Technical Team Lead

About Melli Gold
Melli Gold is a fintech startup operating at the intersection of the gold market and financial technology. We design and develop an intelligent and secure infrastructure for sourcing, trading, and managing gold flows in Iran.

Role overview:
As a Java Tech Lead, you will lead the Java/Backend team and contribute to designing and developing scalable, stable, secure, and reliable services. In this role, in addition to architectural decision-making and solving complex technical challenges, you will oversee development standards and service quality and help team members grow.

This role has a strong focus on Payment and Financial Services; therefore, a solid understanding of financial transactions, Consistency, Reliability, Security, and Scalability is essential.

Responsibilities:

• Lead the Java and Backend team and provide solutions for complex technical problems
• Design and review the architecture of Backend and Microservice services
• Participate in key architectural decisions and technology selection
• Define and improve standards for Architecture, Coding, Testing, and Code Review
• Perform Code Reviews and ensure code quality, security, and maintainability
• Identify and manage Technical Debt
• Review service Performance and Scalability and propose improvements
• Contribute to designing and implementing High Availability and Fault Tolerant services
• Troubleshoot Production issues and participate in Root Cause Analysis
• Contribute to designing and developing Payment and Financial Services
• Design and implement Idempotency mechanisms and prevent Duplicate Transactions and Double Spending
• Design and manage Retry, Timeout, Callback, and Webhook processes
• Contribute to designing Reversal, Failed Transaction, and Refund processes
• Contribute to designing Ledger, Wallet, and related financial account services
• Pay attention to Financial Consistency, Auditability, and Reconciliation processes
• Develop Backend services using Java and Spring Boot
• Design RESTful APIs and internal services and implement complex Business Logic
• Implement Unit Tests and Integration Tests and build testable, maintainable services
• Design and implement Event-Driven Services and work with message brokers such as Kafka or RabbitMQ
• Design Retry and Dead Letter mechanisms and manage Message Duplication and Ordering
• Contribute to designing Distributed Systems considering Eventual Consistency and Failure Handling
• Follow Secure Coding principles and design secure APIs
• Collaborate with the Security team to identify and fix vulnerabilities and meet security requirements for financial and payment services
• Mentor and transfer knowledge to team members and help Senior and Mid-Level Developers grow
• Participate in interviewing and hiring Backend engineers
• Break down complex problems into executable tasks
• Work closely with QA, Security, DevOps, Product, and other technical teams
• Participate in Technical Planning, technical estimation, and Sprint Planning
• Build a culture of Ownership and technical accountability within the team

Requirements:

• Education preferably in Computer Engineering / Software
• Relevant experience at Senior level and experience leading Java and Backend teams
• Strong proficiency in Java (preferably versions 17 or 21)
• Strong knowledge of Java concepts including Collections, Generics, Stream API, Exception Handling, Multithreading, and Concurrency
• Good understanding of JVM and Memory Management
• Strong proficiency in Spring Boot, Spring Web, Spring Data JPA, Hibernate, and Spring Security
• Strong proficiency in Spring Transaction Management and Spring Actuator
• Strong proficiency in PostgreSQL or similar databases
• Advanced SQL skills, Database Design, Query Optimization, and Indexing
• Understanding of Isolation Level, Transactions, Deadlocks, and Locking
• Solid understanding of Consistency in financial transactions
• Experience designing Backend, Microservice, and Distributed systems
• Ability to analyze complex problems and provide reliable technical solutions
• Technical leadership, mentoring, and knowledge transfer skills
• Ability to collaborate effectively with technical and business teams