Full Stack Developer-Mobile

Job#: 3027487

Job Description:

Full Stack Application Developer

We are seeking a Full Stack Developer skilled in , NestJS, Prisma, PostgreSQL, and Expo/React Native to help build a new, custom refining application from the ground up. This contractor will develop both web and mobile features, working from requirements provided by the functional team. Work will include larger monthly deliverables along with smaller weekly items.

Title: Full stack Developer

Location: San Antonio TX (3 days onsite)

Duration: 6 month contract

Key ResponsibilitiesFull Stack Web Development

• Build and maintain web applications using React and .
• Develop backend services and microservices with NestJS.
• Implement data models and access layers using Prisma and PostgreSQL.
• Build reusable React components and integrate secure REST API flows.
• Optimize application performance, scalability, and reliability.

Mobile Development

• Develop cross‑platform iOS/Android applications using Expo + React Native.
• Implement navigation, deep linking, push notifications, and offline capabilities.
• Ensure smooth, consistent performance across platforms.

Collaboration & Delivery

• Work with functional teams to build defined features and requirements.
• Participate in design discussions, code reviews, and sprint planning.
• Troubleshoot, debug, and document architecture, APIs, and components.

Required Skills

• Strong experience with React (web) and React Native (mobile).
• Hands‑on experience with , NestJS, Prisma, and PostgreSQL.
• Proficiency in TypeScript across front‑end and back‑end.
• Experience building high‑performance applications used by many users.
• Experience developing for both iOS and Android.

Nice to Have

• Experience with Docker or Podman (focus area, but not required for screening).
• Understanding of Zustand, automated testing tools (Jest, RTL), or CI/CD pipelines.
• Background developing applications for refinery or industrial operations.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide.