Publication
Reduce Boilerplate Code With Scala Macros and Quasiquotes
https://www.toptal.com/developers/scala/macros-quasiquotes-reduce-boilerplate
Alain-Michel is available for hire
Hire Alain-MichelAlain-Michel Chomnoue Nghemning
Verified Expert in Engineering
Back-end Developer
Lyon, France
Toptal member since November 11, 2020
Bio
Alain-Michel is a software engineer with a passionate interest in data science. He's helped organizations build several software products currently running in production. Alain-Michel excels at building back-end APIs and also contributes to front-end development. Since 2012, he has delivered projects—working remotely and on-premise—with clients worldwide in various domains, including customs, banking, and logistics.
Portfolio
JamKazam
Amazon Web Services (AWS), AWS Lambda, Serverless, Serverless Framework...
John Derek Victory
Java, JavaScript, MySQL, Node.js, Spring, Apache Kafka, Apache Maven...
Crossover
JPA, SQL, REST, REST APIs, APIs, Git, Jenkins, Java 8, IntelliJ IDEA...
Experience
- Java 8 - 9 years
- Algorithms - 9 years
- Software Design - 9 years
- Spring 5 - 8 years
- Spring Boot - 5 years
- Docker - 4 years
- IntelliJ IDEA - 4 years
- Gradle - 3 years
Preferred Environment
Git, Spring 5, Gradle, Java 8, IntelliJ IDEA
The most amazing...
...software I've developed is a web application to analyze thousands of code repositories and display insights to managers on a single dashboard.
Work Experience
ETL Developer
2021 - 2023
JamKazam
- Developed a recommendation engine for the music-jamming application users.
- Designed a graph database to store connections between users and their location, preferred instruments, and latency.
- Developed ETL functions to collect data from user logs (stored in S3) and the PostgreSQL main database to feed the graph.
- Used community detection algorithms to make a recommendation engine out of the built graph.
Technologies: Amazon Web Services (AWS), AWS Lambda, Serverless, Serverless Framework, Serverless Architecture, Neo4j, PostgreSQL, Python, Graph Databases, Node.js, Architecture, AWS Cloud Architecture, Machine Learning, HTML, HTML5, Technical Diagrams, Containerization, Amazon EC2, API Integration, Identity & Access Management (IAM), SQL, Back-end, Software Architecture, DevOps, Django, Data Engineering, Data Pipelines, Internet of Things (IoT), NoSQL, ETL Pipelines, Database Architecture, Amazon EKS, Application Security, Full-stack Development
Enterprise Architect
2022 - 2022
John Derek Victory
- Designed a gateway for back-end microservices, supporting OAuth 2.0 authentication and multitenancy, as an enterprise architect with experience in security.
- Implemented the gateway and example microservices.
- Initiated the developers' environment with build tools and CI/CD.
Technologies: Java, JavaScript, MySQL, Node.js, Spring, Apache Kafka, Apache Maven, Spring Boot, Hibernate, Spring Cloud, OAuth 2, OAuth, FusionAuth, Spring Data, CI/CD Pipelines, Technical Diagrams, Containerization, API Integration, OpenID, Single Sign-on (SSO), Identity & Access Management (IAM), TypeScript, SQL, Back-end, Technical Leadership, Software Architecture, DevOps, Java SE (Core Java), Database Architecture, Application Security, Full-stack Development
Chief Software Architect
2015 - 2019
Crossover
- Designed and built the code server application for source code storage, analysis, and insights sharing, processing over 1,000 codebases daily.
- Built a RESTful API to share insights found in the analyzed codebases.
- Designed and built CI/CD pipelines for microservices.
- Onboarded, mentored, and supervised a team of six software engineers in the system build.
