Perpay | Senior Full Stack/Backend Engineer + Engineering Manager | Onsite in Philadelphia, Full-Time

Perpay, a certified B-Corp, is the most meaningful growth-stage startup in Philadelphia. We’ve spent the past decade growing from an early idea to achieving strong product market fit, and becoming one of the fastest-growing fintechs in the country as we march toward half a billion in revenue. Today, more than 500,000 customers rely on Perpay, and we are driven by this mission that meaningfully improves the financial stability of everyday Americans. We’re in a special moment of building, scaling, and deepening our impact, and are eager to find teammates that want to join us on the journey.

Our venture partners include First Round Capital and L Catterton.

We're looking for:

- A few Senior Full-stack or Backend Engineers across our 3 product engineering teams. We highly value product-mindset, experience building production web apps for real users, and ability to coach and support more junior engineers.

- A technically hands-on Engineering Manager. Ideally, you have at least a year or two of experience leading people and being accountable for a team's execution, roadmap, and performance. You would be the fourth "line manager" on our team, and so there's ample opportunity to grab org-wide initiatives that are interesting and impactful.

Our stack includes AWS, Postgres, Python/Django, React/Redux/Typescript, Datadog

Some other company notes / benefits: NYC-level total cash comp, meaningful equity, open PTO policy, full health/dental/vision with solid buy-up option, remote weeks around major holidays, high quality catered lunch 3 days/wk, 4% 401k match, cell phone plan, gym subsidy, and some student loan repayment match.

Check out the full JDs here https://perpay.com/careers#open-roles , and feel free to reach out directly! karl at perpay dot com

Second Nature | Software Engineer, Engineering Manager, Director of Engineering | REMOTE (US) | Full-time

Second Nature (<https://secondnature.com>) is redefining professional property management with fully managed Resident Benefits Packages. We're a Resident Experience Platform helping 1,000+ property management companies automate resident onboarding, credit-building, renters insurance, utilities, and other resident services—creating "Triple Win" experiences for residents, property managers, and investors.

We're the only 5-time national NARPM vendor of the year!

Tech Stack: TypeScript, React, Next.js, NestJS, PostgreSQL, Kubernetes, Terraform, AWS, Python. CI/CD with GitHub Actions/CircleCI. Domain-driven design and event-driven architecture.

Culture: We move fast ("Pirate Ship, Not a Cruise Ship"), take extreme ownership, and focus on outcomes. Currently exploring AI integration across our workflows.

Benefits: 100% remote (US), medical/dental/vision, 401K, open PTO, equity.

Open Roles:

Director of Engineering ($200K-$230K) - Lead cross-functional engineering teams building world-class software at scale. Shape technical strategy and grow our engineering org. <https://www.secondnature.com/careers?ashby_jid=704ec05c-96ce...>

Engineering Manager ($180K-$200K) - Player/coach role: hands-on coding + people leadership. Lead 5-10 engineers, drive architecture decisions, ship production code. Experience with TypeScript, React/Next.js, NestJS, PostgreSQL. <https://www.secondnature.com/careers?ashby_jid=6ac49e4d-9541...>

Software Engineer - Full-stack roles across our platform. JavaScript/TypeScript, Python, SQL, CI/CD experience. <https://www.secondnature.com/careers?ashby_jid=cc1a9853-779e...>

Datadog | Software Engineers | ONSITE (Boston, Lisbon, Madrid, NYC, Paris, Tel Aviv) | Full-time

Datadog is a monitoring, tracing, logs system, and more, for your infrastructure and services. We build our own tsdb, event store [1][2], distributed tracing tools, cutting edge visualizations, and more. We love shipping great experiences for customers just like us and are growing fast! We write a lot of Go, Java, Python, Typescript (with React), and a bit of other languages. We run on k8s, and are multi-region and multi-cloud.

