Software Engineer, API Platform

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 …

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.

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.

About Scribd:At Scribd Inc. (pronounced “scribbed”), our vision is to ignite human curiosity and foster a world enriched with stories and knowledge. We invite you to join our dynamic team as we democratize the sharing of ideas and information, and empower collective intelligence through our suite of innovative products: Everand, Scribd, Slideshare, and Fable.This job posting highlights an approved, open position within our organization.We cultivate a culture where our employees can express authenticity and embrace boldness. We encourage robust debates and commitment while adapting to the unexpected, ensuring each team member is empowered to take meaningful action focused on our customers.Our workplace structure emphasizes a balance between individual flexibility and community connectivity. Through Scribd Flex, our flexible work benefit, employees can collaboratively choose the work style that best meets their unique needs, in partnership with their manager. A key aspect of Scribd Flex is our emphasis on intentional in-person interactions to enhance collaboration, culture, and camaraderie. Therefore, occasional in-person attendance is essential for all Scribd Inc. employees, regardless of their location.What do we seek in our new team members? We hire for “GRIT.” The essence of GRIT is the convergence of passion and perseverance toward long-term objectives. At Scribd Inc., we believe in the immense potential unlocked by this mindset, and we encourage every employee to embody a GRIT-ty approach in their responsibilities. Specifically, we are looking for someone who can set and achieve Goals, deliver Results, bring forth Innovative ideas and solutions, and positively impact the broader Team through effective collaboration and attitude.The TeamOur Web Platform team is an integral part of the Developer Platform organization, championing our broader Web Modernization initiatives across the company.Our mission is to accelerate product teams by providing a scalable, thoughtfully designed API foundation that supports modern web architectures. We collaborate across the organization to minimize dependencies, enhance developer experience, and establish robust integration patterns between frontend experiences and backend systems.

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.

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.

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.

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.

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.

About the RoleAs a leader in the rapidly evolving field of automated video editing, Descript is at the forefront of innovation. Our platform empowers media companies to transform thousands of podcast episodes into engaging social media clips and enables marketing teams to effortlessly produce product demos with each release. Agencies can streamline client content processes while maintaining consistent branding, all at scale.In your role as the Product Manager for this pioneering initiative, you will develop and oversee the platform that makes these capabilities a reality. You will design APIs that allow developers to programmatically import media, implement AI-driven edits, and export content. Essentially, you will be transforming Descript's robust editing functionalities into a reliable infrastructure that media enterprises can trust.

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.

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 AnthropicAt Anthropic, we are dedicated to developing advanced AI systems that are not only reliable and interpretable but also safe for our users and society at large. Our rapidly expanding team comprises passionate researchers, engineers, policy experts, and business leaders all collaborating to create beneficial AI solutions.Role Overview:As a pivotal member of our UI Platform team, you will contribute to Claude.ai, Anthropic's flagship consumer product, which encompasses web, mobile, desktop, and browser extensions. Your role will revolve around building the core infrastructure, components, APIs, and tooling that enable our product teams to deliver high-quality features swiftly and reliably.Your contributions will include designing and deploying shared components and design-system abstractions, enhancing the backend-for-frontend (BFF) APIs, and optimizing the build, deployment, and observability systems that ensure Claude.ai functions seamlessly across all platforms. The impact of your work will significantly accelerate innovation across teams while maintaining stability in user experiences.If you are passionate about enhancing developer experience and want your engineering contributions to multiply the impact across various features, this role is tailor-made for you.

Join our dynamic team at SonSoft Inc. as a MuleSoft Anypoint API Platform Associate! This is an exciting opportunity to work with cutting-edge technology in a collaborative environment. As a key player in our organization, you will assist in developing and managing APIs that enhance our services and improve client interactions.In this role, you will gain hands-on experience with the MuleSoft Anypoint platform, contributing to the design and implementation of API solutions. You will work closely with cross-functional teams to ensure that our API strategies align with business objectives.

Join Our Team at ConversionAt Conversion, we are pioneering the future of marketing automation through our AI-driven platform, designed specifically for modern software companies. Traditional marketing tools are often outdated and fragmented, leading to ineffective strategies. Our mission is to repair these broken funnels and misaligned messaging.With Conversion, growth teams can manage their entire go-to-market strategy seamlessly within a single interface. From customer acquisition to activation and retention, everything is streamlined, personalized, and enhanced by AI technology.Having secured over $28 million in funding from notable investors like Abstract Ventures, True Ventures, and HOF Capital, we are experiencing rapid growth with over $5 million in ARR and more than 4000 satisfied customers.Our compact yet high-performing team based in San Francisco is looking for passionate individuals who thrive in a creative, product-led marketing environment. If you're eager to collaborate with top-tier talent and contribute to innovative solutions, we want to connect with you!Over $28M raised in funding$0 to $6M ARR achieved in under a year, serving 4000+ customersJoin an elite team with backgrounds from Airbnb, Palantir, Pinterest, IMC Trading, Shopify, LinkedIn, Microsoft, and more

Mercor’s platform team is looking for a Software Engineer in San Francisco or New York City. The focus is on building and improving the scalable software systems that support the company’s main products. Key responsibilities Design and develop software systems to help the platform grow and stay reliable Add new features and refine existing ones to strengthen platform functionality Collaborate with engineering, product, and design teams to deliver solutions Location This role is based in San Francisco or New York City.

