Fullstack Engineer - React & Node/Python (PWA Specialty)

Talan; Bogotá; On-site; COP 153,885,611 - 241,820,247; Full time

Job summary

Talan is seeking a Fullstack Developer for a 4-month contract to deliver a React-based mobile project with a strong focus on performance, offline capabilities, and data synchronization. You will build a mobile-first PWA using React and TypeScript, connect APIs to PostgreSQL, and ensure robust offline functionality and optimized user experience.

Remote position with Spain time zone. 3+ years of experience and expertise in Python/FastAPI or Node.js, OAuth 2.0, and cloud deployments are highly

Qualifications

• 3+ years of experience in mobile-first PWA development with React and TypeScript.
• Experience developing APIs with Python/FastAPI and/or Node.js.
• Experience working with PostgreSQL.
• Experience with offline-first applications or limited connectivity environments.
• Experience with caching strategies and offline functionality in PWAs.
• Hands-on experience with Service Workers and IndexedDB.
• Experience in image management and optimization for web/mobile applications.
• Experience in client-server synchronization and offline data management.
• Experience with OAuth 2.0 and/or Microsoft Entra ID (Azure AD).
• Experience with deployments on AWS and/or Azure.
• Experience in web/mobile performance optimization.
• Strong understanding of mobile-oriented UI/UX.
• Ability to work autonomously and contribute to architectural decisions.

Responsibilities

• Analyze, design, and develop the project end-to-end.
• Develop a mobile-first PWA using React and TypeScript.
• Design and develop APIs connected to PostgreSQL.
• Implement processes for efficient image management and storage.
• Implement client-server synchronization processes and offline functionality.
• Analyze and optimize application performance and architecture.
• Define mobile-oriented UI/UX solutions.
• Integrate authentication using OAuth 2.0 with Microsoft.
• Handle the deployment of the solution.

Skills

React

TypeScript

OAuth 2.0

IndexedDB

Service Workers

PostgreSQL

Offline-first

Caching strategies

Performance optimization

UI/UX design

Microsoft Entra ID

AWS

Azure

Python/FastAPI

Node.js

Git

Docker

Web security

Tools

FastAPI

Git

Docker

AWS

Azure

Job description

Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7,200 consultantsin 21 countriesand a turnover of €850M, we are committed to delivering impactful, future-ready solutions.

Talan at a Glance

Headquartered in Paris and operating globally, Talan combines technology, innovation, and empowermentto deliver measurable results for our clients. Over the past 22 years, we’ve built a strong presence in the IT and consulting landscape, and we’re on track to reach €1 billion in revenuethis year.

Our Core Areas of Expertise

Data & Technologies:We design and implement large-scale, end-to-end architecture and data solutions, including data integration, data science, visualization, Big Data, AI, and Generative AI.

Cloud & Application Services:We integrate leading platforms such as SAP, Salesforce, Oracle, Microsoft, AWS, and IBM Maximo, helping clients transition to the cloud and improve operational efficiency.

Management & Innovation Consulting:We lead business and digital transformation initiativesthrough project and change management best practices (PM, PMO, Agile, Scrum, Product Ownership), and support domains such as Supply Chain, Cybersecurity, and ESG/Low-Carbon strategies.

We work with major global clients across diverse sectors, including Transport & Logistics, Financial Services, Energy & Utilities, Retail, and Media & Telecommunications.

Job Description

Contract Type: Temporary / Contract (4 months)

We are looking for a Fullstack Developer with at least 3 years of experience in mobile application development using Progressive Web Apps (PWA) to participate in the end-to-end delivery of a React-based mobile project. Please note this is a 4-month temporary contract.

The selected candidate will work on a solution with a strong focus on performance, user experience, offline functionality, and efficient data synchronization.

Responsibilities

• Analyze, design, and develop the project end-to-end.
• Develop a mobile-first PWA using React and TypeScript.
• Design and develop APIs connected to PostgreSQL.
• Implement processes for efficient image management and storage.
• Implement client-server synchronization processes and offline functionality.
• Analyze and optimize application performance and architecture.
• Define mobile-oriented UI/UX solutions.
• Integrate authentication using OAuth 2.0 with Microsoft.
• Handle the deployment of the solution.

Qualifications

• 3+ years of experience in mobile-first PWA development with React and TypeScript.
• Experience developing APIs with Python/FastAPI and/or Node.js.
• Experience working with PostgreSQL.
• Experience with offline-first applications or limited connectivity environments.
• Experience with caching strategies and offline functionality in PWAs.
• Hands-on experience with Service Workers and IndexedDB.
• Experience in image management and optimization for web/mobile applications.
• Experience in client-server synchronization and offline data management.
• Experience with OAuth 2.0 and/or Microsoft Entra ID (Azure AD).
• Experience with deployments on AWS and/or Azure.
• Experience in web/mobile performance optimization.
• Strong understanding of mobile-oriented UI/UX.
• Ability to work autonomously and contribute to architectural decisions.

Nice to Have / Optional

• Experience with offline-first architectures and data synchronization conflict resolution.
• Experience with Microsoft Graph API, particularly integration with Microsoft Teams and email services for sending notifications.

Additional Information

• B2B or freelancer contract.

Remote position working in the Spain time zone.

Be part of a multicultural team working on international projects.

Temporary / Contract (4 months)

Talan Spain’s commitment to non-discrimination based on gender, race, ideology, or any other reason, in accordance with the company’s "Equality Plan" and the current regulations on gender equality between women and men (Royal Decree-Law 6/2019).