Staff Backend Engineer

Why Weave ExistsAt Weave, we are on a mission to revolutionize the way therapeutic knowledge is captured, transformed, and communicated throughout the drug development process. Our innovative approach combines human expertise with advanced AI tools to accelerate the delivery of safe and affordable medications to patients.The Weave Platform enhances regulator…

Join Coupang as a Staff Backend Engineer in our eCommerce Engineering team, where you'll have the opportunity to work on innovative projects that shape the future of online shopping.We are seeking a talented engineer with a passion for backend development and a strong understanding of eCommerce systems. You will play a critical role in designing and implementing robust backend solutions that enhance user experience and drive business growth.To apply, please ensure you complete the attached Internal Transfer Request Form and submit it along with your application.

Join the Helius TeamHelius is at the forefront of developing the foundational infrastructure for Solana, enabling developers to craft innovative, crypto-powered applications. Our goal is to revolutionize internet capital markets by simplifying and accelerating on-chain development.Our solutions are trusted by thousands of teams worldwide, from emerging startups to established leaders such as Coinbase, Phantom, and Jupiter, who utilize Helius APIs, webhooks, and indexing tools to enhance their offerings. Supported by Haun Ventures, Founders Fund, and Foundation Capital, we boast a compact yet seasoned team committed to performance, simplicity, and scalability in decentralized systems.Explore our Helius Manifesto to understand our company culture and values.Your RoleWe are searching for a Staff Backend Engineer to take charge of critical infrastructure development. This position offers you the opportunity to shape technical direction, architect systems capable of handling multi-petabyte datasets, and establish engineering excellence standards within our team. You'll tackle high-impact challenges independently, mentor senior engineers, and guide architectural decisions that will define the trajectory of our infrastructure.About the TeamThe Archival team is dedicated to providing APIs for querying Solana's extensive multi-petabyte ledger with sub-100ms response times. If you thrive in environments focusing on large datasets and low-latency performance engineering, this is the ideal team for you. We operate with agility, manage a significant surface area, and function like a close-knit group of founders at the heart of the company.Your ResponsibilitiesLead the architecture and development of ingestion, indexing, and retrieval systems within our archival infrastructure.Steer technical strategies to enhance API performance, reliability, and scalability across high-throughput services.Design and refine data models and query patterns for ClickHouse, Postgres, and RocksDB at scale.Facilitate system design discussions and make key architectural decisions regarding caching, distributed data patterns, and performance trade-offs.Establish standards for operational excellence, debugging methodologies, and performance profiling throughout production systems.Guide and mentor senior engineers to uplift the team's overall capabilities and performance.

Senior Staff Backend EngineerLocation: Manhattan, New YorkOnsite | Full-timeJoin our dynamic team at mlabs, the innovative engine behind one of the most visited platforms in the digital asset industry. With a staggering ~$1B in daily volume, our cutting-edge technology stack is designed to manage low-latency, high-throughput, and consistent load at an unprecedented scale.The RoleAs a Senior Staff Backend Engineer, you will be a pivotal technical leader, ensuring the robustness and continuous advancement of our core backend systems. Your role involves a combination of high-level architectural oversight and hands-on execution, focusing on mitigating scaling challenges and designing resilient, fault-tolerant systems that can handle substantial workloads.What You’ll Do:Own & Execute: Take charge of writing and deploying production code for core services, leading the design and implementation of high-scale distributed systems.Architect for Scale: Make informed decisions that harmonize swift iteration with long-term system scalability and maintainability.Drive Initiatives: Spearhead projects that involve multiple services, including storage, compute, APIs, and blockchain infrastructure.Set the Standard: Create benchmarks for observability, reliability, and performance, while enhancing engineering quality through design reviews and RFCs.Technical Leadership: Serve as a technical anchor during critical incidents and mentor peers, sharing your depth of knowledge and clarity of thought.Optimize Velocity: Enhance the internal developer experience by refining tools, CI/CD pipelines, and service abstractions.

