Maximilian Fellner

Technical manager for two full-stack teams in the customer-facing domain of an early-stage e-commerce startup.

Achievements

• Successfully scaled two teams from 4 to 8 engineers by hiring and onboarding.
• Mentored and coached engineers through regular 1-on-1 meetings and by setting personal development objectives. Conducted routine performance reviews with feedback on achievements and improvement areas.
• Developed role descriptions and technical interview process for SDE, SDM, and QA positions.
• Improved team effectiveness by establishing and running agile ceremonies, including dailies, planning meetings, retrospectives, and sprint reviews.
• Set up and supervised mature software lifecycle processes, including, technical writing and architecture documentation with C4-modelling, testing (unit, integration, end-to-end, performance) build- and release-automation, observability, on-call, and incident management.
• Set up end-to-end observability of important service-level indicators to find critical performance bottlenecks in the frontend and backend using Sentry and Cloud Trace.

Projects

• Created dedicated backend for frontend and with a GraphQL API for product search and presentation backed by Elasticsearch. Used InversifyJS to implement an Inversion of Control pattern. Utilized Jest for unit- and integration-testing, K6 for load- and stress-testing. Other technologies used: Google Cloud platform, serverless cloud functions, Pub/Sub, TypeScript.
• Developed Zapp mobile app for Android and iOS with React Native, TypeScript, GraphQL, and Firebase.
• Replication of cloud infrastructure across multiple separated markets and geographic regions with the help of Terraform.

Technical lead of 2 teams working on critical back-office solutions for the bank: one full-stack (TypeScript) and one backend (Kotlin) team.

Achievements & projects

• Responsible for the technical design & architecture of internal web applications and automation systems.
• Established consensus on system design between our team and others by conducting an event storming exercise.
• Instructed other team members as a mentor and coach. Helped them with their personal development by providing feedback in regular 1-on-1 meetings.
• As a hiring manager of the team, responsible for the interview process.

Senior full-stack developer in a team creating the applications for the internal users of the bank.

Achievements & projects

• Designed and developed a micro frontend framework and platform for internal web applications with React, TypeScript, GraphQL, and Node.js.
• Developed an IAM system for web applications with React, TypeScript, and Node.js.
• Developed and maintained multiple Node.js microservices.

Achievements

• Built and maintained microservices using Java, Go, and Node.js, deployed on Kubernetes.
• Designed and developed user interfaces of web application frontends.
• Published technical narratives and guidelines for all technology teams, including the RESTful API and Event guidelines.

Projects

• API Portal, a website to discover API specifications based on Node.js and React.
• API Discovery, a fleet of microservices to collect API specifications written in Java and Go.
• Zally, a linter for OpenAPI (Swagger) REST API schemas, written in Kotlin.

Achievements

• Developed and maintained full-stack web applications deployed on Amazon Web Services.
• Agile and test-driven software development in an autonomous team.
• Maintained the complete product lifecycle including continuous monitoring and troubleshooting.

Projects

• Brand CMS, a content management system for business customers with a RESTful microservice architecture using Java, Angular, and PostgreSQL.
• Tessellate, a server-side webpack bundler and React renderer for Mosaic built with Node.js.
• Zappr, an open-source GitHub integration written in React and Node.js.
• Aggregated and analyzed business data using the SciPy stack, including Pandas.
• Built a prototype for analyzing Kafka-based event data in a Hadoop data lake using Hive queries.

Software Engineering and Management Master’s thesis at the Institute of Software Technology on behavior-driven development and specification by example of visual programming languages.

Software Development and Business Management Bachelor’s thesis at the Institute of Software Technology on the test-driven development of ‘Catrobat‘, a visual programming language for Android.

Specialized in Commerce and Information Technology