Senior Frontend Developer

Thelab
New York, NY

Sr. Frontend Developer - Wellcom Home

We are looking for an experienced front-end developer to work on our internal workflow enhancement and automation platform, Wellcom Home. This platform houses all of our tools built around traditional automation and ML / LLM software. The ideal candidate would have experience working closely with designers and large frontend codebases. We are looking for someone who is self-motivated and is able to work with a team early on in a project, plan and identify requirements, see a project through to completion, and mentor junior members of the team along the way.

About thelab

We’re an agency of makers with deep expertise in solving creative and technology challenges. Our focus is on making better work to help brands work better. From branding & design, to software builds, large-scale ecommerce or anything in between, thelab mixes inspiration and hard work to produce results that mean business. Oh, and we host a mean barbecue too.

We will be

An awesome place for you to grow and learn. We stay open-minded about ideas and make sure our technology is always up-to-date, because we believe the best work gets made when we evolve our skills together. thelab is large enough to get an amazing variety of work, but small enough to stay flexible and work with smaller brands and startups too—we even have a few products of our own. You’ll work on a lot of different kinds of projects, and you’ll do it with reasonable timelines, surrounded by an inclusive community who wants to see you succeed (no brogrammers, please!). And you’ll generally finish your day with plenty of time left over to meet your friends for a drink—or grab one with your new team.

What our interview process looks like:


  1. We’ll schedule an initial phone interview so we can get to know you, answer any questions you may have, and see if we might be a good fit for you and vice versa.

  2. From there, we’d want to bring you in for a second-round interview and would email you details about a general architectural problem beforehand.

  3. At the second round interview, we’re looking to understand your thinking process—not your knowledge of algorithms. That’s why we won’t be asking you to do whiteboard problems, but instead, we’ll ask you to explain your high-level approach to the architectural problem we shared, articulating it to both an experienced and junior dev.

You are


  • A team player who thrives in a collaborative environment—no lone wolf mentalities!

  • Experienced in leading teams and mentoring people

  • Not afraid to fail and always looking to learn from those failures

  • Able to understand different approaches and comfortable learning/using both newer and older tech when it’s a better fit

  • Able to develop web functionality in TypeScript and SASS

  • Able to lead complex single page web applications with frontend frameworks, such as Angular/React/etc, and Node. Leader in architecture decisions like state management and server side rendering.

  • Able to work with APIs and have a high level understanding of how frontends and backends interact

  • Comfortable developing shared components that leverage modern JavaScript design patterns


  • Able to prototype solutions with design that can eventually scale to larger solutions

  • Able to manage multiple projects and deliverables occurring concurrently during a sprint

  • Experience in collaborating with a design team to create great user experiences including complex styling and animation

  • Looking to work on a diverse team because you enjoy hearing different opinions and ideas

Nice to haves (Not required)


  • Preference of command line interfaces over graphical

  • Knowledge of running dev environments through Docker

  • Experience working in open source community and contributing changes

  • Keeping up to date with latest design tooling, such as Sketch and Avocode

  • Experience in e-commerce

  • Knowledge of server side rendering techniques in Node

  • Python and Django experience

  • Experience with large scale Angular applications

  • Experience with large scale React applications

This role is hybrid - requiring Tuesday-Thursday in our Madison Square office. Benefits include heath, dental/vision through Empire BCBS, 401k match, unlimited PTO and the best snacks in town.

Posted 2026-01-16

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