Full Stack Software Engineer – Python/FastAPI

Apex Systems; Plano (TX); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

ESPP and 401K with match

HSA and EAP

Job summary

Everforth Apex is seeking a Full Stack Software Engineer in Plano, onsite, to own a FastAPI microservice and deliver end-to-end integration with an enterprise AI platform. You will lead backend development in Python with Pydantic data contracts and build frontend interfaces in React/TypeScript.

You will work across databases (MongoDB, SQL) and Redis, collaborating with AI engineers to add LLM-driven features. The role demands strong full stack ownership and production-grade delivery.

Qualifications

• 4+ years of full stack software engineering experience.
• Expert-level Python with production-ready, type-safe code.
• Hands-on FastAPI and Pydantic for microservices.
• Front-end proficiency: React, TypeScript, HTML, CSS.
• Experience with Node.js and web servers (Apache or equivalent).
• Databases across MongoDB, SQL, PostgreSQL/MySQL, Redis.
• Built and owned RESTful APIs in production environments.
• Experience with AI applications and LLM-powered services.

Responsibilities

• Own full lifecycle of a FastAPI microservice (design, tests, deployment, maintenance).
• Build and document RESTful APIs with FastAPI and Python; enforce data contracts with Pydantic.
• Develop front-end components using React, TypeScript, HTML, CSS.
• Integrate relational and NoSQL DBs (MongoDB, SQL, Redis) for persistence and caching.
• Collaborate with AI engineers to add LLM-driven features and agentic workflows.
• Contribute to broader microservices ecosystem with Node.js and Apache-backed services.
• Ensure secure, scalable, maintainable architecture across all layers.
• Identify technical debt and gaps; own workstreams to completion.
• Implement observability and monitoring for owned services.

Skills

Python

FastAPI

Pydantic

React

TypeScript

HTML

CSS

Node.js

Apache

MongoDB

SQL

PostgreSQL/MySQL

Redis

REST APIs

AI integration

LangChain (preferred)

LLM observability tools

Job description

Full Stack Software Engineer – Python/FastAPILocation: Plano, Texas (Onsite)

This role emphasizes full ownership of a FastAPI microservice integrated with an enterprise agentic AI platform. The position requires a self-sufficient full stack engineer with deep backend expertise who can identify scope, drive work independently, and deliver production-quality software. The successful candidate will own and lead the development, maintenance, and evolution of a core integration layer, designing and delivering both front-end and back-end components.

Key Responsibilities

• Own the full lifecycle of a FastAPI microservice: design, implementation, testing, deployment, and ongoing maintenance.
• Build and expose robust, well-documented RESTful APIs using FastAPI and Python, enforcing data contracts with Pydantic.
• Develop front-end interfaces and components using React, TypeScript, HTML, and CSS.
• Integrate with relational and NoSQL databases including MongoDB, SQL, and Redis for caching, persistence, and session management.
• Partner with AI engineers to incorporate LLM-driven features, agentic workflows, and AI model outputs into the microservice.
• Sserve Node.js and/or Apache-backed services as part of a broader microservices ecosystem.
• Ensure secure, scalable, and maintainable architecture across all layers of the stack.
• Proactively identify technical debt, architectural gaps, and new workstreams, owning them through to completion.
• Implement observability and monitoring instrumentation to ensure operational health of owned services.

Required Qualifications

• Experience: 4+ years of full stack software engineering experience.
• Expert-level Python with experience writing clean, production-ready, type-safe code.
• Hands-on experience with FastAPI and Pydantic for building and maintaining microservices.
• Proficiency in front-end development: React, TypeScript, HTML, and CSS.
• Experience with Node.js and web server technologies (Apache or equivalent).
• Database skills across multiple paradigms: MongoDB, SQL (PostgreSQL/MySQL), and Redis.
• Demonstrated experience building, consuming, and owning RESTful APIs in production environments.
• Experience working on or integrating with AI applications, including familiarity with LLM-powered services.

Preferred Qualifications

• Experience with LangChain and/or LangGraph for building or integrating agentic workflows.
• Familiarity with vector databases (e.g., Elasticsearch, Pinecone, Weaviate) and RAG patterns.
• Understanding of LLM behavior, prompt engineering, and context management.
• Experience with LangSmith or similar LLM observability and tracing tools.
• Background in data pipelines, streaming, or batch processing.
• Experience in enterprise or financial services engineering environments.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth 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 ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex Benefits Overview

• Everforth 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.
• Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan)
• SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions
• Corporate discount savings program and other discounts
• In terms of professional development, Everforth 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.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [e-mail] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

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