Full-Stack Software Engineer at Blockstream | HQ

Blockstream was established in 2014 by Dr. Adam Back and a dedicated team of cryptographers and engineers who are deeply passionate about Bitcoin and its transformative potential for the financial landscape. Our mission is to create foundational Bitcoin infrastructure, and we have swiftly evolved into one of the foremost technology leaders in the sector.At B…

Our Mission:Join us as a Full Stack Product Engineer at AthenaHQ, where we empower global brands through our cutting-edge AI Search platform.We seek an engineer who thrives on product ownership.Work with state-of-the-art technologies, engage directly with customers, and play a key role in shaping our technical architecture and tooling choices.Your day will involve iterating based on customer feedback, scoping new product features, and proactively addressing customer challenges.Technical Stack:Frontend: Next.js App Router, React 19, Motion, Tailwind CSS, and Radix PrimitivesBackend: Node.js, Temporal, Kubernetes, PostgreSQL, OLAPKey Outcomes:Deliver full-stack product features utilizing Next.js and TypeScriptCraft clean and effective database schemas and queriesEstablish durable Temporal workflows for intricate business logicCreate responsive and accessible UI componentsPrioritize performance and user experienceInfluence architectural and technology decisionsCore Competencies:Proficient in Next.js and TypeScriptExperience in building and shipping production applicationsFamiliar with contemporary CSS/UI frameworksUnderstanding of distributed systemsDemonstrates humility while taking pride in workBonus Qualifications:Experience with TemporalFamiliarity with marketing technology and content management systems (CMS)

Join Condor Software as a Full-Stack Platform EngineerAt Condor, we are revolutionizing the financial infrastructure that supports clinical development. With billions invested annually in discovering and developing new therapies, we strive to connect clinical operations and finance into a cohesive system. By integrating real-time financial intelligence, we empower R&D and finance leaders with the tools they need to make informed, high-stakes decisions.We are an AI-driven, pharma-native infrastructure provider, scaling industry standards in collaboration with top-tier partners. Our platform facilitates prediction, control, and execution in the most complex R&D environments worldwide.The Importance of Your RoleHaving established ourselves as a trusted partner for enterprise teams, we are now focused on the challenging task of scaling our platform to meet increasing demands. As a rapidly growing company, backed by prominent investors like Felicis and 645 Ventures, this is a unique opportunity to contribute to the foundational infrastructure that will redefine how therapies reach patients.Your ResponsibilitiesAs a Full-Stack Platform Engineer, you will be pivotal in building and scaling the core platform that supports the financial intelligence infrastructure relied upon by leading biopharma companies. This role encompasses critical engineering tasks at the intersection of backend systems, cloud infrastructure, and intelligent automation, with a strong emphasis on reliability and scalability.Your primary focus will be on backend architecture, where you'll design and implement services that drive complex financial and operational workflows. You'll be instrumental in shaping data flow, workflow orchestration, and enabling emerging AI-driven capabilities. This role goes beyond simple integration; you'll be crafting robust primitives that support other teams as our product and customer base expand.Working as a core member of a cross-functional product team, you will closely collaborate with product managers, designers, quality engineers, and data specialists to transition features from concept to production. While backend expertise is crucial, you will also engage across the stack to ensure the platform's capabilities are effectively leveraged.

About Loop Loop is a pioneering data platform revolutionizing the global supply chain. In an industry plagued by disorganized data trapped in PDFs, emails, and outdated systems, we harness the power of AI to transform this chaos into a reliable 'source of truth' that streamlines payments and audits for Fortune 100 companies. Our mission is to create the financial nervous system of a $100 trillion physical economy, ensuring that freight moves efficiently and carriers are compensated immediately. Supported by industry-leading investors such as Founders Fund, Index Ventures, and 8VC, we are on an aggressive growth trajectory. We seek engineers eager to deploy innovative AI solutions that drive the physical economy forward. About You As a Full-Stack Software Engineer, you will collaborate closely with founders and clients to tackle logistics billing and payment challenges. Your contributions will be vital in shaping the product and delivering features that have a real impact on our customers' experiences. You will encounter and resolve complex technical challenges, benefiting from the support and insights of our team. Your influence will help define Loop's culture and growth trajectory. Responsibilities Collaborate across teams (product, design, sales) to gather requirements and deliver thoughtful solutions. Produce high-quality, extensible code. Participate in code reviews to uphold exceptional engineering standards. Facilitate discussions and document processes to achieve optimal technical designs. Engage with various components, spanning frontend to backend and infrastructure. Utilize AI technologies like Cursor, Codex, and Claude to enhance software development and advocate for the integration of AI tools to boost productivity across the organization. Encourage best practices and disseminate technical knowledge within the team. Contribute to Loop's growth through constructive feedback on our products, processes, and culture. Qualifications Willingness to work in the San Francisco or Chicago office three days per week. At least two years of software engineering experience. Proficiency in TypeScript and familiarity with tools such as GraphQL, Relay, React, and Node.js. Experience in early-stage companies, where you have managed end-to-end product delivery and adapted to various roles.

