Senior Frontend Engineer (React/TypeScript) - Hybrid Lisbon (2–3 days/week office)

HumanIT Digital Consulting; Lisboa; Hybrid; EUR 28,000 - 37,000; Full time

Job summary

HumanIT Digital Consulting in Lisbon is seeking a Senior Frontend Engineer (React/TypeScript) for a hybrid role requiring 2–3 days in the office. You will contribute to a fintech project focusing on performance, security and user experience.

You should have strong React expertise, experience with component architecture and data fetching, and a track record of accessible, pixel-perfect UI. English communication and Lisbon office presence are essential.

Qualifications

• Proven experience delivering high-performance frontend applications.
• Strong React experience and understanding of component architecture, application state and data fetching.
• Ability to build responsive, data-intensive interfaces without compromising performance or usability.
• Exceptional attention to visual detail and pixel-accurate implementation.
• Experience developing accessible interfaces aligned with WCAG standards.
• Strong automated testing, debugging and performance optimisation practices.
• Ownership, curiosity and the confidence to question assumptions and explain technical decisions.
• Professional English communication skills.
• Availability to attend the central Lisbon office 2–3 days per week.

Responsibilities

• Contribute to automated testing and performance optimisation.
• Handle production debugging and documentation.
• Manage client-library versioning and collaboration with backend teams.

Skills

React

TypeScript

Frontend engineering

Performance optimization

Automated testing

WCAG accessibility

English proficiency

On-site availability

Job description

Senior Frontend Engineer (React/TypeScript) - Hybrid Lisbon (2–3 days/week office)

Job Openings Senior Frontend Engineer (React/TypeScript) - Hybrid Lisbon (2–3 days/week office)

About the job Senior Frontend Engineer (React/TypeScript) - Hybrid Lisbon (2–3 days/week office)

ABOUT THE OPPORTUNITY

Join HumanIT to work with an international fintech building enterprise payment technology. Help shape a growing engineering team in Lisbon and develop products where performance, security and user experience are critical.

This is a full-time opportunity with 2–3 days per week in the office, in central Lisbon near the Portuguese Parliament. Professional proficiency in English, both written and spoken, is required.

We are looking for technically outstanding engineers with deep frontend expertise. Full-stack engineers are welcome if frontend development is their strongest discipline. This role is not suitable for backend-focused engineers with only occasional frontend experience.

PROJECT & CONTEXT

You will contribute to automated testing, performance optimisation, production debugging, documentation and client-library versioning. Understanding backend services and APIs is valuable, but the role’s primary focus is frontend engineering excellence.

WHAT WE'RE LOOKING FOR (Required)

• Strong evidence of delivering sophisticated, high-performance frontend applications.
• Strong React experience and understanding of component architecture, application state and data fetching.
• Ability to build responsive, data-intensive interfaces without compromising performance or usability.
• Exceptional attention to visual detail and pixel-accurate implementation.
• Experience developing accessible interfaces aligned with WCAG standards.
• Strong automated testing, debugging and performance optimisation practices.
• Ownership, curiosity and the confidence to question assumptions and explain technical decisions.
• Professional English communication skills.
• Availability to attend the central Lisbon office 2–3 days per week.

NICE TO HAVE (Preferred)

• Experience building framework-agnostic SDKs, hosted fields or embedded checkout components.
• Node.js and Backend-for-Frontend experience, alongside a strong frontend specialisation.
• Experience in payments, fintech or e-commerce.
• Familiarity with PCI DSS and security-sensitive customer journeys.
• Experience using AI-assisted development tools with appropriate review and validation.

Compensation: €2.550 – €3.350/month net, depending on experience and seniority level.

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