Application Guide

How to Apply for Full Stack Software Engineer (Piq Energy / Remote & Hybrid / US

at Active Impact Investments

🏢 About Active Impact Investments

Active Impact Investments is a climate-tech venture capital firm that backs early-stage startups driving profitable environmental sustainability. Working here means you'll be part of a mission-driven team that combines venture capital with hands-on support for portfolio companies like Piq Energy, which focuses on clean energy solutions.

About This Role

As a Full Stack Software Engineer at Piq Energy, you'll own end-to-end feature development across the entire stack—from backend APIs and data pipelines to AI agents and interactive frontends. Your work will directly impact the scalability and user experience of a climate-tech product, enabling smarter energy management and sustainability outcomes.

💡 A Day in the Life

Your day might start with a stand-up with the product team to discuss user feedback from the previous day, then dive into coding a new API endpoint for energy data ingestion. After lunch, you'd collaborate with a customer success manager to debug a frontend issue, and later pair with an AI engineer to optimize a model's data pipeline—all while using Cursor to accelerate development.

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Interview Prep

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🎯 Who Active Impact Investments Is Looking For

  • Has 6+ years of professional software engineering experience, with a track record of delivering high-quality, production-grade software end-to-end.
  • Deeply experienced in either building data-intensive backend systems (Python or similar) OR developing interactive, data-rich frontend applications (modern JS frameworks). Full-stack proficiency is a plus.
  • Comfortable using LLM coding tools like Cursor and Claude Code to accelerate development and improve code quality.
  • Thrives in a fast-paced startup environment, can lead workstreams from requirements to rollout, and enjoys direct collaboration with users and customer-facing teams.

📝 Tips for Applying to Active Impact Investments

1

1. In your resume and cover letter, highlight specific examples of end-to-end ownership: projects where you gathered requirements, designed architecture, implemented, and coordinated rollout.

2

2. Showcase your experience with data-intensive systems (e.g., handling large datasets, building APIs, optimizing data pipelines) or data-rich frontends (e.g., interactive dashboards, real-time visualizations).

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3. Mention your proficiency with LLM coding tools like Cursor or Claude Code—give concrete examples of how you've used them to boost productivity or solve complex problems.

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4. Tailor your application to climate tech: connect your previous work or personal projects to sustainability, energy, or environmental impact, even if indirectly.

5

5. Since the role is at a portfolio company of Active Impact Investments, research Piq Energy's product and mention how your skills align with their specific tech stack or challenges.

✉️ What to Emphasize in Your Cover Letter

['Emphasize your ability to lead end-to-end feature development, from concept to deployment, with concrete examples.', "Highlight your experience with both backend and frontend technologies, especially Python and modern JS frameworks, and how you've built data-intensive or data-rich applications.", 'Express enthusiasm for climate tech and how your work can contribute to environmental sustainability.', 'Demonstrate comfort with AI-assisted coding tools (Cursor, Claude Code) and a willingness to adopt new technologies to improve efficiency.']

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → 1. Explore Piq Energy's product and website to understand their energy management solutions and target customers.
  • → 2. Read about Active Impact Investments' portfolio and their investment thesis in climate tech to understand the company's mission and culture.
  • → 3. Look into the latest trends in climate tech, especially software for energy efficiency, renewable energy integration, or smart grids.
  • → 4. Familiarize yourself with common data-intensive backend patterns (e.g., event-driven architectures, data pipelines) and frontend frameworks (e.g., React, D3) that might be relevant.

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 1. Walk me through a recent project where you owned the full stack—from requirements gathering to deployment. How did you handle dependencies and trade-offs?
2 2. Describe a time you had to scale a backend API or data pipeline. What bottlenecks did you encounter and how did you address them?
3 3. How have you used LLM coding tools like Cursor or Claude Code in your workflow? Give a specific example where they made a difference.
4 4. Tell me about a situation where you collaborated directly with users or customer-facing teams to gather feedback and translate it into technical solutions.
5 5. How do you approach paying down technical debt while delivering new features? Describe a time you balanced both.
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⚠️ Common Mistakes to Avoid

  • 1. Using a generic cover letter that doesn't reference Piq Energy or climate tech—show that you've done your homework.
  • 2. Overemphasizing frontend or backend exclusively without demonstrating the full-stack ownership the role requires.
  • 3. Ignoring the requirement for LLM coding tools—if you have experience, showcase it; if not, show willingness to learn quickly.

📅 Application Timeline

This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.

Typical hiring timeline:

1

Application Review

1-2 weeks

2

Initial Screening

Phone call or written assessment

3

Interviews

1-2 rounds, usually virtual

✓

Offer

Congratulations!

Ready to Apply?

Good luck with your application to Active Impact Investments!

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