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Somnio SoftwareSS

Sr Fullstack Engineer

Somnio Software is a Flutter Development Company dedicated to creating top-notch Mobile and Web Applications.

Somnio Software

Employee count: 51-200

Argentina only

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We are looking for a Senior Full Stack Engineer, with a strong focus on Frontend development, to work on medium to high-complexity web applications.

This role requires deep hands-on experience in AngularJS 1.9, with a strong emphasis on maintaining, refactoring, and modernizing legacy frontend codebases while ensuring performance, stability, and business continuity. The engineer will actively contribute to incremental migration strategies toward modern frontend frameworks such as React, minimizing risk and disruption.

From a full-stack perspective, the role involves close collaboration with backend teams working with Node.js and MongoDB, contributing to API integration, data modeling discussions, and performance optimization. The position demands a holistic understanding of frontend, backend, and data layers, acting as a technical bridge between product requirements and engineering execution.

The ideal candidate is a hands-on senior engineer, comfortable working in cloud-based environments, with strong code quality standards and the ability to communicate effectively in English (B2 or higher) within international Agile teams.

Requirements

Must Have

  • Senior Experience: 5+ years of professional experience in software development, with a strong focus on frontend-heavy full stack web applications.

  • Frontend Expertise – AngularJS 1.9: Proven experience maintaining and evolving complex Angular 1.9 applications, including directives, scopes, digest cycle management, performance tuning, and legacy refactoring.

  • Frontend Modernization Mindset: Experience participating in gradual migrations from AngularJS to modern frameworks such as React, ensuring backward compatibility and business continuity.

  • Backend Development: Solid hands-on experience with Node.js, building and integrating REST APIs consumed by frontend applications.

  • Database Experience: Strong experience working with MongoDB, including data modeling, schema design, query optimization, and indexing strategies.

  • Full Stack Understanding: Ability to work across the entire application lifecycle, from frontend UI to backend services and data persistence.

  • Code Quality & Best Practices: Strong commitment to clean, maintainable, and scalable code, with experience in code reviews and shared quality standards.

  • English B2 or Higher (Verbal and Written): Ability to participate in technical discussions, document solutions, and collaborate with international stakeholders.

Nice to have

  • Backend Technologies: Experience with NestJS and structured backend architectures, including dependency injection and modular design.

    PHP Experience: Experience working with PHP in legacy or hybrid technology stacks.

  • Modern Frontend Frameworks: Hands-on experience with React, particularly in component-based architectures and migration scenarios.

  • Cloud & DevOps Exposure: Experience deploying and maintaining applications in cloud environments (Azure preferred), including CI/CD pipelines.

  • Testing & Tooling: Experience with testing frameworks such as Jest and solid Git-based workflows.

  • Agile Experience: Experience working in Agile/Scrum teams, collaborating with Product Managers, refinements, and estimations.

  • Mentorship: Willingness to support junior or mid-level engineers, especially around legacy frontend code and modernization efforts.

Quick Skills reference

  • Languages: JavaScript (ES6+), TypeScript, PHP

  • Frontend: AngularJS 1.x, React

  • Backend: Node.js, NestJS, Express

  • Database: MongoDB

  • Cloud / Tools: Azure, Docker, Git, CI/CD pipelines, Jest

Highlights


Apply now and let's transform our clients' ideas into the best solution we can build together 🚀

About the job

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Posted on

Job type

Contractor

Experience level

Senior

Location requirements

Hiring timezones

Argentina +/- 0 hours

About Somnio Software

Learn more about Somnio Software and their company culture.

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Our customers face the challenge of needing high-quality, cross-platform mobile and web applications that perform seamlessly across all devices. That is why we at Somnio Software have dedicated ourselves to becoming the first and only 100% Flutter-focused software development company in Latin America. We believe that the secret to digital success lies in combining a great tech stack with a superb, passionate, and professional team. By specializing in Flutter, we empower businesses to unlock rapid and cost-effective digital transformation, creating apps for mobile, web, desktop, and embedded devices from a single codebase.

We are more than just developers; we are 'Somniers'—a team of over 80 passionate engineers, designers, and strategists who work hand-in-hand with our clients to turn their innovative ideas into outstanding products. We prioritize the wellbeing and happiness of our team, fostering a collaborative environment where everyone has an equal say and thinks like an owner. Whether you are a startup or a large enterprise, we are committed to being your strategic technological partner, providing full product development and staff augmentation services that help you grow your business and achieve a before-and-after impact in your industry.

Employee benefits

Learn about the employee benefits and perks provided at Somnio Software.

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Team synergy

Engaging team building activities.

Wellbeing

We prioritize the wellbeing and happiness of our team.

Flexible hours

You can accommodate schedules in order to achieve planned goals.

Professional Growth

We promote the growth of the team through career plans and in-house trainings.

View Somnio Software's employee benefits
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Somnio Software

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