Software Developer

Job not on LinkedIn

🕒 November 9, 2025

🐊 Florida – Remote

🐊 Florida – Remote

💵 $75k - $100k / year

⏰ Full Time

🟡 Mid-level

🟠 Senior

🧑‍💻 Full-stack Engineer

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Paynuity

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2017

💳 Fintech

🏦 Banking

🤝 B2B

Fintech • Banking • B2B

Paynuity is a global payments and banking infrastructure provider that offers full-service, scalable solutions for card issuing, payment processing, digital banking, and fraud/risk management. The company provides integrated payment integrations, multi-currency acceptance, card lifecycle management, AI/ML underwriting, rewards programs, and merchant services to banks, merchants, and fintech partners. Paynuity positions itself as an outsourced, end-to-end ecosystem to enable customers to issue credit and debit cards, accept payments worldwide, and manage risk and compliance.

📋 Description

• The Full Stack Developer is responsible to help define and design the requirements, UI/UX, construction, integration, testing, verification and maintenance of unit tests and core application code for the models, views, and controllers of our API-based services. • As a full stack development engineer in the payment technology team, you will help lead, design, enhance and build our services for Customers in an agile development environment. • You will start out learning our systems from the ground up, helping to develop secure applications and refactoring existing .NET 2/4 web forms. • Work closely with stakeholders and UXUI to produce applications that flow seamlessly and work intuitively with our merchants, our banking clients, our partner affiliates, and cardholder customers. • Write optimized and quality code.

🎯 Requirements

• 5+ years’ experience in complex development environments including: • Hands-on knowledge of the .NET Framework (2.0, 3.5, 4.0 and/or 4.5+), including Visual Studio, TFS, C#, ASP.NET (Web Forms and Web API) • 5+ years’ experience working with Microsoft SQL Server AND MySQL/MariaDB/Percona. • Working with n-tier architectures (UI, Business Logic Layer, and Data Access Layer) along with some experience with service-oriented architectures (SOA). • Good understanding of Web technologies (HTML, JavaScript, jQuery and CSS) • Working knowledge of development tools such as source control (Source Anywhere, TFS, Subversion, build server, etc.) and continuous integration build practices. • Experience in designing secure applications and awareness of security implications from design to implementation phase of project. • Experience with PCI-DSS environments • Experience with performance analysis, profiling and optimization. • High initiative, self-motivation and drive to exceed expectations. • Proficiency in both oral and written communication.

🏖️ Benefits

• Paid Federal Holidays • PTO Accrual from Day One