CrawlJobs Logo

Freelance Senior Full Stack Developer

bluselection.com Logo

Blu Selection

Location Icon

Location:
Spain , Barcelona

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
B2B

Salary Icon

Salary:

Not provided
Save Job
Save Icon
Apply Position

Job Description:

We are looking for a Senior Full Stack Developer to join our team and contribute to the development of a new web platform built with modern JavaScript technologies. You will collaborate closely with the Tech Lead, Product Owner, UX Designer, and Data team to design, develop, and deliver high-quality features within an agile environment. This role requires strong expertise in front-end engineering (React/Next.js), solid understanding of backend APIs, and the ability to write scalable, maintainable code.

Job Responsibility:

  • Develop and maintain complex, data-heavy user interfaces using React and Next.js
  • Build and optimise reusable components and contribute to the internal UI library
  • Design and integrate REST APIs and WebSocket endpoints
  • Ensure code quality through clean architecture and best practices
  • Write unit and integration tests (Jest / Testing Library)
  • Collaborate with Product, UX, and Data to deliver features end-to-end
  • Participate in architecture discussions and decision-making
  • Troubleshoot and resolve issues across the stack
  • Contribute to CI/CD processes and development workflow improvements
  • Maintain documentation on Confluence

Requirements:

  • 5+ years of experience as a Full Stack or Front-End Engineer
  • Strong hands-on experience with React.js and Next.js
  • Advanced knowledge of JavaScript and TypeScript
  • Experience building and consuming REST APIs
  • Good understanding of backend technologies (Node.js required
  • Python/FastAPI is a plus)
  • Experience with component libraries, design systems, or shared UI components
  • Familiarity with modern testing frameworks (Jest, Testing Library)
  • Good understanding of performance, security, and scalability principles
  • Comfortable working in cross-functional agile teams
  • Strong communication skills in English

Nice to have:

  • Experience with container technologies (Docker, AWS ECR/EKS, OpenShift)
  • Experience with CI/CD pipelines
  • Knowledge of SonarQube, Checkmarx, or similar code quality tools
  • Experience in healthcare, pharma, or other regulated environments
What we offer:
  • Fixed daily rate: €525/day
  • 3-month contract, renewable depending on performance and roadmap

Additional Information:

Job Posted:
December 27, 2025

Employment Type:
Fulltime
Work Type:
Hybrid work
Icon
Blu Selection - All Job Offers
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Freelance Senior Full Stack Developer

Freelance Tech Lead

Freelance Tech Lead for an International Life Sciences Innovation client. The pr...
Location
Location
Spain , Barcelona
Salary
Salary:
Not provided
bluselection.com Logo
Blu Selection
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Proven experience as a Tech Lead, Lead Engineer, or Senior Full-Stack Developer
  • Strong understanding of modern web architectures, cloud platforms, and API integrations
  • Experience leading cross-functional engineering teams
  • Solid understanding of Agile methodologies and iterative delivery
  • Ability to make architectural decisions and communicate them clearly
  • Excellent communication and leadership skills
  • Fluency in English (French is a plus)
  • Availability to work onsite in Barcelona 3 days/week
Job Responsibility
Job Responsibility
  • Define the technical architecture, frameworks, and tools for the platform
  • Ensure strong scalability, performance, security, and reliability
  • Evaluate technical options and make strategic recommendations
  • Oversee and guide the engineering team throughout the development cycle
  • Ensure timely delivery of Version 1 in alignment with the March deadline
  • Review code, ensure development best practices, and maintain high-quality standards
  • Coordinate integrations with internal systems, APIs, and data flows
  • Work closely with the Product Owner, UX Designers, and Researchers to align technical decisions with user and business needs
  • Translate product requirements into clear technical specifications
  • Identify risks, dependencies, and propose mitigation plans
What we offer
What we offer
  • Lead the technical delivery of a high-visibility digital platform
  • Work with a multi-disciplinary international team
  • Contribute to innovation in the life sciences sector
  • Freelance contract with a Daily Rate of 675€
Read More
Arrow Right
New

