React Developer Jobs

Do work that matters. At AlertMedia, we help organizations protect their people, operations, and brand. Our modern Risk Intelligence and Response platform empowers teams to detect emerging threats, assess impact, and respond with confidence. We believe building resilience should be simpler—and it starts with bringing critical information and workflows together in one unified platform. Our core values drive us in our important mission of keeping people safe & informed: We’re humans not robots Customers always come first We work better together Simplicity is our strength Our reputation is priceless Hard work pays off As one of the fastest-growing software companies in the country, AlertMedia is looking for a Sr. Software Engineer with full-stack experience. This role is on our AI Agent and Orchestration team, building the AI Assistant and Orchestration products and the agents and platform capabilities that power them. As an AI-forward company, we actively use modern AI tools such as Claude, Codex, and other emerging technologies to help our engineers work smarter, move faster, and build better products. Who you are: You thrive in a collaborative engineering environment that plays to everyone's strengths with a willingness to work across the entire stack. You’ve developed scalable production web applications in Python/Django/Next.js/React . You understand how LLM applications work — context, tool calling, evaluation, and the ways they fail. You care about the quality of your work, the impactful product you help build, and the team you help build it with. You have AWS (or other cloud) experience and are willing to learn from people with both more and less experience than you. You are a user of AI-assisted development tools that improve engineering workflows, code quality, and team productivity. What you get to do every day: Build and ship features

Do work that matters. At AlertMedia , we help organizations protect their people, operations, and brand. Our modern Risk Intelligence and Response platform empowers teams to detect emerging threats, assess impact, and respond with confidence. We believe building resilience should be simpler—and it starts with bringing critical information and workflows together in one unified platform. Our core values drive us in our important mission of keeping people safe & informed: We’re humans not robots Customers always come first We work better together Simplicity is our strength Our reputation is priceless Hard work pays off As one of the fastest-growing software companies in the country, AlertMedia is looking for a Sr. Software Engineer with full-stack experience. This role is on our Incident Response team. Customers use Incident Response during an active emergency — to declare an incident, assess who and what is affected, assign tasks, and coordinate the response across the organization. As an AI-forward company, we actively use modern AI tools such as Claude, Codex, and other emerging technologies to help our engineers work smarter, move faster, and build better products. Who you are: You thrive in a collaborative engineering environment that plays to everyone's strengths with a willingness to work across the entire stack. You've developed scalable production web applications in Python/Django/Next.js/React. You design for people operating under pressure, and you think as carefully about the failure paths as the happy path. You care about the quality of your work, the impactful product you help build, and the team you help build it with. You have AWS (or other cloud) experience and are willing to learn from people with both more and less experience than you. You are a user of AI-assisted development tools that improve engineering workflows, code quality, and team productivity. What you

Do work that matters. At AlertMedia, we help organizations protect their people, operations, and brand. Our modern Risk Intelligence and Response platform empowers teams to detect emerging threats, assess impact, and respond with confidence. We believe building resilience should be simpler—and it starts with bringing critical information and workflows together in one unified platform. Our core values drive us in our important mission of keeping people safe & informed: We’re humans not robots Customers always come first We work better together Simplicity is our strength Our reputation is priceless Hard work pays off As one of the fastest-growing software companies in the country, AlertMedia is looking for a Sr. Software Engineer with full-stack experience. This role is on our AI Agent and Orchestration team, building the AI Assistant and Orchestration products and the agents and platform capabilities that power them. As an AI-forward company, we actively use modern AI tools such as Claude, Codex, and other emerging technologies to help our engineers work smarter, move faster, and build better products. Who you are: You thrive in a collaborative engineering environment that plays to everyone's strengths with a willingness to work across the entire stack. You’ve developed scalable production web applications in Python/Django/Next.js/React . You understand how LLM applications work — context, tool calling, evaluation, and the ways they fail. You care about the quality of your work, the impactful product you help build, and the team you help build it with. You have AWS (or other cloud) experience and are willing to learn from people with both more and less experience than you. You are a user of AI-assisted development tools that improve engineering workflows, code quality, and team productivity. What you get to do every day: Build and ship features

