Senior Software Engineer - Logistics Optimization

About Sprinter HealthAt Sprinter Health, we are dedicated to transforming healthcare accessibility by delivering essential services directly to patients' homes. Across the U.S., nearly 30% of individuals forgo preventive and chronic care simply due to accessibility challenges. This often leads to emergency room visits, which contribute to over $300 billion in unnecessary healthcare expenses annually.Leveraging cutting-edge technology akin to that used by leading marketplace and last-mile logistics platforms, we provide care right where it’s needed, particularly for vulnerable populations. To date, we have positively impacted over 2 million patients across 22 states, conducted over 130,000 in-home visits, and achieved an impressive Net Promoter Score (NPS) of 92. Our dynamic team of clinicians, tech experts, and operations professionals has successfully raised over $125 million from esteemed investors such as a16z, General Catalyst, GV, and Accel, ensuring a solid multi-year runway for our growth.About the RoleWe are seeking a Senior Software Engineer to join our Logistics Optimization team, where you will address some of the most challenging algorithmic and operational issues in the healthcare sector. In this pivotal role, you will design and implement systems that efficiently balance clinician availability, patient demand, and routing logistics, forming the backbone of Sprinter's in-home care delivery framework. This position demands deep technical expertise and offers high-impact opportunities, focusing on the convergence of operations research, simulation, and scalable distributed systems.Office LocationAs a hybrid company based in the Bay Area, we operate from offices in San Francisco and Menlo Park. We prioritize work-life balance and are committed to providing flexibility when needed.Key Responsibilities:Design and implement algorithms that optimize clinician routing, scheduling, and dispatching on a national scale.Develop simulations that accurately model demand, capacity, and patient behaviors within real-world constraints.Create predictive models to manage cancellations, no-shows, and optimize overbooking strategies.Collaborate with product and operations teams to translate complex logistics challenges into scalable software solutions.Prototype and deploy forecasting and optimization models within a distributed environment.Engage in continuous improvement practices to enhance system performance and reliability.

At ClickUp, we're not just developing software; we're shaping the future of work! In an era dominated by work sprawl, we identified a more efficient way. This led us to create the first truly integrated AI workspace, consolidating tasks, documents, chat, calendar, and enterprise search, all enhanced by context-driven AI. Our mission is to empower millions of teams to escape silos, reclaim their time, and reach unprecedented levels of productivity. At ClickUp, you'll have the chance to learn, innovate, and leverage AI in transformative ways that will not only influence our product but also the broader landscape of work itself. Join a daring, pioneering team that's challenging the limits of what's possible! We are on the lookout for a technical leader in SaaS client performance who is passionate about enhancing the customer experience through top-tier performance solutions. As a Senior Performance Engineer, you will spearhead comprehensive strategies to optimize application speed, memory utilization, and reliability across our entire platform. You will be empowered to analyze, diagnose, and address performance bottlenecks wherever they arise—be it front-end, back-end, or infrastructure—ensuring ClickUp remains the fastest and most reliable productivity platform available.The ideal candidate is a hands-on authority in browser and NodeJS performance, with a thorough understanding of how code influences rendering, memory management, and overall user experience. You excel in solving intricate challenges, collaborating across teams, and establishing new benchmarks for performance excellence. If you're driven to make a significant impact for millions of users, this is your chance to lead at scale.Your Responsibilities:Conduct root cause analysis on client performance issues and perform post-mortems.Profile application code to identify inefficient algorithms, memory leaks, and other issues; propose and implement effective solutions.Establish performance monitoring, alerting, and dashboards to proactively detect and resolve client performance challenges.Examine client traffic patterns, load testing outcomes, and other metrics to set benchmarks and drive enhancements.Champion performance best practices and set performance standards across the engineering organization.Identify infrastructure upgrades (caching, CDNs, database optimization) to elevate the client experience.Collaborate with development teams to incorporate performance as a core requirement in the development of new features.

Role overview This Software Engineer position at OpenAI focuses on inference and performance optimization. Based in San Francisco, the role centers on increasing the speed and efficiency of advanced AI systems. Collaboration with experienced engineers is a key part of the work, with an emphasis on refining AI performance. What you will do Work on optimizing the performance of AI inference systems Collaborate with other engineers to improve efficiency and speed Contribute to solutions that enhance AI system capabilities Location This role is based in San Francisco.

