Mouhamad is available for hire
Hire MouhamadMouhamad Thiam
Verified Expert in Engineering
Back-end Developer
Thies, Thiès Region, Senegal
Toptal member since October 23, 2021
Bio
Mouhamad is a full-stack developer focused on the back end. During his nine years of experience in building and delivering solutions for financial and travel industry clients, he became an expert in creating, exposing, and consuming APIs using Python, FastAPI, Django, JavaScript, and Node.js. Mouhamad is interested in technology innovations such as distributed ledger technology and its applications and enjoys creating solutions that work as inclusion tools and give access to minorities.
Portfolio
Cidemia SAS
Agile Project Management, IT Management, Planning, Python 3, FastAPI, MongoDB...
Sonatel
Java, Elastic APM, Kibana, OpenShift, Key Performance Metrics, Metrics...
Tentamus
Groovy, Full-stack, Java, SQL, Grails, Microsoft SQL Server, React, Webpack...
Experience
- JavaScript - 6 years
- MySQL - 5 years
- Python - 5 years
- FastAPI - 4 years
- PostgreSQL - 3 years
- MongoDB - 3 years
- TypeScript - 2 years
- Node.js - 2 years
Availability
Full-time
Preferred Environment
Linux, IntelliJ IDEA, Python, JavaScript, TypeScript, MacOS, Docker, REST, APIs, Git
The most amazing...
...thing I've developed as a team lead is a booking and ticketing engine for flights with CRM, accounting, insurance, and communication modules.
Work Experience
Founder and CEO
2023 - 2024
Cidemia SAS
- Developed APIs for a vote results gathering and reporting app.
- Defined the way the company works and wrote different documents related to it (ground rules, decision-making process, meetings, manuals, etc.).
- Managed projects and people around them by leveraging the skills needed to achieve our goals.
Technologies: Agile Project Management, IT Management, Planning, Python 3, FastAPI, MongoDB, Object-relational Mapping (ORM), OpenAPI, OAuth 2, OAuth, Starlette, NoSQL, Git, CSS, HTML, API Design, GitHub, Back-end Development, API Development, JSON
Application Performance Specialist
2023 - 2023
Sonatel
- Polished 10 different KPIs with thresholds that are used to study the performance of their applications.
- We created dashboards in the observability platform (Kibana) with alerts that we use to visualize and monitor application performance. The alerts were automated, and stress on resources was prevented with the use of ML.
- Proposed some recommendations after some studies, with implementation samples and guidelines. They mainly focused on some best practices to reduce resource consumption and effective costs on their platform.
Technologies: Java, Elastic APM, Kibana, OpenShift, Key Performance Metrics, Metrics, Spring Boot, Nexus, Apache Maven, NoSQL, Git, Algorithms, Full-stack, Full-stack Development, Microservices Architecture, GitHub, JSON
Full-stack Developer
2022 - 2022
Tentamus
- Created the development process with source code versioning, CI/CD, documenting, and other DevOps steps. Started with a source code in a zip file shared with me and finished with a versioned project that was ready and easy to set up by any new developer.
- Made a dedicated database for app-related data. The original app relied on an external database handled by another application to read data from there and save it to JSON files. Migrated it to its own database.
- Created a sync process using Quartz to collect data from the existing external database. This was useful, for example, when a new user was created in the external app.
- Enhanced the app's security by migrating the authentication mechanism from in-house encryption to a standard hash function. I also added some security policies, such as maximum login attempts, reset passwords, and authentication token emails.
- Developed an analytics database from the production database. I started developing a data aggregation module that will populate aggregated data in a datawarehouse.
- Developed a trending app based on UX/UI guidelines from a professional designer using a Figma app. Used React and Highcharts to create charts that integrated with the existing app (scatter plot, histogram, column chart, pie chart, etc.).
Technologies: Groovy, Full-stack, Java, SQL, Grails, Microsoft SQL Server, React, Webpack, Tailwind CSS, Highcharts, Object-relational Mapping (ORM), OAuth 2, OAuth, Git, Algorithms, Full-stack Development, CSS, HTML, API Design, GitHub, Back-end Development, API Development, JSON, Bash
Engineering Lead
2020 - 2022
Rocketrip
- Developed a sustainability module that estimates CO2 emissions for the clients' past and current trips, helping to offset the harm they did to the planet by presenting reliable dashboards.
