Senior Backend Engineer (Ruby on Rails)

Wunder; United States; Remote; USD 190,000 - 250,000; Full time

Benefits offered by this job

100% employer-paid medical, dental & 


Vision insurance

401k Matching (50% match up to 4%)

Health Savings Account (HSA) & DepCare

Job summary

Wunder in Boulder, CO seeks an experienced Senior Backend Engineer to help automate solar development, value evaluation, and loan servicing systems.

You'll work closely with the founders, product and finance teams, writing Ruby on Rails code, refining the CI/CD pipeline, and solving challenging problems at scale while advancing clean energy. This role offers impact, growth, and a fast‑moving, collaborative environment.

Qualifications

• 5+ years of backend engineering on high‑throughput systems.
• Experience with Ruby on Rails, Hotwire, PostgreSQL, and cloud services (AWS/Heroku).
• Strong belief in clean energy and scalable architecture.

Responsibilities

• Write, review, and maintain Ruby on Rails code.
• Develop and maintain CI/CD pipeline for multiple daily deployments.
• Solve complex backend problems using Rails best practices and SOA.
• Collaborate with product, finance, and solar experts.
• Shape architectural direction and explore new technologies.
• Allow deep-work blocks and non-meeting time; help team grow.

Skills

Ruby on Rails

Hotwire

PostgreSQL

Heroku

AWS

CircleCI

Backend systems

Tools

Ruby on Rails

Hotwire

PostgreSQL

Heroku

AWS

CircleCI

Job description

Wunder is building a Modern Energy Company.

We were founded with one simple vision: to address the greatest crisis of our generation by accelerating the deployment of solar energy. In doing so, we help businesses, municipalities, and schools save money by delivering clean on-site power. We convert simple warehouses into electrified industrial platforms built for the future. We enable the nation’s leading commercial and industrial real estate firms to capture the benefits of solar across their properties. We align ESG goals with revenue targets, and the renewable energy assets we’re deploying today will power America’s tomorrow.

Wunder is actively developing hundreds of commercial solar projects across the country. Our team has evaluated more than 30,000 properties for solar across all 50 states to meet our customers where they are. Our customers have a national footprint and so do we. Wunder’s proprietary technology platform enables us to develop solar at scale, across a portfolio that includes everything from self-storage facilities and schools to data centers and industrial logistics facilities. Our average solar system—about 430 kilowatts in size—can offset 350,000 pounds of coal burned each year of system operation!

The Role

At Wunder, we're building a team of high-performing, effective, and sophisticated engineers. We come from a wide range of backgrounds, but regardless of where we come from, we all agree that the most fun we've had as engineers is when we're working on challenging problems surrounded by peers who are dependable, ambitious, and supportive.

With that in mind, we have an amazing opportunity for an experienced, intellectually curious, and creative Senior Backend Engineer to join our fast-growing company. Like the rest of us, this person will wear many hats; you will work closely with our founders, our product team, and Wunder’s various teams of finance and solar experts. Your role, broadly speaking, will be to solve problems and push renewable energy forward. Specifically, you will work alongside our talented team of engineers to bring automation to our solar development, solar value evaluation, and loan servicing systems.

Your typical week might involve:

• Writing, reviewing, and maintaining code primarily written in Ruby (Rails + Hotwire)
• Developing and maintaining our CI/CD pipeline which allows our team to rapidly deploy well-tested code to production multiple times per day
• Solving complex problems inherent to our domain with our unique blend of Rails’ best practices, functional principles, and service-oriented design
• Working with our Product team to identify high-leverage solutions to help Wunder achieve its mission
• Shaping our architectural philosophy and technical direction by exploring nascent technologies or problem spaces new to Wunder
• Enjoying unallocated, flexible time for deep work, collaboration, or attending to the important non-work aspects of life (the engineering team has 5 hours of “no meeting zone” per day.
• Establishing the way in which our team and processes evolve as Wunder embarks on its next phase of rapid growth

If you’re looking to build the next iPhone app for teenagers or the next SaaS product for agencies, this role isn’t for you. But if you obsess about your users (at Wunder, they’re often your teammates), are passionate about solving complex problems on a daily basis, and want to fight climate change, then this is the role for you!

