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Senior Full Stack Developer (TypeScript)

Job Overview

Location

Berlin

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

March 3, 2026

Full Job Description

đź“‹ Description

  • • As a Senior Full Stack Developer at Cosuno GmbH, you will be an integral part of our dynamic Engineering team, taking on the critical responsibility of developing and enhancing our innovative construction technology platform. This role offers a unique opportunity to contribute significantly to a product that is actively used by thousands of construction professionals, directly impacting the way the world is built. You will not merely be a coder, but a problem-solver, a feature owner, and a key contributor to the technical evolution of our core offering.
  • • Your responsibilities will span the entire software development lifecycle, from conceptualization and design through to implementation, testing, and deployment. You will be instrumental in translating complex business requirements into robust, scalable, and maintainable software solutions. A significant aspect of your role will involve taking full ownership of features, ensuring their successful delivery and ongoing performance.
  • • In your initial months, you can expect to dive into exciting projects such as designing and building cutting-edge AI features. This could include developing our recently launched AI agent for editing Bills of Quantities (BoQs) or creating sophisticated AI algorithms for automated bidder recommendations. These initiatives are at the forefront of our product's innovation and will require your deep technical expertise.
  • • You will collaborate closely with Product Managers and Designers to meticulously shape the user experience and define the technical roadmap of our core product. This cross-functional collaboration is vital for ensuring that our technical solutions align perfectly with user needs and business objectives, fostering a cohesive and impactful product development process.
  • • A key technical challenge will be to architect and implement modular packages and services within our monorepo. This effort is crucial for enhancing the overall structure, scalability, and maintainability of our codebase, ensuring that Cosuno's platform can grow and adapt efficiently.
  • • Our engineering culture is built on principles of calm, collaboration, and productivity. We foster an environment where engineers are trusted and empowered with the autonomy to excel. Our development practices are agile and fast-paced, utilizing trunk-based development with daily releases to ensure rapid delivery of value to our users.
  • • Quality is paramount. We maintain a comprehensive Cypress End-to-End (E2E) test suite and enforce strict typing, linting, and formatting rules to guarantee a clean, robust, and maintainable codebase. This commitment to quality ensures the reliability and stability of our platform.
  • • We embrace a DevOps mindset, with a well-oiled CI/CD pipeline that deploys to AWS via Kubernetes. Our entire infrastructure is managed as code using Terraform, promoting efficiency, consistency, and rapid deployment capabilities.
  • • Collaboration and transparency are core values. We encourage open discussions, value constructive code reviews, and cultivate a culture where the best ideas are embraced, irrespective of their origin. This inclusive approach ensures continuous improvement and innovation.
  • • As a Senior Full Stack Developer, you will be a mentor and a technical leader, guiding junior developers and contributing to the overall technical excellence of the team. Your experience will be invaluable in tackling complex architectural challenges and driving best practices across the engineering department.
  • • You will play a pivotal role in ensuring the scalability and performance of our platform as we continue to grow and serve an increasing number of construction professionals. Your contributions will directly influence the efficiency and success of our clients in the construction industry.
  • • This role demands a proactive approach, a passion for building exceptional products, and a desire to make a tangible impact in a rapidly evolving industry. You will be at the intersection of technology and a traditional sector, driving digital transformation through innovative software solutions.

Skills & Technologies

JavaScript
TypeScript
React
Node.js
AWS
Full Stack
Senior
Remote

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About Cosuno GmbH

Cosuno is a leading digital platform revolutionizing the real estate industry by connecting real estate agents with qualified buyers. The company streamlines the sales process, offering a comprehensive solution for lead generation, qualification, and management. Cosuno's technology empowers agents to focus on closing deals rather than spending excessive time on administrative tasks. By leveraging data and automation, Cosuno aims to increase efficiency and transparency in real estate transactions, making the buying and selling process smoother and more effective for all parties involved. They operate within the PropTech sector, driving innovation in how real estate is bought and sold.

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