About Climatiq We are a fast-growing climate tech startup on a mission to drive climate action through data and insight. Our team consists of entrepreneurs, technologists, and scientists who have come from backgrounds such as Google, MIT, and other leading companies and academic institutions. Together, we are building a tech platform that empowers organizations to take action in tackling the climate crisis. Our powerful carbon calculation engine helps businesses embed emission metrics into any software they already use to accurately calculate and continuously monitor their carbon footprint and drive better decisions. Our platform is used by tens of thousands of sustainability leaders worldwide, and we are proud to be backed by renowned international VCs and investors in the climate-tech and software sector. We are also a certified B Corp, highlighting our commitment to balancing purpose and profit. As a remote-first company, our team is spread out across Berlin and other parts of Europe, with a strong focus on collaboration and innovation. This is an exciting time to join Climatiq. Be part of real, technology-driven endeavor from the beginning. Work with an amazing team and help build something meaningful together with our community. Job Description We are looking for a Senior Software Engineer with prior experience in API development and a drive to work on technology that supports impactful climate solutions. You’ll collaborate with a team of developers, scientists, and climate experts to expand our data platform and enhance our custom Emission Factor Query and Calculation Engine, built in Rust. You will also help design and build new functionalities for our API and applications. We are looking for self driven engineers who bring fresh ideas and are able to develop a product autonomously in a collaborative environment. Responsibilities:

Design, develop, and maintain scalable, high-performance APIs that power the infrastructure for carbon intelligence globally and across industries for all business activities and products.
Play a key role delivering key data and insights into leading software platforms used by the largest enterprises across the world, powering billions of calculations in critical environments via our API, enhancing carbon visibility and climate action for organizations.
Collaborate with your peers in code reviews and knowledge-sharing to strengthen team expertise and development standards.
Work closely with Product and Engineering to align on priorities, set deliverables, and ensure impactful outcomes.

Required Qualifications

5+ years of experience building external facing REST APIs as Software as a Service.
Experience using Rust in production or side projects with significant scope.
Experience using TypeScript in production, for backend and frontend applications.
Self-driven and comfortable working autonomously, with excellent problem-solving skills.
Strong written and verbal communication skills, with experience collaborating across remote teams, ensuring clear, effective, and aligned outcomes.

Preferred qualifications:

3+ years using TypeScript in production, for backend and frontend applications.
Experience or strong interest in Next.js for building high-quality web applications.
Familiarity with Python or Machine Learning is a plus.
Experience with managing AWS infrastructure is a plus.
Prior experience with FaunaDB or PostgreSQL is a plus, especially in a production environment.
Bachelor's degree in Computer Science, a related technical field, or equivalent practical experience

Additional Information

Location: Berlin or Remote within +/- 2 hours of CET timezone
Starting date: As soon as possible
Hours: Full-time, flexible working hours
Compensation: Competitive salary and benefits, including employee stock options, learning and development stipend, regular team offsites, and more

As a certified B Corp, Climatiq is an equal-opportunity employer and we welcome and encourage candidates from all backgrounds and experiences to apply for roles on our team. Send us your CV and a short cover letter, highlighting your skills and experience, relevant for the advertised role.

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Senior Full Stack Engineer – Climate Tech – Rust & TypeScript // Climatiq