Backend Software Engineer

Company OverviewAt Tennr, we are revolutionizing the referral process in healthcare. When patients receive a referral from their doctors, the wait can often feel endless—sometimes lasting days, weeks, or even months. This delay is largely due to the overwhelming volume of referrals and the cumbersome manual processes that can hinder timely action. With our innovative technology powered by RaeLM™, Tennr ensures that every referral reaches its destination swiftly and accurately, with all necessary information in hand. We empower providers to capture more referrals, minimize denials, and eliminate waiting times.Role OverviewWe are on the lookout for a dedicated Backend Software Engineer who specializes in systems architecture, data modeling, and large-scale workflow orchestration. In this pivotal role, you will architect and implement features across our backend services and infrastructure, delivering significant value to our customers. Your responsibilities will include designing and optimizing data schemas, developing resilient backend services, and ensuring seamless integration with third-party systems.You will spearhead initiatives focused on high-volume workflow automation, emphasizing the creation and optimization of scalable data processing and machine learning infrastructure. This encompasses the design and maintenance of complex workflows that harness ML for automation, alongside performance optimization efforts to guarantee scalability and reliability throughout the stack.Collaboration is essential in this role. You will work closely with our sales and customer experience teams to incorporate valuable customer feedback, and partner with engineering colleagues to bring robust solutions to life. We are seeking someone who embodies a founder's mindset, excels in systems-wide thinking, and proactively drives projects from inception to completion.The ideal candidate will have substantial experience with backend architecture, event-driven systems, and orchestration frameworks, showcasing a proven history of developing production-ready systems. You will play a crucial role in shaping the technical foundation of our platform, ensuring its reliability, scalability, and adaptability as we continue to grow.

Join our innovative team as a Backend Software Engineer and help us redefine the future of talent acquisition. At Lever, we are committed to building cutting-edge hiring software that empowers organizations like Netflix, Shopify, and Spotify to attract and retain top talent. As we continue to evolve and enhance our platform, we seek passionate individuals who thrive in a collaborative, people-first culture.While this posting serves as a test job for Lever's environment, we invite you to explore our actual openings and consider joining our award-winning team.

Field sales is a critical driver of our economy; however, many teams are facing challenges. Sales representatives find themselves overwhelmed with administrative tasks, managers are stretched thin, and leaders lack visibility into field activities.At Siro, we are revolutionizing the way field sales teams engage, learn, and succeed.Initially launched as an AI-driven coaching platform aimed at enhancing sales outcomes, we have evolved into a more comprehensive solution. Our intelligent companion not only automates mundane administrative tasks for sales reps but also provides managers with real-time insights and empowers executives with predictive analytics.Our platform seamlessly integrates with systems like Salesforce, analyzing a multitude of in-person sales conversations to extract valuable insights, automate workflows, and enhance organizational performance. Imagine having an Iron Man-like assistant tailored for sales—proactive, personalized, and integrated with the tools teams rely on daily.Backed by $75 million from prestigious investors such as Index, Fika, CRV, and SignalFire, Siro serves leading brands in home improvement, retail, hospitality, and automotive industries. Our team comprises talented individuals from top-tier companies including Meta, McKinsey, DoorDash, and Uber.Join us as we shape the future of human-AI collaboration in sales—this is just the beginning!

At Mirage, we are pioneering an AI-driven video platform that revolutionizes the production and editing process through natural language. Our innovative models harness contextual intelligence to replicate the creative decisions made by professional editors, thereby significantly enhancing productivity for experienced teams while democratizing video creation for all.Join our interdisciplinary team as we confront some of the most complex technical and creative challenges in generative media. As an early member of our team, your contributions will address foundational issues that remain largely unresolved in the industry, allowing you to make a substantial impact on the future of creative expression.Learn more about usProduct (Captions by Mirage) Research (Seeing Voices, technical-white-paper)Updates (Follow us on X / Twitter)TechCrunch, Forbes AI 50, Fast Company (press releases)Our Esteemed InvestorsWe are privileged to have the support of top-tier investors and visionary entrepreneurs, including Index Ventures, Kleiner Perkins, Sequoia Capital, Andreessen Horowitz, and many others.Please note that all roles require in-person attendance at our NYC headquarters located in Union Square.Role OverviewAs a Backend Software Engineer at Mirage, you will have the opportunity to engage in diverse areas including product development, platform engineering, and machine learning. You will be responsible for building and managing the systems, services, APIs, and machine learning pipelines that drive our product offerings. Collaborating closely with product, design, client, and AI teams, you will take ownership of critical backend systems from conception to completion, transforming ambitious ideas into robust and scalable production solutions.