About Owner.comOwner is revolutionizing the growth strategy for local restaurants through cutting-edge AI technology.Our AI-driven platform consistently enhances SEO, marketing, and online ordering processes, facilitating increased first-party orders. Unlike conventional software solutions that burden small business owners with complex systems, Owner offers a reliable, expert-driven solution.Think of Owner as your dedicated team of engineers and marketers, empowering independent restaurants to compete with large chains.Our VisionWe are committed to helping independent restaurants thrive online. However, our mission extends beyond the culinary industry; many local businesses face similar challenges. Large tech corporations are siphoning their customers and profits, making survival increasingly difficult.Once we perfect our approach for restaurants, we aim to extend our solutions to all types of local businesses.In our envisioned future, millions of local business owners will leverage our technology to excel in the digital era.Read our Series C memo here →Our AchievementsSince our inception in 2020, we have generated tens of millions in revenue and processed over half a billion dollars in online orders. Remarkably, 1 in 5 Americans has used an Owner.com website.We take pride in having assisted over 20,000 restaurant owners, saving them nearly $200 million in fees.Join Our TeamOur team is composed of top-tier talent from leading SMB software companies, including Shopify, HubSpot, DoorDash, ServiceTitan, Rappi, Faire, and Stripe, now numbering in the low hundreds. We anticipate scaling rapidly in 2026 to accommodate our customer growth.Work EnvironmentAs a remote-first organization, Owner is headquartered in San Francisco, with a sales hub in Toronto. While most of our team works remotely across the globe, certain roles may prioritize in-person collaboration. Please refer to the role description and consult your recruiter for specific location details.

Join Lapel, where we prioritize customer hospitality and aim to revolutionize the way businesses engage with their customers!At Lapel, we are dedicated to developing cutting-edge data infrastructure and tools that empower customer-facing teams to deeply understand their clients and act on these insights effectively throughout the customer journey. Our mission is to ensure that every interaction feels personal by bridging the gap between intention and experience.This is a challenging opportunity that encompasses data infrastructure, AI, and systems design, all aimed at enhancing how software companies serve their users. We define this as 'hospitality at scale'.With significant backing from top-tier investors, we are already collaborating with an impressive roster of clients, ranging from dynamic startups to established enterprises. We look forward to sharing more about our journey when we connect.What You'll DoDevelop, deploy, and enhance software features across the entire stack.Collaborate closely with founders, designers, and clients to identify and implement technical solutions.Take ownership of features from conception through deployment and iteration.Design and implement scalable APIs, services, and integrations.Translate complex technical requirements into efficient and maintainable solutions.Develop both frontend and backend components as required.Continuously enhance code quality, system performance, and reliability.Contribute to architectural decisions and engineering best practices.Write clean, maintainable code and elevate the technical standards of our team.Our Technology StackOur complete system is built using TypeScript within a single monorepo.Frontend: React, Vite, and Tailwind;Backend: Node.js and Postgres;Orchestration: Temporal and Pulsar.We prioritize rapid shipping and strive to create a developer-friendly environment that encourages prototyping, experimentation, and swift production of ideas.You'll Excel in This Role If YouPossess 3+ years of experience in building and delivering software within a product-focused environment.

