Backend Software Engineer at hifi | New York City

Join hifi as a Backend Software Engineer and become a pivotal part of our innovative team. We are seeking a skilled engineer who is passionate about developing robust and scalable backend solutions. As part of our dynamic environment, you will work on exciting projects that challenge your technical skills and allow you to grow.

Role Overview hifi is looking for an Account Executive based in New York City. This role focuses on building and maintaining strong client relationships. The Account Executive works closely with clients to understand their goals, recommend solutions, and help them succeed with hifi’s products and services. What You Will Do Engage directly with clients to identify their needs and priorities Develop and present solutions tailored to each client Promote hifi’s products and services through clear communication Negotiate terms and agreements to support long-term partnerships What Matters Here Strong communication and listening skills Experience with negotiation and relationship management Ability to adapt solutions to each client’s situation Commitment to client success and satisfaction

OUR PURPOSETransforming Money MovementIn today's world, money should flow as seamlessly as information. At HIFI, we are on a mission to revolutionize the financial landscape by making money programmable by default, empowering developers and businesses with the tools necessary for instant, global transactions.Join us as we reimagine the financial infrastructure of the internet from the ground up.INTRODUCING THE HIFI NEW GRAD PROGRAMThis position is part of HIFI's New Grad Program—a comprehensive 3-month contract that offers early-career professionals genuine ownership, mentorship, and a pathway to full-time employment. You will be integrated into a team from day one, contributing to live projects while being guided by a senior colleague committed to your development, with the potential for a full-time role upon successful completion of your contract.We are not seeking someone with all the answers; rather, we are looking for an individual who poses insightful questions, acts with urgency, and consistently pushes for improvement.YOUR ROLEManage essential operational workflows, including vendor and partner due diligence, as well as comprehensive payment operations across fiat and stablecoin platforms.Support the Customer Success team with onboarding processes, coordinating the review and tracking of KYC/KYB documentation.Conduct strategic research on emerging trends in stablecoins, payments, and card infrastructure to help shape company strategy.Develop and maintain quantitative operational models that inform key business decisions, forecasting, and performance analysis.Identify and address operational bottlenecks, collaborating with engineering, compliance, and product teams to enhance processes.IDEAL CANDIDATECurrently pursuing (expected graduation June 2026) or recently completed a Bachelor's degree in Finance, Business, Economics, Accounting, Operations Management, or a related discipline—or possess equivalent practical experience.Demonstrate a high level of ownership and urgency, taking accountability for outcomes across complex, cross-functional initiatives.Thrive in fast-paced, high-growth environments, with the ability to adapt and excel in challenging situations.

Join our innovative team at hifi as a Frontend Software Engineer, where you will play a critical role in developing cutting-edge web applications. You will collaborate with designers and backend engineers to create seamless user experiences and responsive interfaces that meet the needs of our clients.

OUR PURPOSETransforming Money MovementAt HIFI, we believe that money should flow as freely and effortlessly as data does. Today, that’s not the case. As technology advances, customers demand instant, global, programmable money. HIFI is dedicated to meeting this demand by making money programmable by default, providing developers and businesses with the tools to transfer value at the speed of software.We are reconstructing the financial infrastructure of the internet from the ground up.JOIN THE HIFI NEW GRAD PROGRAMThis position is part of HIFI's New Grad Program — a structured 3-month contract aimed at offering early-career talent genuine ownership, mentorship, and a clear pathway to full-time employment. You will not be assigned mundane tasks; instead, you will be integrated into a team working on live infrastructure from day one, paired with a senior mentor who will guide your professional development, and you will be considered for a full-time role at the conclusion of your contract.We are seeking individuals who are curious, proactive, and committed to elevating our standards every week.YOUR RESPONSIBILITIESDevelop and maintain backend services and APIs that facilitate real money transactions at scale, ensuring full ownership of the process.Produce clean, well-tested, production-ready code and actively engage in code reviews to uphold quality standards.Participate in architectural discussions and contribute to technical design decisions alongside experienced engineers.Promptly investigate and resolve bugs and production issues with a thorough approach.Gain an in-depth understanding of financial infrastructure, including ledgering, settlement, stablecoin mechanisms, and on-chain connectivity.WHAT WE SEEKBachelor's degree in Computer Science, Software Engineering, Electrical Engineering, Mathematics, or a related field, or equivalent practical experience (expected graduation June 2026 or recent graduates).Strong understanding of computer science fundamentals, including data structures, algorithms, and systems.Proficient in at least one backend programming language (such as JavaScript, Go, Node.js) and eager to learn additional languages.Capable of writing clear, maintainable code and explaining your thought process effectively.