Join Waymo as a Staff Software Engineer specializing in Simulation Capacity Optimization. In this pivotal role, you will leverage your expertise in software engineering and simulation technology to enhance our autonomous vehicle systems. Your contributions will be vital in optimizing the performance and efficiency of our simulations, ensuring that our vehicles are equipped to navigate the complexities of real-world environments.

Join DigitalOcean as a Senior Engineer focused on Inference Optimizations, where you will play a pivotal role in enhancing our AI and machine learning capabilities. Collaborate with a talented team to develop cutting-edge solutions that optimize inference processes across various applications.

Senior Software Engineer – Cloud Communications Platform Location: South San Francisco, California, USA About Zipline Are you passionate about making a difference in the world? At Zipline, we are dedicated to revolutionizing the movement of goods globally. Our mission is to tackle the world’s most pressing access challenges by developing the first instant delivery and logistics system that serves all individuals, irrespective of their location. From facilitating Rwanda’s national blood delivery network and distributing COVID-19 vaccines in Ghana to offering on-demand home delivery for major retailers and enabling healthcare providers to deliver care directly to homes in the U.S., we are reshaping logistics for businesses, governments, and consumers alike. While our technology is sophisticated, the concept is straightforward: a teleportation service that delivers what you need, when you need it. By utilizing robotics and autonomy, we are committed to decarbonizing delivery, alleviating road congestion, minimizing fossil fuel usage, and enhancing the resilience of the global supply chain. Join Zipline and contribute to creating an equitable and resilient logistics system that impacts billions of lives. About You and The Role Zipline operates a large-scale autonomous system that relies on dependable, low-latency communication between vehicles, ground infrastructure, and cloud services. Our Cloud Communications team is responsible for the platform that transfers critical data from embedded systems to the cloud, ensuring data reliability, scalability, and observability. We seek a Senior Software Engineer to enhance and fortify this platform. This role centers on connecting hardware assets to the cloud, hosting and orchestrating new data use cases, and constructing distributed observability across embedded software, cellular networks, and cloud microservices. In this position, you will collaborate closely with the Embedded and Autonomy teams that develop software to extract data from devices. Your primary responsibility will be to guarantee that data is securely ingested into the cloud, deduplicated, stored, processed, monitored, and accessible for both real-time and offline workflows. This is a high-ownership role directly influencing flight reliability, operational visibility, and the scalability of our global network. What You’ll Do Lead the evolution of services connecting vehicles, charging and loading stations, fulfillment hardware, and other field-deployed infrastructure to the cloud. Design and maintain asset-to-cloud APIs, message schemas, and communication clients in collaboration with embedded teams. Develop and manage ingestion pipelines for new data use cases.

At Kargo, we are dedicated to creating a vital link between the tangible world of freight and the digital platforms that facilitate its management. Our belief is that innovations in smart infrastructure are essential for fostering a safer and more efficient logistics future. Our advanced loading dock sensor platform verifies all incoming and outgoing freight, consolidating data that empowers shippers and carriers to effectively oversee dock operations, transition suppliers, and monitor material flow in real-time. We are deeply committed to providing exceptional solutions for our customers. By joining the Kargo team, you will have the chance to design and implement cutting-edge hardware and software solutions that will transform the logistics industry.

Join Zipline in Revolutionizing Global LogisticsAre you ready to make a meaningful impact in the world? At Zipline, we are dedicated to transforming the logistics industry by solving the most pressing access challenges globally. Our innovative approach has already enabled rapid delivery systems for critical services, from Rwanda's national blood delivery network to on-demand home deliveries for major retailers. We leverage cutting-edge technology, including robotics and autonomous systems, to ensure equitable access to essential goods, reduce carbon emissions, and enhance the resilience of global supply chains. Join us in our mission to create a better future for billions. As a part of our team, you'll play a crucial role in developing and maintaining safety-critical software that powers our operations, ensuring that we deliver our promises to communities worldwide.

