Senior Node.js Engineer at The League | San Francisco

Join Our Team as a Senior Node.js Engineer!At The League, we’ve achieved product-market fit and developed a successful business model, and we’re excited to expand our founding engineering team with passionate individuals who want to take ownership of significant parts of our product and embark on this journey with us.We are on the lookout for a highly skilled Senior Node.js Engineer to bolster our back-end systems. This role is perfect for someone adept in distributed systems and eager to engage across the entire technology stack. While our app is recognized as an exclusive dating platform, we have grand aspirations for our product, and we need your expertise to realize that vision.As our lead Node.js architect, you will be pivotal in enhancing the quality, features, and scalability of The League App. We seek an exceptional backend engineer who has experience scaling platforms, possesses natural leadership qualities, and is hands-on in back-end development. You will set high standards for quality and be instrumental in delivering an unparalleled app experience.Our Technology Stack: The League app utilizes Node.js, Postgres, Redis, and ElasticSearch, with an iOS and Android frontend.About Our Team: Our engineering team is rapidly growing, and as our second full-time hire, you will have a substantial impact, ownership, and opportunities for leadership. Currently, our team collaborates with about eight engineering contractors and has another eight full-time staff in support, product, and marketing roles.Your Responsibilities:Lead the Node.js backend development for our iOS and Android app, including the matching algorithm.Develop new features, resolve bugs, and propose projects to enhance the product and infrastructure.Collaborate with our Director of Engineering to cultivate a top-tier engineering culture.Make autonomous technical and product decisions aligned with our roadmap.Conduct interviews for full-time engineering roles.Mentor junior engineers to foster their growth.Establish deployment workflows to maximize productivity.Perform code reviews to ensure adherence to best practices.Support DevOps initiatives as needed and assist in the search for a dedicated DevOps team.

Are you a visionary technical leader ready to elevate mobile applications to new heights? The League, a pioneering mobile dating app startup, is seeking a Vice President of Engineering to spearhead our engineering efforts and propel our iOS and Android applications into the future! In this pivotal role, you will be entrusted with building our in-house engineering team and enhancing the quality, features, and scalability of The League App.We are in search of an exceptionally skilled senior backend engineer with experience scaling platforms to over 1 million Daily Active Users (DAUs) and transitioning into management roles while maintaining a hands-on approach with backend development. As a seasoned engineer, you'll set the quality standards and be instrumental in delivering an unparalleled app experience.Technology Stack: Our application is developed using Node.js, Postgres, Redis, ElasticSearch, with frontend technologies for both iOS and Android.Team Dynamics: Our rapidly expanding team currently consists of approximately 8 engineering contractors—3 front-end developers, 4 back-end developers, and 1 back-end intern—alongside 1 full-time onsite tester collaborating with an outsourced QA team. Additionally, we have 8 full-time professionals dedicated to support and marketing.Key Responsibilities:Cultivate a best-in-class engineering culture.Oversee the product roadmap in collaboration with the PM and CEO, regularly updating it with new initiatives.Manage product analytics to suggest enhancements for revenue increase, engagement growth, and churn reduction.Source, evaluate, and hire full-time engineering talent.Supervise both engineers and contractors effectively.Create and manage weekly sprints.Mentor junior engineers to foster their growth.Define and optimize deployment workflows for maximum efficiency.Conduct code reviews to ensure adherence to best practices.Build and uphold an accountable engineering culture, rewarding achievements and addressing missed sprints.Manage all DevOps responsibilities and lead the search for a DevOps team if necessary.Oversee the engineering budget and implement strategic measures to reduce burn.Prioritize core initiatives with the PM on a weekly basis.

