Senior Full-Stack Engineer (.NET) - Remote Opportunity

CentralReach creates software that supports autism and IDD care, including Applied Behavior Analysis (ABA), multidisciplinary therapy, and special education. Over 200,000 therapy providers, educators, and employers use CentralReach to deliver and manage therapy and support services. Role overview The Senior Full Stack Software Engineer (.NET/React) plays a key role in designing, building, and delivering scalable software across the CentralReach platform. This is a remote position for candidates located in the US. The work involves hands-on development with both .NET backend services and React frontends. The role requires taking projects from early design stages through to production release. What you will do Architect, build, and deploy software solutions that support CentralReach’s large user base Develop and maintain backend services using .NET technologies Create dynamic, responsive user interfaces with React Collaborate with product, design, and engineering teams to deliver features that address customer needs Contribute to technical direction and help improve system reliability Own projects from concept through launch Collaboration This position works closely with cross-functional teams, including product managers, designers, and engineers, to shape features and guide technical decisions. Regular collaboration is part of the role.

What You'll Be Doing:Design and implement high-performance, scalable software systems utilizing technologies such as C#, .NET, TypeScript (ES6), React.js, Redux, RxJS, Webpack, and GraphQL.Collaborate with a dynamic team to define, design, and launch innovative features.Oversee system architecture and coding standards efforts while contributing clean, efficient code.Adopt and incorporate modern software engineering best practices and patterns.Provide mentorship and guidance to junior software engineers.Conduct thorough code reviews, ensuring adherence to coding standards, best practices, and security protocols.Diagnose, troubleshoot, and upgrade existing software applications.Stay informed about emerging trends and technologies in software development to enhance product quality and processes.

teamworks is looking for a Senior Full Stack Software Engineer based in the United States. This position centers on building and maintaining applications with Node.js and React. Role overview This engineer will play a key part in designing and developing software that supports a strong user experience. The role involves working closely with colleagues from different disciplines to deliver scalable solutions. What you will do Develop and maintain applications using Node.js and React Work with cross-functional teams to design and implement new features Focus on scalable, high-quality software that improves user interactions Requirements Expertise in Node.js and React Experience building full stack applications Ability to collaborate with a range of technical and non-technical team members

Key ResponsibilitiesServe as a technical leader collaborating with client business, development, and infrastructure teams.Facilitate technical and design discussions with IT executives to accelerate enterprise adoption of innovative technologies and methodologies.Design and develop robust, cloud-native applications leveraging the AWS platform, utilizing essential developer services such as API Gateway, Lambda, SQS, DynamoDB, and ECS.Embrace and implement new technology paradigms, including serverless computing, containers, and microservices.Transition legacy monolithic applications to microservices architectures.Provide guidance on AWS best practices implementation.Shape infrastructure architecture by sharing your development insights.Act as a voice for developers, influencing AWS professional services offerings and product strategy by collaborating with AWS platform engineering, business development, and cross-functional teams.

About SomethingsAt Somethings, we are pioneering the first social wellness platform designed specifically for teens. Our mission is to connect teens with mentors who understand and support them, facilitating meaningful relationships that promote growth and healing.With 25 million teens in the U.S. facing mental health challenges, each download of our app represents a potential lifeline. We strive to ensure that not only do these teens engage with our platform, but they also build connections with caring individuals who can guide them towards a healthier future.Backed by General Catalyst and leading investors in healthcare and consumer markets, we are experiencing rapid growth—having increased our user base by 1100% in 2025 and projecting to multiply our reach fivefold in 2026.If you are eager to contribute to a company that is poised to redefine mental health support for a generation, we invite you to join us.Role OverviewWe are seeking a Full Stack React Native Engineer to become part of our dedicated engineering team. In this role, you will play a vital part in developing the core product experiences that propel our mission forward.Your work will be characterized by high agency and a profound impact:You will actively influence the product features that help teens connect and improve their well-being.What You’ll DoYour responsibilities will extend beyond just building features; you will take complete ownership of critical projects aligned with our strategic objectives for 2026:1. Create Enriching Teen × Mentor ExperiencesDevelop engaging mobile experiences that evoke warmth, speed, and a human touch.Enhance the onboarding process and early engagement to optimize the initial user journey.Design user interfaces that are as intuitive and addictive as leading social applications.2. Develop Scalable Tools for Our Mentor NetworkBuild mentor-focused features that enhance consistency, efficiency, and connectivity.Create safety mechanisms that proactively identify risks and mitigate human error.Refine mentor workflows to ensure they feel empowered by our tools.3. Lead Full-Stack Product DevelopmentConstruct end-to-end features utilizing React Native, backend services, and APIs.Collaborate closely with design, product, growth, and clinical operations teams.Conduct user interviews with teens and mentors to gain deep insights into their needs.