At Databricks, we are dedicated to empowering data teams to tackle the world's most challenging problems, from detecting security threats to advancing cancer drug development. We achieve this by offering the premier data and AI platform, allowing our customers to concentrate on their mission-critical challenges. The Mosaic AI organization assists companies in developing AI models and systems utilizing their own data, employing technologies that range from training large language models (LLMs) from the ground up to employing advanced retrieval methods for enhanced generation. We pride ourselves on pushing the boundaries of science and operationalizing our innovations. Mosaic AI believes that a company’s AI models hold intrinsic value, akin to any other core intellectual property, and that superior AI models should be accessible to all. Job Overview As a research engineer in the Scaling team, you will stay abreast of the latest advancements in deep learning and pioneer new methodologies that surpass the current state of the art. You will collaborate with a diverse team of researchers and engineers, sharing insights and expertise. Most importantly, you will be passionate about our customers, striving to ensure their success in implementing cutting-edge LLMs and AI systems by translating our scientific knowledge into practical applications. Your Impact Enhance performance through innovative optimization techniques, including kernel fusion, mixed precision, memory layout optimization, tiling strategies, and tensorization tailored for training-specific patterns. Design, implement, and optimize high-performance GPU kernels for training workloads, including attention mechanisms, custom layers, gradient computations, and activation functions, specifically for NVIDIA architectures. Create and implement distributed training frameworks for large language models, incorporating parallelism strategies (data, tensor, pipeline, ZeRO-based) and optimized communication patterns for gradient synchronization and collective operations. Profile, debug, and optimize comprehensive training workflows to pinpoint and resolve performance bottlenecks, utilizing memory optimization techniques such as activation checkpointing, gradient sharding, and mixed precision training.

At Crusoe, our vision is to enhance the availability of energy and intelligence. We are at the forefront of developing solutions that empower individuals to innovate boldly with AI, all while ensuring that we uphold principles of scalability, speed, and sustainability.Join us in driving the AI revolution through sustainable technology at Crusoe. You will play a pivotal role in fostering innovation, making a significant impact, and collaborating with a team that is leading the way in responsible and transformative cloud infrastructure.About the RoleWe are on the lookout for a Senior Software Engineer to take on the role of founding engineer within our new Enterprise Software Engineering team in IT. You will work closely with the Director to develop internal tools, automation processes, and integrations that remove manual tasks and address critical operational challenges across the organization.This role transcends traditional enterprise IT positions. You will leverage AI-assisted development as your primary method, delivering production-quality software within days instead of months, while laying the groundwork for future team members. As you grow in this role, your primary contributions will focus on defining specifications, context, and reusable patterns to guide AI agents, while still engaging in hands-on coding for the most complex challenges.Your ResponsibilitiesDesigning and deploying internal tools, automation, and integrations that provide measurable benefits across Finance, Operations, HR, and other business functions.Utilizing AI-assisted development as your standard workflow, which includes drafting specifications, creating prompts, reviewing AI-generated code, and iterating quickly.Establishing foundational technical patterns such as coding standards, project conventions, reusable components, and context files that facilitate AI-driven development.Creating and managing integrations between enterprise systems through APIs, middleware, and data pipelines.Developing solutions across a versatile environment that combines cloud application platforms with internal GPU compute for AI workloads.Collaborating with business teams during rapid prototyping sessions, then refining prototypes into production-ready systems complete with testing, monitoring, and documentation.Setting up CI/CD pipelines, automated testing, and quality assurance measures for all solutions delivered.Taking ownership of solutions from end to end, covering everything from specification and implementation to deployment and production support.

Join Planet Labs PBC as a Mission Optimization Engineer Intern! As a part of our dynamic team, you will engage in innovative projects that leverage satellite data to optimize mission operations. This is an exciting opportunity to apply your technical skills in a real-world setting and contribute to our mission of making change visible on Earth.

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.

