Senior Backend Software Engineer

About AppLovinAppLovin develops innovative technologies that empower businesses of all sizes to engage with their ideal customers. Our comprehensive software and AI solutions enable companies to expand, monetize, and connect with their global audiences. For more about us, visit: www.applovin.com.To fulfill our mission, we have assembled a diverse global team…

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.

Role Overview Pylon is hiring a Backend Engineer focused on API development in Palo Alto. This role centers on designing, building, and improving APIs that support our services and applications. What You Will Do Create and maintain APIs to power new and existing features Work with teams across engineering, product, and design to ensure APIs integrate smoothly Optimize API performance and reliability as our products grow Support project goals by contributing technical expertise in backend systems

Backend Software EngineerConfluera is an innovative cybersecurity startup backed by Series B funding, dedicated to safeguarding the cyber landscape. Our mission is to fortify enterprises today to ensure a more secure tomorrow. We provide a comprehensive solution that enhances visibility across cloud environments, empowering cybersecurity leaders with real-time attack prevention capabilities.Key Responsibilities- Design and construct distributed systems capable of processing vast amounts of data.- Develop, maintain, and optimize APIs and systems for scalable product enablement.- Create advanced models and features to improve anomaly detection accuracy.- Collaborate and communicate effectively with Product, Design, and Engineering teams.- Rapidly develop and iterate on solutions while upholding high-quality standards.Required Qualifications- Proficiency in programming languages such as Java and Python.- Experience with streaming platforms like Kafka.- Familiarity with stream processing frameworks, including Spark.- Understanding of distributed systems architecture.Preferred Qualifications- Prior experience working with streaming and stream processing systems (Kafka, Spark, etc.).- Knowledge in building ETL pipelines.- Experience delivering and maintaining large-scale production systems.- Leadership experience in technical projects.Educational Background- A Bachelor's or Master's degree in Computer Science, Computer Engineering, or a related field, or equivalent professional experience.

Our VisionAt Tinder, we believe in the excitement of forging new connections. Our mission is to keep the spark of human interaction alive, empowering millions across the globe to discover meaningful relationships. With a community of tens of millions of users, hundreds of millions of downloads, over 2 billion swipes, and more than 20 million matches daily, our influence spans across 190+ countries and is continually expanding.We collaborate to tackle intricate challenges. Beneath the surface simplicity of each match lies a profound exploration of human relationships, behavioral science, AI and ML, safety online and offline, cultural diversity, and the complexities of love and connection.Internship DurationThis internship will take place from June 1 to August 28, 2026.Work EnvironmentThis is a hybrid position that requires in-office collaboration three days a week in either Los Angeles or Palo Alto, California.Role OverviewAs a Backend Engineering Intern at Tinder, you will work closely with experienced engineers, contributing innovative solutions to enhance our backend infrastructure. We are committed to refining our architectural design and adopting cutting-edge technologies to continually evolve our application and redefine how people connect globally.

Role Overview Pylon is looking for a Backend Engineer focused on integrations to help expand connections with a range of platforms. This role centers on designing and building backend systems that support seamless integrations and reliable data flows. What You Will Do Develop backend solutions that enable integrations with external services and platforms Collaborate with teams across engineering, product, and other functions to deliver integration features Contribute to the stability and scalability of backend services that support Pylon’s business Location This position is based in Palo Alto.

About the Role Pylon is looking for a Backend Engineer focused on Underwriting to help build and improve backend systems that support our underwriting operations. This position is based in Palo Alto. What You Will Do Work closely with teams across the company to design, implement, and refine backend systems for underwriting Develop solutions that prioritize scalability and efficiency Align backend architecture with Pylon’s business objectives

