Top Senior Javascript Jobs in Miami, FL

Design and implement C++ features for MongoDB’s replication infrastructure, improving availability, recovery, consistency, performance, and fault tolerance. Diagnose distributed-systems issues, develop comprehensive tests, collaborate across engineering teams, participate in design and code reviews, and mentor junior engineers. The role involves owning technical work from investigation through delivery and contributing to major MongoDB releases.

Develop and maintain MongoDB server workload resilience infrastructure in C++ or Rust. Design workload policies for rate limiting, prioritization, overload mitigation, availability, and performance. Write unit and integration tests, investigate failures, improve observability, diagnose and fix complex distributed-system issues, and lead technical projects. Collaborate across engineering teams, mentor junior engineers, participate in hiring, and improve operational readiness, monitoring, incident management, and rollout processes.

Leads software quality engineering across digital banking products by designing scalable automated tests, expanding frameworks, integrating testing into CI/CD, analyzing defects, and closing testing gaps. Partners with engineering and product teams on quality strategy, reviews automation code, mentors SDETs and QA professionals, leads testing teams, supports bug triage, and establishes consistent testing standards across multiple product areas.

Build testing tools, frameworks, metrics, and standards for Cedar’s engineering teams. Improve test-suite reliability, speed, coverage, service-to-service testing, and CI/CD integration. Establish testing best practices, connect tests to product behavior, and lead quality-improvement projects from investigation through adoption. The role requires strong software development and testing expertise in Python and JavaScript/TypeScript, with experience using modern testing frameworks and measuring test performance and reliability.

Develop and operate CrowdStrike’s internal cloud management platform and mission-critical CI/CD pipelines. Build APIs and UIs using Go and TypeScript, improve developer productivity, integrate tooling, maintain cloud-native infrastructure, and support secure, highly available software delivery systems. Collaborate with development, infrastructure, security, and SRE teams, ensure SOC2-aware processes, and participate in on-call operations.

Build and maintain authentication and fine-grained authorization systems using Auth0 and OpenFGA. Own OAuth 2.0 and OpenID Connect implementations, identity federation, token flows, and permissions for AI agents. Lead cross-team technical projects, set engineering standards, review code, and mentor engineers. The role requires strong backend development skills and experience with identity providers, ReBAC systems, and complex multi-tenant authorization models.

Build and operate reliable, scalable infrastructure using Terraform, Kubernetes, AWS, and CI/CD automation. Own cloud networking, IAM, secrets, observability, disaster recovery, cost optimization, and platform resilience. Improve deployment practices, eliminate manual toil, lead incident response and postmortems, modernize legacy infrastructure, and partner with engineering teams to deliver secure, reproducible systems. The role is remote with travel to Orlando at least twice annually.

Lead enterprise automation and agentic AI initiatives, owning the automation and integration stack and Center of Excellence. Build secure, reusable workflows and integration frameworks using platforms such as Zapier, Claude, and Glean. Establish governance, standards, documentation, and prioritization practices while partnering with IT, innovation teams, engineers, business stakeholders, and executives. Identify operational inefficiencies, develop automation roadmaps, and deliver scalable systems with secure data handling, access controls, human oversight, and measurable business impact.

Lead technical vision and strategy for Affirm’s Cards backend engineering organization. Architect scalable and reliable platforms, guide cross-team initiatives, champion AI adoption and engineering excellence, influence technical roadmaps, and mentor engineers through Staff level. The role requires strong architectural expertise, organizational leadership, project management, communication, and cross-functional collaboration.

Own complex software systems and critical workflows end-to-end while ensuring reliability, performance, security, and maintainability. Lead architectural decisions, mentor engineers, manage incident response, improve system health, and communicate effectively with technical and non-technical stakeholders. The role requires extensive Ruby on Rails, AWS or equivalent cloud infrastructure, Linux production operations, frontend development, relational databases, testing, CI/CD, and observability experience.

Build backend-focused Java/Kotlin APIs and data-driven product features, while contributing to React dashboards and workflows. Design scalable systems, participate in architecture and code reviews, troubleshoot production issues using observability tools, and collaborate with data, reporting, design, and product teams to launch emerging products.

Assess and modernize the architecture of an FDA-regulated SaaS product. Define target-state architecture using DDD and clean architecture, address technical debt, optimize data storage and integrations, and create a phased refactoring roadmap. Provide hands-on technical leadership to a mixed-technology team, improve CI/CD and development processes, establish engineering standards, and mentor engineers through design reviews and documentation.

