Senior Software Engineer - Web API Platform

Join our innovative team at Lambda as a Senior Software Engineer specializing in API development. In this pivotal role, you will leverage your extensive technical expertise to design, implement, and optimize robust APIs that enhance our software solutions. Collaborate with cross-functional teams to deliver high-quality products that meet our customers' needs.

The OpportunityAt Enigma, we are at a pivotal moment of growth, receiving enthusiastic feedback from our clients regarding the substantial value our product provides. This feedback drives our urgent need to effectively present the capabilities of our small business data as we expand our sales and marketing efforts.The RoleWe are seeking a skilled Senior Software Engineer to join our dynamic API and Data Delivery Team. In this position, you will be instrumental in designing, constructing, and maintaining essential systems for processing and delivering vast datasets, collaborating with both teammates and clients to address impactful, real-world challenges.What You’ll DoDevelop scalable, highly available, and high-throughput systems deployed in cloud environments.Tackle challenges involving containers, cloud infrastructure, and infrastructure as code (primarily using Docker, AWS, and Terraform).Exhibit a proactive attitude that embraces challenges, regardless of their size.Take pride in writing clean, well-tested, and maintainable code.Thrill in collaborating as part of a motivated and cohesive team.Identify and address problems that may go unnoticed by others.Be driven to create tangible impacts for our customers.Inspire your colleagues to excel while fostering a collaborative and supportive team culture.Manage responsibilities related to architecture, design decisions, hands-on implementation, team organization, and technical mentorship.What Makes This Role Exciting?Impact: Your technical expertise and decision-making will directly influence our customers and the success of our product, affecting critical choices at multi-billion dollar firms.Technical Challenge: Engage with cutting-edge technologies surrounding databases, information retrieval, distributed systems, microservices, elastic scaling, data pipelines, and more.Ownership: The API & Data Delivery team is addressing some of the world's most complex challenges. The ideal candidate is an engineer eager to expand their responsibilities and collaborate with the team to create significant technical and business impacts.

We are seeking a highly skilled Senior Staff Software Engineer specializing in API development to join our dynamic team at Anthropic. In this role, you will have the opportunity to leverage your expertise to design and implement cutting-edge APIs that will enhance our products and services.As a key member of our engineering team, you will collaborate closely with cross-functional teams to understand customer needs and translate them into scalable and efficient solutions. You will be responsible for ensuring that our APIs are robust, secure, and user-friendly.

About Our TeamJoin a dynamic group that is dedicated to delivering OpenAI’s cutting-edge technology to developers globally through our robust developer platform, the OpenAI API. As the foremost AI development platform, our API is utilized by millions of developers and leading enterprises worldwide, powering a majority of the AI applications you encounter daily. Our latest innovations include gpt-5, gpt-realtime, Responses API, Agents SDK, and much more.About the PositionWe are seeking a passionate Software Engineer who will take ownership of our API designs. Our API is integral to our product, and we approach its design and development with meticulous care and intent. Every endpoint, field name, and enum value is a crucial part of the product interface that we strive to perfect. We want engineers who not only excel at creating APIs but also appreciate the nuances of exceptional API design. In this pivotal role, you will significantly influence the future development of the OpenAI API through both design and implementation.Key Responsibilities:Design and create innovative products for our API, including extending existing endpoints, adding new ones, or reimagining our entire API suite.Take a lead role in our API Review process, collaborating with various teams to ensure our APIs meet the highest design standards.Work closely with the API team, Developer Experience team, and Go-To-Market (GTM) team to elevate our APIs to global excellence.You Will Excel In This Role If You:Have a keen eye for API design and recognize the difference between well-crafted and poorly constructed APIs.Thrive in a fast-paced environment where you can work independently with ambiguous goals and requirements.Enjoy building tools for fellow developers and value constructive feedback from discerning users.Are fundamentally an engineer but also willing to engage in product decision-making.View APIs as ladders that empower users.About OpenAIOpenAI is at the forefront of AI research and deployment, committed to ensuring that general-purpose artificial intelligence benefits all of humanity. We continuously push the limits of AI capabilities while prioritizing safe and ethical deployment to maximize positive impact.

