Full Stack Developer

Philadelphia, Pennsylvania, United States · Development expand job description ↓


O3 World is seeking a Full Stack Developer with a passion for building great tools and compelling experiences like the projects listed in the WORK section of our site. You will work with some of the brightest project managers, designers, and developers in the business to define, plan, build, and deliver exceptional websites and applications.

As a member of the O3 team, you will be involved in projects from the ideation and strategy phase all the way through launch and have a say in not just what we build, but how we build. Additionally, you will have the opportunity to contribute to the overall technical direction and project workflow through research and development of new tools and technologies.

We are looking for someone with a solid understanding of the fundamentals of web development and the underlying technologies of the web who can easily pick up the technologies we’re working with now and will be working with in the future.

At O3, we are constantly looking for new tools and improving our process, which is based on Scrum, but has been infused with O3 Values and tweaked for what works best in the agency environment.

O3 team members are not only encouraged to learn, it’s required. We’re always doing things we’ve never done before and piloting new techniques. We also frequently host meetups and give team members the opportunity to go to conferences and training.

The culture at O3 is very collaborative but also provides a high degree of autonomy. You’ll have lead devs and UX designers available to lend a hand when things get tricky, but also have plenty of heads of down time to get your work done the way you want to.


  • 2+ years professional web development experience
  • Smart and hard working
  • Patient and positive
  • Adaptive to change
  • Autonomous - does not require intense oversight
  • Outstanding problem-solving skills
  • Excellent verbal and written communication skills
  • Attention to detail, highly organized, with focus on quality of work
  • Understanding and respect for best practices and craftsmanship


You don’t have to have experience with all of these, but you should have experience with some of them and an interest to learn the others

  • HTML with an emphasis on semantic markup and accessibility best practices
  • CSS / Sass including a solid understanding of responsive design techniques
  • JavaScript: Angular, React
  • Any of the following languages: PHP, Ruby, Python, Go and at least one framework/platform that utilizes that language (e.g. Laravel, Rails, Django)
  • Node.js & Express
  • Hybrid App Frameworks: Ionic, React Native
  • Automated Testing Tools: PHPUnit/Spec: BeHat, Jasmine / Mocha, Karma / Chutzpa, Selenium
  • Databases: RDBMS and noSQL
  • Understanding of high-level DevOps and Security practices, or a strong willingness to learn.


  • Amazing office space in Fishtown, flex vacation time, paid trips to national and regional industry events and conferences, paid training, speaking opportunities, company happy hours, casual office dress code, monthly one-to-one employee growth meetings, lunch and learns, sponsored networking events, employee referral program, company holidays and half-days, quiet rooms, annual holiday party, peer-to-peer recognition, annual non-profit participation, neighborhood outreach events, your own personal theme music, and more…
  • Medical coverage including vision and dental coverage, short and long term, life insurance plan, 401k with company match

O3 is an equal opportunity employer (EOE). We look forward to meeting with you.

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