Senior Full-Stack Developer (Freelance)

The company: A well-established European fintech business operating across multi...
Location
Location
Europe, United States
Salary
Salary:
Not provided
signifytechnology.com Logo
Signify Technology
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of fullstack development experience with strong TypeScript and Node.js skills
  • 2+ years of experience with Vue.js (or comparable frameworks such as React or Angular)
  • Solid understanding of microservices architecture and relational/NoSQL databases (e.g. PostgreSQL)
  • Hands-on experience with GCP, Kubernetes, and containerised deployments
  • Proficiency with CI/CD tooling and testing frameworks (Jest, Cypress)
  • Experience with component libraries, design systems, and frontend architecture best practices
  • Strong communicator with a collaborative, mentoring mindset
  • Fintech or payments industry experience is a plus
Job Responsibility
Job Responsibility
  • Architect, develop, and maintain end-to-end fullstack solutions using TypeScript, Node.js, and Vue.js
  • Build and scale microservices with a focus on performance and reliability
  • Implement Infrastructure as Code (IaC) using Terraform or Pulumi
  • Manage cloud infrastructure on GCP, leveraging Kubernetes for container orchestration
  • Build and maintain CI/CD pipelines (CircleCI, GitHub Actions, ArgoCD)
  • Monitor and troubleshoot system performance using observability tooling (e.g. Datadog)
  • Deliver responsive, mobile-first, cross-browser UIs to a high standard
  • Collaborate closely with product, design, and engineering teams
  • Mentor junior team members and support knowledge sharing across the team
Read More
Arrow Right
New

Onsite Endoscopic Specialist

At KARL STORZ, we are driven by a mission to enhance global health through innov...
Location
Location
United States , Arlington
Salary
Salary:
Not provided
karlstorz.com Logo
KARL STORZ
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • A minimum of high school diploma or equivalent
  • Experience in Sterile Processing, Sales, or other Surgical Technology/Medical role
  • Our successful candidate will have excellent written and spoken English language business communication skills. They will also have demonstrated success working in a collaborative, service-oriented team environment.
  • Effective communicator, collaborative, and effective time management
  • Possess exceptional organizational skills and the ability to multi-task
  • MS Office - proficient user as the role will need to work with Excel spreadsheets and reporting
  • Role requires the completion of a drug screening for safety-sensitive positions
  • Must be able to lift/push/pull up to 25lbs
Job Responsibility
Job Responsibility
  • Face-to-face customer support, including OR, SPD and Biomed
  • Video tower/system set-up and support
  • Inspection, repair, troubleshooting and replacement of KARL STORZ devices
  • Monitoring, reporting, and facilitating repair/ exchange transactions
  • Transporting, cleaning/sterilization and packaging of instruments after use
  • Trouble shoot video and instrument issues in the O.R.
  • Instrument/equipment repair management
What we offer
What we offer
  • Relocation Support
  • Professional Growth & Development
  • Collaborative & Dynamic Work Environment
  • Access to Cutting-Edge Medical Technologies
  • Medical / Dental / Vision including a state-of-the-art wellness program and pet insurance, too
  • 3 weeks vacation, 11 holidays plus paid sick time
  • Up to 8 weeks of 100% paid company parental leave
  • 401(k) retirement savings plan providing a match of 60% of the employee’s first 6% contribution (up to IRS limits)
  • Section 125 Flexible Spending Accounts
  • Life, STD, LTD & LTC Insurance
  • Fulltime
Read More
Arrow Right
New

