Senior Full Stack Software Engineer

Join Point72 as a Technology Intern in 2026, specializing in UI/UX Engineering with a Full Stack focus. This internship is an exciting opportunity for aspiring engineers to work on innovative projects, collaborate with seasoned professionals, and gain hands-on experience in a vibrant tech environment.As a UI/UX Engineer intern, you will be involved in designing user-friendly interfaces and developing seamless user experiences. Your contribution will be pivotal in enhancing our technology solutions and supporting our mission to deliver exceptional investment insights.

Join Treehouse Strategy as a UI/UX Design Intern, where you will play a crucial role in shaping the user experience of our digital products. In this dynamic position, you will:Design and develop user interface mockups and prototypes that effectively convey the functionality and aesthetics of our websites.Craft original graphic designs including images, sketches, and tables to enhance user engagement.Present initial drafts to internal teams and key stakeholders to gather feedback and refine designs.Collaborate with product managers and engineers to understand and evaluate user requirements.Visualize design concepts through storyboards, process flows, and sitemaps.Create graphic user interface elements such as menus, tabs, and widgets to ensure intuitive navigation.Develop navigation buttons and search functionalities to enhance user interaction.Identify and resolve UX issues, focusing on responsiveness and usability.Implement layout adjustments based on user feedback to improve user satisfaction.Establish style standards for fonts, colors, and images to maintain design consistency.This unpaid internship offers a flexible, remote work environment. Please include your availability and a link to your portfolio in your cover letter.

About Northslope TechnologiesAt Northslope Technologies, we are redefining the landscape of enterprise software by creating mission-specific AI applications tailored to our customers' unique needs. Our innovative solutions empower businesses across various industries to operate with the speed, scale, and efficiency of leading software companies.We are on a mission to develop software that adapts seamlessly to the evolving demands of our clients, driven by a team of engineers who excel in both technical prowess and customer-centric design. The RoleAs a Full-Stack Software Engineer at Northslope, you will be at the forefront of designing, developing, and scaling high-impact applications that span the entire technology stack—from front-end to back-end. Collaborating closely with internal teams and stakeholders, you will transform complex datasets into critical workflows, tools, and actionable insights.Your responsibilities will include crafting user-focused interfaces, developing robust APIs, and managing data pipelines. You will take ownership of projects from inception to deployment, ensuring rapid delivery while playing a vital role in enhancing the operations of teams tackling intricate real-world challenges.At Northslope, we value engineers who are not only adept at writing clean code but also possess a keen understanding of product design and implementation, ensuring that solutions are not only effective but also impactful. What We're Looking ForUser-Centric Focus – You are dedicated to ensuring user success, often stepping beyond your immediate role to deliver solutions that generate real business value.Full-Stack Development Expertise – You are versatile in navigating both front-end and back-end technologies. You have hands-on experience with modern software and AI applications, as well as RESTful APIs, to deliver cohesive user experiences.Frontend Proficiency – Your expertise in TypeScript and React is complemented by a track record of developing modern, responsive web applications. You understand component architecture, state management, and performance optimization, with a passion for creating intuitive and accessible user interfaces.Ownership Attitude – You flourish in environments where you are entrusted with autonomy and responsibility, taking initiative to lead projects while valuing team collaboration.Production Experience – You have a solid history of building and maintaining applications in production settings, demonstrating your capability to deliver results.

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.

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.

Join Uncountable Engineering as a Full-Stack Software Engineering Intern!About the RoleAt Uncountable, we are on a mission to transform industrial research and development. We are seeking enthusiastic interns who are eager to dive into the world of full-stack software engineering. You'll collaborate with a talented team to develop a cutting-edge platform utilized by Fortune 500 companies, contributing to innovative projects that will shape the future of the industry.Exciting ProjectsAs a part of our team, you will engage in projects such as designing databases for advanced analysis and creating user-friendly interfaces for scientists to effectively manage their experiments.EligibilityWe encourage applications from students who are graduating within a year of the internship.CompensationInterns will receive a competitive salary of $6,000 per month.

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.

