Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. We strive to design and build step-function improvements over existing blockchain solutions. After raising $225M in series A funding, led by Paradigm, we are growing our team.

Senior Software Engineer, Compiler:
https://jobs.ashbyhq.com/category-labs/e5c34899-cea1-4d25-be...

Smart Contract Engineer (Solidity):
https://jobs.ashbyhq.com/category-labs/776ce314-aa12-471b-92...

We are currently seeking a talented and driven Java Developer to join our team full-time. This is an exciting opportunity to contribute your skills and expertise to a venture backed funded fintech trading firm with emphasis in US equities capital markets tech based out of the New York City and in exchange we’ll provide you with base comp $125k-200k, full benefits, cash bonus, and equity.

Requirements:

- Electronic trading server-side software development experience

- Experience in Open Source technologies such as Aeron Transport, Aeron Cluster, Aeron Archive, Artio, Agrona, or CoinTossX is a big plus

- Experience with Adaptive Hydra trading platform is a big plus

Benefits:

- Flexible hybrid schedule to accommodate other commitments

- Collaborative and supportive team environment

- Relocation assistance to NYC Metro area

If you are passionate about Java development and interested in joining a fintech venture, we would love to hear from you. Please submit your resume if interested to agency@furtimmodus.com in this opportunity.

Antioch is building the simulation platform for robotics and perception systems. Spin up full-stack digital twins, run scenarios to test and validate behavior, and deploy, entirely in software.

Role:

Build high-fidelity models of sensors and physical components:

— Design and implement simulation capabilities for sensors, actuators, and interactivity (contacts, dynamics, timing, noise, artifacts, etc.).

— Build and calibrate simulations for one or more sensing modalities (e.g. cameras, lidar, radar, infrared/thermal, UV), including realistic failure modes and edge cases.

- Model the full sensor pipeline where relevant: optics/RF + noise sources + signal processing (e.g. camera ISP behaviors, radar DSP stages).

Partner directly with customers to ingest their existing physical systems into Antioch (robots, sensors, actuators, environments):

— Translate incomplete specs + messy real-world data into working simulation models with clear assumptions and documented gaps.

— Drive the integration to completion: “runs in sim, matches reality within defined tolerances, and is usable by the customer.”

— Design and implement simulation capabilities for sensors, actuators, and interactivity (contacts, dynamics, timing, noise, artifacts, etc.).

— Build and calibrate simulations for one or more sensing modalities (e.g. cameras, lidar, radar, infrared/thermal, UV), including realistic failure modes and edge cases.

How to apply:

Submit an application to
https://antioch.com/careers/38387

OR

Email Jackson at jackson@antioch.com with your resume and answers to the following:

- Please explain what robotics simulation experience you have had (i.e. Isaac Sim, MuJoCo, Pybullet, Gazebo, etc.)

- Please explain what sensor simulation experience you have had (Radar, Camera, LiDAR, Infrared, etc.)

- Please explain what excites you about this role!

Pinwheel is the Plaid for payroll — APIs and SDKs that give banks, fintechs, and lenders real-time, consumer-permissioned access to payroll data across 1,800 platforms covering 80% of US workers.

- Fullstack Engineer (backend-leaning) -
https://grnh.se/y0rp77go3us (Python / Django, Go)

- Fullstack Engineer (frontend-leaning) -
https://grnh.se/1e2ort3e3us (React, Next.js)

Hybrid 3x/wk in NYC (Union Square)

Visa sponsorship not available.

We are a team of expert researchers and engineers focused on securing embedded devices. We work with partners across critical industries, and on government-funded research programs (think DARPA). "Full-stack" for us doesn't just stop at back end code; it means being comfortable with operating systems, firmware, and signals going over the wire. You'll succeed here if you are a quick learner who loves working independently on tough, technical problems nobody has ever solved before.

Day-to-day tasks might include:

* Tearing apart a device in our lab, reverse engineering its firmware, and finding security vulnerabilities

* Developing an automated, robotic platform for hardware reverse engineering (custom hardware, vision models, user interfaces, etc.)

* Hooking and patching RTOS kernel functions to execute defensive device integrity validation code, without violating real-time requirements

* Building scalable servers for processing millions of device telemetry messages across thousands of concurrent connections

* Maintaining open-source reverse engineering tools (like OFRAK
https://ofrak.com) and cooking up fun demos for hacker conferences (like this web game we built for DEF CON in 2023
https://ofrak.com/tetris/)

Our main office is in Manhattan, but we are building out a new office in Northern Virginia. US citizenship required. Bonus points if you have an active security clearance, or are willing to get one.

https://www.linkedin.com/jobs/view/4367488549

Bubblehouse is a fast-growing custom loyalty platform, tripling the revenue each year. Headquartered in NYC, the entire team is fully remote and spread across the globe. We power loyalty programs for brands like American Girl and Old Spice.

