The Senior Full Stack Engineer will play a critical role in designing, developing, and maintaining our company’s core business applications. We are looking for a true systems analyst who thrives on solving complex business challenges and translating them into robust, scalable, and high-performing technical solutions. This individual must be highly comfortable working with pure code without relying on frameworks, especially in areas where the company prefers clean, raw implementations. The ideal candidate should have strong foundational skills in vanilla JavaScript, pure PHP, and writing code from scratch without the support of abstractions or libraries.

You will work across both the front-end and back-end of modern web applications using PHP, MySQL, PostgreSQL, SQL, and React, collaborating with cross-functional teams to deliver efficient and maintainable systems. Strong English communication skills are essential for interacting with internal stakeholders, product owners, and developers across global teams.

What You Will Do

Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. The individual in this position will be expected, on a regular basis, to:

Design, develop, and maintain back-end functionality for enterprise-level business applications using PHP in pure form, avoiding unnecessary frameworks when required.
Build and enhance interactive, responsive front-end interfaces using vanilla JavaScript, along with React when applicable.
Develop and optimize databases using MySQL and PostgreSQL, including schema design, complex queries, indexing, stored procedures, and performance tuning.
Write clean, well-structured, and well-tested code without depending heavily on frameworks, ensuring clarity and maintainability.
Troubleshoot, debug, and optimize applications for speed, scalability, and long-term stability.
Participate in architectural discussions and contribute to decisions involving raw code structure, system design, and best practices.
Collaborate with engineers, product managers, and stakeholders to ensure the product is performant, reliable, and aligned with business goals.
Stay updated with evolving best practices in no-framework development, JavaScript, PHP, SQL, and full stack engineering.
Mentor and guide junior developers, especially in understanding code fundamentals and building solutions without relying on frameworks.
Prepare and maintain clear and detailed technical documentation.

What You Will Bring

Proven ability to write clean, well-documented, and well-tested pure code in both PHP and JavaScript (examples may be requested).
Strong knowledge of vanilla JavaScript, DOM manipulation, event handling, and building functionality without libraries.
Expertise in MySQL, PostgreSQL, and SQL, with hands-on experience designing and maintaining relational databases.
Proficiency with React or modern front-end frameworks, while still having the ability to work without them when needed.
Experience with object-oriented programming (OOP) and design patterns.
Excellent analytical, problem-solving, and debugging skills.
Strong English verbal and written communication skills.
Ability to clearly explain technical concepts to both technical and non-technical audiences.
Experience working in agile, team-based environments.
Knowledge of the logistics, supply chain, or transportation industry is a plus.
A strong sense of ownership, attention to detail, and a passion for writing beautiful code.
Comfortable working in a remote, fast-paced, globally distributed environment.

Minimum Qualifications

10+ years of experience in full stack development.
Hands-on experience with pure PHP, vanilla JavaScript, MySQL, PostgreSQL, SQL, and React in production environments.
Demonstrated ability to build solutions from scratch without relying on frameworks.
Proven experience leading complex projects from concept to deployment.
Strong understanding of SDLC principles and agile methodologies.
Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).