About madecardAt madecard, our mission is to empower homeowners by saving them time, money, and stress. Our flagship product, the Made Card, is a unique credit card tailored specifically for homeowners, offering exceptional rewards on mortgage payments, home improvements, utilities, and essential purchases. Every transaction fuels a customized home management platform where users can effortlessly oversee their home systems and appliances, stay proactive with maintenance, and access assistance ranging from AI-driven insights to on-site services precisely when needed. By integrating financial tools, valuable data, and trusted professionals, we enable individuals to gain more control, realize significant savings, and ultimately enjoy their homes more fully.We collaborate with prominent national players in the residential homeownership sector, encompassing mortgage lenders, servicers, real estate brokerages, and home improvement providers, seamlessly integrating madecard into pivotal moments of the homeowner journey. This enables us to connect with millions of households nationwide and provide tangible benefits to homeowners.Supported by esteemed investors like Village Global, Jump Capital, Recharge Capital, and Soma Capital, our leadership team possesses extensive experience in fintech, mortgage, and credit card sectors, having previously worked at Ramp, Bain Capital, JP Morgan Chase, American Express, and Morgan Stanley. We are dedicated to creating a financial and engagement platform for the next generation of homeowners, placing them at the forefront and redefining what it means to truly feel at home.About the RoleWe are seeking a Backend Engineer to join our team in building and scaling the services that undergird the Made Card and homeowner platform. In this role, you will be instrumental in the design, development, and upkeep of core systems while closely collaborating with product, frontend, and infrastructure teams. This opportunity is ideal for an individual who thrives on tackling complex backend challenges and aspires to grow within a dynamic startup environment.What You’ll DoFeature Development: Develop and maintain backend services and APIs utilizing Python.Database & Systems: Design, implement, and enhance data models across Postgres, DynamoDB, and Redis.Infrastructure: Assist in deploying and scaling applications using Kubernetes, Docker, and AWS.Collaboration: Work alongside frontend engineers, product managers, and designers to deliver comprehensive features.Code Quality: Produce clean, maintainable, and testable code while participating in code reviews and team discussions.

Company OverviewAt tennr, we are revolutionizing the referral process in healthcare. When you visit a doctor and receive a referral to a specialist, the waiting game begins. Unfortunately, patients often face delays that can last days, weeks, or even months due to overwhelmed specialists and the cumbersome manual processes involved. Our cutting-edge platform eliminates these bottlenecks by ensuring that every referral is processed promptly and accurately, allowing healthcare providers to enhance their service delivery. Powered by RaeLM™, our sophisticated technology reads, extracts, and acts on comprehensive patient information, enabling providers to capture more referrals, minimize denials, and streamline service times.Position OverviewWe are on the lookout for a Senior Backend Software Engineer who is passionate about systems architecture, data modeling, and large-scale workflow orchestration. In this dynamic role, you will be responsible for designing and implementing features end-to-end within our backend services and infrastructure, ensuring they provide direct value to our customers. Your expertise will contribute to the optimization of data schemas, the construction of resilient backend services, and the seamless integration of third-party systems.You will spearhead initiatives focused on high-volume workflow automation while emphasizing the development and enhancement of scalable data processing and machine learning infrastructure. This role entails designing and maintaining intricate workflows that harness machine learning to drive automation, alongside leading performance optimization efforts to guarantee reliability, scalability, and adherence to best practices across the technology stack.Collaboration is at the heart of our operations; you will closely partner with sales and customer experience teams to integrate customer feedback, while also working hand-in-hand with engineering colleagues to bring robust solutions to fruition. We seek an individual who embodies a founder’s mindset, excels in systems-wide thinking, and is proactive in driving projects from inception to completion.The ideal candidate will possess a rich background in backend architecture, event-driven systems, and orchestration frameworks, coupled with a demonstrable history of building production-ready systems. You will play a pivotal role in shaping the technical foundation of our platform, ensuring that it remains reliable, scalable, and adaptable as we grow.

Compensation: $170k – $250k + meaningful equityJoin Our TeamWe are seeking a talented Backend Software Engineer to become a key player in our dynamic and innovative team. At Onyx Odds, you will work closely with our founding team to design, develop, and scale our groundbreaking social sports prediction platform.As a Backend Software Engineer, you will have the opportunity to take ownership of projects from inception to production, influencing architectural decisions and contributing to the overall product vision. You'll collaborate with leadership and various business functions to shape the product roadmap and prioritize features.Lead projects through the entire software development lifecycle, ensuring robust architecture and implementation.Work alongside cross-functional teams to drive product direction and strategic prioritization.