The Trade Desk is a leading global technology company dedicated to fostering a better, more open internet for everyone through principled, intelligent advertising. With the capability to handle over 1 trillion queries daily, our platform operates at an unparalleled scale. We pride ourselves on our award-winning culture, built on the foundations of trust, ownership, empathy, and collaboration. We appreciate the unique experiences and perspectives that every individual brings to The Trade Desk, and we are committed to creating inclusive spaces where everyone can express their authentic selves at work. If you are passionate about solving complex problems at scale and are eager to join a dynamic, globally-connected team where your contributions will significantly impact the media ecosystem, we invite you to explore why Fortune magazine consistently ranks The Trade Desk among the top small to medium-sized workplaces worldwide. As a Senior Software Engineer, you will have end-to-end ownership, allowing you to engage in various facets of designing, building, and delivering data-centric products for our stakeholders. At The Trade Desk, we focus on constructing the back-end infrastructure of our platform with an unwavering commitment to quality at scale. Whether developing components for our client-facing applications, crafting internal custom solutions for our teams, or building model pipelines for bidding optimizations, we ensure that the infrastructure, development processes, and tools empower us to execute efficiently. Our systems operate continuously, serving global traffic, and we collaborate in a highly cooperative environment while leveraging a diverse array of technologies. Our back-end developers tackle algorithmic, optimization, and scalability challenges across all our initiatives.

Merge stands at the forefront of innovation, delivering cutting-edge tools and customer-centric integrations tailored for emerging LLMs, Fortune 500 corporations, and B2B SaaS enterprises. Our platform encompasses two primary offerings: Merge Unified, which allows organizations to seamlessly incorporate a multitude of integrations through a single API, and Merge Agent Handler, which equips AI agents with secure access to a wide array of third-party tools. Trusted by thousands, Merge's enterprise-level platform streamlines the entire integration lifecycle, ensuring robust authentication, security, monitoring, and maintenance. Our solutions empower companies to accelerate product development, enhance sales efficiency, minimize customer churn, and conserve engineering resources, enabling them to concentrate on their core offerings. Key Responsibilities:Lead discussions on roadmapping and architectural strategies.Develop high-quality, production-ready, and maintainable code.Steer Merge's most significant projects from conceptualization to deployment.Support and empower your team, including engineers, designers, product managers, and business operators.Ideal Candidate Profile:7+ years of professional software engineering experience.Proficiency with frameworks such as Django, Rails, or Spring.In-depth understanding of SQL databases, preferably Postgres.Projects You May Engage In:Scaling Core Systems: Identify and resolve performance bottlenecks in our data syncing engine, lead large-scale migrations to more efficient technologies and storage solutions, and drive initiatives to enhance system throughput.Product Innovation: Design adaptive syncing paradigms that facilitate advanced customization across model normalization, scheduling, data filtering, and API rate limit management.New Revenue Streams: Collaborate on the development of features that open new avenues for revenue generation within the platform.

MidiHealth is seeking a Senior Software Engineer to join the Platform Engineering team. This hybrid role is based in the SF Bay Area and centers on building and enhancing the software that drives MidiHealth’s healthcare technology platform. The work contributes directly to improving patient outcomes through technology. Key responsibilities Design and develop software solutions for the core platform Collaborate with engineering, product, and cross-functional teams to deliver integrated features Support the reliability and scalability of the platform Location This position requires regular on-site work in the SF Bay Area as part of a hybrid schedule.

About NeonNeon is an innovative global payments and e-commerce platform dedicated to empowering game publishers with greater financial autonomy and independence from traditional app stores. We advocate for open and transparent commerce: providing our partners with clear decision-making processes, actionable insights, and aligned incentives. Founded by industry veterans with extensive backgrounds in payments, fintech, and gaming, Neon prioritizes excellence in product development and partnerships. We collaborate closely with our clients, sharing insights, navigating decisions, and minimizing risks and complexities. Our mission is to replace outdated systems with clear, modern, and developer-focused infrastructure.As an early member of our team, you will play a pivotal role in shaping and scaling Neon’s products and cultural ethos, directly influencing our growth and success. You’ll be part of a diverse, collaborative team comprised of talent from esteemed organizations such as Apple, Affirm, Unity, and Visa. Backed by prominent venture capitalists like Thrive, a16z, Griffin Gaming, Ribbit, and Renegade, we invite you to join us in building disruptive technology that challenges the status quo and empowers game creators to thrive on their own terms.About the RoleWe are on the lookout for a Senior Software Engineer to lead the development of one of our crucial workstreams. As a design-oriented engineer, you will transform innovative concepts into functional, aesthetically pleasing products on a blank canvas. Your contributions will span the full technology stack, as you engage hands-on in building and scaling a core product that enhances financial independence for game developers.What You’ll DoCreate and maintain both front-end and back-end components of our platform.Work collaboratively with product leaders, designers, and other engineers to define, design, and deliver new features.Ensure that all features are scalable, performant, secure, and user-friendly.Write clean, maintainable, and efficient code, engage in code reviews, and uphold comprehensive documentation.What We Look ForMinimum of 5 years of software engineering experience.Proficient in full-stack development with a strong emphasis on React and TypeScript.A passion for continuous learning and adaptability across the technology stack as the team evolves.Highly productive, demonstrating ownership of key initiatives and delivering impactful results.Experience in leading teams or projects and a passion for mentoring others to enhance their skills.Willingness to work from our San Francisco or New York City offices.Join Neon and be a part of our journey!

