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Freelance Php Backend Developer Jobs in Washington

TIAG

Senior AI-ML Integration Software Engineer

Reston, VA · On-site

$150 - $200/hr

Integrate AI/ML capabilities into existing PHP backend API. * Create new build pipelines in ... Cloud & DevOps: AWS (EC2, RDS, S3, Lambda, API Gateway, Cognito, DynamoDB), Terraform, Git, Jenkins ...

Infojini Inc

Jr. Web Developer

Suitland, MD · On-site

Title: Jr. Web Developer Duration: Full time Location: Suitland, MD Client ... Direct Client The candidate needs to have strong backend coding experience. Experience in PHP ...

Veredus - DC

Drupal Developer

Washington, DC · On-site

... is looking to hire a Back-end Drupal Developer. This Develoer will partner closely with ... Qualifications * Experience with PHP OOP (Object-oriented Programming). * 2-3 years experience ...

Hirekeyz Inc

Software Developer SME

Fairfax, VA · On-site

This role emphasizes backend architecture, distributed systems, API development, and cloud-native ... Zend PHP Certified Engineer * Microsoft Certified Solutions Expert (MCSE) Security Clearance ...

Hirekeyz Inc

Senior Software Developer

Fairfax, VA · On-site

$55.75 - $73.50/hr

This role emphasizes backend architecture, distributed systems, API development, and cloud-native ... Zend PHP Certified Engineer * Microsoft Certified Solutions Expert (MCSE) Security Clearance ...

Ask IT consulting

Junior Web Developer

Alexandria, VA

... in Back-End Development (PHP, SQL, REST) Oracle 11G and above database development required. Object Oriented full lifecycle software design and development Works well in a team and is flexible in a ...

USM

Drupal Developer - Face to face must

Washington, DC

$45 - $50/hr

Drupal Developer Location: Washington, DC (Union Station) Duration: Dec 31st 2017 (potential to ... with PHP, Web Interface Design, connecting web front-ends to back-end databases and systems, and ...

CTAC

Jr. Drupal Developer

Falls Church, VA · On-site

... PHP modules, custom templates, security, and performance tuning. • Meet at the Daily Scrum to ... front-end / middle-tier / back-end coding perspectives • Understanding of Drupal Module ...

CTAC

Jr. Drupal Developer

Falls Church, VA · On-site

... / back-end coding perspectives. The candidate should have an understanding of Drupal Module ... PHP * MySQL * LAMP * JavaScript Desired Skills: * WordPress * PostgreSQL * Facebook Apps * Mobile ...

Cloud BC Labs

Java FSD Developer

Mclean, VA · On-site

$51.50 - $66.75/hr

Backend Development: Build and maintain server-side application logic using languages such as ... PHP, and manage database interactions with MySQL, PostgreSQL, MongoDB, or other database systems.

aqua IT

Software Developer

Springfield, VA · On-site

Design, develop, and deploy enterprise-scale backend services. * Architect and optimize secure ... such as Python, Go, JavaScript, PHP, C, C++, C#, Perl, or similar * Experience working ...

New

Infojini Inc

Drupal Developer

Columbia, MD

We offer an excellent compensation package We're looking for a talented developer to join our ... back-end development) Drupal modules (including Panels, Display Suite, Views, Context) PHP ...

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Freelance Php Backend Developer information

What does a freelance PHP backend developer do?

A Freelance PHP Backend Developer is a self-employed professional who specializes in building and maintaining the server-side of web applications using the PHP programming language. They are responsible for writing code that handles data storage, user authentication, APIs, and the overall logic behind a website or web app. Freelancers in this role often work with clients on a project-by-project basis, collaborating remotely and delivering customized backend solutions. Their work ensures that websites and applications are secure, efficient, and scalable.

What are the key skills and qualifications needed to thrive as a freelance PHP backend developer?

To thrive as a Freelance PHP Backend Developer, you need strong expertise in PHP programming, database management (like MySQL), and a solid understanding of web application architecture, often supported by a degree in computer science or equivalent experience. Familiarity with frameworks such as Laravel or Symfony, version control systems like Git, and deployment tools is highly valued, and certifications in PHP or cloud platforms can be advantageous. Excellent problem-solving skills, self-motivation, and clear client communication are essential soft skills for managing projects independently. These competencies ensure robust, scalable backend solutions and client satisfaction in a competitive freelance environment.

How do freelance PHP backend developers typically manage client communication and project expectations?

Freelance PHP backend developers often handle client communication directly, which requires clear and regular updates through email, project management tools, or virtual meetings. Setting realistic expectations about project timelines, deliverables, and revisions is crucial to building trust and ensuring smooth collaboration. Many freelancers use contracts or service agreements to outline project scope and avoid misunderstandings. Additionally, they may collaborate with frontend developers, designers, or other freelancers, making strong communication and organizational skills essential for successful project delivery.

