Senior Full-Stack Developer

Insightful

. Collaborate closely with engineering, product, and design roles within a cross-functional team .

Posted 11/9/2026full-timeBelgrade • SerbiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates strong proficiency in JavaScript and TypeScript, with extensive experience in developing server-side applications using Node.js and building front-end applications, preferably with Angular. Capable of optimizing code for performance and scalability while ensuring security and compliance best practices.

Highest-signal resume keywords

JavaScript ProficiencyNode.js DevelopmentAngular Application DevelopmentAutomated TestingREST API Integration

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

JavaScriptTypeScriptNode.jsAngularNoSQL DatabasesRxJSAutomated TestingREST APIsMicroservices ArchitectureReal-Time Technologies

Soft Skills

Collaborative MindsetCross-Functional TeamworkTechnical Decision-Making

Tools & Technologies

MongoDBElasticsearchKafkaRedisKubernetes

Industry Keywords

Software Design PrinciplesDevelopment Best PracticesSecurity ComplianceAccessibilityTechnical Documentation

Tech Stack

Tools & technologies

AngularCloudDistributed SystemsElasticSearchJavaScriptKafkaKubernetesMicroservicesMongoDBNode.jsNoSQLRedisRxJSTypeScript

About the role

Key responsibilities & impact

Collaborate closely with engineering, product, and design roles within a cross-functional team
Write clean, scalable, high-performance, and reusable code across back-end and front-end layers
Design and implement front-end components and services integrating with back-end APIs and third-party services
Optimize server-side and client-side code for speed, efficiency, and scalability
Implement and monitor application metrics and logs to ensure reliability and detect regressions
Write and maintain automated unit, integration, and E2E tests
Maintain, refactor, and improve existing libraries, modules, and components
Ensure systems follow best practices for security, compliance, and accessibility
Participate in code reviews
Write and maintain technical documentation
Contribute to knowledge sharing and technical decision-making
Evaluate and introduce tools or workflows that improve engineering productivity
Contribute to candidate evaluation and interviews

Requirements

What you’ll need

6+ years of professional programming experience
Strong proficiency in JavaScript and TypeScript
3+ years of hands-on experience developing server-side applications with Node.js
3+ years of experience building front-end applications (Angular preferred)
Solid understanding of software design principles, architecture, and development best practices
Experience working with databases, preferably NoSQL such as MongoDB
Strong knowledge of asynchronous and reactive programming; RxJS is a plus
Comfort with writing and maintaining automated unit, integration, and E2E tests
Experience working with REST APIs and integrating front-end with back-end services
Collaborative mindset and ability to thrive in cross-functional teams
Fluency in English, both written and spoken
Bonus: Experience with Elasticsearch, Kafka, or Redis
Bonus: Background in microservices architecture or distributed systems
Bonus: Familiarity with Angular Material or similar component libraries
Bonus: Experience with real-time technologies like WebSockets
Bonus: Exposure to Kubernetes or cloud-native environments