Senior Full Stack Software Engineer

About Us:At Zealthy, we are dedicated to revolutionizing healthcare by ensuring that high-quality services are accessible to everyone, regardless of their location. Our mission is to develop the largest and most trusted virtual healthcare platform in the world, transforming the delivery of care for individuals everywhere.Founded by a successful healthcare entrepreneur with a history of scaling businesses to impressive valuations, Zealthy is poised for sustainable growth as we strive to fulfill our ambitious vision. Our relentless focus on quality and accessibility is at the core of everything we do.Our team is committed to making a difference in patients' lives. While our in-office work culture typically runs Monday to Friday and often extends beyond standard hours, the true satisfaction comes from the impact we make. As a full-time team member, you will not only contribute to shaping the future of healthcare but also enjoy the benefits of equity ownership, as we believe in sharing our success with every contributor.If you are not ready to fully commit to your role and contribute to our vision of creating the world's largest and highest quality telemedicine company by working on-site four days a week, we kindly ask you to refrain from applying.Join us in redefining the future of healthcare.The Role:We are currently seeking a dedicated Full Stack Developer to join us full-time. Please note that this is an in-person role located in New York, NY. If you are looking for remote or hybrid opportunities, this position may not be the right fit for you.What You'll Do:You will begin your journey as a Full Stack Software Engineer at Zealthy, joining a team of five full-time engineers. You will work closely with the Founder/CEO, who oversees product development. Your initial focus will be on iterating our early product build to ensure it’s primed for scaling and enhancing access to high-quality healthcare.Participate in daily standup meetings, weekly sprint discussions (or a more fluid Kanban process), and hold yourself accountable to an ambitious product development roadmap.Being an early-stage startup, you will often wear multiple hats, engaging in both front-end and back-end development, and possibly taking part in or leading system architecture or DevOps decision-making.As the organization grows, there will be opportunities for you to step into a leadership role, should your performance be strong and you express a desire to lead. This will be an ongoing conversation as you integrate into the team.

Role Overview rockstar-3 is hiring a Senior Full-Stack Engineer in New York, NY. This role focuses on building and improving applications across both front-end and back-end. The work centers on creating software that supports user needs and business goals. What You Will Do Develop and maintain applications using front-end and back-end technologies Collaborate with team members to design features and solve technical challenges Contribute to projects that improve user experience and support business growth Location This position is based in New York, New York, United States.

Join our innovative team at Vantage as a Senior Full Stack Engineer. In this role, you will leverage your expertise in both front-end and back-end technologies to develop and maintain robust applications. You will collaborate with cross-functional teams to deliver high-quality software solutions, utilizing modern frameworks and best practices.

About Standard BotsAt Standard Bots, we aim to democratize real-world automation, merging the digital and physical realms to enhance productivity across diverse industries. Our innovative applications and APIs empower individuals and developers alike to tackle challenges without needing extensive backgrounds in robotics or automation. With a strong emphasis on user-friendliness, we bring transformative potential to new users and sectors.Your Role:We are seeking experienced technical leaders to help shape the future of robotics using modern software engineering methodologies. As a Senior Full-Stack Software Engineer, you will collaborate with fellow engineers, leadership, and users to enhance products that significantly impact our users and unlock new opportunities for them. Location and BenefitsThis position is hybrid, requiring 3 days a week onsite at our NYC office, conveniently situated near Grand Central Station. Our office is equipped with robots for demonstrations and testing!Key Responsibilities:Identify, scope, and lead impactful technical and user-facing projects.Provide strategic technical guidance to leadership.Mentor and support fellow engineers in their technical and personal development.Drive technical decision-making through hands-on, in-depth work.Technology Stack:Front-end: React, TypeScriptBack-end: Node.js, Python, C++Containerization: KubernetesVirtualization: DockerCI/CD: GitHub ActionsWho You Are:No prior experience in robotics is required or preferred.We seek engineers who are motivated, optimistic, innovative, and resourceful. While a robotics background is not needed, we find candidates thrive when they are enthusiastic about this domain and eager to apply their skills in a new context.Our ideal candidate will engage in approximately 70% back-end and 30% front-end work, with flexibility to adjust focus as needed.

