Readul H C.

Stack: 

• Python,
• Django, 
• DjangoREST,
• Vue.js, 
• Quasar, 
• Postgresql
• Django ORM
• Nginx, 
• uWSGI, 
• GitLab CI, 
• Git, 
• Ansible.

Responsibilities: 

• Full-stack development, deployment, maintenance, administration of the Hybrid App (Web/Android/iOS);
• Backend: The backend is Python/Django, with a REST API written by me using. Django REST Framework (DRF) exposed to the frontend for CRUD calls;
• Database: Using Postgresql with Django ORM for storing/retrieving data programmatically;
• Frontend: Writing Quasar framework and Vue.js based frontend using Vue.js libraries like i18n, Vuex, Vue-router, and so on;
• Deployment/Maintenance/Administration: Configuring and maintaining Nginx (as a web server), uWSGI (as WSGI server), GitLab CI (for CI), Git (as VCS), Ansible(for automation);
• Management: Taking various strategic decisions from a technical perspective, and making sure the team is moving forward in harmony towards a collective goal.

Stack: 

• Python,
• Django, 
• DjangoREST,
• Selenium,
• BeautifulSoup, 
• Requests,
• Postgresql
• Django ORM
• Vue.js
• Bootstrap

Responsibilities: 

• Full-stack development, deployment, maintenance, administration;
• Web scraping: Written numerous web scraping and parsing scripts in Python for collecting product data from Online shops of Bangladesh. Notable libraries used: Selenium, BeautifulSoup, Requests;
• Backend: Written the backend in Python/Django. A REST API written using Django REST Framework (DRF) is exposed for the frontend;
• Database: Used Postgresql as the database to store scraped/formatted data. Used Django ORM for storing/retrieving data programmatically;
• Frontend: Used Vue.js as the frontend JS framework, and Bootstrap as the only CSS library. Everything else is written by me from scratch;
• Deployment/Maintenance/Administration: All deployment/maintenance works in VPS running Ubuntu as the OS, Nginx as the web server, uWSGI as the WSGI server. All System administration tasks. Revision controlling of all codes and configurations through Git.

Stack:  

• Python,
• Django, 
• Django templates,
• Jinja2,
• Django ORM,
• Postgresql,
• uWSGI,
• Nginx,
• GitLab CI,
• Git,
• Ansible,
• GNU/Linux,
• jQuery,
• Bootstrap4,
• Python unittest.

Responsibilities: 

• Coding, deployment, maintenance, administration of peer-peer book sharing Platform of Bangladesh

Stack: 

• Python,
• Django,
• Django ORM,
• Postgresql,
• MySQL, 
• OracleDB,
• MongoDB,
• Docker, 
• Vagrant, 
• LXC/LXD, 
• Git, 
• Ansible, 
• GNU/Linux, 
• jQuery, 
• CSS,
• HTML, 
• YAML, 
• JSON, 
• XML, 
• Regex, 
• Bash
• Bootstrap4,
• Python unittest.

Position: TSystem Administrator II

Responsibilities: 

• Developed GNU/Linux Distro: Single-handedly developed and maintained an Ubuntu-based GNU/Linux distribution for internal use. The distro included all the bells and whistles including package management with independent repositories, custom packaging of programs, custom programs, maintainer methodologies, and so on;
• Development: Developed various toolsets and written many scripts for a variety of tasks including but not limited to inventory management, networking, device statistics, log parsing, text processing, resource tracking;
• DevOps and System Administration: Maintained and enhanced previously developed, implemented toolsets in the DevOps and System Administration chain, as day-to-day tasks.

Position: Associate System Administrator

Responsibilities: 

