{"id":5318,"date":"2026-05-18T11:23:15","date_gmt":"2026-05-18T11:23:15","guid":{"rendered":"https:\/\/www.indonesia.worldfis.com\/?post_type=blog&#038;p=5318"},"modified":"2026-05-18T11:23:15","modified_gmt":"2026-05-18T11:23:15","slug":"from-legacy-systems-to-api-economies-the-future-of-open-core-banking","status":"publish","type":"blog","link":"https:\/\/www.indonesia.worldfis.com\/id\/blog\/from-legacy-systems-to-api-economies-the-future-of-open-core-banking\/","title":{"rendered":"From Legacy Systems to API Economies: The Future of Open Core Banking"},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"907\" src=\"https:\/\/www.indonesia.worldfis.com\/wp-content\/uploads\/2026\/05\/H1-From-Legacy-Systems-to-API-Economies.jpg\" alt=\"\" class=\"wp-image-5319\" srcset=\"https:\/\/www.indonesia.worldfis.com\/wp-content\/uploads\/2026\/05\/H1-From-Legacy-Systems-to-API-Economies.jpg 1000w, https:\/\/www.indonesia.worldfis.com\/wp-content\/uploads\/2026\/05\/H1-From-Legacy-Systems-to-API-Economies-300x272.jpg 300w, https:\/\/www.indonesia.worldfis.com\/wp-content\/uploads\/2026\/05\/H1-From-Legacy-Systems-to-API-Economies-768x697.jpg 768w, https:\/\/www.indonesia.worldfis.com\/wp-content\/uploads\/2026\/05\/H1-From-Legacy-Systems-to-API-Economies-13x12.jpg 13w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How Indonesia\u2019s Banks Are Transitioning to Composable and API-Driven Banking Models<\/h2>\n\n\n\n<p>Indonesia\u2019s banking sector is at a decisive point as institutions shift from monolithic core systems towards flexible, API-driven architectures. With rising transaction volumes, growing fintech participation, and strong regulatory direction, banks are rethinking how core systems are designed and deployed.<\/p>\n\n\n\n<p>For decision-makers evaluating long-term technology investments, the conversation is no longer about incremental upgrades \u2014 it is about building adaptable foundations that support collaboration, scalability, and new revenue models. This transition is becoming a central theme across every major banking technology conference, reflecting its strategic importance across Southeast Asia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Limitations of Legacy Core Banking Systems<\/h2>\n\n\n\n<p>Legacy core banking systems in Indonesia, often running on-premises, mainframe-based infrastructure, act as significant barriers to transformation, innovation, and customer experience, with 90\u201395% of banks in the ASEAN region still relying on these aging systems.<\/p>\n\n\n\n<p>In Indonesia, these constraints are further intensified by geographic complexity and a shortage of professionals skilled in both legacy and modern platforms.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Limitations Include<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High Operational &amp; Technical Debt<\/strong>\n<ul class=\"wp-block-list\">\n<li>A large portion of IT budgets (60\u201380%) is spent maintaining outdated infrastructure<\/li>\n\n\n\n<li>Monolithic systems struggle to scale alongside rising digital transaction volumes<\/li>\n\n\n\n<li>Talent shortages in legacy programming ecosystems heighten operational risk<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Rigid Architecture &amp; Lack of Agility<\/strong>\n<ul class=\"wp-block-list\">\n<li>New financial products roll out slowly compared to fintech competitors<\/li>\n\n\n\n<li>Batch processing delays real-time transaction capabilities<\/li>\n\n\n\n<li>Siloed data prevents a unified view of the customer<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Transformation Barriers<\/strong>\n<ul class=\"wp-block-list\">\n<li>Limited compatibility with API-based integrations<\/li>\n\n\n\n<li>Difficulty supporting Banking-as-a-Service models<\/li>\n\n\n\n<li>A disconnect between modern front-end applications and outdated back-end systems<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Risk and Compliance Pressures<\/strong>\n<ul class=\"wp-block-list\">\n<li>Growing exposure to cybersecurity threats<\/li>\n\n\n\n<li>Difficulty adapting to evolving regulatory requirements set by OJK<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Complex Modernization Efforts<\/strong>\n<ul class=\"wp-block-list\">\n<li>High-risk, multi-year system replacement projects<\/li>\n\n\n\n<li>Frequent delays caused by hidden system dependencies<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Understanding API Economies in Financial Services<\/h2>\n\n\n\n<p>Indonesia\u2019s financial ecosystem is increasingly shaped by API-led collaboration, driven by initiatives such as the Standard National Open API Payment (SNAP). These frameworks standardize how banks and fintechs interact, enabling faster service development and broader financial access.