Senior Full Stack Developer - Cryptography

MaintainX builds a mobile-first workflow management platform for industrial and frontline teams. Our IoT-enabled, cloud-based product supports maintenance, safety, and operations across equipment and facilities. Over 13,000 organizations, including Duracell, Shell, McDonald's, Cintas, and others, use MaintainX to streamline work execution in manufacturing. Following a recent $150 million Series D, our total funding stands at $254 million, with a company valuation of $2.5 billion. Role Overview MaintainX is hiring Senior and above Full-Stack Developers for the Connected Data team. This group focuses on integrating clients' operational data into MaintainX, building advanced integrations, managing sensors, and developing APIs. The team handles data ingestion, normalization, and presentation, supporting automation and asset intelligence features. Key systems include: Connectors (Ignition, Kepware, MQTT/Sparkplug B) On-Premise Agent Automation and Alerting engine Connected Data operates in squads and works closely with major enterprise clients to digitize equipment data. What You Will Do Improve our integrations platform: Design, build, and maintain connectors and data pipelines to import customer data from industrial systems such as Ignition, Kepware, MQTT brokers, OPC UA servers, SCADA, and historians. Build IoT and sensor experiences: Develop backend systems for ingesting, transforming, and storing high-volume sensor telemetry. Create frontend interfaces for monitoring device health, managing fleets, and ensuring data accuracy. Support real-time data services: Help ensure the reliability, performance, and observability of the team's core services that process real-time data at scale. Locations Positions available in Montréal, Toronto, Vancouver, San Francisco, and New York.

SentiLink is at the forefront of revolutionizing identity verification and risk solutions, enabling organizations and individuals to conduct transactions with utmost confidence. Our mission is to redefine the identity verification landscape in the United States by delivering solutions that outpace traditional methods in speed, intelligence, and accuracy.With significant growth momentum, SentiLink's real-time APIs have successfully validated hundreds of millions of identities, initially within financial services and rapidly branching into diverse sectors. We are proudly supported by esteemed investors such as Craft Ventures, Andreessen Horowitz, NYCA, and Max Levchin.Our innovative approach has garnered accolades from industry leaders and media outlets, including TechCrunch, CNBC, Bloomberg, Forbes, and Business Insider. Notably, we have consistently secured a spot on the Forbes Fintech 50 list since 2023. We also made history by being the first company to launch the eCBSV and by presenting our insights to the United States House of Representatives regarding the future of identity.SentiLink embraces various work arrangements, from fully remote to on-site options. As a digital-first organization, we foster robust collaboration across teams in the U.S. and India, with physical offices located in Austin, San Francisco, New York City, Seattle, Los Angeles, and Chicago in the U.S., along with Gurugram and Bengaluru in India. For those near our offices, we encourage regular in-office engagement, although some roles are intentionally hybrid or office-based, exemplified by our engineering team in India who primarily operates from our Gurugram office.

About StackAIStackAI is a revolutionary no-code AI workflow platform that enables businesses to construct, implement, and expand AI-driven workflows without requiring extensive machine learning expertise. With a growing user base and increasing enterprise adoption, our goal is to democratize access to large language models (LLMs), empowering every business operator—beyond just developers. Supported by Y Combinator and top-tier investors, we are laying the groundwork for the AI-driven future of work.The RoleAs a Senior Full Stack Engineer, you will be instrumental in defining the product and technical architecture at StackAI. Your responsibilities will span the entire technology stack, from crafting scalable backend systems to creating stunning and user-friendly frontend interfaces, and incorporating advanced AI models into our platform. This role offers significant impact, as you will work closely with the founding team, take charge of essential product features, and shape the engineering culture of a rapidly evolving startup.We seek exceptional 10X engineers—innovative builders who can consistently deliver results in a dynamic environment, remain inquisitive, and excel in diverse roles.ResponsibilitiesIn this role, you will:Build and own the entire platform, from backend services and APIs to frontend interfaces.Create robust, scalable backend systems utilizing Python and FastAPI (or similar), with optimized databases (SQL/NoSQL).Design and maintain high-quality user interfaces using React, Next.js, TypeScript, and Tailwind CSS, ensuring polished, intuitive, and responsive user experiences.Integrate new AI models and features into our products for seamless performance and enhanced value.Manage StackAI’s landing and product pages to establish benchmarks for clarity, design, and quality.Collaborate across the stack to connect backend services with frontend applications seamlessly.Engage with design, product, and customers to refine product direction and prioritize user needs.Stay at the forefront of full-stack technologies, promoting best practices and innovative solutions.Assist with customer support as needed; every team member contributes to user satisfaction.