About the RoleJoin april as a Senior Full-Stack Engineer, where your innovative mindset and data passion will contribute to revolutionizing tax solutions for millions. We're seeking a talented individual ready to lead projects, enhance customer experiences, and drive professional growth. Based in the New York City metropolitan area? You'll need to collaborate on-site at least three days a week.Key ResponsibilitiesTake ownership of end-to-end projects that impact millions of users, from concept to deployment.Collaborate with product management and UX teams to define product specifications and ensure seamless execution.Architect robust system designs and evaluate tool selections to optimize performance.Develop cloud-native microservices that enhance our platform's functionality.Mentor team members and elevate our technology stack and practices.

About the Role: Join our distinguished team at agencywithin as a Senior Full Stack Engineer, where you will be instrumental in developing both frontend and backend services for Brkfst. Your role will involve close collaboration with our data science team to host models and provide them through APIs. We are searching for engineers who embody a 'bias to ship' mentality and possess a strong sense of urgency. Our aim is to build compact teams of highly skilled professionals capable of autonomously solving problems and self-organizing to achieve our goals.

About LiveFlowAt LiveFlow, we're revolutionizing the accounting and finance landscape by developing a cutting-edge platform that empowers lean finance teams to efficiently manage expansive enterprises.Having successfully secured over $21 million in funding from prestigious investors such as Y Combinator, YC Continuity, Valar, Seedcamp, WndrCo, Moonfire, and Bradley Horowitz (VP Product, Google), we've positioned ourselves as a frontrunner in the industry.Our platform is already assisting thousands of companies in optimizing their financial operations, evidenced by our hundreds of 5-star ratings on G2.Our founding team boasts experience from Europe's fastest-growing fintech, Revolut, which fuels our ambition and innovation. Why Join Our Team?At LiveFlow, you have the unique opportunity to shape your role based on your skills, passions, and aspirations.We encourage you to work intelligently, share your insights, and engage deeply with our mission and methodologies. Your contributions will be essential in cultivating an inspiring workplace culture and scaling our organization as we grow.Are you a problem solver? Our enthusiastic customers are eagerly waiting for the innovative solutions you'll bring forth. We face a multitude of stimulating challenges—both technical and non-technical—and while we may not have all the answers yet, we're committed to asking the right questions every day.If you take pride in customer satisfaction and are excited to contribute to a product that brings value, while maintaining a balance between detail and progress, we want to hear from you!

About UsAt Valdera, we empower manufacturers to turn their innovative ideas into reality by revolutionizing material sourcing. Our platform simplifies the process of identifying top-tier materials and suppliers, enabling manufacturers to create high-quality products at scale and distribute them to millions globally.As a rapidly expanding team, we have established a solid reputation for collaborating with Fortune 500 industrial manufacturers, beauty brands, and chemical firms. We seek passionate, talented individuals who excel in dynamic, high-performance environments and are eager to accelerate their career growth.Our culture is designed to empower exceptional talent to tackle significant challenges, work alongside industry leaders, and witness the tangible impact of their contributions. If you desire a fast-paced environment where your ideas can influence change, Valdera is the perfect fit for you.Join us in shaping the future of manufacturing.

Join Grow Therapy as a Senior Full Stack Software Engineer, where you will play a pivotal role in designing and developing innovative software solutions. You will collaborate with cross-functional teams to enhance our platform and deliver exceptional user experiences. This position offers the chance to work on cutting-edge technologies and contribute to our mission of improving mental health care.