DNSFilter builds products that help customers and partners improve online safety. The company focuses on network security, delivering threat protection and content filtering solutions that are fast, accurate, and reliable. DNSFilter uses AI-powered threat intelligence to help clients address risks before they impact networks. The team values collaboration, innovation, and measurable results, with each member contributing to the mission of securing the internet. As DNSFilter grows, the team is expanding its product features and solutions for a global audience. The company is looking for a Senior Full-Stack Software Engineer with strong experience in React and NextJS to help modernize applications and transition to a new design system. This is a fully remote, full-time role for candidates based in the United States or Canada, with preference for those able to work hybrid from the Westchase, Florida office and during Eastern Time hours. Experience in high-growth SaaS environments is valued. What you will do Work across the full stack, including React, NextJS, MUI, Golang, Ruby, and .NET, as part of the Engineering organization. Collaborate with engineers, UX, and other stakeholders to build modular solutions using the new design system. Deliver meaningful business value to customers through your work. Expand your expertise across the technologies in the DNSFilter ecosystem. Use AI to enhance learning and productivity, and support AI initiatives within the department. Requirements Specialization in React and NextJS development. Proven track record of delivering high-quality code. Ability to work effectively in a fully remote setting. Experience working in a SaaS startup or scale-up environment, ideally in a fast-growing company. Located in the United States or Canada; preference for those able to work hybrid from Westchase, Florida. Available to work full-time during Eastern Time hours. DNSFilter encourages applicants from all backgrounds, recognizing the value of diverse experiences and transferable skills in driving innovation and excellence.

Metrostar Systems is looking for a Senior Full Stack .NET Developer in Washington, DC. This position centers on designing and building software solutions that support client projects and business goals. Role overview As a Senior Full Stack .NET Developer, you will collaborate with colleagues from different disciplines to deliver applications that align with client requirements. The work involves both front-end and back-end development, using .NET technologies as a foundation. What you will do Design, develop, and implement software using .NET frameworks Work with cross-functional teams throughout the project lifecycle Apply modern development practices to create scalable solutions Contribute to cloud-based application development as needed What we value Metrostar emphasizes creativity and technical skill. The team encourages new ideas and high standards in software development. Experience with .NET, cloud services, and up-to-date engineering methods is important for success in this role.

Radiology is the second most utilized healthcare service, accessed by over 51% of the workforce each year. Despite its critical importance, the process for obtaining medical imaging has remained stagnant for decades. OneImaging is revolutionizing the industry with a concierge-style approach and a premium-quality radiology network consisting of over 4,000 vetted providers across 48 states. Our innovative solution not only reduces imaging costs by 60-80% but also ensures patients and families can access essential radiology services at transparent prices without unexpected bills. This leads to immediate savings and ROI for employers and payers on every exam.What You Will Do:Design and develop full stack features using technologies such as TypeScript, React, Next.js, Node.js, Express, MongoDB, and PostgreSQL.Create responsive and accessible frontend interfaces that deliver exceptional user experiences for patients and healthcare providers.Build scalable backend services and RESTful APIs with robust authentication, authorization, and HIPAA-compliant audit logging.Develop reusable React components and uphold consistent design patterns across the application.Implement state management solutions and enhance frontend performance for complex healthcare workflows.Conduct comprehensive testing across the technology stack, including unit, integration, and end-to-end tests.Collaborate with UI/UX designers and product requirements documents to translate designs into production-ready features.Work closely with data engineering teams to incorporate analytics and business intelligence capabilities.Engage in architectural decision-making that impacts both frontend and backend systems.Optimize application performance, troubleshoot issues across the stack, and ensure minimal downtime.Utilize AWS services for deployment, including S3, CloudFront, Route 53, App Runner, and Fargate.Maintain detailed documentation for APIs, component libraries, and architectural decisions.

