Senior Software Engineer - Backend

Join our innovative team at Plaid as a Senior Backend Software Engineer. In this role, you will be responsible for developing scalable backend systems that empower our users and partners. Your expertise in backend development will help us enhance our platform's capabilities and deliver exceptional user experiences.

Join Aircall as a Senior Backend Software Engineer and play a pivotal role in shaping our backend systems. You will be responsible for designing and implementing scalable, reliable, and high-performance software solutions. Collaborate with cross-functional teams to develop innovative solutions that meet our customers' needs.

Join Duolingo as a Senior Backend Software Engineer and play a pivotal role in building scalable and innovative backend systems that enhance the learning experience for millions of users worldwide. Collaborate with cross-functional teams to design, develop, and maintain high-performance APIs and services that are critical to our platform's success.

Since our inception, we have revolutionized the approach to small-dollar loans, having provided over $1 billion in funding to more than 1.5 million customers, and issued over 4 million loans that have saved our clients more than $650 million.At Possible, we are developing an innovative consumer finance company that prioritizes helping our customers avoid debt rather than profiting from it. As a Public Benefit Corporation, our mission is to facilitate economic mobility in communities through affordable credit products designed to foster financial health for generations. Join the team that is turning our vision into reality.About the RoleWe are in search of a skilled Senior Software Engineer to bolster our engineering team. In this role, you will be responsible for designing, developing, and maintaining high-performance, reliable, and scalable services utilizing Java, the Spring Framework, gRPC, and GraphQL. As a senior member of the team, you will offer technical leadership, mentor junior engineers, and inspire innovation in your domain.

Senior Backend Software EngineerJoin Read AI's innovative Backend team as a Senior Software Engineer. In this pivotal role, you will be instrumental in designing, developing, and optimizing robust backend systems that fuel our AI-driven productivity platform. Engage in a dynamic, collaborative setting where you’ll deploy code weekly and make a substantial impact on millions of users.Complete your application with a Provn skills assessment.

Join Opendoor as a Backend Software Engineer focused on Pricing, where you will play a pivotal role in shaping the future of real estate transactions. You will leverage your technical expertise to develop and optimize backend systems that drive pricing strategies, ensuring our platform delivers accurate and timely information to our users.

About HiveHive is at the forefront of cloud-based AI technology, designed to enhance the understanding, searchability, and generation of content. We are proud to partner with some of the most innovative and renowned organizations worldwide. Our platform empowers developers through a suite of pre-trained AI models, which handle billions of API requests every month. Additionally, Hive provides ready-to-use software applications powered by our proprietary AI models and datasets, enabling transformative solutions across various industries, including content moderation, brand protection, sponsorship analysis, and context-driven ad targeting.With over $120M raised from top investors like General Catalyst, 8VC, Glynn Capital, Bain & Company, and Visa Ventures, Hive boasts a diverse workforce of over 250 employees across our offices in San Francisco, Seattle, and Delhi. We invite you to be part of the AI revolution!About the RoleTo realize our ambitious vision, we are expanding our team of exceptional engineers. We are seeking innovative developers who are eager to launch new products and features, can operate independently, and are enthusiastic about exploring new technologies. The ideal candidate possesses a strong background in building core services and web-based APIs from scratch, values the intersection of product and technology, and is skilled in writing clean, maintainable code.

Integrate develops program management software for complex hardware projects, serving organizations in deep tech sectors like aerospace, robotics, and autonomous vehicles. The platform connects vendors, customers, and partners to streamline collaboration across company boundaries. By reducing manual work and communication barriers, Integrate supports teams working on demanding technical challenges. The company addresses the unique needs of hardware development, where traditional software often falls short. Integrate's solutions focus on improving coordination and communication for both internal teams and external stakeholders, helping organizations innovate more quickly and reliably. Role overview The Senior Backend Engineer will focus on building and scaling the infrastructure layer of Integrate’s platform. This position centers on new development, not maintenance. The work involves tackling distributed systems challenges, large-scale data federation, and architectural design to support an expanding customer base. Engineers at Integrate collaborate closely, make decisions quickly, and value technical rigor. Experience with large-scale systems, such as cloud migrations, distributed data pipelines, microservices, or event-driven architectures, is especially relevant for this role. Key responsibilities Design and scale distributed backend systems that process high-throughput, real-time data with complex dependencies. Profile and debug Go and Rust services to resolve performance issues. Contribute to data federation architecture, including S3 integration, graduation pipelines, and downstream data services. Develop and refine gRPC service interfaces and REST/JSON APIs for both internal and external use. Work with SQL and NoSQL databases, focusing on schema design, query optimization, and ensuring data durability. Collaborate with platform engineers and technical leads on infrastructure decisions. Instrument, monitor, and debug production systems, including participation in on-call rotations, root cause analysis, and incident management. Tech stack Main development uses Go, with Python for tooling and data workflows. The stack includes gRPC, REST/JSON, GraphQL, PostgreSQL, NoSQL databases, and Kubernetes-managed infrastructure. Infrastructure as code is managed with Terraform. Location This position is based in Seattle, WA.