We’re expanding our lean team of extremely experienced developers. Companies are switching from other platforms thanks to the customizations and flexibility that we offer, enabled by our pace and technical excellence, which we intend to keep for years to come.

We run on Golang and use custom data storage on top of local key-value stores, colocating the storage and compute on dedicated hardware servers, and reading data directly from mmap’ed pages of the database. Ever came across HN saying that one can run Twitter on a single machine these days? We’re doing that in production.

Zero lines of React, almost zero third-party dependencies (carefully vetted), every line of JavaScript manually written with respect and understanding of the web platform. We render HTML server-side like it’s 2005.

Looking for:

1. Top to bottom understanding of the software stack, from the modern-ish web platform to CPU caches.

2. Thinking and problem solving outside the box. (We don’t _always_ go for unconventional solutions, but we do it often enough to require a person who can do justice considering the entire problem space at every step.)

3. Demonstrated ability and hunger to learn new things quickly. (Every month we’re doing things we have never done before.)

4. Broad experience across multiple programming paradigms, platforms and software stacks.

5. Demonstrated care for the software craftsmanship (which can take many forms).

6. Great spoken English, and ability to communicate 9am to noon in New York time zone.

We give you a literally fast-paced environment (with features delivered in days) where you need to solve very challenging problems with practical advanced technology, take on entrenched market leaders, and help entrepreneurs across small and large businesses delight their fans.

Send a plain text cover letter to andrey+hiring@bubblehouse.com. Help us see how you stand out. Summarize your experience. Link to 1–5 impressive things you’ve built and proud of, link to where we can see some of your code, include your portfolio/CV, describe the platforms and stacks you’re an expert in. How did you start programming? What are you most passionate about in technology? What are the most interesting or weird things you’ve done? What are your strongest held professional opinions? Please make your email easy to read, we’ll appreciate that.

(If you have applied before, no need to re-apply, we’ll reach out.)

Every day, Bloomberg’s clients rely on secure and seamless access to our products. Our team makes that possible by building infrastructure that verifies identities for both clients and employees. We design systems that are fast, resilient, and highly available, capable of handling large volumes of authentication traffic around the clock.

We are embarking on an initiative to modernize and unify Bloomberg’s authentication landscape. Your work will directly affect the experience of Bloomberg’s employees and clients worldwide.

You'll need to have

- Experience guiding the architecture of large scale authentication systems.

- Experience developing or operating Open ID Providers, Authorization Servers, and Identity Providers

- Deep understanding of OAuth, OIDC, SAML, FIDO or similar protocols

You can expect to

- Lead design and development of Bloomberg’s next-generation authentication and MFA systems, aligning with future product goals

- Create scalable, end-to-end identity solutions across web, API, and proprietary technologies

- Collaborate with cross-functional partners across product, design, and engineering

Apply:
https://bloomberg.avature.net/careers/Public?jobId=17745

Note, I'm an engineer on the team and would be happy to answer any questions.

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 roles:

Lead Software Engineer (
https://jobs.lever.co/findigs/1ea92751-1c85-4eb6-84b4-86c529...)

Senior Software Engineer (
https://jobs.lever.co/findigs/3b39616d-223f-4326-a500-f804c3...)

Mid-Level Software Engineer (Mid-Level) (
https://jobs.lever.co/findigs/5e865781-244f-4e4f-b7bd-e09973...)

Competitive Base Salary plus Pre-IPO Equity

401k Matching up to 4%

Unlimited PTO

Lunch in office every day, home office setup stipend, monthly gym stipend

Our mission is to develop the best education in the world and make it universally accessible. Our culture is eng-driven, friendly, and very data-driven thanks to our large userbase. Check out our blog to see what engineering at Duolingo can look like:
https://blog.duolingo.com/hub/engineering/

Tech stack: (frontends) Swift/Kotlin/TypeScript, (backend) Python/Kotlin/Postgres/Dynamo, (infra) AWS/k8s/Terraform.

We're always hiring for engineers. A few roles below:

Senior Engineering Manager, Chess (NY)
https://careers.duolingo.com/jobs/8385137002

Senior Android Engineer (NY)
https://careers.duolingo.com/jobs/8217266002

Senior iOS Software Engineer (NY)
https://careers.duolingo.com/jobs/8318257002

Engineering Director (London)
https://careers.duolingo.com/jobs/8444624002

Senior Gameplay Programmer (London)
https://careers.duolingo.com/jobs/8424809002

Base salary: $177-240K for the NY-based roles, unsure about the London-based roles.

