Available for Freelance · Vancouver, Canada

Moinuddin
Masud

Senior Software & Data Engineer
15+ years building systems that scale

  • Event-driven microservices — Kafka, Go, Java Spring Boot
  • Data pipelines & AI/ML integration — AWS Bedrock, pgvector, LLMs
  • Cloud architecture — AWS certified, Kubernetes (CKAD), Terraform
  • Fintech-grade reliability — American Express UK engagement
→ Hire on Upwork See Services Blog ↗
MM AVAILABLE
Go
Java / Spring
CKAD · K8s
AWS ×6
Kafka
Python
Currently available for new projects
Full-time contract · Part-time · Fixed-price — open to all engagement models
Get in Touch →
15+ Years of experience
6 AWS Certifications
3 Countries worked in
∞ Lines shipped to prod

What I offer

Services for your project

I work with startups, scale-ups, and enterprises. Whether you need a backend rebuilt, a data pipeline from scratch, or an AI feature added to an existing product — I can scope it and ship it.

⚡
Backend API & Microservices
Design and build production-grade REST/gRPC APIs and event-driven microservices. Clean contracts, observability built in, ready to deploy.
GoJavaSpring BootgRPCREST
🌊
Event-Driven Architecture
Kafka-based streaming pipelines, CQRS/Event Sourcing patterns, Schema Registry, dead-letter handling — built for reliability at scale.
KafkaAvroCQRSEvent Sourcing
☸️
Cloud & DevOps Setup
AWS architecture, Kubernetes deployments, CI/CD pipelines, IaC with Terraform. From zero to production-ready infrastructure.
AWSKubernetesTerraformGitHub Actions
🧠
AI / LLM Integration
Add AI features to your existing product — RAG pipelines, vector search, AWS Bedrock, LangChain, embedding models. Practical, not experimental.
AWS BedrockLangChainpgvectorRAG
🗃️
Data Engineering & Pipelines
ETL/ELT pipelines, PostgreSQL schema design, data modelling, and analytics-ready warehouses. Reliable ingestion, clean output.
PostgreSQLPythonRedshiftDynamoDB
🔍
Code Review & Architecture Audit
Deep technical review of your codebase, API contracts, or system design. Actionable written report with prioritised recommendations.
ArchitectureADRSecurityPerformance

Why me

What sets this engagement apart

Hiring a freelancer is a bet on communication as much as code. Here's what working with me actually looks like.

🏦
Fintech production experience
Built and maintained systems processing millions of American Express UK transactions daily. I know what "production-grade" actually means — not just in theory.
📋
Clean documentation, always
Every project ships with ADRs, API contracts, and a handover doc. You won't be left with a black-box system you don't understand.
🌍
Multi-timezone, async-friendly
Worked across UK, Bangladesh, and Canadian timezones. Comfortable with async-first teams and clear written communication as a default.
🎯
Outcome-oriented, not hours-oriented
I scope work clearly upfront, flag risks early, and optimise for your outcome — not for padding a timesheet. Fixed-price or hourly, same approach.
🏅
6× AWS certified + CKAD
Including Data Engineering Associate, Generative AI Professional, and Solutions Architect. Not just certifications — these reflect systems I've actually designed.
🔬
Public writing & open source
I blog about Kubernetes operators, Go concurrency, and AWS architecture. What I know, I can explain clearly — to engineers and to stakeholders alike.

Portfolio

Real work & open-source

Live products, open-source tools, and AI pipelines — spanning DevOps/MLOps, platform engineering, mobile commerce, and distributed systems.

LIVE PRODUCT AI/ML DevOps · MLOps

AnalyseThisWC26 — FIFA World Cup 2026 Analytics

Live analytics & AI match-prediction platform for FIFA World Cup 2026, built by NeuNov Technologies. Ingests ESPN player and team data via a scraping ETL, applies Elo, Dixon-Coles, Logistic Regression, XGBoost, and LightGBM models (blended prediction function), and serves results through a Next.js frontend with interactive dashboards and a Poisson-based match predictor.

