Senior Fullstack Developer, Javascript/Java

Coderio

. Lead the end-to-end development of high-impact fintech platforms .

Posted 11/12/2026contractRemote • ArgentinaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing high-impact fintech platforms with a focus on Java (Spring/Spring Boot), React, and AWS. Proven ability to design robust REST APIs and optimize database performance for high-volume financial applications.

Highest-signal resume keywords

Java (Spring/Spring Boot)ReactAWS (Amazon Web Services)High-Performance Relational DatabasesREST API Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaSpringSpring BootReactJavaScriptTypeScriptMySQLPostgreSQLDockerKubernetes

Soft Skills

AccountabilityFlexibilityTechnical Communication

Tools & Technologies

CI/CD PipelinesAI ToolsCoding Copilots

Industry Keywords

FintechPaymentsFinancial SystemsNoSQLDynamoDB

Tech Stack

Tools & technologies

AWSDockerDynamoDBJavaJavaScriptKubernetesMySQLNode.jsNoSQLPostgresReactSpringSpring BootSpringBootTypeScriptGo

About the role

Key responsibilities & impact

Lead the end-to-end development of high-impact fintech platforms
Design, code, and deploy high-volume, low-latency web applications
Ensure consistency across backend and frontend logic
Design and consume robust REST APIs integrating with acquirers, local banks, and Alternative Payment Methods (APMs)
Monitor and tune backend and database performance for massive international financial traffic spikes
Write clean, maintainable, highly testable code using unit and integration testing
Integrate code into automated CI/CD pipelines
Collaborate with technical teams to adopt AI tools and coding copilots into daily development workflows
Deliver scalable, high-quality solutions that drive measurable business results

Requirements

What you’ll need

Advanced English (written and spoken) is a strict must-have requirement for daily remote collaboration with global teams
Solid, proven experience using Java (Spring / Spring Boot) as the primary language for the core financial ecosystem
Advanced proficiency in React, JavaScript, TypeScript, and modern frameworks
Experience with high-performance relational databases such as MySQL or PostgreSQL, including complex query optimization
Hands-on experience working with AWS (Amazon Web Services) and container ecosystems (Docker / Kubernetes)
Strong soft skills: "Own it" mindset (accountability), flexibility to pivot in a dynamic fintech environment, and clear technical communication
Complementary experience with Node.js or Golang
Knowledge of NoSQL databases, specifically DynamoDB
Background in payments or financial systems

Benefits

Comp & perks

100% remote
Long-term commitment, with autonomy and impact
Strategic and high-visibility role in a modern engineering culture
Collaborative international team and strong technical leadership
Clear path to growth and leadership within Coderio
Inclusive, challenging environment with real opportunities for growth
Fair compensation