Pharmacy Technician

We’re building a world of health around every individual — shaping a more connec...
Location
Location
United States , Columbus
Salary
Salary:
17.00 USD / Hour
https://www.cvshealth.com/ Logo
CVS Health
Expiration Date
July 11, 2026
Flip Icon
Requirements
Requirements
  • Must comply with any state board of pharmacy requirements or laws governing the practice of pharmacy, which includes but is not limited to, age, education, and licensure/certification
  • If the state board of pharmacy does not address or mandate a minimum age requirement, must be at least 16 years of age
  • If the state board of pharmacy does not address or mandate a minimum educational requirement, must have a high school diploma or equivalent, or be actively enrolled in high school or high school equivalency program
Job Responsibility
Job Responsibility
  • Living our purpose by following all company SOPs at each workstation to help our Pharmacists manage and improve patient health
  • Following pharmacy workflow procedures at each pharmacy workstation (i.e., production, pick-up, drive-thru, and drop-off) for safe and accurate prescription fulfillment
  • Contributing to positive patient experiences by showing empathy and genuine care: creating heartfelt and personalized moments while serving patients at pick-up, drive-thru, and over the phone
  • keeping patients healthy by offering immunizations and other services at the register and over the phone
  • and demonstrating compassionate care by solving or escalating patient problems
  • Completing basic inventory activities, as permitted by law, and as directed by the pharmacy leadership team, such as accurately putting away medication deliveries and completing cycle counts, returns-to-stocks, waiting bin inventories, etc.
  • Contributing to a high-performing team, embracing a growth mindset, and being receptive to feedback
  • actively seeking opportunities to expand clinical and technical knowledge needed to better assist patients
  • Remaining flexible for both scheduling and business needs, while contributing to a safe, inclusive, and engaging team dynamic
  • voluntarily traveling to stores in the market to work shifts as needed by the business
What we offer
What we offer
  • dental
  • vision
  • wellness resources
  • employee discounts
  • access to certain voluntary benefits
  • other programs
  • Parttime
Read More
Arrow Right
New

Assistant General Manager

Assistant General Manager, at Boston Pizza, one of Canada’s Best Managed Compani...
Location
Location
Canada , Lac La Biche
Salary
Salary:
22.00 - 30.00 CAD / Hour
bostonpizza.com Logo
Boston Pizza
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 1+ year of casual dining experience
  • Previous leadership or supervisory experience is an asset
  • A positive attitude and strong work ethic
  • Excellent communication and team-building skills
  • Ability to thrive in a fast-paced environment
  • A passion for hospitality and guest service
  • Open availability
Job Responsibility
Job Responsibility
  • Support day-to-day operations
  • Lead and motivate the team
  • Ensure an exceptional guest experience
What we offer
What we offer
  • Competitive pay
  • Medical
  • dental benefits
  • Staff accommodations available
  • Flexible scheduling
  • Room to grow within the company
  • Hands-on management training
  • A supportive, close-knit team environment
  • Fulltime
Read More
Arrow Right
New

Territory Manager Upper Body VIC/ACT

Location
Location
Australia , Mount Waverley
Salary
Salary:
Not provided
karlstorz.com Logo
KARL STORZ
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • a Bachelor’s degree in nursing, science, medicine, business or a related discipline highly desirable
  • minimum 5 years sales experience in medical devices and instrumentation highly desirable
  • the ability to understand and impart technical knowledge across a broad portfolio of products
  • the ability to both acquire and develop new business opportunities
  • a strong commitment to sell the Company’s products and achieve company objectives is essential
  • committed to working professionally and ethically at all times
  • proactive self-management in owning your business and driving results
  • demonstrated ability in planning and execution of sales and territory plans
Job Responsibility
Job Responsibility
  • selling and promoting a range of devices and consumables to hospitals within a defined territory
  • prepare sales and territory plans to identify specific commercial opportunities
  • build excellent customer relationships, understand and impart product knowledge and detailed technical information
  • meet customer and territory KPIs
  • maintain a strong customer-centric focus, following through on customer commitments and requests within agreed timeframes
  • conduct regular territory reviews with sales management in conjunction with the Sales Manager
  • ensure the Company’s key products and marketing strategies are effectively implemented in the sales territory
  • follow up on all sales leads and referrals in a timely manner
What we offer
What we offer
  • Leave Benefits (Annual Leave, Sick Leave, Parental Leave, etc.)
  • Transport Allowance (if applicable to role)
  • Onsite Parking
  • Accessibility to Public Transport
  • Flexible Work Arrangements
  • Wellness Programs and Activities
  • Professional Development Opportunities
  • Global Exposure & Business Travel Opportunities (if applicable to role)
  • All other statutory benefits
  • Fulltime
Read More
Arrow Right
New