xAI Inc. develops AI systems aimed at deepening understanding of the universe and supporting learning. The team operates with a focus on engineering quality, open knowledge sharing, and direct contributions. Initiative is encouraged, and leadership grows from consistent, high-quality work. Clear communication, a strong work ethic, and effective task prioritization are core values. Role overview The Backend Engineer - API will build and maintain scalable, reliable production infrastructure for xAI’s backend systems. The primary backend stack uses Rust, and experience with compiled languages such as Rust, C++, or Go is especially valued. What you will do Design and operate production infrastructure that supports xAI’s backend systems at scale Work with Rust (preferred), C++, Go, or similar compiled languages Share technical insights and collaborate closely with teammates Tackle engineering challenges proactively and take ownership of solutions Prioritize tasks and deliver results independently Requirements Experience designing and operating scalable production infrastructure Hands-on knowledge of Rust, C++, Go, or similar compiled languages Strong communication skills Proactive problem-solving and ownership mindset Ability to prioritize and work independently Location This position is based in Palo Alto, CA.

About xAIAt xAI, we are dedicated to developing artificial intelligence systems that can profoundly comprehend the universe and support humanity's quest for knowledge. Our dynamic team is small yet highly driven, committed to engineering excellence. We seek individuals who are eager to challenge themselves and thrive on curiosity. With a flat organizational structure, every team member plays an essential role in contributing to our mission. We value initiative, consistent excellence, strong work ethic, and effective prioritization skills. Additionally, strong communication skills are paramount, as team members must share knowledge concisely and accurately with one another.About the RoleThe xAI Tooling team, also known as Starfleet, is in search of a backend engineer who will play a critical role in designing, developing, and maintaining robust and scalable backend systems. These systems will empower our researchers, engineers, and product teams to build, experiment with, and deploy cutting-edge AI models and applications more efficiently. You will take ownership of high-impact tooling projects, including internal APIs, data pipelines, orchestration layers, and tooling platforms that enhance workflows for training, inference, evaluation, and deployment. If you are passionate about creating foundational tools that accelerate the development of the world's most powerful AI systems, this role offers a unique opportunity to make a significant impact at the forefront of AI innovation.

Company OverviewAt Flow, we are redefining the essence of living, working, and connecting. Flow transcends traditional real estate; we are a dynamic brand, a cutting-edge technology platform, and a comprehensive operational ecosystem that encompasses condominiums, hotels, multifamily residences, and office spaces. Our vision is to create a new living experience that is adaptable, interconnected, and designed to foster authentic community and significant value for our residents.Our mission revolves around the concept of oneness: prioritizing the needs and experiences of our residents while nurturing connections with their neighbors and the natural environment. By placing people at the heart of everything we do, we are cultivating vibrant, human-centered communities where life, work, creativity, and leisure harmoniously coexist.Position SummaryAs a Senior Backend Software Engineer at Flow, you will play a pivotal role in developing robust backend systems to support our expanding operations. You will collaborate with cross-functional teams to design and implement secure, scalable, and resilient services. This position requires a proactive approach to problem-solving, a keen eye for optimization, and a strong sense of ownership over your work.We believe that collaboration enhances success. All roles at Flow require an onsite or in-office presence.

Whop is building a unified platform for payments, business launches, and networking, serving individuals and enterprises in over 144 countries. The company processes more than $3 billion in annual payouts and continues to grow rapidly, backed by major investors such as Insight, Bain Capital Ventures, A*, Peter Thiel, and Tether. The team includes experienced entrepreneurs and product leaders from Meta and Robinhood. This Backend Engineer position centers on the Ads Pixel team in Palo Alto, CA. The role focuses on building and maintaining the systems that power Whop’s business growth by ensuring accurate, real-time data flows between Whop, business owners, CRMs, and advertising networks. What you will do Manage and expand the event pipeline that sends Whop’s first-party conversion data to integrated ad platforms and CRMs. Design and build new data destinations, handling authentication, schema mapping, identity matching, deduplication, retries, and backfilling. Improve match rates by advancing identity resolution, hashing, and normalization processes. Increase observability to track event delivery, matching, and attribution across conversions and destinations. Work closely with the ad networks team to connect ad spend with results. Requirements 5+ years in a software development role. Comfortable working in a startup setting where information may be incomplete. Strong curiosity and a drive to improve the product. Proven ability to ship fast, reliable software with close attention to detail. Experience in backend engineering, especially with data pipelines and real-time data processing. Learn more about Whop at whop.com.