Perks: free lunch, 2-week winter break + 20 days of flexible time off.

Every day, Bloomberg’s clients rely on secure and seamless access to our products. Our team makes that possible by building infrastructure that verifies identities for both clients and employees. We design systems that are fast, resilient, and highly available, capable of handling large volumes of authentication traffic around the clock.

We are embarking on an initiative to modernize and unify Bloomberg’s authentication landscape. Your work will directly affect the experience of Bloomberg’s employees and clients worldwide.

You'll need to have

- Experience guiding the architecture of large scale authentication systems.

- Experience developing or operating Open ID Providers, Authorization Servers, and Identity Providers

- Deep understanding of OAuth, OIDC, SAML, FIDO or similar protocols

You can expect to

- Lead design and development of Bloomberg’s next-generation authentication and MFA systems, aligning with future product goals

- Create scalable, end-to-end identity solutions across web, API, and proprietary technologies

- Collaborate with cross-functional partners across product, design, and engineering

Apply:
https://bloomberg.avature.net/careers/Public?jobId=17745

Note, I'm an engineer on the team and would be happy to answer any questions.

We build kinetic sculptures that shouldn’t exist. A small team of designers and engineers, creating massive, data-driven installations that live in the world’s most iconic spaces.

This is for someone who’s looking for a totally different job. You want to work on seriously hard problems along a talented multidisciplinary team. Ready to jump both feet into new problem domains, figure out what needs to be done - and do it.

Here’s a behind-the-scenes of a large piece we did:
https://youtu.be/Y-X82D1dBLc?si=Dj-5casrqoXP9wVy&t=228

The Tech & The Role:

You’ll be a senior voice on a tight team, touching every layer of the stack

  - Systems/Backend: Managing Linux-based distributed systems that coordinate massive arrays of sensors and actuators.
  - Embedded/Firmware: Writing C/C++ for custom PCBs and motor controllers.
  - Languages: Primarily Python, JS, C, and C++.
  - Hard Problems: Real-time constraints, custom networking protocols, and high-reliability systems that have to run 24/7 in public spaces.

  - 10+ years of experience. We need a "tinkerer" who understands math/physics and isn't afraid to poke at hardware.
  - Someone who thrives on "mission-critical" pressure. When a sculpture goes up in a public plaza, it has to work.
  - Mentorship-minded. You’ll help shape the software culture as we grow.

Studio:
https://breakfaststudio.com/

Apply here:
https://theartistbreakfast.com/jobs/jobs-senior-software-eng...

Can't wait to hear from you!

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 roles:

Lead Software Engineer (
https://jobs.lever.co/findigs/1ea92751-1c85-4eb6-84b4-86c529...)

Senior Software Engineer (
https://jobs.lever.co/findigs/3b39616d-223f-4326-a500-f804c3...)

Backend Software Engineer (Mid-Level) (
https://jobs.lever.co/findigs/5e865781-244f-4e4f-b7bd-e09973...)

Competitive Base Salary plus Pre-IPO Equity

401k Matching up to 4%

Unlimited PTO

Lunch in office every day, home office setup stipend, monthly gym stipend

Bubblehouse is a fast-growing custom loyalty platform, tripling the revenue each year. Headquartered in NYC, the entire team is fully remote and spread across the globe. We power loyalty programs for brands like American Girl and Old Spice.

We’re expanding our lean team of extremely experienced developers. Companies are switching from other platforms thanks to the customizations and flexibility that we offer, enabled by our pace and technical excellence, which we intend to keep for years to come.

We run on Golang and use custom data storage on top of local key-value stores, colocating the storage and compute on dedicated hardware servers, and reading data directly from mmap’ed pages of the database. Ever came across HN saying that one can run Twitter on a single machine these days? We’re doing that in production.

Zero lines of React, almost zero third-party dependencies (carefully vetted), every line of JavaScript manually written with respect and understanding of the web platform. We render HTML server-side like it’s 2005.

Looking for:

1. Top to bottom understanding of the software stack, from the modern-ish web platform to CPU caches.

2. Thinking and problem solving outside the box. (We don’t _always_ go for unconventional solutions, but we do it often enough to require a person who can do justice considering the entire problem space at every step.)

3. Demonstrated ability and hunger to learn new things quickly. (Every month we’re doing things we have never done before.)

4. Broad experience across multiple programming paradigms, platforms and software stacks.

5. Demonstrated care for the software craftsmanship (which can take many forms).

6. Great spoken English, and ability to communicate 9am to noon in New York time zone.

We give you a literally fast-paced environment (with features delivered in days) where you need to solve very challenging problems with practical advanced technology, take on entrenched market leaders, and help entrepreneurs across small and large businesses delight their fans.

