Tech Lead overseeing the migration of legacy systems to Python for a clean energy firm. Leading architectural decisions and mentoring technical teams in a transformative role.
Responsibilities
Define and implement architectural patterns (DDD, hexagonal architecture, clean architecture)
Conduct thorough code reviews, ensuring quality and spreading knowledge
Make strategic architectural decisions for new services, integrations, and refactorings
Technically lead the migration of legacy Node.js systems to Python
Mentor engineers on coding practices, design patterns, and architecture
Participate in strategic discussions with the CTO about the technical roadmap, tech debt, and hiring
Establish development processes (code review, deployments, documentation, testing)
Architect and develop complex backend services in Python
Solve difficult technical problems that the team cannot resolve on its own
Implement critical features or those that serve as architectural references for the team
Build and integrate APIs with external services (banks, energy distributors, ERPs)
Work with AWS: Lambda, API Gateway, SQS, SNS, Kinesis, S3, DynamoDB
Requirements
5+ years of professional experience in backend development
Proven experience leading architectural decisions in real projects (not just theoretical studies)
DDD and hexagonal architecture: deep, hands-on knowledge — you must be able to teach these concepts
Legacy system refactoring: track record of successful migrations/refactorings
Advanced Python: OOP, design patterns, type hints, async/await
AWS serverless: Lambda, API Gateway, SQS, SNS, Kinesis, S3, DynamoDB
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