What is the difference between Freelance Php Backend Developer vs Freelance Java Backend Developer?

AspectFreelance Php Backend DeveloperFreelance Java Backend Developer
Required CredentialsPHP certifications, web development experienceJava certifications, software development experience
Work EnvironmentWeb servers, CMS platforms, small to medium projectsEnterprise systems, large-scale applications, cloud environments
Employer & Industry UsageWeb agencies, startups, small businessesFinancial institutions, tech companies, large enterprises
Common Search & ComparisonYesYes

Freelance Php Backend Developers typically work on web-based projects using PHP, suitable for small to medium-sized applications. Freelance Java Backend Developers focus on enterprise-level systems and large-scale applications. The choice depends on project scope and industry needs.

What are the most commonly searched types of Php Backend Developer jobs in Washington?

The most popular types of Php Backend Developer jobs in Washington are:

What are popular job titles related to Freelance Php Backend Developer jobs in Washington?

For Freelance Php Backend Developer jobs in Washington, the most frequently searched job titles are:

What job categories do people searching Freelance Php Backend Developer jobs in Washington look for?

The top searched job categories for Freelance Php Backend Developer jobs in Washington are:

What cities in Washington are hiring for Freelance Php Backend Developer jobs?

Cities in Washington with the most Freelance Php Backend Developer job openings:

Freelance Php Backend Developer jobs near you
Infographic showing various Freelance Php Backend Developer job openings in Washington as of July 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 76% Physical, 5% Hybrid, and 19% Remote job distribution.

Senior AI-ML Integration Software Engineer

TIAG

Reston, VA • On-site

$150 - $200/hr

Other

Re-posted 8 days ago

Job description

Job Title: Senior AI/ML Software Engineer (Full-Stack)

Location: Reston, VA 20190 • Position Type: Full Time • Salary: $150,000 – $175,000 per year • Travel: None

TIAG is hiring a full‑stack Senior AI/ML Software Engineer to lead the integration of cutting‑edge AI and ML capabilities into our Department of War human performance platform. A U.S. or Naturalized citizenship and security‑clearance processing is required.

Responsibilities
  • Architect and deploy intelligent AI features. Build generative AI workflows, retrieval‑augmented generation (RAG), and agentic pipelines using cloud‑AI services.
  • Develop serverless backends (e.g., AWS Lambda, API Gateway) and microservices that interface with foundational machine‑learning models.
  • Optimize data‑ingestion pipelines and database queries (SQL and NoSQL) to support context‑rich AI prompts and high‑performance inference.
  • Set up, maintain, and secure automated CI/CD pipelines using Jenkins or cloud‑native tooling to support continuous deployment of software and ML integrations.
  • Define technical requirements, break down tasks for complex projects, and mentor junior developers on enterprise best practices.
  • Consolidate legacy processes and automate critical workflows to reduce manual workloads.
  • Incorporate AI‑driven features (predictive text, intelligent search, automated categorization, voice interfaces) into user‑facing web and mobile front‑ends.
  • Integrate AI/ML capabilities into existing PHP backend API.
  • Create new build pipelines in parallel with legacy tools and provide thought leadership to architecture, design, and modernization efforts.
  • Organize work plans, estimate tasks, and deliver finished projects on schedule.
Qualifications
  • 8–10 years of professional software development experience.
  • Front‑end: React, React Native, Polymer, JavaScript, HTML5, CSS3.
  • Back‑end: Strong proficiency in PHP8.x (Symfony), RESTful APIs, MySQL.
  • Cloud & DevOps: AWS (EC2, RDS, S3, Lambda, API Gateway, Cognito, DynamoDB), Terraform, Git, Jenkins CI.
  • Security: Experience working in secure environments governed by federal Department of War cybersecurity requirements.
  • AI Integration: Proven experience consuming, fine‑tuning, or orchestrating large language models within enterprise applications.
  • Preferred: AWS Bedrock knowledge, including API usage to manage foundation models, guardrails, or agent construction.
  • Data Pipelines: Experience with vector embeddings, prompt engineering, and cloud‑native NoSQL data stores.
Equal Opportunity Employment

TIAG is an equal opportunity employer and federal contractor or subcontractor. Employment decisions shall be based solely on merit and without regard to disability, protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations. TIAG takes proactive steps to employ and advance qualified individuals without regard to disability or protected veteran status.

Compliance with federal EEO laws and regulations including 41CFR60‑1.4(a), 60‑300.5(a), 60‑741.5(a), the Vietnam Era Veterans Readjustment Assistance Act of 1974, Section503 of the Rehabilitation Act of 1973, and Executive Order13496 is required.

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