The Role

Sefaira is looking for talented software engineers to join us in our effort to build the greatest software for helping architects design buildings with best-of-class sustainability performance.

We are looking for someone with outstanding core skill in programming, program design, and testing, as well as a strong ability to engage in open-minded technical debates. A great candidate will likely have expertise programming in some bleeding-edge language (Scala, JavaScript (the Good Parts), Racket, Haskell, etc). We are looking for someone who knows how to push to and monitor code in production (AWS, Heroku), and is excited to learn new techniques, languages and tools (functional programming, MongoDB, Node.js).

Once you arrive at Sefaira, you should be ready to learn about how architects work and how building energy analysis is done. If you have experience developing for the web, great, we will put it to use. Any experience iterating on a customer-facing product will find uses as well.

Though the people with the skill we are looking for are likely to have Computer Science higher-ed degrees, we will consider all applications based on demonstrated coding ability. For instance, we will be happy to take into consideration your online portfolio of open source contributions.

Our team is small and each person is expected to work across the stack. The development team works collaboratively with each other across disciplines, product management, architects and mechanical engineers. The work is iterative and responsive to changing priorities. We strive to go from idea to production fast.

Every member of the team is expected to collaborate with others in the organization, come up with new ideas and promote them within the organization, have high quality standards, and to get stuff shipped to our customers that will change the way they and the industry at large designs buildings.


  • Competitive salary
  • Stock options
  • 5 weeks vacation
  • Medical, dental and vision insurance
  • 401k with company match
  • Equipment of your choice


This full-time position is based in New York City. We are located at Union Square.

About Sefaira

For designers who aspire to design high performance buildings, Sefaira, founded in 2009, provides the very best web and desktop applications to enable immersive and seamless performance-based design with real-time feedback on the impact of design decisions.

Our Values

At Sefaira, 7 core values drive our work:

  • Learning, Growth & Science
  • Agile & Lean Mindset
  • Empowerment, Judgement & Accountability
  • Teamwork & Respect
  • Clarity & Communication
  • An Aesthetic and Sustainable World
  • Passion

Our Customers

Our software is built for use by architects and designers. As lead designers of the built environment, architects literally shape our world, and they have direct power to influence the sustainability of society through their designs. We empower architects to improve global sustainability in a meaningful way. Sefaira is in use at 170+ architecture firms globally, including 5 of the World Architecture Top 10 firms.


Since our inception in 2009, we have won numerous awards for our contribution to the fields of sustainability, technology, and design.

  • Gold Winner - Ecosummit 2013
  • Europe Top 100 - Red Herring 2013
  • Global Top 200 Private Company - GoingGreen 2012
  • Green Building Innovation of the Year Winner - Ecobuild 2011

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Scala Developer for Green Building Software at Sefaira - Scala