Join our dynamic team at 360IT Professionals as a Senior Full Stack Developer. We are seeking a talented individual who thrives in a collaborative environment and is passionate about building scalable web applications. You will be responsible for both frontend and backend development, ensuring the seamless integration of technologies to deliver optimal user experiences.

About the RoleAs a Full-Stack Developer at Flowith, you will play a pivotal role in integrating front-end and back-end development to create powerful, scalable, and user-friendly AI-powered products. Your contributions will significantly influence how users engage with sophisticated AI functionalities, turning complex algorithms into seamless features. Collaborating with designers, product managers, and fellow engineers, you will help deliver exceptional experiences that breathe life into our AI offerings.Key Responsibilities:End-to-End Product Development: Take charge of the full-stack development of Flowith's core modules, ensuring the delivery of highly available and scalable system code, either independently or as part of a team.AI Engine Integration: Integrate advanced AI algorithms and models into the product workflow, simplifying technical complexities to craft stunning, interactive experiences.Cross-Functional Collaboration: Engage closely with product managers, designers, and AI engineers in a dynamic environment to transform visionary AI concepts into reality.Cloud Deployment & Performance Optimization: Automate deployments and manage continuous integration on leading cloud platforms, continuously monitoring and enhancing system performance and resource utilization.Upholding Engineering Standards: Participate in the ongoing evolution of core architecture and conduct thorough code reviews, consistently adopting best practices to elevate the overall engineering excellence of the team.

Overview:Join the innovative Data Acquisition team at OpenAI, where we drive the future of AI through advanced data collection techniques. Our mission is to support model training operations by managing web crawling and the GPTBot services. Collaborating with Data Processing, Architecture, and Scaling teams, we are on the lookout for a talented Full-Stack Engineer to enhance our data infrastructure. In this role, you will create and optimize the tools and interfaces that are crucial for our data operations.Responsibilities:Design, develop, and maintain full-stack applications tailored for data acquisition, including internal tools and comprehensive dashboards.Work collaboratively with cross-functional teams, such as Data Processing, Architecture, and Scaling, to facilitate efficient data ingestion and workflow management.Craft and implement APIs that streamline data interactions between internal systems and external data sources.Enhance user experience by creating intuitive web-based interfaces for effective management and monitoring of data pipelines.Optimize backend services focusing on performance, scalability, and security within a distributed computing framework.Collaborate with legal and compliance teams to ensure our data acquisition practices meet privacy regulations and adhere to industry best practices.Deploy and maintain infrastructure leveraging Kubernetes and Infrastructure-as-Code (IaC) methodologies.Analyze system performance, conduct thorough experiments, and refine data workflows to drive operational efficiency.Qualifications:Bachelor's, Master's, or PhD in Computer Science or a related discipline.4+ years of professional experience in full-stack development.Expertise in frontend frameworks (e.g., React, Vue) as well as backend technologies like Python, Node.js, or Go.Strong command of RESTful APIs, GraphQL, and database design (both SQL and NoSQL).Experience in developing data-intensive applications capable of managing large-scale datasets.Familiarity with cloud platforms (AWS, GCP, Azure) and container orchestration technologies (Kubernetes, Docker).Previous experience in web crawling and large-scale data processing is advantageous.Exceptional problem-solving abilities and adeptness at juggling multiple tasks in a dynamic environment.Outstanding communication and collaboration skills.

About Pax HistoriaPax Historia is an innovative alternate-history sandbox game that allows players to select a country and a pivotal moment in time, enabling them to rewrite history. Imagine a world where Rome never fell, the Soviet Union thrived, or Genghis Khan reigned longer.Supported by Y Combinator, Pace Capital, and Z Fellows, our game has amassed nearly 20 million rounds played and is experiencing rapid growth. Your contributions will impact a product enjoyed by hundreds of thousands of players.Our CultureMany of our players discover Pax Historia through word-of-mouth, YouTube reviews, and other organic channels, and they return because of our commitment to building an exceptional game. We want every team member to share this passion. History enthusiasts are particularly welcome, but we encourage anyone who can articulate their excitement about our game to apply.As a small company, you will collaborate closely with the cofounders and a select group of employees. We seek self-motivated individuals who are team players and ready to champion their ideas. The leadership style here values autonomy, allowing you to thrive without micromanagement.Flexibility is crucial in our fast-paced environment. As we scale, be prepared to address various challenges that arise.Your RoleWe are looking for a full-time web developer to join us on-site in San Francisco (Dogpatch). You will report directly to the cofounders. This role is intensive, with an expected commitment of 50-60 hours per week initially, transitioning to potentially fewer hours as you settle in. While we prefer candidates who can commit to in-person work, there may be slight flexibility for hybrid arrangements (e.g., 1 day per week remote). Your schedule will have some flexibility.As a web developer, you will play a key role in enhancing the customer experience on paxhistoria.co.Given our small team size, you will also be expected to assist with various ad-hoc projects as they arise. This is a dynamic, evolving role!

