Senior Backend Software Engineer - Join Our Innovative Team

About Prima MenteAt Prima Mente, we are pioneering the integration of artificial intelligence with frontier biology. Our mission is to generate proprietary data and develop general-purpose biological foundation models that translate groundbreaking discoveries into tangible research and clinical outcomes. We are focused on understanding the complexities of the human brain, safeguarding it from neurological disorders, and enhancing cognitive health. With a dedicated team of AI researchers, experimentalists, clinicians, and operational experts, we proudly operate from our hubs in London, San Francisco, and Dubai.Position Overview – Senior Software Engineer, Backend & CloudIn this role, you will be responsible for designing, developing, and scaling SaaS solutions that make our biological foundation models accessible to end users. Your work will predominantly focus on backend (70%), followed by cloud (25%) and a small portion of frontend (5%).Your contributions will support:Managing extensive biological datasets with complex I/O and structured metadata.Tracking experiment lineage, artifacts, and model version histories.Implementing tenant-aware access controls and role-based permissions.Creating reproducible workflows that connect research code to production services.You will transform intricate model workflows into user-friendly, reliable, and observable products in production.Key ResponsibilitiesBackend & Application ServicesYou will engage with data models, invariants, and potential failure modes.Design and implement REST or gRPC APIs to support datasets, experiments, and user workflows.Define and adapt service boundaries as the system evolves.Design, migrate, and optimize schemas within an RDMS, preferably PostgreSQL.Implement authentication and authorization controls at the tenant level.Enhance performance, query efficiency, and data integrity.Add structured logging and metrics for efficient debugging.Cloud & InfrastructureYou will work directly with cloud resources, ensuring efficient deployment and operation.Deploy and manage services on AWS or GCP.Provision and configure computing, storage, and networking services.Set up IAM roles adhering to least-privilege access principles.Utilize Docker for service containerization.

Join Hive, a pioneering force in cloud-based AI solutions, as a Senior Backend Software Engineer. In this role, you will play a crucial part in our mission to deliver cutting-edge AI capabilities that empower hundreds of prestigious organizations worldwide. We are seeking passionate developers who thrive on transforming innovative ideas into scalable products and features. If you possess a strong foundation in building robust core services and web-based APIs, along with a commitment to writing clean, maintainable code, we want to hear from you!

At Crusoe, our mission is to propel the availability of energy and intelligence to new heights. We are developing the innovative engine that enables ambitious AI-driven creation without compromising on scale, speed, or environmental sustainability.Join us in the AI revolution with sustainable technology at Crusoe. You will play a pivotal role in fostering significant innovation, creating a real impact, and collaborating with a team that is leading the charge for responsible and transformative cloud infrastructure.Crusoe aims to be the world’s preferred AI-centric cloud infrastructure provider, crafting vertically integrated, purpose-built solutions trusted by Fortune 500 companies to support their most complex AI applications. We are redefining the landscape of AI cloud infrastructure, aligning the future of computing with climate sustainability. Our platform is recognized as the gold standard in reliability and performance, with data centers optimized for AI workloads powered by clean, renewable energy.About the Role:We are looking for skilled Staff Software Engineers to design, build, and scale the customer-facing platforms and services of Crusoe Cloud. The Cloud Customer Experience (CCX) team is dedicated to delivering a premier user experience for our AI-focused cloud platform. Your mission will be to ensure a seamless and intuitive user flow while maintaining backend reliability and scalability that distinguishes us from our competitors. You will focus on developing highly scalable and reliable services for authentication, user management, billing, usage, and more.Key Responsibilities:Design, develop, and maintain scalable and reliable services that enhance our cloud platform’s user experiences.Work collaboratively with cross-functional teams, including product and design, to assess tools, frameworks, and customer requirements, crafting innovative solutions that set Crusoe Cloud apart.Architect and build backend systems that support our cloud platform, encompassing everything from authentication flows to scalable and reliable access to infrastructure resources.Contribute to architectural decisions that enhance reliability and maintainability across the organization.Mentor fellow engineers, improve hiring practices, and contribute to fostering a robust, inclusive engineering culture.