Join us as a Full Stack Developer at Vitol, where you will play a crucial role in the evolution of our global analytics platform. This platform is powered by the extensive data produced by our in-house end-to-end trading system and various external datasets. As we expand rapidly, we seek outstanding candidates who are passionate about technology and eager to contribute to our mission. In this role, you'll have the unique opportunity to engage with a diverse range of stakeholders, from tank operators to executive leadership, to shape our requirements and deliver a variety of impactful capabilities.As a vital member of our analytics team based in Houston, TX, you will:Work closely with business units to design and implement scalable systems, enjoying a high level of autonomy in our fast-paced environment.Create innovative analytics platforms for our traders, analysts, researchers, and data scientists.Collaborate with business partners to identify needs and develop creative solutions that significantly impact the firm's commercial strategies.Contribute to the creation and maintenance of various internal applications and data streams in partnership with our global team.Transform user feedback into actionable design enhancements and resolve bugs effectively.Write clean, well-documented, tested, and extendable code that meets business requirements.Provide ongoing application support and training to users for day-to-day operations.Engage in diverse projects, including:GIS-based systemsCommodity fundamentals trading tools

Join our dynamic team at upkoi-inc as a remote Senior Full Stack .NET Developer. We are seeking a skilled mid to senior-level developer proficient in C#/.NET to contribute to our innovative projects. Your role will involve the development of top-tier solutions, with a focus on building impactful applications for social good.Initially, you will engage in high-stakes work on a significant project aimed at making a positive difference in the world. Your individual contributions will be crucial to our success.While our long-term vision revolves around artificial general intelligence, direct machine learning expertise is not a requirement for this position, though familiarity is a plus.

Jobgether is looking for a Senior Full-Stack Engineer with strong experience in Python and React. This position is based in the US and centers on building and improving web applications that support our product goals. What you will do Develop, test, and deploy full-stack applications using Python and React Work closely with cross-functional teams to deliver new features and improve existing ones Contribute to architecture discussions and help shape technical decisions Focus on application performance and responsive user experiences Collaboration This role involves regular interaction with team members from different areas, including product and design. Sharing ideas and feedback is encouraged to help enhance our offerings. Requirements Professional experience with both Python and React Ability to write, test, and deploy clean, maintainable code Comfort working in a collaborative environment

Your Impact at Lila Be a part of revolutionizing the scientific landscape! We are on the lookout for a Senior Full Stack Software Engineer to enhance our software platform team. In this role, you will partner with fellow software engineers, laboratory scientists, and machine learning experts to develop innovative tools aimed at streamlining automated scientific analyses. This position encompasses both web services and data engineering, with a robust focus on Python development tailored to scientific applications. If you excel in a collaborative, dynamic environment and apply best practices in version control, development workflows, and user-centered design, we encourage you to reach out! What You'll Be Building Design & Build Services and Front-ends: Create high-performance, secure, and well-documented code that seamlessly integrates with our existing ecosystem of services and applications. Performance & Reliability: Identify and rectify system bottlenecks, ensuring high availability and low-latency performance across extensive workloads. Cloud & Infrastructure: Utilize AWS services, Kubernetes, and contemporary DevOps practices to construct and deploy production-grade systems at scale. Cross-Functional Collaboration: Collaborate with machine learning researchers, engineers, and scientists to weave together data pipelines, APIs, and cloud infrastructure within scientific workflows and services. What You’ll Need to Succeed Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field. 4-8 years of experience in software development within a commercial context. Full Stack Development: Proven experience in developing web applications across the complete stack using React, TypeScript, Monorepos like Nx, TailWind, FastAPI, SQL/NoSQL, Python, and Pydantic. Cloud & DevOps Expertise: Hands-on experience with AWS, GCP, or Azure; deep understanding of Kubernetes, containerization, infrastructure-as-code (Terraform, CloudFormation), and CI/CD pipelines (GitHub Actions). Communication & Collaboration: Excellent listening skills and a record of effective cross-functional teamwork with scientists, data engineers, and product teams; adept at conveying complex concepts to diverse audiences. Problem Solving: Established ability to tackle complex backend challenges, weighing trade-offs between scalability, performance, and maintainability.