Aerovy is hiring a Lead Software Engineer focused on backend development at its Seattle Engineering HQ. This position guides a team in building and maintaining scalable backend systems. The work centers on strengthening software architecture and supporting fast, reliable responses to front-end requests. Role overview This lead engineer role involves close collaboration with cross-functional teams. The position shapes the design and delivery of new features and oversees the technical direction for backend projects. What you will do Direct and mentor a backend engineering team Design, develop, and maintain scalable backend solutions Work with other teams to define and deliver new features Focus on high performance and quality throughout the software lifecycle

About BRINC:At BRINC, we are revolutionizing public safety through an innovative suite of life-saving technologies. Our journey began with the creation of drones and ruggedized throw phones, specifically designed to navigate hazardous environments and facilitate communication for de-escalating critical situations. Today, we have expanded our focus to include the development and deployment of advanced 911 response networks, where drones are dispatched to emergency calls to provide real-time visual data, greatly enhancing safety and enabling effective responses. Our state-of-the-art solutions are currently utilized by over 600 public safety agencies across the United States, and we have successfully raised over $150 million from esteemed investors such as Index Ventures, Motorola Solutions, Sam Altman, Dylan Field, Mike Volpe, Alexandr Wang, among others. At BRINC, we are dedicated to attracting the finest talent globally to support our mission of empowering first responders to save lives.About this Role:We are on the lookout for a Senior or Principal Backend Software Engineer who will take charge of critical components of our software systems, actively contributing to the design, development, and optimization of our technology stack. In this role, you will collaborate closely with cross-functional teams, utilizing your technical expertise to deliver high-quality and scalable software solutions. This is a thrilling opportunity to be part of a dynamic startup environment and to make a substantial impact on the company's trajectory.Key Responsibilities:Drive the development of a scalable backend platform that underpins our global real-time services.Ensure that our platform remains secure, reliable, and high-performing.Construct and enhance our platform infrastructure and development tools.Rapidly prototype new projects and ideas to meet the needs of our customers and internal stakeholders.Collaborate with cross-functional hardware and autonomy teams to address challenges such as streaming and presenting live drone data in formats accessible to non-technical users.Qualifications:Bachelor's, Master's, or PhD in Computer Science or a related field, with 5+ years of experience in delivering high-quality code and developing robust infrastructure. Note - we are open to candidates for mid-career, senior, and principal positions.Proven experience in building backend platforms, from infrastructure to API level (bonus points for experience in real-time data platforms, scalable microservice architectures, and handling security and encryption requirements).Familiarity with modern cloud infrastructure (AWS, GCP, Azure, etc.) is highly desirable.

JOIN DURANTA: A PIONEER IN GEOSPATIAL ANALYSISAt Duranta, we are dedicated to cultivating a more beautiful world through advanced geospatial data analytics. Our innovative platform empowers contractors to design, install, and maintain stunning outdoor spaces via seamless workflows.We are on the lookout for a Senior Backend Engineer to become a vital part of our dynamic team. In this role, you will lead the backend development for both our web application and mobile applications. Your focus will be on creating an optimized system where performance is paramount, ensuring a flawless user experience where every millisecond counts.

About HiveHive stands at the forefront of cloud-based AI innovation, delivering unparalleled solutions that facilitate understanding, searching, and generating content. Trusted by some of the most prominent and pioneering organizations globally, we empower developers with an extensive suite of premium, pre-trained AI models that handle billions of API requests monthly. Our turnkey software applications, driven by proprietary AI models and datasets, unlock transformative use cases across various industries. Hive's offerings are revolutionizing content moderation, brand safety, sponsorship analytics, contextual advertising, and more.Having successfully raised over $120 million from esteemed investors such as General Catalyst, 8VC, Glynn Capital, Bain & Company, and Visa Ventures, we are a growing family of over 250 dedicated professionals across our offices in San Francisco, Seattle, and Delhi. If you are passionate about shaping the future of AI, we invite you to join us!About the RoleTo fulfill our ambitious vision, we are expanding our team of exceptional engineers. We seek talented developers who are eager to launch innovative products and features into production, who thrive in autonomous environments, and who embrace the challenges that come with scaling solutions. Our ideal candidate will have a proven track record in building core services and web-based APIs from scratch, demonstrating a strong commitment to both the product’s functionality and the underlying technology. You should possess the ability to structure and write clean, maintainable code, ensuring robust software development practices.

