Senior Software Engineer (Python and GCP)

The company and our mission: 
Zartis is a digital solutions provider working across technology strategy, software engineering and product development.
We partner with firms across financial services, MedTech, media, logistics technology, renewable energy, EdTech, e-commerce, and more. Our engineering hubs in EMEA and LATAM are full of talented professionals delivering business success and digital improvement across application development, software architecture, CI/CD, business intelligence, QA automation, and new technology integrations.
We are looking for a Senior Software Engineer (Python & GCP) to work on a project in the home energy optimization industry. 
The project:
Our teammates are talented people that come from a variety of backgrounds. We’re committed to building an inclusive culture based on trust and innovation.
You will be part of a distributed team developing new technologies to solve real business problems.
Our client is a climate-tech startup on a mission to make rooftop solar more effective and affordable. They've developed a platform that uses real-time data and machine learning to optimize home energy storage—helping reduce carbon emissions, lower energy costs, and increase accessibility to solar energy for more households.
What you will do:
- Developing and maintaining scalable backend services using Python on Google Cloud Platform.- Contributing to the data infrastructure, working with tools such as Firebase, BigQuery, Cloud SQL, and Cloud Run.- Managing and enhancing Terraform-based infrastructure and CI/CD pipelines via GitHub Actions.- Handling sensitive energy usage data with a strong emphasis on privacy, security, and GDPR compliance.- Taking technical ownership of a core area (e.g., device connectivity or the simulation engine).- Collaborating closely with product and engineering teams to ship quickly, learn continuously, and iterate frequently.- Helping to shape engineering practices as the company scales — they currently follow a Kanban model and foster a culture of high trust, high ownership, and low ego.
What you will bring:
- At least 4 years of experience in a backend or full-stack engineering role.- Strong Python proficiency, and experience with cloud-based infrastructure (GCP preferred).- Solid experience working with and optimizing relational databases.- Familiarity with infrastructure-as-code (e.g., Terraform), CI/CD pipelines (GitHub Actions), and containerized deployments (Cloud Run, Docker).- A security-conscious mindset, especially when working with personal or high-value data.- A pragmatic engineering approach — you know when to move fast and when to invest in long-term scalability and resilience.- Excellent communication skills and a collaborative, low-ego attitude — you enjoy working in small, mission-driven teams.- A clear motivation for climate impact and a desire to build real-world solutions that matter.
Nice to have:
- Experience working in early-stage startups or small, cross-functional teams.- Familiarity with data engineering, time-series data, or IoT systems.- Interest in renewable energy, home energy systems, or hardware integration.- Open-source contributions or side projects that reflect your technical thinking and creativity.
What we offer:
- 100% Remote Work.- WFH allowance: Monthly payment as financial support for remote working.- Career Growth: We have established a career development program accessible for all employees with a 360º feedback that will help us to guide you in your career progression.- Training: For Tech training at Zartis, you have time allocated during the week at your disposal. You can request from a variety of options, such as online courses (from Pluralsight and Educative.io, for example), English classes, books, conferences, and events.- Mentoring Program: You can become a mentor in Zartis or you can receive mentorship, or both.- Zartis Wellbeing Hub (Kara Connect): A platform that provides sessions with a range of specialists, including mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars with such professionals as well.- Flexible Working schedule. - Multicultural working environment: We organize tech events, webinars, parties, and activities to do online team-building games and contests.