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NineTwoThree AI StudioNS

Senior Full Stack JS Engineer

NineTwoThree is a premier software studio focused on AI solutions, serving established brands and startups since 2012.

NineTwoThree AI Studio

Employee count: 51-200

Ukraine only

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Why Join Us?

🔹 100% remote | 🌎 Global team | ⏳ Full-time

If you’re looking to work on cutting-edge AI products, solve challenging problems, and be part of a fast-moving, high-talent team, you’ll love it here.

Join NineTwoThree AI Studio, a remote-first product design, engineering, and marketing studio, founded in 2012 and based in Boston. We build AI-powered web and mobile apps for big brands and fast-moving startups.

You’ll work with really smart people—the kind of teammates who challenge you, push you forward, and make you better. We move fast and focus on getting things done.

We’ve been growing 20% every year for the last 5 years, which means there’s plenty of room for career growth and promotions. Our work speaks for itself—some of our customers found us through five layers of referrals. That’s how much people appreciate what we do.

We run on clear processes and strong leadership, so while we move quickly, we don’t do chaos. We do high-quality work, and we do it right.

We focus on products with a positive impact in various domains from sports and health, to logistics and nuclear. But if you’re into gambling, adult entertainment, or crypto, we’re not your place.

Requirements

What You’ll Do

Lead, not just code — Seniors at NineTwoThree 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 to both our team and client.
  • Lead projects end-to-end — from technical strategy to execution.
  • Architect solutions and apply best practices for scalable, AI-powered products.
  • Guide and mentor engineers, ensuring quality while delivering fast.
  • Translate business needs into technical 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 of experience, but those who own solutions and drive execution.

  • 5+ years of experience in Full Stack Software Development (React, Node.js, Python, SQL)
  • Strong knowledge of cloud platforms (AWS, Azure or GCP).
  • Clear and thorough understanding of design patterns and software development best practices
  • Great communicators who can explain options, trade-offs, and technical details to clients and teams.
  • Ability to break 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 (at least 5 years);
  • RESTful API design and implementation;
  • OAuth and single sign-on (SAML);
  • Leaders who ensure execution quality, push teams forward, and keep projects on track.
  • Strong communication and analytical skills
  • Relational and no-SQL databases — MySQL, PostgreSQL, Redis etc;
  • Solid understanding of principles of JavaScript/TypeScript languages
  • Ability to freely express/present/discuss ideas in English (B2-C1 level)
  • Flexibility with working hours to participate in meetings with Eastern USA.

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

Benefits

What We Offer

  • Annual paid vacation: 20 days-off per year during the first 3 years, further increasing to 25 days in later years.
  • Paid sick leave, 10 national holidays and 2 company days-off.
  • Well-being budget.
  • Maternity/paternity leave.
  • Accounting assistance.
  • Reimbursement of expenses for professional development courses/certifications (up to 100% in agreement with the Manager).
  • Hardware upon business needs.
  • Strong positive engineering culture, a tightly-knit team of professionals with a good sense of humor.

What’s The Process

We make the process fast and responsive. Short HR interview, Technical Q&A, Hands-on Practical Session (no bubble sorts), CTO interview (sometimes), Offer.

Apply now and lead the next generation of AI-powered products.

About the job

Apply before

Posted on

Job type

Full Time

Experience level

Senior

Location requirements

Hiring timezones

Ukraine +/- 0 hours

About NineTwoThree AI Studio

Learn more about NineTwoThree AI Studio and their company culture.

View company profile

NineTwoThree is a leading software design, engineering, and marketing studio that specializes in building custom artificial intelligence (AI) solutions for established brands and funded startups. Our mission is to help clients maximize their investment in technology by driving positive ROI and scalability through innovative AI-driven applications. Since our inception in 2012, we have partnered with various distinguished customers, launching over 150 products and several internal startups.

Our expertise encompasses a myriad of domains including conversational AI, generative AI, and classic machine learning, enabling us to tackle the unique challenges that businesses face today. At NineTwoThree, we pride ourselves on our ability to deliver consistent and reliable results, underpinned by a virtuous cycle of feedback, learning, and improvement. Our experienced team is dedicated to fostering long-term relationships with clients, ensuring that every project benefits from a stable and proven workforce with an impressive 90% talent retention rate. NineTwoThree has been recognized multiple times as a top AI agency in the U.S. and continues to break ground in mobile app development, creating engaging and user-friendly solutions that cater to diverse audiences.

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NineTwoThree AI Studio

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NineTwoThree AI Studio hiring Senior Full Stack JS Engineer • Remote (Work from Home) | Himalayas