Top Senior Javascript Jobs in Miami, FL

Design, build, test, and operate production-grade, secure, and scalable software and services. Partner with customers to translate requirements into technical designs, drive engineering best practices (CI/CD, testing, observability), deliver end-to-end solutions, lead technical workstreams, and apply AI/LLM approaches where appropriate to produce production-ready outcomes.

Lead backend development to scale and harden API infrastructures, implement unit testing playbooks, optimize core algorithms, support migration from Supabase to a robust cloud provider, ensure system reliability and scalability, collaborate with frontend and DevOps, and integrate AI workflows and RPA where applicable.

Own and advance Yahoo’s enterprise Node.js development environment, including runtimes, packages, container images, internal integrations, and CI/CD workflows. Manage runtime lifecycles, security updates, dependencies, releases, testing, automation, and troubleshooting. Support GitHub Enterprise and GitLab Enterprise while integrating AI programming tools to improve developer productivity. Partner across engineering and security teams, and document platform changes, migrations, and deprecations.

Lead DevOps architecture and technical strategy across engineering teams. Design and optimize enterprise CI/CD pipelines, highly available AWS and Azure cloud environments, Kubernetes and Docker platforms, and Infrastructure-as-Code solutions using Terraform and CloudFormation. Improve automation, observability, reliability, security, disaster recovery, and operational excellence while mentoring engineers and partnering with Engineering, Product, Security, and Operations teams across a global SaaS ecosystem.

Lead frontend development across web and mobile experiences, architecting reusable components, design systems, responsive interfaces, and core user flows. Optimize performance, accessibility, rendering, and conversion while integrating REST and real-time APIs. Collaborate with backend, product, and design teams in two-week sprints, contributing to architecture, testing, monitoring, CI/CD, code reviews, and continuous delivery.

Design and build Azure Kubernetes Service features and AI-native infrastructure, improve service reliability and developer velocity, automate incident prevention/remediation, integrate AI tools, and operate distributed, containerized systems at cloud scale.

Lead technical ownership of InfiniBand and GPU interconnect fabric operations for hyperscale AI supercomputers. Drive incident response, deep multi-layer debugging across hardware/firmware/drivers/OS, and define failure models, playbooks, telemetry, and automation to improve reliability, observability, and scalability of GPU clusters and platform SLAs.

Build full-stack AI-powered video creation and collaboration tools, including rich multimedia interfaces, backend APIs, server-side processes, LLM-powered features, and conversational experiences. Work with generative AI, computer vision, and machine learning models in production. Improve system performance, reliability, and code quality while rapidly prototyping and delivering product features in a collaborative, high-ownership environment.

Design and implement PostgreSQL internals and indexing/query features for large-scale document workloads, extend query engine with BSON-aware operators and custom scan nodes, tune index pruning and storage, profile distributed systems for performance, collaborate with open-source DocumentDB/PostgreSQL communities, and participate in design/code reviews.

Develop and maintain .NET applications while migrating authentication from ADFS to Okta. Analyze customer requirements, implement and test software, use DevOps tools to build and deploy applications, and maintain migration, implementation, testing, and user-story documentation. Collaborate with technical teams, project managers, business owners, customers, and users to deliver technically sound projects on schedule and budget. The role is fully remote and supports Department of Justice applications.

Develop, test, deploy, and maintain Microsoft Power Platform solutions for federal mission-critical systems. Build Canvas Apps, Model-Driven Apps, Power Pages, Dataverse models, and Power Automate workflows. Migrate legacy .NET, C#, and JavaScript applications, support integrations and testing, troubleshoot defects, document solutions, and assist with production operations. Collaborate within Agile/Scrum teams while meeting federal security, privacy, and Section 508 accessibility requirements.

Lead customer implementations of healthcare data platform solutions by configuring the Smile platform, scripting, troubleshooting, designing technical solutions, and providing architectural guidance. Collaborate with customers and internal teams to deliver scalable, secure solutions, support technical analysts, contribute to RFPs, manage concurrent projects, and participate in on-call support.

The Senior Test Engineer designs and executes manual and automated testing for front-end applications, back-end data, reporting, ETL processes, APIs, and workflows. Responsibilities include creating test plans and cases, performing functional, regression, performance, and non-functional testing, automating tests, documenting defects, conducting root-cause analysis, supporting UAT, and collaborating with Agile/SAFe teams and stakeholders. The role also provides requirements analysis, test estimates, defect reporting, and customer support for a CMS case management system.

