Senior Software Developer (P-131)

San Jose, San Jose, Costa Rica
Full Time
Experienced

SMASH, Who we are?

We are agents for tech professionals in Costa Rica and Colombia that help them build careers in the United States.

We believe in long-lasting relationships with our talent. We invest time getting to know them and understanding what they seek as their professional next step.

We aim to find the perfect match. As agents, we pair our talent with our US clients, not only by their technical skills but as a cultural fit. Our core competency is to find the right talent fast.

We purposefully move away from the “contractor” or “outsourcing” type of relationship. Our clients don’t want contractors or “just a service.” Neither does our talent.

Our Benefits

  • Wellness Coverage

  • Remote Work

  • Birthday day off

  • Recognition and rewards system

  • Referrals Program

  • Business skill coaching

  • English classes for Smashers and relatives

  • Learning opportunities

This position is Remote to work with a US Company; you will require to have Citizenship or a work permit from Costa Rica to apply for this role.

Role summary
You will design, develop, and maintain robust software solutions using C#, ASP.NET MVC, and SQL technologies. This position emphasizes back-end development while contributing to front-end functionality to deliver high-performance applications and scalable systems for enterprise use.

Responsibilities

  • Develop, test, and maintain applications using C#, ASP.NET MVC, and related Microsoft technologies.

  • Write complex SQL queries, stored procedures, and design efficient database structures.

  • Collaborate with cross-functional teams to define requirements and deliver technical solutions.

  • Implement clean, maintainable, and efficient code following best development practices.

  • Work with large data sets, ensuring data integrity, accuracy, and performance optimization.

  • Support front-end development using JavaScript, jQuery, HTML, and CSS.

  • Utilize Git or equivalent tools for source control and version management.

  • Deploy and maintain applications on Microsoft Azure environments.

  • Participate in code reviews, testing, and continuous improvement initiatives.

  • Create and maintain technical documentation for developed systems and processes.

Requirements – Must-haves

  • Proven experience as a Software Developer with strong proficiency in C#.

  • Expertise in SQL development (queries, stored procedures, database design).

  • Hands-on experience with ASP.NET MVC framework.

  • Working knowledge of JavaScript, jQuery, HTML, and CSS.

  • Experience handling large data sets and optimizing system performance.

  • Familiarity with Git or similar source control systems.

  • Experience deploying or supporting applications in Microsoft Azure.

  • Strong problem-solving, debugging, and analytical skills.

  • Ability to collaborate in a distributed and fast-paced development environment.

Nice-to-haves (optional)

  • Experience with Excel report automation or development.

  • Familiarity with BI tools such as Power BI.

  • Basic understanding of AI or Large Language Model (LLM) integrations.

  • Exposure to Agile development methodologies.

Languages

  • English B2+, Spanish C1

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