Koyfin is an innovative fintech company dedicated to creating a robust and user-friendly analytics platform that empowers financial advisors and individual investors to explore investment ideas, manage their portfolios, and enhance their businesses. Our mission is to provide every investor with top-tier research tools, free from the complexities and high costs associated with traditional platforms.Our achievements include: Rapid growth as one of the leading platforms for financial advisors, driven by a product-led approach Acknowledged by users as a premier investment solution on G2 Rated as the top research platform for user satisfaction in the Kitces survey, the largest survey within the advisor industryWe are seeking a talented Staff Backend Engineer to spearhead the technical advancement of our platform as we transition from hundreds of thousands to millions of users. This role entails more than just coding; it calls for system-level thinking, mentorship, and architectural leadership. As a Staff Engineer at Koyfin, you will collaborate closely with engineering leadership, product managers, and cross-functional teams to define and build scalable systems that facilitate the next phase of our growth. You will play a vital role in shaping our long-term technical vision while remaining actively involved in coding and system design. If you excel at solving complex problems, driving engineering excellence, and mentoring others, all while creating systems that have a direct impact on investors globally, we want to hear from you.Responsibilities:Architect and drive the technical roadmap for core backend servicesDesign and implement scalable APIs and data processing pipelinesLead critical initiatives affecting multiple teams and business areasCollaborate with engineering leadership to enhance system performance, reliability, and maintainabilityMentor engineers across teams and nurture a culture of technical ownershipDebug and optimize distributed systems and large-scale data flowsAct as a force multiplier by identifying gaps, proposing solutions, and enabling faster progressUtilize modern technologies including TypeScript, Node.js, NestJS, PostgreSQL, MongoDB, AWS, and Kubernetes

Join rogo as a Staff Backend Engineer specialized in Financial Data, where you will play a crucial role in developing robust backend systems that handle critical financial data processes. You will work closely with cross-functional teams to create scalable solutions that meet the evolving needs of our clients.

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

Join Sound.xyz as a Staff Backend Engineer and play a pivotal role in shaping an innovative music economy that prioritizes artists and fosters closer connections between fans and their favorite music.In this role, you will steer the technical direction of our engineering team while also contributing directly to our codebase. Your responsibilities will include architecting and leading new projects, designing and implementing robust API layers, and enhancing our performance and reliability as we scale our product and organization. You will influence the development of core song and artist pages for listening parties, web3 economic tools (NFTs, splits), and community governance and membership tools, empowering the next generation of crypto-native artists and their communities. Your insights will directly affect product decisions and user experiences.

Join Us at the Forefront of AI DevelopmentAt Sema4.ai, we are pioneering an Enterprise AI Agent platform that transforms how knowledge work is performed, fostering collaboration between humans and AI agents in trustworthy and sustainable ways.We are seeking a Staff Backend Engineer for our Agent Platform. In this pivotal role, you will partner with our AI team to construct the systems that bring their cognitive architectures to life, ensuring the delivery of robust, customer-facing features and functionalities.This position promises significant impact, as you will work at the intersection of platform and product, influencing how agents are configured, executed, monitored, and scaled within real enterprise settings. Your efforts will determine whether our agents are not only intelligent but also practical, reliable, and scalable.

About Us:Point One Navigation is at the forefront of redefining precise location technology. Our vision is to create a comprehensive location platform that empowers innovation, enhances safety, and boosts efficiency across various sectors, including robotics and transportation. We pride ourselves on being a dynamic and collaborative team that excels at tackling intricate challenges swiftly and effectively.The Role:We are on the lookout for a talented Staff Engineer to enhance our Backend Services team. In this pivotal role, you will be instrumental in shaping the architecture of our systems and developing services that underpin our global corrections network and real-time location capabilities.Key Responsibilities:Design, develop, and sustain high-performance backend services and network systems using Go and Java.Create detailed systems design documentation, architectural decision records, and comprehensive technical specifications.Engage actively in the formulation of technical strategies, architectural discussions, and infrastructure roadmap planning.Enhance the performance and reliability of mission-critical, globally distributed systems.Collaborate with cross-functional teams to deliver integrated solutions for real-time data processing and corrections delivery.Assume ownership of significant backend infrastructure components, ensuring their design, deployment, and continuous monitoring.

