I am a Senior Software Engineer with 12+ years of experience delivering scalable SaaS products, cloud-based platforms, and business-critical software across healthcare, fintech, legal tech, and logistics. I specialize in backend architecture, full-stack development, API design, distributed systems, and production cloud infrastructure. I work proficiently with Python, Java, Kotlin, Node.js, React, Next.js, TypeScript, PostgreSQL, MongoDB, AWS, and GCP, translating complex business needs into secure, scalable, and production-ready solutions that improve operational efficiency and platform reliability. I thrive in cross-functional teams and enjoy mentoring others, driving engineering standards, and building reliable, maintainable systems. My approach combines hands-on implementation with thoughtful architecture and collaboration to deliver long-term value for stakeholders and end users.…

Christiaan Water

I am a Senior Software Engineer with 12+ years of experience delivering scalable SaaS products, cloud-based platforms, and business-critical software across healthcare, fintech, legal tech, and logistics. I specialize in backend architecture, full-stack development, API design, distributed systems, and production cloud infrastructure. I work proficiently with Python, Java, Kotlin, Node.js, React, Next.js, TypeScript, PostgreSQL, MongoDB, AWS, and GCP, translating complex business needs into secure, scalable, and production-ready solutions that improve operational efficiency and platform reliability. I thrive in cross-functional teams and enjoy mentoring others, driving engineering standards, and building reliable, maintainable systems. My approach combines hands-on implementation with thoughtful architecture and collaboration to deliver long-term value for stakeholders and end users.…

Available to hire

I am a Senior Software Engineer with 12+ years of experience delivering scalable SaaS products, cloud-based platforms, and business-critical software across healthcare, fintech, legal tech, and logistics. I specialize in backend architecture, full-stack development, API design, distributed systems, and production cloud infrastructure. I work proficiently with Python, Java, Kotlin, Node.js, React, Next.js, TypeScript, PostgreSQL, MongoDB, AWS, and GCP, translating complex business needs into secure, scalable, and production-ready solutions that improve operational efficiency and platform reliability.

I thrive in cross-functional teams and enjoy mentoring others, driving engineering standards, and building reliable, maintainable systems. My approach combines hands-on implementation with thoughtful architecture and collaboration to deliver long-term value for stakeholders and end users.

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Skills

Experience Level

Python
Expert
Docker
Expert
JavaScript
Expert
TypeScript
Expert
PostgreSQL
Expert
Node.js
Expert
Kubernetes
Expert
Java
Expert
Google Cloud
Expert
Django
Expert
AWS
Expert
HTML5
Expert
Express
Expert
MongoDB
Expert
MySQL
Expert
Spring
Expert
SQL
Expert
Kotlin
Expert
Redis
Expert
GraphQL
Expert
API
Expert
Bootstrap
Expert
Elasticsearch
Intermediate
Go
Intermediate
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Language