About UsAt XOXO, we are a pioneering research lab dedicated to crafting intelligent interfaces that enhance everyday life. Our stealth team, comprising passionate engineers, designers, and researchers, is committed to solving unique challenges that affect life beyond the workplace.With recent advancements in our infrastructure, architecture, and model layers, we are seeking exceptional builders to create the interface and application layers that will turn our innovative vision into reality.About the RoleWe are looking for a skilled backend engineer to design, develop, and maintain high-quality production-grade backend systems. This position is ideal for a candidate with a strong foundation in cloud infrastructure, distributed systems, observability, and data persistence, where testing and stability are central to your approach.You will be responsible for overseeing backend projects from conception to production launch, ensuring a strong emphasis on performance, reliability, infrastructure efficiency, and security throughout the entire development lifecycle.What You’ll DoDevelop and manage backend services and distributed systems in a production environment using AWS or GCP.Architect data storage and retrieval systems utilizing a balanced combination of vector, OLAP, SQL, NoSQL, caching, and search technologies.Establish and maintain observability through monitoring, logging, tracing, and alerting to ensure system health and performance.Create and execute comprehensive test frameworks that address deployment and runtime failure scenarios.Lead backend projects from start to finish, focusing on complex feature development, CI/CD, Terraform implementation, stability, and security.

About WorkWhileAt WorkWhile, we are dedicated to empowering hourly workers to achieve financial stability and improved quality of life. With over 80 million Americans engaged in hourly employment, many face unpredictable schedules, low wages, and scarce benefits, which can lead to economic hardship.Our innovative platform is transforming the landscape of frontline work by fostering a more adaptable and effective labor market. Leveraging advanced AI technology, WorkWhile enables businesses to swiftly connect with top-tier talent. Workers enjoy same-day pay, complimentary telehealth services, opportunities for skill advancement, and the flexibility to select shifts that align with their expertise and personal schedules.Our ambitious aim is to harmonize incentives and address inefficiencies in the labor market, challenging the $650 billion staffing and recruiting industry. Supported by Khosla Ventures and celebrated by the Inc. 5000 for remarkable growth, WorkWhile is at the forefront of redefining the future of work.

Who Are We?Postman is the leading global API platform, utilized by over 45 million developers and 500,000 organizations, including 98% of the Fortune 500. We are dedicated to fostering an API-first world by simplifying every stage of the API lifecycle and enhancing collaboration, enabling users to build superior APIs more efficiently.Headquartered in San Francisco, Postman has offices in Boston, New York, Austin, Tokyo, London, and Bangalore—the birthplace of our company. We are a privately held organization, supported by investors like Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Discover more at postman.com or connect with us on X at @getpostman.P.S: We highly encourage you to read The "API-First World" graphic novel to gain insight into our vision at Postman.The OpportunityWe are seeking a talented Senior Backend Engineer to join our Cloud Platform team, where you will be instrumental in developing the core systems and services that drive Postman’s internal platform. You will design and implement new backend services responsible for deploying, scaling, and managing our infrastructure and product services, utilizing Java, Spring Boot, and Hibernate (JPA) alongside cloud-native technologies such as Kubernetes, ArgoCD, Istio, and Terraform.Your contributions will have a significant impact, as the systems you create will be employed across Postman engineering, enabling quicker delivery, improved scalability, and an enhanced developer experience. Additionally, you will have the chance to contribute to open-source projects, extending your influence beyond Postman’s ecosystem.What You’ll DoDesign and develop backend services in Java and Spring Boot to enhance Postman’s internal Cloud Platform.Architect new services for managing service deployment, lifecycle, and scaling across Kubernetes clusters.Implement GitOps workflows (ArgoCD) to facilitate continuous delivery.Integrate with cloud-native tools such as Istio, Helm, and Terraform.Adhere to robust software engineering practices, including testing, code reviews, CI/CD, and comprehensive documentation.Drive innovation by participating in open-source initiatives where applicable.Collaborate with Cloud Architects, DevOps engineers, and product teams to ensure alignment with business objectives.Ensure the performance, reliability, and scalability of the systems you develop.

