Senior Full Stack JS Engineer

Why Join Us?

100% remote| Global team| ⏳ Full-time

Ifyou’re looking towork oncutting-edge AIproducts , solvechallenging problems , and bepartofafast-moving,high-talent team , you’ll love ithere.

Join NineTwoThree AIStudio, aremote-first product design, engineering, and marketing studio, founded in2012 and based inBoston. WebuildAI-powered web and mobile apps for big brands and fast-moving startups.

You’ll work withreally smart people — the kind of teammates who challenge you, push you forward, and make you better. Wemovefast and focus ongetting things done .
We’ve beengrowing20% every year for the last 5years, which means there’s plenty ofroom for career growth and promotions. Our work speaks for itself—someofour customers foundus throughfive layers ofreferrals . That’s how much people appreciate what wedo.

Werun onclear processes and strong leadership, sowhile wemove quickly, wedon’t dochaos . Wedohigh-quality work, and wedoitright.

Wefocus onproducts with apositive impact invarious domains fromsports and health, tologistics and nuclear . But ifyou’re into gambling, adult entertainment, orcrypto, we’re not your place.

What You’ll Do

Lead, not just code — Seniors atNineTwoThree don’t just write great code—they lead projects, guide teams, and ensure execution quality:

• Connect the dots between product vision, technical feasibility, and business needs.
• Communicate options, trade-offs, costs, and timelines clearly toboth our team and client.
• Lead projects end-to-end — from technical strategy toexecution.
• Architect solutions and apply best practices for scalable, AI-powered products.
• Guide and mentor engineers, ensuring quality while delivering fast.
• Translate business needs intotechnical decisions , explaining trade-offs and timelines.
• Solve hard problems , direct implementation, and coordinate technical challenges with clients
  

Who We’re Looking For
True senior engineers— not just people with years ofexperience, but those whoown solutions anddrive execution.

• 5+years ofexperience inFull Stack Software Development (React, Node.js, Python, SQL)
• Strong knowledge ofcloud platforms (AWS, Azure orGCP).
• Clear and thorough understanding ofdesign patterns and software developmentbest practices
• Great communicators who can explain options, trade-offs, and technical details toclients and teams.
• Ability tobreak down complex problems into manageable tasks;
• Passion maintaining code style and standards and holding people accountable;
• Hands-on experience with microservices architecture;
• Experience with React.js, Node.js, JavaScript and Typescript (atleast 5years);
• RESTful API design and implementation;
• OAuth and single sign-on (SAML);
• Leaders whoensure execution quality , push teams forward, and keep projects ontrack.
• Strong communication and analytical skills
• Relational and no-SQL databases— MySQL, PostgreSQL, Redis etc;
• Solid understanding ofprinciples ofJavaScript/TypeScript languages
• Ability tofreely express /present/discuss ideas inEnglish (B2-C1level)
• Flexibility with working hours toparticipate inmeetings with Eastern USA.
  

🚫Not for you ? Ifyou’re looking for apure coding role where someone else makes the decisions, this isn’t it.

What WeOffer

• Annual paid vacation:20days-off per year during the first 3years, further increasing to25days inlater years.
• Paid sick leave,10national holidays and2company days-off.
• Well-being budget.
• Maternity/paternity leave.
• Accounting assistance.
• Reimbursement ofexpenses for professional developmentcourses/certifications (upto100% inagreement with the Manager).
• Hardware upon business needs.
• Strong positiveengineering culture , atightly-knit team ofprofessionals with agood sense ofhumor .
  

What’s The Process

Wemake the process fast and responsive. Short HRinterview, Technical Q&A, Hands-on Practical Session (nobubble sorts), CTO interview (sometimes), Offer.

Apply now and lead the next generation ofAI-powered products.