We're looking for people who can build systems at scale as we process trillions of events per day. Let us know if that's you!

https://dtdg.co/hnwhoshiring

[1] https://www.datadoghq.com/blog/engineering/introducing-husky

[2] https://www.datadoghq.com/blog/engineering/husky-deep-dive

Shorebird | Mid-Senior Systems/Runtime (C++) Engineer| REMOTE (North America) | Full-time | $160-230k + equity + benefits | https://shorebird.dev

Flutter/Shorebird founder here. Flutter is used by millions of devs (and nearly ⅓ of free apps submitted to AppStore), but is missing services for businesses. We offer Flutter-related SAAS used by 1000s businesses globally, on track to profitability early 2026.

As part of our over-the-air updates “code push” product, we’ve built a custom compiler and runtime for the Dart language, primarily written by me (founder/CEO). Now that we have thousands of customers, I have many other responsibilities and need to bring on a fulltime engineer (you!) to take over primary responsibility for all of our C++ code (Dart & Flutter forks, custom runtime, compiler, etc.) and evolve it further than I could alone. Together, you and I will add obfuscation, improve our interpreter, possibly re-write method dispatch, etc. You don’t need to be a compiler/runtime expert. You do need to be capable of working on large open source projects, be comfortable with C++, want to work at a startup, work well independently (we’re remote) and want to learn and work on lots of different areas of code.

If you’ve contributed at least a little to WebKit, Godot, Firefox, or any other large open source project, are compiler/runtime curious, and want to work at a growing startup, you will likely find this role extremely rewarding.

We’re a small, senior team, making something people want. Tech: GCP, Cloudflare, React, Dart, C++, Rust. Shorebird operates almost entirely in the public over Discord. https://discord.gg/shorebird

https://shorebird.dev/jobs

Bidaya AI | Senior Software Engineer (Full Stack) | Calgary, Canada | HYBRID | Full-time | Up to $140k CAD + Generous Equity

We're an early-stage (pre-seed) VC-backed startup automating RFP proposals for the AEC (Architecture, Engineering, Construction) industry.

We are building an agentic AI platform that embeds directly into Microsoft Word, helping firms find and win more work, while serving as their knowledge management hub for all business development.

You would be the first full-time engineering hire working directly with the founders (I'm the technical co-founder). We need someone who can ship production code across the whole stack.

The Stack: - Frontend: Next.js, React - Backend: FastAPI (Python), Temporal

Hard problems you will solve:

Deep Word Integration: Building a high-performance, "Cursor-like" experience within the constraints of Office.js.

Agentic Workflows: Orchestrating AI agents that can read complex government requirements, reason about compliance, and generate winning output autonomously.

Evolving Knowledge Graph: Architecting a library system that doesn't just store files, but learns from project history and feedback loops.

If you want a chance to work on a hard problem, in an exciting space, with a strong team that has validated the market and de-risked the business, with major upside, let's talk!

To apply, email me directly: majd [at] bidaya.ai or [here](https://app.dover.com/apply/bidaya/d5f29bbb-9c67-4c4e-82bf-5...) Mention HN in the subject.

EagleSight.ai | Forward Deployed Engineers (Fullstack & ML) | Las Vegas, NV | ONSITE | Full-time

EagleSight builds AI-powered vision agents for casino surveillance. We turn existing cameras into real-time detection systems that catch cheating and dealer errors as they happen. We're deployed in major Las Vegas casinos and growing.

We're hiring two Forward Deployed Engineers:

Fullstack – Own the product experience and on-prem deployments. You'll build and maintain our dashboard (React), backend services (Python/Node), and deploy full-stack systems on local GPU servers. 3+ years experience, strong with Python, TypeScript, Docker, Linux.

Machine Learning – Own our real-time vision pipelines end-to-end. Train, tune, and deploy deep learning models at client sites using PyTorch, ONNX, TensorRT. 2-3 years ML experience, comfortable with Linux, Docker, and shipping models as services.

These are field roles. You'll deploy and debug systems on-site at casinos and hotels. Startup mindset required – we're a small team moving fast.

Tech: Python, React, PyTorch, Docker, Linux, on-prem GPU infrastructure

Apply: https://eaglesight.ai/careers

Tandem Health | Software Engineers | On-site in Stockholm, Sweden | Full time

At Tandem Health we're building a clinician copilot to allow clinicians to focus on care rather than administration. We’re building, launching and iterating quickly, and are already rolling out across some of the largest care chains across Europe, including most of the NHS.

