Middle/Senior Front-End Developer

Sigma Software; Lisboa; Presencial; EUR 45 000 - 68 000; Tempo integral

Resumo da oferta

Sigma Software is seeking a Middle/Senior Front-End Engineer to build scalable, customer-facing features for onboarding, pricing, subscriptions, and payments. You will work with Product Managers, Designers, QA, and Back-End Engineers to deliver high-quality React/TypeScript solutions in a product-focused environment.

The role emphasizes technical excellence, product thinking, and collaboration across international teams.

Qualificações

• Strong React and TypeScript expertise
• Collaborative cross-functional teamwork
• Experience shaping onboarding, pricing, subscriptions and payments flows

Responsabilidades

• Develop and enhance customer-facing features focused on onboarding, pricing, subscriptions and payments
• Build scalable front-end apps using React and TypeScript
• Collaborate with Product Managers, Designers, QA and Back-End Engineers
• Participate in architectural decisions and solution design
• Ensure code quality via testing and static analysis
• Write automated UI and integration tests
• Contribute to engineering processes and developer experience
• Assist with back-end related implementation tasks when needed

Conhecimentos

React

TypeScript

UI/UX awareness

Testing

Ferramentas

Webpack

GitLab

GitLab CI

ELK stack

Tableau

PNPM

Miro

Claude Code

Descrição da oferta de emprego

Join a product-focused engineering team building experiences used by millions of users worldwide. We are looking for a Middle/Senior Front-End Engineer who is passionate about creating scalable customer-facing solutions and improving user journeys across onboarding, subscriptions, pricing, and payment flows.

You will work in a highly collaborative environment alongside Product Managers, Designers, QA Engineers, and Back-End Engineers to deliver impactful features that directly support business growth. This role is suitable for specialists with strong React and TypeScript expertise who enjoy combining technical excellence with product thinking.

We at Sigma Software offer the opportunity to work on meaningful large-scale products, influence technical decisions, grow within a mature engineering culture, and collaborate with experienced international teams. Remote/hybrid/on-site format, location, and employment type are to be confirmed.

CUSTOMER

Our Customer is an international product company operating a large-scale digital platform with millions of users globally. The company actively invests in improving customer acquisition, onboarding, trial experiences, subscription management, and payment solutions while maintaining a strong engineering and product culture focused on innovation, experimentation, and long-term growth.

PROJECT

You will join one of the product development teams responsible for customer growth and experience optimization initiatives. The team works on strategic product areas including pricing evolution, onboarding journeys, trial conversion, and payment experience improvements.

The project combines modern Front-end development practices with strong cross-functional collaboration and a data-driven product approach. Engineers are encouraged to contribute ideas, participate in technical discussions, and help improve development processes across teams.

Job Description

• Develop and enhance customer-facing product features focused on onboarding, pricing, subscriptions, and payment experiences
• Build scalable, maintainable, and high-quality Front-end applications using React and TypeScript
• Collaborate closely with Product Managers, Designers, QA Engineers, and Back-End Engineers in a cross-functional environment
• Participate in technical discussions, architecture decisions, and solution design activities
• Ensure code quality through testing, static analysis tools, and engineering best practices
• Write and maintain automated tests for UI and integration scenarios
• Participate in peer code reviews and knowledge-sharing initiatives
• Contribute to improving engineering processes, developer experience, and team collaboration
• Support continuous improvement initiatives that increase engineering efficiency and product quality
• Assist with Back-end related implementation tasks when needed

Qualifications

WILL BE A PLUS

• Experience with Webpack
• Familiarity with GitLab and GitLab CI
• Experience using ELK stack and Tableau
• Knowledge of PNPM
• Experience with collaboration tools such as Miro
• Exposure to AI-assisted development tools such as Claude Code
• Understanding of Back-end development concepts

Additional Information

PERSONAL PROFILE

• Strong team player with a collaborative mindset
• Product-oriented thinking and customer-focused approach
• Passion for learning and continuous improvement
• Proactive attitude toward innovation and process enhancement
• Ownership mentality and willingness to contribute to team success
• Openness to knowledge sharing and mentoring culture