Summary
✨ AI‑Generated
We need an experienced freelance backend engineer for a six‑month engagement to help build and maintain critical integrations for subscription, billing, and identity systems. Responsibilities include designing reliable event‑driven workflows, developing services in Java and Kotlin on cloud infrastructure, and ensuring observability and idempotency. Proficiency in Spring Boot, cloud platforms, and integration technologies is required. Familiarity with identity management and enterprise systems is advantageous.
Highlights
Contribute to critical backend integrations for subscription, billing, and identity, use modern stack (Java/Kotlin, AWS, Kubernetes), work on event‑driven workflows, flexible freelance contract, collaborate with experienced team.
Description
VACATURE
Java developer | Freelance
Amsterdam
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Intro
Wat vragen wij
Vacature
Job descriptionDo you like solving complex backend problems where reliability really matters? We are looking for an experienced freelance backend engineer to join the Java Engineering Chapter at Company.info for a period of six months.
You will work on the systems that connect customer onboarding, billing, finance and identity.
The focus is on reliable integrations and event-driven workflows where correctness, idempotency and observability are critical.
You'll help build and improve the services and integrations that power our subscription, billing and identity landscape.
What you will do
As a Senior Backend Engineer, you will design, build and operate production-grade services and integrations.
You will:
Build durable workflows in Temporal and design reliable event-driven integrations
Develop Spring Boot services in Java and Kotlin on AWS and Kubernetes
Integrate with Keycloak, Salesforce, SAP and our billing platform
Own what you ship, including testing, monitoring, documentation and production readiness
Contribute to architecture decisions, code reviews and knowledge sharing
Our tech stack
Java 21, Kotlin, Python
Spring Boot, Temporal
MySQL, PostgreSQL
AWS (EKS, EventBridge, SQS, S3)
Kubernetes, Helm, Terraform, GitLab CI
Keycloak
Grafana, OpenTelemetry, Micrometer
JUnit, Testcontainers, LocalStack
Culture and team
You will work alongside Java and Golang engineers in a multicultural environment, collaborating closely with Product, Finance and Commercial Operations.
Knowledge sharing, code quality and operational excellence are central to how we work.
Our working language is English, and Dutch is not required.
The assignment
Duration: 6 months, with the possibility of extension
Hourly rate: TBD
Start date: ASAP
Location: Amsterdam (hybrid), 2 days per week on-site
Availability: 32-40 hours per week
What you bring
7+ years of backend development experience with Java
Strong Spring Boot and REST API design skills
Experience with event-driven systems, messaging, retries and idempotency
Solid SQL and relational database skills
Production experience with AWS and Kubernetes
Ability to translate business processes into technical solutions
Strong communication skills in English
Nice to have: Kotlin, Keycloak, OAuth2/OIDC, Salesforce, SAP, billing or subscription platforms.
Diversity
At Company.info, we believe diverse backgrounds, perspectives and experiences make us stronger.
We encourage applications from all backgrounds.
A social media check is part of the selection process.
About Company.info
Company.info is a leading Dutch business intelligence provider.
We collect, manage and deliver company data and insights that help organizations make better decisions in areas such as market research, risk assessment and business development.
Robin Ekholm
Corporate Recruiter
robin.ekholm@fdmediagroep.nl
06 1515 4171
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