A London-based software development company dedicated to providing high quality solutions.

Cloud Engineering | Tools- RHEL7 to RHEL8/9 migration (Ansible)- CIS hardened RHEL7/8/9, Amazon Linux 2/2023 images via Packer supporting 64-bit x86 and ARM architectures- Scripting via Bash and Python

Workplace and Personal Financial Health- Security and compliance focused design and development- Contributions to overall architecture- Working on building blocks of the core platform- Infrastructure-as-Code via Terraform- AWS Lambda (Python), Step Functions, API Gateway, CloudFront, WAF, S3, Parameter Store, Secrets Manager, CodePipeline, CodeBuild, CloudWatch (Logs, Metrics, Alarms, Events, Dashboards), SQS, SNS, ECR, ECS, EFS- Design and implementation of a source code scanning automation (Checkmarx) as part of the CI/CD pipelines- Refactoring of CI/CD (build and deployment) pipelines to release individual packages in a blue/green environment- Setting up a UI automation suite via Selenium Grid running on ECS- Design and implementation of several performance testing automations (Lighthouse and Artillery) as part of the CI/CD pipelines- Refactoring of CI/CD (PR) pipelines to build, deploy and test (Checkmarx, Lighthouse, Artillery, UI Automation) smaller changes in ephemeral environments on-demand- Fixing compliance issues on all AWS accounts (via DivvyCloud)- Guiding and mentoring full stack developers- Scripting via Bash and Python

Cloud Native (AWS) IoT Project- Security and compliance focused design and development- Contributions to overall architecture- Working on building blocks of the core platform- Infrastructure-as-Code via CDK (Python) / CloudFormation- AWS IoT services, Kinesis Firehose / Analytics, Redshift, Sagemaker, API Gateway, Lambda (Python), Fargate, DynamoDB, RDS, Redis, S3, SNS, KMS- Scripting via Make, Bash and Python

Core Platform- Security and compliance focused design and development- Working on building blocks of the core platform- Infrastructure-as-Code via Terraform, Packer and Ansible- Serverless - AWS Lambda (Python), Step Functions, DynamoDB, Parameter Store, Systems Manager Automation, SQS, S3, KMS- Design and implementation of an AMI baking solution- Design and implementation of a modular solution to run on-demand security scans via InsightVM and InSpec- Design and implementation of automated IAM credentials rotation- Scripting via Make, Bash and Python

Digital Cloud & Platform Services- Security and compliance focused design and development- Contributions to overall architecture- Working on building blocks of the core platform- Infrastructure-as-Code via Terraform- Serverless - AWS Lambda (Python & Node.js), Step Functions, DynamoDB, Parameter Store, Systems Manager Automation, SNS, SQS, S3- Helping other project teams with their AWS adoption and compliance- Building in-house products such as AMI baking, Docker image scanning, EKS clusters, Splunk HEC, etc.- Scripting via Bash and Python

Bó - Challenger bank from RBS/NatWest - https://bo.money- Security and compliance focused design and development- Contributions to overall architecture- Assessing 3rd party solutions for security and performance- Working on building blocks of the core platform- Infrastructure-as-Code via Terraform and Packer- Serverless - AWS Lambda (Python), Cognito, DynamoDB, Secrets Manager, SQS, S3- Secured storage on S3 for sensitive documents with dedicated keys and tight access permissions- Design and implementation of a Transit Gateway solution for many VPCs from multiple AWS accounts with custom routes and network ACLs- Highly available and fault tolerant cluster of transparent HTTPS Squid web proxies with granular whitelisting and access control- Processing and sending CloudWatch Logs to Splunk via Lambda functions- Continuous improvement on EKS clusters- Scripting via Bash and Python- Secrets and keys management via Vault, Secrets Manager and KMS

