Platform & Security Engineer

Cosuno

YOUR MISSION As a member of our Data team, you'll take full ownership of the systems that turn raw data into decisions—for our product, our internal teams, our customers, and our investors. You won't just maintain dashboards; you'll own the pipeline end to end, from ingestion to the numbers people actually act on. In your first few months, you might: * Take ownership of our dbt pipeline, improving our data models so they're reliable, well-tested, and easy to build on. * Maintain and extend our Looker setup, and ship new dashboards and reports that customers and other stakeholders depend on. * Strengthen our data pipeline from Postgres to BigQuery, and build custom Python scripts to automate the flows that keep our warehouse fresh. * Integrate our data warehouse with external tools like Salesforce or ActiveCampaign, so the right data reaches the teams that need it. HOW WE BUILD: OUR ENGINEERING CULTURE We believe in a calm, collaborative, and productive engineering environment. We trust our people and give them the autonomy to do their best work. Our approach includes: * Ownership Over Handoffs: On a small data team, you own your work from ingestion to dashboard. We trust you to make decisions and run with them. * Quality by Default: We treat our data models like production code—tested, version-controlled, and documented—so the numbers we serve are ones we can stand behind. * DevOps Mindset: We automate the boring parts. Pipelines, syncs, and checks are powered by third-party tools or GitHub Actions so the team can focus on the work that needs a human. * Collaboration & Transparency: We value open discussion, constructive reviews, and a culture where the best idea wins, regardless of who it comes from. * AI-Native by Default: We work heavily with Claude Code and other AI tools, and they're a core part of how we build—from writing models and scripts to debugging pipelines and exploring data. We expect everyone on the team to use them fluently and keep getting better at it. YOUR PROFILE We're looking for an experienced data practitioner who likes owning the full stack of an analytics platform. You'll be a great fit if you have: * Significant professional experience building and maintaining data models with dbt and writing advanced SQL. * Solid Python skills for data syncing, automation, and general scripting. * Hands-on experience with a cloud data warehouse such as BigQuery, and comfort working with source databases like Postgres. * Experience building dashboards and serving data to non-technical stakeholders (a strong command of Looker is a big plus). * Strong, hands-on familiarity with AI coding tools—especially Claude Code—and a habit of using them as part of your daily workflow. * A pragmatic approach to problem-solving and a high sense of ownership, feeling comfortable driving projects independently. * Excellent communication skills in English. BONUS POINTS FOR (NICE-TO-HAVES): * Experience with reverse ETL or integrating a data warehouse with tools like ActiveCampaign or Salesforce. * Experience building and maintaining CI/CD or automation pipelines (e.g. GitHub Actions). * Experience preparing data and reporting for external audiences such as customers or investors. * An interest in data engineering best practices, pipeline reliability, and infrastructure-as-code. WHY US? * Competitive Compensation: A competitive salary above the market average. * Work-Life Balance: Choose to work 100% remotely or from our modern office in Berlin. We offer flexible working hours to fit your life. * Top-Notch Equipment: A new MacBook Pro to ensure you have the best tools for the job. * A Great Team: Regular company off-sites and team events that connect us as people, not just colleagues. * Job Security: A permanent contract in a stable, well-funded company. ABOUT US Cosuno – Revolutionizing construction through technology. We are Cosuno – a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity. Why Cosuno? Artificial intelligence is the key to our solution: it analyzes millions of price data points and helps construction companies create precise and efficient bids. This not only saves our customers time but also helps them avoid unnecessary costs. But for us, it's not just about technology – it's about the people who drive it. At Cosuno, you will work with creative minds who are reshaping the construction industry. We believe in diversity because we know that the best ideas come from different perspectives. An integrative and inclusive work environment is a matter of course for us. Join us – Build the future of construction.

