Software engineer TS/Node.js / AWS

Freelance software engineer

For a client based in Amsterdam, We are looking for a freelance software engineer that can join a Bulk Operations Module team. This role is only suitable for freelance candidates (ZZP) that are based in the Netherlands. No relocation or sponsorship is provided.

Must-have skills

• Techstack: TypeScript/Node.js and API development, AWS services, AWS Lambda, queues, workers, orchestration, idempotency, retries, and scaling, S3, DynamoDB, security, observability, testing, CI/CD, and operations

• Independent end-to-end delivery: Owns the design, implementation, testing, deployment, and production operation of software solutions with limited supervision.
• Strong programming fundamentals: Writes readable, maintainable, and reusable code in the team's primary programming language. Experience developing with coding agents.
• Testing and quality: Independently applies unit, integration, and contract testing; writes testable code and maintains appropriate test coverage.
• Production ownership: Deploys and monitors services independently, investigates production issues, and uses logs, metrics, and traces effectively.
• Reliability and failure handling: Designs for failure using mechanisms such as timeouts, retries, circuit breakers, dead-letter handling, and graceful degradation.
• Observability: Defines and uses meaningful Service Level Indicators (SLIs), Service Level Objectives (SLOs), key performance indicators, and alerts.
• Collaboration and communication: Clarifies requirements, identifies edge cases, communicates technical decisions, and collaborates effectively with product and partner.

Good-to-have skills

• AWS Durable Lambdas for orchestration and execution
• Experience evolving APIs and schemas while maintaining backward compatibility.
• Familiarity with experimentation, continuous delivery, feature flags, and safe rollout strategies.
• Agent programming using a spec driven development framework like openspec.

Let op: vacaturefraude

Helaas komt vacaturefraude steeds vaker voor. We waarschuwen je voor mogelijke misleiding:

• Wij zullen nooit via WhatsApp of in een videogesprek vragen om jouw persoonlijke gegevens (zoals een kopie van je ID, bankgegevens of BSN).
• Twijfel je over de echtheid van een vacature of contactpersoon? Neem dan altijd rechtstreeks contact met ons op via de officiële contactgegevens op onze website.

Important: job fraud

Unfortunately, job fraud is becoming more common. Beware of such scams:

• We will never ask for personal information (such as a copy of your ID, bank details, or social security number) via WhatsApp or during a video call.
• If you're unsure whether a vacancy or contact person is legitimate, please reach out to us directly using the official contact details on our website.