At Plaid, we're reimagining the future of financial interactions. Join us in our mission to empower developers and enhance the financial lives of millions. As a Senior Backend Software Engineer, you will play a pivotal role in creating robust tools that streamline how users connect their financial accounts to various applications. Collaborate with industry leaders and contribute to a network that spans over 12,000 financial institutions across North America and Europe. You’ll be instrumental in driving innovation and excellence in our engineering practices while working alongside a talented team committed to making a real impact in the financial landscape.

Role Overview Sigma Computing builds a high-performance data platform aimed at making data accessible and useful. The engineering team focuses on modern data architecture and delivers features that help organizations explore and analyze data efficiently. As the team grows in San Francisco, Sigma is looking for a Senior Backend Software Engineer who enjoys solving complex problems and contributing to a product used by a wide range of users. What You Will Do Tackle challenging problems related to providing interactive experiences on data warehouses for exploration and analysis. Work with technologies including Rust, Go, GraphQL, Node, and Kubernetes. Build backend distributed services, design algorithms, and create APIs for a cloud-based application. Debug, track, and resolve product or system issues as they arise. Design and implement new backend features to support a growing user base. Participate in design and code reviews with teammates and stakeholders to maintain high standards and share knowledge. Location This position is based in San Francisco, CA.

Company BackgroundAt Specter, we are pioneering a software-defined control plane that enhances the safety and visibility of physical assets for American businesses. Our innovative approach leverages a robust hardware-software ecosystem built on advanced multi-modal wireless mesh sensing technology, drastically reducing the costs and time associated with sensor deployment.Our platform is set to revolutionize the way companies perceive their physical environments, enabling real-time visibility and management of operations. With a passionate team hailing from prestigious organizations such as Anduril, Tesla, Uber, and the U.S. Special Forces, we are committed to leading the charge in the rapidly evolving realm of physical AI and robotics.Role + ResponsibilitiesWe are on the lookout for a Backend Software Engineer to join our engineering team. In this role, you will be instrumental in designing, deploying, and scaling distributed systems that power our mother node base stations and cloud services. Your contributions will ensure the reliability, scalability, and performance of Specter’s sensing and perception platform across both edge devices and cloud infrastructure.Key responsibilities include:Architecting and operating distributed, Linux-based systems across edge and cloud environments.Designing scalable pipelines for streaming, storing, and processing vast amounts of video and sensor data.Building containerized services (Docker/Kubernetes) for the deployment of perception and inference workloads at scale.Developing observability systems for monitoring, logging, and alerting across our fleet of edge nodes and cloud infrastructure.Optimizing queue-based video ingestion, transcoding, and upload pipelines for reliability in bandwidth-constrained environments.Implementing highly available infrastructure for real-time alerting, APIs, and customer-facing event systems.Collaborating cross-functionally with hardware, perception, and application teams to ensure infrastructure supports rapid iteration and scalability.

