Senior Backend Engineer (Node.js)

Qandabais hiring aSenior Backend Engineer (Node.js)to work with our U.S.-based engineering team on cutting-edge, large-scale data platforms.
You'll lead backend development using Node.js and modern JavaScript frameworks, designing APIs that processbillions of data points and power analytics platforms for global enterprise clients.

About Qandaba

Qandaba is a premier technology consultancy specializing in placing top-tier engineering talent on mission-critical, large-scale data projects. This role is a for a long-term engagement with a leading, global client in themobile telecommunications and big data analyticssector. The project involves working on the client's core, customer-facing web platforma powerful application that translates trillions of raw data points into actionable insights for major industry decision-makers.

Role Description

We are seeking a highly experiencedSr. Software Engineer, Web Applications, Full Stackwith deep expertise innode.js.You will be responsible for the end-to-end development of features for a core web-based analytical platform. You will build and maintain highly performant APIs usingnode.jsto efficiently query, process, and serve insights from massive telecommunications datasets. You will also use your front-end expertise to create intuitive, powerful user interfaces that enable clients to visualize, filter, and extract critical network intelligence.

Key Responsibilities

• Design, develop, and optimizerobust, scalable backend systemsusingNode.jsandExpress.
• Build and maintainRESTful APIsfor high-volume data access and processing.
• Integrate and optimizerelational (MySQL)andNoSQL (MongoDB)databases.
• Ensure data integrity, performance, and security across all backend services.
• Help optimize database queries and data access patterns to ensure fast retrieval and presentation of insights from terabytes of data.
• Build responsive and efficientfront-end components, utilizingVue,jQuery, orDevExpress, focusing on interactive data visualization, complex data filtering, and mapping features for the analytical web application.
• Collaborate with data science and product team members to deliver performant backend services supporting complex analytics.
• Ensure code quality, maintainability, and proper testing (unit, integration) across the full stack.
• Partner with U.S.-based engineers and stakeholders to align on technical requirements and solutions.
• Proactively suggest and provide technical guidanceto improve team practices and enhance overall product performance.
• Collaborate on observability initiatives, includingmetrics, logging, and monitoring.
• Participate inAgile/Scrum ceremonies, contributing to iterative delivery and team collaboration.
• Clearlypresent and explain complex engineering problems and designsto both technical and non-technical audiences.

Qualifications

• 5+ years of professionalFull Stack developmentexperience.
• Proven expertise innode.jsand related frameworks (Express,Vue,jQuery, Bootstrap, DevExpress) for building high-performance back-end applications.
• Experience with relational (MySQL) and NoSQL (MongoDB) databases particularly in optimizing queries for large scale data applications.
• Configuring and managingNGINX- SSL, security, certification, and site management
• Proven ability to work on a platform that handles complex data processing and analytical insights.
• Solid understanding ofdistributed systemsand high-availability architectures.
• Familiarity withAI-first developer tools(e.g., GitHub Copilot, Cursor, ChatGPT) to accelerate development and problem-solving.
• Experience working withinScrum or Agile software development practices.
• Familiarity withAtlassian Jira and Confluencefor collaboration and project tracking.
• Experience in version controls systems includingGit.
• Strongcommunication skills, with the ability to present and explain complex engineering solutions effectively.
• Excellent written and spoken English; comfortable working with remote international teams.
• Other nice to haves: Expertise in Linux shell commands, MVC Design, Google Maps API, GeoJSON, KML, ArcGIS, ClickHouse, Flume, Docker, Jenkins

Work Setup

• Remote / Work from Home must have a reliable internet connection, camera/microphone, and professional workspace.
• Mid- or Night Shift aligns core working hours with U.S. teams in the Pacific time zone.
• Internet and Equipment Allowance

Why Join Us

• Work withcutting-edge data technologiesat massive scale.
• Collaborate with aglobal, highly skilled engineering team.
• Competitive compensation (negotiable based on experience).
• Paid Vacation and Holidays
• Continuous learning and international collaboration opportunities