Join a Revolutionary CompanyAt Palantir, we develop cutting-edge software that transforms data into actionable insights. Our platforms enable our partners to create life-saving medical solutions, predict supply chain challenges, and solve critical societal issues like locating missing children.About the RoleIn the Defense sector at Palantir, we create essential products tailored for modern warfare. Our comprehensive ecosystem allows clients to securely manage and visualize their data, developing advanced programs for operational planning, alert systems, and resource distribution powered by sophisticated machine learning models. Our defense solutions are pivotal for daily operations in military command centers and on the battlefield.As a Backend Software Engineer at Palantir, you’ll develop scalable software that revolutionizes data utilization across organizations. You will participate in every stage of the product lifecycle, from ideation to design, prototyping, and final delivery. Collaboration with both technical and non-technical team members will be key to understanding user needs and creating effective solutions. We promote cross-team collaboration to enhance skills and share insights, allowing you to gain knowledge across various technologies and product features. You will work autonomously, making decisions independently while being supported by a community that challenges you to grow and become a technical leader.Your daily responsibilities will be dynamic, tailored to user requirements and emerging technical challenges. One day, you might collaborate with fellow engineers to design a new system for an innovative workflow; the next, you could optimize system performance for low-latency outcomes.Our Product Development teams consist of small, focused groups of Software Engineers dedicated to specific product facets. Together, they enhance user workflows and continuously improve the efficiency and reliability of our software.We seek engineers who are passionate about addressing real-world challenges and enabling developers and end-users to maximize their effectiveness. If you are driven to create reliable, high-performance, scalable systems and robust APIs, we encourage you to apply.

Join a Transformative Force in TechnologyAt Palantir, we create groundbreaking software that revolutionizes data-driven decision-making and operational efficiency. Our platforms enable partners to combat critical challenges—from developing life-saving medical treatments to predicting supply chain disruptions and locating missing persons.Position OverviewAs a Backend Software Engineer at Palantir, you will play an essential role in shaping how organizations leverage data. You will be engaged in all stages of the product lifecycle, from ideation and design to prototyping and final deployment. Collaborating with both technical and non-technical team members, you will gain insights into customer challenges and develop innovative solutions. We promote cross-team collaboration, allowing you to expand your knowledge across various technologies and product facets. You will work autonomously and make impactful decisions within a supportive community that fosters your growth into a technical leader.Our Product Development teams are composed of small, focused groups of Software Engineers, each dedicated to distinct aspects of our offerings. The infrastructure teams are tasked with fortifying the foundational layers of our software stack, emphasizing database technologies, distributed systems, large-scale data architectures, security, and application infrastructure. In this role, you will write robust code that supports Palantir Foundry and Gotham, ensuring high performance, security, and scalability for products utilized by key public and private sector institutions. You will be instrumental in building the core capabilities that empower research scientists, aerospace engineers, intelligence analysts, and economic forecasters worldwide.We seek engineers who are driven by a passion for solving real-world challenges, enabling both developers and end-users to maximize their productivity. If you are eager to create reliable, high-performing, and scalable systems, and to design resilient APIs, this opportunity allows you to make a substantial impact on our products and the communities we serve.

About the Role:Parker is dedicated to a bold mission: empowering individuals to achieve financial independence. We believe that by providing independent business owners with essential financial tools, we can help them scale their operations profitably.Our flagship product merges a virtual corporate card with financial software designed for profitability, enabling eCommerce merchants to accelerate growth while effectively managing their margins.To date, we have successfully raised over $180M from top-tier investors, including Valar Ventures, Y Combinator, SVB, and industry pioneers such as Solomon Hykes (Docker), Paul Buchheit (Gmail), Paul Graham (Y Combinator), and Robert Leshner (Compound).As a dynamic Series B fintech, we are rapidly expanding, boasting a robust product-market fit, a burgeoning customer base, and a team driven by technical excellence and impactful solutions.We are seeking a Senior Software Engineer – Backend to architect, develop, and scale the critical systems that underpin Parker’s financial platform. In this pivotal leadership role, you will influence backend architecture, data infrastructure, and engineering best practices during our growth phase.You will work collaboratively with Product, Infrastructure, and Data teams to deliver high-performance, reliable systems that handle billions in transactions and empower thousands of merchants. This high-impact position is ideal for engineers who thrive on ownership, relish the challenge of complex systems, and prioritize elegant, maintainable solutions.What You’ll Do:Design and scale backend services that drive Parker’s financial products and APIs.Lead architectural strategies to guarantee performance, reliability, and scalability across our systems.Develop and maintain services in a modern cloud-native environment (Node.js, PostgreSQL, Docker, Kubernetes, AWS).Collaborate with product and infrastructure teams to create secure, user-friendly APIs and data models.Promote engineering excellence through code reviews, mentorship, and architectural guidance.Identify performance issues and spearhead initiatives to enhance reliability, observability, and system design.Contribute to the advancement of Parker’s technical roadmap and long-term engineering vision.