Since the inception of aviation, pilots have consistently battled air resistance, akin to sailors managing the friction of water. Amid this ongoing challenge, the trim tab stands out as a brilliant yet understated innovation. Just as the wheel transformed land transportation by facilitating movement, the trim tab enhances flight, enabling smoother navigation through the skies. It exemplifies the beauty of simplicity in engineering, turning the demanding task of aircraft control into a more refined and manageable experience. At Mercury, we are dedicated to creating a remarkable banking experience for startups. Our team is deeply committed to ensuring our product not only satisfies but anticipates the evolving needs of our customers. Our product engineering team is expanding, and we are eager to bring on senior backend engineers. We are a group of practical, product-focused engineers driven by the desire to develop products that rescue our customers from the frustrations of outdated, costly industry tools. In this role, you will: Embrace a strong sense of product ownership and proactively seek responsibility—our team often self-organizes on small to medium-sized projects, and we are looking for someone enthusiastic about shaping and building the future of Mercury. Thrive in an autonomous environment with a close-knit team, embodying a “startup within a startup” culture. Collaborate closely with designers and product leaders to deliver delightful experiences, aiming to elevate the standard of banking and fintech software. Many of our customers are startups who value our sleek and intuitive designs. Join a team of seasoned product engineers within one of our Mercury product groups, such as Banking, Experiences, Expansion, or Risk.

HeartFlow Inc. seeks a Senior Backend Software Engineer in San Francisco, California. This role centers on designing and enhancing backend systems that power the company’s cardiovascular analysis platform. The technology supports both clients and clinicians, contributing to patient care in the medical field. Key responsibilities Build and improve backend software components for HeartFlow’s main platform Work closely with engineering, product, and clinical teams Support software quality and reliability for medical use Take part in solutions that aim to improve cardiovascular health outcomes Location This position is onsite in San Francisco, California.

At Julius, we are experiencing rapid growth, connecting with millions of knowledge workers. We invite a talented backend engineer to join our dynamic and highly skilled team, dedicated to transforming AI-powered code execution and data analysis.As a Senior Backend Software Engineer, you will take the lead in designing, implementing, and scaling the systems that drive our web and mobile applications.Your Responsibilities:Develop innovative products that integrate AI capabilities for millions of knowledge workers.Architect and enhance backend systems that support the core functionalities of Julius.Create robust interfaces between backend systems and web/mobile clients.Focus on scaling and load balancing of web server backends to meet evolving demands.Qualifications:Proficient in Python or a similar backend programming language.Extensive experience with database management, pooling, and concurrency.Familiarity with cloud services such as AWS, GCP, or Azure.Knowledge of infrastructure tools like Kubernetes and Terraform (or a desire to learn).Strong skills in designing extensible systems.Minimum of 2 years of engineering experience.Bonus: Experience with R programming language.Bonus: Prior work on AI side projects and interest in experimenting with LLMs.About Julius:Location: San Francisco, CA Type: Full TimeCompensation: Competitive base salary with significant equity options.Benefits: Comprehensive health and dental coverage, gym reimbursement, and daily team lunches.We are an innovative applied AI lab focused on creating coding agents. Our mission is to empower one billion individuals to become software creators, starting with data science and analysis applications. Our users include professionals from finance, operations, scientific research, and academia.

About Sprinter Health:At Sprinter Health, we are dedicated to transforming healthcare accessibility by delivering services directly to patients' homes. Approximately 30% of patients in the U.S. forgo essential preventive or chronic care due to transportation challenges, often leading them to the emergency room as their first point of contact with the healthcare system, resulting in over $300 billion in avoidable costs annually.Leveraging cutting-edge technologies that drive leading marketplace and last-mile platforms, we prioritize delivering care where it is needed most. To date, we have successfully assisted over 2 million patients across 22 states and conducted more than 130,000 in-home visits, boasting a remarkable 92 Net Promoter Score (NPS). With a team of skilled clinicians, technologists, and operators, we have raised over $125 million from esteemed investors such as a16z, General Catalyst, GV, and Accel, ensuring a strong multi-year runway for our initiatives.About the Role:We are seeking an experienced Senior Backend or Full-Stack Software Engineer with a minimum of 5 years of experience who is eager to create the foundational systems that enable last-mile healthcare delivery. In this role, you will engage in developing products that integrate logistics, patient experience, safety, and medical operations. You will be responsible for building and scaling backend services, data flows, integrations, and product experiences that are critical to patient care. Your responsibilities will include routing clinicians, managing booking flows, integrating medical devices, and mitigating clinical errors, allowing you to manage complex, high-impact systems from inception to execution. If you are passionate about solving real-world problems through coding and delivering products that enhance healthcare access, we invite you to apply.Work Environment:As a hybrid company based in the Bay Area, we have offices in both San Francisco and Menlo Park. We value work-life balance and understand that flexibility is essential at times.

