Senior JavaScript/Node.js Developer, FinTech

Sigma Software Group

Node.js expert involved in designing and implementing FinTech solutions for a rapidly expanding company in Europe. Collaborating with teams on technical design, documentation, and clean code practices.

Posted 5/30/2026full-timeRemote • 🇷🇴 RomaniaSeniorWebsite

Tech Stack

Tools & technologies

AWSGraphQLJavaScriptMicroservicesNode.jsReactTypeScript

About the role

Key responsibilities & impact

Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on Node.js and ReactJS
Maintain a consistently high level of quality throughout all stages of the development
Communicate effectively to collaborate closely with the team and gain full context for complex tasks
Follow the best engineering practices, as well as company and client guidelines
Play supervisory, advisory, and coaching roles for less-experienced engineers on the team
Promote clean code, as well as design patterns and principles

Requirements

What you’ll need

Over 5 years of experience in Back-end software development
At least 3 years of experience with TypeScript
Over 4 years of experience working with Node.js
Experience with Experience AI Agentic systems and MCP (Model Context Protocol) integrations
Strong experience in designing distributed and secure systems
Good Front-end development skills
Good understanding of microservices architectures
Experience in designing, building, and maintaining APIs
Experience in building and consuming REST and/or GraphQL APIs
Familiarity with DevOps practices
Strong experience working with AWS
Good knowledge of testing best practices
At least an Upper-Intermediate level of English.
Experience with modern JavaScript and ES6 libraries

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account Sigma Software Group Website LinkedIn All Job Openings 1001 - 5000 employees Founded 2002 🎮 Gaming 📡 Telecommunications Software Development
Gaming
Telecommunications Sigma Software Group is a multinational company, established in 2002, that specializes in providing high-quality software development, graphic design, testing, and support services. The company focuses on delivering solutions across various industries such as automotive, telecommunications, aviation, advertising, gaming, banking, real estate, and healthcare. Sigma Software values professional growth, offers remote work opportunities worldwide, and caters to world-renowned clients like AstraZeneca, Scania, and SAS. The company emphasizes a culture of continuous education, mentorship, and flexible work environments, making it a preferred workplace for IT specialists aiming to work on complex solutions utilizing cutting-edge technologies. Sigma Software is committed to innovative solutions and engineering the future while also contributing to social causes such as charitable work in Ukraine. Senior JavaScript/Node.js Developer, FinTech 🕒 May 19 🇷🇴 Romania – Remote ⏰ Full Time 🟠 Senior 🔙 Backend Engineer AWS GraphQL JavaScript Microservices Node.js React TypeScript Apply Now Find Hiring Managers Customize resume + cover letter Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on Node.js and ReactJS
Maintain a consistently high level of quality throughout all stages of the development
Communicate effectively to collaborate closely with the team and gain full context for complex tasks
Follow the best engineering practices, as well as company and client guidelines
Play supervisory, advisory, and coaching roles for less-experienced engineers on the team
Promote clean code, as well as design patterns and principles 🎯 Requirements
Over 5 years of experience in Back-end software development
At least 3 years of experience with TypeScript
Over 4 years of experience working with Node.js
Experience with Experience AI Agentic systems and MCP (Model Context Protocol) integrations
Strong experience in designing distributed and secure systems
Good Front-end development skills
Good understanding of microservices architectures
Experience in designing, building, and maintaining APIs
Experience in building and consuming REST and/or GraphQL APIs
Familiarity with DevOps practices
Strong experience working with AWS
Good knowledge of testing best practices
At least an Upper-Intermediate level of English.
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Hard Skills & Tools

Node.jsReactJSTypeScriptAPI designRESTGraphQLmicroservicesdistributed systemssecure systemsJavaScript

Soft Skills

communicationcollaborationsupervisoryadvisorycoachingquality assuranceengineering best practices