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Components Include<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Regulatory Framework (SNAP):<\/strong> Standardizes API integration across institutions<\/li>\n\n\n\n<li><strong>BI-FAST Integration:<\/strong> Enables real-time, low-cost transactions through API connectivity<\/li>\n\n\n\n<li><strong>Growth Segments:<\/strong> Digital banking, P2P lending, and e-wallet platforms<\/li>\n\n\n\n<li><strong>Financial Inclusion:<\/strong> Expands access to credit for MSMEs through improved data sharing<\/li>\n<\/ul>\n\n\n\n<p>This shift is redefining how institutions position themselves within the broader banking solutions ecosystem, where collaboration is becoming as important as competition.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Composable Core Banking: A Modular Approach to Innovation<\/h2>\n\n\n\n<p>Composable core banking introduces a modular structure where individual services operate independently and interact through APIs. Instead of replacing entire systems, banks can upgrade or deploy specific components as needed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Core Characteristics<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Modular Structure:<\/strong> Independent building blocks for different banking functions<\/li>\n\n\n\n<li><strong>API-First Design:<\/strong> Ensures interoperability across internal and external systems<\/li>\n\n\n\n<li><strong>Microservices Architecture:<\/strong> Enables flexibility and faster deployment cycles<\/li>\n\n\n\n<li><strong>Cloud-Native Foundations:<\/strong> Supports scalability and resilience<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits for Financial Institutions<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faster product launches and reduced development timelines<\/li>\n\n\n\n<li>Ability to integrate fintech capabilities without major system setbacks<\/li>\n\n\n\n<li>Lower operational risks through phased modernization<\/li>\n\n\n\n<li>More personalized financial services through targeted service combinations<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Cloud &amp; Infrastructure Modernization in Indonesia<\/h2>\n\n\n\n<p>Indonesia\u2019s banking sector is rapidly modernizing its infrastructure to support a growing digital economy, with over 180 million smartphone users and an expanding base of digital banks. This transformation is closely linked to the adoption of cloud banking in Indonesia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Trends Include<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Migration to hybrid and multi-cloud environments<\/li>\n\n\n\n<li>Growth of digital-only banks such as Bank Jago and SeaBank<\/li>\n\n\n\n<li>Regulatory support encouraging secure cloud adoption<\/li>\n\n\n\n<li>Increased use of containerization and serverless technologies<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Modernization Initiatives<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Deployment of cloud-native platforms for real-time services<\/li>\n\n\n\n<li>Strategic partnerships with global technology providers<\/li>\n\n\n\n<li>Adoption of AI and data analytics for decision-making and fraud detection<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Challenges<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uneven digital infrastructure across regions<\/li>\n\n\n\n<li>Shortage of skilled cloud and cybersecurity professionals<\/li>\n\n\n\n<li>Data sovereignty and compliance requirements<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Managing Risk, Security, and Governance in Open Architectures<\/h2>\n\n\n\n<p>As banks adopt API-driven and modular systems, managing risk becomes increasingly complex. Open architectures require strong governance frameworks to maintain control while enabling collaboration.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Priorities Include<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Strengthening cybersecurity across API ecosystems<\/li>\n\n\n\n<li>Implementing strict third-party risk management protocols<\/li>\n\n\n\n<li>Ensuring compliance with evolving regulatory standards<\/li>\n\n\n\n<li>Establishing clear data governance and access controls<\/li>\n\n\n\n<li>Defining clear leadership accountability for technology risk<\/li>\n<\/ul>\n\n\n\n<p>Openness and control are not opposing forces, getting that balance right is what sustains trust while enabling innovation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Business Impact: Speed, Efficiency, and New Revenue Models<\/h2>\n\n\n\n<p>The transition to composable and API-based banking models delivers measurable business outcomes beyond technology improvements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Impacts<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faster time-to-market for new products and services<\/li>\n\n\n\n<li>Reduced operational costs through automation and system flexibility<\/li>\n\n\n\n<li>New revenue streams through embedded finance and partnerships<\/li>\n\n\n\n<li>Improved customer experience through integrated service delivery<\/li>\n\n\n\n<li>Alignment between technology investments and business strategy<\/li>\n<\/ul>\n\n\n\n<p>For executives, the question is therefore not whether to pursue these outcomes, but how quickly and coherently they can be executed across the organization.