At Scribd, Inc., we are dedicated to enhancing human understanding through our innovative products — Scribd®, Slideshare®, Everand™, and Fable — which empower billions around the world to transform access into knowledge, application, and expertise.Culture at Scribd, Inc.We foster a bold and authentic culture that encourages open debate and commitment, allowing our employees to embrace challenges and prioritize customer satisfaction. We believe that optimal performance arises from a balance of individual flexibility and meaningful community connection.Our Scribd Flex program enables team members to select work styles and locations that enhance their productivity, while also committing to intentional in-person interactions that promote collaboration and a vibrant company culture. All employees, regardless of their location, are required to attend occasional in-person meetings.What do we seek in our new hires? At Scribd, Inc., we value “GRIT.” This concept, reflecting the intersection of passion and perseverance toward long-term goals, forms the core of our expectations for every employee. It also serves as a practical framework for our work: achieving Goals, delivering Results, contributing Innovative ideas and solutions, and strengthening our Team through collaboration and positive attitudes.About the TeamOur Web Platform team is a vital part of the Developer Platform organization, driving our company-wide web modernization initiatives.Our mission is to empower product teams by providing a scalable and well-architected API foundation that supports modern web architectures. We collaborate across teams to minimize dependencies, enhance developer experience, and establish robust integration patterns between frontend and backend systems.With a high degree of autonomy and a long-term vision, the platform we develop will influence how teams design, deploy, and evolve our web products.About the RoleWe are actively seeking a Senior Software Engineer for the Web API Platform to contribute to the establishment of a company-wide API platform that accelerates web modernization at Scribd.

Join Convex in Revolutionizing Application Development!At Convex, we are on a mission to revolutionize the way developers build applications by enabling them to create fast, reliable, and dynamic apps without the need for a backend team. Our innovative full-stack app platform is meticulously crafted with database, compute, and backend abstractions, allowing developers and LLMs to rapidly innovate while ensuring scalability and simplicity throughout the product lifecycle.Meet Our Team:Our team comprises talented engineers who have built and designed some of the world’s most extensive backends, handling exabytes of data and millions of transactions per second, while also delivering desktop and mobile software across billions of devices. We pride ourselves on our friendly, collaborative, and passionate culture, thriving in our San Francisco office.The Opportunity:As a key player in our backend platform, you will enhance our standout client API and developer experience. We have dedicated significant resources to perfecting our client libraries, development APIs, and sync protocol, ensuring that Convex is a delight for application developers. We are looking to grow our team to advance the next iteration of the Convex API and redefine the modern application stack.If you are an experienced TypeScript developer with a passion for elegant API design and recognize the importance of robust platforms in the age of AI development, we want to hear from you!Your Responsibilities:Design, develop, and maintain Convex’s client libraries, sync protocol, and query APIs.Stay updated with new frameworks and technologies within the app development landscape.Gain insights into effective abstractions that scale and integrate seamlessly within our stack to create libraries that are user-friendly and maintainable.Work autonomously to prioritize impactful projects while collaborating closely with the engineering team and CTO (hi! I'm James).Contribute to establishing best practices and design guidelines as our team and systems expand.Write engaging and innovative client library code.