Join our dynamic team at 360itprofessionals as a Full Stack Developer, where you will be instrumental in designing and implementing innovative solutions. Your expertise in both front-end and back-end development will help us create robust applications that enhance user experience and drive business objectives.

Join our dynamic team at 360IT Professionals as a Full Stack Developer. We are seeking a passionate individual who thrives in a collaborative environment and is eager to take on complex challenges. If you are proficient in both front-end and back-end technologies, and are looking for a stimulating role in San Francisco, we want to hear from you!

About AbridgeAbridge, founded in 2018, is dedicated to enhancing understanding in the healthcare sector. Our innovative AI-driven platform is specifically designed for medical conversations, streamlining clinical documentation processes while allowing healthcare professionals to concentrate on what truly matters—their patients.Our state-of-the-art technology converts patient-clinician dialogues into structured clinical notes in real-time, integrating seamlessly with electronic medical records (EMRs). With our unique Linked Evidence framework and auditable AI, we are the only organization that aligns AI-generated summaries with factual data, enabling providers to swiftly trust and verify outcomes. As trailblazers in the realm of generative AI for healthcare, we are setting benchmarks for the ethical application of AI across healthcare systems.Our expanding team consists of practicing MDs, AI experts, PhDs, creatives, technologists, and engineers, all collaborating to empower individuals and make healthcare more comprehensible. We have offices in the vibrant Mission District of San Francisco, the trendy SoHo area of New York City, and East Liberty in Pittsburgh.The RoleWe are seeking dynamic Senior Integrations Engineers to join our rapidly growing team! This pivotal role will support our expansion during this hyper-growth phase. You will be instrumental in designing, developing, and scaling integrations that drive our product capabilities. Collaborating with fellow engineers, implementation specialists, support staff, and product managers, you will create both real-time and batch data integrations with our partners and clients.What You’ll DoDesign, build, and maintain robust integrations and infrastructure to scale our business.Develop secure, high-quality healthcare integrations utilizing REST-like APIs, FHIR standards, and third-party APIs.Work closely with our health system customers to implement, troubleshoot, and support integrations, engaging confidently with external partners and stakeholders.Enhance existing systems with new features, improving performance, stability, quality, and security.Promote high coding standards, improve codebase quality of life, contribute to documentation, and help manage technical debt.Foster user empathy and maintain a user-centric approach in all development efforts.Communicate effectively within and on behalf of our cross-functional product delivery teams, collaborating across various disciplines.

Join Us in Building a Safer World.At TRM Labs, we harness the power of blockchain analytics and AI technologies to empower law enforcement, national security agencies, financial institutions, and cryptocurrency enterprises in the fight against crypto-related fraud and financial crime. Our advanced platforms provide critical insights to trace fund origins, identify suspicious activities, and construct comprehensive threat landscapes. Trusted by leading organizations globally, TRM is committed to fostering a safer, more secure world for everyone.We invite you to become a part of our Knowledge Layer team, dedicated to extracting, structuring, and analyzing vast amounts of unstructured data. This pivotal team focuses on knowledge graphs, entity resolution, graph extraction, and graph analytics, supporting the development of TRM’s core intelligence offerings.We seek a passionate Senior Full Stack Data Scientist to amplify our machine learning and data science capabilities. You will bring practical ML expertise—particularly in knowledge extraction and graph-based ML—to the table, enabling us to innovate and scale our solutions effectively. This role is perfect for someone who thrives in end-to-end operations, from model selection and experimentation to rolling out ML systems and APIs.Your Impact:Design, develop, and implement machine learning models aimed at:Knowledge extraction from unstructured data (e.g., Named Entity Recognition, entity linking)Graph-based learning and inferenceEntity resolution and relationship discoveryAnalyze existing ML models and frameworks to address real-world challenges efficientlyCollaborate closely with backend and graph engineers to integrate ML models into production services and APIsContribute to the design and enhancement of knowledge graphs and ontologiesConduct exploratory data analysis (EDA) to guide modeling decisions and system architectureManage ML components end-to-end, including experimentation, evaluation, deployment, and iterative improvementHelp establish best practices for applied ML within the Knowledge Layer teamDesired Qualifications:Proven experience in machine learning and data science, particularly with knowledge extraction and graph-based methodsStrong programming skills in languages such as Python or RFamiliarity with ML frameworks and libraries (e.g., TensorFlow, PyTorch)Effective communication skills to collaborate with technical and non-technical stakeholders

