Principal Backend Engineer

Join HeronData as a Principal Backend Engineer, where you will play a crucial role in driving the architecture and development of our backend systems. You will work closely with cross-functional teams to deliver high-quality solutions that meet our clients' needs. Your expertise in backend technologies will be essential as you lead projects, mentor junior engineers, and ensure the scalability and reliability of our services.

About TitanTitan is a pioneering wealth management firm dedicated to revolutionizing the way individuals access financial advisory services. Our mission is to democratize wealth management, empowering every individual with a personal wealth advisor in their pocket. Unlike traditional wealth management, which often caters solely to the ultra-rich, Titan leverages cutting-edge technologies like artificial intelligence to create a platform that amplifies advisors' capabilities, making them accessible to a broader audience. With the support of renowned investors such as a16z, General Catalyst, and Sam Altman, we proudly manage over $1 billion in assets for clients nationwide.Why Join TitanJoining Titan means becoming part of a mission-driven company where your contributions will have a lasting impact. Ambitious Vision: Our goal of placing private wealth management in everyone's hands will redefine wealth accumulation for generations to come.Critical Timing: The rise of large language models (LLMs) fuels our quest to make personalized wealth management a reality for all, motivating our daily efforts.Significant Impact: As a part of our small, agile team, your contributions will be highly visible and influential in shaping the future of Titan.Dynamic Team Culture: We thrive on collaboration, working closely together in our office, alongside our founders who are deeply involved in daily operations.Competitive Compensation: At Titan, we offer attractive salary packages and equity opportunities that ensure every team member feels like an integral part of the company.Renowned Support: With backing from top-tier investors who align with our bold vision, including a16z and Y Combinator, we are poised for continued growth.Role OverviewWe are looking for a Principal Backend / Infrastructure Engineer to join our engineering team in New York City. In this high-impact role, you will be instrumental in architecting, developing, and scaling the core systems that underpin our financial platform. Collaborating with a talented team of former founders and engineers from tech giants like Google and Meta, you will focus on enhancing our backend services, trading systems, real-time APIs, data pipelines, and automated workflows, ensuring they are secure, scalable, and resilient. Your technical expertise will directly influence the reliability and performance of our platform as we scale beyond $1 billion in assets under management.

Join our dynamic team at Blacksmith as a Principal Systems Engineer, where you will play a crucial role in designing, developing, and implementing innovative systems solutions. Your expertise will guide projects from conception to execution, ensuring they meet both technical and user requirements.

Join Via, where we leverage technology to revolutionize global transportation. As a Senior Backend Engineer, you will play a pivotal role in our Platform team, contributing to innovative solutions that impact the daily commutes of thousands while minimizing environmental impact. Collaborate with a talented group of developers and DevOps engineers to build and maintain the cutting-edge infrastructure that powers our operations. This hybrid role requires you to be onsite in NYC 2-3 days a week, allowing for hands-on teamwork and collaboration.

Join dualentry as a Senior Backend Engineer, where you'll be at the forefront of developing cutting-edge backend solutions. In this role, you will collaborate with cross-functional teams to design, implement, and optimize robust server-side applications. Your expertise will be crucial in enhancing system performance, scalability, and security.

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 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.

P-1125 Summary At Databricks, we are dedicated to empowering data teams to tackle the most challenging issues facing the world today, from detecting security threats to developing cancer treatments. Our mission is to create and maintain the premier data and AI infrastructure platform, allowing our clients to concentrate on the critical challenges central to their objectives. Our engineering teams are at the forefront of innovation, delivering highly sophisticated products that meet significant global demands. We relentlessly push the limits of data and AI technology while ensuring the resilience, security, and scalability essential for our customers’ success on our platform. Trust is paramount at Databricks, and our Trust & Safety initiative is dedicated to establishing the most reliable data analytics and machine learning platform globally. Security Engineering plays a crucial role in protecting customer data from malicious threats. We seek experienced leaders like you to craft the vision and outline the strategy in this vital area.

