Mid-Level Application Developer

Rebel Talent Systems; Maryland; Hybrid; USD 90,000 - 120,000; Full time

Benefits offered by this job

Medical plans

401(k) plans

Professional development

Paid time off

Paid holidays

Job summary

Rebel Talent Systems is seeking a Mid-Level Application Developer to support government projects from a primarily remote setup with occasional in-person visits in the DC metro area. Candidates must reside in the DC region and be US citizens eligible for a Secret clearance.

You will implement backend fixes in Python, develop REST APIs with Flask or FastAPI, and improve the Vue.js-based UI while validating data through SQL queries. Travel for client engagements may be required.

Qualifications

• 2-4 years of Python, SQL, REST APIs experience.
• Experience with Git, code reviews, and automated testing.
• Familiarity with LLM coding assistants to investigate code and create tests.
• Bachelor’s degree in a US-accredited Engineering program.
• Eligibility to obtain a US SECRET security clearance.

Responsibilities

• Implement Python backend fixes and REST API integrations using Flask or FastAPI.
• Enhance the UI and user flows; improve data presentation and error states.
• Use SQL/graph queries to validate records and relationships.
• Build regression tests and document expected vs. actual results and defects.
• Maintain clear progress updates and technical documentation.

Skills

Python

SQL

REST APIs

Git

Testing

LLM coding assistants

Education

B.S. in Engineering

Tools

Word

Excel

PowerPoint

SharePoint

Job description

The Mid-Level Application Developer will support the development of emerging solutions designed to empower government clients. This is primarily remote with going into the office or meeting with customers a few times per quarter. Must live in the DC metro area. Must be a US Citizen to support US Government programs and be eligible for a Secret clearance.

Responsibilities:

Implement scoped Python backend fixes and REST API integrations using Flask or FastAPI.

Improve the Vue.js interface, including answer presentation, citations, tables and error states

Use SQL and graph queries to validate records, relationships and financial fields; trace issues

across retrieval, backend responses and UI rendering

Build regression tests and document expected versus actual results, evidence, defects and

remaining limitations

Maintain focused code changes, technical documentation and clear progress updates.

Support controlled validation and releases

Adhere to and report on technical milestones and the overall project schedule

Participate in and support internal and external engagements including client meetings,

conferences, and industry days

Evaluate operational deficiencies, recommend improvements, and coordinate their

implementation

Attend meetings and program reviews, assist with compiling presentations, written materials,

and/or electronic communications as required

Travel domestically and internationally, provide in-person support at client sites, and

obtain and maintain professional certifications and security clearances as required.

Qualifications:

2-4 years of experience developing applications using Python, SQL, REST APIs, and related

technologies

Experience in practical data validation and debugging

Experience with Git, code reviews, automated testing and the ability to explain and verify code

changes

Experience using LLM coding assistants such as Claude Code, ChatGPT or Codex to investigate

code, plan changes, implement fixes and create tests

Proficiency using Microsoft Word, Excel, PowerPoint, and SharePoint

Eligibility to obtain a DOD SECRET security clearance

Bachelor’s degree in an Engineering discipline from an institution accredited in the United States

Excellent attention to detail, organizational skills, and ability to multitask

Strong verbal and written interpersonal, communication, and presentation skills

Compensation Policy:

Comprehensive medical plans (Aetna) with Employee Assistance Program (EAP), heath savings

and flexible spending accounts, and dental and vision coverage options

Opportunity to earn spot awards and annual, performance, and chargeability bonuses

Traditional and Roth 401(K) plans

Professional development including up to $1,500/year reimbursement for pre-approved

courses, trainings, continued education, and/or certifications

Paid Flexible Time Off

10 paid holidays

Equal Employment Opportunity Statement

The client is an Equal Opportunity / Aff…? ... ???