MidiHealth is seeking a Senior Software Engineer to join the Platform Engineering team. This hybrid role is based in the SF Bay Area and centers on building and enhancing the software that drives MidiHealth’s healthcare technology platform. The work contributes directly to improving patient outcomes through technology. Key responsibilities Design and develop software solutions for the core platform Collaborate with engineering, product, and cross-functional teams to deliver integrated features Support the reliability and scalability of the platform Location This position requires regular on-site work in the SF Bay Area as part of a hybrid schedule.

About AnthropicAt Anthropic, we are dedicated to developing AI systems that are not only safe but also interpretable and steerable. Our mission is to ensure that AI serves the best interests of our users and society at large. Our rapidly growing team comprises passionate researchers, engineers, policy experts, and business leaders, all collaborating to create beneficial AI technologies.About the Role:We are seeking skilled software engineers to join our Platform team. This team is responsible for building the essential foundations that enhance product development across Anthropic. We manage the infrastructure and systems that teams rely on for reliable and scalable deployment to both internal users and hundreds of thousands of external clients worldwide.In this role, you will independently define and scope complex, multi-month projects, fostering cross-organizational alignment in ambiguous problem areas. Your architectural decisions will significantly influence the way Anthropic develops and scales its products. You will collaborate closely with research teams to transform cutting-edge capabilities into market-ready solutions, ensuring a lasting impact on our platforms that serve both internal and external engineering teams.Multiple teams are actively hiring, and team assignments will be determined post-interview based on your skills, interests, and the needs of the organization. This flexible approach helps us align talented engineers with backend product initiatives where they can make the most significant impact and experience growth.Your Responsibilities:Platform Acceleration: You will enhance developer productivity for product engineers at Anthropic. This includes architecting and optimizing critical development infrastructure that fuels our AI product development, encompassing development environments, observability, and CI/CD pipelines. You will work closely with product teams to understand their workflows and eliminate friction points, resulting in a profound multiplier effect across the product organization, thus accelerating our mission.Service Infrastructure: You will build and maintain the core infrastructure that supports Anthropic's engineering efforts, ranging from service mesh and observability systems to deployment pipelines and shared libraries. Your contributions will empower product teams to construct and operate reliable services at scale, positioning you as a critical force multiplier within the company.Multicloud: You will develop and sustain the infrastructure that allows Anthropic to function seamlessly across various cloud providers, focusing on cloud-agnostic solutions that enhance our operational efficiency.

Join the Team at Bretton AIBretton AI stands at the forefront of artificial intelligence in the financial services sector, providing an essential platform that organizations like Robinhood, Mercury, and Gusto rely on to streamline critical tasks, including anti-money laundering and counter-terrorism efforts.With over $95 million raised from renowned investors such as Greylock, Y Combinator, and Thomson Reuters Ventures, we are located in the heart of San Francisco. Our talented team hails from prestigious companies including SpaceX, Google, Netflix, Stripe, and Plaid.Your RoleAs a Platform Engineer, you will be instrumental in constructing and maintaining the infrastructure that underpins our compliance solutions at scale. You will take charge of reliability, performance, and scalability across our core platforms.Your responsibilities will include designing Postgres schemas, optimizing queries, developing high-throughput services, orchestrating long-running workflows with Temporal, and ensuring we maintain a commitment to a remarkable 99.9%+ uptime for our clients who process thousands of cases daily.In this role, you'll produce backend code for production, design distributed systems, and manage the infrastructure that allows our product teams to deploy rapidly and efficiently.Key ResponsibilitiesDevelop APIs and services capable of managing thousands of concurrent requests.Create ingestion → assessment → delivery pipelines for our case management.Implement Temporal workflows to manage long-running, stateful processes.Design and refine PostgreSQL schemas and queries for compliance workflows.Oversee CI/CD, deployments, and infrastructure-as-code while enhancing observability through logging, tracing, and metrics.Troubleshoot slow queries, memory leaks, and race conditions in our production systems.What We're SeekingEssential Qualifications4+ years for Engineer / 6+ years for Sr. Engineer / 8+ years for Staff Engineer in backend or infrastructure roles.Strong understanding of systems fundamentals, including distributed systems, databases, APIs, and concurrency.Demonstrated production experience with live systems, including debugging, incident response, and participation in on-call rotations.

Aura is seeking a talented and experienced Senior Software Engineer, Platform to join our innovative team. In this role, you will be responsible for designing and implementing scalable software solutions that enhance our platform capabilities. You will work closely with cross-functional teams to ensure the delivery of high-quality software that meets the needs of our users.