Are you frustrated with the inefficiencies and complexities of traditional finance? So are we! At Superstate, we are pioneering innovative investment products that leverage the rapid, programmable, and regulatory advantages of blockchain tokenization.As a Staff Backend Engineer at Superstate, you will be instrumental in shaping the landscape of tokenized assets. Your expertise will contribute to the development of blockchain-integrated systems that empower investors to self-custody their financial assets. You will design robust systems, APIs, and infrastructure aimed at enhancing the efficiency of financial operations.

Founding Backend EngineerCompany Overviewfuku is an innovative and rapidly expanding social shopping platform co-founded by Phoebe Gates and Sophia Kianni. With a user base exceeding 350,000 and an impressive 90% retention rate, fuku is at the forefront of transforming online shopping through community engagement, personalized experiences, and AI-driven recommendations. Join our dynamic, mission-oriented founding team and play a key role in defining the future of social commerce.Key Job Information- Location: New York City (relocation support provided)- Work Type: On-site, full-time- Required Experience: 3+ years- Salary Range: $160,000 – $200,000 per year- Visa Sponsorship: Available for H-1B, O-1, OPTRole SummaryIn the role of Founding Backend Engineer, you will take ownership of and enhance fuku's data infrastructure, essential for powering search, personalization, and recommendations. Collaborating closely with the CTO and machine learning engineers, you'll design robust data pipelines, architect backend systems, and establish best practices for backend engineering. This is a unique founding opportunity where you will have substantial product and technical ownership.Responsibilities- Design and implement backend systems for fuku's recommendation engine and shopping experience.- Develop and maintain data pipelines for processing large-scale datasets from diverse sources.- Create reusable APIs and microservices for core product functionalities.- Collaborate with the ML team to integrate machine learning models into production.- Ensure system reliability, scalability, and maintainability across the backend stack.- Set and uphold backend engineering standards and technical best practices.Requirements- At least 3 years of backend engineering experience.- Strong expertise in Python and cloud platforms (AWS/GCP).- Practical experience in building data pipelines and microservices architectures.- Familiarity with Airflow, gRPC, GraphQL.- In-depth knowledge of search and vector database technologies, including: - HNSW (Hierarchical Navigable Small World) - OpenSearch / Elasticsearch - Approximate Nearest Neighbor (ANN) frameworks- Exceptional system design and problem-solving capabilities.- Willingness to work in-person in New York City (relocation assistance provided).Benefits & Perks- Competitive salary with equity in the company.- Comprehensive health, vision, and life insurance.- 401(k) plan with company matching.- Complimentary daily lunches, snacks, and late-night Ubers.- Opportunity to work closely with founders and early team members, influencing product and technical direction.Interview Process1. Introductory chat with the Head of Recruiting2. Technical interview3. Coding assessment4. CTO interview5. Onsite interview (technical + cultural fit)6. Offer extended7. Onboarding

About Hook MusicHook Music is a pioneering social music platform, supported by elite investors, dedicated to revolutionizing music discovery, enhancing fan engagement, and fostering creator development. We transform beloved songs into interactive sounds, allowing fans and creators to reimagine music through simple, remix-friendly experiences that require no learning curve. By collaborating directly with artists, labels, and rights holders, Hook Music ensures that music is discovered, shared, and expressed in ways that honor and reward its creators. At Hook, music is not merely consumed — it is experienced, expressed, and personalized.Role OverviewWe are on the lookout for a talented Backend Engineer (Product & APIs) to design, develop, and scale the APIs and fundamental systems that drive Hook Music’s product experience across both mobile and web platforms. In this role, you will take ownership of the backend services that facilitate content creation, discovery, user profiles, social interactions, rights management, and much more.As a product-oriented backend engineer, you will collaborate closely with frontend engineers, AI and recommendation teams, product managers, and designers to ensure our application is fast, reliable, and scalable. You will contribute to shaping system architecture, enhancing performance, and creating clean, extensible APIs that support rapid experimentation and growth.Your ResponsibilitiesDesign, develop, and maintain scalable backend services and APIs that empower the Hook Music product.Work closely with frontend engineers to establish and implement clean, efficient API contracts.Architect systems that accommodate high-throughput content creation, media processing, and social interactions.Optimize performance, reliability, and latency across core product flows.Contribute to database design, schema evolution, and data modeling strategies.Implement monitoring, logging, and alerting mechanisms to ensure system health and observability.Engage in technical design discussions to shape long-term backend architecture.Support experimentation and rapid iteration by building flexible, modular systems.

