Top Senior Javascript Jobs

Own the specification, design, and implementation of features for FareHarbor’s large-scale web application. Collaborate with product team members, develop scalable and performant full-stack solutions, improve automated testing, resolve technical challenges, and participate in code reviews. The role requires strong Python and JavaScript skills, experience with front-end and back-end frameworks, relational databases, performance optimization, and agile development.

Own the specification, design, and implementation of features for FareHarbor’s large-scale web application. Collaborate with product teammates, develop scalable and performant full-stack solutions, improve automated testing, resolve technical issues, and participate in code reviews. The role requires strong Python and JavaScript skills, experience with front-end and back-end frameworks, relational databases, and production scalability challenges.

Designs, develops, tests, deploys, documents, maintains, and debugs scalable production software. Serves as technical owner for complex services, collaborates with product and platform teams, translates business requirements into technical solutions, and mentors engineers while balancing quality, performance, and risk.

Lead end-to-end technical initiatives for enterprise web platforms, make cross-team architectural decisions, establish engineering standards, and promote AI-native development practices. Advise and influence engineering teams, collaborate with product and design leadership, mentor engineers, support interviewing and onboarding, and build high-traffic front-end experiences using JavaScript, Angular, React, Node.js, HTML, CSS, and TypeScript.

Build and maintain full‑stack web applications using Vue/Nuxt, TypeScript, Node.js and AWS. Implement SSR/SSG apps, reusable components, APIs, integrations with CMS and third‑party services, and improve performance, accessibility, SEO, monitoring, and AI-enabled marketing workflows. Participate in reviews, debugging, and cross‑functional collaboration.

Design and build AI-centric full‑stack TypeScript web applications (SPAs and APIs). Collaborate on product and architecture, own technical decisions, mentor peers, perform code reviews, and manage project priorities and deliverables.

As a Senior Full-Stack Software Engineer, you will build AI-centric web applications in TypeScript, manage project priorities, and make technology decisions while collaborating with Product and Design teams.

Evaluate AI coding-agent interactions for usefulness, correctness, engineering judgment, explanation quality, and user trust. Provide rigorous, opinionated feedback distinguishing response quality levels and help define best practices for tools such as OpenAI Codex, Claude Code, and Cursor. This contract role requires experienced software engineering judgment rather than production coding.

Develop and maintain full-stack applications using modern JavaScript frameworks, manage cloud infrastructure, and ensure code quality through testing.

The Software Systems Engineer designs, codes, analyzes, tests, debugs, and implements complex software applications, focusing on frontend development using JavaScript and database management.

Looking for a JavaScript developer with strong database skills to design and code applications, implement solutions, and troubleshoot software issues.

The Sr JavaScript (React) Developer will make software design decisions, mentor team members, and develop, test, and deliver project tasks using Agile methodology.

Lead and develop front-end applications using HTML, CSS, and JavaScript, mentoring junior developers and ensuring code quality. Collaborate with cross-functional teams to deliver innovative solutions.

The role involves leading the development of a high-performance Web SDK for fraud detection and risk management, implementing algorithms for device fingerprinting, and ensuring security and performance optimization.

Seeking a Senior Software Engineer specializing in JavaScript, React, and Node.js to develop modern web applications and utilize AI in development workflows.

Develop and maintain high-scale JavaScript and TypeScript monetization solutions using Prebid.js, Prebid Server, Google Ad Manager, and header bidding technologies. Own wrapper architecture, integrations, performance, releases, and reliability. Monitor Core Web Vitals and client-side efficiency while reviewing code, tracking ad tech standards, and contributing to platform improvements. Collaborate independently across a distributed engineering team and resolve production issues.

Take end-to-end ownership of backend features and SaaS services in a microservices architecture. Design, implement, deploy, and operate scalable, reliable Node.js services. Work with Redis Streams, MongoDB, Kubernetes, and ensure test coverage, performance tuning, and collaboration with cross-functional teams.

Design and build full-stack applications that expose AI/ML insights. Develop backend services in Python, RESTful APIs, and containerized microservices. Build high-performance front-end interfaces with React/Vue/Angular. Implement cloud-native solutions on Google Cloud or Azure, manage relational and NoSQL databases, apply testing and CI/CD, and participate in Agile development and architecture sessions.

Build responsive, accessible React frontends and Node.js backend services; use AI-assisted development tools responsibly to accelerate implementation, testing, and refactoring; follow TDD, CI/CD, and automated testing; collaborate with UX, product, and QA; contribute to hiring and knowledge sharing for the London engineering team.

Design, build, and optimize responsive React-based user interfaces. Translate designs into reusable components, integrate with RESTful APIs, ensure cross-browser performance, participate in code reviews, deploy/manage front-end apps on GCP, and troubleshoot front-end issues to deliver scalable, high-quality web applications.

As a Senior Full-Stack Software Engineer, you will develop AI-centric web applications, participate in architectural decisions, and mentor team members while managing project priorities and deliverables.

Maintain and extend long-term supported forks of major JavaScript frameworks. Develop and secure code in JavaScript/TypeScript, backport fixes, triage and patch CVEs, build CI/CD and automation, collaborate with security and OSS contributors, and drive platform reliability and architecture decisions.

Develop user-centric, accessible front-end web applications in collaboration with UI/UX designers and back-end developers using JavaScript and React. Ensure cross-browser/platform compatibility, meet accessibility and security requirements, participate in code reviews, mentoring, and support back-end development as needed.

Design and implement robust backend architectures using Node.js and TypeScript, focusing on scalable services and pipelines, while ensuring code integrity and optimizing performance.

Design, develop, test, debug, troubleshoot, and implement software components for intermediate-complexity systems. Participate in incident resolution, impact analysis, monitoring/alerting, and collaborate with the team to deliver steady, incremental releases.