About AppLovinAppLovin is dedicated to developing cutting-edge technologies that empower businesses of all sizes to effectively reach and engage their target customers. We offer comprehensive software and AI solutions designed to foster audience growth and monetization on a global scale. For further details about AppLovin, please visit: www.applovin.com.Our mission is supported by a diverse global team, bringing together various life experiences, backgrounds, and perspectives that align with our developers and customers worldwide. At AppLovin, we prioritize building a strong team and culture, actively seeking exceptional candidates who uplift and support one another.Recognized by Fortune as one of the Best Workplaces in the Bay Area, AppLovin has also been honored as a Certified Great Place to Work for four consecutive years (2021-2024). Discover more about our accolades HERE.A Day in the LifeJoining our backend software engineering team means tackling technical challenges like enhancing and implementing advanced software infrastructures. Our team is responsible for developing a high-performing, globally distributed ecosystem platform that serves as the backbone for the swift creation of innovative systems, enhancing our existing ecosystem.Our backend systems process billions of requests daily, operating on our mediation platform that underpins our header bidding solution, and we focus on creating high-availability, low-latency systems distributed across multiple data centers.The Impact You’ll MakeDesign, develop, and maintain large-scale distributed systems.Collaborate with multiple engineering teams to address a variety of technological challenges.Work closely with our product team, contributing to and shaping the roadmap of our products and technologies.Inspire and mentor fellow team members.Who You ArePossess 0-2+ years of experience with a minimum of a BS and/or MS in Computer Science or a related field.

Join a Transformative CompanyPalantir Technologies is at the forefront of developing cutting-edge software that enables organizations to make data-driven decisions and streamline operations. Our innovative platforms empower partners to tackle significant challenges, such as developing lifesaving medications, predicting supply chain interruptions, and locating missing persons.Role OverviewAs part of Palantir's defense product division, you will contribute to mission-critical applications designed for modern military operations. Our products facilitate secure data integration and visualization, allowing for the creation of complex systems, including common operating pictures, alert triaging systems, and resource allocation tools powered by advanced machine learning models. These tools are essential for daily operations in military command centers and on the battlefield, relied upon by our global clientele.As a Backend Software Engineer at Palantir, you will play a pivotal role in reshaping how organizations harness data. You will engage in every phase of the product lifecycle, from conception and design to prototyping and deployment. Collaboration is key; you will work alongside both technical and non-technical team members to grasp our clients' challenges and develop effective solutions. We promote inter-team mobility to foster the sharing of insights, skills, and experiences, allowing you to expand your knowledge across various technologies and product facets. You will work autonomously, making independent decisions while being supported by a community that encourages your growth as a technical contributor and engineering leader.Your daily tasks will be dynamic, adjusting to user demands and technical challenges. One day, you might join forces with fellow engineers to design a new system that supports a unique workflow; the next, you could be optimizing performance for low-latency operational requirements.Our Product Development teams consist of small groups of Software Engineers, each dedicated to specific product aspects, collaborating to enhance user workflows and continuously improve our software's efficiency and reliability.We are seeking passionate engineers eager to tackle real-world challenges and empower developers and end-users to maximize their productivity. If you are driven to create reliable, high-performance, and scalable systems while designing robust APIs and components, we encourage you to apply.