About FLORAAt FLORA, we empower the new creative class by developing innovative tools that transform the way professionals engage with AI. Our intelligent canvas supports a diverse range of creative industries, serving clients such as Pentagram, Lionsgate, and Nike. With a dedicated team of around 20 and an impressive $52 million in funding from industry leaders like Redpoint Ventures and Menlo Ventures, we are on a mission to redefine creativity.About the RoleWe are seeking a Staff Backend Engineer to lead the development of FLORA's core platform. As the technical authority, you will be responsible for our backend architecture, including the database layer and generation infrastructure, ensuring a seamless real-time experience for our users as we scale.This is a pivotal role in our growth journey. We need a passionate backend architect who will take ownership and guide our systems to accommodate a tenfold increase in demand. You will have significant influence over our technical direction and play a crucial role in shaping our backend team’s future.Your ResponsibilitiesDesign and implement a generation orchestration layer capable of handling increasing user demand and operational volume.Enhance observability across our infrastructure to reduce failure rates and proactively address issues.Optimize our database architecture through effective schema design, indexing strategies, and migration plans.Make strategic decisions regarding vendors and architecture to enable new feature development.Collaborate closely with the CTO, Product Engineering, and Intelligence Engineering teams to ensure a robust and efficient foundation for our client features.Qualifications7+ years of experience in building scalable backend systems.5+ years of expertise in TypeScript, with a strong emphasis on type safety and error management.Demonstrated ability to design and maintain reliable systems.Familiarity with advanced queue-based architectures, including job scheduling and fault tolerance.Strong instincts for observability, with experience in system instrumentation and dashboard creation.A proven track record of leading technical initiatives, guiding teams towards innovative solutions.

Overview: Spur is the AI QA Engineer for every company.Location: New York CityAt Spur, we create groundbreaking technology designed to redefine quality assurance: autonomous browser agents that think, explore, validate, and self-heal like actual users. We aren’t just another testing tool; we are revolutionizing the way digital teams deliver with confidence.The market response has been resounding. Leading brands such as Alo Yoga, Living Spaces, HelloFresh, Nextdoor, and Abercrombie & Fitch are actively engaging with us. Demand is skyrocketing, sales cycles are swift, and our product delivers — teams can go live in days, not months.Our elite team comprises builders from DeepMind, Figma, and former founders who are producing at a pace that larger companies cannot match.Our Mission: We aim to empower our customers to deliver exceptional digital experiences.Explore our Manifesto: https://www.spurtest.com/founders-letterThe RoleAs the founding engineer specializing in infrastructure and backend, you will design the core architecture of Spur’s platform—defining, building, and scaling critical infrastructure that powers our web agents.You will oversee our entire stack from top to bottom, orchestrating vast fleets of browsers and web agents in the cloud while optimizing them for massive scale. Collaborating closely with the founders, you will tackle pioneering infrastructure challenges that have a direct impact on our customers and set the benchmark across our stack, from low-level infrastructure to the user experience delivered by our agents.What You Will DoBuild and scale our core infrastructure to deploy and manage thousands of browser and web agents daily.Design, implement, and maintain our clusters, CI/CD processes, observability, and best practices.Rapidly iterate in collaboration with product, engineering, and the founders.Bonus PointsExperience with distributed task queues and optimizing performance/scalability.A history of generating impact in small teams and scaling infrastructure from the ground up.You Will Excel Here If YouHave 5+ years of experience designing, deploying, and managing infrastructure at scale.Possess deep expertise in Docker and cloud technologies.

