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Roger Paul Rodriguez Salazar

@rogerpaulrodriguezsa

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Senior Backend Engineer at Jimdo building Kotlin order-to-cash services for SaaS payments and subscription billing.

Spain

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At Jimdo GmbH, I designed and developed the Order-to-Cash service for a SaaS website platform, covering customer orders, payment processing, subscription billing, and dunning. I built it with Kotlin and Spring Boot as an integration layer between Zuora, Stripe, and internal microservices, using asynchronous messaging on AWS SNS/SQS.

Previously, I designed and built card issuing, payments, KYC, identity, and authentication microservices at ViaBill, applying Domain-Driven Design and hexagonal architecture. Across fintech, payments, and other domains, I’ve also worked on integrations, production monitoring, and technical mentoring.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Jimdo GmbH

Oct 2023 - Present (3 years 1 month)

Designed and developed the Order-to-Cash service for a SaaS website platform, including customer orders, payment processing, subscription billing, and dunning. Architected as an orchestration and integration layer between billing providers and internal microservices using hexagonal architecture and asynchronous messaging.

Kotlin Spring Boot PostgreSQL AWS SNS SQS Kubernetes OpenAPI Test Containers Grafana Prometheus OpenTelemetry Zuora Stripe NodeJS React Claude Code

Staff Software Engineer

CommerceHub

Jul 2023 - Oct 2023 (3 months)

Migrated the Orderstream navigation microservice from self-hosted infrastructure to AWS, and maintained build and testing tooling. Supported a Java monolith backed by SQL Server.

NodeJS React Java S3 SQL Server

Senior Full Stack Engineer

Ximedes

Feb 2022 - Jun 2023 (1 year 4 months)

Delivered new features and improvements across backend and frontend of the EMS merchant onboarding platform. Built integrations with Elasticsearch, AWS S3, SFTP, and external providers.

Kotlin Spring Boot PostgreSQL React Material UI Elasticsearch S3 SFTP TeamCity

Technical Leader

ViaBill

Feb 2019 - Feb 2022 (3 years)

Provided technical leadership and mentoring for the backend team of a high-growth Buy Now Pay Later fintech. Designed and built microservices for card issuing, payments, KYC, and identity, applying DDD and hexagonal architecture.

Java Kotlin Spring Boot OpenAPI AWS Amazon EKS SQS SNS S3 DynamoDB MariaDB ActiveMQ Kubernetes Docker Gitlab CI Grafana Splunk Angular Go NodeJS

Senior Software Engineer

Fon Technology

Apr 2018 - Jan 2019 (9 months)

Built the Home WiFi backend, a distributed Java microservices platform for monitoring and managing home-router devices over MQTT. Implemented services in Vert.x and deployed on AWS ECS.

Java Kotlin Spring Boot Netflix OSS Components Vert.X MQTT RabbitMQ MongoDB Hazelcast Docker AWS ECS Jenkins Gitlab CI

Integrations Specialist

Emerald Associates

Apr 2017 - Dec 2017 (8 months)

Maintained and improved Java integrations with Oracle Primavera P6 and built a Kotlin tool to migrate and integrate data into Zoho CRM.

Java Kotlin Oracle Primavera P6 Zoho CRM

Technical Leader

E-Saurio

Nov 2016 - Apr 2017 (5 months)

Designed and led My Skin Advisor 2.0 for Unilever Asia, including an Android app, Java backend, and Angular admin site deployed on AWS. Designed REST APIs secured with JWT and a proprietary data-synchronization algorithm.

Java Android Angular AWS REST APIs JWT PostgreSQL

Senior Software Engineer

EPAM Systems

Apr 2014 - Apr 2016 (2 years)

Built new functionality for Crescent, the financial market risk platform of UBS, and provided production support and release coordination.

Java Guice Oracle

Senior Software Engineer

Dridco

Jan 2013 - Mar 2014 (1 year 2 months)

Developed features and search for ZonaProp, a leading Latin American real-estate portal, and performed code reviews and mentoring of junior developers.

Java Spring Framework Solr