build, evaluate, and deploy LLM-driven features like deep document analysis and interactive chat, working with models from OpenAI, Anthropic, and Gemini. Expect hands-on Python, ML system design, experimentation, and production reliability. Bonus for RAG depth and frameworks like LangChain, LlamaIndex, or Hugging Face.

We're looking to build our in-person team in NYC but also open to remote!

Apply: https://starbridge.ai/careers and mention HackerNews or email melissa@starbridge.ai with your resume.

Mending | https://mending.com | REMOTE (in US) | Full-time | Product Engineers Mending is a team of healthcare nerds, software engineers, product designers, direct primary care doctors, health insurance experts, and more. We are building a healthcare system that makes sense, starting by redefining the role of health insurance – one that focuses on reducing friction for doctors and patients, and investing in ways to create more meaningful doctor-patient relationships.

* Product Engineer: https://www.mending.com/careers/product-engineer

We’re looking for a motivated and impact-oriented Product Engineer to join our small team of 5. Your primary focus will be building data pipelines and backend systems that automate and improve workflows for patients, providers, and internal operations.

You will be instrumental in ensuring seamless interactions from efficient patient support and operational workflows to reliable payment processing, which are powered by the robust systems you design and implement. As a key contributor, you will partner closely with internal stakeholders and external customers, translating insights into product requirements documents that directly drive your work.

Tech stack: Python (flask, temporal) on the backend, Nextjs/React on the frontend

Trunk | https://trunk.io

Marketing Lead (Developers) - Remote friendly | Forward Deployed Engineer- Software Engineer II | DevRel Engineer - San Francisco| Staff Full Stack Engineer - San Francisco | Sr Full Stack Engineer - San Francisco

Trunk is an a16z funded (25M) Series A dev tools startup, redefining software development at scale. At Trunk, our mission is to help teams create high-quality software quickly. 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.

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

Radar Labs | Software Engineers (SRE, data platform, backend, full-stack, mobile) | Remote (US), NYC | Full Time | https://radar.com

- Radar is the geo-location dev tool

- Doing 1B+ API calls per day

- Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).

- We're based in NYC with our HQ in Union Square and remote friendly (US)

Interesting things we're working on:

- HorizonDB, our Geospatial database written in Rust

- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband, other mobile sensors and ML.

- Extracting raw map data from satellite maps and the web leveraging ML and AI

- Anomaly detection to identify spoofed locations

- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time

- Multi-Region AWS K8s deployment, 99.99%+ availability

- Frontend tools to visualize and debug location data at scale

Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com

Olli Health | Remote w/ Annual Travel | Full-Time | Senior ML/NLP Data Scientist | ollihealth.ai

We are a TechStars NYC ‘24 startup dedicated to modernizing home healthcare with advanced AI tools and we are expanding our team again! These are pivotal hands-on roles that will begin shaping our product from day 1. We are backed by top healthtech and AI-focused VCs investors (Cannage Capital, Arkitekt Ventures, and Tau Ventures) and have been moving lightning fast to build incredibly valuable tools in home health.

We are looking for:

- Proven success in the fast-paced 0 to 1 early days of young startups (experience on founding team or pre-seed ideally). Work will be optimized based on your preferred balance, and what gives you energy. - Experience (5 years+) with most of our stack: AWS, PostgreSQL, Python (FastAPI), Pytorch. Role involves devops, data engineering, evals & benchmarking, workflow optimization, etc. - Able to demonstrate hands-on-keyboard coding chops. Roles are primarily IC + collaboration with our team, and room to grow into startup leadership. - Comfort interacting with ML/NLP and LLM-native data engineering problems - PhD-level ML + proven expertise training, and deploying models for production use - Experience working with healthcare data (not required but highly valued)

Comp: $185k-$230k annual FTE base comp + equity package. We cover 100% of Health, Vision, Dental, Life insurance premiums.

I’m Olli’s CTO and these positions will work directly with me and our core (currently 7-person) engineering team. hiring+hn [] ollihomehealth [] ai - Email me with questions, for a full JD, or to send your CV. No staffing or recruiting firms, please, individuals only.

Ionworks | Founding Systems Engineer | Remote (US) or Pittsburgh, PA | Full-time

Ionworks builds battery simulation and optimization software used by R&D teams designing next-generation batteries. We are looking for a founding backend / systems engineer to own big pieces of our backend and help us scale from a few early customers to broader industry use.

Work: - FastAPI, async Python, Supabase/Postgres - Designing APIs and data models for simulation and optimization workflows - Performance and reliability work across the stack (queries, async, concurrency, resource limits) - Job orchestration for running and tracking simulations - Observability: logging, metrics, tracing, debugging real issues

We are especially interested in people who work in a "vibe engineering" style: using LLMs and coding agents as accelerators, but still planning ahead, writing tests, supervising agents, and staying fully responsible for code quality and architecture. If you already use AI tools this way in your day-to-day work, you will fit in well here.

Stack: FastAPI, Python, Supabase/Postgres, distributed compute for simulations, AI-assisted dev.

Benefits: competitive salary, meaningful equity, remote-first, unlimited PTO, 401k match, medical/dental/vision, paid parental leave, home office budget.

If this sounds interesting, send a short note to valentin@ionworks.com with "HN backend" in the subject and fill in the application here: https://apply.workable.com/ionworks/j/A8C2F4287C/

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

The General Intelligence Company | Senior Product Engineer | Build the OS for Autonomous Agents | Full-Time | NYC | $260K - $300K + 0.3-0.41% Equity | cofounder.co

The Upside & Opportunity: Join the founding team building Cofounder, the autonomous agent platform designed to run entire business workflows (Slack, Notion, GitHub, etc.) end-to-end. We are building the operating system for one-person, billion-dollar companies. High ownership, zero bureaucracy, and maximum impact.

About The General Intelligence Company Founded in 2024, our mission is to automate business tasks. We are focused on solving the hard problem of reliable, end-to-end agent execution, turning complex LLM capabilities into dependable, real-world workflows.

You'll own the end-to-end agent experience, building and scaling Flows and Integrations. You will ship across the stack: React/Next.js (TypeScript) for novel human<>agent UX and Python FastAPI on the backend, focusing on performance and reliability. We need someone who can make powerful agent systems feel simple and reliable for users.

Stack: React/Next.js (TypeScript), Python FastAPI, Background Workers, Postgres.

If you're interested please submit an application here: https://generalintelligencecompany.cookd.dev/jobs/senior-pro...

We're also hiring an applied AI engineer! https://generalintelligencecompany.cookd.dev/jobs/applied-ai...