Senior Backend Software Engineer

CVector is dedicated to revolutionizing economic optimization and AI-driven predictions across energy and manufacturing sectors.Our technology seamlessly integrates critical decision-making factors that impact cost, reliability, and profit margins, providing a unified decision layer that forecasts future scenarios, simulates potential outcomes, and optimizes operational strategies. This allows industrial plants to operate closer to their maximum economic potential daily.This position requires in-office attendance at our New York City headquarters four days a week. CVector serves clients nationwide and operates in challenging industrial environments.Role OverviewAs a Senior Software Engineer specializing in Backend and AI Infrastructure, you will be instrumental in advancing CVector’s backend platform. Your focus will be on developing time-series data systems, AI-enhanced analytics, cloud infrastructure, and data ingestion pipelines that underpin our client-facing applications and internal modeling tools.This role is ideal for engineers who thrive on working closely with data and infrastructure, possess excellent architectural judgment, and are eager to engage with AI systems, databases, and distributed backend services. You will take ownership of complex systems, lead significant technical migrations, and influence the integration of intelligence into industrial energy workflows.You will work in close collaboration with product, modeling, and frontend engineers, significantly impacting the platform's direction, reliability, and scalability for the long term.Key ResponsibilitiesAs a Senior Software Engineer, your contributions will span various interconnected domains:Intelligent SystemsTranslate customer domains and operational workflows into effective prompts and AI system interfaces.Design, implement, and refine evaluations for AI outputs.Incorporate customer feedback and reinforcement signals to enhance system performance.Optimize context selection, retrieval, and trace collection to elevate output quality.Fine-tune smaller models using collected traces to enhance speed while maintaining performance standards.Evaluate and assimilate new AI platforms and models as they emerge.Support the training and deployment of large, time-series-specific models.Backend Platform and Data InfrastructureOversee migrations and enhancements of our time-series data schemas and storage systems.Update and manage PostgreSQL and associated database infrastructure.Develop and sustain data connectors for industrial and external systems.Lead improvements to MQTT-based data ingestion pipelines.Transition PostgREST to a GraphQL-based framework and evolve our API architecture.

Join Brellium as a Senior Backend / Infrastructure Engineer in the vibrant heart of New York City. In this pivotal role, you will be responsible for designing, implementing, and maintaining robust backend systems that power our innovative solutions. You will collaborate with cross-functional teams to ensure seamless integration and high performance of our applications.

Senior Backend Engineer – Transform Telecom Infrastructure for NextGenAt OXIO, we are revolutionizing the telecom landscape with the world’s first Telecom-as-a-Service (TaaS) platform. Our mission is to democratize telecom, empowering brands and enterprises to own and manage proprietary mobile networks tailored to their unique customer needs. By integrating multiple networks into a single, cloud-based platform, we provide a modern SaaS solution that offers full network access, delivering exceptional business intelligence and insights to enhance understanding of customer and machine behavior. With a relentless focus on innovation, OXIO enables companies to establish a robust telecom presence while unlocking unparalleled customer insights.As we expand our capabilities, we are looking for an experienced Tech Lead to contribute to our flagship BrandVNO platform. In this pivotal role, you will lead the development of our software development kit (SDK), empowering clients to craft groundbreaking telecom experiences within their mobile applications.

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.

About Pangram LabsAt Pangram Labs, we are dedicated to ensuring authenticity through the development of cutting-edge AI detection systems. Our team is at the forefront of research, creating algorithms and products that integrate our advanced technology into everyday life.We seek individuals who are proactive, mission-focused, and passionate about innovation to join our in-person team based in Brooklyn, New York.About the RoleWe are on the lookout for a Senior Software Engineer with a backend emphasis to design, implement, and scale our production systems, which support our core technology for a rapidly expanding user base.In this senior-level position, you will be responsible for the backend infrastructure that drives Pangram's AI detection platform. You will have the autonomy to make architectural decisions, tackle complex scaling challenges, and ensure that our systems remain reliable and efficient as user demand increases. Collaborating closely with our frontend and machine learning teams, you will work primarily with our Django backend and AWS infrastructure.What You'll DoDesign and develop scalable backend services and APIs to deliver AI detection features effectively.Ensure the reliability, performance, and observability of our production systems.Architect and manage data pipelines, caching layers, and service infrastructure using AWS.Collaborate with machine learning engineers to deploy and manage machine learning models in production.Identify and resolve performance bottlenecks as user traffic and system complexity increase.Establish and enhance engineering best practices related to testing, deployment, and incident management.

