Devika Arun | Portfolio

Professional Experience

Feb 2023 – Jan 2024

Led technical design and implementation of large-scale backend systems in Python and Go using advanced concurrency and performance optimization techniques.
Architected and maintained CI/CD pipelines in GitLab DevOps with YAML-based templates, standardizing deployments across dev, test, and production environments.
Automated system provisioning and configuration using Ansible, increasing deployment consistency and reducing manual intervention.
Managed cloud infrastructure across Azure, AWS, and GCP, supporting scalable deployment, monitoring, and disaster recovery.
Developed custom ETL job pipelines integrating Azure Blob Storage and Databricks, automating data validation, job scheduling, and deployment via Python.
Configured network security (routers, firewalls, VPNs, IPsec) and enforced secure Linux system practices.
Utilized Wireshark for advanced network traffic analysis, diagnostics, and troubleshooting in both production and development environments.
Enhanced an internal custom SIEM system using open-source tools, boosting threat detection and real-time analysis.
Mentored junior developers, participated in code design reviews, and contributed to cross-team collaboration and knowledge sharing.
Engaged in AI/ML experimentation and integrated simple AI models into automation workflows and existing systems.
Worked with embedded Linux, creating monitoring tools and diagnostics in C and Go, and performing low-level system profiling and debugging.

Nov 2020 – Jan 2023

Designed and implemented scalable backend services in Go, focusing on high-performance data processing using goroutines and channels
Led development of modular and testable Python/Django applications, improving system flexibility and maintainability.
Built microservices for real-time log parsing and event correlation, enhancing security monitoring speed and accuracy.
Developed dashboards and monitoring tools for both operational and security analysis.
Automated testing and validation using Pytest, reducing bugs and increasing code quality.
Integrated external systems (SIEM, NAC, Firewalls) using REST APIs for smooth interconnectivity.
Created shell scripts to automate recurring tasks, system checks, and error detection routines.
Implemented deployment pipelines and unit testing within CI/CD using GitLab DevOps.
Maintained and debugged legacy Python scripts for SQLite3 data ingestion and system resource analysis.
Participated in code reviews, agile sprints, and collaborated across teams to meet product timelines and quality standards.
Gained experience in virtualization with KVM/VMware and hands-on work in networking, including TCP/IP, VPNs, MPLS, and subnetting.

Jun 2017 – Nov 2019

Developed responsive web interfaces using HTML, CSS, JavaScript, jQuery, and Bootstrap, enhancing cross-browser user experiences.
Implemented and maintained back-end logic using Python and Node.js, with data storage in MongoDB and other NoSQL systems.
Practiced secure coding techniques, with attention to session management, data privacy, and application performance.
Utilized Git for version control and implemented CI/CD pipelines to support frequent and stable deployments.
Conducted unit and integration testing, contributing to software reliability and reduced post-deployment issues.
Documented software specifications, including functional and non-functional requirements such as availability, performance, and security standards.
Performed regular website audits for content accuracy and system functionality to ensure optimal performance.
Led a team of 10 developers, increasing office revenue by 200% within nine months, accounting for 20% of the company’s total revenue.
Promoted within one year for outstanding performance and leadership, accelerating my career trajectory.
Applied basic SEO principles to improve website visibility and search engine performance.

May 2014 – Mar 2015

HTML5, CSS3, Bootstrap, and responsive design best practices
JavaScript, AJAX for interactive web applications
Cloud platforms: Azure, AWS, Google Cloud Platform (GCP)
Strong understanding of mobile-first and responsive design approaches
Programming languages: Python, Go (Golang), Node.js, C, C++, Java
Frameworks: Django for backend web development
REST API development and integration
Shell scripting for automation and system operations
Ansible for configuration management and IT automation
Version control tools: Git, SVN
Databases: MongoDB, NoSQL, SQLite3, MySQL, Parquet
Caching and messaging: Redis, ZeroMQ
Basic knowledge of AI and machine learning principles
Docker containerization and microservices development
Networking fundamentals: DHCP, DNS, IPAM, port scanning, vulnerability scanning
Cybersecurity: Familiar with internet protocols and core security principles
Linux systems administration: Ubuntu, networking equipment (routers), hardware support
System administration: troubleshooting, diagnostics, and issue resolution
Business tools: Microsoft Office, reporting, vendor management, invoice handling
Data analysis and administrative support
Team leadership, mentoring, and collaborative project execution
Strong critical thinking, innovation, deadline management, and multitasking
Highly organized, enthusiastic, and confident with excellent coordination skills