Please ensure to complete the attached Internal Transfer Request Form and submit it accordingly.It is mandatory to apply using your Coupang email account.

About BettermentBetterment is a premier technology-oriented financial services firm dedicated to enabling individuals and investment advisors to realize their investment and retirement goals. Our commitment is to empower people to build wealth confidently and effortlessly. Based in New York City, we embrace a hybrid work model, requiring in-office attendance four days a week. About the RoleThe Broker Dealer serves as the foundational backbone of the Betterment platform. On any given day, we reliably transfer millions of dollars, ensuring that every transaction is meticulously vetted through a comprehensive series of risk assessments to maintain strict regulatory compliance. The efficiency and intelligence invested in this system directly enhance the value we provide to our customers. We are seeking talented engineers who can tackle complex backend scaling, software design, and optimization challenges. In the capacity of Staff Engineer within our Broker Dealer team, you will play a pivotal role in shaping our technical strategy, enhancing system reliability, ensuring timely project delivery, mentoring a team of exceptional engineers, and facilitating the scaling of our systems as we embark on our next growth phase.This position is based out of our NYC office, with a mandate of in-office attendance from Monday to Thursday. Below, we have outlined the base salary range for this role. Actual salaries may vary based on various factors including but not limited to location, experience, and performance. The listed range is just one aspect of Betterment's comprehensive compensation package for employees.New York City: $210,000 - $245,000We offer a competitive equity package, health, dental, and vision insurance, life and AD&D insurance, short-term and long-term disability coverage, employee assistance programs, commuter and parking benefits, flexible spending accounts, health savings accounts, and a 401(k) plan with employer matching, alongside a flexible paid time off policy. This position may also qualify for variable compensation in the form of a company incentive bonus.A Day in the LifeDrive the technical vision and long-term strategy of the team.Develop cutting-edge trading and money-movement technologies that empower clients to maximize their financial resources, enhancing their quality of life.Tackle challenging problems head-on. Your innovative ideas will be immediately put into action, as we believe in experimentation and iterative improvement.

P-940 This position is open to our offices in both Seattle and Bellevue. At Databricks, we are dedicated to empowering data teams to tackle the world's most pressing challenges, from detecting security threats to innovating in cancer drug development. By constructing and managing the globe's premier data and AI infrastructure platform, we enable our clients to concentrate on the critical challenges central to their missions. Founded in 2013 by the original architects of Apache Spark™, Databricks has expanded from a modest office in Berkeley, California to a global powerhouse with over 1,000 employees. We are proud to be one of the fastest-growing SaaS companies, trusted by thousands of organizations ranging from startups to Fortune 100 companies with their most vital workloads. Our engineering teams develop highly technical products that address significant global needs. We continually push the limits of data and AI technology, while ensuring the resilience, security, and scalability essential for our customers' success on our platform. We operate one of the largest-scale software platforms, comprised of millions of virtual machines that generate terabytes of logs and process exabytes of data daily. Given our scale, we routinely encounter cloud hardware, network, and operating system faults, and our software is engineered to seamlessly shield customers from these issues. As a backend-focused software engineer, you will collaborate closely with your team and product management to prioritize, design, implement, test, and operate micro-services for the Databricks platform and products. This role involves writing software in Scala/Java, building data pipelines (Apache Spark™, Apache Kafka), integrating with third-party applications, and engaging with cloud APIs (AWS, Azure, CloudFormation, Terraform). Join one of our dynamic teams, such as: Data Science and Machine Learning Infrastructure: Develop services and infrastructure at the nexus of machine learning and distributed systems. Our technology powers the flagship collaborative workspace, notebooks, IDE integrations, and project management tools. We facilitate machine learning at scale with tools for environment management, distributed training, and managing the machine learning lifecycle through MLflow. Compute Fabric: Create the resource management infrastructure that supports all big data and machine learning workloads on the Databricks platform in a robust, flexible, and secure manner.

