Top Front End Developer Jobs in Portland, ME

As a Senior Frontend Software Engineer, you'll design and develop high-performance, data-intensive applications, optimizing user experiences while collaborating with team members to enhance application quality and performance.

Lead technical direction and contribute to the frontend codebase, building user-facing tools and mentoring team engineers to enhance user experiences.

Build and maintain intuitive frontend web applications for data upload, search, visualization, and interactive 2D/3D geospatial tools. Collaborate with scientists to design complex visualizations, modernize the frontend stack, mentor junior developers, and implement automated UI testing and deployment pipelines.

Design and build scalable frontend features and reusable UI components using React and TypeScript. Collaborate with PMs, designers, and backend engineers on architecture, state management, API integration, performance, accessibility, and testing. Drive best practices for CI/CD, code quality, documentation, planning, and user experience.

Design, build, and maintain scalable React/TypeScript web applications for Keeper's Admin Console. Integrate with backend REST APIs, implement enterprise UI workflows (RBAC, policy config, audit views), ensure secure, well-tested frontend code, participate in architecture and code reviews, troubleshoot performance and usability, and maintain documentation.

The role involves developing and sustaining a mission-critical command and control system using React.js and TypeScript, optimizing frontend performance, and mentoring junior engineers in an Agile environment.

Build intuitive interfaces for construction workflows using React and TypeScript, optimizing performance and creating data-rich dashboards.

Lead front-end architecture and build high-performance React/TypeScript web applications, integrating with back-end APIs, ensuring type safety, testing, CI/CD, scalability, and UX for AI-driven orchestration workflows.

Build and ship production frontend features using modern web technologies (Vue.js/TypeScript). Collaborate with product in a cross-functional squad to iterate UX, deliver secure, stable code, and create reusable, testable components. Operate in an AI-first workflow using agentic tools, participate in Git-based development, and apply basic AWS services to solve business problems.

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.

Build and scale the frontend for a cloud-based mortgage origination platform. Lead React and TypeScript development, contribute to technical tooling and design system, collaborate with design and engineering to deliver production web applications handling complex data models.

Lead frontend development using React.js and Next.js, mentor junior developers, collaborate with cross-functional teams to design and deliver performant, scalable UIs, conduct code reviews, ensure technical feasibility of designs, troubleshoot issues, participate in agile ceremonies, and promote best practices including testing, SSR, and containerization.

Senior front-end developer role requiring extensive UI/frontend development experience building responsive, cross-browser web apps. Work with JavaScript/TypeScript, HTML5/CSS3/SCSS, RESTful APIs, AG Grid, GraphQL, and integrate front-end components with backend services. Use front-end build tools and Git, apply UI/UX best practices, unit testing, and design patterns to deliver highly interactive, scalable, resilient, low-latency applications. React exposure preferred.

Lead QA for API testing: design and execute RESTful API test cases (payment initiation/status), develop and maintain Pytest automation in Python, use Postman and Git, integrate tests into CI/CD, document results, identify and track defects, and collaborate with development and product teams to resolve issues.

Lead front-end development with Angular (v10+), building reusable components and integrating Angular apps with AEM (headless, content fragments, Sling Models). Collaborate with designers and back-end teams, ensure performance, accessibility, and SEO, participate in design discussions and code reviews, and maintain testing and CI/CD practices.

Develop and maintain Ubegos frontend products: mobile/web quest experiences, user and creator dashboards, admin panel, marketing features, and third-party integrations. Work in one-week Scrum sprints, perform code reviews, contribute to software architecture, and use modern frontend frameworks, relational databases, and AI-assisted coding tools.

Develop and maintain web application user interfaces using Vaadin and front-end technologies. Apply UI fundamentals (including Fitts' law), refactor enterprise applications, collaborate with clients, and mentor/train other front-end developers.

Lead frontend platform architecture across web and mobile: design and evolve design systems, component libraries, build tooling, accessibility, internationalization, and developer experience. Partner with backend teams on GraphQL/Python, maintain security and compliance, mentor engineers, drive cross-team initiatives, and deliver scalable, high-quality frontend foundations used by multiple product teams.

Join a product team to build and maintain large-scale frontend platforms. Lead frontend architecture, implement features using TypeScript, Lit, and Redux, write Jasmine tests, ensure WCAG accessibility, own technical delivery, mentor mid-level engineers, and collaborate with clients, designers, and cross-functional teams to drive stability and scalability.

Design and implement front-end features, build high-quality user interfaces, take ownership of product and architecture decisions, collaborate with engineering team, and deliver performant, user-focused solutions.

The Full-Stack Engineer will enhance backend functionality, collaborate with teams, and maintain platform performance and security, requiring expertise in Python.

Develop and maintain front-end and back-end components of AI-driven products, collaborating with teams to enhance user experience and build proof of concept products.