Full-Stack Engineer (Next.js + TypeScript)

Seven Sigma Group; United States; Remote; USD 119,000 - 172,000; Full time

Job summary

Seven Sigma Group is seeking a seasoned full-stack engineer for a long-term remote role. You will own features across the entire product stack, shaping technical direction and shipping polished features to production with a small, quality-focused team.

You will design and build full-stack features with Next.js, TypeScript, Node.js, and PostgreSQL, while crafting responsive UIs with Tailwind CSS and optimizing performance. Expect collaboration and architectural input in a remote UK setting.

Qualifications

• Deep expertise in Next.js and TypeScript with advanced patterns and modern features.
• Production experience shipping real Next.js apps end to end.
• Strong Node.js experience building backend services and APIs.
• Mastery of PostgreSQL including schema design, query optimization and migrations.
• Tailwind CSS proficiency for responsive UI work.
• Experience with deployment workflows on Vercel, Railway or comparable platforms.
• Excellent written and spoken English communication.

Responsibilities

• Design and build full-stack features using Next.js and TypeScript.
• Develop and maintain backend services and APIs in Node.js.
• Design and optimize PostgreSQL schemas, queries, and migrations.
• Build responsive production UI with Tailwind CSS.
• Profile and optimize performance across the stack.
• Review code, mentor teammates, and contribute to architecture decisions.

Skills

Next.js

TypeScript

Node.js

PostgreSQL

Tailwind CSS

Deployment platforms

Tools

Vercel

Railway

Job description

Role overview

A long-term, full-time remote role for a seasoned full-stack engineer who can take ownership across the entire product stack. You'll contribute to multiple modern web applications, shape technical direction, and ship polished features to production alongside a small, quality-focused team.

Responsibilities

• Design and build full-stack features using Next.js (App Router, Server Components, Server Actions) and TypeScript.
• Develop and maintain backend services and APIs in Node.js.
• Design and optimize PostgreSQL schemas, queries, and migrations.
• Build responsive, production-quality UIs with Tailwind CSS.
• Profile and optimize application performance across the stack.
• Review code, mentor teammates where appropriate, and contribute to architectural decisions.

Requirements

• Deep expertise in Next.js and TypeScript, including advanced patterns and modern Next.js features.
• Production experience shipping real Next.js applications end to end, beyond tutorial-scale work.
• Strong Node.js experience building backend services and APIs.
• PostgreSQL mastery, including schema design, query optimization, and migrations.
• Tailwind CSS proficiency for fast, responsive UI work.
• Experience with modern deployment workflows such as Vercel, Railway, or comparable platforms.
• Strong written and spoken English communication skills.

Nice to have

• Building AI-powered features with the Vercel AI SDK, TypeScript-based AI libraries, or production LLM integrations.
• Experience with streaming responses, real-time AI features, tRPC or similar type-safe API layers, Edge functions, middleware, or open-source contributions.
• A product-minded approach, independence, and a quality-first shipping attitude.

Benefits and work setup

• Full-time, 40-hour-per-week position based remotely in the UK (London).
• Flexible remote work within a small, focused team that values engineering quality.
• Long-term growth potential and direct impact on products used by real customers.