• Implemented the backend API service in TypeScript, NestJS and MongoDB for all social-related features, including groups, user feed posts, comments, likes, performance logs and more• Implemented a backend distributed service in Go for running, aggregating and processing all internal async tasks• Designed and implemented infrastructure using Terraform in GCP, focusing on our Cloud Run cluster.• Set up telemetry metrics with Grafana open-source tools, utilizing OTel and Prometheus.• Migrated our monitoring from Grafana to Datadog, replacing OTel with Datadog SDKs due to inconsistencies with the OTelprotocol.• Built a new authorization system.• Implemented live streaming capabilities for competitive organizations, enabling them to stream live videos to our platform via theRTMP protocol.• Developed an activity logging system to track user interactions, which enhanced the user experience by improving contentdiscovery and was also integral to the Rewards system.• Created a rewards system tied to milestone achievements.• Enhanced system reliability and performance, leading to a reduction in resource usage and associated costs.

• Migrated the company's SSO from Google IdP to Okta• Redefined the internal roles in the Rails application, including Invest Ops roles, by segregating them into compliance-based tiers to meet new regulatory requirements• Helped Invest Ops and Financial Ops departments to migrate all their workforce from the legacy authorization to the new one using Okta• Integrated the internal background check application pipeline with the Helpdesk system, enabling automatic customer identification in incoming tickets for locked accounts due to suspicious activities, significantly reducing operational costs for Invest Ops and Support

• Migrated critical system functionalities from a legacy PHP monolith application and added to a new service using Golang and Typescript. This migration eliminated a lot of bottlenecks in integrating new shipping carrier partners and updating delivery rates, leading to a more clever process for both carrier integration and feature deployment.• Deployed K8S on AWS, using Istio for resource allocation to workload instances• Implemented versioned workflows using ArgoCD• Improved internal communication with gRPC• Built telemetry integration Datadog and Bugsnag across new green field services• Implemented our new tag management service using NestJS with CQRS and Redis as an event bus. This architecture, tailored for high write volumes, enabled a more efficient and scalable tag-processing system by segregating those concerns, also, queues were implemented to handle any tag generation failure from our partners due to their high downtime and incident rates

• Implemented sockets to broadcast real-time updates using ActionCable, resulting in a better user experience in areas like paymentworkflows.• Implemented a background check pipeline to filter professionals who might not fit our internal policies due to legal concerns,thereby safeguarding our customers and offering high-quality, qualified professionals.• Implemented third-party tool adapters that don't offer support for the Ruby language/Rails environment.• Optimized SQL queries responsible for fetching thousands of customer and dispatch device notifications. Instead of fetching all atonce and storing a large amount of data in memory, the approach was to schedule jobs with chunks of customers. Each of thesejobs also dispatched a 1:1 job to a dead letter queue responsible for handling it individually in case a Firebase RPC failed.• Refactored the most critical parts of our codebase to remove nonsensical boilerplate, thereby improving both reliability andreadability. These refactoring were done aiming to be just a refactor, maintaining the user interface and ensuring no breakingchanges were introduced.