FullStack JS Developer Job at Extia (Barcelona)

Senior Fullstack Engineer (JS)

We are looking for a Senior FullStack Engineer to join a venture-backed startup ...

Location

Salary:

Not provided

Zoolatech

Expiration Date

Until further notice

Requirements

Totally 5+ YOE as a FullStack engineer with the knowledge and experience in designing and implementing scalable, reliable systems
Backend (the main skill): Node.js, PostgreSQL, RESTful APIs
Frontend: HTML, CSS, JavaScript, Typescript, modern frameworks (React, Vue, or similar)
Experience with cloud platforms(Microsoft Azure, AWS), Docker, Kubernetes, CI/CD pipelines
Building and maintaining automated testing and deployment pipelines
SQL and database optimization (PostgreSQL preferred)
Ownership mindset and end-to-end project delivery
Startup mentality and ability to work in fast-paced environments
Problem-solving and debugging complex issues
Cross-functional team collaboration

Job Responsibility

Design, develop, and deploy core components of the AI-driven platform, ensuring scalability, security, quality and high performance
Collaborate closely with cross-functional teams to deliver rapid iterations and improvements
Make strategic technical decisions that define the architecture, tools, and frameworks used across the platform
Integrate AI and LLM-based technologies into production-ready solutions for real-time user interactions
Investigate and resolve real-world performance issues, ensuring reliability and exceptional user experience
Contribute to shaping technical culture and best practices, including mentoring and supporting future engineering hires
Take part in production support duty during daylight hours (7 AM EST – midday EST), including incidents monitoring and troubleshooting as needed

What we offer

Paid Vacation
Sick Days
Floating Holidays
Sport/Insurance Compensation
English Classes
Charity
Training Compensation

Fullstack Developer

Join us on our exciting journey in perhaps the most significant and forward-look...

Location

Germany , Düsseldorf

Salary:

Not provided

Freshcells

Expiration Date

Until further notice

Requirements

Very good knowledge of Node.js
Strong knowledge of ES 6 JavaScript as well as extensive knowledge of frameworks and libraries such as reactJS, vue.js and/or Angular
Experience of PHP, ideally with frameworks such as Symfony, Laravel or Yii
Sound experience with relational or non-relational databases
Good knowledge of data structure design
Competences in consuming and creating web services based on ReST and especially GraphQL
Know-how in performance optimization
Basic knowledge of HTML and CSS is helpful
Experience with agile development in a team
Hands-on experience with automated software testing

Job Responsibility

Development of modern backend applications based on Node.Js
Development of modern frontend applications based on React JS
Development of APIs based on GraphQL
Design and implementation of new features for sophisticated software solutions in cooperation with project management, design, and development departments
Writing and maintaining our automated test suites
Participation in continuous improvement processes

What we offer

Flexible home office days
Flex-time for early risers and night owls
A dog-friendly working environment
A secure and long-term job
Company pension plan with employer subsidy possible
Regular exchange, feedbacks, team meetings & retrospectives
Monthly Company Breakfast
Room for own ideas and personal development
Digital training courses, available to every employee at his or her own discretion
Subsidy for Urban Sports Club membership

Fulltime

Senior Fullstack Engineer

We are looking for a Senior FullStack Engineer to join a venture-backed startup ...

Location

Turkey , Istanbul

Salary:

Not provided

Zoolatech

Expiration Date

Until further notice

Requirements

Totally 5+ YOE as a FullStack engineer with the knowledge and experience in designing and implementing scalable, reliable systems
Backend (the main skill): Node.js, PostgreSQL, RESTful APIs
Frontend: HTML, CSS, JavaScript, Typescript, modern frameworks (React, Vue, or similar)
Experience with cloud platforms(Microsoft Azure, AWS), Docker, Kubernetes, CI/CD pipelines
Building and maintaining automated testing and deployment pipelines
SQL and database optimization (PostgreSQL preferred)
Ownership mindset and end-to-end project delivery
Startup mentality and ability to work in fast-paced environments
Problem-solving and debugging complex issues
Cross-functional team collaboration

Job Responsibility

Design, develop, and deploy core components of the AI-driven platform, ensuring scalability, security, quality and high performance
Collaborate closely with cross-functional teams to deliver rapid iterations and improvements
Make strategic technical decisions that define the architecture, tools, and frameworks used across the platform
Integrate AI and LLM-based technologies into production-ready solutions for real-time user interactions
Investigate and resolve real-world performance issues, ensuring reliability and exceptional user experience
Contribute to shaping technical culture and best practices, including mentoring and supporting future engineering hires
Take part in production support duty during daylight hours (7 AM EST – midday EST), including incidents monitoring and troubleshooting as needed

What we offer

Paid Vacation
Hybrid Work (home/office)
Sick Days
Sport/Insurance Compensation
Holidays Day Off
English Classes
Training Compensation
Transportation compensation

Senior Fullstack Engineer

We are looking for a Senior FullStack Engineer to join a venture-backed startup ...