Join our dynamic team at Databricks as a Staff Backend Software Engineer where you will play a pivotal role in building and enhancing our backend systems. You will collaborate with cross-functional teams to design scalable solutions that drive innovation. Your expertise will be crucial in optimizing our cloud data platform and ensuring top-notch performance and reliability.

Join Grow Therapy as a Backend Software Engineer, where you'll play a pivotal role in developing our cutting-edge software solutions. Collaborate with a talented team to enhance our platform's functionality and performance, ensuring a seamless experience for our users.

About AKASAAt AKASA, we are on a transformative journey to redefine healthcare through the power of artificial intelligence. As a trailblazer in generative AI solutions tailored for the healthcare revenue cycle, we empower health systems to accurately capture and relay the complete patient clinical journey. By enhancing operational efficiency, we enable these systems to prioritize what truly matters: delivering exceptional patient care. With over $205 million raised in funding from esteemed investors like Andreessen Horowitz, BOND, and Costanoa Ventures, our future is bright.Now is the most thrilling time to become part of AKASA. Since launching our innovative AI-native product suite in 2024, revenue bookings have surged over 20 times. We have set records by closing the largest deals in our company’s history three times in a row, driven by the substantial advancements we've made in clinical quality and documentation accuracy—two critical areas for health system leaders.Our implementations have garnered national attention, being recognized as "one of the most comprehensive real-world applications of GenAI in healthcare finance to date" (link). Our clientele represents over $120 billion in net patient revenue and includes pioneering health systems like Cleveland Clinic, Duke, Stanford, and Johns Hopkins.Recently, we have been honored with accolades such as being named the #1 most promising healthcare RCM startup of 2025 by Black Book Market Research and listed among the fastest-growing GenAI startups to watch by AIM Research. Our CEO has been recognized as one of the “Top 50 Healthcare Technology CEOs” by the Healthcare Technology Report, and we have proudly maintained our status as a “Great Place to Work” for five consecutive years.Join us as we build on this momentum to redefine the possibilities within healthcare. We seek exceptional talent to help accelerate this mission.About the RoleAs a Senior Backend Software Engineer, you will develop AI-driven solutions for our Clinical Documentation and Medical Coding suite. Collaborating closely with product, design, and machine learning teams, you will design and implement services, APIs, and tools that enhance our SaaS offerings. You will have the opportunity to work on groundbreaking projects that directly impact healthcare delivery.

At Bubble, our mission is clear: we aim to empower everyone to create software. We believe that anyone with a transformative idea should have the means to bring it to life. Our AI-driven visual development platform allows individuals, from first-time entrepreneurs to established enterprise teams, to transform ideas into fully functional, scalable applications across web, iOS, and Android—all without the need for coding or managing complex workflows.As the sole full-stack, cross-device no-code platform, Bubble has garnered over 5 million users across more than 100 countries, breaking down barriers to entrepreneurship and innovation worldwide.Our Achievements:Our platform is thriving, with entire VC-backed companies being built solely using Bubble. After successfully finding product-market fit and eight years of bootstrapping, we secured a $100 million Series A funding round, establishing ourselves as one of the fastest-growing companies within the New York tech ecosystem. The potential of Bubble is demonstrated by our community—individuals are not just launching products; they are creating viable businesses. For instance, Mailead turned a $10k investment in a Bubble product into a $2M valuation, while Faceless.video achieved over $1M in annual recurring revenue within a year.About the Platform Team:Our Platform team is dedicated to enhancing our scaling, reliability, and enablement capabilities as we aim to double our customer base in the coming years. Our responsibilities encompass both scalable infrastructure and our core backend systems. Success in this role means delivering timely capacity, executing workloads rapidly, and guaranteeing data scalability across diverse applications while managing costs and addressing implementation and infrastructure inefficiencies.About the Role:Join a small, elite team tackling challenges faced by the largest cloud providers. This position is an opportunity to be at the forefront of a platform that is revolutionizing the traditional engineering stack globally. Additionally, you will contribute to fostering an inclusive, effective, and collaborative engineering culture. This role requires after-hours and on-call availability.