• You’re a Builder - You have called yourself a hacker/dev/engineer for 5+ years, during which you’ve dug deep into designing and building high-quality backend systems. Our stack includes Ruby on Rails, Hotwire, PostgreSQL, Heroku, AWS, and CircleCI. While in depth knowledge on each of these is not required, some understanding is useful.
• You Know What You’re Doing - You should be excited to work on a high-output team, be challenged, and do the best work of your career.
• Excited About Cleantech - You are motivated to build technology which drives our clean energy future and, ideally, you are familiar with building the systems necessary to facilitate assessment, development, and management of energy assets.
• You have a Team Ethos - You thrive in a creative, inventive, fast-paced rapid-growth environment, with people who are passionate about their work and mission. You’re not just excited to work cross-functionally, you demand it.
• You Believe That No Problem is Too Hard - In an industry where people are constantly stuck, we find ways to get it done. You know how to articulate and roll out solutions, recognizing there are many solutions to the same problem. You find new and effective ways to streamline and create processes to increase efficiency.

Some Benefits To Look Forward To

Wunder provides one of the only tangible opportunities to truly save the planet - and that’s hard work! Your job impacts nearly every facet of your life, so we provide an extensive compensation and benefits package to ensure Wunder has a positive impact on your life, both personally and professionally.

Salary & Equity

Thebase salary range for this role is $190,000 - $250,000 per year, plus equity in the form of stock options. Wunder determines the successful candidate's compensation package throughout the interview process based on experience and expertise, and the final compensation package will be discussed with the candidate during the final stages of the interview process.

Benefits & PTO

Wunder truly cares about your happiness and well-being, so we strive to ensure our benefits offerings are of top quality. We offer the following benefits to all team members:

• 100% employer-paid medical, dental & vision insurance for all team members
• Employer-paid short-term disability, long-term disability & life insurance
• 401k Matching (50% match up to 4% of your base salary)
• Health Savings Account (HSA) & Dependent Care FSA
• Up to 14 weeks fully paid Parental Leave for childbearing parents; 6 weeks fully paid Parental Leave for non-childbearing parents
• 11 paid holidays & unlimited PTO

Culture

Wunder believes connecting with your team members is instrumental to job satisfaction and your ability to solve complex problems, and facilitating opportunities that support team cohesion is more important than ever! You’ll find our team taking coffee walks or collaborating on Zoom, while also cycling, hiking, climbing, skiing, camping, and dining all over our mile-high home: Colorado. Here are some of the ways we facilitate a flexible yet cohesive work environment:

• A big, bright, modern office located in Downtown Boulder; in-office meals and a fully stocked kitchen
• Commitment to diversity, equity & inclusion through company principles, programs, and events (see below for even more details)
• In-person & virtual events, team offsites, and company retreats
• Annual professional development budget and unlimited book budget
• And so much more!

Commitment to Diversity, Equity & Inclusion (DEI)

Wunder is focused on providing a happy, productive workplace, and we’re constantly improving it! We’re committed to creating and maintaining an inclusive workplace in which all team members have an opportunity to contribute to the success of our mission. At Wunder, people are valued for their skills, experiences, and diverse perspectives, and we encourage all individuals to apply, even if they don’t check every box in the ‘About You’ section above.

Our commitment to equity is embodied in company policy, but it’s also evident every day in how we conduct business and the internal initiatives and programs we provide for our team. Here are some of the ways we strive to ensure everyone feels welcome, safe and free to be themselves at Wunder:

• A holistic, actionable DEI learning strategy that enables all team members to advance inclusivity in a meaningful way
• Inclusive, objective recruiting processes and partnerships with diverse candidate pools & organizations
• Monthly Employee Resource Groups (ERGs), events and initiatives focused on inclusivity
• Equitable Compensation Principles that ensure every team member is paid fairly and equitably
• An environment that values feedback, active listening, flexibility and open communication

Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey.Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiringprocess or thereafter. Any information that you do provide will be recorded and maintained in aconfidential file.

As set forth in Wunder’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law.

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measurethe effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categoriesis as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.