Johan

Advising on all things software and infrastructure as well as performing R&D for projects.

NjiaPay is a Payments-as-a-Service company, focused on helping African merchants manage and process payments in a smarter and more seamless way. - Integrated the platform with African payment service providers. - Ensured smooth daily operations. - Liaising with stakeholders. - Developer dashboards for reporting.

- Architected and implemented a scalable and reliable backend systems, ensuring seamless gameplay experiences. - Collaborated closely in a cross-functional team, including game designers and frontend developers, to align technical decisions with the overall vision and objectives of a location based mobile AR game. - Defined the technical roadmap, making strategic decisions on technology stack, infrastructure architecture, and scalability plans. - Implemented best practices and coding standards, ensuring the security, performance, and maintainability of the backend system. - Proactively identified and resolved technical challenges. - Worked closely with product stakeholders to prioritize and execute new features and enhancements, driving continuous improvement and innovation.

Ensured optimal user experiences through seamless integration of backend and frontend components. - Contributed to the development and launch of Sket's legaltech-as-a-service platform. - Built a Node.js and Vue.js platform for their legaltech-service offerings. - Implemented best practices for performance, scalability, and security. Conducted thorough testing, debugging, and code reviews to ensure stability and code quality. Contributed to a collaborative work environment and continuous improvement.

- Responsible for backend development for pilot version of internal tool using Node.js on AWS Lambda with DynamoDB. - Collaborated closely with frontend team, ensuring seamless integration. Optimized performance and scalability, delivering reliable backend system. Gathered requirements, translated into technical solutions. Successfully delivered pilot version on time and met project objectives.

- Contributed to ongoing development of health activation software for incentivizing employee health. - Used Ruby on Rails, React, and PostgreSQL for backend, frontend, and database respectively. - Collaborated with cross-functional teams to deliver user-centric features and enhancements. Developed robust APIs, intuitive user interfaces, and ensured data integrity. Conducted thorough testing and actively participated in code reviews.

Co-founded and served as the CTO of Beatflirt, a cutting-edge music intelligence service aimed at delivering personalized and humanized discovery recommendations. Developed a tech stack utilizing a combination of Python, Node.js, Tensorflow, Amazon DocumentDB, and Amazon RDS. Leveraged AWS architecture, with a primary focus on AWS Lambda and EC2 instances, to ensure scalability and reliability. Implemented innovative algorithms and machine learning techniques to analyze user musical influences and behavior for more relevant recommendations.

- Software developer for start-up owned by a Fortune 500 corporation. - Developed APIs using Node.js, PostgreSQL, and Express on Heroku. - Worked on core platform of a mobile app for receipt scanning and discounts.Contributed to CMS development using React. - Proposed and began implementing microservice architecture and log handling. - Ensured seamless integration and optimal performance. - Demonstrated problem-solving skills and met project deadlines.

- Contributed to the development of largest online job boards in the Netherlands, including Nationale Vacatuurbank and Intermediair. - Worked on frontend development using AngularJS. - Built a new frontend to transition from an old monolithic codebase to a thoroughly tested and easily maintainable codebase. - Ensured seamless integration and functionality across both sites.

Established IT strategy and developed Node.js backend with MongoDB for a leasing platform.Catered to small and medium enterprises, streamlining equipment leasing processes.Ensured high-quality code and met project timelines.

- Collaborated with the founder to define strategy and roadmaps for the company. - Developed a robust API in Go, utilizing a MySQL datastore for efficient data management; Implemented best practices for scalability, security, and performance. - Developed a cross-platform mobile app using Ionic framework and a web app using AngularJS. - Played a key role in driving the company's technical vision and innovation.

Contributed to a scrum team at Coolblue, the largest consumer goods e-commerce player in the BeNeLux area. - Developed a new Node.js API as part of the transition from a monolithic platform to a modular and scalable architecture. - Collaborated with the team to lay the foundation for enabling mobile apps and improving system flexibility. - Actively participated in sprint planning, code reviews, and team discussions to deliver high-quality code.

Worked as an independent consultant with clients across diverse industries, including e-commerce, online gaming, mobile payment solutions, and fintech. Provided expertise and guidance on various technologies, including MySQL, PostgreSQL, Ruby on Rails, Sinatra, Python, and PHP. Collaborated closely with clients to identify and implement effective solutions tailored to their specific needs. Delivered successful projects and contributed to the growth and success of clients in multiple industries.

Part of a 3-member DBA team managing a large MySQL environment across continents and countries. Responsibilities included automation, backup strategy and planning, and systems architecture.Ensured high availability, performance, and data integrity for the platform.

Undisclosed

- Contributed to the administration of LAMP servers at Webhallen, a major consumer goods e-commerce site in Sweden. - Developed internal tools using PHP for improved operational efficiency. - Worked on feature development for the e-commerce system using PHP.

- Transferred old Fortran code to C# as part of a modernization initiative. - Led the migration of the company's CAD environment from HPUX to a Windows Server-based 3D CAD system. - Ensured seamless integration and functionality across the updated software and platforms.