Join Protegrity, a trailblazer in data protection, as we harness the power of AI and quantum-resistant cryptography to revolutionize data security across diverse environments including cloud-native, hybrid, on-premises, and open-source systems. By utilizing cutting-edge cryptographic techniques such as tokenization, format-preserving encryption, and quantum-resilient methods, we aim to make sensitive data not only secure but also accessible and trustworthy.At Protegrity, you will collaborate at the forefront of innovation, making significant contributions to the industry while working with a team of exceptional professionals. Together, we are reshaping the future of data security, empowering organizations to flourish in a GenAI landscape where data is the most valuable asset. If you are prepared to influence the future of data security, Protegrity welcomes you.We are seeking an experienced, motivated, and inquisitive DevOps Software Engineer with expertise in backend API development, microservices deployed on Kubernetes, Generative AI (GenAI), and Large Language Models (LLMs). A strong dedication to data security, privacy, and safety is essential - WE WANT YOU!In this role, you will focus on the integration and maintenance of GenAI backend microservices within Kubernetes, developing and maintaining engineering solutions for products that ensure the safe and secure use of GenAI by our customers.

Join our innovative team at vinci4d as a Backend Engineer specializing in Data Systems and APIs. In this role, you will play a crucial part in designing, implementing, and maintaining robust data systems that power our applications. You will collaborate with cross-functional teams to build scalable APIs that enhance user experiences and support our mission to deliver cutting-edge technology solutions.

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.

About Glean:Established in 2019, Glean is a pioneering AI-driven knowledge management platform that empowers organizations to swiftly discover, organize, and disseminate information within their teams. By seamlessly integrating with platforms such as Google Drive, Slack, and Microsoft Teams, Glean ensures that employees can access essential knowledge when they need it most, enhancing productivity and collaboration. Our state-of-the-art AI technology streamlines knowledge discovery, enabling teams to leverage their collective intelligence more effectively.Glean was envisioned by Founder & CEO Arvind Jain, who recognized the challenges employees encounter in locating and comprehending information at work. Witnessing the fragmentation of knowledge and the proliferation of SaaS tools that hindered productivity, he embarked on a mission to create an AI-powered enterprise search platform that facilitates quick and intuitive access to necessary information. Glean has since transformed into the premier Work AI platform, merging enterprise-grade search functionality, an AI assistant, and robust application and agent-building features to revolutionize the way employees work.About the Role:We are seeking innovative engineers to take ownership of and launch engaging user-facing features. In the dynamic environment of a rapidly growing startup, this role involves collaborating with product managers and designers to strike the perfect balance between engineering constraints and user requirements, ultimately delivering seamless experiences across modern mobile and desktop browsers.Your Responsibilities:Manage the full lifecycle of your greenfield features from conceptualization through implementation, experimentation, and launch.Transform the current user experience by integrating AI capabilities into the product.Provide guidance and mentorship to junior engineers.

At Ascend, we are dedicated to transforming the data engineering landscape into an enjoyable and efficient experience. Our goal is to empower our clients by simplifying and accelerating data delivery, allowing them to focus on bringing their data innovations to fruition.As a vital member of Ascend’s backend engineering team, you will be responsible for designing, implementing, and scaling various microservices that form the backbone of the Ascend platform. You will harness your expertise and curiosity while collaborating with the most advanced big data and infrastructure platforms available. We cultivate a team-oriented environment, valuing individuals who excel in diverse fields, share knowledge generously, and thrive in a setting where they are challenged intellectually.

*This role supports hybrid in-office US-based work in San Francisco - Bay Area, New York, and Seattle.About Wealthfront EngineeringAt Wealthfront, we foster a culture of continuous learning and innovation, focusing on delivering high-quality software solutions. Our primary strategy revolves around automation, enabling us to enhance the financial services we provide to our clients.Our software automatically manages various financial processes, learning from data as we strive for improvement. Wealthfront engineers operate as builder/operators, taking full responsibility for both the development and operational maintenance of our systems, with an emphasis on automating any repetitive tasks.We prioritize automation in our development processes; for instance, all testing is automated — manual testing is not part of our software lifecycle. Additionally, we ensure observability in case of failures, with systems that notify engineers about issues, allowing us to maintain healthy operations.If you are passionate about working in a dynamic engineering environment where your contributions can significantly impact the company's success, especially in a tight-knit team of around 250 employees, with half in engineering, we encourage you to apply!