Join our dynamic team at StemXpert1 as a Senior Full Stack Developer specializing in .NET technologies. In this pivotal role, you will lead the development of innovative web applications, collaborating closely with cross-functional teams to deliver high-quality software solutions. Your expertise in both front-end and back-end technologies will be essential in driving our projects to success.

About UsIntegrate is a pioneering software company headquartered in Seattle, dedicated to developing innovative program management solutions for cutting-edge technologies, including robotics, autonomous vehicles, and aerospace engineering. We streamline collaboration across organizations within the deep tech sector, allowing teams to work with external partners and stakeholders as effortlessly as they collaborate internally. Our goal is to transform the way businesses interact in the burgeoning deep tech landscape by minimizing communication barriers and reducing workload. Our SolutionCurrent software offerings often fall short of keeping pace with the intricate demands of hardware development in deep tech industries. At Integrate, we are crafting tailored software solutions that enhance clarity, efficiency, and communication among all stakeholders, thereby enabling teams to accelerate their innovation processes. About the RoleWe are in search of a Full Stack Engineer to join our team and contribute to the development and enhancement of Integrate’s product layer. This role encompasses the entire tech stack—from creating user interfaces using React to developing Go APIs and managing the integrations that connect them—positioning you at the heart of our product-user interface.Your initial focus will include developing features for our cross-domain solution workflows, optimizing the presentation of complex project data for users, and aiding in the development of our API and integration services. You will collaborate closely with product managers, designers, and backend engineers to deliver impactful solutions, prioritizing the quality and craftsmanship of your work.As a member of a small team, you will take full ownership of your projects. If you build it, you are responsible for its success.What You'll Work OnCreate and enhance React-based UI components that simplify complex workflow management for users.Design and maintain RESTful APIs and GraphQL interfaces in Go, catering to both internal and external users.Develop and refine data models in PostgreSQL, focusing on schema design, query optimization, and migration strategies.Contribute to our GraphQL integration layer, ensuring that resolvers are efficiently structured and performant.Build and sustain integration services in Go that seamlessly connect internal systems with external APIs, managing everything from interface design to error handling and observability.Implement and manage CI/CD pipelines using GitHub Actions, covering build, test, and deployment processes across various environments.Deliver clean, well-tested, and maintainable code throughout the tech stack, always striving to improve the existing codebase.Tech StackWe utilize React, Golang, GraphQL, REST, PostgreSQL, and GitHub Actions, with Tailwind CSS also being part of our development environment.

OverviewJoin Software Mind as a Full-Stack Engineer specializing in .NET and Angular. We pride ourselves on fostering a collaborative environment that emphasizes high-quality technology solutions. Enjoy a work culture that supports flexibility, continuous learning, and team engagement.Flexible working hours and a genuine work-life balanceAccess to ongoing educational opportunitiesCompany-sponsored social events in your countryPersonalized birthday celebrationsCompetitive payment in US DollarsAbout the Role:We are on the lookout for a seasoned developer to enhance our team. You will lend your technical and design expertise to facilitate platform development. Your insights on technology and product advancement will significantly enhance user experience.

