Hi there! I'm Allen Tokjuman.I'm a backend software engineer with5 years of experience in developing &maintaining production-scale microservices.

Backend SWE in an Agile team that develops 12 middleware-based distributed microservice APIs for 10+ product teams. Lead developer in rewrite of monolith JBoss SOAP service into 12 distributed REST API microservices spanning 36 endpoints with Spring Boot and Apache Camel, expanded JUnit test suite and wrote OCP templates, improving to 150K calls per day. Developed a Java Spring distributed request audit service with asynchronous processing and request caching through AMQ messages and Redis, created ETL data pipelines, Hibernate entities to use Azure CosmosDB Postgres, 12 APIs adopted td. Successfully exposed 12 REST APIs to Azure APIM, configured Redis, load balancer and wrote policy fragments for Okta auth, Terraform templates and publisher/extractor CI/CD pipelines to automate deployments, onboarded 30+ external dev teams. Developed a Document Blob microservice using Java Spring Boot, Azure Blob Storage and ELK stack, performing source data collection and transformation through Elastic Beats and Logstash, refined Elasticsearch templates for optimal query indexing. Migrated container registry/dependencies from Artifactory to ACR, updating Openshift Kubernetes templates, Jenkins CI/CD release and promotion pipelines and migration batch jobs for secrets from HashiVault to CyberArk, 25% improved build time. Modernized 12 applications with JDK, Spring, and base image upgrades, and increased JUnit test suite code coverage to 90%. Developed a Java Spring Boot pub-sub distributed microservice using Apache Kafka streams, enabling client teams to consume topic feeds for push notifications, 2FA and automated emails, providing high availability and reliability with 70K calls per day.

• Java
• Spring Boot
• Apache Camel
• Azure
• OCP
• Kubernetes
• Docker
• PostgreSQL
• AKS
• Kafka
• Redis
• AMQ
• Elasticsearch
• Logstash
• Kibana
• CosmosDB
• Jenkins
• APIM
• ACR
• Okta
• JUnit
• Hibernate
• Microservices
• ELK
• IaC
• Terraform
• Ansible

Fullstack dev in an Agile scrum team that feature developed a state-level tax revenue web app used by 50+ jurisdictions. Reworked React class-based components, hooks, Apollo Client GraphQL queries on NextJS in Collection system to functional components, reusable custom hooks & new Typescript interfaces, with 20 Jest unit tests, resulted in 25% smaller bundle size. Lead developer in onboarding AMEX payment SDK, integrating helper class & ORM entities with Node/Nestjs REST API payment routes, allocates funds & writes to Azure MongoDB with Spark, unit tested in Selenium, $2M+ funds allocated ytd. Led reworking of React graphing components, SASS classes and 50 SSRS Postgres queries to use clustered indices for joins & updated group statements, with new Kafka streams for async-write & cached in Elasticsearch, for 20% improved query speed. Implemented Entra SSO auth in Azure-hosted .NET Core C# REST API auth-handler routes, wrote Terraform config files, updated Docker files and managed AKS Kubernetes cluster through Ansible, for 24H access and 35% reduced 2FA volume. Standardized ESLint rules for TypeScript releases, updated Webpack plugins & enabled Jenkins build tests to run in parallel.

• .NET Core C#
• NodeJS
• NestJS
• NextJS
• Typescript
• Azure
• React
• Apollo Client
• GraphQL
• PostgreSQL
• Kubernetes
• Docker
• Ansible
• CosmosDB
• Kafka
• Redis
• Elasticsearch
• AKS
• Jest
• Prisma
• Webpack
• SSO
• MSTest
• Selenium
• REST API

Teaching Assistant for 3rd year Faculty of Electrical and Computer Engineering courses: ELEC326 - Probability & Random Processes and ELEC374 - Digital Systems Engineering. In ELEC326, I led weekly tutorials and office hours, walking through sample problems and explaining concepts that students struggled with. In ELEC374, I worked as a resource in the weekly Lab course portion, where students would design a RISC processor in Verilog or VHDL over the semester. I assisted students in translating class theory to machine code for CPU operations.

Developed MDnius, a SaaS digital clinic app for family practice clinics, in Agile team on JIRA with BitBucket Version Ctrl. Deployed a clinic signup portal on AWS with React, Nextjs, Typescript, SASS, a Dockerized Node/Nestjs REST API on an ArgoCD & CircleCI pipeline, AWS RDS, wrote Terraform EKS cluster config, streamed Kafka events & cached in Redis. Migrated AWS ECR container EC2 instances, security rules & tasks, to Lambda functions, reduced monthly costs by 15%.

• React
• Django
• Go
• NodeJS
• AWS
• Kubernetes
• EKS
• AWS Lambda
• Redis
• DynamoDB
• Ruby on Rails
• Docker
• Bootstrap
• AGILE
• Git
• Jira & Bitbucket
• Python
• Javascript
• HTML
• SASS
• Typescript
• Cypress Unit Testing
• Twilio
• Serverless

Created an Angular/Python & Spark webtool, and Airflow scheduling AWS Redshift data transfer when uploading CAD file. Wrote Apache Spark Python scripts & AWS Step functions to read from Redshift and integrate with Dockerized pyautocad plugin application to analyze files and generate frequent layers/arcs in new CAD files, for a 15% CAD workflow timesaving. Built a sheet automation scripter in Golang/Gin, deployed on AWS ECR through EC2 instances with EKS cluster, to save reports in S3 Bucket and automated report generation for accounting team, resulting in 30% Excel compilation timesaving.

• Angular
• Python
• Django
• Golang
• AWS
• SQL Server
• Google Cloud
• Kubernetes
• BigQuery
• Docker
• pyautocad
• AutoCAD
• smtplib
• Cloud Functions
• CAD Automation
• SMTP
• Email Automation

As Manager for a team of 4 students, I led the development of a React SPA website for a Kingston dental practice certification company by reviewing Git pull requests, delegating development issues, and leading meetings with our client to document their requirements. Simultaneously, I conducted weekly open-to-all seminars on current industry web development libraries and tools. My role involved providing technical guidance and facilitating discussions to enhance the team's skills and project outcomes, resulting in a successful website launch, with minimal maintenance required and a team confident in their web-dev skills!

• React
• NextJS
• Tailwind
• CloudFlare
• CSS
• HTML
• Git
• Docker
• Firebase
• MongoDB
• Database Design
• Project Management