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. The Android Systems team bridges the gap between hardware and software to build the foundational platform for Toast POS devices. The team develops the end-to-end software driving our device management product suite—including system applications, cloud-based services, and web user interfaces designed to secure and manage Toast's hardware ecosystem. We are seeking a Staff Software Engineer who is hands-on with coding, is able to design end to end systems, and will pave the path for the team to build modern technical solutions keeping customer empathy in mind. If you are a leader who collaborates well with teams within the organization, can think big, and are passionate about building software systems used to manage hardware devices with high focus on quality, this position is for you! About this roll* (Responsibilities): Hands-on design and implementation of Kotlin backend services to improve our device management workflows for customers. Lead the design and development of the next generation of Toast’s software services and applications to bring a seamless device configuration and user experience for customers. Collaborate with Product Management, Hardware, QA and other Software teams on the product roadmap and requirements to build a long term vision for Toast. Create technical requirements and detailed designs of the software system being developed. Lead effort estimation sessions and use sound judgment to enable planning of projects. Diagnose performance bottlenecks and implement optimizations. Make solid technical decisions keeping software quality, security, and maintainability in mind. Help set the standard for software quality by adopting modern software test frameworks and practices in day to day development. Do you have the right ingredients*? (Requirements): 8+ years of exp

Le titulaire du poste de développeur logiciel intermédiaire travaille en étroite collaboration avec une équipe de développeurs logiciels ainsi qu’avec des fournisseurs tiers afin de créer des applications logicielles de grande qualité dans un environnement Agile. Il doit également se tenir au courant des plus récentes innovations technologiques pertinentes. Anglais de niveau avancé: Cette exigence est requise puisque dans le cadre de cette fonction, vous aurez à intervenir auprès des clients, partenaires et/ou nos filiales internationaux sur une base récurrente tant à l’oral qu’à l’écrit. Dans le présent document, le genre masculin est utilisé dans le seul but d'alléger le texte Faire partie intégrante de l’équipe de développement et contribuer activement au développement d’outils, de services et de plateformes. Collaborer étroitement avec les fournisseurs tiers et agir comme personne-ressource pour le partage des connaissances sur les produits, en assurant la liaison entre Veriforce et les fournisseurs tiers, ainsi qu’en partageant les pratiques exemplaires relatives aux produits et aux outils connexes. Examiner les pratiques et les méthodes de travail de l’équipe et contribuer régulièrement à leur amélioration continue afin d’accroître l’efficacité de l’équipe et d’améliorer la livraison. Lorsque cela est approprié, diriger la mise en œuvre de changements aux pratiques de travail. Collaborer avec d’autres équipes — au sein du service des technologies, dans l’ensemble de l’entreprise et auprès des fournisseurs tiers — afin de déterminer les améliorations pouvant être apportées aux processus et aux services existants, ou de cerner les possibilités de développer de nouveaux services. Travailler en étroite collaboration avec les principales parties prenantes, tant à l’interne qu’à l’externe, afin de recueillir et de documenter les exigences des utilisateurs et de développer des récits utilisateurs. Planifier, rédiger, tester et maintenir le code des applications d’aff

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. As an intern at Affirm, you will be a contributing member of our outstanding engineering team, and as such you will work on meaningful projects and frequently ship code. Recent grads and past interns have built a real-time high-throughput data processing pipeline, developed an extensive automated testing framework, and built out our proprietary financial platform that is central to our long term company mission. We are excited to meet and consider strong students for our 12-16 week internships. We are a dynamic organization that is happy to tailor projects to your skills, and we will work with you throughout the interview process to determine which team will be best for you. What You'll Do Interns are responsible for developing and shipping a project and verifying that it works in production. Because things are changing fast at Affirm, we do not specify intern projects in advance, instead you will collaborate with your mentor and manager when you start to spec a project that will best contribute to your team. This role will ship code and monitor the deployment of your work. Our intern projects are not isolated or intended to be thrown away: your team will depend on your contributions! We pair interns with a dedicated mentor who will be by your side to give advice and ensure the success of your project. Expect to meet with them on a regular basis and receive feedback. There are opportunities to attend events with other interns and full-time Affirmers! Past events have included virtual cooking classes, executive fireside chats, cable car trolley tours, and Giants games. Interns present their work to the entire engineering organization at the end of the internship. What We Look For Passion and dedication to changing consumer banking for the better Experience with Python, C/C++ or Java Frontend

