California's banking and fintech market requires software teams that understand financial workflows, security, integrations, and regulatory requirements. The companies below cover banking applications, core banking modernization, payments, lending, financial platforms, and related software engineering services, with California offices or established U.S. operations serving financial-sector clients.
1. Itexus
Itexus builds software for banking, fintech, payments, lending, trading, and wealth management. In banking, it handles mobile and online banking, digital account opening, KYC automation, and digital lending. It also works on payment infrastructure, card management, fraud monitoring, open banking, and core banking integration. Banks, fintech businesses, and other financial organizations across North America hire it to build and modernize digital financial products.
Key Facts
- Best for: Banks, fintech companies, and financial organizations building or modernizing digital products
- Core services: Banking software development, fintech development, mobile banking, lending, payments, digital wallets
- Specialization: Regulated financial products, complex integrations, legacy modernization
- Industries: Banking, fintech, payments, lending, wealth management, trading
- Location: United States, with services across North America
Contact Information
- Website: itexus.com
- Email: moc.suxeti@ofni
- Address: 8, The Green, STE road, Dover, DE 19901, USA
- LinkedIn: www.linkedin.com/company/itexus
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- Instagram: www.instagram.com/itexus.soft
2. BankInfra Technology
BankInfra Technology writes software for banks and financial services companies. From its Los Angeles base, it builds custom applications for banks and financial institutions. The team knows both banking and bank IT, so it can handle financial workflows, regulatory requirements, data security, and other needs specific to financial organizations.
Key Facts
- Best for: Banks and financial institutions needing specialized custom banking applications
- Core services: Banking software development, financial applications, consulting
- Specialization: Custom banking systems and financial workflows
- Industries: Banking and financial services
- Location: Anaheim, California
Contact Information
- Website: www.bankinfra.com
- Email: moc.arfniknab@leinad
- Phone: +1 213 739 7900
- Address: 1151 N Magnolia Ave #101-B, Anaheim, CA 92801, USA
3. Ultracs Corp
Ultracs Corp provides banking infrastructure and integrated banking systems to financial institutions. Its products cover core banking, digital banking, API connectivity, CRM, fraud prevention, and compliance. It also offers online lending, payments, cloud services, and professional support. The company is based in Irvine, California.
Key Facts
- Best for: Financial institutions modernizing banking infrastructure
- Core services: Core banking, digital banking, APIs, payments, lending, fraud prevention
- Specialization: Banking technology and integrated financial systems
- Industries: Banking and financial services
- Location: Irvine, California
Contact Information
- Website: ultracscorp.com
- Phone: (949) 561-1717
- Email: moc.procscartlu@seiriuqni
- Address: 15440 Laguna Canyon Road, Suite 120, Irvine, CA 92618, USA
- LinkedIn: www.linkedin.com/company/ultracscorp
- Twitter: x.com/UltracsC
4. Net Solutions
Net Solutions builds banking and financial software for financial institutions and fintech companies. It delivers secure digital platforms, fintech apps, lending systems, digital wallets, and KYC integrations. It also builds custom web and mobile apps and customer-facing banking experiences. From its Los Angeles office, it runs digital transformation projects around financial software and banking workflows.
Key Facts
- Best for: Financial institutions and fintech businesses modernizing customer-facing platforms
- Core services: Banking software, fintech development, digital wallets, lending, web and mobile applications
- Specialization: Customer-centric financial platforms and digital transformation
- Industries: Banking, fintech, financial services
- Location: Los Angeles, California
Contact Information
- Website: www.netsolutions.com
- Phone: +1 (416) 720-1790
- Email: moc.snoitulosten@selas
- Address: 11601 Wilshire Blvd, 5th Floor, Los Angeles, CA 90025, USA
- LinkedIn: www.linkedin.com/company/net-solutions
- Facebook: www.facebook.com/NetSolutionsHQ
- Twitter: x.com/netsolutions
5. Intellectsoft
Intellectsoft engineers software for banking and financial services. It builds online banking platforms and mobile banking apps, and handles banking security, UI/UX, and system integration. Its financial work also includes blockchain, cryptocurrency, and other fintech products. Intellectsoft has an office in San Francisco.