Join our dynamic team at Elite Solutions as we expand our AI-driven initiatives! We are in search of talented developers, engineers, and researchers who are eager to shape the future of artificial intelligence systems.Whether your expertise lies in creating user-friendly interfaces, developing robust back-end systems, training advanced AI models, or designing scalable infrastructure, we have a place for you!If you're unsure where your skills best fit, don't worry—we'll provide guidance. Explore the roles below and let us know which aligns with your interests and abilities.1. Front-End DeveloperResponsible for designing and implementing engaging user-facing applications and dashboards. Key Skills: React, JavaScript/TypeScript, TailwindCSS, Figma, UX principles.2. Back-End DeveloperTasked with building APIs and server-side systems that drive AI tools and data pipelines. Key Skills: Python, FastAPI, Go, SQL/NoSQL, REST/GraphQL.3. Full-Stack EngineerDevelops complete applications that link front-end interfaces with back-end AI logic. Key Skills: Combination of Front-End and Back-End skills, API design, CI/CD.4. Machine Learning EngineerResponsible for deploying, fine-tuning, and maintaining AI models in production. Key Skills: PyTorch/TensorFlow, MLOps, model serving, inference optimization.5. Data EngineerBuilds scalable data pipelines and manages datasets essential for training and evaluation. Key Skills: Apache Airflow, Spark, SQL, Python, BigQuery, ETL systems.6. Research EngineerBridges the gap between AI theory and practical application by developing prototypes. Key Skills: Python, ML libraries, LLM experimentation, rapid prototyping.7. DevOps / Site Reliability Engineer (SRE)Ensures the reliability, monitoring, and automation of AI systems. Key Skills: Kubernetes, Docker, Prometheus, CI/CD, Python/Bash.8. Infrastructure EngineerDesigns and maintains the cloud infrastructure that supports AI training and deployment. Key Skills: AWS/GCP, Terraform, distributed systems, cost optimization.9. Security EngineerResponsible for securing the platforms and services that support our AI stack. Key Skills: Cloud security, identity management, penetration testing, audits.10. AI Researcher (LLM / CV / RL)Conducts experiments to advance the science behind our models, including LLMs, computer vision, and reinforcement learning. Key Skills: Research publications, advanced ML theory, model development, experimentation.

About UsAt Roboflow, our mission is to revolutionize how we perceive and interact with the world through programmable vision. As pioneers in artificial intelligence, we provide developers with the tools and resources to create and implement computer vision models effortlessly.With over 1 million developers, including teams from half of the Fortune 100, leveraging Roboflow's open-source and hosted tools, we are at the forefront of innovation. Our applications range from accelerating cancer research by counting cells to enhancing safety on construction sites, and much more.Supported by esteemed investors such as Y Combinator, Google Ventures, and Craft Ventures, we have raised over $63 million to continue our mission.Our team, 'Roboflowers,' embodies a culture of curiosity, accountability, and a proactive approach to technology. We prioritize hands-on experience and collaboration, thriving in a high-autonomy environment where every team member acts like a founder.

Join our dynamic team at 360IT Professionals as a Full Stack Developer. This contract-to-hire position offers you the opportunity to work with cutting-edge technologies, including Python and Django. We are looking for talented developers who are eager to contribute to innovative projects and collaborate in a fast-paced environment.

We are seeking a talented and experienced Senior Software Engineer with a focus on Java-based web technologies to contribute to our innovative Healthcare software solutions. The ideal candidate will possess extensive full stack experience, working with Google Web Toolkit (GWT) for front-end data visualizations and advanced SQL for driving user interface functionalities.

