Hire the Best Payment Processing Specialists in California

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Normandie S.

Murrieta, California

$20/hr
5.0
3 jobs

Organized, Detail-Oriented Virtual Assistant & Creative Problem-Solver Are you looking for a highly organized, self-motivated professional to streamline your workflow and bring efficiency to your business? I specialize in administrative support, time management, and customer service, ensuring that operations run smoothly while you focus on what matters most. What I Offer: ✔️ Administrative support (email & calendar management, data entry, workflow organization) ✔️ Customer service (professional and courteous client communication) ✔️ Project coordination & problem-solving (helping bring ideas to life efficiently) ✔️ Creative input (content organization, social media assistance, and brainstorming solutions) Why Work With Me? ✔️ Detail-oriented & proactive – I anticipate needs before they arise ✔️ Time management expert – I help optimize productivity ✔️ Strong communicator – Attentive, professional, and courteous ✔️ Problem-solver – I enjoy tackling challenges with efficiency Let’s discuss how I can help make your business more organized and productive! Please send me a message, and let’s get started.

  • Data Entry
  • Microsoft Excel
  • Canva
  • Microsoft Word
  • Shopify
  • HR & Business Services
  • Typing
  • Business
  • Customer Service
  • Administrative Support
  • Business Management
  • Microsoft Outlook
  • Microsoft Access
Alberto L.

Anaheim, California

$10/hr
5.0
1 jobs

I help businesses streamline their accounts payable and accounting processes with accuracy, efficiency, and attention to detail. With 6+ years of experience, I specialize in invoice processing, vendor management, account reconciliations, expense management, month-end close support, and financial reporting. I also implement and optimize accounting tools like Ramp to improve workflows, strengthen controls, and save valuable time.

  • Payment Processing
  • Bookkeeping
  • Accounting Basics
  • Accounting
  • Account Reconciliation
  • Account Management
  • Accounts Payable
  • Accounts Receivable
  • Invoicing
Omer M.

Anaheim, California

$25/hr
5.0
1 jobs

I’m a healthcare billing professional with over four years of experience in claim submission, payment posting, and denial management. I help clinics, private practices, and healthcare providers improve their revenue cycle by keeping claims accurate and reimbursements on time. I’ve worked with both private and government payers and have strong knowledge of payer rules, HIPAA compliance, and EHR systems such as ZOLL EHR. I also completed a Bachelor’s in Healthcare Administration from Western Governors University, where I gained additional training in healthcare operations and compliance. If you need reliable support for your billing process, claims follow-up, or payment reconciliation, I can help you stay organized and get results quickly.

  • Payment Processing
  • Medical Billing
  • Revenue Cycle Management
  • Insurance Verification
  • Process Improvement
  • Microsoft Excel
  • Microsoft Outlook
  • Microsoft Word
  • Data Entry
  • HIPAA
Bhavesh D.

San Francisco, California

$75/hr
4.5
296 jobs

CRO | CTO | STRIPE CONNECT | STRIPE BILLING | STRIPE RADAR | STRIPE API | STRIPE CHECKOUT | STRIPE TERMINAL | FINTECH | SAAS | AI | PAYMENTS | COMPLIANCE ( PCI DSS, GDPR) CRO | Meta Ads | Google Ads | ROAS | CAC XERO | QUICKBOOKS | ACCOUNTING SOFTWARE INTEGRATION FRACTIONAL CTO SERVICES | SCALABLE MVP DEVELOPMENT | REMOTE TEAM LEADERSHIP | TECHNICAL ROADMAPPING | STRIPE CONSULTING & DEVELOPMENT | AI | AUTOMATION Fractional CTO | 17+ Years IT Leadership | FinTech & Healthcare | Scalable MVPs | Stripe & Payments Expert I bring 17+ years of experience in technology, 10 years in FinTech and 2 years in AI—leading startups from concept to scale. As a Fractional CTO, I specialize in architecting investor-ready MVPs, building and managing remote engineering teams, and aligning technical roadmaps with business milestones. My approach balances speed-to-market with the long-term stability investors expect. As a Certified Stripe Expert, I’ve delivered 200+ projects across SaaS, eCommerce, and healthcare, helping founders design, integrate, and optimize payments that drive revenue and meet global compliance standards. Beyond Stripe, I manage full product lifecycles, ensuring delivery on time, within budget, and aligned with growth objectives. I’m also passionate about AI-driven automation, applying conversational AI, intelligent bots, and no/low-code workflows to simplify operations and create scalable, cost-efficient systems. What I Offer: Fractional CTO leadership & technical roadmapping Stripe consulting, integration, and optimization Scalable MVP development with investor alignment End-to-end project & product management (Agile/Scrum) AI-powered automation for payments, SaaS, and operations If you’re looking for a CTO who blends deep technical expertise with executive strategy, I’d be glad to help shape and scale your product. SKILLS: ✓✓✓ Payment Gateway Integrations ✓✓✓ Payment Gateway Migrations ✓✓✓ Technical Roadmapping ✓✓✓ Startup Fundraising Support ✓✓✓ Cloud Architecture (AWS, GCP, Azure) ✓✓✓ Remote Team Leadership ✓✓✓ SaaS Architecture ✓✓✓ Healthcare Technology (HIPAA, HL7, FHIR) ✓✓✓ FinTech Compliance (PCI DSS, PSD2) ✓✓✓ Scalable MVP Development ✓✓✓ Vendor Management ✓✓✓ AI Software Development ✓✓✓ AI Agent Development ✓✓✓ No/Low Code Development • STRIPE • PAYPAL • Authorize.net • 2 Checkout • Sage Pay • Square • WorldPay • RazorPay • WeChat Pay • iDeal • Klarna • QuickBook TaxJar • Xero • AI • ChatGPT • LangChain Tech Stack & Leadership Capabilities ✓ DevOps & Infrastructure: CI/CD pipelines, Docker, Kubernetes, infrastructure-as-code (Terraform, Ansible), monitoring & observability (Datadog, Prometheus, Grafana). ✓ Cybersecurity & Compliance: Identity and access management, encryption standards, SOC2 & GDPR compliance, penetration testing oversight. ✓ Data & Analytics: Data pipelines, ETL, real-time processing (Kafka, Spark), business intelligence dashboards. ✓ Mobile Oversight: iOS/Android (Swift, Kotlin, React Native, Flutter) – leadership & architectural guidance. ✓ Scalability & Reliability: Microservices architecture, high availability (HA), disaster recovery (DR), event-driven systems. ✓ Product Strategy: Product-market fit, UX/UI oversight, customer-driven roadmaps, investor milestone alignment. Core Development Expertise: ✓ Languages & Frameworks: Python, Java, Node.js, Next.js, PHP, Java EE (Servlet, JSP, EJB, Hibernate, Spring). ✓ Web & CMS: WordPress, WooCommerce. ✓ Databases: MySQL, Oracle. ✓ Cloud: AWS, GCP, Azure. ✓ OS: Linux, Windows. ✓ Front-End: JavaScript, jQuery, AJAX, Node.js. ✓ APIs & Integrations: REST APIs, ChartMogul, Twilio, Mailchimp, HubSpot, Facebook Graph, Google Maps, Twitter. ✓ Video Handling: Cloudflare Stream (direct upload, processing, secure playback). ✓ Tooling & Automation: Jenkins, MQ, Agile/Scrum workflows.