- Created a module for travel restrictions that helps travelers determine what to expect when traveling or passing through countries regarding COVID-19 tests, quarantine, vaccinations, visas, and other mandatory documents.
- Took over an existing project by participating in the knowledge transfer and handover. Fixed several bugs and implemented new features and settings to make the app more suitable to the client's needs.
Technologies: Python, Django, FastAPI, GraphQL, MySQL, RabbitMQ, Redis, Celery, React, Apollo, Lerna, Linux, IntelliJ IDEA, TypeScript, Databases, Web Development, Computer Architecture, Node.js, Express.js, MongoDB, JSON Web Tokens (JWT), Docker, APIs, API Documentation, API Integration, SQL, Back-end, Agile, Agile Project Management, REST APIs, Technical Leadership, Pydantic, Solution Architecture, Amazon Web Services (AWS), Object-relational Mapping (ORM), OpenAPI, OAuth 2, SAML, Python 3, OAuth, Starlette, NoSQL, Git, Test-driven Development (TDD), Algorithms, Full-stack, Full-stack Development, CSS, HTML, Web Scraping, AWS IoT, Microservices Architecture, API Design, GitHub, Selenium, Automation, Back-end Development, API Development, Bash
Back-end Lead
2020 - 2020
Mondee
- Developed the tour packages to permit integration into the TripPro app with the search, booking, ticketing, and payment features for tours and hotels.
- Created a car rental module integrated with the TripPro app, including the search, booking, ticketing, and payment features with a wide variety of options.
- Built a cruise module in the TripPro app with different search, booking, ticketing, and payment features.
Technologies: JavaScript, Node.js, Express.js, MongoDB, Mongoose, Linux, IntelliJ IDEA, TypeScript, Databases, Web Development, Computer Architecture, JSON Web Tokens (JWT), REST, APIs, API Documentation, API Integration, SQL, Back-end, Agile, Agile Project Management, Architecture, REST APIs, Technical Leadership, Pydantic, Solution Architecture, Amazon Web Services (AWS), Object-relational Mapping (ORM), OpenAPI, OAuth 2, Python 3, OAuth, NoSQL, Git, Test-driven Development (TDD), Algorithms, Full-stack, Full-stack Development, CSS, HTML, Microservices Architecture, API Design, GitHub, CI/CD Pipelines, Back-end Development, API Development, JSON
Back-end Lead
2019 - 2020
Cosmopolitan Travel Service
- Developed a Python portable package importable to several projects, interfacing with GDS providers and consuming their APIs.
- Created a portal as an accounting, searching, booking, and ticketing engine for flights.
- Developed a CRM module to handle customers and their parameters when using the platform.
- Built an insurance module to strengthen our existing app.
Technologies: Python, FastAPI, Django, JavaScript, Node.js, Express.js, Vue 2, Swagger, MongoDB, PostgreSQL, SQLAlchemy, Mongoose, TypeScript, JSON Web Tokens (JWT), Unicorn, PI Development, Heroku, GitHub Actions, Eureka, Linux, IntelliJ IDEA, Databases, Web Development, Computer Architecture, Redis, Celery, Docker, REST, APIs, API Documentation, API Integration, SQL, Back-end, Agile, Agile Project Management, Architecture, REST APIs, SOAP, Technical Leadership, Pydantic, Solution Architecture, Amazon Web Services (AWS), Object-relational Mapping (ORM), OpenAPI, OAuth 2, Python 3, OAuth, Starlette, NoSQL, Git, Test-driven Development (TDD), Algorithms, Full-stack, Full-stack Development, CSS, HTML, AWS IoT, Microservices Architecture, API Design, GitHub, CI/CD Pipelines, Back-end Development, API Development, Vue, JSON, Bash
Senior Engineering Consultant
2018 - 2019
MNS Consulting
- Led the engineering team to build a single portal app for the Government of Congo to comply with the doing business report, simplifying the company creation process.
- Studied and proposed a fingerprint authentication app.
- Mentored other junior developers and handled the parts of our infrastructure.