About Us At Propel, we are dedicated to creating innovative technologies that enhance the social safety net. With a dynamic team of around 100 passionate individuals, we envision a future where every American can access the resources they need to thrive. The Role Are you an experienced Senior Full Stack Engineer eager to contribute to building groundbreaking products at a purpose-driven organization? Do you excel at crafting consumer-friendly experiences and flourish in a startup environment with high autonomy? We are seeking a driven Senior Full Stack Engineer to join our team at Propel. In this pivotal role, you will be instrumental in developing new Medicare and Medicaid products from the ground up. You will engage in end-to-end development across both frontend and backend systems, creating user experiences that empower individuals to understand coverage options, identify savings opportunities, and enroll in healthcare plans. Your collaboration with product and design teams will be key as you help shape the technical architecture, internal tools, and scalable integrations with healthcare and government systems. AEP Schedule Note: Please note that this position experiences an increase in workload from September to early December during the Medicare Annual Enrollment Period (AEP). During this time, flexibility in work schedules may be limited, and there will be a heightened urgency to support launches and maintain system reliability. Outside of AEP, our team enjoys significantly more flexibility. What We Offer: A collaborative, humble, and motivated engineering culture Opportunities for knowledge sharing through project demos, Lunch & Learn sessions, and comprehensive documentation A people-centered management approach that values engineers’ input, supports career advancement, and offers avenues for technical growth Meaningful work with a strong shared mission A remote-first working environment, with our headquarters in Brooklyn. We provide a monthly co-working stipend for employees outside NYC. We are accepting applications from states with established entities, including California, Colorado, District of Columbia, Florida, Georgia, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Texas, Virginia, and Washington. 20 days of Paid Time Off (PTO) 4% 401(k) match $10,000 lifetime benefit towards Carrot Fertility Excellent medical, dental, and vision insurance options Fair and competitive salaries; we believe in equitable compensation for all our employees.

Join CGS Federal as a Senior UI/UX Designer II and play a pivotal role in transforming user experiences for a major Federal agency.As a key member of our Information Technology department, you will lead innovative design initiatives that significantly contribute to government projects. At CGS, we pride ourselves on our collaborative environment where skilled and creative professionals unite to tackle pressing challenges using advanced technology.Your contributions will help shape the future of government services, and we are looking for individuals who thrive in a dynamic setting and are passionate about user-centered design.

Join CGS Federal as a Senior UI/UX Designer and immerse yourself in a rewarding career where your creativity and expertise will drive innovation for a major Federal agency. This full-time role demands an experienced professional capable of leading comprehensive UX design projects.At CGS, we pride ourselves on uniting motivated, skilled, and innovative individuals to tackle the most pressing challenges faced by government entities through advanced technology solutions. We are dedicated to fostering an environment that supports our team members, encourages collaborative efforts, and promotes continuous professional development through various learning avenues.As a Senior UI/UX Designer, you will:- Spearhead extensive UX design initiatives, including user research, system evaluation, and blueprinting.- Oversee the planning, design, and implementation of multiple websites and applications across various clients in a fast-paced environment.- Conduct all stages of user research and analysis to create intuitive, user-friendly web pages and application interfaces.- Collaborate with engineers and federal clients to design and implement innovative, aesthetically pleasing, and user-centric solutions tailored for federal customers and their stakeholders.- Develop wireframes, storyboards, and site maps to clearly communicate interaction and design concepts for digital platforms.- Create scalable design assets to facilitate project collaboration and enhance ECS creative services.

Join Our Team at TennrAt Tennr, we revolutionize the referral process in healthcare. When a patient is referred to a specialist, the journey can often be fraught with delays and confusion. We bridge this gap by ensuring every referral reaches the right specialist with the necessary information promptly, empowering healthcare providers to enhance their efficiency and service delivery.Your RoleWe are seeking a dynamic Full Stack Product Engineer who thrives on transforming innovative ideas into practical solutions that address real customer challenges. You will be responsible for designing and implementing features that span frontend and backend systems, thereby delivering substantial value to our clients. This includes creating database schemas, developing backend APIs, and designing user-friendly interfaces that healthcare professionals adore.In collaboration with product and design teams, you will gain insights into user interactions with our platform and translate these into strategic product enhancements. Additionally, you'll partner with sales and customer success teams to integrate valuable customer feedback into our product offerings. You will engage with cutting-edge artificial intelligence techniques, positioning yourself at the forefront of technological advancements in the healthcare space.Ideal candidates will possess a founder’s mindset, excel in fast-paced, ambiguous environments, and take ownership of the entire lifecycle of features—from ideation through implementation to continuous improvement. You will spearhead performance optimization initiatives, ensuring code quality, scalability, and adherence to best practices as we expand.This position is ideal for a versatile engineer eager to work across the software stack and passionate about creating impactful user experiences that shape the future of healthcare.

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!

Category-defining tech. Career-defining work.In an industry where many tech companies struggle to scale, Cockroach Labs sets itself apart. Our flagship product, CockroachDB, empowers innovative enterprises to build and scale applications effortlessly. We confront challenges head-on, focusing on solutions that yield lasting impact.Because when our customers succeed, we all thrive.At Cockroach Labs, we embrace a hybrid work model. Team members located near our offices are encouraged to collaborate in person on Mondays, Tuesdays, and Thursdays, while enjoying flexible work options for the remainder of the week. Our remote experiences have taught us invaluable lessons, but nothing can replicate the creativity, connection, and enjoyment that arises from in-person collaboration.The RoleWe are seeking exceptional Backend Engineering Interns to join our dynamic team. During your internship, you will:Design, develop, and test the backend of our distributed open-source database, CockroachDB.Be paired with a team that aligns with your interests, working on a project relevant to your focus area that will be showcased across our Engineering organization.Collaborate closely with engineers and product managers to drive impactful solutions.

The Role Join Hex Technologies as a talented Software Engineer within our dynamic Growth & Monetization team. This team works on various initiatives, including product-led growth (PLG), user activation, pricing models, billing systems, and innovative product developments. Your contributions will empower a diverse clientele ranging from emerging startups to established Fortune 500 companies, enabling them to maximize the value they derive from Hex. This position is perfect for an engineer who operates with a business mindset and possesses a strong product intuition. Your responsibilities will extend beyond coding; you will focus on optimizing conversion rates, enhancing user experience, aligning business objectives, and transforming user interest into indispensable engagement. Collaborate with Product, Design, Data, and Marketing teams to drive significant business outcomes for Hex. Our PLG strategy is central to Hex’s growth trajectory. Each day, countless data scientists and analysts discover and explore Hex. As a vital part of our team, you’ll play a crucial role in converting that initial interest into long-term engagement and revenue through experimentation, product enhancements, and a steadfast commitment to driving business performance. If you aspire to integrate the precision of engineering with the impact of business leadership, then this is the opportunity for you. This full-time position offers the flexibility of working from our New York, NY or San Francisco, CA locations, or remotely from anywhere within the United States.

About Us:At Zealthy, we strive to democratize high-quality healthcare, ensuring accessibility for all, regardless of location. We are developing the largest and most trustworthy virtual healthcare platform globally, revolutionizing care delivery to guarantee that everyone can access the healthcare they need.Founded by an accomplished healthcare entrepreneur who successfully scaled a previous venture to a $5 billion valuation, Zealthy is poised for sustainable growth as we aggressively pursue our ambitious vision. Our steadfast dedication to quality and accessibility is at the core of everything we do.Our team is united in serving our patients. Our in-person work culture operates Monday to Friday, often extending beyond standard hours, but the true reward is the impact we are creating. Each team member plays a crucial role in crafting something innovative. As a full-time employee, you will not only help shape the future of healthcare but also share in our success through equity ownership, as we believe every contributor should be both a literal and figurative owner of our creation.If you are not ready to fully commit to your role and contribute to our mission of building the world’s largest and highest quality telemedicine company by working in-person four days a week, we kindly ask that you refrain from applying.Join us in redefining the future of healthcare.The Role:We are on the lookout for a passionate UI/UX Designer (Product Designer). Please note that this is a full-time, in-person position based in New York, NY. If you are seeking remote or hybrid opportunities, this role may not be a fit for you.What You'll Do: Execute comprehensive UX and UI designs in partnership with our Founder, who is the product lead. Collaborate with engineering teams to implement designs and participate in quality assurance to ensure designs function effectively in staging and production. Develop advertising concepts and analyze their performance, allowing you to iterate and create even more impactful ads. Design email communications and assist in guiding the company as we establish our brand and visual identity. Work alongside marketing to create designs in Webflow and Unbounce for landing pages and overall website design. Requirements: Minimum of 1 year of product design experience; familiarity with graphic design and video production is a plus. Robust work ethic and a proactive attitude. Proficiency in Figma. Combination of creativity and the ability to evaluate trade-offs between quality and speed in implementation. Collaborative approach. Self-motivated with the ability to work with minimal supervision. A desire to be part of a dynamic startup with significant growth potential.