ABOUT BASETENAt Baseten, we are at the forefront of AI innovation, providing critical inference solutions for leading AI companies like Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma, and Writer. Our platform combines advanced AI research, adaptable infrastructure, and intuitive developer tools, empowering organizations to deploy state-of-the-art models effectively. With rapid growth and a recent $300M Series E funding round backed by top-tier investors including BOND, IVP, Spark Capital, Greylock, and Conviction, we invite you to join our mission in building the platform of choice for engineers delivering AI products.THE ROLE:As a member of Baseten’s Model Performance (MP) team, you will play a pivotal role in ensuring our platform’s model APIs are not only fast and reliable but also cost-effective. Your primary focus will be on developing and optimizing the infrastructure that supports our hosted API endpoints for cutting-edge open-source models. This role involves working with distributed systems, model serving, and enhancing the developer experience. You will collaborate with a small, dynamic team at the intersection of product development, model performance, and infrastructure, defining how developers interact with AI models on a large scale.RESPONSIBILITIES:Design, develop, and maintain the Model APIs surface, focusing on advanced inference features such as structured outputs (JSON mode, grammar-constrained generation), tool/function calling, and multi-modal serving.Profile and optimize TensorRT-LLM kernels, analyze CUDA kernel performance, create custom CUDA operators, and enhance memory allocation patterns for maximum efficiency across multi-GPU setups.Implement performance improvements across various runtimes based on a deep understanding of their internals, including speculative decoding, guided generation for structured outputs, and custom scheduling algorithms for high-performance serving.Develop robust benchmarking frameworks to evaluate real-world performance across diverse model architectures, batch sizes, sequence lengths, and hardware configurations.Enhance performance across runtimes (e.g., TensorRT, TensorRT-LLM) through techniques such as speculative decoding, quantization, batching, and KV-cache reuse.Integrate deep observability mechanisms (metrics, traces, logs) and establish repeatable benchmarks to assess speed, reliability, and quality.

At Perplexity, we're revolutionizing the way individuals search, reason, and engage with information. Our API team is pivotal to this mission, crafting and managing high-performance interfaces that connect Perplexity’s intelligence with developers, enterprises, and products globally. This team is responsible for the architecture, reliability, and security of the APIs that fuel everything from real-time LLM queries to large-scale enterprise integrations.In the role of Staff Backend Engineer, you will play a crucial part in shaping the technical backbone of Perplexity’s external platform. You will design distributed systems, enhance performance at scale, and establish engineering standards to ensure our APIs are swift, dependable, and enjoyable for developers to work with.

Role Overview Postman is hiring a Senior Software Engineer focused on Monetization for the San Francisco office. This role centers on designing and building new features that support and expand Postman’s monetization efforts. The work directly impacts how users experience and interact with the platform’s paid offerings. What You Will Do Architect and develop features that support revenue growth and user satisfaction Work closely with teams across engineering, product, and design to deliver scalable solutions Ensure that new monetization features maintain high standards for performance and reliability Location San Francisco, California, United States

BitGo stands at the forefront of digital asset infrastructure, providing comprehensive solutions that encompass custody, wallets, staking, trading, financing, and settlement services, all secured through regulated cold storage. Established in 2013, our mission has been to empower clients to confidently navigate the digital asset landscape. With a robust global presence and multiple Trust companies, BitGo caters to thousands of institutions, including many prominent brands, exchanges, and millions of retail investors worldwide. As a critical player in the digital economy, BitGo processes a significant volume of Bitcoin transactions and is recognized as the world's largest independent digital asset custodian and staking provider. For further details, visit www.bitgo.com.This position requires full-time onsite work at our San Francisco office to foster collaborative team dynamics and innovative problem-solving.We are seeking a Senior Software Engineer to join our HSM team, contributing to the development of an API-first platform designed for businesses and developers looking to launch cryptocurrency products.

