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Fintech Developer Jobs in Delaware (NOW HIRING)

Monitise

Lead AI Engineer

Wilmington, DE · On-site

$186K - $285K/yr

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way ... developer tools that improve quality, productivity, and delivery velocity * Deliver technical ...

Mondo

Lead Software Engineer

Wilmington, DE · On-site

Mondo is seeking a Lead Software Engineer to drive development initiatives across a customer-facing ... fintech industry experience • Experience within enterprise SaaS or customer-facing product ...

Monitise

Mainframe Sr. Advisor

Wilmington, DE · On-site

$121K - $193K/yr

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way ... As a Software Development Engineering - Sr Advisor I, you will play a critical role in leading the ...

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Fintech Developer information

See Delaware salary details

$40K

$129.5K

$158.6K

How much do fintech developer jobs pay per year?

As of Aug 15, 2026, the average yearly pay for fintech developer in Delaware is $129,460.00, according to ZipRecruiter salary data. Most workers in this role earn between $106,100.00 and $157,100.00 per year, depending on experience, location, and employer.

What are the common challenges faced by fintech developers in their daily work?

Fintech Developers often deal with challenges such as keeping up with rapidly changing financial regulations, ensuring data security and privacy, and integrating complex legacy systems with new technologies. They may also need to troubleshoot and optimize code for reliability and scalability in high-transaction environments. Working in cross-functional teams with product managers, financial analysts, and compliance officers requires strong collaboration skills. These factors make adaptability and continuous learning important for long-term success in this role.

What is a fintech developer?

A Fintech Developer is a software engineer who specializes in building financial technology applications, such as digital payments, banking platforms, trading systems, and blockchain solutions. They work with programming languages like Python, Java, or JavaScript and use APIs, cloud services, and security protocols to create secure and efficient financial systems. Their role involves designing, developing, testing, and maintaining applications to meet the evolving needs of the financial industry.

What are the key skills and qualifications needed to thrive as a fintech developer?

To thrive as a Fintech Developer, you need strong programming skills (often in languages like Python, Java, or C#), a solid understanding of financial systems, and usually a degree in computer science or a related field. Familiarity with financial APIs, cloud platforms, databases, and certifications such as Certified FinTech Professional (CFTE) can be valuable. Strong problem-solving abilities, attention to detail, and effective teamwork and communication skills help you excel in this role. These skills are crucial for building secure, scalable, and compliant financial technology solutions in a rapidly evolving industry.

How much do fintech developers make?

Fintech developers typically earn between $80,000 and $150,000 annually, depending on experience, location, and skill set. Senior developers with expertise in blockchain, cybersecurity, or data analysis can earn higher salaries, especially in competitive markets or with specialized certifications.

What are popular job titles related to Fintech Developer jobs in Delaware?

For Fintech Developer jobs in Delaware, the most frequently searched job titles are:

What job categories do people searching Fintech Developer jobs in Delaware look for?

The top searched job categories for Fintech Developer jobs in Delaware are:

Fintech Developer jobs near you
Infographic showing various Fintech Developer job openings in Delaware as of August 2026, with employment types broken down into 78% Full Time, 7% Part Time, and 15% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $129,460 per year, or $62.2 per hour.

.net Senior developer

SLK America Inc.

Wilmington, DE • On-site

$52.75 - $69.75/hr

Other

Posted 29 days ago

Job description

Senior .NET Full Stack Developer emphasizing backend for platform integrations and payments processing in our core banking systems. You''ll drive secure, scalable solutions for transaction workflows, third-party gateways, and regulatory-compliant payment platforms.

Key Responsibilities

  • Develop backend services in .NET Core/8+ for payments processing, including ISO 20022/SWIFT message handling, real-time rails (FPS, RTP), and full lifecycle from initiation to settlement/reconciliation.
  • Integrate platforms with bank APIs, third-party gateways (e.g., Visa, ACH), SFTP/XML/JSON feeds, and microservices using ASP.NET API, gRPC, and queues like RabbitMQ.
  • Contribute full stack with Angular/React frontends for payment dashboards, while optimizing SQL Server/NoSQL for high-volume financial data and ensuring PCI-DSS compliance.
  • Manage CI/CD via Azure DevOps, Docker/Kubernetes deployments, performance tuning, and monitoring with Application Insights for production stability.
  • Lead code reviews, agile collaboration with fintech teams, and troubleshooting for payments and integration issues.

Required Qualifications

  • 8+ years .NET backend experience, including 4+ years in payments/integration (ISO 20022, SWIFT MT/MX, SEPA, Open Banking).
  • Expertise in C#, async APIs, Entity Framework, secure auth (OAuth/JWT), and cloud (Azure/AWS) for scalable financial apps.
  • Strong SQL, message processing, error handling, and regulated environments; full stack basics (Angular/TypeScript).

Preferred Skills

  • Banking payments (ACH, wire, RTP), event sourcing, and DevOps tools (Terraform, ELK).
  • Certifications: Microsoft Azure Developer Associate.

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