About UsAt Adaptive, we are a pioneering vertical AI company with a passionate team of 40 dedicated professionals, creating an AI-native ERP solution tailored for the real estate and construction industries. Our rapid growth has attracted over 600 clients and significant funding of $26 million from prestigious investors such as Emergence, a16z, and a host of angel investors from renowned firms including Brex, Ramp, Airbase, Square, and Shopify.Why You Should Be Part of UsEmpowering Local CommunitiesJoin us in serving the small businesses that are the backbone of our communities. The local coffee shop, the new residences sprouting up, and the ADUs addressing housing shortages are all projects driven by our clients—individuals who are deeply rooted in their neighborhoods and passionate about their work. These skilled artisans and builders are the creators of spaces that foster connection and memories.Collaborate with a World-Class Team in Vertical AIOur culture is steeped in collaboration, excellence, and shared experience. With a strong foundation in finance, technology, and construction, we are positioned to lead in a booming market. With your talents, we can continue to innovate and expand our impact.Your RoleWe are thrilled to invite a Senior Backend Software Engineer to join our dynamic team at Adaptive! Your expertise will play a crucial role in shaping our engineering initiatives and ensuring the delivery of high-caliber software solutions.Reporting to the VP of Engineering, you will collaborate closely with a dedicated engineering and product team of 15, significantly contributing to the architectural design, development, and optimization of our innovative products.Key ResponsibilitiesLead the execution and successful delivery of backend and infrastructure-focused projects in collaboration with the product and design teams.Ensure that backend systems are secure, scalable, resilient, and optimized for performance as we expand.Align technical solutions with business objectives and product vision.Facilitate technical discussions and decision-making processes to ensure alignment with overall company strategies.Demonstrate best practices by writing high-quality, maintainable, and robust code.

Join Centari - A Leader in Deal IntelligenceAt Centari, we are revolutionizing high-stakes dealmaking by unlocking the potential of private deal data. As we develop the future's deal intelligence platform for law and finance, we go beyond mere automation, embracing a data-driven approach to empower negotiation teams globally with strategic insights. Our proprietary Deal Reasoning Engine transforms complex documents into invaluable knowledge, ensuring our clients have the upper hand in negotiations.Our dynamic team consists of attorneys, financial experts, and engineers who thrive in a hybrid, cross-cultural environment. We are proud to be supported by leading enterprise AI investors, including GTMfund, former DoorDash board member Jeremy Kranz, Seamless co-founder Andy Appelbaum, Jack Altman, South Park Commons, and Recall Capital.We embrace complexity, as it is the breeding ground for innovation. If you are a builder who excels in ambiguity and embodies radical ownership, we want to connect with you.For further details, visit centari.com or follow us on LinkedIn.Role OverviewWe are seeking a Senior Backend Software Engineer to join our innovative product team. You will play a pivotal role in designing and developing Centari's core AI technology. Collaborating with fellow engineers who share a passion for action, you will write code, influence product direction, engage with clients, and drive projects from concept through to implementation.Our technology stack includes Go and React/TypeScript, utilizing state-of-the-art LLM technologies across our infrastructure, search, and persistence layers. If you have a passion for building impactful LLM applications and enjoy tackling complex challenges, we want to hear from you.

Join our dynamic team at posh as a Senior Backend Software Engineer specializing in AI. In this pivotal role, you will design, develop, and optimize scalable software solutions that power our innovative AI products. Collaborate with cross-functional teams to deliver high-quality technical solutions while enhancing user experience and functionality.

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.

About DecagonDecagon stands at the forefront of the conversational AI revolution, enabling brands to provide exceptional concierge-level customer experiences. Our cutting-edge technology empowers renowned enterprises such as Avis Budget Group, Block’s Cash App and Square, Chime, Oura Health, and Hunter Douglas to implement AI-driven agents. These agents facilitate personalized interactions across all communication channels including voice, chat, email, and SMS.Our vision is to transform the landscape of customer interactions, moving beyond traditional support tickets and hold music toward expedited resolutions, enriched conversations, and stronger relationships. We are proudly supported by prestigious investors such as a16z, Accel, Bain Capital Ventures, Coatue, and Index Ventures, all of whom share our ambitious vision.As an in-office company, we thrive on a collective commitment to excellence and speed. Our core values—Just Get It Done, Invent What Customers Want, Winner’s Mindset, and The Polymath Principle—guide our collaborative efforts and professional growth.About the TeamThe Infrastructure team is responsible for designing and maintaining the essential frameworks that drive Decagon’s operations, including networking, data management, machine learning serving, developer platforms, and real-time voice communication. We collaborate closely with product, data, and machine learning teams to create high-scale, low-latency systems that meet stringent service level objectives and offer exceptional developer experience.Our team focuses on five critical areas:Core Infrastructure: Our foundational cloud architecture encompasses networking, computing, storage, security, and infrastructure-as-code, ensuring reliability, scalability, and cost-effectiveness.Data Infrastructure: We develop streaming and batch data platforms that drive analytics and business intelligence while enabling customer-facing telemetry for both customer-managed and on-premises environments.Machine Learning Infrastructure: Our platforms support GPU and model serving for large language model inference, featuring multi-provider routing and capabilities for on-premises or air-gapped deployments.Developer Experience Platform: We focus on continuous integration and deployment (CI/CD), streamlined processes, and essential services that facilitate fast, safe, and consistent shipping across teams.Voice Infrastructure: Our telephony and WebRTC stack ensures ultra-low-latency, high-quality voice communication, supported by comprehensive observability.Our mission is to deliver extraordinary support experiences where AI agents collaborate with human operators to resolve challenges swiftly and accurately.About the RoleWe are seeking a Senior Infrastructure Engineer who will play a pivotal role in shaping our infrastructure landscape and enhancing the efficiency and performance of our systems.