About NudgeAt Nudge, we are dedicated to pioneering innovative technology that interfaces with the brain to enhance the quality of life for individuals. Our current focus is on developing a non-invasive, ultrasound-based device capable of stimulating and imaging the brain with exceptional resolution and depth. This initiative encompasses a comprehensive approach that integrates advanced hardware, software, and research capabilities, aiming to create products that can positively impact millions — and ultimately billions — of lives.To achieve our ambitious goals, we are committed to forming world-class teams in every aspect of our work. We seek talented individuals who excel in their fields, value the pursuit of challenging objectives, and deliver results with unwavering dedication. We expect the highest standards of rigor and integrity from one another.About the RoleAs a Full Stack Software Engineer at Nudge, you will have the opportunity to:Design and develop software solutions, ranging from database migrations to refined front-end features.Create tools that enhance the efficiency of engineers and neuroscientists.Collaborate closely with team members to identify challenges and deliver swift solutions.Take ownership of projects through every phase: design, implementation, testing, and deployment.Address a diverse set of challenges, from data pipelines to internal systems.About YouWe are in search of engineers at all experience levels, ideally with a minimum of 3 years in the industry. Regardless of your experience level, you should possess:A strong foundation in engineering and physics principles.Experience in full-stack web development (Python, Typescript, etc.).Experience in infrastructure engineering and site reliability (Kubernetes, AWS, Terraform, etc.).A degree in Computer Science or a related engineering discipline.A proven track record of successfully delivering high-impact projects and effectively responding to feedback.A commitment to high integrity in all professional interactions.

About the RoleWe are looking for a passionate Full-Stack Software Engineer to join our dynamic team at Replo. Your primary focus will be on product engineering and delivering innovative features that enhance user experience.Key ResponsibilitiesAs a Full-Stack Engineer, you will architect and implement product features using Typescript, React, and Node. Your work will involve:Developing workflows that design, build, and optimize online shops.Creating and maintaining product and payment processing infrastructure.Launching analytics infrastructure on Clickhouse and Kafka that handles billions of events monthly.Taking ownership of the user onboarding process from start to finish.Ideal Candidate ProfileWilling to work in-office 3-4 days a week in San Francisco.Proficient in Typescript, React, and Node.Utilizes tools like Cursor, Windsurf, or GPT for enhanced productivity.Experienced in building products from the ground up with real users and generating revenue.Capable of working independently without the need for product/design input.Has a strong bias for action and is committed to shipping products quickly.Possesses a product and customer-centric mindset.Experienced with deployment and maintenance challenges and has well-formed opinions on product development.Values clean, maintainable code and thorough documentation.Comfortable navigating ambiguity and defining software architecture patterns to address customer pain points.Bonus QualificationsHolds a degree in Computer Science or a related STEM field.Has entrepreneurial experience or has previously started a company.Enjoys participating in hackathons.Has experience working in early-stage startups (Series A or earlier).Has not invested excessive time preparing for interviews on platforms like Leetcode.Possesses an eye for design, with experience in product design tools like Figma.

About HappyRobotHappyRobot is pioneering the AI-native operating system tailored for the real economy, seamlessly bridging the gap between intelligence and actionable outcomes. By harnessing real-time data, specialized AI agents, and a central orchestrating intelligence, we empower enterprises to manage intricate, mission-critical operations with unparalleled autonomy.Our AI OS accumulates knowledge, optimizes processes across various levels, and adapts over time. We are initially focusing on supply chain and large-scale industrial operations, where resilience, speed, and ongoing enhancement are paramount—allowing human talent to concentrate on strategic, creative, and other high-value endeavors.Discover our vision further in our Manifesto. HappyRobot has successfully raised $62 million to date, including a recent $44 million in Series B funding in September 2025. Our esteemed investors include Y Combinator (YC), Andreessen Horowitz (a16z), and Base10—partners committed to our mission of transforming enterprise operations. We are channeling this investment into assembling a top-tier team: individuals driven by relentless ambition, adept problem-solving skills, and a passion for pushing boundaries in a dynamic, high-energy environment. If this resonates with you, we invite you to be part of HappyRobot.About The RoleAt HappyRobot, our Full Stack Engineers take ownership of significant components of our product and infrastructure, delivering from end to end.We seek innovators who thrive in uncertain environments, have a deep appreciation for their craft, and desire genuine ownership of their creations.