Join our dynamic team at gumloop as a Senior Full Stack Engineer, where you will play a pivotal role in shaping our technology landscape.Take ownership of end-to-end feature development: design, implement, test, deploy, and maintain your creations in production.Collaborate closely with users to swiftly transform feedback into actionable improvements, achieving results within hours, not days.Develop and manage scalable front-end and back-end solutions that maintain speed and reliability as user traffic increases.Contribute to the growth of the team by reviewing pull requests, providing context, and mentoring junior engineers.

At CreatorIQ, we are dedicated to revolutionizing creator-led growth, empowering over 1,300 global brands and agencies to thrive.Our mission is to humanize businesses while amplifying the impact of individuals. Guided by our core values—intentionality, excellence, collective journey, and humanity—we have been recognized as one of the best workplaces by various programs, including BuiltIn LA and NY. Our growth story includes being named one of the Fastest-Growing Companies in North America by Deloitte Technology Fast 500™ for four consecutive years, and being highlighted as a leader in IDC MarketScape: Worldwide Influencer Marketing Platforms for Large Enterprises in 2025, among others. Our flexible work model fosters collaboration and innovation, accommodating diverse working styles.Join us in our exciting journey. Become a vital part of our dynamic team and help transform the industry!Senior Full Stack Engineer, Creator RecruitWe are looking for a talented Senior Full Stack Engineer to enhance our Creator Tools team. Your contributions will significantly improve user experiences and help us develop scalable solutions for our expanding platform.The ideal candidate will possess a strong background in frontend frameworks, solid backend development skills, and a collaborative spirit suited for a fast-paced environment. You should be ready to take ownership of features, contribute to architectural decisions, and maintain high coding standards.The Creator Tools team is responsible for developing all user-facing features on our platform, directly impacting the lives and livelihoods of creators who utilize our tools to earn and sustain their businesses.From payment processing and social authentication to e-commerce solutions and campaign workflows, we enable the full creator experience. Every feature you develop and enhancement you implement is integral to delivering a seamless, intuitive platform that empowers creators to grow and earn with confidence.This role allows you to make an immediate and meaningful difference in the lives of creators who rely on our platform to pursue their passions.

Join DEUNA as a Full Stack Tech LeadAt DEUNA, we are at the forefront of transforming global commerce with our innovative AI-powered platform, ATHIA. Our technology empowers large enterprises to enhance approval rates, minimize costs, and discover new revenue streams. Backed by the creators of the fastest-growing Commerce OS in Latin America, we have integrated over 300 payment service providers and alternative payment methods, processing more than 20% of Mexico’s digital economy.As we expand into the U.S. market, we are looking for a passionate and experienced Full Stack Tech Lead to join our dynamic technology team. This essential role involves driving integrations with platforms like Shopify and Magento, developing payment connectors, and ensuring the delivery of robust web applications. You will work closely with designers, software engineers, and stakeholders to create end-to-end solutions that set new standards in payment processing.Key Responsibilities:Technical Leadership:Guide a full stack development team in delivering impactful solutions through Agile methodologies, fostering a culture of teamwork and innovation.Application Development:Design and develop state-of-the-art web and mobile applications, focusing on performance and user engagement.Feature Implementation:Lead the design and integration of new features and enhancements across applications.Integration Management:Manage the integration of various services and APIs, ensuring seamless operation across platforms.Maintenance and Optimization:Enhance existing applications through troubleshooting and performance optimization.Project Planning and Execution:Collaborate on project planning and execution to ensure timely delivery while maintaining code quality.Research and Innovation:Stay current with industry trends and emerging technologies to drive innovation.

Join Windfall as a Full Stack Software Engineer, where you will play a crucial role in developing and maintaining our innovative technology solutions from the ground up. Our definition of 'full stack' encompasses everything from connecting services and creating APIs to building user interfaces across diverse products. You'll thrive in a dynamic, collaborative environment, working alongside senior leadership who are eager to share their extensive technical, product, and business expertise to propel your career forward.As part of our Application Team, you will be instrumental in bringing cutting-edge, AI-driven features to our customer-facing applications, as well as developing complex tools that enhance the efficiency of our internal teams, including Customer Success, Business Development, and Engineering.At Windfall, we are committed to transforming how organizations understand and utilize people data. Our core values guide us: (1) Communicate effectively; (2) Embrace transparency; (3) Deliver leverage, not just optimization; (4) Make impactful changes every day; and (5) Uphold integrity and trust.