Are you a passionate UX/UI Designer looking to make a significant impact? Join Mindlance, a dynamic company at the forefront of innovation, where you will have the opportunity to create user-centric designs that enhance user experiences across various platforms.

Are you a creative and innovative UX/UI Designer looking to make an impact? Join our dynamic team at Artech Information Systems LLC where you will have the opportunity to design engaging user experiences and interfaces that delight our clients. Your role will involve collaborating with cross-functional teams to create intuitive designs and enhance user satisfaction.

Join System Canada Technologies as a UX/UI Developer specializing in the financial sector. We are looking for a creative and detail-oriented developer who is passionate about designing user-centered experiences. In this role, you will collaborate with cross-functional teams to create intuitive user interfaces and seamless user experiences that meet the needs of our clients in the financial industry.Your contributions will directly impact the effectiveness of our products, making them more accessible and user-friendly. If you are ready to take your development skills to the next level and make a significant impact in the finance space, apply today!

Loop builds software to streamline payments and data transparency for shippers, carriers, and brokers. The company focuses on removing inefficiencies from logistics payments, where manual processes and limited data insight often lead to financial losses. By combining artificial intelligence with industry expertise, Loop delivers automated audits, faster payment cycles, and practical insights for shippers and third-party logistics providers. Clients have reported significant improvements, including lower expenses and more efficient back-office operations. Loop’s team approaches supply chain problems with a customer-first mindset and a drive for creative solutions. Investors include Founders Fund, 8VC, Susa Ventures, Flexport, and several prominent angels. Team members bring experience from leading tech and logistics companies such as Uber, Google, Meta, Flexport, Samsara, Intuit, Rakuten, and CH Robinson. Role overview The Full-Stack Software Engineer partners with founders and clients to address complex logistics billing and payment challenges. This position helps shape product features that directly impact user experience. The role offers opportunities to solve difficult technical problems, receive mentorship, and play a part in building both the product and company culture. What you will do Collaborate with product, design, and sales teams to gather requirements and deliver thoughtful solutions Write maintainable, high-quality code across the stack Participate in code reviews and uphold strong engineering standards Lead and document technical discussions to determine the best designs Develop features spanning front-end, back-end, and infrastructure components Promote best practices and share technical knowledge with teammates Contribute feedback on products, processes, and company culture as Loop grows Location This position is based in New York, NY, USA.

Company Overview: At Momenti, we believe in transforming the way people interact with content. Our immersive video technologies provide interactive experiences that evoke emotions and strengthen connections. Join us in revolutionizing content consumption, where every moment is lively and engaging.Key Responsibilities: Create intuitive user interfaces for mobile applications through wireframes, mock-ups, and prototypes.Develop comprehensive user experience strategies, conducting user research, usability testing, and mapping out user journeys.Collaborate closely with product and engineering teams to align with product objectives.Design visually appealing elements that are in line with the latest trends in the industry.Establish effective navigation structures and information architectures for enhanced user experience.Continuously explore and stay updated on emerging mobile trends and technologies.