Technologies: JPA, SQL, REST, REST APIs, APIs, Git, Jenkins, Java 8, IntelliJ IDEA, Kubernetes, Docker, Neo4j, Gradle, Spring Boot, Swagger, Leadership, Management, Message Queues, Back-end, Back-end Development, Graph Databases, MySQL, Hibernate, Apache Kafka, Apache Maven, Flyway, Architecture, CI/CD Pipelines, AWS Cloud Architecture, Machine Learning, Full-stack, HTML, HTML5, GraphQL, Minimum Viable Product (MVP), Technical Writing, Technical Diagrams, Grafana, Python, Amazon Elastic Container Service (ECS), Containerization, Multitenancy, Cron, Amazon EC2, API Integration, SAML, OpenID, Single Sign-on (SSO), Identity & Access Management (IAM), TypeScript, Technical Leadership, Angular, Software Architecture, DevOps, Django, Java SE (Core Java), SOAP, Web Services Description Language (WSDL), Data Engineering, NoSQL, ETL Pipelines, Database Architecture, Amazon EKS, Amazon RDS, Application Security, Helm, Full-stack Development
Software Engineer
2012 - 2015
Sopra Steria
- Developed, maintained, deployed, and trained users on human resources and payment management software.
- Built a module for enrollment, monitoring, and payroll of daily workers in the port of Libreville, used by more than ten users to manage over 500 workers.
- Contributed to the development of a module for monitoring the working hours of dockworkers in the port of Douala, used by more than 20 users to manage over 2,500 dockworkers.
Technologies: Subversion (SVN), UML, Eclipse, Spring Boot, Java 8, Hibernate, Apache Maven, CI/CD Pipelines, Full-stack, HTML, HTML5, Technical Writing, Technical Diagrams, Cron, Single Sign-on (SSO), SQL, Back-end, Java SE (Core Java), SOAP, Web Services Description Language (WSDL), Data Engineering, Data Pipelines, Application Security, Full-stack Development
Support Engineer
2011 - 2012
PolytechValor
- Maintained and enhanced the customs software for transit management (Nexus+).
- Assisted users in the Cameroon Customs and in more than five partner banks.
- Developed the moratorium management feature with PHP.
Technologies: PHP, HTML, Technical Diagrams, Cron, SQL, Back-end, Data Engineering, Data Pipelines, Application Security
Business Intelligence Intern
2010 - 2011
Orange Cameroon
- Built a clustering model to classify customers based on their phone usage, helping marketing people to design more targeted products.
- Developed a web application to help the business intelligence team run data mining algorithms on their data without the need for an expert.
- Wrote a paper on the analysis and design of tools for customers’ segmentation in a telecommunication company (Cari-info.org/cari-2012/session%203/3B1.pdf).
Technologies: Data Mining, Oracle, Java, HTML, Technical Diagrams, SQL, Data Engineering, ETL Pipelines, Application Security
Experience
API Rate Limiter
https://bitbucket.org/chomnoue/api-rate-limiter/src/master/To avoid performance issues and reduce costs, the API rate limiter allows a company to avoid too many calls to a given API.
The limits are configurable, and the rate limiter should throttle AIP calls in the following situations:
1. Too many requests within the same time window from a client
2. Too many requests from a specific client on a per-month basis
3. Too many requests across the entire system
The application is built to run in a distributed environment and has been designed to scale effectively.
The limits are configurable, and the rate limiter should throttle AIP calls in the following situations:
1. Too many requests within the same time window from a client
2. Too many requests from a specific client on a per-month basis
3. Too many requests across the entire system
The application is built to run in a distributed environment and has been designed to scale effectively.
NPS Score from Social Media
A serverless API that collects Twitter posts tagging targeted companies, runs a sentiment analysis on them, and computes their NPS (see Medallia.com/net-promoter-score/#). It runs on AWS, using cloud services such as Lambda, Firehose, S3, DynamoDB, and Comprehend, and includes the NPS score for telcos (Social-nps.herokuapp.com/dashboard). On top of that, I built a dashboard with Python and the Bokeh library and deployed it on Heroku to display the computed NPS scores.
