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Senior Full Stack Engineer

Job Overview

Location

Barcelona

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

February 17, 2026

Full Job Description

đź“‹ Description

  • • Join Collectly Inc., a rapidly growing Y Combinator alumni company, as a Senior Full Stack Engineer in our vibrant Barcelona office. We are on a mission to revolutionize the healthcare industry by empowering organizations to dedicate more time to patient care and less to administrative burdens. Our innovative platform provides financial transparency for patients and a seamless, modern experience from the moment they check in to receiving their bill. With a recent $29 million funding round from Sapphire Ventures, we are poised for significant expansion, enhancing our product and accelerating growth from a strong financial foundation, serving hundreds of satisfied clients.
  • • As a Senior Full Stack Engineer, you will play a pivotal role in shaping the future of our product. You will be instrumental in designing, developing, and deploying robust, scalable, and user-friendly features that directly impact our clients' ability to streamline their operations and improve patient satisfaction. This is an opportunity to work with a talented and passionate team, contribute to a meaningful mission, and grow your career in a dynamic and supportive environment.
  • • You will be responsible for the end-to-end development lifecycle, from conceptualization and design to implementation, testing, and deployment. This includes architecting new features, optimizing existing systems, and ensuring the overall health and performance of our platform. You'll collaborate closely with product managers, designers, and other engineers to translate business requirements into elegant technical solutions.
  • • Dive deep into our technology stack, which includes React for the frontend, Node.js for the backend, and PostgreSQL for our database. You'll have the opportunity to work across the full stack, tackling complex challenges and contributing to both user-facing applications and critical backend services. Your expertise will be crucial in maintaining high code quality, implementing best practices, and driving technical innovation.
  • • Key responsibilities will involve developing new features that enhance our patient billing and communication workflows, improving the efficiency of our administrative tools for healthcare providers, and ensuring the security and reliability of our platform. You will also be involved in code reviews, mentoring junior engineers, and contributing to architectural decisions that will shape the long-term direction of our technology.
  • • We are looking for an engineer who is not only technically proficient but also a proactive problem-solver and a strong communicator. You should be comfortable working in an agile environment, adapting to changing priorities, and taking ownership of your work. Your contributions will directly influence the success of our clients and the overall growth of Collectly Inc.
  • • This role offers a unique chance to make a significant impact. You will be at the forefront of developing solutions that address real-world problems in healthcare administration, making a tangible difference in the lives of both providers and patients. We encourage a culture of continuous learning and improvement, providing opportunities for professional development and exposure to cutting-edge technologies.
  • • Collaborate with cross-functional teams to define, design, and ship new features, ensuring they are scalable, maintainable, and meet high-quality standards.
  • • Write clean, efficient, and well-documented code across the full stack, adhering to best practices and coding standards.
  • • Troubleshoot, debug, and upgrade existing systems, identifying and resolving performance bottlenecks and technical debt.
  • • Participate in code reviews, providing constructive feedback to peers and ensuring code quality and consistency.
  • • Contribute to architectural discussions and decisions, helping to shape the technical roadmap of the product.
  • • Mentor and guide junior engineers, fostering a collaborative and knowledge-sharing environment.
  • • Stay up-to-date with emerging technologies and industry trends, bringing new ideas and approaches to the team.
  • • Ensure the security, performance, and scalability of our applications and infrastructure.
  • • Work closely with product management to understand user needs and translate them into technical requirements and solutions.
  • • Develop and maintain automated tests to ensure the reliability and stability of our software.
  • • Contribute to the continuous improvement of our development processes and tools.
  • • Be a champion for best practices in software development, including CI/CD, testing, and monitoring.
  • • Drive technical excellence and innovation within the engineering team, encouraging a culture of learning and experimentation.
  • • You will be a key player in building a product that is transforming healthcare administration, making it more efficient, transparent, and patient-centric. Your work will directly contribute to our mission of enabling healthcare providers to focus on what matters most: patient care.

Skills & Technologies

Full Stack
Senior
Onsite

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About Collectly Inc.

Collectly Inc. empowers healthcare leaders with AI-powered Revenue Cycle Management and patient engagement solutions. The company specializes in automating the entire patient financial experience through intelligent AI agents, streamlining everything from eligibility and benefits verification to digital check-ins, in-person payments, and post-service billing. Their flagship AI voice agent for patient billing helps medical groups, health systems, and RCM companies demystify the billing process, improve cash flow, and significantly reduce operational costs. Serving over 3,000 facilities, Collectly is proven to accelerate patient payments, enabling collections in just a week or two compared to the industry average of 60-90 days, leading to a substantial increase in patient payment rates for their clients.

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