Arnas Mockus

ERP Business Systems Developer

Digital Execution Simplified • Freelance

Jan 2024 - Jun 2026 • 2 yrs 5 mos

Worked as a core ERP Business Systems Developer responsible for designing, building, and optimizing enterprise-level business management systems. My role focused on transforming traditional business operations into structured, automated ERP workflows that improve efficiency, accuracy, and scalability. I was involved in analyzing end-to-end business processes including sales operations, inventory management, accounting flows, procurement systems, and reporting structures. Based on this analysis, I designed ERP modules that unify these processes into a centralized system architecture. A major part of my work involved backend development using Python-based logic to implement business rules inside ERP systems. I built automation workflows that reduce manual input, eliminate redundant tasks, and ensure consistency across all operational departments. I also handled API integrations with external systems such as payment gateways, CRMs, and third-party business tools. This required designing secure data exchange layers, managing authentication flows, and ensuring real-time synchronization between multiple platforms. In addition, I contributed to database structuring and optimization to ensure high-performance data handling across large business datasets. I worked on improving system reliability, scalability, and long-term maintainability. My role also involved direct collaboration with stakeholders to translate business requirements into technical ERP solutions. This included mapping workflows, identifying inefficiencies, and designing system-level improvements that align with operational goals. Through this role, I helped organizations reduce operational overhead, improve process visibility, and transition from manual systems to fully automated ERP-driven environments.

Backend & API Integration Developer

Software Engineering Daily

Feb 2023 - Aug 2023 • 6 mos

Worked as a Backend and API Integration Developer focused on building scalable server-side systems and connecting multiple business platforms through secure and efficient API architectures. My primary responsibility was to ensure seamless communication between different software systems within enterprise environments. I developed RESTful APIs that allowed ERP systems, e-commerce platforms, and internal business tools to exchange data in real time. These APIs were designed with a focus on performance, scalability, and data integrity. A significant part of my work involved integrating third-party services such as payment gateways, CRM systems, and cloud-based business tools. This required implementing authentication protocols, data mapping logic, and error-handling mechanisms to ensure stable integrations. I also worked on backend logic development using Python and JavaScript, optimizing system performance and improving response times for high-load applications. This included refactoring existing codebases and improving architecture structure. Database management was another key area of responsibility. I designed and optimized relational database structures to support efficient data storage and retrieval for enterprise applications. Additionally, I collaborated with frontend developers and system architects to ensure smooth integration between user interfaces and backend services. I actively participated in debugging system issues and improving overall application stability. Through this role, I contributed to building highly connected digital ecosystems that improved operational efficiency and reduced manual data handling across business systems.

Business Process Automation Engineer

Tech & Fix • Freelance

Feb 2022 - Aug 2022 • 6 mos

Worked as a Business Process Automation Engineer focused on identifying inefficiencies in business operations and converting them into automated digital workflows. My role centered on improving operational efficiency through structured automation systems. I analyzed business processes across departments such as finance, inventory, sales, and customer management. Based on this analysis, I designed automation workflows that eliminated repetitive manual tasks and improved process speed and accuracy. I developed automation scripts and backend workflows that handled tasks such as data synchronization, report generation, and system notifications. These solutions reduced dependency on manual input and minimized human error. A key part of my role involved designing structured data flows that ensure information moves correctly between systems. I worked on improving data consistency and establishing reliable automation pipelines across different business functions. I also contributed to ERP system enhancements by improving workflow logic and optimizing existing modules to better support business operations. In collaboration with business teams, I translated operational challenges into technical solutions, ensuring that automation systems aligned with real-world business requirements. Through this role, I helped organizations significantly reduce operational workload, improve efficiency, and transition toward fully automated business environments.