Key Facts
- Best for: Financial companies requiring custom digital banking and financial software
- Core services: Online banking, mobile banking, system integration, financial software development
- Specialization: Custom financial platforms and enterprise software
- Industries: Fintech, banking, insurance, financial services
- Location: San Francisco, California
Contact Information
- Website: www.intellectsoft.net
- Phone: +1 (650) 233-6196
- Email: ten.tfostcelletni@ofni
- Address: 2 Embarcadero Center, 8th Floor, San Francisco, CA 94111, USA
- LinkedIn: www.linkedin.com/company/intellectsoft
- Facebook: www.facebook.com/Intellectsoft
- Twitter: x.com/Intellectsoft
6. EPAM
EPAM builds financial and banking software for clients from fintech startups to established banks. Its banking work includes core banking systems, cloud banking, mobile banking apps, and payments. It also delivers loan management, regulatory solutions, and custom financial platforms. The company has an established presence in California.
Key Facts
- Best for: Banks and financial institutions undertaking large-scale modernization
- Core services: Core banking, cloud banking, mobile banking, financial software engineering
- Specialization: Enterprise financial technology and banking transformation
- Industries: Retail banking, commercial banking, wealth management, payments, fintech
- Location: San Joce and Los Angeles, California
Contact Information
- Website: epam.com
- Phone: +1-267-759-9000
- Address: 11601 Wilshire Blvd Suite 350 Los Angeles, CA 90025, USA
- LinkedIn: www.linkedin.com/company/epam-systems
- Facebook: www.facebook.com/EPAM.Global
- Instagram: www.instagram.com/epamsystems
7. Luxoft
Luxoft works on mission-critical financial software. It handles core banking transformation, KYC and client lifecycle management, risk and trading systems, and regulatory reporting. It also covers cloud, analytics, automation, and legacy modernization. Clients come from retail and commercial banking, investment banking, consumer lending, corporate treasury, wealth management, and market infrastructure.
Key Facts
- Best for: Financial institutions modernizing complex or legacy technology environments
- Core services: Banking software development, core banking transformation, cloud, analytics, QA automation
- Specialization: Mission-critical financial systems
- Industries: Retail banking, investment banking, lending, wealth management, capital markets
- Location: California and other U.S. markets
Contact Information
- Website: www.luxoft.com
- Phone: 1-866-305-4050
- LinkedIn: www.linkedin.com/company/luxoft
- Facebook: www.facebook.com/Luxoft
- Twitter: x.com/Luxoft
8. Simform
Simform is a San Francisco software development company that works with startups and enterprises in many industries, fintech among them. It builds custom applications, does cloud development and modernization, and offers product engineering. In finance, it has built software for business finance organizations.
Key Facts
- Best for: Fintech companies needing custom product engineering or modernization
- Core services: Custom software development, cloud, mobile applications, product engineering
- Specialization: Scalable digital products and enterprise applications
- Industries: Fintech, finance, healthcare, logistics, SaaS
- Location: San Francisco, California
Contact Information
- Website: www.simform.com
- Phone: 13212372727
- Address: 400 Executive Center Dr, Suite 208, West Palm Beach, FL 33401, USA
- LinkedIn: www.linkedin.com/company/simform
- Facebook: www.facebook.com/simform
- Twitter: x.com/simform
9. Orangesoft
Orangesoft builds fintech applications and financial software, taking products from first concept to scale-up. Its financial work includes fintech apps and payment processing systems built around security, compliance, and integration requirements. The company has a presence in San Francisco.
Key Facts
- Best for: Fintech startups and companies launching new financial applications
- Core services: Fintech app development, payment software, product development
- Specialization: Digital financial products and payment flows
- Industries: Fintech, finance
- Location: San Francisco, California
Contact Information
- Website: orangesoft.co
- Phone: +1-424-208-02-09
- Email: oc.tfosegnaro@olleh
- Address: 580 Howard St. 94105 San Francisco, CA, USA
- LinkedIn: www.linkedin.com/company/orangesoft
- Facebook: www.facebook.com/orangesoftmobile
- Instagram: www.instagram.com/orangesoft
10. TATEEDA
TATEEDA is a San Diego fintech software developer for financial businesses that need custom applications or engineering teams. It builds financial software, handles integrations and secure application engineering, and provides dedicated development teams. Its local operations make it a practical choice for California banking and fintech organizations.
