Top Senior Javascript Jobs in Miami, FL

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.

Senior Software Engineer responsible for designing, developing, testing, and releasing scalable full-stack features for Huntress’s Core Platform. The role owns complex projects end to end across frontend, backend, databases, and infrastructure; promotes code quality through testing, reviews, and pairing; breaks down epics into milestones; contributes technical solutions; and mentors engineers. The position requires extensive Ruby on Rails and full-stack experience, plus familiarity with Linux infrastructure, databases, external APIs, Agile practices, and responsible AI-assisted development.

Develop and maintain scalable Java and Spring Boot REST services, APIs, and microservices for mission-critical geospatial systems. Support containerization, orchestration, CI/CD, DevOps automation, testing, infrastructure deployment, data platforms, and third-party integrations. Contribute to architecture, performance optimization, troubleshooting, documentation, stakeholder demos, and Agile delivery. The role requires onsite work in Herndon, Virginia and collaboration on national security missions.

Develop fullstack web applications, enhance platform performance, collaborate on high-impact opportunities, and ensure stable, scalable solutions. Engage in rapid iterations and be a committed team player.

Own quality strategy and test coverage for life insurance underwriting decisioning. Design complex scenarios, validate rules engines and risk classifications, translate underwriting requirements into acceptance criteria, build automated API and data checks, investigate production discrepancies, and serve as the organization’s authority on underwriting correctness.

Lead development of custom Shopify themes and apps, optimize storefront performance and SEO, integrate APIs and third-party services, and collaborate with design, strategy, and engineering teams. The role requires maintaining scalable Shopify solutions, applying responsive design and modern development practices, and staying current with Shopify platform updates. This is a fully remote position with flexible work location and professional development support.

Build and operate scalable, reliable infrastructure using Terraform, Kubernetes, AWS, and CI/CD automation. Responsibilities include managing EKS platforms, improving deployment pipelines, securing networking and IAM, enhancing observability, optimizing cloud costs, implementing disaster recovery, reducing operational toil, and modernizing legacy infrastructure. The role also leads incident response, reliability initiatives, platform adoption, and cross-team infrastructure projects.

Develop and deploy customer-focused web, mobile, and backend applications across the full software stack. Design major features, contribute to architecture decisions, conduct code reviews, and ensure secure, high-quality implementations. Collaborate with stakeholders and cross-functional teams using Agile and SDLC practices. Manage version control, CI/CD, environments, and releases; maintain automated test coverage and perform root-cause analysis. Build and optimize relational data solutions using SQL Server, including complex queries, stored procedures, and performance tuning.

Build and maintain scalable e-commerce and marketplace features across Node.js, React, MySQL, and MongoDB. Own complex features end to end, design backend services and APIs, integrate PunchOut procurement systems, improve platform security and reliability, conduct code reviews, and mentor engineers. The role requires strong full-stack JavaScript and TypeScript expertise, e-commerce domain experience, and the ability to work autonomously on high-volume transactional software.

Lead a globally distributed IT engineering team building enterprise integrations, workflow automation, orchestration, and AI-native workflows. Set technical direction, establish roadmaps, manage delivery metrics, and partner with business and service operations leaders to eliminate manual work. Guide engineers on architecture, CI/CD, testing, and development practices while evaluating emerging automation and AI tools. Build integrations across identity, ITSM, SaaS, and enterprise systems, and grow team capabilities across US and India time zones.

Build and own CRM features and workflow automations supporting sales, marketing, onboarding, and support. Develop full-stack functionality using Next.js, FastAPI, Inngest, and related technologies; partner with teams to automate workflows; create agentic solutions for enrichment and task automation; and manage features from planning through monitoring and refinement. The role requires strong web development expertise, product sense, autonomy, communication, and experience with modern JavaScript or TypeScript frameworks and orchestration tools.

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

Lead enterprise B2B integration projects for strategic customers using APIs, webhooks, connectors, cloud services, and scalable integration architectures. Translate business requirements into technical designs, build and review code, manage complex projects, troubleshoot deployments, and advise customers and internal teams on integration best practices. Collaborate with product, sales, support, and developer ecosystem teams while supporting multiple customer engagements and improving professional services methodologies.

