FullTime with Benefits

Freelance Software Engineer

SThree · Amsterdam

Contract · Posted on 27 October 2026 · Open until 26 December 2026

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We are looking for an experienced Software Engineer II to join a high-performing backend engineering organization focused on building and evolving a large-scale attractions and reservations platform. The team is currently working on a strategic migration initiative, platform modernization, and prototyping new service architectures to support future growth.

You will join one of the core backend teams responsible for catalogue, reservations, or connectivity services and contribute to the design, development, and operation of highly scalable distributed systems.

Responsibilities

Build and maintain scalable backend applications using Java

Drive migration initiatives from on-premises environments to AWS

Design and implement cloud-native solutions leveraging AWS managed services

Develop reliable and maintainable services with strong testing practices

Participate in system design discussions and architectural decisions

Monitor production systems and improve operational excellence

Own services end-to-end, including deployment, monitoring, and incident resolution

Collaborate with Product Managers, Engineers, and stakeholders to deliver business value

Continuously improve system reliability, performance, and maintainability

Contribute to technical documentation, operational procedures, and best practices

Required Skills

5+ years of software engineering experience

Strong Java development experience

Extensive AWS experience

Proven experience with on-premises to AWS cloud migrations

Hands-on experience with Kafka

Hands-on experience with Cassandra

Experience with AWS managed services such as DynamoDB, RDS, and Lambda

Strong understanding of monitoring, alerting, observability, and operational excellence

System design experience

Excellent communication skills

High accountability and ability to work autonomously

Nice to Have

TypeScript or JavaScript experience

Experience within Attractions, Ticketing, Travel, Reservations, or Marketplace environments

Greenfield architecture and product design experience

Details

Start: Asap

Duration: 6 months (+)

Location: Amsterdam, Hybrid

Let op: vacaturefraude

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  • 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

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  • 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.

Original posting: www.sthree.com

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