Senior Java Engineer

Avenga

. Design, develop, and maintain high-scale microservices, data models, and integration patterns for core backend solutions .

Posted 9/22/2026full-timeRemote • ArgentinaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing high-scale microservices and robust REST APIs, with a strong focus on AWS cloud infrastructure and payment systems. Proven ability to manage end-to-end technical solutions and optimize high-availability, low-latency systems in the fintech industry.

Highest-signal resume keywords

Java Backend DevelopmentMicroservices ArchitectureAWS Cloud InfrastructureCI/CD Pipeline ManagementPayment Systems Expertise

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

MicroservicesREST API DevelopmentHigh-Availability SystemsLow-Latency SystemsDatabase Query OptimizationAWS LambdaAWS EKSAWS ECSAWS DynamoDBAI-Assisted Development Tools

Tools & Technologies

CI/CD RoutinesContainerizationEvent-Driven Data FlowsAWS CloudWatchAWS DMS

Industry Keywords

FintechPayment PlatformsAcquiring DomainIssuing DomainPromotional Environments

Tech Stack

Tools & technologies

AWSCloudDynamoDBJavaMicroservicesRuby on Rails

About the role

Key responsibilities & impact

Design, develop, and maintain high-scale microservices, data models, and integration patterns for core backend solutions
Drive initiatives and propose simple, effective architectural solutions aligned with system needs and product goals
Take full ownership of end-to-end technical solutions from design to production rollout
Secure and optimize high-availability, low-latency systems and database queries processing volume-heavy financial operations
Build, deliver, and continuously evolve robust REST APIs
Own end-to-end deployment workflows, managing pipelines and CI/CD routines across containerized and non-containerized setups
Leverage AWS services to support distributed architectures and event-driven data flows
Incorporate advanced AI-assisted development tools into daily engineering workflows
Build and evolve high-availability payment platforms and optimize critical payment rails within the fintech industry

Requirements

What you’ll need

6+ years of strong experience working with Java and building resilient backend services
Background in deployments, CI/CD pipelines, and microservices, both with and without containers
Solid experience developing high-availability, low-latency systems and designing robust REST APIs
Practical, hands-on knowledge of payment systems, with a strong focus on acquiring or issuing domains
Proficient working with AWS cloud infrastructure, including Lambda, EKS, ECS, SQS, SNS, EventBridge, DynamoDB, and API Gateway
Strong understanding of microservices architecture and integration patterns
Active adopter of AI agents and development assistants used daily for designing, generating, and continuously improving code quality
Previous experience working in promotional environments or within acquirer processors
Familiarity with AWS tools like CloudWatch and DMS

Benefits

Comp & perks

Equal opportunities in recruitment, career development, and leadership
Diverse and inclusive work environment
Fully remote work arrangement
Career development opportunities
Talent and technical interview process to explore goals, experience, culture, and ways of working