Senior React Developer

Level

Senior

Department

React

Type

Full Time

Project

Connecteam

Locations:

Portugal

Job Details

Posted on:

October 15, 2025

Job ID:

About the Company

Established in 2004, ALLSTARSIT was founded with a clear vision: to enhance the landscape of global IT employment by bridging the gap between companies and skilled professionals. The core belief was that assembling a team shouldn't be hindered by geographical constraints. Fast forward to the present day, ALLSTARSIT stands as an international outstaffing service provider committed to change the way businesses recruit, compensate, and oversee top talent worldwide.

With operational hubs scattered across Europe, Asia, and LATAM, and its headquarters situated in San Francisco, US, the company boasts a workforce of over 1,000 adept professionals. Spanning across more than 20 countries, ALLSTARSIT offers a diverse range of skilled employees across various verticals, including AI, cybersecurity, healthcare, fintech, telecom, media, and so on.

About the Project

Connecteam is a fast-growing startup that is on a mission to change the deskless work experience. With over 3.8 billion deskless workers across the globe, the challenges and potential are endless.
We are looking for an experienced developer to further develop the Connecteam platform. You will build a product that customers love and use daily — a product that is fun to use, fast, reliable, and scalable. You will tackle a wide array of problems, from developing a UI that is responsive and engaging to choosing the right backend technologies to solve specific product use cases at scale.

Specialization

Headquarters

Years on the market

Team size and structure

Current technology stack

Required skills:

5+ years of experience working with frontend (React) at scale
Experience with a wide variety of technical tools such as different database types, queues, design patterns, and architectures
Ability to understand the pros and cons of different architecture decisions and select the best options
Experience scaling services to millions of users
Understanding of the complexity of web technology, constraints, UI/UX
Experience with State Management libraries (MobX, Redux)
Experience developing robust frontend in React

Advantages:
Experience with running production workloads on AWS/Azure platforms
Experience working with AI tools and technologies, including integration of AI APIs, prompt engineering, or building features powered by machine learning models
Experience with any back-end language is preferred

Scope of work:

As a Senior React Developer, you will be assigned to one of our product groups consisting of representatives from sales, customer success, support, data, marketing, and R&D. Each group member contributes inputs from their respective team. The goal is to gain a holistic view of your part of the product to make informed decisions.
Together with your product group, you will understand customer use cases and needs, define the roadmap, and plan weekly sprints. Additionally, as the developer in the group, you will be responsible for pushing your product forward technically - including solving bugs, planning architecture, coding features, and deploying updates to production.