Who Are We?Postman stands as the premier API platform globally, empowering over 45 million developers and 500,000 organizations, including an impressive 98% of Fortune 500 companies. Our mission is to assist developers and professionals worldwide in constructing an API-first ecosystem by simplifying every phase of the API lifecycle and enhancing collaboration—allowing users to create superior APIs at an accelerated pace.Headquartered in San Francisco, Postman has additional offices in Boston, New York, Austin, Tokyo, London, and Bangalore, where our journey began. We are a privately held company backed by esteemed investors including Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Discover more at postman.com or connect with us on X via @getpostman.P.S: We highly recommend exploring The "API-First World" graphic novel to better grasp our overarching vision at Postman.About the TeamThe Ecosystem team is dedicated to delivering essential extensibility features within Postman that our Ecosystem partners can utilize to create engaging applications for our users.This team plays a critical role in Postman’s journey of feature expansion by ensuring that the product offers capabilities that can be safely and securely leveraged by third-party applications.Collaboration is key, as the team works closely with all of Postman’s product and platform teams.We are engaged in building a product from the ground up, working across frontend, backend, and middleware.What You’ll DoDevelop scalable, reliable, and high-performance systems that meet the needs of thousands of ecosystem developers building applications on Postman, serving hundreds of millions of users.Collaborate with senior engineers and cross-functional teams to fully understand product requirements and develop ecosystem capabilities that enable developers to create the next wave of applications.Draft and review technical specifications, offering constructive feedback to fellow developers.Be accountable for features from inception to deployment, ensuring that a high-quality standard is consistently upheld.About YouYou hold a Bachelor's degree in Computer Science or possess equivalent industry experience.You have proficiency in Java, NodeJS, ReactJS, or similar technologies.You bring 8+ years of experience in constructing backend or full-stack services.Your problem-solving and analytical skills are exceptional.You have experience in developing scalable distributed systems.

Postman Inc. seeks a Senior Fullstack Software Engineer in San Francisco, California, to help advance the future of API collaboration. This role involves working across both front-end and back-end systems, with a focus on building reliable, scalable solutions that support the company’s platform. Responsibilities Design and develop features across the full technology stack, from user interfaces to backend services Collaborate with cross-functional teams to deliver improvements that enhance user experience and workflow efficiency Contribute to architectural decisions and drive ongoing improvements in software design Mentor junior engineers and support the growth of technical expertise within the team Requirements Proven experience building and maintaining fullstack applications Strong understanding of both front-end and back-end technologies Ability to work effectively with engineers, designers, and product managers Interest in shaping technical direction and contributing to team development

OverviewIn today's fast-evolving technological landscape, the educational experiences of both students and teachers are undergoing significant transformations. At Kira Learning, we are committed to leveraging innovative AI technologies to make top-tier teaching and learning accessible to all. As a Senior Software Engineer at Kira, you will spearhead groundbreaking projects, shaping products that enhance educational experiences globally.Kira is a dynamic startup backed by prestigious Venture Capital partners such as New Enterprise Associates (NEA), Andrew Ng’s AI Fund, and Primavera.This full-time role requires flexibility in work hours and availability outside of typical business times. Our offices are located in San Francisco, CA, and New York City, NY, and we expect employees to work in-person four days a week from one of these locations.

At Crusoe, we are on a mission to accelerate the abundance of energy and intelligence, creating an environment where innovation thrives. As we build the infrastructure that empowers ambitious AI-driven projects, we prioritize sustainability without compromising on scale or speed.Join us in being part of the AI revolution with cutting-edge technology at Crusoe, where you will spearhead impactful innovations and collaborate with a team committed to transforming cloud infrastructure responsibly.About This RoleWe are looking for a Senior API Integration Engineer who will act as a vital technical partner in our enterprise-wide digital transformation efforts. This role is pivotal in driving intelligent automation and scalable system integrations, particularly within our People Tech ecosystem, with a strong focus on Workday HCM.What You’ll Be Working OnDesigning and developing enterprise-grade integrations utilizing the Workato ONE platform to facilitate intelligent workflow automation.Creating and maintaining robust API integrations across Workday HCM and the wider People Tech landscape, which includes payroll, ATS, LMS, compensation, benefits, performance, and analytics.Employing AI-driven automation within Workato to enhance efficiency, reliability, and process optimization.Establishing reusable integration architecture patterns, frameworks, and governance standards that can scale across both automated and human-led workflows.Collaborating with business and IT stakeholders to gather requirements, lead discovery sessions, assess ROI, and translate complex needs into scalable tech solutions.Overseeing integration initiatives from concept through deployment, including sprint execution, technical reviews, and delivery accountability.Providing senior-level escalation support to ensure the reliability and monitoring of critical integrations.What You’ll Bring to the TeamA minimum of 7 years of experience as an API Developer or Integration Engineer in enterprise-level environments.At least 3 years of hands-on production experience with Workato, especially with Workato ONE.Proven expertise in building and maintaining complex Workato integrations.

