Top Senior Javascript Jobs in Miami, FL

Develops and sustains enterprise software applications using MuleSoft Anypoint Platform and low-code/no-code technologies. Translates business and system requirements into application designs, specifications, integrations, and code. Collaborates with business analysts, systems architects, and designers to implement third-party applications and APIs. Supports testing, documentation, reporting, and lifecycle management. The role requires experience with BPMN-based automation, agile development, Microsoft technologies, APIs, and MuleSoft development.

Lead QA strategy and scalable test automation for cybersecurity web applications using Playwright and JavaScript. Build and maintain reliable automated testing frameworks, integrate tests into CI/CD pipelines, establish quality gates, diagnose failures, and support security testing. Mentor junior engineers, conduct code reviews, collaborate cross-functionally, and improve testing practices, coverage, reliability, and release quality across multiple products.

Develop and debug production-grade full-stack applications across front-end and back-end systems. Build features, APIs, databases, and data models; troubleshoot end-to-end issues; analyze unfamiliar codebases; translate implementations across programming languages; and review AI-generated and developer-written code for correctness, security, scalability, performance, and maintainability.

Build and maintain software engineering infrastructure for AI development and evaluation workflows. Develop rubrics, review and label preference data, create scalable pipelines, document findings, navigate complex codebases, and improve evaluation quality and consistency. Collaborate with researchers and engineers in an ambiguous, fast-paced environment while applying strong judgment, debugging, communication, and system-design skills.

Provides technical leadership for Azure SQL databases supporting a highly available Azure service. Responsibilities include database performance tuning, reliability and capacity planning, schema changes, data migrations, observability, incident response, root cause analysis, operational automation, and technical strategy. The role partners with software engineers, SREs, and architects to improve scalability, durability, cost efficiency, and long-term service reliability across teams.

Lead architecture and roadmap for Azure PostgreSQL systems; design and review scalable, maintainable database engine features (query processing, storage, transaction logging, recovery, versioning, IO, scale-out). Influence coding standards and run code reviews, write proof-of-concept or production code, contribute to open-source PostgreSQL/Linux, and participate in rotational on-call operations.

Leads design and delivery of Plan Intelligence, an analytics platform using React, TypeScript, Python FastAPI, PostgreSQL, and AWS. Owns features end to end, mentors engineers, architects scalable solutions, collaborates with data engineering, builds mapping and analytics experiences, integrates LLM features, improves performance, and supports development through production environments. Responsibilities include testing, documentation, code reviews, security, integrations, monitoring, and establishing engineering practices.

Build, architect, and own moderate-to-complex backend components; lead small teams or projects; provide technical guidance and code reviews; deliver end-to-end backend services focused on AI-enabled customer data insights, onboarding, messaging/calling features, and scalable data management for a growing user base.

Lead development of AI infrastructure for large-scale GPU training and inference. Design workload scheduling, serving, orchestration, resource governance, failover, and multitenant Kubernetes platforms. Build reliable C# and Go services, optimize GPU fleet performance, and drive observability, diagnostics, and production operations. Provide technical leadership, architectural direction, mentoring, and cross-team collaboration across cloud infrastructure, hardware, networking, and AI deployment teams.

Builds and maintains custom software applications using .NET, Java, and JavaScript technologies. Responsibilities include software design, coding, debugging, testing, troubleshooting, and developing web-based and client-server systems. The role handles complex technical projects autonomously, may provide technical consultation and team leadership, and requires strong collaboration and communication skills. Travel up to 15% is expected.

Builds and maintains custom software applications, performing design, coding, debugging, testing, troubleshooting, and technical consultation. Works autonomously on advanced projects, may lead work groups, and follows coding standards and technical designs. The role supports web-based and client-server systems and requires strong collaboration and communication. Up to 15% travel is expected.

Leads a forward-deployed engineering team delivering customer integrations, data migrations, technical implementations, and escalations. Owns customer relationships from kickoff through go-live, designs integrations with GIS, CMMS, and inspection platforms, builds ETL and validation tooling, and manages team capacity, development, and performance. Partners with Sales, Solutions Engineering, Product, and Engineering to improve technical feasibility, scope work, and turn recurring custom implementations into reusable products and processes.

Design, build, and optimize responsive, high-performance front-end interfaces for a Web3 DEX using modern JavaScript frameworks and TypeScript. Collaborate with designers, product, and back-end teams to integrate blockchain APIs and smart contracts, mentor junior developers, troubleshoot issues, and contribute to mobile-first/PWA development while ensuring scalability and maintainability.

Designs, deploys, and maintains secure, scalable AWS infrastructure using Terraform and GitLab CI/CD. Supports applications and managed-service users, monitors environments, troubleshoots incidents, manages IAM, and improves reliability through automation, observability, backups, upgrades, and disaster recovery practices. The role also documents environments, supports audits, collaborates with engineering and security teams, and participates in on-call operations.

Own end-to-end technical delivery for strategic enterprise customers by designing and building production AI applications, integrations, workflow automations, and enterprise system connections. Write production code, configure the platform, manage authentication and security constraints, lead testing and go-live hypercare, troubleshoot integrations, and serve as the senior technical client contact. Partner with Product, Engineering, Post-Sales, and clients while developing reusable integration patterns and delivery documentation.

Build AI-powered tools, scalable services, APIs, automations, and community experiences for Brilliant Black Minds. Lead projects independently from design through release, integrate LLM capabilities, and manage community operations including Discord moderation, member engagement, and study groups. Serve as the program’s sole engineer while translating community needs into reliable technical solutions.

Build and ship full-stack product features using Python, Django, PostgreSQL, JavaScript, and Vue.js. Scale Kubernetes and AWS infrastructure, develop Selenium-based test and workflow automation, integrate APIs and CI/CD pipelines, and improve monitoring and observability. Collaborate with customers, clinical stakeholders, and internal teams to analyze workflows and deliver production-ready solutions in healthcare technology environments.

Owns end-to-end test strategy, designs scalable backend and UI automation frameworks, integrates automated testing into CI/CD pipelines, performs exploratory testing, and advocates for testability and reliability across engineering and product. The role requires strong programming, Kubernetes and distributed-systems knowledge, debugging ability, and cross-functional ownership in a fast-moving startup.

Own end-to-end verification and validation for complex cloud-native software systems. Design comprehensive testing strategies, build scalable backend and frontend automation frameworks, identify coverage gaps, perform root cause analysis, integrate tests into CI/CD pipelines, and improve testing efficiency. Apply AI-assisted tools to testing and debugging, evaluate emerging AI capabilities, mentor engineers, and raise quality standards across teams.

Evaluates AI coding-agent interactions for technical quality, engineering judgment, reasoning, explanations, and user trust. Provides detailed written and recorded feedback, distinguishes response quality levels, and helps define standards for tools such as Codex, Claude Code, and Cursor. This remote contract requires strong TypeScript, JavaScript, or Python experience, familiarity with AI-assisted development workflows, and senior-level engineering judgment.

Evaluate AI coding agents such as Codex, Claude Code, and Cursor for engineering judgment, response quality, reasoning, explanations, and usefulness. Provide clear written and recorded feedback, distinguish quality levels, and help define standards for excellent AI-assisted development interactions. This contract role requires senior-level software engineering experience, strong Python or TypeScript/JavaScript skills, familiarity with modern AI development workflows, and excellent English communication.

Evaluate AI coding-agent interactions for correctness, usefulness, engineering judgment, explanation quality, and user trust. Provide clear, opinionated written feedback, distinguish response-quality levels, and help define standards for tools such as OpenAI Codex, Claude Code, and Cursor. The role requires senior-level software engineering experience, strong TypeScript/JavaScript or Python skills, hands-on AI-assisted development experience, excellent English communication, and the ability to assess code without executing or reviewing every line.

Develop and optimize enterprise Drupal platforms, including multisite deployments, custom modules, workflows, content architectures, integrations, and migrations. Provide technical oversight for security hardening, performance, CI/CD, and deployments. Collaborate with DevOps, security, UX, product, and cross-functional development teams while mentoring junior and mid-level engineers and supporting federal compliance requirements.

Research and validate novel browser-based device identification and bot-detection techniques, assess their real-world impact, build research automation tooling, monitor browser changes, and guide findings through engineering implementation. The role requires deep browser, JavaScript, web security, networking, reverse-engineering, experimentation, and large-scale data analysis expertise, plus clear communication with product and engineering teams.

Design, deploy, secure, and maintain scalable AWS infrastructure using Terraform and GitLab CI/CD. Provide application and cloud support, monitor systems, troubleshoot incidents, manage IAM, perform maintenance and backups, improve observability and reliability, and guide cloud architecture and deployment decisions. Collaborate with engineering, security, data, and infrastructure teams while supporting audits, documentation, disaster recovery, and on-call operations.