About Our TeamAt OpenAI, our Full Stack Engineers are integral to delivering innovative solutions that seamlessly integrate front-end experiences with robust back-end systems. We are expanding our teams across various domains, including Growth, Ecosystems, Personalization, Search Infrastructure, and Platform Engineering, to create user-centric features and foundational services that enhance our offerings.About the RoleWe are seeking passionate Full Stack Software Engineers who thrive at the intersection of front-end and back-end development. In this role, you will:Develop comprehensive web applications and platform features that elevate ChatGPT experiences.Collaborate closely with designers, product managers, and infrastructure teams to deliver cohesive solutions.Design and implement robust APIs, scalable services, and intuitive UI components.Maintain the integrity, security, and performance of the systems you create.Contribute to team best practices in testing, architecture, and the Software Development Life Cycle (SDLC).You May Be a Great Fit If YouPossess experience with both front-end technologies (e.g., React, TypeScript) and back-end frameworks (e.g., Node.js, Python, Go).Are comfortable taking ownership of features from initial design through to deployment.Value high-quality code and exceptional user experiences.We are open to hiring in San Francisco, New York, and Seattle.

Join prosper as a Senior Full Stack Software Engineer, where your expertise will drive innovation and enhance our technology solutions. In this role, you will collaborate with cross-functional teams to develop scalable applications, ensuring high-quality code and performance. Your contributions will help shape the future of our platform and improve user experiences.

About UsAt Valdera, we empower manufacturers to turn their visions into reality by revolutionizing the way they source materials. Our innovative platform simplifies the process of finding top-quality materials and suppliers, enabling manufacturers to create exceptional products at scale and distribute them globally.As a rapidly expanding team, we have established successful partnerships with Fortune 500 industrial manufacturers, beauty brands, and chemical companies. We seek driven and talented individuals who excel in high-performance settings and are eager to advance their careers swiftly.Our culture encourages top talent to tackle significant challenges, collaborate with industry leaders, and witness the tangible impact of their contributions. If you are seeking a dynamic environment where your ideas can foster change, Valdera is the perfect place for you.Join us in shaping the future of manufacturing.

About the RoleJoin us as we revolutionize the application of AI with ChatGPT, aimed at unlocking economic opportunities on a grand scale. This is a rare opportunity to operate at the cutting edge of AI, working on an innovative platform that integrates agents, search/matching algorithms, personalization, user experience (UX), and tangible economic impact. You will help develop AI solutions that significantly enhance people's lives.As millions rely on ChatGPT for career guidance, we are challenging the outdated approaches of static résumés and keyword searches. We are creating a distinct career agent that comprehensively understands skills, assists in certification, and tirelessly seeks to create opportunities. Our vision is to establish a network where job seekers and employers connect based on actual capabilities rather than traditional job postings.In this role, you will:Lead the development of key product areas to create a next-generation AI-driven jobs platform.Design and implement essential systems for candidate matching, verification, skills representation, and workflow automation.Collaborate with research teams to translate new model capabilities into production features that enable users to validate their skills and discover exceptional opportunities.Develop robust, scalable systems that cater to millions of job seekers and employers.Conduct experiments, engage with users, and iterate swiftly to uncover what truly drives successful job outcomes.Work closely with product managers, designers, researchers, and operations to craft AI-enhanced, user-centered experiences.Optimize for performance, reliability, and security to ensure a trustworthy platform fostering economic mobility.You may be a great fit if you possess:A minimum of 5 years of software engineering experience, particularly in developing highly-available user-facing products.Proficiency in full stack development (frontend and backend) and a comfort level with owning features from inception to deployment.A passion for marketplaces, matching systems, or personalization, even if you have not previously built one.Interest in AI-driven user experiences, agents, and workflow automation (direct machine learning experience is not mandatory).Enthusiasm for thriving in a dynamic, fast-paced environment where innovative ideas are rapidly implemented and user impact is prioritized.About OpenAIOpenAI is at the forefront of AI research and development, dedicated to advancing digital intelligence in a way that is safe and beneficial for humanity. We strive to ensure that our cutting-edge technologies are aligned with human values and contribute positively to society.