Cosuno

YOUR MISSION As a key member of our Engineering team, you won't just be writing code—you'll be solving complex problems and taking full ownership of features from concept to deployment. You will have a direct impact on a product used by thousands of construction professionals to build the world around us. In your first few months, you might: * Design and build new AI features, such as our recently launched AI agent for editing BoQs or automated AI bidder recommendations * Collaborate with product managers and designers to shape the user experience and technical direction of our core product. * Architect and implement modular packages and services in our monorepo to improve the structure and maintainability of our codebase HOW WE BUILD: OUR ENGINEERING CULTURE We believe in a calm, collaborative, and productive engineering environment. We trust our engineers and give them the autonomy to do their best work. Our approach includes: * Agile & Fast-Paced: We practice trunk-based development with daily releases to get value into our users' hands quickly. * Quality by Default: We maintain a comprehensive Cypress E2E test suite and enforce strict typing, linting, and formatting rules to keep our codebase clean and maintainable. * DevOps Mindset: Our well-oiled CI/CD pipeline deploys to AWS via Kubernetes, with our entire infrastructure managed as code using Terraform. * Collaboration & Transparency: We value open discussion, constructive code reviews, and a culture where the best idea wins, regardless of who it comes from. YOUR PROFILE We're looking for an experienced engineer who is passionate about building great products. You'll be a great fit if you have: * Significant professional experience building, shipping, and maintaining complex web applications using TypeScript. * Deep expertise in Node.js for backend development and a strong command of React for the frontend. * A pragmatic approach to problem-solving and a high sense of ownership, feeling comfortable driving projects independently. * Experience working in collaborative, agile product teams. * Excellent communication skills in English. Bonus Points For (Nice-to-Haves): * Experience with our infrastructure stack (AWS, Kubernetes, Terraform). * Experience with building and maintaining CI/CD pipelines. * An interest in data engineering or machine learning. WHY US? * Competitive Compensation: A competitive salary above the market average. * Work-Life Balance: Choose to work 100% remotely or from our modern office in Berlin. We offer flexible working hours to fit your life. * Top-Notch Equipment: A new MacBook Pro to ensure you have the best tools for the job. * A Great Team: Regular company off-sites and team events that connect us as people, not just colleagues. * Job Security: A permanent contract in a stable, well-funded company. ABOUT US Cosuno – Revolutionizing construction through technology. We are Cosuno – a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity. Why Cosuno? Artificial intelligence is the key to our solution: it analyzes millions of price data points and helps construction companies create precise and efficient bids. This not only saves our customers time but also helps them avoid unnecessary costs. But for us, it's not just about technology – it's about the people who drive it. At Cosuno, you will work with creative minds who are reshaping the construction industry. We believe in diversity because we know that the best ideas come from different perspectives. An integrative and inclusive work environment is a matter of course for us. Join us – Build the future of construction.

Cosuno

YOUR MISSION In this role, you will act as a technical leader, shaping the future of our platform and mentoring the engineers around you. You'll tackle our most ambiguous and challenging technical problems, ensuring our systems are scalable, reliable, and built for the long term. Your mission might include: * Driving the technical vision and architecture for our core product, working closely with our ML team to integrate new AI features. * Leading the design and execution of large-scale technical projects, such as evolving our monorepo strategy or migrating a core service to a new architecture. * Mentoring other senior engineers, elevating the team's skills through code reviews, architectural guidance, and establishing best practices. * Partnering with product and engineering leadership to identify and de-risk technical challenges in the product roadmap for the next 1-2 years. HOW WE BUILD: OUR ENGINEERING CULTURE We believe in a calm, collaborative, and productive engineering environment. We trust our engineers and give them the autonomy to do their best work. Our approach includes: * Agile & Fast-Paced: We practice trunk-based development with daily releases to get value into our users' hands quickly. * Quality by Default: We maintain a comprehensive Cypress E2E test suite and enforce strict typing, linting, and formatting rules to keep our codebase clean and maintainable. * DevOps Mindset: Our well-oiled CI/CD pipeline deploys to AWS via Kubernetes, with our entire infrastructure managed as code using Terraform. * Collaboration & Transparency: We value open discussion, constructive code reviews, and a culture where the best idea wins, regardless of who it comes from. YOUR PROFILE We're looking for a seasoned technical leader who is passionate about building great products and great teams. You'll be a great fit if you have: * Extensive experience (typically 10+ years) in software engineering, with a proven track record of architecting and delivering complex, scalable web applications. * Deep, system-level expertise in our core technologies (TypeScript, Node.js, React) and the ability to reason about the entire stack, from the database to the browser. * A history of leading complex technical projects and making critical architectural decisions. * A passion for mentoring and technical leadership. You find joy in helping other engineers grow and in elevating the technical bar for the whole team. * Excellent communication skills in English, with the ability to articulate complex technical concepts to both technical and non-technical audiences. WHY US * Competitive Compensation: A competitive salary above the market average. * Work-Life Balance: Choose to work 100% remotely or from our modern office in Berlin. We offer flexible working hours to fit your life. * Top-Notch Equipment: A new MacBook Pro to ensure you have the best tools for the job. * A Great Team: Regular company off-sites and team events that connect us as people, not just colleagues. * Job Security: A permanent contract in a stable, well-funded company. ABOUT US Cosuno – Revolutionizing construction through technology. We are Cosuno – a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity. Why Cosuno? Artificial intelligence is the key to our solution: it analyzes millions of price data points and helps construction companies create precise and efficient bids. This not only saves our customers time but also helps them avoid unnecessary costs. But for us, it's not just about technology – it's about the people who drive it. At Cosuno, you will work with creative minds who are reshaping the construction industry. We believe in diversity because we know that the best ideas come from different perspectives. An integrative and inclusive work environment is a matter of course for us. Join us – Build the future of construction.