Vrajesh Vagadiya

Software Engineer with 5+ years of experience building scalable backend applications, distributed systems, and cloud-native services using Python, PHP, Docker, PostgreSQL, and AWS/Azure. Experienced in designing REST APIs, asynchronous processing, event-driven architectures, and production-grade backend systems. Contributed to distributed systems reliability research at the Max Planck Institute for Software Systems (MPI-SWS), developing deterministic simulation frameworks for large-scale system testing.

Passionate about cloud platforms, automation, AI-enabled engineering, and building reliable developer tools that scale.

Distributed Systems Simulation Framework at MPI-SWS (2025-11 – 2026-05)

• Designed and developed a deterministic Python-based simulation framework for testing distributed systems under controlled failure scenarios.
• Implemented simulated network behavior including latency, packet loss, reordering, and network partitions to evaluate system reliability and fault tolerance.
• Emulated multiple TCP client nodes within a virtual-time environment for reproducible distributed systems experimentation.
• Integrated LocalStack to simulate AWS services (S3, SQS, DynamoDB) for offline development and CI-based testing workflows.

Software Developer at Koinon / TU München (2025-05 – Present)

• Designed and implemented scalable backend services using PHP, Docker, and MySQL for workflow and administration systems.
• Built secure RBAC-based application and approval workflows across multiple departments.
• Optimized database queries and backend workflows to improve performance and concurrent system usage.
• Owned feature delivery from design to deployment within a Dockerized Agile development environment.

Working Student – Software Configuration & Testing at Cogitanda DataProtect (2022-11 – 2025-03)

• Contributed to maintaining 99.5% system reliability standards through structured testing and release validation processes.
• Performed manual, automotive, and configuration testing while documenting reproducible test workflows.

Full-Stack Developer Intern at Prishni (2021-08 – 2022-02)

• Developed and maintained Django backend services and PostgreSQL database systems for production web applications.
• Managed Microsoft Azure deployment and scaling activities for cloud-hosted services.
• Implemented secure Razorpay payment authentication and collaborated with clients in Agile development workflows.

Backend Engineer (Production Systems) at Freelance (2020-05 – 2022-11)

• Architected and developed scalable backend systems using Laravel, Django, PostgreSQL, MySQL, and Docker for recruitment, ticketing, e-commerce, and financial platforms.
• Designed RESTful APIs, JWT authentication, and RBAC systems supporting high-concurrency production workloads.
• Built payment processing systems handling 500+ daily transactions with Stripe Terminal, Razorpay, and PayPal integrations.
• Implemented asynchronous workflows using queues and background jobs, improving payment and notification reliability to 99.8%.
• Optimized database indexing and query performance for platforms supporting 1000+ concurrent users.

M.S. in Computer Science – Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau (2022-04 – 2026-08)