Fintech & Banking Software Development Services
Banking software development means building custom software for banks, challengers, and fintechs: core banking integrations, online and mobile financial applications, payment processing platforms, risk and compliance software. Accedia has delivered this across UK and US markets for over 13 years, from initial build to long-term engineering partnership.
Trusted by Industry Leaders
Built for Banking & Fintech Software Decision-Makers
Banking software development services are built for technology leaders who own the vendor decision in regulated financial environments. The people who typically reach out to us are:
CIOs and CDOs at retail and commercial bank
Heads of IT and Technology at SME and community banks
CTOs at FinTech startups and digital finance platforms
VPs of Engineering at digital lending and payment companies
Financial Software Delivered Across Segments
Retail Banks
Core banking modernization, digital channel development, API integrations, and customer-facing mobile and web banking applications for banks managing high transaction volumes and strict regulatory requirements.
Commercial & Investment Banks
Banking software solutions for commercial lending, payment processing, investment operations built for multi-entity environments with complex reporting and compliance requirements.
Digital Lending & Mortgage
Loan origination platforms, automated credit decisioning, identity verification, and broker integration for lenders processing high volumes of applications.
Challenger & Digital Banks
Cloud-native banking platforms, open banking integrations, and data infrastructure for digital-first institutions operating at scale.
Wealth & Asset Management
Portfolio tracking, advisor portals, retirement fund systems, and AI-driven client reporting platforms for firms managing complex investment portfolios.
Fintech ScaleUps
Financial products built on scalable, flexible architecture, with compliance built in from the start and third-party integrations that keep pace with product growth.
Custom Retail Banking Software Solutions
Accedia partners with retail banks to modernize legacy systems, improve digital customer experiences, and support secure, compliant banking operations across channels. From core banking integrations to customer-facing mobile apps, we work within existing banking environments and processes to support gradual, reliable improvements without disrupting ongoing operations.
See Our Retail Banking ExpertiseAmong Our Certifications & Recognitions
Financial Software, by The Numbers
13+
Years
Delivering banking and fintech software across UK and US markets
91%
Retention
Across retail, commercial and fintech engagements
2
Weeks
To assemble a financial software team and start delivery
ISO 27001
Certified
Required for every regulated financial engagement
How To Choose a Banking Software Development Company
Cross-Vertical Experience
Look for a track record that spans multiple finance verticals. A vendor who has delivered across retail, commercial, investment banking, and FinTech understands that each segment carries different regulatory, integration, and delivery requirements.
Regulatory and Compliance Depth
Compliance credentials carry more weight in finance than in almost any other sector. ISO 27001 is the entry point. Beyond that, look for hands-on delivery within DORA, PSD2/PSD3, GDPR, AML/KYC, and FCA-regulated environments.
Smooth Legacy Integration
Connecting new software to an existing core banking system is rarely straightforward. Ask any vendor how they assess what is already in place before they start building, and how they plan to keep live operations running throughout.
AI and Data Engineering Capabilities
AI capabilities in banking require different technical depth and domain knowledge depending on the use case. The relevant question is which of these a vendor has delivered in a regulated banking environment, and at what scale.
Long-Term Continuity
In banking, changing software development partners often means lost domain knowledge, longer onboarding, and added operational risk. Continuous partnerships create stability and help teams move faster over time.
Commercial Transparency
Hidden costs in banking software typically come from scope creep, talent churn, and unclear ownership. Look for transparent pricing structures, a named Engineering Manager, and clear accountability throughout the engagement.
Engineering Manager
Bozhidar Goranchev
Bozhidar Goranchev is an Engineering Manager at Accedia, leading delivery for banking and fintech software engagements. He scales cross-functional teams across engineering, QA, and DevOps to keep complex financial projects on track.
Fintech & Banking Software Development Services We Build
Custom Banking Software Development
Digital banking platforms across web and mobile, built to your operational and regulatory requirements, covering retail portals, customer apps, and internal workflows.
AI & Agentic Banking Solutions
AI solutions and agentic systems that augment decision-making, accelerate credit scoring, and streamline compliance workflows across banking operations.
Data Platforms & Analytics
Real-time cloud, on-premise or hybrid solutions that consolidate fragmented financial data into actionable insights for operations, risk, and customer intelligence.
Core Banking Modernization & Legacy Integration
Modernization of legacy banking systems through AI-first architectures, cloud migration, and modular microservices, while keeping live operations running in parallel.
Fraud Detection & AML Automation
AI-powered fraud monitoring, sanctions screening, transaction analysis, and compliance automation solutions designed for faster and more accurate risk management.
Embedded Finance & Open Banking
Secure API ecosystems, embedded payment experiences, and digital banking integrations that help institutions reach new channels, partner with fintechs, and expand beyond traditional banking.