Serverless project on AWS about Securities Financing Transactions Regulation (SFTR)- Security and compliance focused design and development- Documentation of observations and suggestions on potential improvements- Contributions to overall architecture- Serverless - API Gateway, Cognito, AWS Lambda (Python & .NET Core 2.1), Step Functions, DynamoDB, Parameter Store, SNS, S3- Guiding and mentoring full stack developers- Restructuring AWS accounts via AWS Organizations - Separate accounts for different purposes w/ tighter security controls- Cloudtrail logging and alerting based on CloudWatch events - i.e. Login attempts, certain actions on AWS services, etc.- Infrastructure-as-Code via CloudFormation- CI/CD pipeline improvements (VSTS)- Secrets and keys management

Cloud native project on AWS for RBS/NatWest- Working as both a (interim) Solutions Architect and a hands-on DevOps Engineer- Security focused solution design on AWS- Serverless - API Gateway, Cognito, AWS Lambda (Python & Node.js), Parameter Store, SNS, SQS, S3- Microservices architecture- Infrastructure-as-Code via Terraform- Scripting via Bash and Python

Connected Money - https://www.hsbc.co.uk/connected-money- Security and compliance focused design and development- Infrastructure-as-Code via Terraform- Serverless - API Gateway, AWS Lambda (Python & Java), Step Functions, Parameter Store, SNS, SQS, S3- Jenkins Pipelines for Java builds and deployments- Creating base AMIs via Packer and provisioning via Ansible- Mutual TLS (TLS + client-certificate verification) implementation w/ nginx- Automated secrets retrieval on instance startup w/ restricted access- Troubleshooting production issues and liaising with 3rd parties for solutions- Documentation of observations and suggestions on potential improvements- Contributions to overall architecture

- Maintained existing development environment and CI/CD pipeline- Created new Python services using CloudFormation and Puppet- Migrated Python 2.7 environments to Python 3.4- Maintained RabbitMQ and Consul clusters- Fixed and maintained Hybris servers on various environments- Participated in tech discussions about improvements

- Worked as the Release Manager for back-end (Java, Python), database (PostgreSQL) and mobile (iOS, Android) releases (merged/tagged code, built and deployed artifacts).- Re-designed company's initial presence on AWS using Elastic Beanstalk behind ELB with SSL.- Implemented a version-controlled database (PostgreSQL) change management system using Flyway, which also made it very straightforward to create new database instances at any time.- In addition to the database change management system, also designed a system to export and import large datasets to/from databases via S3, implemented on Jenkins with Bash scripts.- Setup MongoDB replication with automatic failover.- Setup a highly-available and auto-healing RabbitMQ cluster.- Setup Zookeeper and Kafka clusters for development only.- Helped setting up a metrics collections and dashboard system using statsd, Influxdb and Grafana.- Setup a centralised log collection and aggregation system using Elasticsearch, Logstash and Kibana with custom Logstash scripts to also extract certain metrics and publish to metrics collection system.- Used open-source log publisher Beaver (Python) and contributed to the project to fix a production issue.- Setup a direct, always-on IPSec link between head office and AWS using Openswan.- Helped designing internal IP structure on AWS and setting up OpenVPN for secure access to the infrastructure across multiple continents via LDAP- Built a custom DNS server on AWS using Unbound for internal domains- Re-designed and implemented Jenkins and build jobs (Java with Maven, Python, iOS, Android) with custom Bash scripts and multi-step jobs- Helped building Android apps on Jenkins and managing signing keys- Built a performance testing suite using Gatling- Helped re-designing and implementing company's infrastructure using Puppet, Terraform and Packer- Traced and debugged issues on instances and databases on various environments