About Our TeamThe Foundations team is instrumental in building and enhancing the application-level infrastructure that drives Hex's success. We are the backbone of shared backend systems, frameworks, and primitives that empower other teams, enabling the company to accelerate its growth while upholding principles of reliability, performance, and security.Our work encompasses a wide range of technologies, including APIs, real-time transport, storage frameworks, background processing, and internal tools. Instead of delivering isolated features, we prioritize the development of robust systems that can scale with the company's growth and simplify product development for all.Role OverviewWe are in search of a Senior Backend Software Engineer to contribute to the design, maintenance, and evolution of core systems utilized across Hex. This role emphasizes backend architecture and shared infrastructure, with responsibilities spanning APIs, real-time communication, data access frameworks, job orchestration, and internal admin tooling.You will collaborate closely with product engineering teams to understand their needs and transform common patterns into durable, reusable systems. Your input will be vital in establishing standards, influencing architecture, and enhancing the overall quality of our backend systems.While frontend experience may aid in understanding end-to-end workflows, this position primarily focuses on backend development.Your Key ContributionsYou will play a pivotal role in evolving several foundational areas, including:APIsGraphQL (schema design, performance, developer ergonomics)Authentication & Authorization (security, scalability, correctness)Multiplayer & Collaboration APIs (real-time state management, concurrency)TransportWebSockets and real-time communication infrastructureStorage FrameworksPostgres (schema design, query optimization, migrations)S3, DynamoDB, RedisJob & Workflow SystemsBullMQ and background job processingTemporal or similar workflow orchestration systemsInternal ToolingInternal admin tools for debugging, operations, and customer support

Join Lever as a Senior Engineering Manager, where you'll lead a dedicated team that plays a critical role in maintaining our platform APIs. Your expertise will guide the development of essential services, including user management, authentication, and payment gateways, while fostering a collaborative team environment.We are passionate about building the future of hiring software, which is trusted by industry leaders such as Netflix, Yelp, Cirque du Soleil, Shopify, and Spotify. As a part of our team, you will contribute to a culture that values innovation and growth, and be recognized in a company that has been honored as a top workplace in San Francisco and the broader United States.

About UsParallel is a leading web infrastructure company empowering businesses across sales, marketing, insurance, and software development to create state-of-the-art AI agents. Our innovative products provide flexible and robust programmatic access to the web.With a successful funding round of $130 million from prestigious investors including Kleiner Perkins, Index Ventures, Spark Capital, Khosla Ventures, First Round, and Terrain, we are assembling a stellar team of engineers, designers, marketers, and operational experts to revolutionize web technology for AI.Role Overview: As a key member of our technical staff, you will be responsible for developing and maintaining our backend infrastructure, which currently manages millions of requests daily. Your focus will be on ensuring high reliability and performance while exceeding customer expectations as we expand our services. You will also play a crucial role in maintaining our API, making it user-friendly and easy for developers to integrate.What We Seek: You possess a profound understanding of distributed systems, database management, and maintainable code architecture. Your ability to evaluate trade-offs between speed, scalability, and developer experience is essential. You are passionate about creating products and APIs that have significant real-world impact and are beloved by developers.Life at ParallelOur team operates fully in-person between our headquarters in Palo Alto and our San Francisco office. We pride ourselves on being a flat organization with a dense talent pool dedicated to tackling complex technical and creative challenges.We are looking for individuals who share our enthusiasm for applying science, creativity, and consistency to solve large, intricate problems that yield substantial outcomes. Our core values include:Customer Impact: We take ownership of delivering tangible results for our clients.Craftsmanship: We obsess over every detail, as quality compounds.Change Acceleration: We prioritize rapid shipping and swift adaptation, bringing innovative ideas to production.Win-Win Solutions: We creatively turn challenges into opportunities.High-Conviction Decisions: We embrace experimentation; we learn from failures and celebrate our successes.Compensation & BenefitsCompetitive salaryGenerous equity optionsVisa sponsorship available401K retirement plansDaily lunch and office snacks