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.

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.

Join JuniorAt Junior, we are on a mission to revolutionize the investment research process for private market investors through innovative LLM-powered tools. Our esteemed clients include some of the top 10 private equity and consulting firms globally, collectively managing billions in investments annually. As a profitable and bootstrapped startup, we have a dynamic team of 24 professionals based in London and New York City.Learn more about our mission and values here. Role OverviewAs a Senior Backend Engineer, you will play a pivotal role in building and scaling the systems that drive our AI-enhanced research platform. This systems-level position is a perfect fit for engineers passionate about data flows, orchestration, and optimizing performance across complex distributed environments.Being one of our initial engineering hires, you will have the exceptional opportunity to:Deliver solutions rapidlyDesign and scale backend systems that facilitate high-throughput LLM interactions, vector searches, and multi-agent orchestration.Integrate AI infrastructure across various model providers, data stores, and internal APIs to construct cohesive and high-performing systems.Enhance reliability and observability, aiding in the evolution of our database systems (Postgres / ClickHouse) and job orchestration mechanisms.Prototype new backend functionalities (retrieval pipelines, caching layers, async task queues) to expedite our development processes.Influence our engineering culture About YouWe seek product-focused backend engineers who:Are based in NYC, as we operate 5 days a week in the office.Are enthusiastic about the fusion of AI infrastructure and systems design.Possess experience in leading projects from inception to completion.Are eager to influence product decisions.Are proficient in our technology stack: Next.js, TypeScript, PostgreSQL.Feel a constant drive to build faster.

Join Posh as a Senior Backend Software Engineer (AI)At Posh, we are on a mission to combat digital loneliness and foster genuine human connections. Our platform empowers individuals to create real-life communities based on shared interests, bridging the gap between people. Founded by passionate event organizers, we have rapidly grown to over 7 million users, secured $70 million in funding, and facilitated over $300 million in transactions.About the RoleWe are seeking a talented Senior Backend Engineer to join our innovative AI R&D pod. This small, agile team is focused on crafting the future of AI-driven product experiences at Posh. In this backend-centric position, you will play a key role in developing scalable, intelligent systems that power our AI functionalities. Your responsibilities will include designing and deploying complex Multi-Agent Systems, advancing beyond basic solutions to create autonomous, user-friendly interactions.Collaboration will be key, as you will work alongside frontend engineers and product designers to integrate cutting-edge AI tools into our platform. Expect to develop robust APIs, architect data flows for evaluations and fine-tuning, and explore novel approaches to leverage AI within our infrastructure. This is an exciting opportunity to lay the groundwork for the backend of our AI products, while delivering experimental features to a large, engaged user base.This position requires a full-time, in-office commitment at our SoHo NYC location.

About KiddomKiddom is an innovative educational platform dedicated to enhancing student equity and growth. By combining high-quality instructional resources with interactive digital learning, Kiddom enables schools and districts to take control of their curriculum. This results in personalized learning experiences that cater to the distinct needs and aspirations of local communities. The platform is enriched with insightful data for teachers and leaders, fostering continuous improvement in instructional strategies, school programming, and professional development.As a member of the InfraOps team, you will play a crucial role in supporting Kiddom's engineering efforts by developing a scalable and sustainable infrastructure that aligns with our company objectives. This is a unique chance to join a small, skilled team during a pivotal moment as we transition from Series C to D funding. You will have the autonomy to influence your work significantly, embracing a variety of tasks that reflect your expertise and enthusiasm.Key Responsibilities:Promote and cultivate a robust DevOps culture at Kiddom by collaborating with teams to establish best practices and guide both new and existing services.Implement Infrastructure as Code (IaC) to ensure confidence in automated, repeatable processes.

At Profound, we are dedicated to empowering businesses to comprehend and manage their AI presence effectively. As an Infrastructure Software Engineer, you will play a pivotal role in building and scaling the systems that facilitate our rapid expansion. Your primary focus will be on ensuring that our infrastructure is not only highly available but also cost-efficient and capable of managing significant traffic and compute demands. You will collaborate closely with engineers across product, research, and operations teams to design scalable architectures, streamline deployment processes, and enhance system observability.Your ResponsibilitiesDesign and maintain core infrastructure across diverse cloud environments.Develop infrastructure-as-code workflows to automate deployment and scaling processes.Enhance monitoring, logging, and alerting systems to ensure system reliability.Oversee CI/CD pipelines to facilitate seamless deployments.Assist in disaster recovery planning to guarantee high system availability.Collaborate with product and research teams to design architectures that can scale with increasing workload demands.Identify and resolve performance bottlenecks in compute, storage, and networking.Implement security best practices and compliance frameworks across the infrastructure.

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.

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.

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.