Our core product listens in to the patient-clinician encounter to generate medical records, allowing clinicians to save 5-10 minutes per patient. No longer do clinicians have to catch up on administration after hours. Some even tell us that their partners notice they're much more relaxed after starting to use our product, and we couldn't be happier :)

We’re expanding our Stockholm team with exceptional engineers! We use Python (backend), TypeScript/React (frontend) and C# (Windows app) and our infrastructure runs on Kubernetes in Azure.

Even if we don’t have a role out your specific skill set, we’d love to talk! Our tech team is small but growing and you’ll have an outsized impact on an important problem.

More info at https://www.tandemhealth.ai/recruitment

Feel free to reach out to john.moberg@tandemhealth.ai if you have any questions!

PrairieLearn (Remote US) — Full-Stack Software Engineer — TypeScript / Node / Postgres / AI

PrairieLearn (https://www.prairielearn.com) is an open-source assessment platform used by universities across the US (Berkeley, Princeton, Michigan, Illinois, and others). We power mastery-based learning and large-scale exams.

We’re a small, profitable, early-stage company (bootstrapped, no VC) and we’re hiring full-stack engineers to help us continue to grow. You’ll work across the stack and have meaningful ownership from day one.

We’re also developing AI tooling in the product, including LLM agents to help instructors create content, and vision-language models to help grade student work. This is practical, user-facing AI work with real-world impact — not a research sandbox.

Tech we use: Node.js / TypeScript backend, Postgres, AWS, React. PrairieLearn is open core: https://github.com/PrairieLearn/PrairieLearn

Details:

- Location: Remote (US only)

- Salary: $100k+ depending on experience

- Benefits: Stock options, unlimited PTO, flexible hours

- Role: Full-time. (We’re not able to sponsor visas at this time.)

If this sounds interesting, please email jobs@prairielearn.com. We’d love to talk.

Official job posting: https://www.prairielearn.com/jobs

Precision | New York City (Optional Remote) | Founder seeking first technical teammate

I’m a solo founder in NYC building Precision — a platform that automates commercial real-estate underwriting and valuation. The proof-of-concept is fully working and has been demoed to institutional CRE professionals with strong feedback. I come from institutional CRE investment banking and have a solid technical foundation (built the entire PoC myself).

I’m looking for a strong engineer interested in joining early to help take the product from proof of concept → production: architecture, database design, scaling, multi-tenant security, and integrating AI for document abstraction.

Stack: React, Node/Express, MongoDB (MERN).

If this sounds interesting, reply or email me: kylemarsh49 [at] gmail [dot] com

Happy to share the demo and discuss what a technical partnership could look like.

Artificial Analysis | https://artificialanalysis.ai | Full Stack Engineer, ML Engineer, Member of Technical Staff | Onsite in San Francisco or in Australia/New Zealand | Competitive Salary + Equity

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 20 and have backing from investors including Nat Friedman, Daniel Gross & Andrew Ng.

We are hiring for four roles:

1. Full Stack Engineer: Full Stack Engineer to support our benchmarking of AI and with communicating these benchmarks to our users. Proficiency in Typescript & Python required. Familiarity with LLM APIs preferred. Tech stack: Javascript/Typescript, Node.js, React/Next.js, Python.

2. ML Engineer: ML Engineer to support our benchmarking and evaluation of AI software stack. You will design and run benchmarks and evaluations of different AI models. Strong analytical skills and proficiency in Python required.

3. Member of Technical Staff: You will design evaluations of different AI models and work to translate technical insights to analysis that helps companies navigate AI.

Apply at hiring (-at-) artificialanalysis.ai with your resume, github and dot points on relevant experience (including anything you've built). Add | HackerNews to email subject line.