About FinFin is an innovative payments platform designed for high-value, global, and instantaneous transactions. As a Series A-stage company, we are backed by prestigious investors such as Sequoia and Circle. Leveraging stablecoins, Fin allows both individuals and businesses to transfer millions of dollars within seconds—whether to other Fin users, directly into bank accounts, or across cryptocurrency networks. By merging the speed of crypto with the reliability of traditional finance, Fin is redefining global money movement. If financial institutions and payment solutions were to be reinvented today, they would embody the principles of Fin.Role OverviewWe are seeking a Senior Full Stack Engineer to join our pioneering team and help shape the future of money movement at Fin. In this role, you will collaborate closely with our CEO, CTO, and a team of senior engineers to design and deliver essential product experiences, integrate with payment partners such as Stripe and PayPal, and construct the systems that enable Fin to process millions of transactions securely and efficiently.This position offers significant autonomy, allowing you to take ownership of projects from conception to deployment, enabling you to see your contributions in action with real users swiftly. If you are passionate about crafting intuitive products atop complex systems and are eager to revolutionize global payments, we would love to connect with you.We respect your time: our hiring process focuses on practical system design and architectural discussions, avoiding unnecessary coding challenges or unpaid take-home assignments.Key ResponsibilitiesDesign, develop, and launch full-stack features across our web and mobile platforms, encompassing APIs, services, and user interfaces.Take full ownership of projects: collaborate with product and leadership to define requirements, design systems, implement solutions, test, and deploy to production.Integrate third-party payment and financial APIs, including processors, compliance tools, and identity verification services.Develop scalable, high-performance services capable of handling real money transfers with exceptional reliability and observability.Maintain high standards for code quality through clean abstractions, thorough testing, and constructive code reviews.Work closely with product, design, and operations teams to ensure that our offerings are user-friendly, even when the underlying systems are complex.Qualifications for SuccessExtensive experience with TypeScript and Node.js. We primarily operate in a TypeScript environment.Proficiency in building full-stack applications and working with both frontend and backend technologies.Strong understanding of RESTful APIs and microservices architecture.Experience integrating with third-party payment systems and financial APIs.Ability to write clean, maintainable code and conduct thorough code reviews.Excellent problem-solving skills and a proactive approach to challenges.Strong communication skills, with the ability to work collaboratively in a team-oriented environment.

About UsAt Baton Corporation, we are pioneering the technology behind pump.fun, the foremost memecoin launchpad currently operational. Our systems are engineered for low latency and high throughput, operating under constant load, where precision is paramount.Your RoleIn the role of Senior Staff Full Stack Engineer, you will play a critical part in guiding the technical trajectory of our platform, engaging hands-on with both frontend and backend systems. You will tackle the most challenging cross-stack issues—focusing on performance, scalability, correctness, and architectural integrity in a dynamic setting.Architect and develop high-performance systems across the full stack, contributing directly to production code on both frontend and backend levels.Define and refine cross-stack architecture to accommodate user growth, product complexity, and real-time interaction needs.Lead intricate, multi-surface projects from inception to rollout, overseeing system design and implementation.Establish clear boundaries between frontend, backend, and blockchain infrastructure, ensuring systems are modular and scalable.Identify potential systemic bottlenecks (performance, data consistency, infrastructure limitations) and proactively devise robust solutions.Enhance performance, reliability, and observability across the stack.Rapidly prototype and validate innovative product concepts, ensuring successful experiments transition into production-ready systems.Elevate engineering standards through design reviews, architectural guidance, and hands-on mentorship.Serve as a technical anchor during critical launches, migrations, or incidents affecting multiple stack components.Enhance developer efficiency by evolving tools, CI/CD pipelines, testing strategies, and shared abstractions.

Why Join Us?At Brex, we are revolutionizing the way companies manage their spending with our AI-driven spend platform. Our integrated corporate cards, banking solutions, and global payment systems empower businesses of all sizes—from dynamic startups to established enterprises—to gain control over their expenditures, minimize costs, and enhance operational efficiency. Notable companies like DoorDash, Flexport, and Compass trust Brex to optimize their financial processes.Joining Brex means pushing your boundaries, challenging conventional norms, and collaborating with some of the brightest talents in the tech industry. We are dedicated to fostering a diverse team and an inclusive culture where your aspirations can soar. We equip you with the necessary tools, resources, and support to elevate your career to new heights.Engineering at BrexOur engineering teams are focused on creating scalable systems with purpose and precision. We encompass diverse fields such as Software, Data, Security, and IT, working autonomously yet collaborating deeply. We confront tough technical challenges, take ownership of our results, and strive for excellence from design to deployment. Here, engineering is an art form, and builders evolve into leaders.Your RoleAs a Senior Full Stack Software Engineer on our Task Workflows Platform team, you'll be instrumental in developing and scaling the backbone infrastructure that fuels Brex's core experiences. You'll engage with our broad array of platforms, including our multi-channel notifications engine, collaborative commenting system, and dynamic workflow rule builder. Your expertise will be crucial in transforming our task orchestration capabilities from a one-size-fits-all experience to highly customized solutions tailored for specific product domains.Your role involves tackling intricate full-stack challenges, from architecting scalable backend APIs and developing rule-evaluation engines for personalized automations to designing user-friendly frontend experiences for our task interfaces and workflow builders. Beyond platform development, you'll influence the overall product experience, utilizing AI to refine user workflows and contributing to the ongoing advancement of our productivity tools across web and mobile interfaces.Work EnvironmentThis position is based in our New York office, where we embrace a hybrid work model that blends the energy of in-office interactions with the flexibility of remote work. Currently, we require a minimum of three coordinated office days each week, typically Monday through Wednesday.

