Senior Full Stack JS Engineer

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October 24

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NineTwoThree Studio

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Artificial Intelligence • SaaS • B2B

NineTwoThree Studio is an award-winning software design, engineering, and marketing studio headquartered in Boston, MA. The company specializes in building AI, web, and mobile applications for established brands and funded startups. With a focus on agile methodology, design thinking, and impeccable engineering, NineTwoThree Studio provides custom software development, generative AI, machine learning, and go-to-market strategies. They are known for their innovative solutions that help brands scale and iterate, supported by a team of 70 experts. The studio has successfully built 75 products and 14 startups, earning recognition as the #1 Boston Agency for four years in a row. They work across multiple industries, offering services in design sprints, product strategy, and mobile app development.

51 - 200 employees

Founded 2012

🤖 Artificial Intelligence

☁️ SaaS

🤝 B2B

📋 Description

• 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

🎯 Requirements

• 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.

🏖️ Benefits

• 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**.