Technologies: Java, Spring Boot, OpenLDAP, PostgreSQL, MongoDB, Thymeleaf, JSON Web Tokens (JWT), Eureka, Camunda BPM, Apache Maven, Nexus, Jenkins, Ansible, Supervisord, Docker, REST, APIs, API Documentation, API Integration, SQL, Back-end, Agile, Agile Project Management, Architecture, REST APIs, Technical Leadership, Solution Architecture, Object-relational Mapping (ORM), OpenAPI, OAuth 2, OAuth, NoSQL, Git, Test-driven Development (TDD), Full-stack, Full-stack Development, CSS, HTML, Microservices Architecture, API Design, GitHub, CI/CD Pipelines, Back-end Development, API Development, JSON, Bash
Chief of Development Unit
2017 - 2018
Sensoft
- Acted as the lead of all finance-related projects in the company; built a transversal knowledge across multiple parts of that field.
- Created an NFC card reader and writer module used for several projects, handling basic inputs and outputs, data encoding, encryption, and security.
- Integrated a mobile payment solution in an existing app, allowing small businesses to handle billing, payments, and reports.
- Built an API gateway agent deployed and configured in the client infrastructure, transforming database access to RESTful API. It mapped the saved procedures to endpoints and exposed them.
- Created a KYC microservice with anti-money laundering and terrorist financing capabilities, which is used by wallet, card, and core banking systems.
- Integrated and enhanced the security module to comply with the law regarding the OTP and password rules for an existing core banking system.
Technologies: Java, Spring, RabbitMQ, MySQL, Near-field Communication (NFC), Android, Grails, Groovy, APIs, API Integration, SQL, Architecture, Solution Architecture, Object-relational Mapping (ORM), SQLite, Oracle, Git, Test-driven Development (TDD), Algorithms, Full-stack Development, Mobile, CSS, HTML, API Design, CSV File Processing
Project Manager
2017 - 2017
Sensoft
- Developed and supervised the implementation of a bank mobility project—ACEP Fekkisila. Interacted with a core banking system database under Oracle and offered mobility features regarding the client, loan, and transaction via an Android app.
- Implemented an on-site fund collection automation project with FUCCEC Togo and a link with the database under SQL server; agents could recover funds by going directly to the clients.
- Contributed to the technical implementation of a project named "Small Savings Digitization" with Asusu SA in Niger. Helped agents collect savings from small commerce tenders.
Technologies: Agile Project Management, SQL, SQLite, Oracle, Git
Lead Developer
2016 - 2017
Sensoft
- Developed a transactions module for a mobile app, having several transaction types such as sending, receiving, refund, cash in, and cash out.
- Created a back-office web app to monitor transactions and apply constraints.
- Integrated the transaction reports and dashboard for each level, including the cashier, supervisor, network admins, and platform admins.
Technologies: Java, JavaScript, Grails, Groovy, Android, SQL, Back-end, Object-relational Mapping (ORM), SQLite, Git, Test-driven Development (TDD), Algorithms, Full-stack, Full-stack Development, Mobile, CSS, HTML, Automation, Back-end Development, CSV File Processing
Senior Full-stack Developer
2015 - 2016
Sensoft
- Acted as the principal developer working directly with the lead developer. Refactored an existing app and developed new features.
- Built an accounting core module for a money transfer app. This module mimicked the accounting plan and tracked and handled how the money is moved between different transactions' accounts.
- Developed a settings module for a money transfer app for all entities involved in money transfer, such as platforms, networks, and distributors.
Technologies: Java, Grails, Spring MVC, MySQL, SQL, Object-relational Mapping (ORM), SQLite, Git, Test-driven Development (TDD), Algorithms, Full-stack, Full-stack Development, Mobile, CSS, HTML
Experience
Card Management System for Refugees
The app aimed to help refugees—UNHCR—pay their allocation quickly.
I built an Android app, a back end and back-office web app for the card management system, that completed an existing wallet app. I used NFC technology and fingerprints to authenticate the users and Excel import to set up amounts in the back office for beneficiaries. We enabled the Android app to have offline balances and perform verification in non-connected environments with a sync mechanism.