Anthropic is hiring a Staff Software Engineer to focus on Node Infrastructure. This position is based in San Francisco, New York City, or Seattle. Role overview This role centers on designing, building, and maintaining the core systems that support Anthropic’s services. The work directly affects the reliability and scalability of the company’s AI offerings. Collaboration Work closely with a skilled engineering team to develop infrastructure that supports high-quality AI solutions. The team values input and hands-on problem solving from every member. Impact Efforts in this role help ensure Anthropic’s services remain stable and can grow as demand increases. The systems you help create will play a key part in the company’s ability to deliver dependable AI products.

Role Overview The City and County of San Francisco is hiring a Senior Stationary Engineer. This full-time role focuses on operating and maintaining stationary engines and related equipment across city facilities. The position directly supports the reliable operation of heating, cooling, and power generating systems that serve the community. Key Responsibilities Operate and maintain stationary engines and mechanical equipment in city buildings Monitor system performance to ensure efficient operation of heating, cooling, and power systems Address routine and emergency maintenance needs as they arise Collaborate with team members to support continuous city services What We Look For Strong knowledge of mechanical systems and stationary equipment Commitment to safety and sustainable practices Ability to work effectively as part of a team Experience supporting building infrastructure operations Location This position is based in San Francisco.

Join us on-site in the vibrant Dogpatch neighborhood of San Francisco as a Senior Backend Engineer.About GigaGiga, a pioneering voice AI startup, has successfully secured a $61M Series A funding and boasts an impressive roster of clients including DoorDash. We are dedicated to revolutionizing the customer experience through real-time AI agents capable of understanding emotions and resolving issues instantly, while being scalable across the globe's largest enterprises.This is a pivotal moment for our company as we aim to expand our horizons. Our ambition is to position Giga as the premier AI platform for enterprise automation, driven by our cutting-edge voice superintelligence. To realize this vision, we are seeking exceptional engineers to join our team.Our engineers are empowered to make significant impacts, influencing the daily experiences of millions. This unique opportunity allows you to work alongside visionary founders, contribute to a commercially successful venture, and help shape a generational company. Here are some highlights about us:Voice AI startup Giga raises $61M Series ADoorDash and Giga PartnershipGiga is trusted by leading B2C companies around the world to manage their most complex support and operational workflows across various communication channels including voice, chat, and email. If this excites you, we encourage you to apply!The RoleWe are searching for innovative backend engineers to develop the infrastructure and systems that power our AI agents. You will engage with a variety of technologies from data pipelines and analytics to real-time agent systems, delivering features that have a direct impact on our customers' operations.This position grants you the freedom to own challenges from start to finish—identifying the optimal approach, constructing solutions, and refining them based on your findings.What You'll Work OnHere are a few key projects from our current roadmap:Analytics overhaul: Transitioning our analytics service to ClickHouse and optimizing it for the next phase of growth.Hallucination detection: Enhancing our detection systems with the aim of minimizing hallucination occurrences.Browser agent utilization: Scaling and stabilizing our systems to ensure robust performance.

Join Our Innovative TeamServal is at the forefront of revolutionizing enterprise operations through our AI-native automation platform. We specialize in developing intelligent agents that comprehend and execute real-world workflows seamlessly, replacing outdated manual processes and inflexible legacy systems with dynamic, learning software solutions. Established in 2024, we are proud to be trusted by industry leaders such as General Motors, Notion, Vercel, and more, to streamline high-volume operational tasks across their organizations.At the heart of our operations is an agentic AI platform that converts natural language into efficient, production-grade workflows. Our agents go beyond mere response mechanisms; they engage in reasoning, execute actions across various systems, and continually enhance their capabilities with use. Initially focused on operational tasks, our platform has swiftly expanded to serve diverse functions including IT, HR, Finance, Security, Legal, and Engineering.Our mission is to eradicate repetitive, manual tasks and empower teams through intelligent automation. Ultimately, we aim to construct a universal AI operations layer—a network of agents that integrates with business functions to drive seamless workflows and propel modern companies forward.Position OverviewAs the Senior IT Engineer at Serval, you will be pivotal in developing and refining our internal IT capabilities, utilizing our own ITSM platform as your primary toolkit. Your role will involve leading infrastructure projects and ensuring smooth daily operations as our company scales. This is a full-time, onsite position in San Francisco (5 days/week).This role transcends traditional IT responsibilities; it’s an opportunity to shape the future of IT service management. You will actively test our platform in production environments and provide valuable operational insights to our Product and Engineering teams. Your on-the-ground experiences will directly influence how our product serves IT professionals globally.

