Senior Node.js Engineer

This is us

At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX, and Ul design, managed services, product development, and software development.

This is the job

We are seeking a Senior Node.js Engineer to join a cross-functional team building a mission-critical accounting and tax platform that handles payments and transaction processing. You’ll design, build, and maintain scalable, reliable backend services and serverless solutions as the platform migrates from on‑premises to a cloud-native AWS architecture.

Working with Backend Engineers, a Tech Lead, QA Automation, and Product Managers, you’ll influence technical decisions, improve architecture, and ensure traceability across accounting and tax workflows.

This is you

• 5+ years of hands-on development with Node.js and TypeScript;

• Practical knowledge of AWS services, including: Lambda, Step Functions, DynamoDB, EventBridge, SQS, SNS, and S3;

• Proven experience designing and developing serverless architectures;

• Extensive background with Serverless Framework (deployment and configuration);

• Experience with automated testing using Jest;

• Solid knowledge of event-driven architectures and common integration patterns;

• Experience working in Agile environments and participating in sprint ceremonies;

• Strong analytical and problem-solving skills, and a commitment to code quality;

• Languages: Spanish — native; English — intermediate.

Nice-to-have skills:

• Background in financial services, accounting, taxation, or payments systems;

• Experience migrating applications and services to cloud environments (lift-and-shift, re-architecture);

• Knowledge of observability, monitoring, and troubleshooting tools in AWS (CloudWatch, X-Ray, OpenTelemetry);

• Experience with high-availability, transaction-intensive systems and their resilience patterns.

This is your role

• Design, develop, and maintain scalable backend services using TypeScript and Node.js;

• Participate in migrating applications and services from on-premises infrastructure to AWS;

• Build and maintain serverless solutions following cloud-native best practices;

• Implement integrations and processing workflows for accounting, tax, payments, and transaction data;

• Collaborate closely with Product, QA, and Engineering to deliver high-quality features;

• Write and maintain automated and unit tests (Jest);

• Participate in code reviews and promote engineering best practices and maintainable design;

• Monitor, troubleshoot, and optimize application performance, reliability, and security;

• Ensure traceability and auditability across business processes and generate accounting/tax files.

At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.