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Colmex

Senior Backend Engineer (Node.js, TypeScript & Azure)

Colmex Tel-Aviv, Tel-Aviv District, Israel

Financial Services · 51-200 employees

8 h ago
typescript Senior (5-10 yrs) Full-time Israel
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About the role

Design, develop, and maintain scalable backend services and REST APIs while optimizing cloud-native solutions on Microsoft Azure. Collaborate with cross-functional teams to improve system performance, reliability, and security within a fintech environment.

What they look for

Node.js TypeScript Azure REST APIs Microservices SQL NoSQL Event-driven architecture CI/CD Docker Kubernetes NestJS PostgreSQL MongoDB Redis Fintech

Requirements

Requires 5+ years of hands-on backend development experience with strong proficiency in Node.js and TypeScript. Candidates must have proven experience in building scalable cloud-native applications and distributed systems architecture on Azure.

Full description

We are looking for a talented and experienced Senior Backend Engineer to join our R&D team at Colmex Group.

In this role, you will design, develop, and maintain scalable, high-performance backend systems that power our fintech products and platforms.

You will work with modern cloud technologies, contribute to architectural decisions, and collaborate with cross-functional teams to build reliable, secure, and innovative solutions in a dynamic technological environment.

Key Responsibilities

  • Design, develop, and maintain scalable backend services and REST APIs.
  • Build and optimize cloud-native solutions on Microsoft Azure.
  • Collaborate closely with Frontend, Mobile, Product, DevOps, and Data teams.
  • Improve system performance, reliability, observability, and security.
  • Participate in architectural discussions and contribute to technical decision-making.
  • Troubleshoot and resolve complex production issues.
  • Promote engineering best practices, code quality, automated testing, and continuous improvement.

Requirements

  • 5+ years of hands-on backend software development experience.
  • Strong proficiency in Node.js and TypeScript.
  • Proven experience designing and building scalable REST APIs and backend services.
  • Solid understanding of microservices and distributed systems architecture.
  • Strong experience developing cloud-native applications on Microsoft Azure.
  • Hands-on experience with Azure services such as App Services, Functions, Service Bus, Event Grid, Storage Accounts, Key Vault, and Application Insights.
  • Strong knowledge of SQL and NoSQL databases.
  • Experience with event-driven architectures and asynchronous processing.
  • Experience building and maintaining CI/CD pipelines using Azure DevOps or GitHub Actions.
  • Hands-on experience with Docker and containerized environments.
  • Strong understanding of software design principles, security, scalability, and performance optimization.
  • Experience with automated testing and modern software engineering practices.
  • Familiarity with AI-assisted development tools such as GitHub Copilot, Cursor, Claude Code, or similar.
  • Excellent problem-solving, communication, and collaboration skills.

Nice to Have

  • Experience with NestJS.
  • Familiarity with PostgreSQL, MongoDB, Redis, or MSSQL.
  • Background in fintech, trading platforms, or financial services.
  • Experience with Kubernetes (AKS).
  • Experience developing high-volume, customer-facing systems.

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