Köln, Germany
Bruno Pessanha
Senior Backend Engineer & Team Lead building scalable, Cloud-Native Systems for IoT and enterprise platforms.
Köln, Germany
Senior Backend Engineer & Team Lead building scalable, Cloud-Native Systems for IoT and enterprise platforms.
About
Experienced Software Engineer and former Team Lead with comprehensive proficiency in Software Development, Software Lifecycle Management, and Cloud Infrastructure.
I've led high-performing engineering teams and architected scalable, modular Backend systems using modern technologies like Kotlin, Spring Boot, Kubernetes, and Terraform — always with a focus on customer-centric, efficient solutions and agile practices.
With roots in Brazil and professional experience across South America, the UK, and Germany, I bring a global perspective and a strong track record in cross-functional collaboration, from early-stage MVPs to mature cloud-native services.
Experience
Skills
Projects
Cloud-based building automation platform for lighting control and facility management, enabling location-independent planning, configuration, and commissioning of smart building systems. Contributing Backend features in Kotlin, evolving the product from MVP to mature service.
Gamification app integrated into the Vodafone employee platform, enabling 40,000+ employees to track and reduce their personal CO₂ footprint through daily missions over a 9-week campaign. Delivered as a Backend service on Azure using Kotlin and Spring Boot.
SaaS print-buying marketplace connecting businesses with a nationwide UK network of vetted manufacturers. Features real-time pricing quotes, order tracking, carbon-balanced print options, and consolidated billing. Contributed to the core ASP.NET stack and introduced Web API and MVVM patterns.
Document management system for Registration Authorities, accelerating digital certificate validation. Led development and handled client requirements directly.
Document management system for Certification Authorities, managing Registration Authority accreditation workflows. Built as sole developer.
Web application for a law firm to manage clients, documents, legal processes, and appointments. Built and maintained as sole developer.
Prepaid card payment platform for private school students, including PagSeguro integration for card issuance, renewal, and top-ups.
Generic access control service, rebuilt from scratch with a modern stack introducing Web API and MVVM patterns to the team.
Vehicle tracking and monitoring system operating over both cellular and satellite networks, serving fleet operators across Brazil.
IoT smart lighting control platform for BEGA, one of Germany's leading architectural lighting manufacturers. Contributed to Backend services as part of the grandcentrix IoT engineering team.
Cloud-connected WLAN gateway enabling remote and voice-controlled operation of Hörmann garage and driveway doors via Alexa, Google Assistant, and Apple Home. Contributed to Backend services as part of the grandcentrix IoT engineering team.
Brazil's leading digital signature platform by Certisign, processing 1.4M+ document signings monthly for 100,000+ users across the Americas. Worked as maintainer fixing bugs and ensuring platform stability.
Highlights
Introduced shared libraries for authentication, authorisation, and logging, plus reusable plugins — enabling new Backend projects to onboard with minimal friction.
Chose a modular monolith approach to simplify product development and long-term maintenance, striking the right balance between scalability and operational simplicity.
Led full recruitment and onboarding cycles, achieving over 90% employee retention within a high-performing engineering team at a Vodafone company.
Delivered a product from MVP to mature service by coordinating a Scrum team, managing the technical backlog, and aligning stakeholders on roadmap priorities.
Replaced OAuth identify solution for an open source one. Compared available options and decided for a self-hosted solution, optimizing costs and decreasing the dependency on external services.
Contact
Whether you have a project in mind, want to talk engineering, or just want to connect — feel free to reach out.