Senior Full Stack EngineerLocation: New YorkOn-site | Full-timeJoin mlabs, the driving force behind the world's largest memecoin launchpad. Our infrastructure is characterized by ultra-low latency, exceptional throughput, and a continual load, designed for an arena where precision is imperative and the stakes are sky-high.The RoleAs a Senior Full Stack Engineer, you will be pivotal in designing and scaling the future of crypto-social finance. This is not a conventional position; we operate at the forefront of Web3 innovation and seek an individual who excels under pressure.What You'll Do:End-to-End Ownership: Spearheading features from initial ideation to production deployment, exercising substantial autonomy.Full-Stack Architecture: Engaging with the complete stack—from robust backend systems to refined frontend interfaces—ensuring a cohesive and scalable user experience.Rapid Iteration: Quickly prototyping and deploying new features while maintaining system integrity.Complex Problem Solving: Tackling technical challenges unique to high-scale crypto platforms where efficiency reigns supreme.Collaborative Innovation: Partnering with a top-tier team of engineers and designers to push the boundaries of social finance.

About Fairstead Fairstead is a real estate firm focused on affordable housing, with headquarters in New York and offices in Colorado, Florida, and Washington DC. The company manages more than 27,000 apartments across 28 states, integrating development, construction, and property management within one platform. Fairstead’s approach combines thoughtful design, professional management, and responsible operations to deliver affordable housing that benefits residents and communities. Fairstead values technology and data-driven strategies, using digital transformation and emerging technologies, including AI, to build scalable systems for sustainable growth. The company’s culture emphasizes entrepreneurship, innovation, partnership, dedication, and integrity. Role Overview: Senior Full Stack Engineer - IoT The Senior Full Stack Engineer, IoT, will design, develop, and oversee the technology stack for Fairstead’s proprietary IoT platform. This platform connects building sensors to the data infrastructure that informs operational decisions across the company’s portfolio. This position covers the full stack: device firmware, network configuration, message brokering, data normalization, storage, analytics, and user-facing applications. The engineer will serve as the technical lead, architecting a modern, open-standards-based infrastructure that Fairstead will own and operate. The work will start with a live pilot and expand to cover more than 27,000 apartments in 28 states. Beyond IoT projects, this role will help shape Fairstead’s broader digital strategy to ensure technology supports the mission of sustainable, affordable housing. Key Responsibilities Design and develop the end-to-end technology stack for Fairstead’s IoT platform. Oversee all layers, including device firmware, network setup, message brokering, data normalization, storage, analytics, and user interfaces. Lead the architecture of an open-standards-based IoT infrastructure. Manage the rollout from a live pilot to large-scale deployment across the national portfolio. Contribute to Fairstead’s overall digital strategy, ensuring alignment with the company’s mission and goals. Location This role is based in New York, New York, United States.

Join Braze, a leading customer engagement platform, as a Senior Full-Stack Software Engineer. In this role, you will be responsible for developing innovative solutions that enhance user experience and drive business success. Collaborate with cross-functional teams to build scalable web applications and contribute to the overall architecture of our platform.

About Us:ether.fi is a leading player in the cryptocurrency sector, managing over $10 billion in assets with a dedicated team of 30 technical experts. Profitable since our inception, we focus on developing genuine consumer applications.We envision a future of on-chain banking with innovative products like Stake, Liquid, and Cash, allowing users to earn yields through diverse DeFi strategies and utilize their assets in the real world via our credit cards. Explore our public analytics for Cash and Stake.Position Overview:We are seeking a Senior Full Stack Software Engineer to take ownership of feature delivery for our core products. This position is integral to our engineering team, focusing on the complete development of user-facing features, including on-chain portfolio reporting, corporate card functionalities, DApp interfaces, banking transfers, and notification systems. Our roadmap includes everything a neobank would build.Responsibilities:Lead end-to-end feature delivery, working on both backend and frontend components.Collaborate with designers to define the scope and break down technical requirements for new features.Partner with fellow engineers to produce high-quality code and uphold engineering standards.Monitor core business metrics such as user adoption, revenue, and error rates.Qualifications:Solid foundation in software engineering principles and problem-solving skills.Proven track record of successfully launching products with a substantial user base.5+ years of professional coding experience.Motivated, hardworking, and committed to achieving ambitious goals as part of a driven team.Experience in the web3 space is a plus.Benefits:Competitive salary, performance-based bonuses, and token allocation grants.Flexible working hours and opportunities for professional growth.Access to comprehensive health benefits and wellness programs.

