Freelance Software Engineer – Full Stack, Node.js, React, TypeScript

Atmen

Software Engineer integrating customer-facing solutions for a RegTech startup. Building scalable software solutions that connect the platform with customer technology ecosystems.

Posted 7/8/2026full-timeRemote • 🇩🇪 GermanyMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

Distributed SystemsJavaScriptNode.jsPostgresReactTypeScript

About the role

Key responsibilities & impact

Design, build, and maintain full-stack applications using Node.js, React, TypeScript, NestJS, and PostgreSQL.
Develop and maintain integrations with external APIs, including REST and other web service technologies.
Extend and customize our core platform to meet customer-specific business requirements.
Design clean, maintainable, and scalable backend services and frontend applications.
Collaborate with customers and internal stakeholders to understand integration requirements and translate them into technical solutions.
Troubleshoot integration issues across distributed systems and work with third-party vendors when necessary.
Write well-tested, production-ready code with a focus on reliability, performance, and security.
Participate in code reviews, architecture discussions, and continuous improvement initiatives.
Contribute to documentation for integrations, APIs, and internal development processes.

Requirements

What you’ll need

Strong experience with TypeScript.
Professional experience developing backend services with Node.js and NestJS.
Experience building modern frontend applications with React.
Solid understanding of PostgreSQL and relational database design.
Experience consuming and integrating external APIs.
Good understanding of RESTful API design and HTTP protocols.
Experience with Git and collaborative software development practices.
Strong problem-solving skills and the ability to work independently.
Excellent communication skills and the ability to work directly with both technical and non-technical stakeholders.

Benefits

Comp & perks

Asynchronous first: We minimise unnecessary meetings and document everything in Notion.
Focus time & deep work: Meetings-free mornings + 1 in-office Team Day per week.
Fast-paced, iterative development: We push to main frequently and release several times per week.
Strong testing culture: Pragmatic test-driven development (TDD), heavy use of E2E tests.

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 & Tools

Node.jsTypeScriptReactNestJSPostgreSQLRESTful API DesignGitBackend Services DevelopmentFrontend Application DevelopmentIntegration Troubleshooting

Soft Skills

Problem-SolvingCommunicationCollaboration