About Redwood MaterialsRedwood Materials is at the forefront of localizing a global battery supply chain that integrates recovery, reuse, and recycling—ensuring critical minerals remain in circulation while propelling the energy transition. Founded in 2017, we are pioneering low-cost, large-scale energy storage and manufacturing battery materials in the U.S. for the first time, all sourced from batteries that are currently in circulation.Essential Duties: As an Energy Optimization Engineering Intern, you will play a crucial role in developing the predictive "intelligence layer" designed to manage energy for AI Data Centers and microgrids. Under the mentorship of senior engineers, you will assist in constructing and validating time-series forecasting models for GPU power loads and market prices, integrating these insights into Mixed-Integer Programming (MIP) prototypes. You will work alongside cloud software teams to test these "forecast-informed" algorithms in a cloud-native setting, aiding in the simulation and backtesting of energy management strategies. Your goal is to enhance the accuracy and efficiency of our Energy Management System (EMS), gaining practical experience in "value-stacking" and real-world energy optimization. This internship is for Summer 2026.Responsibilities Include:

Join Discord, a platform that captivates over 200 million monthly users, primarily gamers, who collectively dedicate 1.5 billion hours to diverse gaming experiences. At Discord, we are committed to enhancing communication and social interactions in the gaming realm, making it more enjoyable for users to connect before, during, and after their gaming sessions.We are on the lookout for an enthusiastic and mission-driven Senior Software Engineer to become a vital part of the Notifications team at Discord. This team plays a crucial role in ensuring users stay engaged and connected through our platform. As part of a multidisciplinary squad, you will collaborate with engineers across various domains including user experience, infrastructure, and machine learning to deliver notifications that are both meaningful and valuable.As a full-stack engineer who is data-driven and has a strong product sense, you will thrive in our collaborative environment, tackling intricate challenges across the entire technology stack.

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.

Join Hilbert, a pioneering data science-driven growth engine that empowers B2C teams with predictive insights into user behaviors, revenue streams, and sustainable growth strategies. Our innovative platform reduces decision-making cycles from months to mere minutes.Serving a range of clients from Fortune 10 companies to cherished brands such as FreshDirect, Blank Street, and Levain Bakery, our platform is the backbone of their growth strategies. We are also collaborating with leading AI firms to enhance our capabilities.We are on the lookout for a Core Data Engineer to lay the groundwork for our integration team, enabling them to operate at 10x their current speed. While others may focus on connecting systems, your mission is to ensure the integrity and flow of our data refinery. You will manage our 'shared brain', optimize ClickHouse clusters, and develop monitoring systems that proactively identify pipeline issues before they impact our customers.ROLE OVERVIEWEfficiency Expert: You thrive on minimizing query times and memory usage, always considering scalability and reliability.Dagster Enthusiast: You bring experience or a strong desire to excel in Dagster for intricate orchestration.OLAP Specialist: You possess a deep understanding of ClickHouse (or similar platforms like Druid/Pinot) and know how to structure data for optimal analytical performance.Software Development Advocate: You treat data code with the same rigor as production software. CI/CD, unit testing, and modular code are non-negotiable for you.Global Collaboration: You can coordinate with our global team, providing at least 5 hours of overlap.WHO EXCELS IN THIS ROLEYou will optimize the performance of our ClickHouse implementation.You will devise configuration schemas that facilitate controlled data ingestion pipelines.You will build and sustain shared Python libraries for data synchronization across the engineering team.You will enhance our canonical data models to balance scalability with performance.You will architect our monitoring, alerting, and observability systems to ensure high confidence in our data integrity.You will design new integration pipelines by exploring novel data sources and sync mechanisms.