Senior Fullstack Software Engineer (Go / React)

UNAVAILABLE; Argentina; Remote; ARS 2,400,000 - 4,200,000; Full time

Job summary

Bridgenext is looking for a Senior Full Stack Engineer to build a next-generation servicing tool. The core task is migrating functionality from a legacy Java and C#/.NET ecosystem into a modern REST and GraphQL architecture, with Go as the backend core and React on the frontend.

You will own complex full-stack initiatives, mentor engineers, and help shape technical direction. This remote role is open to candidates based in Argentina, with a strong emphasis on distributed collaboration and modern

Qualifications

• 8+ years of software engineering experience including Go and modern stacks.
• Experience with microservices and AWS infrastructure.
• GraphQL and REST API design and integration experience.
• Relational databases and automated testing knowledge.
• Ability to read legacy Java/C# code during migration.

Responsibilities

• Design scalable backend and frontend solutions.
• Participate in architectural design and technical decision-making.
• Develop APIs and complex integrations with GraphQL/REST.
• Own production quality, monitoring, and operational improvements.
• Collaborate across globally distributed teams.

Skills

Go

Java engineering experience

Microservices architecture

AWS experience

GraphQL

REST APIs

Relational Databases

Automated testing

Tools

CI/CD

GraphQL tooling

Job description

Company Overview

At Bridgenext, we engineer Growth Operating Systems. Most enterprises have spent millions on their revenue stack and still aren't seeing the growth they expected.They have tools that function, but no system that wins. We help growth-hungry companies close that gap by turning fragmented platforms, siloed teams, and disconnected data into one integrated Growth OS. More than a technology company or marketing agency, we're a global digital consultancy with experts in engineering, data, AI, creative and more.

Our teams are made up of experts who believe in engineering impact, starting with putting people at the center of everything we do. Every team member directly shapes our work, culture, and values. Nothing matters more to us than a kind, respectful, fulfilling environment that supports everyone. Our flexible, inclusive culture gives you the autonomy, resources, and opportunities to thrive.

Position Description

We are looking for a Senior Full Stack Engineer to build a next-generation servicing tool and platform. The primary goal is migrating functionality out of a legacy Java and C#/.NET ecosystem into a modern REST and GraphQL architecture. The role is backend-heavy, with Go as the core language, plus React on the frontend and GraphQL integration. Experience with Java and with reading legacy code to extract business logic is highly valued. The position requires 8+ years of software engineering experience, microservices, AWS, automated testing, and the ability to work independently

Own complex full-stack initiatives while mentoring engineers and helping shape technical direction. Senior Engineers are expected to engineer solutions, challenge assumptions, and drive technical excellence.

The project involves building a next-generation servicing tool and platform. A primary objective of this team is migrating existing functionality out of a legacy application ecosystem into a modern REST and GraphQL architecture.

Responsibilities include but are not limited to:

• Design and implement scalable backend and frontend solutions.
• Participate in architectural design and technical decision-making.
• Develop APIs and complex integrations.
• Own production quality, monitoring, and operational improvements.
• Collaborate effectively across globally distributed teams.

Workplace: This is remote role, open to candidates based in Argentina only.

Tech Stack:

• Go: Core language for modern API services and microservices
• React: Front-end user interface development
• REST APIs & GraphQL: Integration with GraphQL API layers
• AWS (EC2, ECS, CloudFormation, IAM, monitoring)
• CI/CD, automated testing and Agile delivery
• Legacy C#/.NET applications undergoing modernization
• HTML, CSS and JavaScript for UI customization
• Relational databases
• Microservices architecture

Must Have Skills:

• 8+ years experience in software engineering which includes:
  • Strong at Go
  • Java engineering experience is highly valuable
  • Experience working with Microservices architecture
  • AWS and infrastructure experience
  • GraphQL: Integration with GraphQL API layers
  • REST APIs: Full-stack integration connecting front-end tools with backend REST endpoints
  • Relational Databases
  • Automated testing

Preferred Skills:

• C# / .NET: Ability to read, navigate, and analyze legacy C# application code for migration purposes
• Java: Experience reviewing legacy Java backend systems to extract business logic during migration
• Data Integration: Experience working with REST-based data streams and integrations
• Experience working with globally distributed engineering organizations
• Experience supporting large-scale production systems

Professional Skills:

• Excellent English written and verbal communication skills
• Ability to work independently
• Excellent collaboration skills
• Strong analytical and problem-solving skills
• High standards of professionalism, consistently producing high quality results
• Self-sufficient, independent requiring very little supervision or intervention
• Passion for learning new technologies and staying current with industry trends

Bridgenext is an Equal Opportunity Employer