About AirwallexAirwallex is a revolutionary unified payments and financial platform designed for global enterprises. Leveraging our unique blend of proprietary technology and software, we empower over 200,000 businesses globally, including industry leaders like Brex, Rippling, Navan, Qantas, and SHEIN, providing them with comprehensive solutions for managing business accounts, payments, spend management, treasury functions, and embedded finance at a global scale.Founded in Melbourne, we boast a diverse team of over 2,000 innovative professionals across 26 offices worldwide. With a valuation of US$8 billion and support from prominent investors such as T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, and Salesforce Ventures, Airwallex is at the forefront of developing the future of global financial platforms. Join us to embark on the most ambitious journey of your career.

Join Our Team at GridwareGridware, a pioneering technology firm based in San Francisco, is committed to enhancing and safeguarding the electrical grid. We have developed an innovative class of grid management known as Active Grid Response (AGR), which focuses on monitoring critical electrical, physical, and environmental parameters that influence grid reliability and safety. Our state-of-the-art AGR platform employs high-precision sensors to identify potential issues at an early stage, facilitating proactive maintenance and fault mitigation. This holistic approach promotes safety, minimizes outages, and ensures optimal grid performance. Backed by notable climate-tech and Silicon Valley investors, we are on a mission to redefine grid management. For more details, visit www.Gridware.io.Role OverviewWe are seeking a detail-oriented, technically proficient Senior IT Engineer to join our dynamic team. In this pivotal role, you will spearhead network architecture and facility build-outs, champion IT compliance initiatives, and oversee cross-functional projects from inception to successful completion. This is a highly impactful position ideal for a professional who excels in building robust systems, enforcing critical standards, and delivering complex technical projects within a fast-paced, growth-oriented environment.

The Baseball Data Platform team at Major League Baseball builds and maintains the core systems behind MLB statistics. These systems power everything from Statcast to ABS, supporting fans, broadcasters, stadiums, MLB Clubs, and the league. Nearly every data point in professional baseball connects back to this group’s work. Role overview This Associate Software Engineer position is based in San Francisco, California. The role centers on developing and enhancing the systems that deliver baseball data to millions of people worldwide. What you will do Work with engineers, product developers, and designers to build and improve applications and systems Contribute to products that serve a global audience of fans, teams, and partners Help shape the technology used throughout the sport Collaborate within a supportive, results-driven team Requirements Interest in advancing technology within baseball as a software engineer Enjoyment of teamwork and tackling complex problems with others Willingness to learn from and contribute to an experienced engineering group

At Comulate, we are revolutionizing the insurance back office through the power of AI. Our innovative platform streamlines costly and labor-intensive accounting processes, marking the beginning of our mission to unlock the vast sums spent on manual insurance operations. Our Series B funding, announced in early 2025 and led by BOND & Workday, follows a period of remarkable growth and ambitious expansion plans.Why Join Us?Unprecedented growth trajectory, achieving 8-figure ARR within just three years, placing us in the 95th+ percentile of startup growth.Demonstrated strong product-market fit, with users praising our platform as “the best thing since sliced bread” and “life-changing”.A lean and talented team focused on developing category-defining products for prominent public and private enterprises, driving significant ROI and sustainable operations.We are making bold, innovative bets for a dedicated customer base, with an exciting pipeline of new clients on the horizon.We are just beginning to realize our vision and are well-positioned to integrate AI into crucial workflows across the insurance sector.Role OverviewWe are seeking a Senior Software Engineer to join our in-office team in San Francisco. You will be responsible for developing essential systems, services, and customer-facing features from start to finish. Your work will involve transforming high-level objectives into tangible outcomes, navigating ambiguity, and innovating to discover optimal solutions. As an early member of our team, you will play a crucial role in shaping our company culture and team dynamics.Our technology stack includes: TypeScript, Node, Postgres, React, GraphQL (Apollo), and Next.js.Discover more about our engineering culture and insights on our engineering blog.Are You a Good Fit?A strong desire to innovate and improve software processes.