Founding Backend Engineer – PhaselawLocation: New York City or Raleigh/Durham AreaType: Full-timeSalary: Competitive, with equity optionsAbout PhaselawPhaselaw is revolutionizing the traditional eDiscovery sector, providing in-house legal teams with innovative document production tools that eliminate the cumbersome, service-heavy processes of the past. Currently in our seed stage, we are already partnering with Fortune 500 companies and experiencing rapid growth.The RoleWe are in search of a talented Backend Engineer to join our founding team and contribute to the development and scaling of our core product. Collaborating closely with our Founders and Engineering team, you will deliver features and enhance performance across various backend systems, including databases, data ingestion, and AI systems. This is a high-ownership, high-impact position where you will play a vital role in shaping Phaselaw’s technological future.What You’ll DoFirst WeekComplete onboarding, set up your development environment, and familiarize yourself with our systems.Deploy a minor update or bug fix to acclimate to the codebase.Utilize the product to gain insights into its functionality and pinpoint areas for enhancement.First MonthDeliver two major features.By 90 DaysRelease feature updates daily/weekly, focusing on quality.Work closely with the team and clients to influence the product's evolution.What We’re Looking ForA minimum of 3 years of backend development experience, preferably in startup environments or agile teams.Proficient in Python for backend development.Extensive database expertise, particularly with Postgres and/or Elasticsearch.Familiarity with contemporary infrastructure management tools, including Terraform, Kubernetes, and CI/CD.A strong inclination for action: You deliver quickly and iterate based on feedback.A keen product sense: You understand user needs and build accordingly.

About N1:N1 is a pioneering hyper-performance blockchain network, crafted to facilitate trustless computing at an internet scale. Our team is comprised of talented individuals from prestigious backgrounds including Harvard, CMU, DFINITY, VMWare, and Galaxy Digital, and we are proudly supported by renowned investors such as Founders Fund, Kraken Ventures, SALT, and Amber Group.Position Overview:We are on the lookout for a passionate Software Engineer Intern specializing in backend systems using Rust. In this role, you will play a vital part in developing essential backend components for our blockchain network, concentrating on the aspects of networking, reliability, and scalability. Your primary responsibilities will include designing and coding critical backend software components mainly in Rust. You will also be tasked with upholding and improving best practices in software engineering within a leading open-source project.

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.

Join Normal Computing – Where Innovation Meets OpportunityThe Normal team is at the forefront of building foundational software and hardware solutions that propel technology forward, serving critical sectors such as the semiconductor industry and AI infrastructure. Our collaborative efforts span across major cities including New York, San Francisco, Copenhagen, Seoul, and London.Your Contribution to Our Vision:As a Software Engineer specializing in backend product engineering within Normal EDA, your primary responsibility will be developing systems and workflows that empower hardware engineers in the creation and verification of chips vital to modern AI technologies. Experience in the semiconductor or hardware sectors is advantageous but not mandatory.In this role, you will encounter complex technical challenges at the convergence of AI and product engineering. You will be tasked with designing solutions and implementing incremental improvements to deliver new features effectively. You will take ownership of APIs and schemas that are crucial for core product functionalities, collaborating closely with fellow engineers to enhance these systems.We are seeking engineers who are enthusiastic about tackling real-world challenges in intricate technical domains and creating systems that enable users to maximize their productivity. If you are driven to design reliable, high-performance systems and craft intuitive user experiences for AI-driven workflows, this position offers a unique opportunity to make a significant impact in the industry.

OUR MISSIONTransforming money into programmable value.At HIFI, we believe that the future of finance is a world where money can move as seamlessly as data. With the growing demand for instant, global, programmable money, we are at the forefront of this transformation. HIFI is dedicated to creating innovative tools that empower developers and businesses to handle value transactions at lightning speed.Join us as we revolutionize the financial infrastructure of the internet.WELCOME TO THE HIFI NEW GRAD PROGRAMAs part of our structured New Grad Program, this role is a 3-month contract designed to provide early-career professionals with substantial ownership, mentorship, and a pathway to full-time employment. You will engage in meaningful work from day one, collaborating with a senior colleague who will guide your development, with the potential for a full-time position upon successful completion of the program.We are seeking individuals who are curious, proactive, and eager to elevate our standards through their contributions.RESPONSIBILITIESIdentify and qualify new prospects within key sectors including fintech, payments, Web3, and enterprise through strategic outreach initiatives.Engage potential customers via email, LinkedIn, and phone, ensuring personalized communication tailored to each account.Collaborate with Account Executives during discovery calls, product demonstrations, and proposal development to advance sales opportunities.Ensure meticulous CRM management and accurate sales pipeline reporting; remember, if it's not documented, it doesn't exist.Provide valuable market insights and customer feedback to the go-to-market and product teams to refine our strategies.IDEAL CANDIDATE PROFILEPursuing or recently completed a Bachelor's degree in Business, Economics, Finance, Communications, Psychology, or a related discipline, or possess equivalent experience.A strong desire to build a long-term career in sales, beyond seeking a first job.Excellent verbal and written communication skills; you can convey your points effectively without unnecessary elaboration.Demonstrates resilience and a competitive spirit; you can handle setbacks while maintaining your drive and focus.