Join our innovative team as a Staff Software Engineer (Backend) focusing on payments at Toast, where you'll play a critical role in developing solutions that enhance our payment processing capabilities. We are looking for a talented engineer who is passionate about building scalable and robust backend systems.You will collaborate with cross-functional teams to design, implement, and maintain backend services that ensure seamless transactions for our customers. If you thrive in a fast-paced environment and are eager to tackle complex challenges, we want to hear from you!

Join Trellis as a Staff Backend Engineer in Conversational AITrellis is redefining the insurance landscape by elevating the experience from the inside out. As the technology partner behind Savvy, our licensed insurance agency, we're dedicated to simplifying a traditionally complex industry. Through innovative technology, intuitive design, and a commitment to customer satisfaction, we are transforming insurance shopping into a seamless experience.As a profitable and rapidly expanding Series A startup, Trellis is backed by esteemed investors including General Catalyst, QED, NYCA, and Amex Ventures. Our remote-first culture encourages swift action, bold experimentation, and thoughtful development.If you are looking to make a significant impact and thrive in a dynamic environment, Trellis is the perfect place for you to excel alongside a talented team.Position OverviewAs a Staff Software Engineer on the Conversational AI team, you will play an essential role in revolutionizing our AI-driven customer experiences. You will design and implement intelligent systems that facilitate natural and engaging conversations between users and our platforms. Collaborating with cross-functional teams, you'll convert high-level product goals into scalable and well-tested technical solutions.In this leadership position, you will guide complex projects by defining scopes, setting technical directions, and mentoring fellow engineers. You will navigate challenges, provide insightful code reviews, and help cultivate a culture of continuous learning and collaboration. Whether onboarding new team members or optimizing our LLM-driven infrastructure, you will be a pivotal contributor to our AI advancements.You will report directly to John Hartley, our Head of Conversational AI.We value exceptional work and offer competitive compensation. Our salaries are benchmarked at the 75th percentile of national market data within our industry. For this role, the base salary range is between $220,000 and $235,000. We conduct biannual compensation reviews to ensure we remain competitive and reward our team's contributions.

OpenSea is at the forefront of web3’s evolution, where NFTs, fungible tokens, and innovative digital assets come together to form decentralized, user-driven economies. As a pivotal entity in the crypto landscape, we are crafting the infrastructure that will empower millions of users and redefine how digital value is discovered and exchanged.Our team, though compact, is exceptionally dynamic: hands-on, quick to adapt, and wholly dedicated to delivering impactful work. We prioritize a remote-first culture, leverage AI to enhance productivity, and uphold core values centered on ownership, trust, and continuous improvement. At OpenSea, you’ll be encouraged to accelerate your growth while being supported by a highly skilled team that is pioneering the future of cryptocurrency.We are in search of a passionate and detail-oriented Staff Backend Engineer who is eager to design, develop, and scale advanced, well-tested applications using modern technologies. This role will take the lead on core functionalities within the OpenSea 2.0 backend.Key ResponsibilitiesDevelop and communicate a technical vision for the next generation of OpenSea’s architecture, utilizing highly scalable and event-driven design principles.Create reliable, low-latency marketplace infrastructure software capable of processing billions of dollars in daily transaction volume, including efficient blockchain indexing systems, large-scale order management systems, and REST & Websocket API endpoints.Enhance internal understanding of best practices for developing high-performance and event-driven systems with real-time capabilities.Mentor team members and serve as an internal thought leader to advocate for architectural excellence and cleanliness.QualificationsMinimum of 6 years of experience in software engineering.Proficient in event-driven architecture and system design patterns, including technologies like Kafka, Flink, and Debezium, as well as general distributed systems.Strong command of JVM languages such as Kotlin or Java.Expertise in database selection and schema design for building high-performance and scalable applications.Intrinsic motivation to leverage new tools (e.g., AI) to enhance efficiency and quality of work.A deep-seated passion for blockchain technology, NFTs, and the potential of digital ownership is a significant advantage.

