OCaml Backend Developer

Ahrefs is seeking a talented backend developer who possesses a profound understanding of networks, distributed systems, and operating system fundamentals, along with a passion for creating simple yet efficient architectural designs. Our backend infrastructure is predominantly built using OCaml, complemented by some C++ code.In this challenging role, you will…

Role overview Speechify seeks a Senior Software Engineer to join the Core Experiences team in Palo Alto, CA. The focus of this position is to build and enhance audio-driven features that allow users to get more value from the platform. What you will do Collaborate with fellow engineers to design, develop, and maintain applications supporting Speechify’s main features. Create solutions aimed at boosting performance and responsiveness throughout the platform. Offer technical insight and ideas to influence the ongoing evolution of the user experience. Location This role is based in Palo Alto, CA, USA.

About WhopWhop is a pioneering financial technology firm dedicated to empowering individuals and businesses with sustainable income solutions. Our ambition is to build the largest online marketplace, enabling seamless creation, connection, and transactions on a unified platform. With over $3 billion in annual payouts across 144 countries, Whop is rapidly growing, boasting a gross transaction volume increase of approximately 25% month-over-month.Having attracted substantial investments from leading firms such as Insight, Bain Capital Ventures, A*, and Peter Thiel, we are well-positioned for continued expansion, including a recent strategic investment from Tether, the world's largest stablecoin company.Our team comprises dynamic and passionate entrepreneurs, with over 75% having launched businesses before joining Whop, including 53 former founders and 30 who have scaled to over $1 million in revenue. Our product leadership team includes veterans from Meta and Robinhood.To learn more, please visit whop.com.About the RoleThe Payments team is responsible for crucial product features that facilitate global payments for merchants using our platform. As a Payments Engineer, you will develop systems that manage high-volume checkout processes and ensure secure and efficient payment collection, identity verification, balance management, and fund transfers. We prioritize reliability and security in all our operations.What You’ll DoEnhance and optimize payment interfaces that process billions in transactions.Develop payment features and components that simplify integration for developers.Expand our payment capabilities by enabling additional payment methods for creators.Create high-quality developer documentation and interactive tools for users of our SDKs.Design intuitive APIs for seamless payment operations.Experiment with innovative solutions to enhance payment accessibility.

Senior Backend Software EngineerDepartment: Engineering | Location: Palo Alto HQ | Type: Full-time, On-siteAbout the RoleAt Pika, we are seeking a talented Senior Backend Software Engineer to play a pivotal role in enhancing our core infrastructure that supports our innovative products. You will be instrumental in the design and development of robust, scalable backend systems, overseeing everything from API design and service architecture to real-time messaging infrastructures and platform integrations. This is a high-stakes position where your decisions will directly influence the experiences of millions of users interacting with Pika.In this senior position, you will also elevate the team’s capabilities through architecture guidance, comprehensive code reviews, and mentoring opportunities for junior engineers.What You'll Do• Design and develop scalable backend services that drive Pika's web, mobile, and multi-platform offerings.• Manage backend logic from end-to-end, including database modeling, API design, infrastructure decisions, and ensuring production reliability.• Create and implement real-time systems, including WebSocket connections, event-driven architectures, and messaging queues for low-latency communication.• Optimize infrastructure to enhance throughput, reduce latency, and ensure reliability as Pika continues to grow.• Enhance internal tooling and automate operational processes to streamline team workflows.• Lead technical decisions by drafting RFCs, assessing trade-offs, and building consensus within the engineering team.• Mentor and guide engineers through code reviews, architectural advice, and collaborative programming sessions.• Troubleshoot, optimize, and future-proof systems to handle increased scale.What We're Looking For• A minimum of 5 years of backend engineering experience, specifically in building production services at scale.• Expertise in modern backend technologies (Node.js, Python, Go, etc.) and frameworks (Express, FastAPI, etc.).• A solid understanding of distributed systems, including event-driven architectures, message queues, and service-to-service communication.• Profound knowledge of database design and operations (SQL, NoSQL, data modeling, performance tuning).• Familiarity with APIs, cloud infrastructure (AWS, GCP), Kubernetes, and CI/CD workflows.• Experience in building real-time systems using WebSockets, long-polling, and pub/sub patterns.• Excellent debugging and observability skills; you can trace problems across services efficiently.• A proactive ownership mentality — you identify issues and implement solutions without waiting for specifications.• Strong communication skills and a collaborative mindset.Nice to Have• Experience with AI/LLM integration (model orchestration, token management, prompt routing).• Familiarity with multi-tenant SaaS platforms or multi-platform products.• Experience building internal tools or automation pipelines.• Previous experience in a startup environment, comfortable with ambiguity and rapid movement.

