Senior Software Engineer (Contract)

Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients.  Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability.

We are seeking a Senior Software Engineer to help design, build, and scale backend systems and platform capabilities that power high-traffic digital products and operational workflows. This is a hands-on engineering role focused on building reliable, maintainable, and scalable production systems while contributing to long-term architectural direction and engineering best practices. The ideal candidate is a strong backend engineer with deep experience building and operating distributed systems at scale. You should be comfortable working across the full software development lifecycle, from architecture and implementation to observability, deployment strategy, and operational support. This role also requires strong collaboration skills, mentorship capabilities, and the ability to work effectively in modern AI-assisted engineering environments.
Experience within ecommerce, subscription platforms, fulfillment systems, or billing ecosystems is highly preferred.

• →Design, develop, and maintain scalable backend services and platform capabilities
• →Write clean, maintainable, and performant production-grade code
• →Contribute to architectural decisions and help evolve platform and system design
• →Build internal tooling and automation to improve engineering efficiency and developer workflows
• →Participate in code reviews and maintain high engineering quality standards
• →Help define and improve best practices around testing, observability, CI/CD, and software delivery
• →Collaborate closely with product managers, designers, and cross-functional engineering teams
• →Troubleshoot production issues and improve platform reliability and operational performance
• →Mentor and support less experienced engineers through technical guidance and coaching
• →Advocate for pragmatic technical solutions that balance scalability, maintainability, and delivery speed
• →Contribute to engineering culture through experimentation, collaboration, and continuous improvement
• →Leverage AI-assisted development tools and workflows while maintaining strong engineering judgment and code review discipline

• 6+ years of professional software engineering experience building and operating production systems at scale
• Strong backend engineering experience with Java, Python, or similar object-oriented programming languages
• Experience designing and building distributed systems, APIs, and scalable backend architectures
• Strong understanding of software design patterns, system reliability, and performance optimization
• Experience working with cloud platforms such as AWS, GCP, or Azure
• Experience with CI/CD pipelines, automated deployments, and modern development workflows
• Strong understanding of observability practices including logging, monitoring, and tracing
• Experience working within agile or hybrid software development environments
• Ability to mentor engineers and contribute to technical leadership initiatives
• Strong communication skills with the ability to explain technical concepts to both technical and non-technical stakeholders
• Experience working with AI-assisted development workflows, including reviewing and validating AI-generated code

• Experience within ecommerce, subscription, billing, or fulfillment platforms
• Experience with React or modern frontend frameworks
• Experience with domain-driven design principles
• Experience building AI-powered applications, LLM integrations, or agent-based workflows
• Experience with infrastructure automation and developer tooling
• Experience improving engineering productivity through automation and AI enablement

• Candidates must be authorized to work in and be located in Mexico.