Backend Engineer - Data Systems and APIs

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.

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

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.

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.

Join Rubrik, Inc. as a Senior Software Engineer specializing in API Infrastructure. In this role, you will play a pivotal part in designing and developing robust and scalable APIs that empower our cloud data management solutions. Your expertise will help shape the future of our platform, driving innovation and enhancing our product offerings.

The OPPO US Research Center is on the lookout for a skilled and passionate Backend Engineer to become an integral part of our expanding team. In this crucial position, you will play a significant role in designing, developing, and maintaining robust and scalable RESTful APIs that are fundamental to our generative AI-enhanced Android applications. Your primary focus will be working with platforms such as Google Cloud or Azure, enabling cutting-edge AI capabilities to be delivered directly to users’ mobile devices. This role presents a unique opportunity to create essential services that will shape user interactions with AI on mobile platforms, guiding projects from conception through to deployment.

Join a Pioneering CompanyAt Palantir, we are at the forefront of technology, creating innovative software solutions that transform data into actionable insights. Our platforms empower organizations to make critical decisions that save lives, optimize supply chains, and solve complex challenges.Your RoleAs a Systems Engineer within Palantir's Technical Operations team, you will be a key player in shaping our business processes and decision-making frameworks. Your responsibilities will include designing, implementing, and maintaining the core infrastructure that supports Palantir's operational success, encompassing financial reporting, sales management, and human resources. You will collaborate with both internal teams and external partners to tailor industry-standard tools to meet the evolving demands of our organization, while also enhancing our utilization of Palantir Foundry and AIP for internal applications.In this dynamic position, you will leverage your technical expertise to provide strategic guidance to stakeholders. Your typical day may involve assessing new technological solutions, aligning tech initiatives with business objectives, addressing urgent system challenges, and collaborating across departments to drive system enhancements. Success in this role requires adept management of multiple business systems and a flexible approach to adapt to changing requirements and complex issues as they arise.

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.

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.

Role Overview:Join us as a Backend Software Engineer at nace.ai, where you will play a critical role in crafting, deploying, and maintaining the comprehensive infrastructure for our cutting-edge AI systems. Your primary focus will be on designing resilient backend services, developing intuitive and high-performance user interfaces, and ensuring the flawless integration of LLM-based AI Agents. Your contributions will effectively bridge frontend user experiences with backend scalability and core AI infrastructure, significantly enhancing system efficiency, reliability, and user-facing functionalities.Key Responsibilities:Design, develop, and maintain scalable full-stack components, encompassing both frontend applications (utilizing frameworks such as React, Vue, or Angular) and robust backend services (using Python, Go, or Node.js).Create and implement APIs and data pipelines that enable seamless deployment and interaction of advanced AI Agents along with large-scale data processing workflows.Contribute to the evolution of core AI agent frameworks, focusing on essential features like tool integration, memory systems, and planning/orchestration modules.Develop and implement methodologies for evaluating AI Agents to rigorously assess, benchmark, and monitor agent performance, reliability, and safety in live environments.Oversee and optimize cloud infrastructure (e.g., AWS, GCP, Azure) to ensure high availability, cost-effectiveness, and scalability for both application layers and the underlying AI compute resources.Engage actively in design discussions, code reviews, and cross-functional collaboration to deliver high-quality, production-ready solutions across the entire tech stack.

This is a hybrid position based in our Palo Alto office, requiring in-office attendance on Tuesdays and Thursdays.Why This Role Stands Out?Join a rapidly expanding team at Grindr, where our user base has surged by 30% in the past year! We are in search of a seasoned Backend Engineer who is enthusiastic about building, testing, and deploying robust features alongside our Product team. This is your chance to tackle intriguing challenges, engage with cutting-edge technologies, collaborate with a talented team, and make significant contributions.Key Responsibilities:Become an integral part of a backend team of over 10 engineers, focusing on vital features that cater to millions of active daily users.Lead projects and mentor fellow engineers in implementing new functionalities while closely collaborating with product and design teams.Take ownership of designing and developing Grindr’s backend services within a stable and scalable microservices architecture.Work closely with Product Managers, Designers, and fellow Engineers to refine feature design and functionality.Enhance Grindr's platform using tools such as Redis, Postgres, and Kafka on AWS services.Drive innovation through data-informed decisions regarding new technologies, architectures, and workflows.Ensure high availability of Grindr’s platform by utilizing distributed systems and infrastructure engineering, while playing a pivotal role in optimizations, cost reduction, and incident management.Guide and mentor team members through pairing sessions, code reviews, and architecture discussions.What We Value in You:A minimum of 7 years of experience as a Software Engineer with a focus on Backend Systems (Service APIs, Data Processing, Messaging Services).Proven experience in designing and implementing large-scale systems for high load and data consistency within a microservice architecture.Expertise in designing systems that leverage Cloud Services, preferably AWS.A strong passion for software and system testing.In-depth understanding of concurrency concepts and associated trade-offs.A natural curiosity for troubleshooting and comprehending systems end-to-end.

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.

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.

Join mindrobotics as a Data Engineer, where you will play a pivotal role in developing the data systems that drive large-scale AI training for robots. This position is centered around transforming extensive data into well-organized, high-quality datasets. You will take ownership of data pipelines, labeling workflows, storage, and cloud infrastructure from start to finish. If you thrive in scaling environments, enjoy creating bespoke tools when existing solutions are inadequate, and aim to enhance data reliability for rapid iteration, you'll find a welcoming home here. Collaborate closely with researchers and engineers to ensure that our data propels swift and impactful advancements in robot training and evaluation.

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

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.