Serve as a customer-facing education domain advisor supporting Salesforce sales opportunities with higher education institutions. Partner with account executives and solution engineers, lead discovery workshops and architecture presentations, design business and technical architectures, contribute to RFPs, assess risks, and deliver educational content. Advise executive stakeholders on cloud transformation, Salesforce capabilities, Agentforce, integrations, security, and enterprise architecture while meeting performance objectives. The role includes approximately 25% travel.

Design, build, ship, and own high-scale, user-facing product features across frontend, backend, and data systems. Define problems, scope and prioritize work, collaborate with Product, monitor production usage, debug incidents, improve reliability, review code, and mentor engineers. The role requires strong backend expertise alongside React proficiency and ownership from product discovery through long-term maintenance.

Design and implement scalable first-mile networking solutions for Microsoft 365 Substrate and COSMIC. Drive design, dependency identification, coding, optimization, debugging, and on-call monitoring. Analyze production telemetry to improve reliability, performance, and observability. Act as a DRI, lead design and release plans, and collaborate with stakeholders to meet product requirements at global scale.

Designs, develops, and maintains automated test frameworks and suites for complex API and web applications. Tests software functionality, performance, scalability, and database integrations; debugs defects and verifies fixes. Collaborates with engineering, QA, product, and cross-functional teams on test strategy, code reviews, sprint planning, and root-cause analysis. Contributes to CI/CD automation and creates test plans, cases, procedures, and reports.

Leads software design, development, debugging, testing, deployment, and production support for web applications. Conducts code reviews, builds reusable code, improves legacy systems, monitors system health, optimizes performance, and responds to on-call incidents. Collaborates with engineering, product, design, customers, and vendors; mentors junior engineers; maintains development standards; and champions API-first development. Requires full-stack experience, cloud-native application deployment, database expertise, REST APIs, testing, and AI-assisted development workflows.

Develop and maintain high-scale JavaScript and TypeScript monetization solutions using Prebid.js, Prebid Server, and Google Ad Manager. Own the header bidding wrapper, integrate auction and ad-tech standards, optimize Core Web Vitals and client-side performance, operate Google Cloud services, review code, document architecture, and resolve production issues.

Lead frontend development for a satellite-data monitoring application serving defense and intelligence customers. Design and implement React and TypeScript features, guide frontend architecture, contribute to backend APIs, mentor engineers through reviews and technical discussions, and collaborate with product managers and designers. Own feature delivery from discovery through deployment while improving state management, data fetching, component design, testing, and frontend best practices.

Design, develop, and maintain automated testing solutions for customer-facing applications and web services. Build test frameworks, integrate tests into CI/CD pipelines, and improve coverage, reliability, security, and release quality. Develop front-end and web-service automation using Groovy/Geb and Java/HttpClient, troubleshoot application issues, participate in code and test reviews, and collaborate with Agile development teams throughout the software lifecycle.

Design and operate large-scale, AI-native cloud infrastructure (especially Kubernetes/AKS). Improve service quality, automate incident prevention/remediation, accelerate engineering productivity, and integrate AI tools into development workflows.

Design, develop, test, deploy, and support enterprise Microsoft Power Platform solutions using Power Apps, Power Automate, Power BI, and Dataverse. Integrate solutions with Microsoft 365, SharePoint, Azure services, Azure SQL, and external data sources. Gather requirements, document solutions, perform testing, troubleshoot issues, and provide technical leadership on governance and the Power Platform Center of Excellence. Mentor developers and support ongoing platform enhancements.

Build core digital banking experiences for bank administrators and customers by developing streamlined user flows, robust APIs, and third-party integrations. Write clean, documented, tested code with strong error handling, logging, and performance. Design scalable systems using domain-driven design and microservices, contribute to architectural decisions, and provide technical guidance and code reviews in an Agile Scrum environment.

Designs and implements enterprise AWS solutions for contact centers, primarily using Amazon Connect and Salesforce Service Cloud Voice. Responsibilities include developing integrations, configuring cloud services, advising on technical requirements, leading development teams, conducting code reviews, troubleshooting, documenting solutions, and training users. The role requires programming proficiency, AWS architecture knowledge, infrastructure automation, CI/CD experience, and the ability to lead technical delivery with minimal direction.