About AlphaSense: AlphaSense empowers the world's leading companies to eliminate uncertainty in decision-making. Our platform, founded on advanced AI technology, delivers essential insights from both public and private content, including equity research, company filings, event transcripts, expert calls, news, trade journals, and proprietary research. In 2024, AlphaSense enhanced its mission by acquiring Tegus, furthering our goal to provide professionals with AI-driven market intelligence. This collaboration will accelerate our growth and innovation, combining our product and content offerings to deliver even deeper insights from a wealth of information. Trusted by over 6,000 enterprise clients, including a majority of the S&P 500, AlphaSense has been at the forefront of market intelligence since its inception in 2011. Headquartered in New York City, we have grown to over 2,000 employees globally, with offices in the U.S., U.K., Finland, India, Singapore, Canada, and Ireland. Join us on this exciting journey!About the Team:Our dynamic Product & Engineering team thrives on innovation, collaboration, and continuous enhancement of our platform. We foster an engaging work environment that encourages personal and professional growth while developing pioneering technology that shapes the future of AI and search.At AlphaSense, we value diverse backgrounds and perspectives as vital to our success. We are dedicated to fostering an inclusive workplace where every employee feels respected and empowered to express their authentic selves.About the Role: We are on the lookout for a Principal Engineer to spearhead the design, evolution, and reliability of our global financial data extraction and normalization platform. This system processes filings in various formats (HTML, PDF, APIs, spreadsheets), utilizes a mix of AI and deterministic methods to extract and standardize financial data, and delivers reliable, traceable outputs at scale to financial services teams and customers.In this role, you will own the self-sourcing and extraction foundation utilized by multiple teams across the organization. Currently, human validation acts as a safeguard. Your objective is to systematically diminish human reliance by enhancing system accuracy, confidence, and trust, without compromising speed or scalability.

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 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.

Join Our Team as a Staff Backend EngineerLocation: London or New York CityWork Arrangement: Onsite | Full-timeCompensation: CompetitiveAt mlabs, we are a leading technology development firm specializing in the infrastructure that powers the world’s largest digital asset launchpads. With around $1 billion in daily transaction volume, our platform operates at the forefront of the crypto industry, demanding systems engineered for ultra-low latency and exceptional throughput under high concurrency.We are on the lookout for a Staff Backend Engineer to tackle our most challenging technical problems. This role is critical and impactful, set in a dynamic, in-person environment. Our team comprises high-agency builders who prioritize speed, immediate results, and exceptional engineering judgment. This position is tailored for an engineer who excels under pressure and revels in solving complex, cross-disciplinary challenges.Key Responsibilities:System Ownership: Take responsibility for resolving intricate backend issues, improving performance bottlenecks, scaling limits, and ensuring system reliability under intense load.Architectural Leadership: Define the technical strategy for backend systems through thoughtful architectural choices that reconcile swift delivery with long-term viability.Distributed Systems Design: Create, implement, and manage high-impact distributed services that serve a vast global audience daily.Problem Resolution: Anticipate systemic challenges and lead efforts to resolve them, navigating ambiguity and cross-functional complexities.Engineering Excellence: Elevate the backend engineering team's standards through thorough design and code reviews, mentorship, and exemplifying superior engineering judgment.Interview Process:Our selection process is designed to ensure a strong fit for both technical skills and cultural alignment:Recruiter / HR Call: Initial screening and background assessment.Technical Interview I: In-depth evaluation of backend expertise and problem-solving capabilities.Technical Interview II: Advanced exploration of distributed systems and architectural knowledge.Final Interview: Comprehensive discussion focusing on strategic insights and role expectations.

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 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.

OverviewJoin our dynamic team as a Senior Backend Engineer where you will architect, develop, and scale essential backend systems that support high-traffic consumer applications and internal platforms. You will take ownership of vital services and APIs, engage with high-throughput distributed architectures, and collaborate closely with product, machine learning, and engineering teams to deliver seamless, low-latency experiences for our users.About PhiaPhia has successfully secured $43M in funding from top-tier investors including Notable Capital, Khosla Ventures, and Kleiner Perkins to develop the AI alignment layer for the commerce sector. In less than a year, Phia’s consumer shopping assistant has amassed over one million users and established partnerships with over 6,200 retail brands, generating billions in annual gross merchandise volume. Each month, Phia contributes millions in sales for its partners and has achieved an impressive 11× revenue growth since its inception.As AI-driven vertical agents revolutionize various industries, Phia is at the forefront of transforming commerce from a fragmented and impersonal experience into a more intelligent, trustworthy, and user-centric journey. This trust serves as our competitive edge, positioning us as the comprehensive shopping destination for the next generation of consumers.Phia fosters a lean, high-ownership culture with a startup mentality. If you are eager to work in a fast-paced environment and tackle complex challenges within consumer AI and commerce, we invite you to join us.