Freelance
Backend & DevOps Engineer
Backend & DevOps Engineer
Netlabs Australia Pty Ltd.
Computer Support and Services
- Using Golang, Postgresql, Gorm ORM, and Gin Gonic web framework, I developed a backend microservice.
- Leveraging Nest.js, Node.js, Postgres, TypeORM, and Typescript, I developed two backend microservices.
- Using Golang, I developed custom Lambda triggers in AWS Cognito to effectively manage and modify email messages.
- For user authentication, we relied heavily on the AWS SDK, particularly in Cognito.
- I implemented GitHub Actions CI/CD for repositories to build and push docker images to AWS ECR.
- My responsibilities included developing cloud infrastructure in AWS, utilizing Terraform and Terragrunt.
- I helped design the AWS cloud architecture for our application, which included API Gateway & Authorizer, Cognito, Lambda, S3, and EKS. Our goal was to create a scalable and secure solution that would benefit our users.
Stack:
Go/Golang, TypeScript, Node.js, PostgreSQL, AWS, AWS SDK, Cognito, Lambda, API Gateway, Kubernetes, Docker, CI/CD
DevOps Engineer
Calvin Newstead, Upwork
Computer Services / eCommerce / CRM
- I had the opportunity to manage Linux servers and was able to successfully set up SSL for several client websites, which helped improve their security and reliability.
- I was able to create external automated backups to Google Drive and AWS S3 using BASH scripts and Cronjob, which helped our clients stay protected in case of a disaster.
- Using BASH scripts and Cronjob, I established external automated backups to Google Drive and AWS S3 for disaster recovery purposes, and implemented AWS S3 lifecycle rules that automatically move and delete old backups. This helped optimize the storage usage and ensured that our backups were up-to-date.
- At the client's request, I created a detailed recovery document outlining the steps needed to recover websites and data in the event of a major downtime, in order to ensure that we were prepared for any potential system failures.
- I upgraded the client's self-hosted FreePBX instance to ensure it had the latest security features and module updates, which was crucial for their business.
- While working with the client, we discussed various strategies to optimize their cloud resources and make them more cost-effective and resilient, based on my understanding of cloud infrastructure.
Stack:
Vultr, Linux, BASH, SSL, Let's encrypt, Apache, Nginx, AWS S3, FreePBX, Golang
Backend Engineer
Ildar Samit, Upwork
Computer Services
- I developed the client's backend microservice using Python and FastAPI to upload/download objects to GCP Object Storage.
- At the client's request, I implemented a codebase linter to improve code readability and maintainability.
- I delivered the project within a week, and the client was satisfied with the overall outcome.
Stack:
Python, FastAPI, Google Cloud Platform (GCP), GCP Object Storage
DevOps Engineer
Gratisgraphics.com
Computer Services
- I had the privilege to set up the client's CI/CD on Gitlab, which enabled automated builds and deployments, resulting in improved productivity for the development team.
- At the client's request, I was tasked with cloning one of their websites and implementing additional changes based on their requirements.
- In order to make our CI/CD processes more efficient and cost-effective, I identified areas for improvement and implemented changes where necessary.
- Upon the client's request, I took on the responsibility of moving their old Git repositories to a self-hosted Gitlab instance.
- The development team encountered an issue with the Gitlab runner causing delays. I investigated and fixed the problem, allowing the team to resume their work promptly.
Stack:
Linux, Gitlab, Gitlab CI/CD Pipelines, Node.js, Next.js, Docker
Netzon Global Technology Inc.
Software & DevOps Engineer
DevOps Engineer
AlgoDx
Healthcare / Medical Technology Company (MedTech)
As a member of a DevOps team for a healthcare company based in Stockholm, Sweden, I was tasked with designing and implementing an Infrastructure as Code (IaC) solution to automate a vast cloud infrastructure on Amazon Web Services (AWS) utilizing Terraform. With a focus on security, the solution was designed to secure sensitive data such as Protected Health Information (PHI) and enforce a Zero-Trust principle while maintaining overall performance.
To ensure scalability and high-availability, a microservices architecture was implemented using Kubernetes to cluster applications. In addition, for secure deployment, we utilized pull-based ArgoCD to deploy applications in Kubernetes.
To achieve traceability and observability, the solution employed Grafana with CloudWatch, Loki, and Prometheus backends to create interactive visualization and dashboards, providing valuable insights into the system's overall health and performance. Through this approach, we were able to streamline the infrastructure's management, reduce downtime, and increase system efficiency.