About AirwallexAirwallex stands as the leading unified payments and financial platform for businesses operating on a global scale. With our innovative blend of proprietary infrastructure and software, we empower over 200,000 enterprises worldwide—including renowned names such as Brex, Rippling, Navan, Qantas, and SHEIN—by providing fully integrated solutions that encompass business accounts, payments, spend management, treasury services, and embedded finance.Founded in Melbourne, we boast a dynamic team of over 2,000 talented professionals across 26 global offices. Valued at US$8 billion and supported by top-tier investors like T. Rowe Price, Visa, Mastercard, and Sequoia, Airwallex is at the forefront of sculpting the future of global payments and financial services. If you are poised to undertake the most ambitious work of your career, we invite you to join us.Attributes We ValueWe seek builders with entrepreneurial spirit who are eager to make a significant impact, accelerate their learning, and take true ownership of their work. You should possess strong expertise in your role, coupled with sharp analytical skills. Your motivation aligns with our mission and operating principles. You are quick to act with sound judgment, driven by curiosity, and make decisions based on first principles, effectively balancing speed and thoroughness.Collaboration and humility are key traits; you transform innovative concepts into tangible products and possess a strong ability to execute projects from start to finish. Leveraging AI to enhance productivity and solve problems efficiently is part of your approach. In this role, you’ll address complex, high-visibility challenges alongside an exceptional team, advancing your career as we redefine the landscape of global banking.About the TeamThe Corporate IT team encompasses our IT support, IT engineering, and business engineering functions at Airwallex. The IT Engineering team is pivotal in shaping our technological landscape, managing everything from communication tools and video conferencing to overseeing our computers, applications, and identity and access management. We design, develop, and operate the systems and services that our Airwallex teams utilize to innovate our products, serve our customers, and conduct our business operations. Collaboration is essential, as we partner with every department—from Finance to Engineering, People Operations, and Support—to address challenges and create effective solutions.What You’ll DoAs a Senior IT Engineer, you will lead the resolution of technical challenges faced by our business and IT operations teams. You will...

Briefly is leveraging artificial intelligence to enhance the efficiency of law firms. We are seeking a Senior Engineer to join our dynamic team and contribute to the development of our innovative product. The ideal candidate will appreciate the fluidity of early-stage projects and thrive in a rapidly evolving environment. Key Responsibilities- Engage actively in evaluating and implementing product requirements.- Contribute significantly to architectural decisions and discussions.- Independently write clean, efficient, and thoroughly tested code. Technology Stack- Proficient in TypeScript/JavaScript (web & Node)- Experienced with React- Knowledgeable in SQL (PostgreSQL)- Familiar with Git/GitHub including GitHub Actions Additionally, you will have the opportunity to work with and expand your skills in the following technologies:- Azure OpenAI API- pgvector- Supabase- Azure cloud services We adhere to an Agile development methodology, focusing on continuous integration and deployment. Experience in this type of environment is advantageous. Company CultureOur ideal candidate flourishes in a talented team that is dedicated to producing exceptional work. Our CTO, Chris, brings valuable insights from his experience with multiple startups, helping us navigate common pitfalls.We aim to foster an environment where individuals can take pride in their contributions, where thoughtful goal-setting supersedes frantic heroics, and where ownership is not only encouraged but is a fundamental part of our ethos. You will have both the freedom and responsibility to take charge of projects that inspire you. Join us in transforming the legal technology landscape and making a significant impact in the industry! For more information about this role, please reach out directly to Chris via email. Visit our website at https://briefly.legal for more details.