Role overview Sleeper is looking for a Senior Backend Software Engineer based in San Francisco. The main focus is on building scalable backend systems that enhance the overall user experience on the platform. This position plays a key role in supporting the technical foundation as Sleeper continues to grow. What you will do Design, develop, and maintain backend solutions that power the Sleeper platform Work closely with teams from different disciplines to deliver new features and improvements Help ensure backend services remain stable and performant as the number of users increases

Airtable is on the lookout for a highly skilled Senior Software Engineer to join our Product Backend team. In this role, you will collaborate with cross-functional teams to design and implement robust backend solutions that drive our product’s architecture. Your expertise will help us enhance user experience and scalability while ensuring system reliability and performance.

About UsWe are an innovative stealth-mode company funded by a16z Speedrun, dedicated to empowering leading consumer brands to achieve exceptional growth. Our cutting-edge solutions have gained the trust of pioneering organizations like Higgsfield and Promova among others. As we expand, we seek talented individuals who are eager to make a significant impact in the realm of consumer technology. You will be part of a passionate team at a crucial juncture, thriving in an environment that champions initiative, ambition, and creative solutions.The RoleAs a Senior Backend Engineer, you will be instrumental in developing and maintaining the essential backend infrastructure that powers our products. Your responsibilities will include:Designing scalable architectures that effectively support new product features and business objectives.Leading the development, deployment, and optimization of backend services to ensure top performance, reliability, and maintainability.Collaborating with cross-functional teams to seamlessly integrate third-party platforms, APIs, and cutting-edge AI technologies.Facilitating technical discussions, providing mentorship, and sharing best practices with fellow team members.Actively contributing to the continuous enhancement of our engineering standards and development workflows.Proactively identifying and addressing complex technical challenges to ensure stable and secure operations.What We ExpectA minimum of 5 years of professional experience in backend development, showcasing a history of delivering reliable and scalable systems.Advanced expertise in server-side programming and experience in designing database-driven applications.A solid understanding of API development, systems integration, and software engineering best practices.Proven experience in building and maintaining production environments that scale effectively for real users.An independent, proactive approach to problem-solving, coupled with the ability to drive projects forward.A commitment to joining our team full-time, with a desire to grow within a fast-paced, ambitious startup.How to ApplyPlease send us a brief introduction about yourself, along with a description of a technical project or system you are most proud of. We are excited to learn how you can contribute to our vision and success.

About the PositionAs a Senior Backend Engineer at Nash, you will be instrumental in the design and development of our backend systems, services, and APIs. Collaborating closely with our CTO, co-founder, and the engineering and product teams, you will help scale our platform, enhance performance, and build a robust infrastructure that facilitates seamless logistics operations. This role presents an exciting opportunity to contribute to Nash as we create innovative products across the logistics value chain for enterprises, marketplaces, and small to medium-sized businesses (SMBs).Key ResponsibilitiesDesign, develop, and maintain high-performance, scalable backend services and APIs.Architect and implement efficient data structures and models.Optimize system performance, scalability, and security.Debug, troubleshoot, and resolve backend issues in production environments.Work closely with frontend engineers to develop seamless API integrations.Implement best practices for observability, monitoring, and logging to ensure system reliability.Collaborate both independently and as part of a team to tackle complex technical challenges.Promote best practices in documentation, testing, and maintainability.Qualifications4+ years of experience in developing and deploying scalable backend systems.Proficient in Python and related backend frameworks.Experience in designing and utilizing RESTful APIs and databases (e.g., PostgreSQL, AWS RDS).Solid understanding of cloud platforms (preferably AWS) and deployment best practices, including managed services (serverless, databases, queues) and CI/CD pipelines.In-depth knowledge of scalable system design and performance optimization.Exceptional problem-solving skills with the ability to work independently in a dynamic environment.Startup experience is advantageous but not mandatory.Preference for candidates located in the Bay Area; Nash operates a hybrid-first product team with an office in San Francisco.Bonus: Familiarity with AsyncIO and event-driven programming.

