Reactive Architecture: Reactive Microservices

Principles of Reactive Architecture

Reactive Architecture: Building Scalable Systems

Reactive Architecture: CQRS & Event Sourcing

Reactive Architecture: Distributed Messaging Patterns

Reactive Architecture: Domain Driven Design

Building Scalable Systems

Docker for javascript/Node.Js Developers

Lightbend Reactive Architecture: Advanced

Responsible for rewriting legacy .NET standard monolith to .NET Core microservices architecture.
Improved deployment speed and delivery with smaller components.

Senior Software Engineer

As Lead Senior Software Engineer at Sispro Software Empresarial, I played a key role in building and maintaining SAAS applications and fostering developer growth.

Key attributions:

• Built and maintained SAAS applications serving thousands of users across the country using Java, .NET, Low Code tools, and introducing public clouds to the organisation, demonstrating experience with SAAS development and cloud adoption.
• Increased the customer base by over 200 new business customers with SAAS applications, highlighting a direct impact on business growth.
• Increased developer experience and development speed by creating libraries, frameworks, and implementing good practices for over 60 engineers, showcasing mentorship and process improvement skills.
• Managed and led multiple teams with over 25 engineers and testers, indicating significant team management experience.
• Demonstrated leadership and team management, mentoring and coaching of engineers, and communication in introducing new 

Senior Software Engineer Technical Lead

Increased the B2B customer base with 20+ new customers with a SAAS application.
Responsible for leading, designing, and implementing a SAAS financial application.
Designed and implemented whole Financial ERP Modules.
Designed and implemented a Point-of-Sale desktop application.

As a Software Engineer contractor within Agibank, I was focused on building a B2C lead enrichment CRM system and driving the adoption of modern technologies.

Key attributions:

• Built a B2C lead enrichment CRM system providing more than 5,000 monthly leads into CRM, using Event Source architecture, demonstrating experience with CRM systems and event-driven architectures.
• Increased the lead enrichment throughput using Kafka, event-driven and event sourcing from 10/s to more than 100/s, highlighting significant achievements in system scalability and performance.
• Led the creation of a CRM application, scalable for 4k+ employees and over 5 million customers, increasing employee assertiveness in offering products by more than 50%, showcasing the ability to build large-scale applications and impact business metrics.
• Helped the bank adopt Kubernetes, Docker, Grafana, Elastic, a DevOps and monitorability mindset, indicating a proactive role in technology adoption and improving developm

During his tenure as Senior Software Engineer contractor within Quby, I was focused on integrating with smart thermostat devices and leveraging data analytics.

Key attributions:

• Built Java REST APIs to integrate with Smart Thermostat devices.
• Enabled data consumption and saving using data analytics on top of Python and Pandas, demonstrating skills in API development and data analysis.
• Offered useful insights about energy for over 500k customers in the Netherlands to reduce thermostat application turnover by 20%, showcasing the ability to translate technical work into tangible business value.
• Coached developers in Java and Spring, increasing quality, test coverage, and developer experience, indicating mentoring and knowledge-sharing abilities.
• Built models using Python and Pandas, consuming gigabytes of data to analyse customer energy consumption and offer efficient insights, highlighting expertise in data modelling and big data.
• Demonstrated coaching and mentoring of othe

Developed Accounting and Inventory systems for large Hospitals and Clinics.
Developed a system for PDA using Windows mobile and Web Services SOAP and REST responsible for hospital inventory control.

Software Engineer

As a Software Engineer contractor within Sicredi, I was responsible for the development of a bank risk management system, demonstrating leadership in a contracting role.

Key attributions:

• Built a model to analyse customers' financial risk, giving users 15% faster insights into CRM, demonstrating skills in risk assessment and performance improvement.
• Created Java REST APIs, React front-end, ETLs, and data scraping routines in Python and Pandas, showcasing a full-stack development capability and experience with data processing.
• Led a team responsible for BE and FE applications for the new bank risk management system, indicating team leadership and project ownership.
• Implemented service-oriented architecture to analyse customer risk, increasing batch processes performance by more than 80%, highlighting expertise in system architecture and performance optimisation.
• Demonstrated team leadership and project management.

Increased developer experience and development speed by creating libraries, and frameworks, and implementing good practices.
Responsible for researching and implementing company-wide libraries and frameworks.
Successfully implemented Outsystems platform.

Built financial and storage management applications for large industries.
Created several applications and components with Visual Basic and .NET C#.
Migrated legacy applications developed in VB6 to .NET C#.

As the Lead Software Engineer at ING, I am instrumental in building and supporting Java APIs and React front-ends for B2B features.

Key attributions:

• Building and supporting Java APIs and React front-ends to handle B2B features.
• Successfully built a whole permission check system for large companies using event-driven architecture in Java.
• Achieved significant performance improvements by splitting applications into 12 containerized APIs, resulting in 35% fewer resources and 50% more requests, demonstrating a focus on performance optimisation and architectural design.
• Leading cross-functional teams to build business banking features, with a focus on delivering 2-3% features every sprint, showcasing team leadership and project management skills.
• Leading team adoption of LLMs and AI dev tools to increase throughput, highlighting a proactive approach to innovation and improving developer productivity.
• Demonstrated leadership in guiding teams and driving technology adoption and

Lead Senior Software Engineer

Engineer with 17+ years in Java, 10+ years in Databases, 8+ years in Spring, and 5+ years in React experience.

Know about Allan Weber's work experience, education, bootcamps, certifications, and much more. Allan Weber