Pharmacy Technician

We’re building a world of health around every individual — shaping a more connec...
Location
Location
United States , Fort Worth
Salary
Salary:
16.50 - 25.00 USD / Hour
https://www.cvshealth.com/ Logo
CVS Health
Expiration Date
July 11, 2026
Flip Icon
Requirements
Requirements
  • Must comply with any state board of pharmacy requirements or laws governing the practice of pharmacy, which includes but is not limited to, age, education, and licensure/certification
  • If the state board of pharmacy does not address or mandate a minimum age requirement, must be at least 16 years of age
  • If the state board of pharmacy does not address or mandate a minimum educational requirement, must have a high school diploma or equivalent, or be actively enrolled in high school or high school equivalency program
  • State-level licensure and national certification requirements vary by state
Job Responsibility
Job Responsibility
  • Living our purpose by following all company SOPs at each workstation to help our Pharmacists manage and improve patient health
  • Following pharmacy workflow procedures at each pharmacy workstation (i.e., production, pick-up, drive-thru, and drop-off) for safe and accurate prescription fulfillment
  • Contributing to positive patient experiences by showing empathy and genuine care: creating heartfelt and personalized moments while serving patients at pick-up, drive-thru, and over the phone
  • keeping patients healthy by offering immunizations and other services at the register and over the phone
  • and demonstrating compassionate care by solving or escalating patient problems
  • Completing basic inventory activities, as permitted by law, and as directed by the pharmacy leadership team, such as accurately putting away medication deliveries and completing cycle counts, returns-to-stocks, waiting bin inventories, etc.
  • Contributing to a high-performing team, embracing a growth mindset, and being receptive to feedback
  • actively seeking opportunities to expand clinical and technical knowledge needed to better assist patients
  • Remaining flexible for both scheduling and business needs, while contributing to a safe, inclusive, and engaging team dynamic
  • voluntarily traveling to stores in the market to work shifts as needed by the business
What we offer
What we offer
  • dental
  • vision
  • wellness resources
  • employee discounts
  • access to certain voluntary benefits
  • Parttime
Read More
Arrow Right
New

Senior Software Engineer II, Kora Compute

We’re not just building better tech. We’re rewriting how data moves and what the...
Location
Location
Canada , Ontario
Salary
Salary:
179200.00 - 210600.00 CAD / Year
confluent.io Logo
Confluent
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • BS, MS, or PhD in computer science or a related field, or equivalent work experience
  • 4+ years of relevant cloud infrastructure/cloud networking experience
  • Strong fundamentals in distributed systems design and development
  • Experience building and operating large-scale systems in the Cloud
  • Solid understanding of basic systems operations (disk, network, operating systems, etc)
  • A self starter with the ability to work effectively in teams
  • Proficiency in Java, Scala, C/C++, Go or other statically typed languages
Job Responsibility
Job Responsibility
  • Driven and excited about challenges of delivering complex projects in production with a focus on quality
  • Customer focused - making customers more successful by taking on their most challenging problems motivates you
  • Have a strong sense of teamwork and able to make decisions which benefit the team and company
  • Identify root causes, and get beyond treating symptoms - motivated to dig deep and solve hard problems
What we offer
What we offer
  • Remote-First Work
  • Robust Insurance Benefits
  • Flexible Time Away
  • The Best Teammates
  • Experience Ambassadors
  • Open and Honest Culture
  • Well-Being and Growth
  • Fulltime
Read More
Arrow Right