Cybersecurity Engineering
Security engineering, zero-trust implementation, cloud security, penetration testing, and regulatory compliance services for modern financial infrastructures.
Banking & Financial Software Development for the US and UK Markets
Accedia offers specialized financial software development solutions designed to meet the unique regulatory and market-specific needs of businesses in the UK and the USA. Learn more about our targeted expertise and successful client collaborations:
Castle Trust: Retail Finance Platform Development
Accedia has developed and maintained OmniPort, Castle Trust Bank's retail finance origination platform, since 2015, enabling automated credit decisioning, advanced fraud prevention, and direct integration across a network of 2,000+ retailers. The platform supports over 200,000 lending decisions annually, with most approved in minutes.
Alexforbes: Two Pot Retirement System
Accedia helped Alexforbes implement South Africa's Two Pot Retirement System, aligning core platforms, ensuring regulatory compliance, and giving members real-time visibility of their retirement savings before the rollout deadline.
Andaria: Unified Azure Data Platform
Accedia built a centralised Azure-based data platform for Andaria, replacing fragmented ERP and spreadsheet reporting across their fintech operations. A single source of truth now automates financial reporting and partner billing, supporting growth without added operational overhead.
Banking & Fintech Software Development in Action
Castle Trust: Retail Finance Platform Development
Accedia has developed and maintained OmniPort, Castle Trust Bank's retail finance origination platform, since 2015, enabling automated credit decisioning, advanced fraud prevention, and direct integration across a network of 2,000+ retailers. The platform supports over 200,000 lending decisions annually, with most approved in minutes.
Alexforbes: Two Pot Retirement System
Accedia helped Alexforbes implement South Africa's Two Pot Retirement System, aligning core platforms, ensuring regulatory compliance, and giving members real-time visibility of their retirement savings before the rollout deadline.
Andaria: Unified Azure Data Platform
Accedia built a centralised Azure-based data platform for Andaria, replacing fragmented ERP and spreadsheet reporting across their fintech operations. A single source of truth now automates financial reporting and partner billing, supporting growth without added operational overhead.
What Оur Clients Say
Since deployment, we've seen an increase in efficiency. What’s more, the turnaround time for producing financial statements for the board of trustees and the regulator has been optimized...Accedia is always clear, precise, and reliable. They consistently deliver what they say they will. I’ll reiterate that their efficiency is excellent.
The Accedia team feels like a part of our own, resulting in strong team dynamics which are critical to a successful partnership. We work very closely, they are able to change direction quickly and directly contribute to the evolving design and approach of our platform. They have added a great mix of fintech know-how, tech expertise and Scrum skills to the table, additionally helping to define processes.
I would strongly recommend Accedia as reliable partner for business process management consulting and software development services because of their expertise and professional attitude.
Accedia team is instrumental in delivering multiple projects across Omni business. Where the changes occur when a project is in progress, the team is accommodating and always looks for a solution to help deliver the best outcome for customers.
Discuss Your Banking or Fintech Software Project
Starting a banking or fintech software project? Whether it is a legacy core integration, an AI-driven fraud system, or a new digital lending platform, we will give you an honest assessment before you commit.
- Meeting with a fintech consultant
- Review of your current system and regulatory context
- Recommended starting point and engagement model
FAQs
What are banking software development services?
Banking software development services cover the design, build, and integration of custom software for banks, challengers, and fintechs. This includes core banking modernization, AI and machine learning for regulated financial environment, open banking and payments platforms, financial data engineering, cloud migration, and compliance and security engineering.
What certifications should a banking software company have to work with regulated institutions?
The frameworks that matter most for UK and US banking are ISO 27001 for information security, GDPR compliance built into architecture, and demonstrated delivery against DORA, PSD2/PSD3, FCA, and AML standards. Accedia is ISO 27001 certified and has delivered against each of these frameworks for banking clients in the UK and US.
How to choose a software development partner for a banking or fintech project?
The most important criteria are delivery certainty, regulatory depth, legacy integration experience, and commercial transparency. Ask for named references at institutions of similar size and complexity, verify ISO 27001 certification, and look for multi-year engagements. Accedia holds a 91% client retention rate and makes case studies available as part of the evaluation process.
How can banks and fintechs identify security vulnerabilities before they affect operations or compliance?
Banks and fintechs can identify security vulnerabilities through regular penetration testing and security assessments across applications, infrastructure, and customer-facing platforms. Simulating real-world attack scenarios helps uncover weaknesses in authentication flows, APIs, third-party integrations, and legacy systems before they can lead to service disruption, data exposure, or regulatory findings.
Learn About Penetration Testing