About ConcourseConcourse is at the forefront of revolutionizing corporate finance by developing advanced AI agents that empower finance teams. We seamlessly integrate essential enterprise data sources, enabling our AI agents to analyze data using natural language, providing insights within seconds, and facilitating informed decision-making for our clients. In less than a year since our launch, Concourse has experienced remarkable growth, with our AI agents being utilized by hundreds of high-growth companies, including notable unicorn startups such as Persona, Front, Lightmatter, and two Fortune 500 firms.Supported by influential investors including Andreessen Horowitz, CRV, YC, BoxGroup, and over 50 angel investors from leading companies like Brex, Rippling, Flywire, Deel, Jeeves, and DoorDash, we are poised for continued success.About the RoleWe are seeking a talented Backend Software Engineer to enhance and scale the foundational infrastructure that drives our AI agents. In this role, you will engage with APIs, data models, integrations, and backend systems designed to manage high-volume queries and essential finance workflows.Your mission will be to create robust, scalable backend systems that empower our AI agents to provide swift, accurate, and dependable results for our enterprise clients. You will be involved in developing new features, expanding integrations, optimizing performance, and contributing to the architecture that supports hundreds of thousands of AI-driven queries monthly.This position is ideal for someone who thrives on building backend systems, enjoys tackling complex data and integration challenges, and seeks rapid personal and professional growth in a dynamic startup environment.Key ResponsibilitiesBuild Core Backend Systems: Design and maintain backend features, APIs, and business logic that support our AI agents and user-facing applications.Own Integrations: Create integrations with ERPs, banks, CRMs, HRIS, payroll, billing systems, and other finance data sources.Create ETL Pipelines: Develop and oversee ETL processes ensuring smooth, reliable data flow from external systems into our database.Optimize Backend for Scale: Collaborate with the AI team to ensure backend systems efficiently support high-volume AI queries with exceptional performance and reliability.Take Ownership of Product Components: Manage significant portions of the backend with a strong sense of ownership and autonomy.About You2+ years of backend engineering experience with a proven track record of delivering production systems and features in a fast-paced environment.

Join our dynamic team at Antimetal as a Backend Engineer to enhance and scale the systems that power our innovative investigation and automation engine.In this pivotal role, you will develop core backend and platform services, architect solutions for scalability, and ensure our infrastructure can accommodate swift product growth.About AntimetalAntimetal is revolutionizing the future of infrastructure management. We are building a platform that investigates, solves, and prevents issues—empowering engineers to focus on creating exceptional products.Key Responsibilities:Lead the scaling of Antimetal’s AI workflow engine, processing metrics, logs, traces, and code to conduct investigations and deliver intelligible outcomes.Design and implement distributed services to orchestrate data pipelines, automate investigations, and facilitate incident responses at scale.Model and optimize relational data in SQL for high-throughput investigations and comprehensive reporting.Enhance platform reliability through performance improvements, minimizing failure modes, and ensuring scalability with customer demand.Collaborate with cross-functional teams to translate complex requirements into production-ready backend and platform features.Establish engineering standards for coding, communication, and system design, shaping the development of our product.Your Qualifications:4-8 years of engineering experience, including 2+ years in a high-growth environment with significant scaling.Demonstrated experience in building and scaling distributed systems.Proven expertise in backend API/data services.Experience with on-call responsibilities in production systems.Comfortable navigating ambiguity and taking ownership of projects.Exceptional writing and communication abilities.Proficiency in TypeScript within production environments.Preferred Qualifications:Familiarity with observability tools and practices.

About the Role Sigma Computing builds a high-performance platform designed for modern data architecture. As the team grows in New York City, the company is looking for engineers who enjoy solving complex problems and want to help make data accessible to everyone. The engineering group values collaboration and a focus on delivering solutions that matter across the technology stack. What You Will Do Take on challenging problems to create interactive experiences for data exploration and analysis within data warehouses. Work with technologies including Rust, Go, GraphQL, Node, and Kubernetes. Build backend distributed services, develop algorithms, and design APIs that power Sigma Computing's cloud applications. Investigate and resolve product or system issues by diagnosing root causes and debugging as needed. Design and implement new features to support a rapidly expanding user base. Participate in design and code reviews with peers and stakeholders to maintain high engineering standards and best practices.

