Application Guide

How to Apply for Senior Software Developer (Back-end)

at ONYX Insight

🏢 About ONYX Insight

ONYX Insight is at the forefront of renewable energy innovation, using predictive analytics to optimize wind turbine performance globally. Their mission to reduce downtime and boost energy production makes them a key player in the fight against climate change, offering a chance to work on impactful, cutting-edge technology in a remote-first environment.

About This Role

As a Senior Software Developer on a contract basis, you'll own the back-end development of high-performance applications using C# .NET, while also supporting frontend integration with React. Your work directly contributes to reliable, scalable systems that process vast amounts of sensor data, enabling smarter wind farm operations.

💡 A Day in the Life

Start your day with a stand-up meeting to sync with the agile team, then dive into coding a new C# .NET microservice for processing turbine data. After lunch, you might review a pull request for a React component that visualizes performance metrics, then collaborate with DevOps to tweak the CI/CD pipeline for smoother deployments.

🚀 Application Tools

Generate Cover Letter

AI-powered, tailored for ONYX Insight

Interview Prep

Practice questions for this role

🎯 Who ONYX Insight Is Looking For

  • A seasoned C# .NET developer with 5+ years of commercial experience, comfortable owning end-to-end feature development in an agile team.
  • Proficient in React with at least 2 years of hands-on experience, able to bridge back-end and front-end seamlessly.
  • Experienced with AWS cloud services and PostgreSQL, understanding how to build scalable, performant web applications.
  • Self-motivated and thrives with minimal oversight, capable of contributing to CI/CD pipelines and ensuring reliable releases.

📝 Tips for Applying to ONYX Insight

1

Highlight specific projects where you owned back-end development in C# .NET, especially those involving large-scale data processing or real-time analytics.

2

Demonstrate your React experience by mentioning component libraries or state management tools you've used (e.g., Redux, MobX).

3

Tailor your resume to emphasize experience with AWS (e.g., EC2, S3, Lambda) and PostgreSQL, as these are explicitly preferred.

4

Include examples of your work in agile environments, such as sprint planning, code reviews, or CI/CD pipeline contributions.

5

Since it's a contract role, be clear about your availability and willingness to work remotely in a timezone that overlaps with the team.

✉️ What to Emphasize in Your Cover Letter

['Showcase your deep C# .NET expertise and ability to deliver high-performance back-end services with minimal supervision.', 'Explain how your React skills complement your back-end work, ensuring smooth frontend-backend integration.', 'Express enthusiasm for renewable energy and how your skills can help ONYX Insight optimize wind energy production.', 'Mention your experience with cloud (AWS) and databases (PostgreSQL) to align with their tech stack.']

Generate Cover Letter →

🔍 Research Before Applying

To stand out, make sure you've researched:

  • → Understand ONYX Insight's predictive analytics platform, especially how they use sensor data to forecast turbine failures.
  • → Read up on their case studies or white papers about wind farm optimization to speak knowledgeably about their impact.
  • → Familiarize yourself with their tech stack: AWS services, PostgreSQL, and any open-source tools they might use.
  • → Check their blog or news section for recent product launches or partnerships to show you're up-to-date.

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Design a scalable API endpoint in C# .NET to handle real-time turbine sensor data.
2 How would you optimize a slow PostgreSQL query for a dashboard that displays historical wind farm data?
3 Describe a time you contributed to a CI/CD pipeline. What tools did you use and what challenges did you face?
4 How do you approach integrating a React frontend with a .NET backend? What are common pitfalls?
5 Given ONYX Insight's predictive analytics focus, how would you architect a service to process and store time-series data efficiently?
Practice Interview Questions →

⚠️ Common Mistakes to Avoid

  • Don't focus solely on back-end without acknowledging React; this role requires cross-functional support.
  • Avoid vague claims about cloud experience—be specific about AWS services you've used.
  • Don't ignore the contract nature; be upfront about your availability and commitment to the project duration.

📅 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 ONYX Insight!

← Back to Job Listing Apply Now →