Location

Salary:

Not provided

Zoolatech

Expiration Date

Until further notice

Requirements

Totally 5+ YOE as a FullStalk engineer with the knowledge and experience i designing and implementing scalable, reliable systems
Backend (the main skill): Node.js, PostgreSQL, RESTful APIs
Frontend: HTML, CSS, JavaScript, Typescript, modern frameworks (React, Vue, or similar)
Experience with cloud platforms(Microsoft Azure, AWS), Docker, Kubernetes, CI/CD pipelines
Building and maintaining automated testing and deployment pipelines
SQL and database optimization (PostgreSQL preferred)
Ownership mindset and end-to-end project delivery
Startup mentality and ability to work in fast-paced environments
Problem-solving and debugging complex issues
Cross-functional team collaboration

Job Responsibility

Design, develop, and deploy core components of the AI-driven platform, ensuring scalability, security, quality and high performance
Collaborate closely with cross-functional teams to deliver rapid iterations and improvements
Make strategic technical decisions that define the architecture, tools, and frameworks used across the platform
Integrate AI and LLM-based technologies into production-ready solutions for real-time user interactions
Investigate and resolve real-world performance issues, ensuring reliability and exceptional user experience
Contribute to shaping technical culture and best practices, including mentoring and supporting future engineering hires
Take part in production support duty during daylight hours (7 AM EST – midday EST), including incidents monitoring and troubleshooting as needed

What we offer

Paid Vacation
Sick Days
Floating Holidays
Sport/Insurance Compensation
English Classes
Charity
Training Compensation

Fulltime

Senior Fullstack Engineer

We are looking for a Senior FullStack Engineer to join a venture-backed startup ...

Location

Salary:

Not provided

Zoolatech

Expiration Date

Until further notice

Requirements

Totally 5+ YOE as a FullStalk engineer with the knowledge and experience i designing and implementing scalable, reliable systems
Backend (the main skill): Node.js, PostgreSQL, RESTful APIs
Frontend: HTML, CSS, JavaScript, Typescript, modern frameworks (React, Vue, or similar)
Experience with cloud platforms(Microsoft Azure, AWS), Docker, Kubernetes, CI/CD pipelines
Building and maintaining automated testing and deployment pipelines
SQL and database optimization (PostgreSQL preferred)
Ownership mindset and end-to-end project delivery
Startup mentality and ability to work in fast-paced environments
Problem-solving and debugging complex issues
Cross-functional team collaboration

Job Responsibility

Design, develop, and deploy core components of the AI-driven platform, ensuring scalability, security, quality and high performance
Collaborate closely with cross-functional teams to deliver rapid iterations and improvements
Make strategic technical decisions that define the architecture, tools, and frameworks used across the platform
Integrate AI and LLM-based technologies into production-ready solutions for real-time user interactions
Investigate and resolve real-world performance issues, ensuring reliability and exceptional user experience
Contribute to shaping technical culture and best practices, including mentoring and supporting future engineering hires
Take part in production support duty during daylight hours (7 AM EST – midday EST), including incidents monitoring and troubleshooting as needed

What we offer

Paid Vacation
Sick Days
Floating Holidays
Sport/Insurance Compensation
English Classes
Charity
Training Compensation

Fullstack NodeJS Developer

Location

Vietnam , Ho Chi Minh

Salary:

Not provided

Saigon Technology

Expiration Date

Until further notice

Requirements

At least 4 years of experience in NodeJS/ReactJS and its ecosystem
Proficiency in TypeScript/Javascript
Strong understanding of RESTful APIs and web services
Experience with real-time processing and concurrency
Understanding of system architecture design
Knowledge and application of programming principles and design patterns
Familiarity with version control systems, particularly Git
Knowledge of software development best practices, including code reviews, testing, and CI/CD
Excellent problem-solving skills and attention to detail
Ability to work collaboratively in a team environment

Job Responsibility

Analyze requirements and design software system features
Develop and maintain software systems
Recommending and implementing improvements to processes and technologies
Developing high-performance applications by writing testable, reusable, and efficient code
Review code and work output of other team members
Train and support other team members
Collect lessons learned, best practices, and new knowledge from experience and incorporate them into the company knowledge base

What we offer

Competitive Salary and Brilliant Health Benefits
Attractive salary (13th-month salary, salary review twice/year) and project bonus
Bonus programs for candidate referral, technical article writing
Allowance for sickness, maternity, paternity and periodic health examination
PVI health care program
The staff of the quarter and year reward
Progressive and Fun Working Environment
A professional English-speaking working environment with Agile – Scrum model
Hybrid Working Model: Flexible working time and WFH support
Surrounded with friendly, open-minded, young and supportive colleagues

Fulltime

Infrastructure Engineer, Automation and Tooling, Fullstack (Robotics)

Meta is looking for a talented, highly motivated engineer to join the Production...

Location

United States , Menlo Park

Salary:

162000.00 - 227000.00 USD / Year

Fullstack Developer

Join us on our exciting journey in perhaps the most significant and forward-look...

Location

Germany , Düsseldorf

Salary:

Not provided

Freshcells

Expiration Date

Until further notice

Requirements

Very good knowledge of Node.js
Strong knowledge of ES 6 JavaScript as well as extensive knowledge of frameworks and libraries such as reactJS, vue.js and/or Angular
Experience of PHP, ideally with frameworks such as Symfony, Laravel or Yii
Sound experience with relational or non-relational databases
Good knowledge of data structure design
Competences in consuming and creating web services based on ReST and especially GraphQL
Know-how in performance optimization
Basic knowledge of HTML and CSS is helpful
Experience with agile development in a team
Hands-on experience with automated software testing

Job Responsibility

Development of modern backend applications based on Node.Js
Development of modern frontend applications based on React JS
Development of APIs based on GraphQL
Design and implementation of new features for sophisticated software solutions in cooperation with project management, design, and development departments
Writing and maintaining our automated test suites
Participation in continuous improvement processes

What we offer

Flexible home office days
Flex-time for early risers and night owls
A dog-friendly working environment
A secure and long-term job
Company pension plan with employer subsidy possible
Regular exchange, feedbacks, team meetings & retrospectives
Monthly Company Breakfast
Room for own ideas and personal development
Digital training courses, available to every employee at his or her own discretion
Subsidy for Urban Sports Club membership

Fulltime

FullStack JS Developer

Extia

Location:
Spain , Barcelona

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
December 08, 2025

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