Remote – LATAMAbout UsAccelOne specializes in delivering tailored software development and design solutions for businesses throughout the United States and Latin America. We operate on foundational principles of transparency, effective communication, and accountability, ensuring we provide exceptional, scalable solutions that contribute to our clients' enduring success.About the ProjectOur client is a leading U.S.-based company focused on digital experience personalization, powering real-time, data-driven interactions for top-tier global retail and e-commerce brands. With a robust platform operating across international markets, they utilize advanced analytics and decision engines to enhance customer engagement and optimize performance.Role SummaryWe are on the lookout for a talented Full Stack Engineer with extensive experience in Python, JavaScript, and modern frontend frameworks like React. This role involves hands-on development across both frontend and backend stacks, including APIs, data workflows, and SQL. You will work collaboratively with product managers, designers, and engineers to create high-quality features that enhance our large-scale personalization platform.The ideal candidate will demonstrate clean coding practices, possess strong architectural understanding, and have experience in production environments.⭐ ResponsibilitiesWrite clean, maintainable, and well-tested code using Python, JavaScript, and React.Build and improve backend services, APIs, and data workflows.Create reusable frontend components while ensuring a responsive UI/UX.Convert complex requirements into clear, independent technical tasks.Regularly deploy code to production environments.Collaborate across the SDLC with Product, UX, Support, Professional Services, and Engineering teams.Engage in Agile ceremonies, technical design discussions, and code reviews.Research and integrate modern frameworks, tools, and best practices.Contribute to enhancing performance, scalability, and reliability of the platform.⭐ Required Qualifications5+ years of experience as a Software Engineer in a production environment.Bachelor’s degree in Computer Science or equivalent.Strong proficiency in Python with experience in Linux environments.Frontend experience with JavaScript and frameworks such as React or Angular.Solid SQL skills, with hands-on experience in Snowflake and MySQL.

Join Motion Health as a Senior Full-Stack Software Engineer and be at the forefront of developing innovative web applications and backend systems that enhance both provider and patient experiences. As a key member of our Product Engineering team, you will take ownership of features from their inception to production, and guide the team in making informed technical choices.We seek a product-oriented individual who values both the creation and the method of development. You will collaborate directly with product and clinical stakeholders to refine solutions. Your proven track record of project ownership and comfort with ambiguity will enable you to deliver impactful results.This pivotal role offers the opportunity to significantly influence software development at Motion Health, working alongside product, data, and clinical teams.Your Responsibilities Will Include:Leading the design, implementation, and delivery of features and systems across the technology stack, from React frontends to Kotlin-based services and their supporting infrastructure.Translating product requirements into actionable technical plans while balancing speed, quality, and maintainability.Steering technical decisions at both the project and product levels, contributing to architectural discussions and establishing best practices.Working closely with product and clinical teams to understand user needs and influence development directions.Enhancing our engineering practices, including testing methodologies, deployment pipelines, observability, and incident response.Participating in code reviews and technical discussions, elevating team standards through your contributions.Engaging in on-call rotations to uphold operational excellence.

Vestmark seeks a Senior Full Stack Software Engineer with strong experience in Ruby on Rails and React. This role centers on improving the company’s financial advisor portal, contributing to both backend and frontend development. Role overview As a senior engineer, you will work alongside product managers, designers, and other engineers. The team values collaboration and expects clear communication as part of the daily workflow. The focus is on building applications that are reliable, scalable, and perform well under real-world conditions. Location and work model This position follows a hybrid schedule based in Wakefield, MA or Cambridge, MA. Some in-office presence is required, balanced with remote work flexibility. Key technologies Ruby on Rails React

Join S-PRO, a leading Digital Innovation and Software Engineering firm renowned for delivering exceptional services to rapidly growing enterprises in the Finance, Renewable Energy, and Healthcare sectors. Our expertise spans across advanced technologies such as AI, Blockchain, and Data Science. With a dedicated team of over 200 professionals, we are committed to developing groundbreaking digital solutions that enhance business value and elevate our clients' competitive edge in a constantly evolving digital environment.We are currently looking for a talented Full-Stack Engineer to join our remote team. This position requires a balance of 40% front-end web development using ReactJS and 60% back-end development with Microsoft C#/.NET. As a technical expert, you will play a crucial role in designing, developing, coding, testing, and debugging our next-generation technology platforms.We seek an analytical problem-solver who communicates effectively and can work independently while also collaborating with team members. This is a fantastic opportunity to gain insights into our clients' needs and work alongside seasoned technology professionals—all from the comfort of your home.