About Sei LabsAt Sei Labs, we are pioneering the development of open-source technology for the Sei Blockchain—a groundbreaking parallelized EVM Layer 1 blockchain engineered for scalability. Our innovative optimizations empower Web3 applications to achieve Web2-scale performance, significantly contributing to the mass adoption of digital assets.Our dynamic team comprises seasoned professionals from leading companies such as Google, Goldman Sachs, Robinhood, Nvidia, and Databricks, all committed to ushering in the next billion users into a flourishing ecosystem of applications.Sei Labs has successfully secured over $30 million in funding from prominent investors, including Jump Crypto, Multicoin Capital, Coinbase Ventures, Distributed Global, Hudson River Trading, and Flow Traders.Visit our website and docs for more information.Incubations Engineering at SeiWe are seeking a talented Backend Software Engineer to join our Incubations team and play a crucial role in shaping the future of Web3. You will collaborate with our ecosystem partners to create innovative, high-impact applications across the Sei Blockchain, including decentralized applications (dApps) in various domains such as decentralized exchanges (DEXs), gaming, decentralized physical infrastructure networks (DePin), artificial intelligence, and more. If you thrive in a fast-paced, community-focused environment and are eager to learn and grow, this is an exceptional opportunity to redefine the possibilities of decentralized technology.

About The Role:At Parker, our mission is clear yet ambitious: to empower individuals toward financial independence. We believe that providing independent business owners with the essential financial tools is the best way to help them scale their businesses sustainably.Our flagship product features a virtual corporate card equipped with dynamic spending limits alongside software tools focused on profitability. This empowers eCommerce merchants to accelerate their growth while maintaining control over their financial margins.Having successfully raised over $180M in equity and debt from renowned investors such as Valar Ventures, Y Combinator, SVB, as well as influential founders like Solomon Hykes (Docker), Paul Buchheit (Gmail), Paul Graham (Y Combinator), and Robert Leshner (Compound), we are a rapidly scaling Series B fintech company experiencing high product-market fit and increasing demand.We are on the lookout for a Backend Software Engineer to architect and scale the fundamental systems that ensure our platform remains fast, reliable, and secure. Your responsibilities will encompass designing APIs, modeling data, and optimizing infrastructure for enhanced performance and growth. We seek engineers with a robust systems mindset and at least 5 years of experience in building backend services from scratch—individuals who appreciate thoughtful abstractions, understand how to act swiftly without compromising on reliability, and enjoy collaborating with product and infrastructure teams to create scalable impact.

About Us:Ether.fi stands as one of the leading cryptocurrency companies globally, managing over $10 billion in assets with a predominantly technical team of 30 members. We have achieved profitability from day one and are dedicated to developing impactful consumer applications.Our vision encompasses the evolution of genuine on-chain banking. Our innovative products—Stake, Liquid, and Cash—empower users to earn yield through diverse DeFi strategies while facilitating real-world spending via our credit cards. Public analytics for Cash and Stake are available for review.Position Overview:We are in search of a senior backend software engineer to take charge of our core backend architecture, transaction processing, and ensuring high availability. You will be part of a pivotal engineering team committed to delivering distributed, scalable, and resilient backend systems. This includes card transaction processing, low-latency APIs, microservice architectures, and on-chain data indexing—essentially, everything a neobank would aspire to build is on our roadmap.Responsibilities:Take ownership of critical components within our backend systems, enhancing functionality to boost throughput and reduce latency.Design, develop, and optimize scalable transaction processing services to facilitate high-throughput, low-latency financial transactions.Address challenges related to user friction during card transaction declines.Enhance our Cloud Infrastructure, CI/CD pipelines, automation, observability, and monitoring systems.Qualifications:Solid foundation in software engineering principles and problem-solving abilities.Proven experience in shipping remarkable products that serve thousands of real users.A minimum of 5 years of professional coding experience.A strong drive and a commitment to excellence; we are a highly ambitious team with bold goals, and we strive diligently to achieve them.Experience in web3 technologies is a plus.Perks and Benefits:Competitive salary and performance-based incentives.

