How to apply for Senior Fullstack Software Engineer

About Reunion

Reunion is uniquely positioned at the intersection of technology and climate action, operating a tax credit marketplace specifically for clean energy investments. Unlike generic fintech companies, they're directly accelerating renewable energy adoption through their platform. Working here means contributing to tangible climate solutions while building innovative financial technology.

About the role

This Senior Fullstack Engineer role involves architecting both backend AWS services and frontend Next.js/React components while developing specialized data scrapers for compliance databases. You'll directly impact clean energy financing by automating audit processes with AI agents and building the core marketplace infrastructure that connects investors with renewable energy projects.

A typical day

You might start by reviewing data from compliance database scrapers, then collaborate with the product team on new marketplace features using Next.js and TypeScript. Afternoons could involve architecting AWS services for new functionality or refining AI agents for audit automation, with regular team syncs to advocate for engineering priorities.

Who Reunion is looking for

• Has 5+ years building fullstack applications with specific expertise in AWS (CloudFormation, Lambda, RDS), Serverless Framework, TypeScript, React, and Next.js
• Demonstrates experience with infrastructure-as-code and CI/CD pipelines in production environments
• Shows enthusiasm for climate tech and can articulate how their technical skills apply to renewable energy finance
• Has built data scraping systems or automation tools, with bonus points for AI/ML integration experience

Tips for this application

• Highlight specific AWS services you've used (CloudFormation, Lambda, RDS) rather than just listing 'AWS experience'
• Include examples of data scraping or automation projects, especially if related to compliance or financial data
• Mention any climate/clean energy projects or interests to show alignment with Reunion's mission
• Detail your experience with Serverless Framework specifically, not just serverless concepts generally
• Show how you've advocated for engineering roadmap items or contributed to engineering culture in past roles

What to cover in your cover letter

['Your experience with the specific tech stack (AWS services, Serverless Framework, Next.js, TypeScript)', 'Examples of building data scrapers or automation systems, especially for compliance/financial data', "Why you're passionate about applying your engineering skills to climate tech and clean energy finance", "How you've collaborated with cross-functional teams on complex software solutions"]

Research before applying

• How tax credit marketplaces work and their role in clean energy financing
• Reunion's specific approach to connecting investors with renewable energy projects
• Compliance requirements for energy tax credits (IRS Form 3468, investment tax credits)
• The competitive landscape of climate fintech companies

Likely interview topics

Based on the job description, expect questions about:

• Architecting a data scraper for compliance databases with error handling and scalability considerations
• Implementing AI agents for audit process automation - technical approach and challenges
• AWS service selection and infrastructure-as-code implementation for a tax credit marketplace
• Next.js/React performance optimization for financial data visualization
• Balancing feature development with engineering-specific roadmap advocacy in a startup environment

Common mistakes to avoid

• Generic resume listing 'AWS' without specifying services like CloudFormation, Lambda, or RDS
• No examples of infrastructure-as-code or CI/CD pipeline implementation
• Failing to connect technical experience to climate/clean energy impact in application materials