Who We ArePostman is the premier API platform utilized by over 45 million developers and 500,000 organizations globally, including 98% of the Fortune 500. Our mission is to empower developers and professionals worldwide to create an API-first environment by simplifying every stage of the API lifecycle and enhancing collaboration, thereby enabling users to build superior APIs more swiftly.Headquartered in San Francisco, we also maintain offices in Boston, New York, Austin, Tokyo, London, and Bangalore—our city of origin. As a privately held company, we have secured investments from leading firms such as Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Discover more at postman.com or engage with us on X at @getpostman.P.S: We highly recommend exploring The "API-First World" graphic novel to gain insight into our broader vision at Postman.About the TeamThe Client Platform organization is dedicated to paving the way for building, testing, and deploying Postman’s web and desktop applications. We are responsible for frameworks, design systems, SDKs, build tools, and shared infrastructure that product engineers rely on daily. The UI Platform group is focused on developing reliable, accessible, and high-performance UI foundations that are used across Postman.The OpportunityAs a Senior Software Engineer on the Client Platform team, you will play a key role in shaping the front-end infrastructure that Postman depends on. This encompasses the design system and reusable components that enhance both web and desktop experiences. Your contributions will significantly impact how hundreds of engineers build, fostering consistency, performance, and an improved developer experience.This position involves hands-on work. You will create components, establish UI architecture, and collaborate with engineers and designers to transform concepts into scalable UI systems. In this role, you will advance the UX layer, enabling teams to deliver high-quality features without the need to reinvent core patterns.What You’ll DoEnhance front-end architecture, including component libraries, layout patterns, theming, and global UI behaviors.Develop specialized UI components as needed (e.g., editors, grids, structured data components) with a focus on performance and usability.Ensure components meet accessibility standards, keyboard interaction patterns, and internationalization/localization requirements.Assist product teams in embracing UI Platform components and patterns, offering guidance and identifying opportunities to simplify or expand the platform.

About FernAt Fern, we empower software companies to deliver exceptional API experiences. Our clientele includes renowned firms like Nvidia, Square, and Twilio, alongside innovative AI startups such as ElevenLabs and OpenRouter.As we look to the future, the majority of API integrations will be handled by AI agents. These agents require clearly defined schemas, structured endpoints, deterministic contracts, and concise documentation that can seamlessly integrate into their workflows.Our team, comprised of top-tier talent from Google, Palantir, Amazon, and Uber, thrives in a dynamic environment in Williamsburg, Brooklyn. With our recent acquisition by Postman, we now have access to 40 million users and 98% of the Fortune 500, while retaining our agile startup ethos.About the RoleAs a Frontend Software Engineer at Fern, you will create the interfaces that shape how developers and agents interact with APIs.Craft Exceptional Developer Interfaces: Develop sleek, responsive web experiences utilizing TypeScript and Next.js. Design documentation, dashboards, and tools that simplify complex API interactions.Focus on Performance and Quality: Deliver frontend solutions that are fast, dependable, and visually stunning. You will take ownership of architectural choices and the finer details that elevate our products. Discover how we leverage Vercel and Next.js for efficient multi-tenancy and expedited development cycles.Engage with Customers: Collaborate directly with API teams from industry giants like Nvidia, Twilio, and Square. You will troubleshoot real-world production challenges, refine APIs based on user insights, and implement enhancements swiftly.