We’re Hiring: Senior Full-Stack Developer (React + Python)
Project: Climatise
Location: Remote (Eastern European time zone preferred)
Type: Full-Time
Experience Level: Middle—Senior
English Level: Upper-Intermediate or higher

About the Role

Osambit is looking for a Senior Full-Stack Developer to join the Climatise project — a modern SaaS platform that helps organizations measure, manage, and report their carbon emissions. The platform automates carbon accounting, sustainability reporting, supplier engagement, and emissions analysis, enabling businesses to comply with regulatory frameworks while reducing manual effort.

You’ll work across both frontend and backend, developing cloud-native services, scalable APIs, and intuitive user interfaces while collaborating closely with product owners, designers, and fellow engineers.

What You’ll Do

• Develop backend services using Python and FastAPI
• Build modern frontend applications using React and JavaScript/TypeScript
• Design and implement GraphQL APIs
• Develop and optimize database schemas and queries
• Build cloud-native applications on AWS
• Participate in infrastructure provisioning and deployment automation
• Monitor application health, troubleshoot production issues, and improve system reliability
• Write clean, maintainable, and well-tested code
• Participate in code reviews, sprint planning, and technical discussions
• Collaborate with cross-functional teams to deliver new product features

Requirements

• 5+ years of professional software development experience
• Experience with Python and FastAPI
• Experience with React and JavaScript/TypeScript
• Experience designing and consuming GraphQL APIs
• Experience with PostgreSQL and/or MySQL
• Experience with AWS, including services such as:
  
  • Lambda
  • DynamoDB
  • S3
  • AppSync
  • CloudWatch
• Good understanding of cloud-native application architecture
• Experience working with logging, monitoring, and observability tools
• Understanding of REST APIs, authentication, and modern web application architecture
• Experience with Git and collaborative development workflows
• Upper-Intermediate English or higher

Nice to Have

• Experience with Terraform or other Infrastructure-as-Code tools
• Experience with Docker
• Experience with CI/CD pipelines (GitHub Actions, GitLab CI, AWS CodePipeline, etc.)
• Familiarity with serverless architectures
• Experience with messaging technologies (SQS, SNS, Kafka, RabbitMQ)
• Knowledge of caching technologies such as Redis
• Experience building SaaS or enterprise platforms
• Interest in sustainability, ESG, or climate technology

What We Offer

• Fully remote work with flexible hours
• Opportunity to contribute to an innovative sustainability platform
• Modern technology stack and cloud-native architecture
• Professional and supportive engineering team
• Long-term collaboration opportunities
• Competitive compensation