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Mithun Joshua

@mithung

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Java backend developer specializing in secure, scalable microservices for banking and fintech.

India

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What I'm looking for

I am seeking backend/Java roles in fintech or banking where I can design secure, standards-compliant APIs and microservices, work with strong engineering teams, and grow in security and integration domains.

I am a Java backend developer with 2.8+ years of experience building secure, compliant microservices for banking and fintech platforms, delivering integrations for clients such as JPMC, QNB, AUB (KFH), and Bank ABC. I specialize in Java (8/17/21), Spring Boot, Open Banking standards (OBIE, Berlin Group), and security protocols including mTLS, JWT, JWS, and Keycloak.

I have implemented Confirmation/Verification of Payee flows, high-throughput payment APIs, and reconciliation workflows, and have experience with databases (MySQL, PostgreSQL, MSSQL), messaging (Kafka), and tooling like Docker and GitLab. I focus on reliability, standards compliance, and secure designs that support multi-tenant fintech and banking environments.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Banfico LTD

Jul 2024 - Present (1 year 5 months)

Built secure, compliant backend microservices for Confirmation of Payee / Verification of Payee and Open Banking integrations, enforcing mTLS, private key JWT, JWS and SSO for 25+ banking clients including JPMC and QNB.

Spring Boot Keycloak mTLS JWT OpenResty Microservices SSO PostgreSQL Docker Java Jira Gitlab Open Banking Standards OAuth OAuth 2.0 OAUTH2

Associate Software Engineer

PayTabs Global

Jan 2024 - May 2024 (4 months)

Developed high-performance payment APIs handling up to 10K transactions/min, implemented card issuance integrations for KSA/UAE/Egypt clients and built end-of-day reconciliation workflows using Spring Batch.

Java Spring Boot MySQL MSSQL REST APIs Performance Tuning Reconciliations Docker

Software Engineer Trainee

Likemind Technologies Pvt Ltd

Apr 2023 - Jan 2024 (9 months)

Built automated background verification workflows using Quartz Scheduler and developed 30+ REST APIs to improve processing efficiency and system reliability.

Java Spring Boot REST APIs Quartz Scheduler MySQL Hibernate JPA Microservices OAUTH2 OAuth 2.0

Java Intern

Wipro Ltd

Mar 2022 - Jul 2022 (4 months)

Led a team of 5 to build a CRUD-based Flight Management System with live flight data integration using PostgreSQL, improving search and booking workflows.