About xAIAt xAI, we are committed to developing advanced AI systems that accurately interpret the universe and support humanity's quest for knowledge. Our agile team is comprised of highly motivated individuals who prioritize engineering excellence. We welcome those who relish challenges and are driven by curiosity. Operating with a flat organizational structure, we encourage hands-on contributions from all team members to fulfill our mission. Initiative and a track record of excellence are recognized and rewarded. Strong communication skills are essential for effectively sharing knowledge within our team.About the RoleThe Imagine Product team is at the forefront of transforming AI-enhanced media experiences for Grok users globally. In this pivotal role, you will architect and scale robust, high-performance systems that facilitate engaging, multi-modal media interactions—utilizing state-of-the-art AI for the seamless generation, processing, and delivery of a variety of media formats including images, videos, and audio. Your contributions will enhance real-time user experiences that captivate millions, turning sophisticated multimodal models into production-ready features. If you are a passionate problem-solver with a keen interest in AI and media technologies, and are eager to create scalable solutions that influence the future of consumer AI, this is your chance to make a significant impact.

Join Artech Information Systems LLC as a Test Automation Developer, where you'll be instrumental in creating robust automated testing frameworks for our cutting-edge applications across iOS, Android, and Web platforms. You will collaborate with cross-functional teams to ensure the highest quality of our software products, enhance user experience, and contribute to continuous integration and delivery processes.

The Application Modernization Platform (AMP) team is addressing one of the industry's most significant challenges: harnessing Generative AI to modernize rigid, legacy applications into agile, microservices-based architectures utilizing MongoDB. We are developing a comprehensive SaaS-like platform that integrates both the "brain" (multi-agent reasoning and orchestration) and the "hands" (the deployment platform and modernization toolset). This solution demands a solid platform foundation and infrastructure tailored for a "build once, run anywhere" model, guaranteeing seamless operation regardless of client-specific security or network requirements. A crucial challenge lies in fine-tuning our tools for each customer's distinct tech stack and restrictive environments while ensuring they remain easily extensible and scalable for common application modernization challenges. We are in search of an engineering leader for this high-visibility initiative. This role involves defining the overarching strategy and technical direction across all AMP engineering pillars, spearheading the resolution of uniquely intricate application modernization challenges, and delivering a product of enterprise-grade quality. The leader will work to minimize deployment friction, meet compliance requirements, and contribute to the evolution of how global enterprises harness GenAI. The ideal candidate is a hands-on technical leader who excels in leveraging GenAI capabilities, architecting complex distributed systems, and designing orchestration agents that ensure the reliable and fluid execution of the entire software development lifecycle. We are particularly interested in candidates based in Palo Alto for our hybrid working model.

At SpaceX, we are driven by a singular vision: to create a future where humanity explores the cosmos. Our mission is to develop pioneering technologies that will enable life on Mars and beyond.SENIOR ASIC DESIGN ENGINEER (STARSHIELD)Join our Starshield program, which utilizes SpaceX's advanced Starlink technology to bolster national security initiatives. While Starlink caters to commercial and consumer markets, Starshield is specifically tailored for governmental applications, focusing on earth observation, secure communications, and hosted payloads.As a Senior ASIC Design Engineer on the Starshield team, you will engage in pioneering development projects that support U.S. National Security objectives. Your role will involve the design and implementation of cutting-edge FPGAs and ASICs for use in space and terrestrial infrastructures worldwide. You will thrive in a dynamic and collaborative setting, tackling unsolved challenges and embodying the SpaceX ethos of rapid iteration to transition from design to operational capability with unmatched speed.

