Amazon SNS Experts in Berlin

• Designed, built, and launched an internal event planning web application used by over 100 department leads for a large event, despite having no dedicated testing phase.

• Ensured smooth, failure-free operation during first production use, leading to the tool being adopted for future events.

• Automated catering calculations and related workflows, significantly reducing email communication and manual computation effort for meal planning.

• Managed deployment and hosting on a Linux server using Coolify, including application setup and runtime operations.

• Hired and guided a communication designer on UX while independently owning all technical decisions and implementation.

• Creation, maintenance and hardening of Kubernetes clusters employing Ansible and ArgoCD
• Keywords: Ansible, AWX, Kubernetes, NetApp, Prometheus, CI/CD ArgoCD, SSO, Fluent-bit, HAProxy, Calico, Keycloak, oauth2-proxy, SealedSecrets, kubeseal, Aqua kube-bench, CIS-Benchmarks, Aqua Trivy operator

• Drive migration of enterprise authorization platform from Styra DAS to open-source OPA via Skipper (Zalando's Golang-based ingress proxy) integration
• Optimise k8s resources and integrate native Prometheus metrics with OPA
• Migrate from internal monitoring solution to Prometheus CRs + Dash0

Tech Stack: Java/Kotlin, Golang, Python, Spring Boot, AWS, Kubernetes, Docker, OpenTofu, Prometheus, Grafana

• Consulting an NGO in the field of data center sustainability in publicly funded projects (BMUKN with NADIKI and Umweltbundesamt with SIEC)
• Development of Python APIs and web applications, deployment on AWS/ECS with Terraform
• Collecting power consumption metrics for servers, CPUs, GPUs running AI workloads
• Technologies used: AWS, EC2, ECS, Fargate, CloudMap, VPC, Route53, Lambda, EventBridge, CodeBuild/CodePipeline/CodeDeploy, Terraform, Docker, Linux, Bash scripting, Python, Flask, SQLAlchemy, SQL, MariaDB, InfluxDB, Telegraf, Prometheus, Zabbix, Kubernetes, Letsencrypt, certificate management

• Bootstrapping a CloudOps team and building a multi-cloud provider backend for a low-code Internal Developer Platform (IDP) with env zero

• Introducing user story mapping, ADRs, milestones, and backlog management

• Designing and developing core APIs, setting up CI/CD pipelines, OpenTofu/Terraform scripts

• Representing and communicating the team with third-party stakeholders (e.g. env zero)

• (Cross-)team coaching on DevOps, software design, Terraform, Golang, and agile practices

• Developed a Proof of Concept for distributed tracing using OpenTelemetry within a microservices architecture, enhancing system observability and reducing mean-time-to-resolution for issues.
• Built and maintained backend services using Java and Spring Boot, ensuring high reliability and performance for payment transaction workflows.
• Implemented comprehensive automated testing with JUnit and Mockito, achieving 95% test coverage to ensure code quality and maintainability.
• Gained insight into payment transaction workflows, validating end-to-end system reliability and gaining domain knowledge in financial processes.
• Tech used: Java, Spring Boot, Microservices, REST API, Kafka, Grafana, Datadog, Docker, MongoDB

• Led the implementation of a critical backend initiative for the offer teasing feature, resulting in a 10% increase in users actively seeking counter offers.
• Contributed to high-impact features such as instant advice, customer ratings, and automatic contract switching, leading to increased user engagement and conversion rates.
• Built a gRPC service to integrate internal systems with the ERP platform, improving the reliability and observability of data exchange.
• Refactored parts of the legacy Ruby codebase into a more maintainable and scalable Elixir-based architecture.
• Delivered a greenfield project from concept to production on a new stack, integrating with internal services and managing infrastructure setup and deployment.
• Collaborated closely with the front-end team, product managers, and cross-functional team members to ensure the seamless integration of backend features, fostering effective communication and collaboration across disciplines.
• Stack: Ruby, Ruby on Rails, Elixir, OTP, Phoenix, REST, GraphQL, gRPC, PostgreSQL, AWS, Cognito, Lambda, SNS, SQS, Terraform, Helm, Docker, CI/CD, Grafana, Prometheus, Git, Agile Methodology.

• Built a warehouse native customer data platform from scratch
• Successfully onboarded the first customer
• Built the first engineering team of 3 engineers
• Raised 1M€ in venture capital

• Development of React.js / Next.js web application, displaying live sensor data and optimized routes on interactive maps.
• Architected and managed Node.js backend services in Docker containers integrated with Kafka, responsible for order management and routing.
• Guided and supported junior developers in their professional growth as team lead developer.
• Technologies: node.js, React, TypeScript, Postgres, Docker, Kafka, Github CI, ArgoCD

• Delivered MVP for strategic enterprise client including core Links banking APIs and interest rate calculations
• Integrated German banking APIs for automated credit checks
• Built lead distribution system that improved sales team efficiency by 40%
• Developed microservices architecture for mortgage offer generation from multiple banks
• Automated document verification process for customer KYC and income validation
• Implemented GDPR-compliant consent management for customer data protection
• Deployed and managed services using Kubernetes with custom YAML configurations
• Wrote comprehensive test coverage using Rspec ensuring code reliability
• Reduced customer onboarding time by 30% through workflow optimization

• Founded eudaiTec UG in 2021 and GmbH in March 2022
• Founded eudaiTec Private Limited, India in 2022
• Architected and developed the serverless and microservices-based application meetUs (React Native, Serverless Framework, AWS Lambda, AWS DynamoDB, AWS SNS & SQS)
• Conducted requirements engineering, pre-prototyping and concept development for the web application Trustbuilder
• Developed the cross-platform app conneo (React Native)
• Provided IT consulting for ERP rollout project management (end-to-end testing)
• Provided IT consulting for infrastructure setup at WvSC

• Developed backend systems for the DWS Investment App, a white-label investment solution (robo-advisor), and an investment solution for institutional clients.
• Java 8-17, Kotlin, Spring Boot, Spring MVC, OpenAPI 3.0, JPA, JDBI, Oracle, Hazelcast, JXLS, Apache POI, Apache PDFBox, Apache Kafka & Avro, Active MQ, Elasticsearch, React Native, Spock Test, IntelliJ IDEA, Kubernetes, Helm, Microservices/Netflix-Stack, TeamCity, Splunk.
• Kanban team, continuous integration.
• Migrated existing applications from Deutsche Bank's private cloud environment to Azure as part of a carve-out.