I built an Android app, a back end and back-office web app for the card management system, that completed an existing wallet app. I used NFC technology and fingerprints to authenticate the users and Excel import to set up amounts in the back office for beneficiaries. We enabled the Android app to have offline balances and perform verification in non-connected environments with a sync mechanism.
Flight B2B Booking Engine
A microservices app refactored from an existing monolith offering the CRM, booking, ticketing, and insurance features to B2B travel agencies.
My tasks involved proposing the actual architecture, leading the team, building the entire authentication microservice, and other project parts.
My tasks involved proposing the actual architecture, leading the team, building the entire authentication microservice, and other project parts.
Small Savings Digitalization
Small savings are a part of the economy in rural and some urban regions of sub-Saharan countries.
I led the project and provided an end-to-end digitization solution, offering the agents a mobile app and connecting directly with the core banking system.
I led the project and provided an end-to-end digitization solution, offering the agents a mobile app and connecting directly with the core banking system.
Money Transfer App
Clinker is a local and international money transfer solution that helps the noneducated and low-banked rural population.
It has a mobile and web application and includes several transaction types:
• cash-to-cash (adapted to rural areas)
• cash-to-account (deposits, bill payments)
• account-to-cash (cash out, salary payments)
• account-to-account (wire transfers)
As principal and then lead developer, I was involved in every part of the project. I used to develop Android for the mobile app. I also added an NFC module to read cards from mobile and make transactions over them.
It has a mobile and web application and includes several transaction types:
• cash-to-cash (adapted to rural areas)
• cash-to-account (deposits, bill payments)
• account-to-cash (cash out, salary payments)
• account-to-account (wire transfers)
As principal and then lead developer, I was involved in every part of the project. I used to develop Android for the mobile app. I also added an NFC module to read cards from mobile and make transactions over them.
Education
2014 - 2015
Postgraduate Degree in Computer Science
Gaston Berger University - Saint Louis, Senegal
2013 - 2014
Master's Degree in Computer Science
Gaston Berger University - Saint Louis, Senegal
2012 - 2012
Bachelor's Degree in Computer Science
Gaston Berger University - Saint Louis, Senegal
2009 - 2011
Associate Degree in Mathematics and Computer Science
Gaston Berger University - Saint Louis, Senegal
Skills
Libraries/APIs
Pydantic, API Development, Node.js, SQLAlchemy, REST APIs, OpenAPI, React, Vue 2, OpenLDAP, Highcharts, Vue
Tools
Git, GitHub, IntelliJ IDEA, RabbitMQ, Mongoose, Celery, Lerna, Eureka, Camunda BPM, Apache Maven, Jenkins, Ansible, Supervisord, Webpack, Kibana
Languages
Python, Python 3, HTML, JavaScript, TypeScript, GraphQL, Unicorn, Java, Groovy, SQL, SAML, CSS, Bash
Frameworks
JSON Web Tokens (JWT), OAuth 2, Express.js, Swagger, Alembic, Starlette, Grails, Selenium, Django, Spring Boot, Thymeleaf, Spring, Spring MVC, Tailwind CSS
Paradigms
REST, Test-driven Development (TDD), Microservices Architecture, Agile Project Management, Agile, Object-relational Mapping (ORM), Automation, Concurrent Programming, Key Performance Metrics
Platforms
Docker, Linux, MacOS, Oracle, AWS IoT, Heroku, Android, Nexus, OpenShift, Amazon Web Services (AWS), Mobile
Storage
Databases, MySQL, PostgreSQL, JSON, MongoDB, SQLite, NoSQL, Redis, Microsoft SQL Server
Other
Software Engineering, Web Development, Data Structures, FastAPI, APIs, API Integration, Full-stack, OAuth, Algorithms, Full-stack Development, API Design, Back-end Development, CSV File Processing, Computer Architecture, API Documentation, Back-end, Architecture, Technical Leadership, Solution Architecture, CI/CD Pipelines, Distributed Systems, Algebra, Programming, Information Systems, Statistics, Mathematical Analysis, Apollo, PI Development, GitHub Actions, Near-field Communication (NFC), SOAP, Elastic APM, IT Management, Planning, Metrics, Web Scraping
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