About the TeamJoin the dynamic ChatGPT team at OpenAI, where innovation meets collaboration across research, engineering, product development, and design. We are dedicated to deploying cutting-edge technology responsibly and safely, ensuring that the benefits of AI are available to everyone, regardless of location or platform. Our mission is to enhance lives through AI, driven by deep insights into user interactions with our products.About the RoleWe are on the lookout for a talented Full Stack Software Engineer to join our burgeoning ChatGPT Growth team. You will lead impactful projects aimed at expanding the user base of ChatGPT and Plus Subscribers. Your responsibilities will include optimizing user access, enhancing notifications, refining SEO practices, promoting value discovery, and driving virality. As we embark on our growth journey, your insights will be crucial in identifying key opportunities for strategic initiatives and incremental improvements. We seek engineers who are driven by impact, thrive in autonomy, and possess a keen ability to extract valuable insights from experimental data to enhance user experiences.Key Responsibilities:Catalyze the long-term growth of ChatGPT by leveraging data analysis, product innovation, and experimentation to refine product experiences.Design and implement robust backend APIs to support enhanced product functionalities.Collaborate closely with cross-functional teams including research, product, design, and data science to ensure alignment with product goals.Foster a diverse and inclusive workplace culture that encourages open communication and challenges conventional thinking.Ideal Candidate Profile:Demonstrated experience shipping web features that optimize user journeys, including landing pages, product interfaces, and purchase flows.Strong analytical skills with a proven track record in designing and executing A/B tests, employing a scientific approach to data-driven experimentation.A passionate learner who actively seeks out knowledge and effectively shares insights with team members.Comfortable navigating ambiguity and adapting to rapidly evolving project landscapes.

About PrimerPrimer is an innovative network of K–8 schools dedicated to revitalizing the fundamental principles of American education. Drawing inspiration from the original teaching primers that cultivated generations of readers, thinkers, and builders, our schools focus on proven methods while preparing for future challenges. We foster close-knit learning environments, empower skilled educators, and maintain a culture that respects children as both learners and leaders.For over 200 years, primers have shaped the American educational landscape. Now, Primer is preparing children for the next chapter.The software we develop underpins our Microschools, facilitating operations from day one. It assists teachers in sourcing real estate, recruiting students, and delivering genuinely personalized education. Our platform provides valuable insights to parents, supports virtual teachers in offering exceptional experiences, and streamlines our back-office operations. We have a broad scope of work ahead and a commitment to making a significant impact.We are assembling a small, talented team of hands-on engineers to play a pivotal role in the evolution of Primer.Role OverviewWe are in search of a skilled Full Stack Engineer to join our dynamic team. In this capacity, you will help reimagine the school experience through modern technology. You will create features that teachers, students, and families depend on daily while addressing tangible challenges in education.This position is based in San Francisco and requires in-office attendance five days a week.ResponsibilitiesTechnical Stack: Engage with technologies including TypeScript, NodeJS, GraphQL, Prisma, Postgres, NextJS, React, and Relay.Collaborative Environment: Collaborate daily with team members across engineering, product, design, and our academic program.Ownership and Growth: Take complete ownership of projects and enhance your skill set. You will have opportunities to lead initiatives that shape the product, with ample room for professional development.Engineering Culture: Contribute significantly to establishing our engineering culture as we expand our team.Deliver Quality Products: We uphold high standards for quality, so be prepared to work diligently to achieve excellence.QualificationsPassion for Education: You possess a genuine passion for transforming the U.S. education system. While this work is challenging, successful outcomes will prove to be the most rewarding of your career.

Join our dynamic team at Braze as a Senior Full-Stack Software Engineer! In this pivotal role, you will collaborate with cross-functional teams to design, develop, and implement innovative software solutions. You will leverage your expertise in both front-end and back-end technologies to create seamless user experiences and optimize system performance.