Key Facts
- Best for: Fintech and financial organizations needing dedicated engineering expertise
- Core services: Fintech software development, custom applications, integrations, dedicated development teams
- Specialization: Financial technology and secure software engineering
- Industries: Fintech, banking, financial services
- Location: San Diego, California
Contact Information
- Website: tateeda.com
- Phone: +1 (858) 692-0660
- Email: moc.adeetat@ofni
- Address: 7220 Trade Street, Suite 103, San Diego, CA 92121, USA
- LinkedIn: www.linkedin.com/company/tateedaglobal
- Facebook: www.facebook.com/tateedaglobal
- Instagram: www.instagram.com/tateedaglobal
- Twitter: x.com/tateedaglobal
11. Bitcot
Bitcot builds custom fintech software for financial companies, focusing on digital banking, digital payments, and financial apps. It delivers banking apps, digital wallets, payment solutions, and custom fintech platforms. With offices in San Diego and Los Angeles, it works on financial software projects directly in California.
Key Facts
- Best for: Financial companies building digital banking and payment products
- Core services: Fintech software development, digital banking, digital payments, digital wallets
- Specialization: Custom financial applications and fintech platforms
- Industries: Fintech, banking, payments, finance
- Location: San Diego and Los Angeles, California
Contact Information
- Website: www.bitcot.com
- Phone: +1858-683-3692
- Address: 16870 W Bernardo Dr #400, San Diego, CA 92127, USA
- Email: moc.toctib@troppus
- LinkedIn: www.linkedin.com/company/bitcot
- Facebook: www.facebook.com/bitcot
- Twitter: x.com/bitcot
12. DigiNeat Smart Technologies
DigiNeat is a Los Angeles software engineering company that works in demanding fields such as fintech, banking, and trading. It engineers digital products from architecture and application development through long-term operation. It also supports infrastructure for regulated financial businesses and for financial operations across several jurisdictions.
Key Facts
- Best for: Fintech and banking companies with regulated software environments
- Core services: Digital product engineering, web and mobile development, backend systems
- Specialization: Regulated financial and trading technology
- Industries: Banking, fintech, trading, telecom
- Location: Los Angeles, California
Contact Information
- Website: digineat.com
- Phone: 1-800-993-1724
- Email: moc.taenigid@ofni
- Address: 1801 Century Park East, Los Angeles, CA 90067, USA
- LinkedIn: www.linkedin.com/company/digineat
- Facebook: www.facebook.com/p/DigiNeat-100063634393713
- Twitter: x.com/NeatDigi
13. Trantor
Trantor develops fintech software for financial businesses, including apps for payments, financial transactions, and other digital finance workflows. Its fintech team builds financial applications and custom software. The company has an office in Palo Alto.
Key Facts
- Best for: Fintech companies developing custom financial applications
- Core services: Fintech software development, financial applications, mobile solutions
- Specialization: Digital financial products
- Industries: Fintech and financial services
- Location: Palo Alto, California
Contact Information
- Website: trantorinc.com
- Phone: +1 (650) 646 7818
- Email: moc.cnirotnart@ofni
- Address: 2479 E Bayshore Rd, Suite 200, Palo Alto, CA 94303, USA
- LinkedIn: www.linkedin.com/company/trantor
- Facebook: www.facebook.com/Trantorinc
- Twitter: x.com/TrantorInc
14. Crea
Crea is a San Jose software development company that works in fintech, DeFi, blockchain, SaaS, and other tech sectors. It builds web and mobile apps, develops products and custom software, and handles API development and integration. For fintech clients, that means digital finance products that depend on solid app and integration work.
Key Facts
- Best for: Fintech companies building custom web, mobile, and API-driven products
- Core services: Custom software, web and mobile development, APIs, product development
- Specialization: Fintech and DeFi product engineering
- Industries: Fintech, DeFi, blockchain, SaaS
- Location: San Jose, California
Contact Information
- Website: creainc.us
- Address: 2880 Zanker Rd Suite 203, San Jose, CA 95134, USA
- LinkedIn: www.linkedin.com/company/creainc
Conclusion
A strong banking software development partner should match the institution’s technology needs, financial domain requirements, project scope, and location. The companies on this list cover areas such as digital banking, core banking, payments, lending, fintech applications, and financial system modernization. Comparing their relevant expertise, service scope, and California presence can help banks and financial businesses narrow the field to a development team that fits their specific project.