My contribution — DevOps & MLOps
  • ▸ Designed and managed the full AWS infrastructure: ECS Fargate, S3, DynamoDB, Lambda — containerised services with Terraform IaC
  • ▸ Built the ETL pipeline: ESPN data scraping → transform → DynamoDB/S3, scheduled via Lambda
  • ▸ Set up GitHub Actions CI/CD for automated model retraining and deployment; MLOps pipeline with Jupyter Notebook model artefacts promoted through staging → production
  • ▸ Coordinated infrastructure for Python prediction models (XGBoost, LightGBM) and Next.js frontend serving real-time tournament data
AWS ECSLambdaS3DynamoDB TerraformGitHub Actions PythonXGBoostLightGBM Next.jsJupyter NotebookESPN Scraping
atwc26.com — live site ↗
STACK LAYER
Infra
AWS + Terraform
STACK LAYER
ETL Pipeline
Lambda + DynamoDB
STACK LAYER
MLOps CI/CD
GitHub Actions
LIVE MOCK SaaS Platform Product Ownership

Swavu — Rwanda Mobile Commerce & Admin Platform

Digital transformation initiative for Swavu Ltd, a Rwanda-based social enterprise distributing consumer goods to small shops across Africa. I led product design and prototyping across three surfaces: a consumer mobile app (QR product verification, loyalty points, shop finder, returns), an admin console (inventory, orders, analytics), and the marketing website — with full product documentation and formal project artefacts.

My contribution — Product & Platform Architecture
  • ▸ Designed end-to-end mobile app prototype: QR-based product verification (Swavu Promise), loyalty programme, shop locator, MoMo-integrated returns flow
  • ▸ Defined admin console architecture and UX: product catalogue, supplier management, order fulfilment, analytics dashboards
  • ▸ Produced formal project artefacts: RPI document, system architecture, API contracts, Go backend design for the Golang-powered verification service
  • ▸ Rebuilt the marketing website from concept to deployed mock on Vercel; acted as sole technical and product lead
Go (backend)Next.jsReact Native AWSVercel QR VerificationLoyalty EngineMoMo Integration
SURFACE
📱
Mobile App
React Native
SURFACE
🖥️
Admin Console
Next.js
SURFACE
🌐
Website
Next.js + Vercel
OSSActive

temflowral

Visual durable-workflow editor connecting React Flow with Temporal's execution engine. Drag nodes to define long-running process logic; Temporal guarantees fault-tolerant execution.

React FlowTypeScriptTemporalGo
github.com/madmmas ↗
AI/MLOSS

KubeAgent Control Plane

Go multi-module Kubernetes operator with three CRDs (Agent / Finding / RemediationPlan) and AWS Bedrock integration for AI-driven cluster remediation.

GoKubebuilderAWS BedrockCRDs
github.com/madmmas ↗
AI/MLOSS

News Radar

Multilingual news aggregator for Bangladeshi sources. LaBSE embeddings, Qdrant vector storage, five-service Kafka pipeline, and an LLM-judge cascade for deduplication.

PythonLaBSEQdrantKafka
github.com/madmmas ↗
SaaSPrivate

Ackloop

Operational voice automation SaaS for NOC teams. Full PostgreSQL event-sourced data model, 18-endpoint API contract, and Kafka topic contracts for real-time alerting.

GoPostgreSQLKafkaReact
Private repo

Experience

15 years of shipped systems

Enterprise fintech, UK broadband infrastructure, and technical leadership across three countries.

2022 — Jan 2025
Senior Software Engineer
LTI Mindtree · American Express UK
  • Led event-driven microservices processing millions of daily card transactions — Kafka, Java Spring Boot, AWS.
  • Drove cloud migration of legacy systems; reduced infrastructure costs significantly through IaC and right-sizing.
  • Established contract-first API design, ADR culture, and SLO dashboards across the engineering team.
2019 — 2022
Senior Software Engineer
Truespeed Communications · UK
  • Built the fibre broadband provisioning and CRM platform from scratch — Java, Spring Boot, PostgreSQL.
  • Designed real-time network telemetry pipeline for field operations; integrated OSS/BSS systems.
2009 — 2019
Technical Lead → Senior Engineer
Nitto Digital · Kiteplex IT · Bangladesh
  • Led full-stack teams delivering enterprise SaaS; introduced microservices architecture and CI/CD.
  • Mentored engineers; drove adoption of automated testing and clean code practices.

Certifications

Verified credentials

🏅
AWS Data Engineering Associate
DEA-C01
🏅
AWS Generative AI Professional
ACP-GEN
🏅
AWS Solutions Architect Associate
SAA-C03
🏅
AWS Developer Associate
DVA-C02
🏅
AWS AI Practitioner
AIF-C01
☸️
CKAD — Kubernetes App Developer
CNCF · Linux Foundation
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First client? I offer a free 30-min scoping call and a milestone-based payment structure with no risk.

Ready to start
your project?

Send me a message on Upwork, or reach out directly. I respond within 24 hours. Let's talk scope, timeline, and fit before any commitment.