Join Our TeamAt Stytch, we pride ourselves on being the premier identity platform tailored for developers. Our innovative features, such as device fingerprinting and secure account takeover-resistant authentication, empower businesses to manage identity and access with confidence. As a Senior Software Engineer, you will collaborate closely with leadership to elevate our product experiences to unparalleled levels. Your role will involve architecting solutions across our technology stack, overseeing the design and implementation of team projects, and focusing on the most vital initiatives on our product roadmap.This is a hybrid full-time role based in the SF Bay Area. While we value in-office collaboration, we understand the importance of flexibility. We aim for team members to work in the office three days a week, fostering strong connections while allowing for remote work flexibility.What Inspires YouA collaborative workspace that allows you to see the direct impact of your work on user experience.A passion for mentoring fellow engineers and nurturing the next generation of engineering leaders at Stytch.The ability to envision future system designs while delivering incremental improvements and making strategic trade-offs to accelerate value delivery.A deep pride in your code, with a commitment to writing, reviewing, and maintaining high-quality software.An eagerness to shape team culture and drive growth through effective recruitment of senior engineers and streamlined operational processes.A desire to create user-friendly products that simplify the lives of developers both internally and externally, enhancing the experience for Stytch's customers.What We Seek5+ years of experience as a backend or backend-focused full-stack engineer.Basic familiarity with frontend technologies (ability to debug frontend as necessary; frontend expertise not mandatory).Experience with Go, Node.js, TypeScript, and React.

Senior Software EngineerEngineeringProlific is at the forefront of AI innovation, crafting the essential human data infrastructure that is transforming the AI development landscape. In an era where foundational AI technologies are becoming increasingly common, it is the quality and diversity of human-generated data that sets apart leading products and models.The roleWe seek impact-driven Software Generalists to join our expert team dedicated to supporting frontier model creators and enterprise AI application developers. As a full-stack engineer, you will collaborate across Prolific’s various domains to address customer and product challenges.This position offers an exhilarating chance to engage directly with pioneering AI companies, making vital technical decisions that balance agile startup execution with scalable, reliable engineering practices, as Prolific transforms research within the AI community. You will regularly collaborate in person with customers and our US team, while also working closely with our technology teams based in the UK.What you’ll bring to the roleOver 4 years of experience in a product engineering roleAbility to translate business concepts into effective software modelsCapacity to quickly learn and adapt across the breadth of Prolific’s domainsExperience working with both monolithic and distributed systemsExcellent communication and collaboration skills for direct customer interactionStrong understanding of modern web applications and architecture design patternsExperience in supporting applications within production environmentsSound judgment in technical decisions

The Center for AI Safety (CAIS) is at the forefront of research and advocacy dedicated to addressing the societal-scale challenges posed by artificial intelligence. Our mission is to mitigate the risks associated with AI through innovative technical research, initiatives to foster the field, and strategic policy engagement. Together with our sister organization, the Center for AI Safety Action Fund, we tackle some of the most pressing issues in AI today. In the role of Senior Research Engineer, you will immerse yourself in the dynamic intersection of pioneering machine learning research and dependable engineering practices. You will own research projects from inception to publication, working autonomously with guidance from an advisor. Your responsibilities include designing and conducting experiments on large language models, developing the necessary tools for large-scale model training and evaluation, and transforming findings into research publications. You will collaborate closely with CAIS researchers, as well as external academic and commercial partners, utilizing our compute cluster for extensive training and evaluation. Your work will cover critical areas such as AI honesty, robustness, transparency, and the investigation of trojan/backdoor behaviors, all aimed at reducing the real-world risks posed by advanced AI systems.

