Senior Full Stack Engineer

***Positions posted by El Comeback are done on behalf of companies that we support in their search for candidates.***

Our client VAST is looking for a Senior Full Stack Engineer.

Salary Range: $115000$130000

Location: This is a hybrid role with three days each week expected to be onsite at our Chicago IL office.

ABOUT:

VAST builds the operating and financial backbone for fast-growing cash-intensive businesses combining hands-on execution with purpose-built software automation and AI-enabled workflows. We provide technology-enabled shared services financial infrastructure and operational support to partners across the U.S. and Puerto Rico with deep roots in route gaming and other multi-location businesses. Our teams work directly inside the operationshandling real cash flows real data and real constraintswhile designing systems that make the business faster and easier to scale. We focus on execution first: accurate books strong controls and dependable processes. From there we build automation software and AI-enabled workflows that eliminate manual work and raise the standard for how the back office operates.

YOUR MISSION:

As our Senior Full Stack Engineer youll be one of the founding members of our engineering team.

• Youll collaborate directly with leadership to build beautiful performant and reliable interfaces from the ground up.

• Were looking for someone who thrives in ambiguity loves to iterate quickly and is excited by the opportunity to make foundational technical decisions utilizing AI and other technologies to create immediate business value.

WHAT YOULL DO:

• System Architecture & Design: Define and evolve our technical architecture across the stackfrontend backend APIs data and cloud infrastructure.

• Technical Leadership: Set coding standards architectural patterns and best practices for engineering teams.

• Scalability & Performance: Ensure our systems are built to handle growth efficiently and reliably.

• Hands-On Development: Lead by example with high-quality code contributions across the stack.

• Cross-Functional Collaboration: Work closely with Product Design & Business Stakeholders to align on technical vision and deliver seamless experiences.

• Code Reviews & Mentorship: Uplevel the engineering team through mentorship knowledge sharing and thoughtful reviews.

• Technology Evaluation: Research and recommend new tools frameworks and practices to stay ahead of the curve.

REQUIREMENTS:

• 5 years of experience in full-stack development with 2 years in a start-up environment.

• Deep experience in both front-end and back-end frameworks (e.g. Vue TypeScript Tailwind and Laravel/PHP).

• Strong knowledge of cloud infrastructure (AWS Forge or Azure) and DevOps best practices.

• Proven track record designing scalable secure and maintainable systems.

• Ability to balance hands-on engineering with high-level architectural strategy.

• Excellent communication skills and a collaborative mindset.

WHY JOIN VAST

• Competitive salary performance bonuses

• Work with a fast-growing tech-forward company

• Direct impact on go-to-market success and company growth

***El Comeback is a non-profit program from ConPRmetidos that attracts and retains professional talent for Puerto Rico-based jobs. Register at to get matched with professional opportunities on the island.***

Salary Range: $115000$130000

WHY JOIN VAST

• Competitive salary performance bonuses

• Work with a fast-growing tech-forward company

• Direct impact on go-to-market success and company growth