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. As an intern at Affirm, you will be a contributing member of our outstanding engineering team, and as such you will work on meaningful projects and frequently ship code. Recent grads and past interns have built a real-time high-throughput data processing pipeline, developed an extensive automated testing framework, and built out our proprietary financial platform that is central to our long term company mission. We are excited to meet and consider strong students for our 12-16 week internships. We are a dynamic organization that is happy to tailor projects to your skills, and we will work with you throughout the interview process to determine which team will be best for you. What You'll Do I nterns are responsible for developing and shipping a project and verifying that it works in production. Because things are changing fast at Affirm, we do not specify intern projects in advance, instead you will collaborate with your mentor and manager when you start to spec a project that will best contribute to your team This role will ship code and monitor the deployment of your work. Our intern projects are not isolated or intended to be thrown away: your team will depend on your contributions! We pair interns with a dedicated mentor who will be by your side to give advice and ensure the success of your project. Expect to meet with them on a regular basis and receive feedback. There are opportunities to attend events with other interns and full-time Affirmers! Past events have included virtual cooking classes, executive fireside chats, cable car trolley tours, and Giants games. Interns present their work to the entire engineering organization at the end of the internship. What We Look For Passion and dedication to changing consumer banking for the better Experience with Python, C/C++ or

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. About the Team The Professional Services R&D team is a new, dynamic group at the forefront of innovation within Okta. Our mission is to design and build reusable, scalable assets and tools that empower our delivery teams and partners. By making customer engagements more efficient, streamlined, and cost-effective, we directly contribute to our customers' success and accelerate their time-to-value with Okta. This is a unique opportunity to join a strategic team from the ground up and shape the future of Okta's professional services. Position Summary As the Architect for the Professional Services R&D team, you will be the principal technical leader responsible for the high-level design and technical strategy of our entire portfolio of reusable assets. You will define the architectural vision and standards that ensure our solutions are robust, scalable, and secure. This role requires a blend of deep technical expertise, strategic thinking, and strong collaboration skills to guide the engineering team in building a cohesive ecosystem of tools on technologies like Java, React, Node, Python, and .NET. Responsibilities Define and own the end-to-end technical architecture for all reusable assets and solutions developed by the R&D team. Establish architectural standards, patterns, and best practices to guide the development team. Evaluate and select appropriate technologies, frameworks, and platforms to meet project requirements and long-term business goa

At Snowflake, we are powering the era of the agentic enterprise. To usher in this new era, we seek AI-native thinkers across every function who are energized by the opportunity to reinvent how they work. You don’t just use tools; you possess an innate curiosity, treating AI as a high-trust collaborator that is core to how you solve problems and accelerate your impact. We look for low-ego individuals who thrive in dynamic and fast-moving environments and move with an experimental mindset — who rapidly test emerging capabilities to discover simpler, more powerful ways to deliver results. At Snowflake, your role isn't just to execute a function, but to help redefine the future of how work gets done. Snowflake started with a clear vision: develop a cloud data platform that is effective, affordable, and accessible to all data users. Snowflake developed an innovative new product with a built-for-the-cloud architecture that combines the power of data warehousing, the flexibility of big data platforms, and the elasticity of the cloud at a fraction of the cost of traditional solutions. We are now a global, world-class organization with offices in more than a dozen countries and serving many more. Join the Data Engineering Experience (DEX) team and help shape the future of data engineering at Snowflake. We are a mature, highly diverse team dedicated to crafting exceptional data ingestion, pipeline authoring, and observability experiences for our customers. If you're passionate about building elegant web applications and frameworks in a collaborative, supportive environment, then we invite you to be part of our team's success story. AS A SOFTWARE ENGINEER FOR THE DATA ENGINEERING EXPERIENCE TEAM, YOU WILL: Drive high impact initiatives that span our product areas and tech stack including Python, Typescript, Javascript (React), and NodeJS. Promote strong collaboration within a cross functional team and partner closely with embedded product managers and designers. Deliver featur