About Pinterest Pinterest helps millions of people find inspiration, try new ideas, and create lasting memories. The team’s mission is to inspire individuals to build a life they love, and that starts with the people behind the platform. Team members enjoy flexibility in how and where they work, supported by PinFlex. Pinterest values unique perspectives and encourages growth, innovation, and personal development throughout your career. AI plays a central role at Pinterest, serving as a partner to boost creativity and impact. Candidates interested in this technology are encouraged to apply. The interview process will explore foundational engineering skills and collaboration with AI. Pinterest asks candidates to share their problem-solving approach and thought process. More details about the company’s approach to AI in hiring can be found here. Role Overview: Backend Software Engineer II Pinterest is looking for curious and adaptable Backend Software Engineers to join the Core and Monetization engineering teams in San Francisco, CA or Seattle, WA. This role involves close collaboration with product managers, designers, and other engineers to shape new technologies and user experiences. Backend Software Engineers at Pinterest build frameworks and features that support both developers and end users. The work includes designing creative solutions to complex technical challenges and supporting ambitious projects from initial concept through technical design, implementation, and launch.

About AnthropicAt Anthropic, our mission is to design AI systems that are reliable, interpretable, and steerable. We aim to ensure that AI technology is safe and advantageous for both our users and society as a whole. Our rapidly expanding team consists of dedicated researchers, engineers, policy experts, and business leaders collaborating to create beneficial AI systems.About the Role:We are in search of seasoned, product-oriented Software Engineers to take ownership of the backend systems that enhance user experiences across our API, Claude Code, and Claude.ai. In this role, you will independently define complex, multi-month projects within ambiguous problem domains and guide your peers in making technical and product-related decisions. You will align with product management, engineering teams, and research to identify capability gaps and translate cutting-edge model advancements into deployable products. Your architectural decisions will significantly impact the reliability and scalability of systems serving hundreds of thousands of global users, including internal teams, while you remain actively engaged with the code and our models.We are currently hiring for multiple teams. Team assignments will be made post-interview, considering your preferences and experience alongside organizational requirements. This flexible approach allows us to pair talented engineers with backend product initiatives where they can make the most significant impact and experience the most growth:API Core: You will develop and enhance the foundation of the Claude API—systems that deliver Claude's intelligence to developers ranging from startups to large enterprises. You will manage the performance, reliability, and efficiency of our core serving path, ensuring users derive maximum speed and value from our models. Collaboration with inference and safeguards will be key to optimizing the entire stack.API Capabilities: You will empower developers by integrating frontier model capabilities into the Claude API, overseeing core features such as vision, tool usage, and computer interaction. Your responsibilities will include launching new models and delivering the building blocks that enhance Claude's capabilities with each release, working directly with research and inference to productionize future advancements.API Knowledge: Your focus will be on transforming Claude into a true knowledge worker by ensuring the model has timely access to the right information. You will facilitate secure data access for developers, enabling Claude to automatically process and retrieve relevant data as needed.

Join finvari as a Senior or Staff Backend Engineer and be a pivotal part of our innovative team. In this role, you will design and implement scalable server-side solutions, contributing to the development of cutting-edge financial technology products. You will collaborate with cross-functional teams to deliver high-quality software that meets the needs of our clients.

Join Our Team as a Senior Backend Engineer (Golang & AI Automation)Location: Seattle, WA (Hybrid) or Remote (US-based) Job Type: Full-time Salary Range: $140,000 – $180,000 / yearAbout the Opportunityeqltech is proud to partner with an innovative seed-stage startup in Seattle that is revolutionizing the workplace with advanced automation solutions.Picture a future where intricate workflows are simplified through the mere act of screen recording. Our client is creating the technology that transforms video inputs into dynamic, automated workflows powered by cutting-edge AI.This position offers a unique

Join Aerostrat as a Senior Backend Engineer where you will play a pivotal role in developing robust, scalable backend systems. You will collaborate with cross-functional teams to deliver innovative software solutions that drive our business objectives. This position is perfect for someone who is passionate about technology and eager to contribute to high-impact projects.

Join our dynamic engineering team at Pinterest, where creativity meets technology! As a Software Engineer I focusing on backend development, you will play a pivotal role in enhancing our platform's capabilities and ensuring a seamless experience for our millions of users. Collaborate with cross-functional teams to design, implement, and optimize backend services that power some of the most innovative features on Pinterest.

Coupang is a leading name in South Korean e-commerce, known for dependable service and rapid innovation. With offices in Mountain View and Seattle, the company blends a startup’s drive with the backing of a global public organization. The culture supports both individual growth and strong teamwork. Initiative is valued at Coupang. Team members often launch new projects and play a direct role in shaping the company’s direction. Entrepreneurial thinking is encouraged, and those who drive improvements are recognized for their impact on both personal and company development. Coupang’s ambitions reach beyond standard commerce. The company regularly tackles challenging projects, always looking for new ways to improve technology and customer experience. Role overview The Senior Staff Backend Engineer will be part of the Application Infrastructure team. This group is responsible for building and enhancing complex workflow systems that power Coupang’s core services, including the rocket delivery platform. Their work supports systems that manage hundreds of millions of dollars in revenue. What you will do Design and develop a new, scalable workflow service from the ground up Make workflow development easier for domain teams Ensure the infrastructure can support growing business demands Help shape a critical system at the center of Coupang’s operations