English
Fluent
Javanese
Advanced

Work Experience

Senior Software Engineer at Best Care
May 1, 2023 - February 28, 2026
Led development of healthcare platforms supporting scheduling, care coordination, administrative workflows, and internal service operations used across multiple teams. Built backend services with Python, Django, and FastAPI to handle workflow automation, reporting pipelines, internal tooling, and service-to-service integrations. Designed secure REST APIs with strong authentication and authorization. Developed responsive internal applications with Next.js, React, TypeScript, Tailwind CSS, and Ant Design for dashboards, scheduling tools, and workflow portals. Implemented backend business logic for scheduling coordination, staff assignments, operational reporting, and process automation. Designed PostgreSQL schemas for scheduling, transactional workflows, and data integrity. Improved performance through query tuning, indexing, and more efficient data-access patterns. Built reusable frontend components and UI patterns to improve consistency and delivery speed. Integrated third-party and in
Software Engineer at Adyen
February 1, 2020 - April 30, 2023
Contributed to secure, high-availability fintech systems supporting merchant operations, internal business platforms, and payment-related workflows. Built backend services with Java, Kotlin, Spring Boot, and Hibernate; designed RESTful APIs and Kafka-based event services for asynchronous workflows, resilient integrations, and distributed communications. Developed internal dashboards and operational interfaces with React and TypeScript for platform and business users. Used PostgreSQL for transactional data and Redis for caching. Deployed containerized services with Docker and Kubernetes; worked with AWS services including EC2, EKS, RDS, S3, IAM, and CloudWatch. Participated in automated testing (Cypress) and CI/CD improvements while collaborating with platform engineering, compliance, product, and operations teams in a regulated environment.
Software Engineer at HSBC UK
August 1, 2016 - January 31, 2020
Built full-stack fintech applications supporting onboarding, account management, document-driven workflows, and guided user journeys. Backend services with Node.js and Express.js; designed REST APIs and frontend workflows; developed form-heavy React interfaces with TypeScript and Material UI. Used MongoDB for flexible document-oriented data models. Deployed on Google Cloud (Compute Engine, Cloud Run) for scalable hosting; utilized Cloud Storage, Cloud Logging, and IAM for assets and secure access. Collaborated with product managers, designers, and engineers to translate complex financial requirements into dependable SaaS functionality.
Software Engineer at DepoIQ
July 1, 2014 - June 30, 2016
Built full-stack applications supporting inventory workflows, operational dashboards, reporting systems, and internal logistics tools. Backend services with Node.js, Express.js, and ASP.NET for APIs, workflow processing, and integrations. Frontend interfaces with AngularJS, JavaScript, and Bootstrap for dashboards and workflow screens. Used PostgreSQL and MySQL for transactional and reporting workloads. Hosted on Amazon EC2 with Amazon RDS for relational databases, S3 for assets, and CloudWatch for monitoring. IAM managed secure access across environments. Collaborated with engineering and product teams to deliver practical logistics solutions.
Backend Engineer at Adyen Netherlands
February 1, 2020 - April 1, 2023
Contributed to secure, high-availability fintech systems supporting merchant operations, internal platforms, and payment-related workflows. Built backend services with Java, Kotlin, Spring Boot, and Hibernate, implementing scalable business logic and APIs. Designed RESTful APIs and Kafka-based event services to support asynchronous workflows and distributed communication. Developed internal dashboards with React and TypeScript for platform and business users. Used PostgreSQL for transactional data and Redis for caching and state handling. Deployed and managed containerized services with Docker and Kubernetes on AWS (EC2, EKS, RDS, S3), with IAM and CloudWatch for security and observability. Participated in automated testing (Cypress) and CI/CD improvements in a regulated environment.
Full-Stack Developer at HSBC UK / Remote
August 1, 2016 - January 1, 2020
Built full-stack fintech applications supporting onboarding, account management, document-driven workflows, and guided user journeys. Developed backend services with Node.js and Express.js, implementing business logic, workflow rules, API integrations, and document-related functionality. Designed REST APIs and structured frontend applications with React, TypeScript, and Material UI for internal operations. Used MongoDB as the primary datastore for flexible document models. Deployed workloads on Google Cloud Platform (Compute Engine and Cloud Run) with Cloud Storage, Cloud Logging, and IAM for secure access and observability. Collaborated with product, designers, and operations to translate complex financial requirements into dependable SaaS functionality.
Software Developer at DepoIQ US / Remote
July 1, 2014 - June 1, 2016
Built full-stack applications supporting inventory workflows, operational dashboards, reporting systems, and internal logistics tools. Developed backend services with Node.js, Express.js, and ASP.NET for APIs, workflow processing, and integrations. Created responsive frontend interfaces with AngularJS and Bootstrap for dashboards and workflow applications. Used PostgreSQL and MySQL for transactional and reporting workloads. Hosted on Amazon EC2 with RDS, S3, and CloudWatch; implemented IAM-based secure access control and deployment workflows. Collaborated with engineering and product teams to deliver practical solutions aligned with logistics and operations.

Education

Bachelor of Science in Computer Science at University of Amsterdam
September 1, 2010 - April 1, 2014
Bachelor of Science in Computer Science at University of Amsterdam
September 1, 2010 - April 1, 2014

Qualifications

Add your qualifications or awards here.

Industry Experience

Healthcare, Financial Services, Software & Internet, Transportation & Logistics, Professional Services
    paper Best Care

    Led the design and delivery of full-stack platform modules using C#, ASP.NET Core Web API, React, TypeScript, SQL Server, and Entity Framework Core to support operational workflows, reporting pipelines, and customer-facing product functionality.
    • Engineered scalable backend services with ASP.NET Core Web API, Entity Framework Core, and LINQ, implementing secure business logic, modular service architecture, and reliable internal and external API integrations.
    • Designed and optimized SQL Server schemas, transactional workflows, and query performance to support high-volume operational processes and reporting requirements.
    • Developed supporting integration services and asynchronous utilities with Node.js and Express.js for webhook processing, background jobs, and external system communication.
    • Built modern frontend applications with React, TypeScript, Redux Toolkit, React Query, and Context API, delivering dashboard interfaces, workflow screens, and internal management tools.
    • Created responsive and maintainable UI layers using Tailwind CSS and Material UI, improving usability, consistency, and scalability across complex application screens.
    • Integrated frontend modules with backend APIs and database-backed services to deliver reliable end-to-end functionality across reporting and workflow-driven features.
    • Improved application performance and maintainability through targeted refactoring and optimization across React, ASP.NET Core, Entity Framework Core, and SQL Server.
    • Supported deployment reliability and production operations using AWS EC2, Amazon RDS, Amazon S3, CloudWatch, and Docker across development, staging, and production environments.
    • Resolved production issues across frontend, backend, API, and database layers, strengthening overall platform stability and reducing recurring incidents.

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