- Worked on the main website written in PHP (using CodeIgniter framework)- Worked as the Release Manager for website releases (code and DB)- Designed an image upload and batch processing system, all written in Perl, that was running multi-threaded (CPU-aware) and able to self-heal on various issues- Setup a highly-available and auto-healing RabbitMQ cluster for the image processing system above- Migrated ~4 million photos from a data centre (single machine) to AWS S3 (by also re-processing them to new sizes) without any downtime or affecting existing customers and their photos on the website- Managed IIS on a Windows server; implemented custom rewrite rules for a specific URL structure and image hotlink protection- Wrote Powershell scripts for scheduled AWS EBS backups- Installed and configured a Windows-based kiosk system from scratch with clear instructions for anyone to install overseas- Implemented a barcode scanning and custom receipt printing system, all written in PHP, for the same kiosk system above- Implemented a report exporting system for Google Analytics, all written in Perl- Patched Pure-FTP source and re-compiled for a specific issue that the legacy on-site image uploaders were causing- Built a highly-available FTP file upload system by leveraging AWS Route 53 DNS failover- Contributed to discussions and system design of online payment architecture- Developed a customisable internal development environment for developers using Vagrant and VeeWee- Helped company's move to the cloud, mainly on AWS

- Built Flash and AIR applications as well as iPhone and iPad applications.- Successfully built a Dropbox clone for iOS (for company's own cloud-based asset management software) with live preview of various text and image files. Built custom iOS elements for multiple item selection on a UITableView.- Designed and developed a live video recording and streaming infrastructure using Wowza Media Server with Flash-based recording and playing apps for a national brand's public competition.- Mainly used Amazon Web Services for cloud operations.- Managed a team of 2 multimedia developers

- Lead back-end developer. Worked on various tasks and had a key role in two major 6-month projects for Microsoft.- Wrote a patch for Apache 2.x that affected over 100 servers world-wide, to fix an issue with logging of requests.- Wrote a part of the Apache module mod_cache in pure Perl in order to locate tile paths on cache servers when a cache clean needed. Whilst writing the script, also developed a Perl module to emulate correct C-type integers.- Had a key role in re-designing website's URL structure and re-implemented it in JavaScript. Later patched it to support Virtual Earth specific parameters. Developed an algorithm to create the shorter versions of the website's long URLs and implemented it to both website and the API.- Found and fixed some encoding-related issues within Template Toolkit.- Participated in the out-of-hours support rotation- Within the last long-term project, had a key role in restructuring of both internal development systems and the website. That included, writing a new build script to integrate changes from development environment to test and production environments, re-designing and implementing changes on how dynamic and static content are fetched at client-side (i.e. via CDN), etc...- Had a (junior) role in architecture of the whole system and the products company had, especially for the Istanbul Office. Spent two weeks in London Office for meetings with several people only for that role. Spent many other weeks in London Office for other projects and/or tasks I had.

- Initially worked on interface coding; wrote cross-browser compatible HTML and CSS from PNG and/or PSD files coming from designers.- Developed different technics to load Flash content more smoothly without interrupting users.- Projects were developed on .NET framework and C# was used. Sometimes touched the C# code, whenever an issue was caught.- Worked on Flash-based game development using ActionScript 2.- Developed a crossword Flash app with an algorithm that calculated word collisions and relocated them when needed.- Developed an advergame for an international beer company. It was an adventure game with 29 rooms (collect keys, golds, run from creatures and traps, etc.). This game won the Best Advergame award in a national contest.- Developed a free kick (football) game for a lead national bank, a car racing game for an oil company, an action game for a medicine company and a multiplayer game for the company's e-learning product.- Some web sites I participated in development got awards from Web Marketing Association's WebAward.

- Worked on a web portal that was built by PHP and MySQL. Most data processing was done via text files on the server instead of a proper database. Had a key role to change that and migrate most of the system to use MySQL. Portal software was developed in-house and was a simple CMS.- Developed new modules as in getting data from 3rd party web sites, auto-complete feature via ajax technics, creating auto-generated thumbnails from and applying pre-defined masks to uploaded images.

- Mostly developed using PHP and MySQL.- Installed a Fedora server for backup and email options and maintained it for several years.- For a security related task, developed a Perl script that listened on a certain port with a custom handshaking mechanism.