About UsAt Lightning AI, the pioneering force behind PyTorch Lightning, we are dedicated to creating an innovative platform for developing, training, and deploying AI systems. Established in 2019, our mission is to seamlessly transition ideas from research to production, minimizing friction along the way.Our merger with Voltage Park, an advanced AI Factory, allows Lightning AI to offer cost-effective, large-scale computational resources alongside developer-friendly software. We equip teams—ranging from solo researchers to large enterprises—with the necessary tools for experimentation, training, and production inference, all while ensuring security, observability, and control.With a global presence and offices in New York City, San Francisco, Seattle, and London, we are supported by esteemed investors including Coatue, Index Ventures, Bain Capital Ventures, and Firstminute.Our ValuesMove Fast: We prioritize speed and precision, breaking down complex challenges into manageable tasks.Focus: By collaborating effectively, we tackle one objective at a time, ensuring high-quality feature delivery.Balance: We believe that sustained performance stems from a healthy work-life balance, allowing our team to thrive.Craftsmanship: We take pride in our work, focusing on innovation through excellence and attention to detail.Minimal: Simplicity drives our solutions, as we strive to eliminate unnecessary complexity and focus on what truly matters.What We Are Looking ForWe seek a passionate Backend Engineer to contribute to the development and scalability of the Lightning AI platform. This role encompasses working on various aspects including the frontend, CLI, API, billing, security, and integrations.As a key player, you will own significant features and lead development from concept to deployment while collaborating with a talented team of engineers, product managers, and designers. Your focus will be on speed, quality, and iterative improvement as you help shape transformative technology in the machine-learning landscape!You will be part of the Red Squad and report directly to our Director of Engineering. This is a hybrid position based in our New York City office, with an expectation of 2 days in the office per week.

About FLORAAt FLORA, we empower the new creative class with innovative tools that enhance their craft. Our intelligent platform utilizes cutting-edge AI models to facilitate creativity. With a small but dynamic team of approximately 20, we have successfully raised $52 million from notable investors such as Redpoint Ventures, Hanabi Capital, Menlo Ventures, Justin Kan, and Gabe Whaley (founder of MSCHF). Our clientele includes esteemed names in the creative industries, such as Pentagram, Lionsgate, and Nike.About the RoleWe are seeking a Senior Backend Engineer to be a pivotal part of FLORA's platform development. You will engage with our database layer, generation infrastructure, observability tools, and the services that enable a seamless real-time creative experience on a large scale.As part of our skilled team of full-stack engineers, you will leverage your extensive backend expertise to resolve our most challenging systems issues. You will take charge of complex projects, work closely with engineering leadership on architectural choices, and evolve with our backend team as we expand.Your ResponsibilitiesDesign and implement generation orchestration infrastructure capable of supporting significant scale.Enhance observability across our infrastructure to minimize failure rates and proactively identify issues before they affect users.Optimize our database layer through effective schema design, indexing strategies, and migrations as we grow.Collaborate on architectural decisions to facilitate the introduction of new features.Partner with the CTO, Product Engineering, and Intelligence Engineering teams to ensure a stable and high-performing foundation for features across all client platforms.Desired Qualifications:A minimum of 5 years of experience in building robust backend systems and operating services at scale.At least 3 years of in-depth experience with TypeScript, emphasizing type safety, error handling, and code organization.Demonstrated ability to analyze ambiguous problems and deliver well-structured solutions.Experience with queue-based architectures, including job scheduling, orchestration, and fault tolerance.Strong instincts for observability; experience in system instrumentation, dashboard creation, and utilizing data to enhance reliability.Excellent communication skills and a collaborative approach to technical decision-making.

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 N1:N1 is pioneering a groundbreaking hyper-performant and horizontally scalable blockchain network aimed at facilitating trustless computing on an internet scale.Our diverse team comprises exceptional talents from prestigious institutions such as Harvard, Carnegie Mellon University, DFINITY, VMware, and Galaxy Digital, supported by renowned investors including Founders Fund, Kraken Ventures, SALT, and Amber Group.Position Overview:As an integral member of our software engineering team, you will lead the design and development of critical backend components for our blockchain infrastructure, emphasizing networking, reliability, and scalability. Your main responsibilities will include architecting and coding foundational backend software in Rust, utilizing your extensive expertise to ensure the development, testing, debugging, and deployment of high-quality, production-grade components. You will also play a vital role in upholding and advancing superior software engineering practices within a prominent open-source project.