Pinetree | Remote (North America, GMT-8–GMT-5) | Full-time | Salary + Equity

We’re hiring our third team member, a full-stack engineer, to work directly with the founders across the Pinetree codebase. If you were here today, you’d be shipping notifications, building out the creator studio with analytics and video management tooling, and improving our Farcaster mini app experience and onchain features like direct payments to creators.

Pinetree is building the best onchain platform for video creators: a crypto-native alternative to ad-driven video platforms that gives creators real ownership over distribution, monetization, and their content. We’re looking for someone highly autonomous who brings solutions to complex problems and wants meaningful product and company ownership.

You should have experience writing and deploying production software in TypeScript, ideally on a small (<50 person) team or other startup environment, and be comfortable working across the stack (React / React Native / Next.js, Node, Postgres). Crypto or social product experience is a plus.

Stack: TypeScript, React, React Native, Next.js, Node, Postgres

Comp: $120–200k base, 1–4% equity, health/dental/vision, unlimited PTO, remote-first, $2,500 home office budget.

Reach out to giu@pinetree.so with a resume or links to work you’re proud of.

Comulate | Senior Engineer (3+ YoE) | ONSITE in San Francisco, CA

We're building automation software for the $7T insurance industry, accelerated by AI. Seed stage in terms of headcount (~ 20 people) but Series B in terms of business traction (+ cash-flow positive). We've intentionally stayed under the radar.

- Product has caused customers to literally cry tears of joy

- Experienced eng team from Airbnb / Brex / LiveRamp

- Stack: TS, Postgres, React, GraphQL, and Next.js

Silkline | Onsite, Seattle (5 days/week) | Full-time | Salary+Equity We need help! and are looking to hire multiple full-stack or frontend engineers at Silkline.

Today, the way modern hardware supply chains work is like fax woke up in 2025 - spreadsheets, email, PDFs, and a lot of sadness. We are fixing this antiquated system and building the AI-first platform to power the future of supply chains. Initially, we are focusing on the rising defense, space, and nuclear sectors.

Over the last year, we have grown considerably (5x'ed customer count), just announced our Seed round, and brought on some massive logos in the industry. Join me and our deeply customer and product-oriented team, which has been shipping incredibly fast.

Stack: Typescript, React, Next.js, Hasura, Trigger.dev, AWS, Pulumi, Elbow grease

Reach out to brent@silkline.ai or apply: https://jobs.gem.com/silkline/am9icG9zdDrLwsEQTKKa02Ut_F9kgz...

RINSE | REMOTE or San Francisco, Los Angeles, Chicago, Boston, New York, New Jersey, Seattle, Austin, Dallas, Toronto, or Washington DC | Software Engineer | Full-Time | https://www.rinse.com

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.

Search term bingo: Logistics, Django, Python, Optimization, React, React Native, Postgres, Mobile Engineer, Automation, Delivery

https://www.rinse.com/careers/software-engineer/

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:

---

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).

---

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

Foundation Source | Remote (US, Canada) | Full-time We're expanding our team and looking for passionate individuals to join us in building innovative solutions for philanthropy in the DAF team (we provide the technology that runs the Charityvest DAF). Our current openings include:

Senior Software Engineer, Back-end, DAFs: Design and implement core products for our Donor-Advised Fund (DAF) offerings, using a modern fully serverless event-driven architecture in AWS with TypeScript and Postgres.

Senior Software Engineer, Front-end, DAFs: Craft exceptional, high-performing user interfaces for our DAF platform, using modern React 18+ and Next.js 14+ features.

If you're passionate about fintech and making a meaningful impact in the world of charitable giving, we'd love to hear from you.

Feel free to email me your CV and I'd be happy to share more details: edmundo+hn [at] charityvest [dot] org

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.

Electric.ai | Senior Frontend Engineer | Remote (South&Latin America) | Full-time | $60,000 - $85,000

We're a company based in the US focusing on helping small and medium businesses be on top of their IT with the help of software and automation, even if they have limited IT & security knowledge.

We're looking for a senior frontend engineer, we're react shop with a standard stack. We're a mix of US and South America based engineers on the team.

email: cmVtaS5jYXJ0b25AZWxlY3RyaWMuYWk=

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