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Senior Java Engineer L2 - Core Java, Concurrency & JVM - Financial Services

Join a large-scale financial services platform , supporting business-critical systems with high standards of reliability, security, and performance.

Play a key role in the ongoing modernization of enterprise Java applications , including:

Migrating legacy Java services to modern Java versions (Java 17 / Java 21)

Refactoring existing codebases to improve scalability, performance, and maintainability

Contributing to architectural evolution toward modern, cloud-native patterns

Design and enhance high-performance backend systems , supporting both new features and platform evolution.

Collaborate directly with senior client stakeholders in a highly autonomous, client-facing environment.

Contribute to platform stability by participating in production-related activities , while keeping development and modernization as the primary focus.

Qualifications

Your Skills and Experience

Strong hands-on experience with Java in enterprise-scale systems , ideally within regulated or high-availability environments.

Proven experience working with modern Java versions , including Java 17 and Java 21 .

Solid understanding of Core Java fundamentals , including:

Java Collections Framework (List, Set, Map, concurrency-aware collections)

Object-oriented principles and enterprise design patterns

Strong background in concurrency and multithreading , including:

ExecutorService , thread pools, synchronization strategies

Designing thread-safe, high-performance systems

Experience optimizing backend performance across:

REST APIs

SQL queries and data access layers

Microservices interactions and data processing flows

Strong understanding of REST API concepts , including:

methods, status codes, idempotency

API versioning, error handling, and performance considerations

Hands-on experience implementing security best practices , including:





Authentication and authorization with Spring Security

OAuth and JWT

Proven experience in JVM analysis and tuning , including:

Memory management and garbage collection

Thread dumps vs. heap dumps : when to use each and how to analyze them

Performance troubleshooting using tools such as JConsole, JVisualVM, or similar

Understanding and practical use of JMX

Local debugging and remote debugging of Java applications

Structured debugging methodologies for production and non-production environments

Familiarity with basic Unix/Linux commands for troubleshooting and system inspection.

Solid understanding of build and dependency management , including:

Maven concepts (lifecycle, dependencies, plugins, profiles)

Familiarity with NoSQL databases , with MongoDB preferred.

Understanding of event-driven architectures , including Kafka or similar messaging platforms .

Experience working in AWS-based environments (strong plus), with exposure to multi-cloud or hybrid cloud environments as a bonus.

Strong communication skills , able to explain technical decisions and findings clearly in discussions with senior stakeholders.

Set Yourself Apart With

Experience modernizing enterprise Java platforms in financial or regulated industries.

Demonstrated JVM tuning and performance optimization work.

Background designing high-throughput, secure, event-driven backend systems .

Exposure to cloud-native, multi-cloud, or hybrid architectures.

Comfort leveraging AI tools to improve engineering productivity.

Experience working directly with senior stakeholders in client-facing roles.

Company Description

We’re looking for a Senior Java Engineer to join a large-scale financial services platform in the middle of an active Java modernization journey . In this role, you’ll help migrate and evolve legacy systems toward modern Java (17/21) and cloud-native architectures on AWS , working on performance-critical, secure, and highly scalable services that run in production at scale.

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📌 Senior Java EngineerCore Java, Concurrency & JVM - Financial Services (Bogotá)
🏢 Publicis Sapient
📍 Bogotá