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Industry Collaboration and Technology Dialogues<\/h2>\n\n\n\n<p>Modernization rarely happens in isolation. Collaboration across banks, fintechs, and technology providers is what turns strategy into successful execution \u2014 and industry forums are where that collaboration takes shape.<\/p>\n\n\n\n<p>Participation in a leading banking technology event enables stakeholders to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exchange real-world implementation experiences, not just frameworks<\/li>\n\n\n\n<li>Identify partnership opportunities within an increasingly interconnected ecosystem<\/li>\n\n\n\n<li>Evaluate emerging technologies against the realities of regulated environments<\/li>\n\n\n\n<li>Align modernization strategies with evolving regulatory expectations<\/li>\n\n\n\n<li>Equip leadership with the perspective needed to make informed, high-stakes decisions<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Gain Insights into Modern Core Banking Models at WFIS!<\/h2>\n\n\n\n<p>The infrastructure decisions Indonesian banks are making now \u2014 on core modernization, API adoption, cloud migration, and governance \u2014 will define how they compete for the next decade.<\/p>\n\n\n\n<p>For the leaders navigating these decisions, the World Financial Innovation Series returns to Jakarta as the region\u2019s most focused forum for exactly this work.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Agenda Highlights<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>&#8216;Transforming Core Banking into an Open, Composable Platform for the API Economy&#8217;<\/li>\n\n\n\n<li>&#8216;Cloud as Critical Infrastructure: Re-Architecting Financial Services for Scale, Speed &amp; Supervisory Confidence&#8217;<\/li>\n\n\n\n<li>&#8216;Steering Indonesia\u2019s Financial Sector 2030: Stability, Supervision &amp; Digital Acceleration Under New Regulatory Mandates&#8217;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Attendee Profile<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C-suite and senior executives from Indonesia\u2019s leading banks, insurance companies, and microfinance institutions<\/li>\n\n\n\n<li>Chief Information, Technology, and Digital Officers driving core modernization and cloud adoption<\/li>\n\n\n\n<li>Chief Risk, Compliance, and Legal Officers managing OJK regulatory requirements and governance frameworks<\/li>\n\n\n\n<li>Fintech leaders and innovators building within Indonesia&#8217;s regulated financial ecosystem<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Event Details<\/h3>\n\n\n\n<p><strong>Date:<\/strong> 27\u201328 October 2026<br><strong>Venue:<\/strong> Raffles Jakarta, Indonesia<\/p>\n\n\n\n<p>Don\u2019t miss out on one of Southeast Asia\u2019s most substantive gatherings for financial services leaders navigating the next phase of institutional transformation.<\/p>\n\n\n\n<p><strong>For more information, visit:<\/strong><br><a href=\"https:\/\/www.indonesia.worldfis.com\/id\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.indonesia.worldfis.com\/<\/a><\/p>\n\n\n\n<p><strong>Register Today!<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>How Indonesia\u2019s Banks Are Transitioning to Composable and API-Driven Banking Models Indonesia\u2019s banking sector is at a decisive point as institutions shift from monolithic core systems towards flexible, API-driven architectures. With rising transaction volumes, growing fintech participation, and strong regulatory direction, banks are rethinking how core systems are designed and deployed. For decision-makers evaluating long-term [&hellip;]<\/p>","protected":false},"featured_media":5320,"comment_status":"closed","ping_status":"closed","template":"","categories":[],"tags":[],"class_list":["post-5318","blog","type-blog","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/blog\/5318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/types\/blog"}],"replies":[{"embeddable":true,"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/comments?post=5318"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/media\/5320"}],"wp:attachment":[{"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/media?parent=5318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/categories?post=5318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.indonesia.worldfis.com\/id\/wp-json\/wp\/v2\/tags?post=5318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}