Notre formule de réussite consiste à embaucher des personnes exceptionnelles, à encourager leurs idées et à récompenser leurs résultats. En tant que stagiaire développeur de logiciel , vous rejoindrez l'une de nos équipes de développement qui soutiennent nos initiatives de développement de réseau ou nos activités de négociation. En fonction de l'équipe que vous rejoindrez, vous construirez des applications avancées de négociation, d'analyse et de risque, ou des systèmes avancés de surveillance et d'automatisation en utilisant une technologie de pointe. DRW permet à nos stagiaires développeurs de logiciels de développer des logiciels à forte intensité de calcul sous la direction de technologues chevronnés, dans le but de les déployer au cours de leur stage. Pendant vos journées, vous serez plongé dans des projets complexes qui contribueront directement au progrès de DRW, mais votre temps sera également rempli d'éducation, de responsabilités, de résolution de problèmes et d'événements sociaux qui vous permettront de découvrir ce que c'est que de travailler chez DRW. Quel impact aurez-vous? Concevoir, développer, tester et déployer des solutions de développement de logiciels propriétaires au sein de l'entreprise. Les exemples incluent la création : D’applications web et de tableaux de bord complets MLOps et ingénierie de pipeline de données De décodeurs qui reçoivent les données brutes par paquets de divers échanges et les traduisent sous une forme plus accessible. De normalisateurs qui prennent les données décodées et construisent un livre pour chaque instrument négocié sur cette bourse. De services et d’outils de surveillance des réseaux RF Identifier des solutions innovantes à des problèmes complexes et plaider pour leur mise en œuvre auprès de votre équipe en communiquant vos idées de manière claire et concise. Mener des recherches solides en utilisant une approche axée sur les données afin d'employer l'analyse statistique sur de grands ensembles de données. Collab

Horizon Trading Solutions ? Une Fintech spécialisée dans la conception d’une plateforme facilitant les différentes activités de trading sur les marchés financiers électroniques (automatisation de certaines activités (Market Making, Algo Trading...), gestion des ordres et exécutions de manière optimale (Agency Trading, Order and Execution Management System…), Un logiciel à la fine pointe de la technologie déployée sur site ou en SaaS, Une roadmap produit ambitieuse : Machine Learning, IA, Crypto Currencies, Low Latency… Une société à taille humaine (160 collaborateurs) où vous pouvez faire une différence, Une société internationale présente dans 6 pays pour servir des clients répartis sur 26 pays, Une société engagée : certifié B-Corp, partenaire de Planet Tech’care, Ethical IA et Lakaa, fond de dotation, Une société reconnue dans son domaine : Best trading solution for listed securities 2022 et 2023, Best trading system strategy development 2022, Best sell-side OMS 2021, Multi-Asset Trading System of the year 2020… Votre quotidien ? Au sein d’une équipe Scrum de 6 à 9 personnes, vous participerez aux étapes de développement de nos solutions (de la spécification jusqu’à la mise en oeuvre chez le client) : Développer et maintenir le code de notre produit en écrivant un code propre, efficace et maintenable qui répond aux normes de développement de logiciels Travailler en étroite collaboration avec les autres membres de l'équipe pour concevoir de nouvelles fonctionnalités et améliorations Apporter votre expertise technique dans le but de proposer, simplifier, et challenger les solutions, Participer aux revues de code et aux tests pour garantir la qualité du code et des fonctionnalités Contribuer à l'amélioration continue de notre processus de développement agile Collaborer avec les autres équipes de la société (en France et à l’international) pour promouvoir les bonnes pratiques. Votre environnement technique ? Une application multi-process de plusi

About Us Small businesses are the backbone of the US economy, comprising almost half of the GDP and the private workforce. Yet, big banks don’t provide the access, assistance and modern tools that owners need to successfully grow their business. We started Novo to challenge the status quo—we’re on a mission to increase the GDP of the modern entrepreneur by creating the go-to banking platform for small businesses (SMBs). Novo is flipping the script of the banking world, and we’re excited to lead the small business banking revolution. At Novo, we’re here to help entrepreneurs, freelancers, startups and SMBs achieve their financial goals by empowering them with an operating system that makes business banking as easy as iOS. We developed modern bank accounts and tools to help to save time and increase cash flow. Our unique product integrations enable easy access to tracking payments, transferring money internationally, managing business transactions and more. We’ve made a big impact in a short amount of time, helping thousands of organizations access powerfully simple business banking. Why Novo? Novo is a rapidly growing series B fintech startup with a mission-driven team that’s passionate about helping every small business in America Positive, inclusive, supportive culture cheering you on your journey We work with very new technologies and architecture patterns Offices in NYC and India. Role Summary: We’re looking for a hands-on Lead Engineer who can own and drive large technical initiatives end to end. This role is ideal for someone who thrives in startup environments, is comfortable working with high autonomy, and can take an idea from a vague business problem all the way to a scalable, production-grade system. You will act as the technical owner for key initiatives—setting direction, making architecture decisions, writing critical code, and ensuring successful delivery without requiring heavy oversight. About the role: Own full-stack initiatives end to end—from prob