Join Wealthfront as a Senior iOS Engineer and play a pivotal role in shaping our investment and cash account features within our iOS application. This position offers the flexibility of US-based remote work or a hybrid model in our Palo Alto, CA office. Collaborate within a dynamic, cross-functional scrum team to design, develop, and enhance features that empower our clients to build wealth on their own terms. In addition to app development, you will be responsible for writing comprehensive automated tests and integrating with our in-house design systems and backend API.

Join our innovative team at latitude as a Senior Software Engineer specializing in Machine Learning Offboarding Models. In this role, you will leverage your expertise in software engineering and machine learning to develop robust models that enhance our offboarding processes. Your contributions will directly impact our operational efficiency and improve user experiences.As a key member of our team, you will collaborate with cross-functional teams to design, implement, and optimize machine learning solutions. We seek a passionate engineer who thrives in a fast-paced environment and is eager to tackle challenging problems.

Senior Software Engineer, Infrastructure About Ladder At Ladder, we identified a significant issue in the life insurance sector: the lengthy application process, the excessive paperwork, and the numerous in-person meetings with agents. Motivated by personal loss, our CEO, Jamie, set out to simplify the process of obtaining essential coverage for families. We innovated real-time underwriting using AI, transforming the months-long life insurance application into a matter of minutes. Our user-friendly digital experience ensures instant decisions and has garnered exceptional user reviews, with over $74 billion in coverage issued. About the Role We are in search of a Senior Software Engineer who will enhance developer productivity within Ladder's engineering team. You will take charge of modernizing our CI/CD pipelines, build systems, and developer tools, while also contributing to the robustness of our cloud infrastructure and data platform. The ideal candidate will possess a proven track record in software engineering, demonstrate leadership qualities, and have a thorough understanding of engineering infrastructure. This position is remote, available in any of the 22 states where Ladder is hiring: AZ, CA, CO, CT, FL, GA, KS, MA, MD, MN, NC, NH, NJ, NV, NY, OH, OR, PA, TX, VA, WA, WI. Please note that Ladder is not sponsoring or transferring OPT or H1-B visas at this time. How You’ll Make a Difference As a senior engineer in our team, your responsibilities will extend beyond coding; you will influence our platform strategy. Your contributions will include: Enhancing developer velocity across the engineering organization by measuring and optimizing the developer workflow, which encompasses build times, test parallelization, deployment speeds, and daily tooling. Shaping the architecture of Ladder’s production infrastructure by evaluating design trade-offs and making impactful technical decisions, such as transitioning from custom monitoring tools to native cloud provider integrations or redefining data pipeline rebuild processes in response to upstream logic changes. You will have the insight to see the holistic view across systems and determine where to allocate engineering resources effectively. Engaging in incident response for infrastructure issues, leading retrospectives, and ensuring actionable follow-through on resolutions.

Role Overview RideAlso is seeking a Senior Software Engineer focused on mapping solutions in Palo Alto. This position centers on building and improving software that powers the company's mapping features, aiming to deliver a smooth and reliable user experience. What You Will Do Design and implement software to advance RideAlso's mapping capabilities Work closely with teams across disciplines to create scalable, maintainable architecture Apply current mapping technologies to solve real-world challenges Collaboration This role involves frequent collaboration with engineers, designers, and product managers to ensure mapping solutions integrate well with other RideAlso systems.

Join our dynamic team at Artech Information Systems LLC as a Test Automation Developer, where you will leverage your Python expertise to develop innovative automated testing solutions. Collaborate with cross-functional teams to enhance product quality and streamline testing processes. If you are passionate about technology and thrive in a fast-paced environment, we want to hear from you!

