Sajjad Esmaeeli Email & Phone Number

Munich, Bavaria, Germany

United Kingdom

• Improved and Standardize the existing code structures to meet PSRs that leads to have a standard, human readable and testablesource code.• Modify database structure in order to increase the performance of the low speed queries.• Arranged technical documentation to clarify the actors, flows, scenarios and features of the software.• Engineered migration to AWS cloud platform in order to have scalable platform. During the exams, we had to handle a largeamount of simultaneously requests that would leads to have either high CPU/RAM usage or lack of service.• Redesigned the CI flow, from Jenkins to Github actions to remove the cost of maintaining Jenkins.• Implemented NodeJs realtime chat to replace the former approach that was implemented by a periodic calls. so it results insaving resources as well as eliminating the possibility of self DDOS attacks with the growth of active users.• Promoted to lead backend developer to be responsible for reviewing colleagues’ code, analyzing potential new features andthinking about better software architecture.• Mentored a junior developer to maximize the performance during fulfilling the tasks.

Hayward, California, United States

• Migrated to AWS cloud from on-premises infrastructure to maximize the user’s experience from any region in the US.• Manage to provide testable and standard codes with the usage of Solid principles and software design patterns.

Gilan Province, Iran

• Built a gaming matchmaking platform to match the player with the best equivalant rival. experienced to implement with theusage of PHP, Redis Pub/Sub, and nodeJS.• Mentored and Guided about 15 beginners/juniors to experience the new technologies, learn how to work in this field and learnbest practices.• Co-authored the design and development of web apps that use best practices and methodologies such as Service Layer,Dependency Injection, Repository Pattern, Dependency Inversion and Unit Testing.• Implemented, managed and consulted over 60 projects in the various fields like Real State Agencies, E-commerce, locationbased applications, educational and ...• Implemented the backend of PUB/SUB application using MQTT in order to reduce overhead of periodical calls from clients andminimize call counts, reduce significantly resource and network usage.

Melbourne, Victoria, Australia

• Implemented multi-currency wallet with the actions of Depositing and withdrawing currencies through API of gatewaypayments.• Established a connection to provide a consistent and reliable API trading platform to deal with Binance Markets.• Analyzed the migration from Digital Ocean monolithic Server(docker and jenkins) to AWS Cloud Platform in order to handle thehigh traffic on trading platform.• Switched to SocketIO base trading platform rather than Restful API to minimize the delay time of getting new prices andconversions from third-party API and making it realtime.• Dealing with race conditions in booking assets and fixed possible dead locks by the approach of queuing the orders and makethem sequential as well as made some changes to database to maximize efficiency.

Master Of Science - Ms, Computer Software Engineering, 19.56

Activities and Societies: Teaching Web Development, Publish a paperPublish a paper "Improve fetching information from different DBMS.

Bachelor Of Science - Bs (Software), Computer Software Engineering

Activities and Societies: Secretary of the (college) students' scientific association (Computer and Software Engineering), Teaching.