Join Lithos Carbon as a Senior Full-Stack Software Engineer and collaborate closely with our Head of Engineering to develop the operating system for one of the largest carbon dioxide removal initiatives in history. Your work will directly contribute to creating an innovative industry aimed at removing tens of billions of tons of CO2 within the next decade.Software plays a crucial role in this endeavor, addressing the mass transfer challenge of carbon removal. We believe that success hinges on effectively leveraging established industries such as agriculture , mining , and transportation . However, having the necessary infrastructure is just the beginning.At Lithos, we are constructing the operating system to plan, orchestrate, track, and optimize enhanced rock weathering. Your deep full-stack technical expertise, combined with empathy and design thinking, will be vital in building and scaling our interconnected platform. Here are some of the diverse challenges you might tackle: Developing interactive geospatial tools for mapping, analysis, and optimization. Creating innovative automated and human-in-the-loop workflows for digitizing PDF maps and records. Designing pipelines for ingesting, converting, and analyzing raw data logs from agricultural machinery. Implementing audit-ready representations, tracking, and reconciliation of various real-world activities. Developing Laboratory Information Management Systems (LIMS) for tens of thousands of field samples.

Role Overview evertune is hiring a Senior Full Stack Software Engineer in New York City. This role focuses on designing and building software solutions that improve user experience. The position involves working closely with teams across the company to deliver reliable, high-quality products. What You Will Do Design and develop software across both front-end and back-end systems Work with cross-functional teams throughout the product lifecycle Take projects from initial concept through to completion Contribute to products that directly impact how users interact with evertune's offerings Key Qualifications Strong experience in both front-end and back-end development Ability to collaborate with engineers, designers, and other stakeholders Track record of delivering high-quality software

About UsSapien is revolutionizing the operational dynamics of finance teams in the AI era. Our vision is to create an autonomous CFO—a comprehensive system managing company financials seamlessly. Our platform provides real-time analytics of intricate financial data, enhancing decision-making speed, mitigating costly errors, and delivering substantial value. We have successfully identified multi-million-dollar discrepancies, preserved thousands of jobs, and significantly boosted our clients' profitability.Partnering with diverse industries—manufacturing, healthcare, dining, and large corporations—we strive to thoroughly grasp and automate their financial workflows. Based in Madison Square Park, NYC, we have garnered support from General Catalyst, Neo, and leading professionals from Google, OpenAI, Microsoft, Ramp, and Stripe, raising over $9M.Position OverviewAs a Full-Stack Engineer, you will develop features from inception to deployment for Sapien's core platform. This encompasses transforming designs into frontend implementations, crafting backend APIs, modifying databases, and integrating agents. You will take ownership of the entire user experience, ensuring functionality and performance.In this role, you will strike a balance between launching innovative features and maintaining platform stability and performance. Engaging directly with clients, you will observe how they utilize your developments and refine them based on genuine feedback.Key ResponsibilitiesDevelop features that position Sapien as an essential tool for finance teams, crafting experiences that engage users daily by proactively delivering insights and addressing potential issues before they escalate.Create intuitive interfaces that simplify complex operations for finance professionals lacking technical expertise.Establish human-in-the-loop systems allowing users to provide feedback, rectify mistakes, and educate the system on specific business processes, enhancing agent intelligence over time.Make pivotal product and technical choices: determine feature functionalities, UI design, database architecture, and appropriate technologies. You will not merely implement specifications; you will conceptualize what to build.QualificationsProficient in modern web technologies such as React, TypeScript, Python, SQL, and common backend frameworks. While you don’t need to be an expert in all areas, you should be capable of navigating the entire stack.A product-oriented mindset, prioritizing user experience in your development approach.