Leads the design, development, and implementation of production-grade web applications and biomedical data platforms. Builds Node.js and React applications, APIs, server-side components, and scalable cloud-based solutions. Provides technical leadership, mentors junior engineers, coordinates cross-site projects, manages release schedules, prioritizes features, collaborates with scientists and product teams, performs testing and code reviews, and maintains technical documentation and deployment guidance.

Own and maintain a business-critical WordPress website, including security, performance, hosting, deployments, accessibility, and technical SEO. Develop responsive landing pages, templates, themes, and reusable components. Integrate WordPress with HubSpot, Salesforce, analytics, and marketing platforms while ensuring reliable lead capture and tracking. Manage testing, releases, documentation, and agency handover, and collaborate with Marketing Operations, IT, and external agencies to deliver website enhancements supporting campaigns and business growth.

Designs, builds, and operates scalable video streaming infrastructure for live and on-demand services. Responsibilities include transcoding, packaging, CDN optimization, SSAI, DRM, service mesh, Kubernetes, cloud infrastructure, infrastructure as code, serverless technologies, automation, high availability, scalability, and disaster recovery. The role requires deep expertise in streaming protocols, media workflows, cloud platforms, DevOps, and distributed systems, plus a Certified Widevine Implementation Partner certification.

Lead a team of software engineers building and scaling Spark’s broker productivity platform. Responsibilities include architecting full-stack solutions, guiding technical direction, reviewing code, managing infrastructure priorities, coordinating product planning, sequencing projects, coaching engineers, hiring, and ensuring reliable, high-quality delivery. The role balances hands-on engineering with people management and is fully remote within the United States.

Develop scalable test automation frameworks, QA tools, and intelligent testing systems using Playwright, C#, and JavaScript/TypeScript. Integrate automated testing into CI/CD pipelines, build end-to-end, integration, and performance solutions, and apply AI techniques to improve test generation and defect detection. Partner with engineering and QA teams, troubleshoot reliability issues, contribute to test strategy, and mentor colleagues on automation and modern testing practices.

Leads performance engineering across the organization by designing load-testing and data-generation frameworks, defining benchmarks and standards, analyzing application, database, and system behavior, and guiding teams in performance optimization. Builds reusable tooling and best practices using k6, JavaScript, Grafana, and InfluxDB while addressing scalability, latency, throughput, and reliability challenges in distributed cloud-native systems.

Leads end-to-end Salesforce solution design, development, configuration, integration, deployment, and operational support. Serves as a technical subject matter expert, translating business requirements into scalable, secure applications. Responsibilities include coding, architecture alignment, data and performance management, technical reviews, automation, release management, stakeholder consultation, risk remediation, mentoring, and continuous improvement.

Leads end-to-end technical solution design and delivery for complex enterprise projects, including System Design Specifications, Salesforce development, configuration, integrations, testing, and support. Serves as a subject matter expert, advises project teams and business stakeholders, coaches colleagues, and may oversee coding, data modeling, requirements, prototyping, training, and implementation of Salesforce solutions.

Develop and ship full-stack, AI-powered applications using Unframe’s platform. Collaborate with product teams and enterprise customers to tailor solutions, extend platform and UI layers, integrate AI capabilities into production, and deliver clean, tested, maintainable code. The role requires end-to-end ownership of user-facing products and strong communication in a fast-moving startup environment.

Develop and modernize county permitting applications by migrating legacy systems to .NET and Oracle platforms. Build C# MVC applications, JavaScript interfaces, Oracle database solutions, SSIS ETL packages, SSRS reports, and secure REST/SOAP integrations. Implement workflow automation, online submissions, invoicing, payments, and ECM integration while maintaining data integrity and regulatory compliance. Collaborate with county analysts, business users, vendors, and cross-functional teams in a hybrid Miami-area environment.

Design, develop, and enhance custom SAP Fiori/UI5 applications; configure Fiori Launchpad; integrate OData services; perform UI debugging, performance optimization, code reviews, unit testing, and documentation while collaborating with backend and functional teams.

Lead and architect scalable web systems, mentor frontend and backend developers, define coding standards and roadmaps, drive implementations using React/Next/Node/NestJS, produce technical documentation, conduct code reviews, and collaborate with product and DevOps to deliver secure, maintainable solutions.

Develop and document enterprise-grade SaaS platform functionality while improving quality and performance. Responsibilities include full-stack development, functional and unit testing, defect triage, code reviews, API and process documentation, operational support in regulated environments, and collaboration within Agile and DevOps teams. The role requires expertise in C#, ASP.NET Core, T-SQL, Entity Framework Core, web technologies, software design, debugging, distributed architectures, and high-performance APIs.