  • Payment Processing
  • Stripe
  • Payment Gateway Integration
  • PayPal Development
  • Payment Plugin
  • Payment Gateway
  • Payment Functionality
  • Payment Integration Framework
  • Mobile Payment Functionality
  • Point of Sale & Payment Systems
  • PayPal
  • Stripe API
  • Stripe SDK
  • Google Ads
  • Conversion Rate Optimization
Junaid A.

Los Banos, California

$25/hr
5.0
2 jobs

Highly experienced and certified Medical Billing & Coding Specialist with proven expertise in managing end-to-end revenue cycle processes and electronic health record (EHR) systems. I bring precision, confidentiality, and a results-driven approach to medical claims processing, insurance verification, and patient data management. With industry-standard certifications and hands-on experience in revenue cycle management, I help healthcare providers reduce claim denials, improve billing accuracy, and maximize reimbursements. My commitment is to deliver reliable services with fast turnaround, clear communication, and strict attention to detail. What I specialize in: ✔ Medical coding (ICD-10, CPT, HCPCS) ✔ Insurance claims submission & follow-up ✔ Electronic Health Record (EHR) management ✔ Revenue cycle & practice management ✔ Denial resolution & appeals processing ✔ Patient scheduling & billing data entry ✔ HIPAA-compliant workflows Why choose me: 🔹 Accuracy-focused — reducing coding errors & costly denials 🔹 Communication-driven — clear, timely updates and reporting 🔹 Client-centric — tailored solutions for small and large medical practices 🔹 Confidential & secure handling of medical records Let’s work together to streamline your medical billing process and keep your practice financially healthy and organized. Message me to get started! 🔹 Top Skills ✔ Medical Billing & Coding ✔ Electronic Health Records (EHR) ✔ Revenue Cycle Management ✔ Insurance Verification ✔ Denial Management ✔ Claims Submission ✔ Medical Terminology ✔ Customer Support & Data Entry

  • Payment Processing
  • Medical Billing & Coding
  • Electronic Medical Record
  • Medical Mastermind Medical Billing Services
  • Customer Support
  • Medical Records Research
  • Electronic Funds Transfer
  • Customer Support Plugin
  • Online Chat Support
  • Revenue Management
  • Data Entry
  • Call Scheduling
  • Front Desk
  • Appointment Scheduling
  • Phone Support
April G.

Groveland, California

$12/hr
5.0
1 jobs

Reliable and detail-oriented Customer Support and Operations Specialist with 10+ years of hands-on experience in high-volume customer service, retail, and food service environments. Trusted with store leadership, team training, and accurate inventory management in fast-paced settings.

  • Payment Processing
  • Virtual Assistance
  • Customer Service
  • Customer Retention
  • Inventory Management
  • Administrative Support
  • Team Training
  • POS Terminal
  • Sales & Inventory Entries
  • Point of Sale & Payment Systems
  • Management Skills
  • Quality Assurance

How it works

Post a job for freePost a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a Payment Processing Specialist in California on Upwork?

You can hire a Payment Processing Specialist in California on Upwork in four simple steps:

  • Create a job post tailored to your Payment Processing Specialist project scope. We'll walk you through the process step by step.
  • Browse top Payment Processing Specialist talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top Payment Processing Specialist profiles and interview.
  • Hire the right Payment Processing Specialist for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a Payment Processing Specialist?

Rates charged by Payment Processing Specialists on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Payment Processing Specialist in California on Upwork?

As the world's work marketplace, we connect highly-skilled freelance Payment Processing Specialists and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Payment Processing Specialist team you need to succeed.

Can I hire a Payment Processing Specialist in California within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Payment Processing Specialist proposals within 24 hours of posting a job description.