• GNU/Linux Administration: Worked on, and debugged many GNU/Linux stuffs that require a deeper understanding of the system, tools, and methodologies. Worked on both Debian (as desktop) and Fedora (as server) derivatives. Worked with various package management systems, diagnosed issues from the lower level. Managed various init systems including Systemd, SysV, Upstart;
• Ansible: Designed, wrote, and maintained the configuration management, and automation tool - Ansible. Currently, 20 configuration combinations of the company’s infrastructure are fully automated through it;
• Centralized Logging Infrastructure: Designed, implemented, and maintained the ELK (Elasticsearch, Logstash, Kibana) stack for Log management, it is now the centralized Log infrastructure for the company. Experienced with implementing, and ministering Splunk too;
• Scripting: Written many scripts according to customer requirements in Bash (also POSIXsh), Python, Go for the production environment. Also written many scripts for automating various System administration and DevOps tasks;
• Version Control: Experienced with Git; designed, configured, and maintaining Gitlab - the central Git remote repository infrastructure for the Operations people; all stuff that needs to be revision-controlled are put here;
• Nagios: Configured, and maintained Nagios, the monitoring system. Written many plugins for Nagios using Bash, Python;
• Cacti: Configured, and maintained Cacti for tracking relevant historic data (usually resource usages) from devices using SNMP. Written many custom scripts for getting and formatting the data properly;
• DNS: Designed, implemented, and maintaining DNS server using BIND for internal use; had implemented a variety of configurations for ensuring optimum security and usability;
• Text Processing: Written scripts, and one-liners for various tasks involving text processing; tools used: awk, sed, grep, bash, python, and another standard *nix text processing utilities;
• LXD/LXC: Very familiar with Linux Namespace and Cgroups based machine-centric container technologies: LXC, LXD;
• Vagrant: Extensively used Vagrant; created Vagrantfile and other necessary wrapper scripts for VM creation and management;
• Docker: Tested the possibility of deploying the company App with Docker; used Docker in many smaller projects;
• Virtualization: Installed, configured, and administered Xen based OVM (Oracle Virtual Machine); written Python scripts for VM management using the REST API; familiar with QEMU, KVM, Virtualbox as well;
• Database: Worked with relational databases especially MySQL, PostgreSQL; written queries as per requirements;
• Web Servers: Installed, configured and now administering Nginx as the web server, reverse proxy; working on performance optimization, secure transportation, and overall efficiency. Maintained Apache previously;
• Performance Optimization: Worked on optimizing various performance-related parameters of Linux kernel, disks, networks, and related toolsets;
• Day-to-day Operational Tasks: Performing the trivial Operational tasks regularly to keep the whole Operational ecosystem on the best performant state.

Position: Junior Unix Administrator

Responsibilities: 

• Monitoring Infrastructure: Monitored the company’s Java-based web application, network, and related stuff, on a roster basis. Diagnosed problems, forwarded to tier-2 if needed; also done regular health checking of devices;
• Scripting for Production: Written Python scripts for getting data from several production scripts by parsing mail, saved the data, sent mails as reports with detailed time and other relevant data;
• Cobbler: Configured and maintained Cobbler for automating the installation of various Operating systems on bare metal and virtual machines;
• Scripts for Monitoring: Written scripts for automating various infrastructure monitoring tasks;
• Log Parser: Written in-house application, and access Log parser for Company’s Java-based application for parsing logs, in Bash, *nix standard utilities, and Python;
• Browser Automation: Written automated script for a browser to get data from tools, using Python (web driver-based, used Selenium);
• Monitoring Tools: Extensively familiar with the inner-workings and administration of Oracle Enterprise Manager (OEM), Nagios, Cacti.

Stack: 

• Debian,
• Ubuntu, 
• Squid, 
• PFSense, 
• Smokeping, 
• Nagios, 
• Cacti, 
• MRTG.

Configured and maintained networking devices of the ISP, provided support to the clients.

Responsibilities: 

• Team Supervision: Supervised a team working on network infrastructure;
• Infrastructure Monitoring: Monitored, on a roster basis, the whole network of the ISP; diagnosed and fixed issues;
• Networking Device Management: Configured, and administered various brands of networking devices including routers, switches which were used in-house and also by the clients;
• GNU/Linux and Service Administration: Installed and managed Debian/Ubuntu, and various needed services including but not limited to a mail server (Postfix, Zimbra), a proxy server (Squid) for the clients;
• Firewall Management: Installed, configured, maintained PFSense (FreeBSD based) as a firewall, for the clients; also familiar with different forms of firewalls and such applications;
• Client Support: Provided support to the clients over email, phone, and on-premise;
• Monitoring Tools: For regular monitoring, used Smokeping, Nagios, Cacti, MRTG, WhatsUpGold; familiar with all of these.