MongoDB is building a world-class team in North America to create tooling that helps customers modernize their applications and migrate their data from legacy relational databases to MongoDB in real-time. As companies modernise legacy workloads and data ecosystems, they are increasingly drawn to the flexibility and scalability of the document model. The tools developed by the Code Generation and Data Migration team are critical in this journey, helping customers with schema modeling, code generation, initial data loads, and continuous data synchronization. We're looking for a Software Engineer with a strong background in computer science fundamentals, systems design, experience in the Java ecosystem, streaming systems, and data-intensive applications to join our engineering team. In this role, you will be instrumental in designing, building, and optimizing the underlying data structures, algorithms, and database interactions that power our generative AI platform, code generation and migration tools. This involves crafting sophisticated orchestration layers, robust integration points, and high-performance data systems that seamlessly connect and leverage advanced AI capabilities for code generation and building a sophisticated data migration suite using a modern technology stack, which includes Java, Spring Boot, Kafka, Debezium, and React.You will work on critical components that ensure the scalability, efficiency, and reliability of our services, collaborating closely with AI researchers, product management and other engineers to design and implement cutting-edge products that solve complex customer challenges. This role will be based out of Washington, Oregon, or California. The ideal candidate for this role will have 2+ years of engineering experience in backend systems, distributed systems, or core platform development Experience in one or several of Java, Rust, C/C++, and/or Python, with a strong understanding of systems-level programming, memory ma

CLEAR is building THE secure identity company of the future. Our mission is to make experiences safer and easier—physically and digitally. With more than 43 million Members and a growing network of partners across the world, CLEAR's secure identity platform is transforming the way people live, work, and travel. Whether it’s at the airport, stadium, or throughout your everyday life, CLEAR unlocks the magic of frictionless experiences. We're looking for a Staff Software Engineer to help build the next generation of CLEAR's enterprise identity platform, CLEAR1. We’re creating frictionless identity solutions for some of the most sophisticated companies in the world and pushing the boundaries everywhere we go. As a Staff Engineer, you’ll own high-impact, cross-functional products and integrations end to end from problem framing and architecture through implementation, rollout, adoption, and measurable outcomes. This is an ideal role for someone who thrives in scrappy, ambiguous environments, while bringing the technical rigor and operating discipline developed at larger companies. You’ll partner across teams, establish reusable patterns and standards, improve reliability and execution, influence technical direction, and mentor other engineers. A brief highlight of our tech stack: Python / Java / React / Typescript What you’ll do: Design, build, test, and deploy scalable applications that power CLEAR’s identity platform. Own projects end to end—from technical discovery and architecture through implementation, rollout, adoption, and operational support. Partner closely with Product, Design, Data, Security, and Operations to translate business problems into simple, scalable technical solutions. Design for reality by understanding failure modes, system dependencies, degradation strategies, recovery paths, and the points where systems may break under scale. Build quality and operability into the design from the start, including test strategy, observability, alerting, sa

About the Team We’re hiring a Developer Productivity engineer to support OpenAI’s Inference Runtime teams. These teams own the systems responsible for serving models reliably, efficiently, and safely across Codex, ChatGPT, API, and internal research workloads. We’re hiring a Developer Productivity Engineer to help scale the engineering systems, safeguards, and developer workflows that enable our teams to move quickly without compromising reliability or performance. This role sits at the intersection of developer experience, CI/CD infrastructure, release engineering, production readiness, and inference systems reliability. You’ll work on the tooling and operational foundations that support model launches, inference optimizations, cloud provider integrations, and large-scale deployments across a rapidly evolving inference stack. About the Role We’re looking for an autonomous, high-ownership engineer who cares deeply about making other engineers faster, safer, and more confident. A major focus of this role will be improving the tooling and infrastructure around deploy gates for inference engine images. These systems help ensure that every image released to production and research is correct, numerically sound, free of regressions, and performant across key metrics like time-to-first-token (TTFT) and time-between-tokens (TBT). You’ll help harden the systems that catch issues before they reach production, reduce noise from flaky or infrastructure-related test failures, and improve automation around triage, ownership, debugging, and escalation when failures occur. You’ll also work on improving observability, rollout safety, release automation, and developer self-service tooling across a rapidly evolving inference stack. This is not generic internal tools work. The systems you build directly impact OpenAI’s ability to support new model launches, safely ship inference optimizations to the world, onboard new infrastructure providers, and operate one of the largest and most p