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wasif6029

Wasif

@wasif6029
Bangladesh
English, Bengali
About me
I’m a Java Spring Boot backend specialist who builds and stabilizes production APIs. I develop REST services with clean architecture, JPA/Hibernate, PostgreSQL/MySQL, Swagger/OpenAPI docs, and JWT/Spring Security. I also handle third‑party integrations (webhooks, payments) and performance issues like slow queries/timeouts. For urgent bugs, I reproduce the issue, find the root cause, apply a safe fix, and refactor the risky area without breaking behavior. You get clean commits/PRs, a short summary, and verification steps—so your backend is stable and release‑ready.... Read more

Skills

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wasif6029
Wasif
Offline • 

See my services

API & Integrations
I will build java spring boot rest apis with database and integrations
From$15 / projectMore details
Bug Fixes
I will urgently fix java spring boot backend bugs and refactor your code
From$10 / projectMore details

Work experience

Software Engineer

Brain Station 23 • Full-time

Feb 2023 - Present • 3 yrs 3 mos

Key Technologies Used: Java Spring Boot, Keycloak, MSSQL, Redis, Kafka, Docker, Jasper Reports, Elastic Search, Angular Project: Digital Wallet (Fintech solution) My Contribution: Developed robust microservices and REST APIs, considering design patterns and best practices with Spring Boot. Cut API time from 2 minutes to 20ms by optimizing queries and stored procedures. Reduced the number of DB calls with query refactoring. Implemented SSO across apps with Keycloak. Built a full-text search filter with Elasticsearch. Refactored code into libraries, cutting development time significantly. Improved query performance 80%+ with secondary indexes.