Stack:
Terraform, Amazon Web Services (AWS), Kubernetes, Docker, ArgoCD, GitHub, Grafana
Software Engineer
AlgoDx
Healthcare / Medical Technology Company (MedTech)
During my tenure with a healthcare client based in Sweden, I successfully implemented a sophisticated backend web application capable of processing millions of medical data points from various hospitals. This data was then used as input parameters for a Machine Learning algorithm to predict and diagnose diseases accurately.
To achieve these objectives, the application was built utilizing advanced technologies, including Python Programming Language, FastAPI Python-based Web Framework, and PostgreSQL for data persistence, leveraging its advanced querying capabilities. A microservices architecture was also employed, enabling parallel processing and ensuring that the system could handle the vast amounts of data efficiently.
In addition to designing and implementing the application, I was also responsible for managing the services and deployments in a Kubernetes cluster production environment. Through my contributions, the client was able to streamline its operations and enhance overall performance.
I collaborated to revise their requirements and implemented them as a full-stack web application that displays patient medical information. The project was built using ReactJS, TypeScript, Python Programming Language, FastAPI Web framework, PostgreSQL, and advanced SQL queries.
To ensure smooth progress and maintain open communication channels, I participated in weekly meetings with the client for updates and planning discussions. Through this approach, we were able to ensure that the application met their unique needs while delivering optimal performance.
Stack:
Python, FastAPI, PostgreSQL, TimescaleDB, Docker, Kubernetes, ReactJS, TypeScript
Software Engineer
Kazam.ph
eCommerce / Platform
As a member of a development team for a Filipino-owned multi-platform project, I was tasked with implementing advanced and efficient SQL queries. Working collaboratively with the team, we sought to meet all client requirements while focusing on developing efficient large SQL queries that could effectively serve both frontend and mobile platforms.
To achieve this goal, we utilized C# and Entity Framework on top of .NET Core 5, ReactJS for the UI, and PostgreSQL for data persistence. Through our combined efforts, we successfully delivered a high-performance system capable of meeting the needs of our client and providing end-users with a seamless and intuitive experience.
Stack:
C#, .NET Core 5, Entity Framework, Docker, Kubernetes, ReactJS, TypeScript, PostgreSQL
Software & DevOps Engineer
Gladapar.se
Online Survey
My task was to clone and modify a statistics and data-gathering web application for a client based in Stockholm, Sweden. The project involved a series of complex requirements that demanded a high level of technical expertise and attention to detail.
Firstly, I accessed the production monolith server hosting the web application and made a copy of it. Next, I provisioned a new production Linux server and installed and configured appropriate software such as Nginx and network firewall.
To streamline the development process and ensure seamless deployment, I configured a robust CI/CD pipeline on BitBucket, effectively separating the environments for testing and production while automating the deployment process. This approach enabled me to maximize development time while delivering an efficient and reliable solution.
Finally, I modified the web application according to the client's specific needs, ensuring that the final product met all requirements and delivered optimal performance.
Stack:
Python, Django, MySQL, HTML, CSS, Docker, BitBucket, CI/CD, Nginx, Linux
IoT and Software Engineer
Enequi
Internet of Things (IoT) / Energy Company
I implemented solutions for an Energy company in Sweden for two projects. The first involved collaborating with a large team to develop Internet of Things (IoT) solutions for Android and iOS smartphones to control lighting devices using Kotlin Programming Language, Facebook Litho for the User Interface, SQLite for data persistence, Bluetooth 5.0, and Mesh network topology for the device communication.
The second project involved developing a frontend web application to display and monitor energy, wall battery, and device status and usage using AngularJS for the UI, NodeJS, and ExpressJS.
Stack:
Android, Kotlin, JAVA, Bluetooth 5.0, Bluetooth Mesh, SQLite, Node.js, Angular.js, Express.js
Others
- I participated with the frontend team at Netzon to implement User Interfaces on several projects based on client requirements. The team utilizes JavaScript UI frameworks such as AngularJS and ReactJS.
- I was able to find bugs and issues in third-party libraries used by Netzon on their projects and have them addressed to their corresponding repositories.
- I contributed to the architecture planning and discussions of several projects at a technical level by helping them choose the best tiers, technology stack, and AWS services to minimize resources cost without compromising the solution quality.
- I participated in interviewing new applicants and validating their assessments at a technical level.
- I participated in mentoring some colleagues on the proper use of technologies that the company is standardizing, such as AWS, Terraform, Docker, Kubernetes, Linux, and web servers.
- I hosted an internal knowledge-sharing session entitled "Object-Oriented Programming and Design Patterns in JAVA" that discussed the different types of design patterns, use cases, and their nature.
- I participated in "Netzon Talk 2022" where I covered a topic entitled "Nginx, DNS, and Phishing" discussing how to debug Nginx configurations locally, how DNS works, and how they are applied in phishing.
