Software Engineer – Typescript/NodeJS

Salt; Amsterdam; On-site; EUR 131,000 - 145,000; Full time

Job summary

Salt is hiring a Software Engineer for a client in Amsterdam. The role is freelance (KVK/ZZP needed) for 12 months, paying around 95-100 euros per hour.

You will design, build, deploy, and operate reliable, scalable software services with end-to-end ownership, contributing to architecture and technical decisions while working closely with product and engineering teams. The position requires strong TypeScript/Node.js skills, hands-on AWS/serverless experience, and the ability to deliver

Qualifications

• Strong experience with TypeScript and API development.
• Hands-on AWS and serverless architectures.
• Deep knowledge of queues, workers, orchestration and idempotency.
• Experience with S3, DynamoDB, security, observability and CI/CD.
• Ability to independently deliver software from design through production.
• Strong problem-solving and collaboration skills.

Responsibilities

• Design and build scalable, secure applications and APIs.
• Own solutions end-to-end from design to production.
• Develop distributed systems using TypeScript/Node.js and AWS.
• Implement testing strategies: unit, integration, contract testing.
• Monitor production systems with logs, metrics and alerts.
• Investigate incidents and contribute to reliability improvements.
• Collaborate with product, engineering and partner teams.

Skills

TypeScript

Node.js

API development

AWS

Serverless

S3

DynamoDB

CI/CD

Observability

Testing

Security

Production operations

Distributed systems

Code quality

AI-assisted development

Tools

AWS

S3

DynamoDB

Job description

Salt is currently hiring a Software Engineer for a client of ours in Amsterdam. Role is freelance(kvk/zzp needed) for 12 months, paying around 95-100 euros an hour. We're looking for a Software Engineer to design, build, deploy, and operate reliable, scalable software services. You'll take end-to-end ownership of solutions, contribute to architecture and technical decisions, and work closely with product and engineering teams.

Key Responsibilities

• Design and build scalable, secure, and maintainable applications and APIs.
• Own solutions end-to-end - from design and development through testing, deployment, monitoring, and production support.
• Build reliable distributed systems using TypeScript/Node.js, AWS Lambda, S3, DynamoDB, queues, workers, and orchestration.
• Design for resilience with timeouts, retries, idempotency, circuit breakers, dead-letter handling, and graceful degradation.
• Apply strong testing practices, including unit, integration, and contract testing.
• Monitor and improve production systems using logs, metrics, traces, SLIs, SLOs, and meaningful alerts.
• Investigate production issues, lead root-cause analysis, and implement long-term reliability improvements.
• Contribute to architecture, technical design, and continuous improvement initiatives.
• Collaborate effectively with product, engineering, and partner teams to clarify requirements and solve complex problems.

Must-Have Skills

• Strong experience with TypeScript/Node.js and API development.
• Hands-on experience with AWS and serverless/distributed systems.
• Strong understanding of queues, workers, orchestration, scaling, retries, and idempotency.
• Experience with S3, DynamoDB, security, observability, testing, CI/CD, and production operations.
• Ability to independently deliver software from design through production.
• Strong programming fundamentals and experience writing clean, reusable, maintainable code.
• Experience with coding agents and modern AI-assisted development.
• Strong problem-solving, communication, and collaboration skills.

*Rates depend on experience and client requirements