About FormalAt Formal, we are redefining data security with our innovative platform that empowers teams to effortlessly manage and understand their data.We are developing a cutting-edge protocol-aware reverse-proxy for datastores and APIs, enabling organizations to gain real-time insights into their data management. This ensures that sensitive information is handled with utmost care through robust masking, filtering, and anonymization policies.Our solutions are trusted by industry leaders like Ramp, Gusto, and Notion, addressing critical needs in data security, compliance, quality management, and infrastructure access.Backed by leading venture capital firms such as Thrive Capital and Y Combinator, along with angel investors who are executives and founders from top tech companies like Datadog, Clickhouse, Plaid, and Vanta, Formal is poised for rapid growth.About the RoleWe are on a quest to assemble the most talented engineering team and are seeking individuals eager to make significant contributions towards shaping our product and advancing our mission.The ideal candidate will possess extensive experience in developing scalable backend systems, demonstrate a strong sense of ownership, and thrive in managing projects from concept to production deployment.Our current technology stack includes Golang, Rust, Temporal, various datastore protocols (Postgres, S3, Kafka, MySQL, Snowflake, Redshift, SSH), and AWS.What You'll DoDesign and implement a high-performance data platform capable of processing large data volumes in real-time.Develop new product features from initial research through implementation and ongoing maintenance.Enhance the performance and reliability of both new and existing features.Lead initiatives that you believe will significantly impact Formal's success.Architect scalable services as our organization expands and manages increased traffic.What You NeedProven experience in software development focusing on data-intensive platforms.A commitment to writing simple, high-performance code.Strong expertise in Golang with a solid understanding of its ecosystem.Experience with streaming data processing frameworks such as Apache Kafka and Google Pub/Sub.

About the RoleWe are seeking a highly skilled Senior Backend Software Engineer to join our dynamic team at FurtherAI, located in the heart of San Francisco, CA. Please note that this position requires in-office presence and is not eligible for full-time remote work.CompensationThe annual salary range for this role is between $150,000 and $250,000, commensurate with experience, along with equity options and comprehensive benefits.Who We AreAt FurtherAI, we are pioneering revolutionary AI-driven solutions specifically designed for the insurance sector, a vast market primed for disruption. With over $30 million raised from esteemed investors such as Andreessen Horowitz, Y Combinator, Nexus, South Park Commons, and Converge, our company has experienced remarkable growth, achieving a tenfold increase in revenue this year alone. We proudly serve some of the largest insurance providers globally, including a recent partnership with a top-five insurer. Our team consists of AI experts and seasoned entrepreneurs, ready to reshape the future of insurance.Why You Should Join UsExponential Growth: Experience the thrill of being part of a post-product-market fit company with rapidly increasing revenue.Elite Team: Collaborate with an exceptional founding team that includes former members from Apple AI Research, several ex-Y Combinator founders, and veterans from leading tech companies like Microsoft, Google, and Amazon.Technical Challenges: Engage with advanced AI problems alongside a staff research scientist and a talented team of engineers.Impactful Work: Be a part of transforming the insurance industry, a critical component of global commerce.Ownership Mindset: Take charge of significant aspects of the product and explore future entrepreneurial opportunities.Your ResponsibilitiesArchitect and enhance the core product to ensure optimal performance and reliability.Take ownership of substantial portions of our backend stack, primarily utilizing Python.Work closely with the founders to define and drive the technical roadmap.Demonstrate a strong sense of ownership in a fast-paced work environment.Commit to working in-person at our San Francisco office five days a week.