Send a plain text cover letter to andrey+hiring@bubblehouse.com. Help us see how you stand out. Summarize your experience. Link to 1–5 impressive things you’ve built and proud of, link to where we can see some of your code, include your portfolio/CV, describe the platforms and stacks you’re an expert in. How did you start programming? What are you most passionate about in technology? What are the most interesting or weird things you’ve done? What are your strongest held professional opinions? Please make your email easy to read, we’ll appreciate that.

(If you have applied before, no need to re-apply, we’ll reach out.)

We do movies, ping pong blimps, etc

Senior DevOps Engineer/SRE/Platform Engineer:
https://labs.a24films.com/jobs/devops

UI/UX Developer Styling Genius:
https://labs.a24films.com/jobs/genius

If you email me, mention hn ;)

Odyssey is building the leading financial technology platform for school choice. We help families access funding for tuition, tutors, curriculum, software, and enrichment programs—empowering them with greater educational opportunities.

We’re well-funded, backed by top investors including Andreessen Horowitz (a16z), and we are rapidly scaling.

We’re looking for a full-stack engineer to help build and scale the technology powering our platform. You’ll work across the stack-- architecting efficient backend systems, building intuitive front-end interfaces, and ensuring our platform scales efficiently.

This role is ideal for someone who wants to work on meaningful problems in education & fintech; influence the direction of a fast-growing, venture-backed startup; and collaborate with a passionate team.

Typescript, AWS, Postgres, Next.js, Tailwind, Terraform, Docker.

https://jobs.ashbyhq.com/odyssey

Sesame believes in a future where computers are lifelike - with the ability to see, hear, and collaborate with us in ways that feel natural and human. With this vision, we're designing a new kind of computer, focused on making voice personal agents part of our daily lives. More details from Sequoia:
https://www.sequoiacap.com/article/partnering-with-sesame-a-...

Our team brings together founders from Oculus and Ubiquity6, alongside proven leaders from Meta, Google, and Apple, with deep expertise spanning hardware and software.

Open Roles:
https://jobs.ashbyhq.com/sesame

- ML Engineers

- Product Designers

- Product Managers

- iOS & Android Engineers

- ML Model Serving Engineer

- Embedded OS Architect

- Mechanical Engineer, Product Design

- Embedded Engineers

- Electrical Engineer

- Audio Systems Engineer

Sienna Charles, an ultra luxury travel and lifestyle experiences company, is seeking a full time System Administrator & Support role for internal IT functions. You will help us manage our identity and access management systems, our 30+ cloud-based applications and our in-house tooling. You will take ownership of these systems with an eye towards simplification, automation, scaling and integrating them into seamlessly connected systems. You will help set the direction for our in-house administration interface and mobile app. You must be a problem solver who will articulate a vision for our technical infrastructure and set the technical direction for our company.

We're a small, globally distributed team, so we are looking for a self-motivated senior administrator who can identify and execute high value and high impact work.

You’ll be coordinating directly with the owner of the company - no bureaucracy or middlemen.

This role is open to remote work, but we also have office space available in NYC for on-site work (preferred).

Some parts of our stack: Okta, 1Password, Google Workspace Slack, Zendesk, HubSpot, Monday.com, Google Meet, Zapier, Loom, Fathom, BambooHR, Dropbox, Figma

Full job description:
https://docs.google.com/document/d/1xyct1dSsMMTl1BdQg-1MXa2X...

How to apply:
https://forms.monday.com/forms/26e54f3009ba37ccfc6f6d7b5ddcf...

Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. We strive to design and build step-function improvements over existing blockchain solutions. After raising $225M in series A funding, led by Paradigm, we are growing our team.

Technical Program Manager:
https://jobs.ashbyhq.com/category-labs/bdfe89a6-83f6-4ab3-b6...

Senior SWE, Compiler:
https://jobs.ashbyhq.com/category-labs/e5c34899-cea1-4d25-be...

If you or a loved one has ever suffered from confusing/egregious medical bills or insurance communications, this is your chance to give the power back to others in a similar situation.

Our mission is to demystify health insurance, healthcare and medical billing. By utilizing cutting-edge technology and advanced data analytics, we deliver personalized recommendations on how to save money, maximize use of plan benefits, stay on top of reimbursements and avoid erroneous or inflated medical bills.

Currently open roles:

- Software Engineer, Fullstack ($140-190k + equity)

- Software Engineer, Browser Automation ($140-190k + equity)

- Software Engineer, Backend/Data ($140-190k + equity)

- Product Manager, Data ($140-190k + equity)

- Customer and Operations Success Associate ($60-90k + equity)

- Sales/BDR (variable comp + equity)

Drop us an email to hn ~at~ sheerhealth.com if these sound interesting!