Full Stack Engineer

Open to full-time
Bio

Tajudeen Y. is a Full Stack Engineer with several years of experience in software development, specializing in building scalable applications and system architectures. Proficient in C#, Python, JavaScript, Flutter, and .Net, Tajudeen develops REST APIs, microservices, and mobile applications. He is experienced in using tools like Docker, AWS, and Azure for DevOps deployments, and employs CI/CD practices to ensure efficient software delivery. At OldMutual Nigeria, Tajudeen led a team to create backend payment middleware and integrated recurring payment functionality using PayStack. At Payceler, he designed a mobile banking platform's architecture using Flutter and revamped the Payceler application with ReactJS, enhancing system functionality and performance. Tajudeen holds a degree in Computer Science from Ladoke Akintola University. He is well-suited for roles that involve leading development teams and architecting complex software solutions in dynamic environments.

Expertise
AngularAWSC#Relational DatabaseFlutterGitJavaJavaScriptKotlinNode.jsPHPPythonReactTypeScript
Video Intro
Assessments
APPLICANT AVG · 54%TAJUDEEN · 85%0255075100TopASSESSMENT SCORE (0–100)

General Coding Assessment

(85/100)
  • H Distance L QuestionEasy
  • Good score on Two Algorithm QuestionsMedium
  • String Scramble QuestionMedium
Experience

  1. Head of IT/ Senior Software Engineer (SSE)

    SanwoTouch2Pay Technology ServicesNov 2014 — Aug 2017
    • Built desktop and mobile applications for NFC card/tag integration
    • Directed software design and development, focusing on client needs and rapid prototyping.
    Android, NFC (Card, Wrist band etc.), .Net, Azure, ASP.NET, Microservices, c#, Postman, Android Studio, Visual studio, Web API, ReactJs, POS application, Bar code reader with NFC

  2. Team Lead / Senior Software Development Engineer (SDE)

    OldMutual NigeriaJan 2024 — Aug 2024
    • Led an IT team of more than 7 engineers, unblocking any blockers.
    • Crafted solutions fit for business purposes within the Digital and Data business.
    • Managed DevOps deployment using AWS CloudFormation with AWS serverless framework.
    • Created backend payment middleware for seamless transactions.
    • Improved software engineering practices, operational excellence, and introduced new APIs using .Net
    • Integrated recurring payment functionality using PayStack.
    NodeJs, MySql, JavaScript, Azure, Amazon S3, AWS Managed Services, ReactJs, AWS CloudFormation, .Net, Spring boot, Docker, Redis, Kibana, Flutter.

  3. Team Lead / Senior Software Engineer (SSE)

    PaycelerDec 2022 — Dec 2023
    • Designed the entire system architecture for a mobile banking platform using Flutter
    • Led an IT team of over 8 engineers, ensuring smooth project progress
    • Developed REST APIs to efficiently perform CRUD operations, optimized data management & enhanced system functionality.
    • Managed DevOps deployment using Bitbucket and AWS Fargate.
    • Revamped the Payceler application using ReactJS and handled DevOps automation with Docker
    C#, Python, ReactJs, Flutter, .Net, Microservices, Postman, REST APIs, Docker, Postgres, MySql, Api gateway (Ocelot), Celery, Amazon S3, AWS Managed Services, AWS VPN, AWS ALB

  4. Team Lead / Senior Software Engineer (SSE)

    TheBulb AfricaAug 2021 — Nov 2022
    • Designed and built the CP-Trading System architecture from scratch.
    • Developed multiple microservices and the frontend using AngularJs.
    • Managed DevOps deployment with Bitbucket and AWS Fargate.
    • Added real-time notifications using web sockets.
    • Led an IT team of 9 engineers, ensuring smooth project progress.
    AngularJs, .Net, Microservices, c#, Elasticsearch, AWS, MySql Server, Bitbucket deployment script, Docker, Web Socket, Api gateway, Postman, AWS ALB, Visual studio code, Visual studio

  5. Software Engineer (SE)

    Andela Lagos, NigeriaNov 2019 — Jan 2021
    • Developed custom mobile applications using native technologies.
    • Engaged in various client projects, focusing on data structures and algorithms
    • Provided maintenance and developed bug fixes and patches for existing applications.
    Android (native), .Net, Microservices, c#, Azure, Postman, Android Studio, Visual studio, Visual studio code, Java, Kotlin

  6. Software Engineer (SE)

    AlatByWema - WemaBankJul 2017 — Aug 2019
    • Led a team to upgrade the ALAT for Business and ALAT by Wema applications.
    • Worked closely with cross-functional teams to strategize product design and implementation.
    • Developed custom applications using technologies like C#, Xamarin, and Microsoft .Net.
    Android (Xamarin), .Net, Azure, Microservices, ASP.NET, c#, Postman, Android Studio, Visual studio, Web API, WCF

  7. Software Engineer

    WurknSep 2025 — Jan 2026
    • Backend Development (Django/FastAPI) - Architected and developed multi-service microservices platform with Django REST Framework and FastAPI - Implemented comprehensive RESTful API with 50+ endpoints supporting multi-tenant SaaS architecture - Built role-based access control (RBAC) system with 5 user roles and company-scoped data isolation - Designed and implemented anonymous session management for secure anonymous feedback collection
    • AI/ML Integration - Implemented multimodal sentiment analysis system (text, audio, combined) using OpenAI GPT-4o and Whisper-1 - Built Ridge Regression ML model for KPI prediction (sentiment, productivity, retention, revenue metrics) - Developed automated model training pipeline and feature extraction system - Integrated Azure Cognitive Services as fallback for high availability
    • Third-Party Integrations - Implemented OAuth 2.0 flows for Slack and Microsoft Teams integrations - Built webhook handlers for real-time message processing and feedback submission - Created HRIS integration (Simplr) for user synchronization and feedback link management - Developed secure token management and refresh mechanisms
    • Frontend Development (React/TypeScript) - Built responsive React application with TypeScript and Tailwind CSS - Developed comprehensive dashboards (Company, Employee, Admin) with real-time analytics - Created 30+ reusable components with form validation and error handling - Implemented role-based routing and authentication flows
    • DevOps & Infrastructure - Containerized all services with optimized multi-stage Dockerfiles - Configured CI/CD pipeline with GitHub Actions for automated deployments - Set up monitoring stack (Grafana Loki, Prometheus, Seq) for observability - Implemented API Gateway using .NET YARP for service orchestration - Optimized Docker builds reducing image sizes by 60%+
    ApigatewayC#PythonOpenAi apiMicroservicesPycharmReactJsPostgresSwaggerDocRest FrameworkCiCdGithub ActionAWSNginxEc2DockerIntegrationsDevOpsAI/ML
Education

  1. Computer Science

    Ladoke Akintola University Ogbomoso, Oyo State, Nigeria2009 — 2014
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