Hey, I’m Luis, a software developer and tech enthusiast based in Germany - Karlsruhe. I’m one of the lead developers at OneCalendar, where we strive to build software that empowers the digitalisation of businesses.

Skills

My skillset is quite extensive, encompassing Fullstack Web Development, Software Architecture, as well as Data Integration & Migration Projects. With this broad range of expertise, I’m well-prepared to handle a variety of projects and provide holistic solutions.

Software Development

During my time at OneCalendar I was able to solidify my knowlege as a software developer. This continuous commitment allowed me to deepen my expertise with Node.js, Typescript, React and a lot of other frameworks, languages and tools.

Software Architecture

I dedicated my efforts to building expertise in software architecture. This concentrated focus enabled me to develop a deep understanding of architectural principles and best practices in software design.

Integration & Migration

My time at DIGITALL allowed me to gain experience in the field of integration and migration projects. I was able to work with a variety of tools and technologies, such as MuleSoft, Talend, Salesforce and many more.

Work

  1. Company
    Salesfive Integration Services
    Date
    1. Role
      Senior Integration Consultant
      Date
      • MuleSoft
      • SAP
      • Salesforce
      • Business Central
      • API-led Connectivity
      Show details

      Supporting enterprise clients in planning and implementing large-scale MuleSoft integration solutions – from requirements through go-live, with a focus on technical delivery and client collaboration.

      • Implementing integrations across SAP, Salesforce, Business Central (18+ instances) and various SaaS systems, handling tens of millions of events per year.
      • Developing integration concepts and architectural recommendations aligned with API-led connectivity principles.
      • Contributing to pre-sales with technical feasibility assessments, effort estimations and proposal support.
      • Reduced annual transaction volume from 30M+ to under 22M events through targeted optimization.
    2. Role
      Integration Consultant
      Date
      • MuleSoft
      • Salesforce
      • SAP
      • SFMC
      • MUnit
      Show details

      Delivered MuleSoft integration solutions for clients in manufacturing, healthcare and services – from requirements workshops through go-live and production monitoring.

      • Built and deployed integration flows connecting Salesforce, SAP, Planisware, CrossEngage and SFMC, handling tens of millions of events per year.
      • Conducted technical discovery workshops, translating business processes into interface specifications.
      • Ensured production stability through MUnit testing, monitoring and proactive issue resolution.
      • Mapped cross-system processes to identify integration gaps and expansion opportunities.
  2. Company
    OneCalendar
    Role
    Co-founder | Full Stack Developer | DevOps Engineer
    Date
    • React
    • TypeScript
    • Node.js
    • GraphQL
    • MongoDB
    • Redis
    • CI/CD
    Show details
    • System architecture: designed and implemented the architecture of all systems, including a monolithic backend and multiple frontend microservices, built for scalability and reliability.
    • Development & operations: managed the development systems including databases (Redis, MongoDB), servers and CI/CD pipelines.
    • Requirements analysis: translated business needs into technical specifications and actionable development plans together with the team.
    • Full-stack development with React, TypeScript, Node.js, REST and GraphQL.
    • Testing and quality assurance to keep code quality and performance high.
  3. Company
    DIGITALL
    Date
    1. Role
      Consultant
      Date
      • Talend
      • Migration
      • Pre-Sales
      Show details
      • Integration and migration projects with Talend for on-premise and cloud-based SaaS systems, ensuring data consistency across platforms.
      • Customer workshops and requirements analysis, translating business needs into technical solutions.
      • Pre-sales support with project estimations and technical insights.
    2. Role
      Junior Consultant
      Date
      • Talend
      • Migration
      • Data Mapping
      Show details
      • Integration and migration projects with Talend for on-premise and cloud-based SaaS systems, ensuring data consistency across platforms.
      • Conducted mapping workshops with customers to prepare data integration and migration projects.
    3. Role
      Dual Student
      Date
      • Talend Open Studio
      • Java
      Show details

      Practical phases of my dual study programme, focused on data integration with Talend Open Studio and Java.

  4. Company
    ec4u
    Role
    Dual Student
    Date
    • Talend Open Studio
    • Java
    Show details

    Practical phases of my dual study programme, working on my first data integration projects with Talend Open Studio and Java.

Working with beloved technologies and tools

Java
Typescript
Node.js
Spring
React
Next.js
MongoDB
MySQL
PostgreSQL
Redis
Talend
Mulesoft