Senior Full-Stack Engineer — Remote Contract (10-40 hrs/wk)

Crossing Hurdles; Indonesia; Remote; IDR 1,249,410,000 - 2,498,821,000; Part time

Job summary

Crossing Hurdles is seeking a Sr. Full-Stack Software Engineer for a remote contract role.

You will build and maintain production-grade full-stack applications with emphasis on scalable APIs, UI/UX, and robust data models. The role requires deep experience across front-end and back-end technologies, proficiency with multiple programming languages, and the ability to navigate unfamiliar codebases while ensuring security and performance.

Qualifications

• Strong professional experience developing production full-stack applications.
• Hands-on experience with both front-end and back-end engineering.
• Production experience with multiple programming languages.
• Strong knowledge of browser applications, APIs, application state, databases, and service integration.
• Experience understanding and contributing to the architecture of complete software systems.
• Ability to work effectively in unfamiliar codebases.
• Strong debugging and technical problem-solving skills.

Responsibilities

• Develop, modify, and debug front-end and back-end application components.
• Implement user-facing features and the services, APIs, and data models that support them.
• Trace requests and data across browsers, front-end applications, APIs, services, databases, and external integrations.
• Work inside unfamiliar repositories and understand existing application architecture.
• Diagnose failures involving application state, API contracts, authentication, persistence, networking, and deployment.
• Evaluate and improve code written in multiple programming languages.
• Review AI-generated solutions for correctness, completeness, performance, security, and maintainability.

Skills

Full-stack development

Front-end development

Back-end development

API integration

React

Node.js

Python

SQL

Tools

React

Node.js

Python

SQL

Job description

Crossing Hurdles is seeking a Sr. Full-Stack Software Engineer for a remote contract role.

You will build and maintain production-grade full-stack applications with emphasis on scalable APIs, UI/UX, and robust data models. The role requires deep experience across front-end and back-end technologies, proficiency with multiple programming languages, and the ability to navigate unfamiliar codebases while ensuring security and performance.