Senior Front End Engineer

Soul of the Machine; Lisboa; On-site; EUR 50,000 - 75,000; Full time

Job summary

Soul of the Machine is seeking an experienced front-end engineer to design and develop sophisticated interfaces for agentic AI platforms in Lisbon. You will collaborate with AI engineers and product teams to create intuitive UI/UX and robust front-end architecture that makes advanced AI capabilities accessible to enterprise clients.

Responsibilities include building high-performance apps, integrating with real-time data, mentoring teammates, and shaping front-end decisions with a focus on

Qualifications

• 5+ years of professional front-end development experience.

Responsibilities

• Build responsive, high-performance web applications using React and Vue.js for AI-driven solutions.
• Collaborate with AI/ML teams to integrate agentic AI capabilities into user-facing applications.
• Design and implement real-time dashboards, conversational interfaces, and data visualization components.
• Optimize applications for performance, scalability, and seamless user experience.
• Work closely with clients to understand requirements and deliver customized AI interface solutions.
• Mentor junior developers and contribute to front-end architecture decisions.

Skills

Front-end development

API integration

State management

TypeScript

HTML5

CSS3

Testing frameworks

Tools

Redux

Vuex

Pinia

Job description

Join our dynamic technology consulting team where you'll design and develop sophisticated front-end experiences for agentic AI platforms. You'll collaborate with AI engineers and product teams to create intuitive interfaces that make complex AI capabilities accessible to enterprise clients. This role offers the opportunity to shape the future of human-AI interaction through thoughtful UI/UX design and robust front-end architecture.

Key Responsibilities:

• Build responsive, high-performance web applications using React and Vue.js for AI-driven solutions
• Collaborate with AI/ML teams to integrate agentic AI capabilities into user-facing applications
• Design and implement real-time dashboards, conversational interfaces, and data visualization components
• Optimize applications for performance, scalability, and seamless user experience
• Work closely with clients to understand requirements and deliver customized AI interface solutions
• Mentor junior developers and contribute to front-end architecture decisions

Qualifications

Required:

• 5+ years of professional front-end development experience
• Experience building applications that integrate with APIs and real-time data streams
• Strong understanding of state management (Redux, Vuex, Pinia)
• Proficiency in TypeScript, HTML5, CSS3, and responsive design principles
• Experience with testing frameworks (Jest, Cypress, or similar)

Preferred:

• Previous experience building interfaces for AI/ML applications or chatbots
• Familiarity with WebSockets, server-sent events, and real-time communication
• Knowledge of data visualization libraries (D3.js, Chart.js, or similar)
• Experience with cloud platforms (AWS, Azure, GCP) and containerization
• Understanding of AI/ML concepts and conversational AI interfaces
• Background in enterprise software development and client-facing roles