Join our dynamic team at Sonsoft Inc. as a Hadoop Developer! We are looking for an enthusiastic and skilled individual to help us leverage big data technologies to drive our business forward. You will be responsible for designing, developing, and maintaining scalable data processing solutions using Hadoop and its ecosystem tools.

Role Overview Pinterest is looking for a Senior Staff Software Engineer to join the Merchants team. This role focuses on building and improving features that support merchants and enhance the overall platform experience. What You Will Do Work closely with teams across engineering, product, and design to gather requirements and set technical direction. Design and implement scalable systems that support merchant needs and user engagement. Develop software solutions that help merchants connect with Pinterest users and grow their businesses. Contribute to the platform’s mission of inspiring creativity and discovery worldwide. Location This position is based in San Francisco, CA or Palo Alto, CA.

Rubrik, Inc. is hiring a Staff Software Developer focused on Enterprise AI at its Palo Alto, CA office. This position centers on designing and building advanced AI solutions for business operations and customer-facing products. Role overview This role involves developing AI-driven tools and systems that improve efficiency and support customer needs. The work directly influences the direction and impact of Rubrik’s AI initiatives. Key responsibilities Lead the creation and implementation of enterprise-scale AI solutions Collaborate with teams to identify opportunities for AI-driven improvements Contribute technical expertise to shape Rubrik’s future AI capabilities Location This role is based in Palo Alto, CA.

Join us in revolutionizing healthcare. At Qualified Health, we are pioneering the possibilities of Generative AI within the healthcare sector. Our advanced infrastructure establishes crucial guidelines for safe AI governance, tailored agent development, and real-time monitoring of algorithms, collaborating with prominent health systems to effect real change. This role transcends a mere job; it's a chance to forge the future of AI in healthcare, tackle intricate challenges, and create a meaningful impact on patient care. If you are driven, innovative, and eager to accelerate progress, we would be thrilled to have you on our team. Be part of shaping the future of healthcare.

Join our dynamic team at Sonsoft Inc. as a Hadoop Developer! In this role, you will be responsible for designing and implementing scalable data processing systems using Hadoop technologies. You will collaborate with data scientists and analysts to optimize data workflows and ensure the integrity and availability of large datasets.

About the RoleAt Pika, we're at the forefront of developing innovative tools for creators, enabling them to express their narratives effortlessly. Backed by over $135 million in funding and a dedicated team, our mission is to democratize video creation, making it accessible to all. We are seeking a skilled iOS Engineer to enhance our mobile initiatives as we expand our user base.What We’re Looking ForA minimum of 5 years of professional experience in designing and launching consumer-facing iOS applications.Expertise in Swift with a solid understanding of the iOS ecosystem, particularly SwiftUI.Experience in UI/UX design utilizing modern frameworks, showcasing a strong attention to detail.Demonstrated ability to contribute effectively to projects while maintaining high standards of design consistency, functionality, and performance.Strong problem-solving skills paired with a collaborative and team-oriented mindset.Preferred SkillsBackground in developing video or multimedia applications is highly desirable.Experience with social media and creative applications is an advantage.Familiarity with core animation, graphics, and media frameworks.What We OfferAttractive salary range: $175,000–$250,000, commensurate with experience and location.Equity in a rapidly growing startup that is shaping the future of video creation.Comprehensive health benefits package.An encouraging and cooperative office culture where we build and launch together.

Become a vital member of the OPPO US Research Center's dynamic team, where you will spearhead the development and enhancement of backend services for our high-traffic products, including the App Store, Global Search, and Game Center. Your contributions will ensure that millions of users enjoy a seamless experience every day. Key Responsibilities:Architect and develop backend services tailored for recommendation and search functionalities, prioritizing low latency and high availability.Utilize multi-level caching strategies and refine data access patterns for optimal performance.Construct, oversee, and fine-tune data pipelines and indices leveraging Redis, Elasticsearch, and Kafka.Write production-grade Java services utilizing Spring and Spring Boot, while collaborating on deployment strategies and incident management.Engage in cross-functional teamwork with Machine Learning Engineers, product managers, Site Reliability Engineers, and data specialists to drive feature implementation and improvements.