Astral At Astral, our mission is to make the Python ecosystem more productive by building next-generation developer tools — tools that enable developers to ship great software, faster. To start, we've built Ruff, an extremely fast Python linter and formatter; and uv, a comprehensive Python package manager — two of the fastest-growing developer tools ever. Next, we're continuing to push the future of Python with a state-of-the-art type checker — and building out our first hosted services. Our early team includes the authors of ripgrep, bat, hyperfine, and maturin; early, core contributors to Biome and Prefect; and multiple CPython core developers — all building at the intersection of Rust and Python. The Role We're hiring backend and infrastructure engineers to build our first hosted product . This is a full-stack, greenfield effort to build an entirely new product, atop and integrated with Astral's open source tooling. You'll be part of a small team, shipping alongside our CEO and iterating rapidly with world-class design partners. In this role, you would significantly influence the technical stack and technical direction of the product, and could end up owning any (or even all) of the following: Designing (and productionizing) our cloud infrastructure stack (e.g., cloud providers, hosting, deployment). Deep focus on cloud infrastructure scalability and efficiently. Building out our deployment system, including monitoring, metrics, and observability. Own incident response and triage. Designing (and productionizing) our cloud storage and content serving strategies. Defining and implementing our database schema and data pipelines; optimizing database queries. Designing (and productionizing) our backend API and data models. Great candidates will have demonstrated, deep experience with backend Python development and building performant, robust cloud infrastructure at scale. Strong familiarity with the Python ecosystem is a bonus. Great candidates will also be able to work across the stack where needed. There will be a lot of "startup engineering": figuring out how to move quickly while investing heavily in the areas and decisions that really matter. The Team We're not only remote, but highly distributed. We hire from Pacific Time (e.g., San Francisco, USA) to Central European Time (e.g., Munich, Germany), and get together twice annually for week-long, in-person on-sites. We pay competitively (salary and equity) and offer comprehensive benefits (healthcare and more). Our work is highly collaborative, but as is common in open source, much of that collaboration takes place asynchronously (in Discord, or GitHub, or Notion). We minimize meetings, and maximize time spent working in code. We're a small, high-trust team. We strive to ship excellent software, at a fast pace. We have a lot of fun doing it. (See: Our Values.) Our Process Our hiring process is entirely remote and does not include any live coding segments. While the process may vary from candidate to candidate, it generally consists of three phases, each designed to mimic the kind of engagement and interactions you'd have as a member of the team: A take-home project, where we ask you to build out a tool based on a pre-defined specification. A presentation, where we ask you to present on some of your own work, and have the kind of technical conversation you'd have as a member of the team, grounded in something that you know well. A conversation with our founder, Charlie, where we discuss our company culture, your own goals, and how they map to the role. Along the way, we'll talk through your background and interests to determine whether Astral is a good fit for your career goals.

About Boon Boon is the professional AI platform built specifically for construction. Founded in the San Francisco Bay Area in 2023 by product and engineering leaders from Samsara, Apple, Google and DoorDash. Boon is backed by leading Silicon Valley venture capitalists. Our AI agents embed directly into existing workflows, from preconstruction estimating to bid management. They automate the repetitive tasks that drain time and margins while surfacing the insights leaders need to make faster and more confident decisions. The result is measurable impact. Teams move faster, bids are submitted sooner, win rates increase, and costs are reduced. Boon enables construction companies to build more, generate more revenue, and grow with confidence. About the Role As a Technical Lead, Software Engineer at Boon, you'll build the product that brings our AI capabilities to construction teams. You'll work across core product features and customer integrations, taking models built by our AI team and turning them into polished experiences that solve real customer problems. Our stack is Ruby on Rails on the backend, React on the frontend, with Python microservices supporting the platform. A significant part of this role is owning customer integrations end-to-end. You'll be the technical point of contact working alongside product managers and solutions engineers to understand customer systems, design integration approaches, and ship solutions. Construction software is often legacy, Windows-only, and lacks modern APIs, so creative problem-solving is essential. You might find yourself building a desktop app to sync files from a customer's local system, or inventing other workarounds to bridge the gap between old and new. This is a hands-on technical leadership role. You'll write code regularly while also driving architecture decisions, coordinating across teams, and mentoring other engineers. You'll work closely with other technical leads and an established engineering team to build a product that delivers real value to construction companies. In this role, you will: Build core product features end-to-end, from backend APIs to frontend UI. Own customer integrations from initial technical discovery through deployment, working alongside product managers and solutions engineers. Serve as the technical point of contact for customers, understanding their systems and requirements while designing integration approaches. Minimum requirements for the role: 7+ years of experience in software engineering with full-stack experience. Strong experience with at least one or two end-to-end full-stack frameworks. You don't need to know Rails and React specifically, but you should be able to ramp up quickly. Demonstrated ability to solve complex, ambiguous problems creatively. We care more about your problem-solving approach than specific technology experience. Experience owning projects end-to-end, from scoping through deployment. Strong collaboration and communication skills. You'll work closely with customers, product managers, and fellow engineers. Experience working with AI coding tools. Our interview process will include using these tools, and you'll use them daily on the job. Ability to learn new systems and technologies quickly, including unfamiliar customer software and integration patterns. Compensation At Boon, we want to attract and retain the best employees and compensate them in a way that appropriately and fairly values their individual contribution to the company. With that in mind, we carefully consider a number of factors to determine the appropriate starting pay for an employee, including their primary work location and an assessment of a candidate’s skills and experience, as well as market demands and internal parity. This estimate can vary based on the above mentioned factors, so the actual starting annual base salary may be above or below this range. A Boon employee may be eligible for additional forms of compensation, depending on their role, including sales incentives, discretionary bonuses, and/or equity in the company. Boon Is An Equal Opportunity Employer As an equal-opportunity employer, Boon is committed to providing employment opportunities to all individuals. All applicants for positions at Boon will be treated without regard to race, color, ethnicity, religion, sex, gender, gender identity and expression, sexual orientation, national origin, disability, age, marital status, veteran status, pregnancy, or any other basis prohibited by applicable law.