Role Overview Weave is hiring a Staff Software Engineer focused on backend development at our headquarters in Lehi, UT. This role centers on building software that improves customer experiences and supports business growth. What You Will Do Design, develop, and maintain scalable backend systems Work closely with teams across engineering, product, and design Contribute to solutions that directly impact how customers interact with Weave’s products

Archer Aviation builds all-electric vertical takeoff and landing aircraft in San Jose, California. The company focuses on sustainable air mobility, designing aircraft for four passengers with an emphasis on reducing noise. Diversity and inclusion matter here. Archer values a workplace where different perspectives drive better solutions and support every team member’s growth. Role Overview The Senior Staff Backend Engineer, Platform Core, shapes the core services that support Archer’s platform. This includes building and maintaining the Entity Registry, implementing change tracking, developing typed source system connectors, and supporting integration infrastructure used by all applications. The role centers on backend development in Go, tuning PostgreSQL for performance, and designing robust infrastructure. These systems are accessed by application teams through the Platform SDK.

Join Our Mission at LeonaAt Leona, we are dedicated to empowering individuals to take charge of their health and well-being, along with that of their patients and loved ones. Our vision is clear: we aim to revolutionize the healthcare experience for everyone, making high-quality care accessible regardless of geographic location.Patients should feel empowered and comfortable in managing their health proactively, while healthcare professionals can focus on delivering exceptional care without the burden of administrative overhead. Our innovative platform enhances doctor-patient interactions via WhatsApp, acting as an AI clinical assistant to automate non-urgent tasks and provide patients with 24/7 access to their doctors.With offices in San Francisco and Mexico City, our diverse team brings a wealth of experience from renowned tech companies like Rappi, Uber, Modern Fertility, and Wonder. We are proudly supported by top-notch investors, including General Catalyst and Accel, alongside distinguished angel investors from successful firms like Nubank and Maven Clinic.If you are eager to learn, thrive in a dynamic startup environment, and are ready to roll up your sleeves to create something extraordinary, we would love to hear from you!The Challenge AheadWe are searching for a seasoned software engineer to help us scale and shape the future of Leona. Our platform is designed to transform doctor-patient communication, leveraging AI to streamline clinical workflows, reduce burnout, and enhance personalized care. If you are passionate about solving complex engineering challenges, enjoy a multifaceted role, and are excited to take products from concept to launch, this position is tailored for you.

Krew is revolutionizing the credit-servicing sector with cutting-edge AI-driven agents designed to enhance financial wellness. Our innovative approach is supported by notable investors such as Long Journey Ventures (Arielle Zuckerberg, Pascal Levy-Garboua) and prominent angels including Ryan Hoover (Founder, Product Hunt), Charlie Songhurst (Board Member, Meta), and Michael Jones (Former Chair, Huntington Bank Ventures). Our team consists of exceptional talent from renowned organizations including Figure Robotics, Optiver, Bain, and the United Nations, alongside top-tier engineers and researchers from institutions like the University of Chicago and Oxford. Currently, our omnichannel agents assist over 100,000 consumers on their journeys towards financial stability. Our ambitious goal is to resolve more than $1 trillion in outstanding consumer delinquencies globally, employing an empathetic and human-centric approach.Job Overview:We are seeking a talented Member of Technical Staff with a focus on backend engineering. The ideal candidate is a motivated engineer who prioritizes high-quality code and thrives in a collaborative environment driven by rapid innovation.Key Responsibilities:Architect and develop backend APIs and services that empower our AI agents and operational tools.Deliver user-facing features from conception through to deployment (including data modeling, API development, and UI integration).Enhance system reliability, observability, and performance across the engineering stack.Work closely with design, operations, and compliance teams to ensure the delivery of safe and compliant features.Write comprehensive tests, maintain code quality, and engage in design review discussions.Contribute to the evolution of our engineering standards and product development methodology.Minimum Qualifications:A minimum of 2 years of full-time professional experience in backend or full-stack engineering.Proficiency in backend development technologies such as Python or Go.Strong commitment to code quality, including testing, documentation, and code reviews.Preferred Qualifications:Experience in FinTech, Risk Management, or Compliance is advantageous but not essential.Familiarity with LLM/AI-powered products, event-driven architectures, or data processing pipelines.Knowledge of security, privacy, and compliance best practices.