Build and deploy client-facing applications, data pipelines, and AI solutions using Palantir Foundry, Gotham, and AIP. Translate client objectives into delivery roadmaps, prototype rapidly, integrate large datasets, and deliver production-grade decision-support workflows. Lead engineering teams, collaborate with technical and executive stakeholders, communicate requirements and trade-offs, and drive solutions through release. The role requires extensive data engineering, cloud, software development, Palantir, prompt engineering, and client-facing experience, with travel potentially ranging from 0% to 100%.

Build and deploy Palantir-based applications, data pipelines, and AI solutions for client organizations. Translate business objectives into delivery plans, prototype rapidly, integrate structured and unstructured data, and deliver production-grade decision-support workflows. Collaborate with engineers, program managers, domain experts, executives, and client teams while documenting requirements and driving releases. The role requires hands-on Palantir Foundry experience, data engineering, cloud platforms, software development, prompt engineering, and applied AI expertise. Travel may range from 0% to 100% based on client and business needs.

Build and deploy production-grade agentic workflows for enterprise customers using Webflow APIs, CMS, AI capabilities, and external integrations. Design safeguards, observability, rollback paths, and permission boundaries; support live web properties at scale; collaborate with sales and engineering on complex deployments; and convert customer implementation learnings into reusable architecture blueprints and platform improvements.

Leads full-stack software development across Python and FastAPI backend services, TypeScript and React frontend applications, and AWS infrastructure managed with Terraform and GitHub Actions. Responsibilities include architecture, coding, testing, integrations, performance improvements, technical documentation, CI quality gates, code reviews, and Agile delivery. The role mentors engineers, manages development practices, collaborates with cross-functional stakeholders, and directs AI coding agents while maintaining code quality and engineering standards.

Design, develop, deploy, and operate custom web applications across AWS, Azure, and on-premises infrastructure. Build and maintain cloud infrastructure using Terraform and AWS CDK, and help technical users configure and optimize APIs and datasets. Provide technical support and guidance, troubleshoot Linux environments, resolve issues, optimize performance, and maintain reliable custom software solutions.

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.

Leads technical vision and strategy for Affirm’s Marketplace, Search, Ads Platform, and consumer experiences. Designs scalable full-stack platforms, guides architecture and technical excellence, coordinates initiatives across engineering teams, mentors engineers, and drives reliable delivery of customer-focused products across iOS, Android, and Web.

Lead and manage software engineering teams: run agile processes, design and ship secure scalable APIs and services, guide architecture, manage technical debt, recruit and mentor engineers, and align work with company objectives.

Design, build, deploy, and maintain resilient, scalable software for Toast Delivery Services. Develop real-time delivery tracking, driver matching, pricing, refunds, and payment-related systems. Solve distributed-systems and scaling challenges, integrate with partner APIs, uphold production reliability, promote strong engineering practices, and mentor teammates.

Lead engineering for a hyperscale deployment platform serving Microsoft 365 services. Design and deliver scalable deployment features across the full software lifecycle, mentor engineers, and drive automation and AI-powered solutions that improve reliability, efficiency, performance, and operational excellence. Collaborate with product managers and partner teams while ensuring high-quality, maintainable, production-grade software.

Develop and deliver custom, branded websites, integrations, and functionality for Swoogo clients. Responsibilities include front-end development, REST API and webhook integrations, data mapping, testing, debugging, documentation, client advising, technical estimation, project coordination, and training. The role requires translating business requirements into scalable solutions while managing multiple projects and ensuring accessibility, performance, reliability, and pixel-perfect design quality.

Develop and maintain UI test automation frameworks, perform exploratory and accessibility testing, analyze failures, and integrate automated tests into CI/CD pipelines. Collaborate with UX designers and software engineers to improve usability, functionality, and test coverage. Contribute to QA process improvements while applying Agile practices and modern testing tools.