About Kiddom Kiddom is a groundbreaking educational platform that promotes student equity and growth by uniting high-quality instructional materials with dynamic digital learning. Through unparalleled curriculum management functionality, Kiddom empowers schools and districts to take ownership of their curriculum – resulting in learning experiences tailored to meet the unique needs and goals of local communities. Kiddom’s high-quality curriculum is layered with robust teacher and leader data insights to drive the continuous improvement of instructional decisions, school/district programming, and professional learning. Want to join Kiddom, but don't see your dream job posted? We'd like to hear from you! Kiddom builds technology enabling teachers and learners to unlock their full potential. Education technology is increasingly fragmented across various applications, undermining utility and causing cognitive overload, frustration, and ultimately, rejection. Kiddom is building a collaborative learning platform for educators to integrate content, curriculum, and analytics in one place. Help us understand what we're missing and why we need you. Describe what you want to do, why you want to do it, and what you've got to show for it. Feel free to include any relevant work (portfolio, project, writing sample etc.) Salary range is dependent on geographic location, prior experience, seniority, and demonstrated role related ability during the interview process. What we offer Full time permanent employees are eligible for the following benefits from their first day of employment: * Competitive salary * Meaningful equity * Health insurance benefits: medical (various PPO/HMO/HSA plans), dental, vision, disability and life insurance * One Medical membership (in participating locations) * Flexible vacation time policy (subject to internal approval). Average use 4 weeks off per year. * 10 paid sick days per year (pro rated depending on start date) * Paid holidays * Paid bereavement leave * Paid family leave after birth/adoption. Minimum of 16 paid weeks for birthing parents, 10 weeks for caretaker parents. Meant to supplement benefits offered by State. * Commuter and FSA plans Equal Employment Opportunity Policy Kiddom is committed to providing equal employment opportunities to all employees and applicants without regard to race, religion, color, gender, sexual orientation, transgender status, national origin, citizenship status, uniform service member status, pregnancy, age, genetic information, disability, or any other protected status in accordance with all applicable federal, state, and local laws.

Company Description At Snarkify, we are passionately driven by our mission to scale zero-knowledge proofs (ZKPs) for a decentralized future. We empower developers by providing robust infrastructure and user-friendly tools, enabling them to effectively build, deploy, and scale ZKP applications. Our operations are steered by a stellar founding team comprising two Ph.D. holders and a Master holder. Our founders carry exceptional expertise gained from renowned organizations such as the Ethereum Foundation, Facebook, Amazon, and Dropbox. Through the application of folding schemes, proof aggregation, and GPU acceleration, we're pushing the scalability of proof systems to unprecedented levels. Through this unwavering commitment, we are shaping a future that promises enhanced security, privacy, and decentralization. Job Description Snarkify is seeking an experienced and highly skilled Senior GPU Performance Engineer to join our team and play a pivotal role in advancing the state-of-the-art in Zero-Knowledge Proof (ZKP) acceleration. As a key member of our team, you will have the unique opportunity to shape the future of modern cryptography and decentralized applications by optimizing GPU-based solutions for ZKP applications. In this role, you will collaborate with our engineering team to identify performance bottlenecks and design innovative GPU-based algorithms and data structures that push the boundaries of ZKP acceleration. Your expertise in GPU computing, performance optimization, and parallel programming will be instrumental in driving the development of high-performance, energy-efficient solutions that redefine the capabilities of ZKPs and lay the foundation for a truly decentralized future. Responsibilities Design, develop, and optimize GPU-based algorithms and data structures to accelerate ZKP proof systems and related computations. Collaborate with the engineering team to identify performance bottlenecks and propose innovative solutions to improve overall system efficiency. Develop and maintain high-quality, well-documented code that adheres to best practices for GPU programming. Analyze and optimize performance across a wide range of GPU architectures, ensuring maximum performance and compatibility. Stay up-to-date with the latest advancements in GPU technology, programming techniques, and industry best practices. Contribute to the creation of technical resources, including whitepapers, tutorials, and presentations, to share knowledge and promote our GPU-based solutions. Mentor junior engineers and provide guidance on GPU-related topics and performance optimization techniques. Qualifications Benefits Competitive base salary with founding member equity. The opportunity to build the next-generation ZK computing platform. Immersion in a team of top-notch global blockchain engineers. A flexible and innovative remote work environment. Room for continuous growth and development in the ZK field.