Mithril is on the lookout for exceptional candidates at the Senior to Principal level. The exact level will be determined based on your experience and proven expertise. We value individuals who offer deep technical knowledge, strategic insights, and a history of impactful contributions. Our roles are tailored to fit each candidate’s unique strengths and career aspirations. About Mithril At Mithril, we are revolutionizing how AI companies harness compute power. Our mission is to orchestrate global compute capacity, making it more accessible and optimized for AI workloads. We are constructing a novel public cloud specifically designed for AI, where accessing high-performance compute is as straightforward and reliable as flipping a switch. Originating from a Stanford PhD lab just over a year ago, Mithril has already attracted backing from premier investors, including Sequoia, Lightspeed, Jeff Dean, and Eric Schmidt, among others. With $80 million in funding, we are securing customers and generating revenue. The current machine learning infrastructure is overly complex, forcing engineers to make hard choices about hardware when they should focus on solving major problems and driving innovation. Our Omnicloud Platform addresses this issue by abstracting hardware management and providing seamless access to computational resources, enabling engineers to concentrate on what truly matters—developing transformative AI solutions. We are not only making compute accessible; we are also making it flexible, scalable, and tailored to meet the unique demands of AI. Our infrastructure marketplace provides state-of-the-art hardware without the usual friction, allowing companies to innovate faster and more efficiently. Working at Mithril As a Full Stack Engineer at Mithril, you will play a crucial role in developing the applications and systems that will shape the future of AI. Your responsibilities will include scaling our platform and ensuring a seamless user experience supported by a robust and efficient infrastructure. In a landscape where AI workloads are increasingly complex, crafting reliable and high-performance software is foundational to our mission. The Omnicloud Platform supports cutting-edge AI workloads, managing vast amounts of data while providing a user-friendly interface for developers and researchers. Full Stack Engineers at Mithril design and implement solutions across the entire stack—from creating intuitive front-end interfaces to architecting scalable backend systems. We expect every engineer to approach problems holistically, balancing performance, scalability, and simplicity, while maintaining a strong focus on user experience.

Vivodyne is building advanced tools to accelerate drug discovery and development by working with large-scale, lab-grown human organ tissues. The company combines biology, robotics, and AI to generate multi-omic data from human tissues, aiming to improve the safety and effectiveness of new therapeutics. Vivodyne partners with major pharmaceutical companies and is backed by leading venture funds. Role overview The Senior Full Stack Software Engineer will join the team in San Francisco (Brisbane), CA. This position collaborates closely with Product to build sophisticated, high-performance web applications that support scientific workflows. The stack centers on React and TypeScript for the frontend, FastAPI for backend services, and Postgres for data management. Work includes designing and developing complex, stateful user interfaces, implementing backend features, and delivering end-to-end solutions. The engineer will focus on creating rich, data-driven interfaces that help scientists design experiments and monitor results. Strong interaction design and state management skills are important. Experience as an "AI native" is valued, as the team uses large language models to speed up prototyping and deliver results quickly. This role directly supports Vivodyne's biotech platform for drug discovery and testing, enabling scientists to work with unique datasets and robotic systems. The applications built will be used in partnership with top pharmaceutical companies. Key technologies React (frontend) TypeScript (frontend) FastAPI (backend) Postgres (database) Location San Francisco (Brisbane), California

Join Collective Health as a Lead Full Stack Software Engineer specializing in claims processing. In this pivotal role, you will leverage your expertise to design, develop, and enhance our software solutions that facilitate seamless claims management. Collaborate with cross-functional teams to innovate and implement robust systems that improve efficiency and user experience.

Join Arena IntelligenceAt Arena Intelligence, we are pioneers in assessing the real-world performance of AI models. Founded by esteemed researchers from UC Berkeley's SkyLab, our goal is to enhance and measure the capabilities of AI technologies for practical applications.Each month, millions leverage Arena Intelligence to understand frontier system dynamics, using our community's insights to foster transparent, rigorous, and human-centric evaluations. Leading organizations and AI laboratories depend on our assessments to gauge real-world reliability, alignment, and implications. Our leaderboards set the benchmark for AI performance, earning trust from industry leaders and influencing global discussions on model reliability and advancements.Our team comprises researchers, engineers, scholars, and innovators from renowned institutions such as UC Berkeley, Google, Stanford, DeepMind, and Discord. We prioritize truth-seeking, agility, and craftsmanship, valuing curiosity and impactful contributions over hierarchy. We're fostering a workplace where thoughtful and diverse individuals can excel. Each team member is a domain expert, contributing to an environment rich in excellence, energy, and focus.Role OverviewWe are looking for a Senior Full-Stack Product Engineer to spearhead the technical design and development of AI-focused products within our platform. This role involves taking ownership of features from inception to deployment—encompassing the proposal of technical solutions, implementation of core product workflows, and analysis of new functionalities' impacts. Ideal candidates should possess substantial experience in constructing reliable business logic at scale and be enthusiastic about influencing user interaction with state-of-the-art AI models.