Company OverviewTennr is revolutionizing the referral process in healthcare by ensuring that every patient referral is handled swiftly and efficiently. By utilizing our innovative RaeLM™ technology, we extract and manage patient information, enabling healthcare providers to capture more referrals, minimize denials, and significantly reduce delays.Position OverviewWe are on the lookout for a talented Senior Backend Engineer who is enthusiastic about systems architecture, data modeling, and large-scale workflow orchestration. This role involves designing and implementing features across our backend services to deliver exceptional customer value. You'll have the opportunity to design and optimize data schemas, build reliable backend services, and ensure smooth integration with third-party systems.Your expertise will play a vital role in high-volume workflow automation, focusing on developing and optimizing scalable data processing and machine learning infrastructure. This entails creating and maintaining complex workflows that utilize machine learning for automation, as well as leading performance optimization efforts to uphold best practices throughout the stack.Collaboration is essential—you will team up with sales and customer experience teams to integrate customer feedback and work alongside engineering colleagues to deliver robust solutions. We seek an individual who adopts a founder’s mindset, excels in systems-wide thinking, and takes the initiative to drive projects from concept to completion.The ideal candidate will possess profound experience in backend architecture, event-driven systems, and orchestration frameworks, and have a proven track record of building production-ready systems. You will be instrumental in shaping the technical foundation of our platform to ensure reliability, scalability, and adaptability as we grow.

Join Flex, a dynamic and innovative FinTech company based in NYC, as a Senior Backend Software Engineer. In this pivotal role, you will be instrumental in architecting, developing, and scaling backend services and APIs that empower our groundbreaking rent payment platform. Collaborate with cross-functional teams to deliver resilient and efficient systems that enhance the renting experience for users and partners alike. You will oversee every aspect of the service lifecycle, from initial requirements gathering and system architecture to implementation, testing, deployment, and ongoing monitoring. Additionally, you will have the opportunity to mentor junior engineers and promote technical best practices within the team, fostering a culture of excellence and collaboration.

Join Palantir Technologies as a Senior Backend Software Engineer specializing in Infrastructure. In this pivotal role, you will work at the intersection of software engineering and infrastructure systems, contributing to the design and implementation of scalable backend solutions that empower organizations to make data-driven decisions.

Noise Labs is building tools that blend diverse online data and market insights to help users navigate uncertain times. Based in SoHo, New York City, the team is small (10 people), collaborative, and values thoughtful design and high-quality engineering. Remote work is possible. What You’ll Do Develop backend systems that power consumer features such as feeds, ranking algorithms, notifications, real-time interactions, and social elements. Build and maintain a codebase that supports both developer and automated agent confidence. Own core product services, data flows, and APIs. Design infrastructure where speed and accuracy matter, especially for settlement, pricing, and real-time financial transactions. Improve the development environment, including CI, testing, and observability. Requirements Skilled in using AI tools to speed up development. Strong judgment for balancing latency and accuracy in financial systems. Deep experience with TypeScript, relational databases, real-time communications, and event-driven data flows in finance. Comfortable working in a strict monorepo setup with clear service boundaries and conventions. Ability to independently debug and improve the development pipeline. Clear communicator for async updates, incident reviews, and team problem-solving. Bonus Points Experience with Effect-TS. Side projects, open source work, or previous startup experience. Compensation and Benefits The minimum full-time salary ranges from $160,000 to $210,000, in compliance with New York City's Pay Transparency Law. Full-time employees at Noise Labs are also eligible for additional compensation, including equity and benefits, based on the specific role.

At Highlight, we're creating a revolutionary shared intelligence layer tailored for today’s dynamic workforce. Our platform integrates context across all team members and tools, effectively dismantling information barriers. It adapts to your organization, intelligently routing knowledge and consistently automating workflows.About the PositionWe are in search of a Senior Backend Software Engineer to be responsible for essential backend infrastructure, including systems for team management, permissions, and integration-driven workflows. Your primary focus will be to enhance and scale our systems with a strong emphasis on performance, reliability, and an exceptional user experience.This role is perfect for an individual passionate about the convergence of desktop software, native development, and AI integration, and who thrives in a collaborative, fast-paced environment.Please note: This position requires on-site presence at our New York City office five days a week.Key ResponsibilitiesDevelop backend systems that facilitate product expansion, including multi-tenant architectures, permissions, and internal/admin tools.Design and manage asynchronous processing systems for background tasks and workflow orchestration.Optimize system performance and cost through practical techniques such as caching, batching, and efficient data access patterns.Create secure and extensible integration frameworks, including authentication mechanisms, APIs, and third-party connectors.Enhance backend engineering standards through observability, rigorous testing, incident preparedness, and operational best practices.Collaborate across departments to deliver features from inception to deployment while designing durable, extendable, and easily adjustable backend systems.Candidate ProfileWe are looking for someone eager to shape the AI-driven user experience of the future. We value extreme ownership, accountability, and initiative.This role is ideal for individuals who enjoy building scalable systems and enhancing observability while minimizing costs through practical optimizations such as caching, batching, and queue-based processing. You will work closely with product and machine learning teams to ensure Highlight remains reliable and high-performing as we scale.