Ebola Data Visualization
This visualization shows the evolution of Ebola cases in West Africa from August 2014 to May 2015, as reported by the WHO.
The user can select an indicator and a date to see the status on the map. He can also choose to replay the animation for the chosen indicator.
I chose to show the affected countries on a map with the orange color differentiating them. Only the affected countries are named to let the user focus on them.
A red circle is used to show the value of an indicator for each country. I chose a logarithmic scale for the circle radiuses so that with just a few cases, countries' values can be seen on the map.
The user can select an indicator and a date to see the status on the map. He can also choose to replay the animation for the chosen indicator.
I chose to show the affected countries on a map with the orange color differentiating them. Only the affected countries are named to let the user focus on them.
A red circle is used to show the value of an indicator for each country. I chose a logarithmic scale for the circle radiuses so that with just a few cases, countries' values can be seen on the map.
Education
2006 - 2011
Master's Degree in Computer Engineering
National Advanced School of Engineering - Yaoundé, Cameroon
Certifications
NOVEMBER 2022 - NOVEMBER 2025
AWS Solutions Architect – Associate
Amazon Web Services
SEPTEMBER 2022 - SEPTEMBER 2025
AWS Certified SysOps Administrator – Associate
Amazon Web Services
MARCH 2022 - MARCH 2025
AWS Certified Developer – Associate
Amazon Web Services
AUGUST 2013 - PRESENT
Oracle Certified Master, Java EE 5 Enterprise Architect
Oracle
APRIL 2013 - APRIL 2016
Certified Ethical Hacker (CEH)
EC-COUNCIL
APRIL 2012 - PRESENT
Oracle Certified Expert, Java EE 6 Enterprise JavaBeans Developer
Oracle
FEBRUARY 2012 - PRESENT
Oracle Certified Professional, Java SE 6 Programmer
Oracle
Skills
Libraries/APIs
REST APIs, OpenID, D3.js, Node.js
Tools
IntelliJ IDEA, Gradle, Apache Maven, Amazon Elastic Container Registry (ECR), Cron, Amazon EKS, Jenkins, Subversion (SVN), Git, PyCharm, Amazon Athena, Flyway, Grafana, Amazon Elastic Container Service (ECS), Helm
Languages
Java 8, Python, Java, SQL, Java SE (Core Java), JavaScript, HTML, HTML5, TypeScript, Web Services Description Language (WSDL), UML, Java 6, PHP, GraphQL, SAML
Frameworks
Spring 5, Spring Boot, Spring, Swagger, Hibernate, Angular, Django, JPA, Serverless Framework, OAuth 2
Paradigms
Serverless Architecture, DevOps, REST, Management, Penetration Testing
Platforms
Docker, AWS Lambda, Amazon Web Services (AWS), Amazon EC2, Kubernetes, Eclipse, Java EE (Jakarta EE), Heroku, Oracle, Apache Kafka, FusionAuth, AWS Elastic Beanstalk, Jupyter Notebook
Storage
Neo4j, PostgreSQL, Graph Databases, MySQL, Data Pipelines, Database Architecture, Amazon DynamoDB, Redis, Spring Data, NoSQL
Other
Software Design, Back-end, Architecture, Technical Diagrams, Software Architecture, Data Engineering, Application Security, Full-stack Development, Algorithms, APIs, CI/CD Pipelines, AWS Cloud Architecture, Full-stack, Technical Writing, Containerization, API Integration, Single Sign-on (SSO), Identity & Access Management (IAM), Technical Leadership, SOAP, Internet of Things (IoT), ETL Pipelines, Amazon RDS, Networking, Systems, Artificial Intelligence (AI), Bokeh, Amazon Comprehend, Data Mining, Spring Cloud, Leadership, Message Queues, Back-end Development, Serverless, OAuth, AWS Certified Developer, AWS Certified SysOps Administrator, Cloud, AWS Certified Solution Architect, Machine Learning, Minimum Viable Product (MVP), Multitenancy, Network Management
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