Join our dynamic team at abridge as a Senior IT Systems Engineer. In this pivotal role, you will leverage your expertise to design, implement, and maintain robust IT systems that drive our business operations forward. Collaborate with cross-functional teams to innovate and enhance our technological infrastructure, ensuring seamless integration and optimal performance.

radii seeks a Senior Engineering Manager to guide its engineering team in San Francisco. This role involves overseeing several projects at once, shaping engineering practices, and ensuring the delivery of reliable, high-quality products. Key responsibilities Supervise and coordinate multiple engineering projects simultaneously Set and uphold strong engineering standards across the team Collaborate with cross-functional teams to support product objectives Mentor engineers and foster their professional growth Encourage innovation and seek ways to improve team efficiency Location This role is based in San Francisco and requires onsite leadership.

Astranis is looking for a Senior Propulsion Engineer to lead the design, construction, and testing of propulsion systems for its advanced satellites in San Francisco. This position plays a key part in developing new propulsion solutions and improving system performance for high-orbit missions. What you will do Drive the full lifecycle of propulsion system development, from initial design through build and testing. Develop new solutions to enhance propulsion system performance for Astranis satellites. Mentor and guide junior engineers on technical projects and day-to-day work. Support the assembly and production of satellites that expand network access to underserved regions. Role focus This role centers on hands-on engineering and technical leadership. The Senior Propulsion Engineer’s work has a direct impact on the reliability and performance of satellites that serve commercial, government, and military clients.

Join fuku as a Senior/Staff Engineer, where you will play a pivotal role in shaping the future of global payments infrastructure. This position is based in either San Francisco, CA, or New York, NY. At fuku, we are committed to revolutionizing the way payments are processed, currently facilitating $1.5 billion annually to over one million payees. Our focus is on developing high-scale, reliable backend systems that ensure seamless transactions for gig workers and businesses alike.Our company culture promotes:- Autonomy and ownership in your work- Fast-paced, iterative product development- Collaboration with a team of highly skilled engineers- Designing systems capable of handling extensive financial data reliablyAs a Senior/Staff Engineer, you will be responsible for designing, building, and scaling production-ready backend systems capable of processing large volumes of data. You will work across the entire stack, partner with product and engineering leadership, and make significant technical decisions.This role is ideal for engineers who:- Excel in high-impact, ambiguous environments- Enjoy constructing end-to-end systems with tangible results- Are passionate about developing scalable FinTech infrastructure- Thrive in an environment that encourages rapid iterations and robust system development.Your tech stack will include:- Frontend: React- Backend: Python- Infrastructure: AWS, ECS- Tools: GitHub, Linear, Slack, NotionResponsibilities:- Design and implement scalable backend systems for high-throughput payments- Launch and refine applications and large-scale software projects- Collaborate with product and engineering teams to drive impactful results- Work with substantial datasets and distributed systems- Optionally engage in recruiting activities, including sourcing and interviewing engineering talent.

The League is seeking a strategic and dynamic Head of Analytics to lead our analytics department in San Francisco. This pivotal role involves overseeing junior analytics teams while ensuring that various departments within the business comprehend their operational health, discover growth levers, and pinpoint optimization opportunities. As the Head of Analytics, you will spearhead initiatives that enhance business performance through the utilization of existing and novel data sources and methodologies. This role requires a hands-on approach to tackle complex analytical challenges alongside Engineering, Product, and Marketing teams, often serving as the representative for both Analytics and Product Operations.Key Responsibilities:Team Development: Identify essential roles, attract talent, select candidates that align with our culture, and secure competitive hires.Team Management: Foster a capable and enthusiastic team aligned with high-impact projects. Support career growth for analysts and business intelligence engineers, ensuring they recognize their contributions and understand complex statistical concepts.Work Guidance: Direct efforts across marketing, operations, and product analytics, including LTV predictions, operational metrics, user segmentation, and AB testing best practices.Technology Leadership: Advocate for technological investments that position analytics as a strategic advantage, including business intelligence tools and unified customer data views.Cross-Departmental Collaboration: Work closely with leadership to ensure data-driven decision-making across all business units.