Web platforms for financial services

Build digital products that connect cleanly to the systems behind them.

We design, build and modernise customer portals, transactional platforms and web applications for banking, fintech and insurance - engineered around real integrations, security requirements and existing technology environments.

Speednet teams working at their desks in an open-plan office.

Customer-facing products. Integration-first delivery.

  1. Web Apps
  2. Portals
  3. Platforms
  4. APIs
  5. Integrations
  6. CMS

50+ companies have trusted Speednet

  • Financial institutions integrated into one digital lending platform25+

  • Microservices powering a multi-institution fintech platform100+

  • Active users supported on a large-scale web platform4M+

  • Designed platforms delivered across regulated digital products50+

Key challenges

Where web delivery slows down - and how we keep it moving.

A new interface is rarely the hard part. The real delivery constraints sit behind it: legacy systems, fragmented architecture, integrations, security requirements and dependencies across teams.

  • Backend dependencies slow the customer-facing roadmap

    New journeys often depend on core systems, APIs, data services and third-party platforms that evolve at a very different pace from the frontend.

    Design the product around real dependencies from day one.

  • Legacy architecture makes every change more expensive

    Mature applications accumulate tightly coupled components, outdated frameworks and technical debt that make seemingly simple changes risky.

    Modernise incrementally without stopping feature delivery.

  • Complex journeys cross too many systems

    Onboarding, lending, payments, servicing and self-service journeys rarely live inside one application. Every additional system creates another failure point and another delivery dependency.

    Treat the customer journey and the systems behind it as one product.

  • Security and compliance shape the architecture

    Authentication, access control, sensitive data, accessibility, audit requirements and internal security review affect how the product must be built, not just how it is tested before release.

    Build control into the platform, not around it.

  • Scale changes what "good architecture" means

    A solution that works for the first product release may struggle as traffic, functionality, teams and integration points grow.

    Build for the scale your roadmap is heading towards.

Illustration of a dollar sign inside concentric circles.

Web capabilities

How we help financial organisations move digital products forward.

  • New digital products & platforms

    Take a new web product from concept to production. Product discovery, UX, architecture, frontend and backend development, integrations, testing, security and production rollout.

  • Customer portals & transactional journeys

    Turn complex financial processes into usable digital experiences. Customer self-service, lending, onboarding, account servicing, payments and other transactional journeys connected to the systems that execute them.

  • Web platform modernisation

    Modernise mature applications without freezing the roadmap. Frontend renewal, architecture evolution, legacy decomposition, framework migration and incremental replacement of ageing components.

  • Web delivery teams

    Add specialist capacity or complete delivery ownership. Individual frontend and backend specialists or complete squads covering product, UX, engineering, integration and QA.

  • AI-enabled web delivery

    Use AI to accelerate delivery without losing engineering control. Apply governed AI across development, testing, documentation and modernisation workflows while keeping code, context and approvals inside controlled delivery processes.

Beyond the frontend

A web product is only as strong as the platform behind it.

The frontend is what the customer sees. Delivery speed, reliability and scalability depend on how the experience layer connects to business logic, data, integrations and infrastructure underneath.

  • Experience layer

    Fast, accessible customer-facing experiences. Web applications, portals and transactional journeys designed around usability, performance and accessibility.

    Typical technologies: React · Angular · TypeScript · Next.js

  • Application & domain layer

    Business logic that can evolve without rebuilding the experience. Services and applications responsible for workflows, rules, orchestration and product-specific logic.

    Typical technologies: Java · Kotlin · .NET · Node.js · Python

  • Content & experience platforms

    Manage complex content without turning every change into a development project. Traditional and headless CMS architectures for content-heavy customer journeys, corporate platforms and multi-market digital estates.

    Typical platforms: Drupal · WordPress · Headless CMS

  • Platform & delivery

    Make production part of the architecture. Cloud, containers, CI/CD, observability, security and deployment patterns designed around how the product will actually operate.

    Typical environments: Azure · AWS · Kubernetes · Docker · CI/CD

A smiling Speednet team member sitting by a desk.

What customers interact with

  • Web apps
  • Portals
  • Dashboards
  • Transactional journeys
  • Content

What makes it work

  • Business logic
  • APIs
  • Data
  • Identity
  • Infrastructure
  • Observability

Let's talk web

Modernising an existing platform or building the next one?

Whether you need a new customer-facing product, a major platform modernisation or help untangling the architecture behind an existing web estate, we can help define the right path forward.

Our process

From product idea to production, without losing control of the systems underneath.

We adapt to where you are today: building a new platform, extending a live product or modernising an existing web estate.

  • 1

    Understand the product and environment

    We map business goals, customer journeys, current architecture, backend dependencies, integrations, security requirements and the existing delivery process.

  • 2

    Define the right architecture

    We decide what should be built, reused, integrated, modernised or separated - and define an architecture that fits both the immediate product and the longer-term roadmap.

  • 3

    Build across the product stack

    Our product, frontend, backend, integration and QA specialists work as one delivery stream within your tools, governance and engineering environment.

  • 4

    Release and stabilise

    We support testing, security review, performance validation, production rollout, observability and the first iterations after launch.

  • 5

    Scale, modernise or transfer

    We can continue evolving the product, scale the delivery team, modernise further areas of the platform or transfer ownership and knowledge to your internal organisation.

Case studies

From complex web roadmap to working platform.

See how we've helped organisations build, modernise and scale customer-facing products in complex technology environments.

We were impressed by Speednet's ability to comprehend the exact skill set required for our project and quickly assembled a team of specialists who were ready to hit the ground running.

Lauri LehtonenCTO at Lyyti Oy

Web as a product platform

Web platforms connect customer experience with the systems that run the business.

For financial organisations, web platforms increasingly sit between customers, internal operations and a growing ecosystem of core systems, data sources and external services. Their architecture directly affects how quickly the business can change.

  • More business moves into self-service

    Customer portals increasingly handle journeys that previously required branches, contact centres or manual operations.

  • Every new journey reaches deeper into the stack

    The value customers see in the frontend depends on data, business rules and services sitting behind it.

  • Platform architecture shapes delivery speed

    Tightly coupled applications make every change more expensive. Clear boundaries make individual parts easier to evolve.

  • Modernisation becomes continuous

    Large digital estates rarely get the luxury of a clean rewrite. The winning approach is usually to improve the architecture while the product continues to operate.

Speednet team members smiling at a meeting table.

Featured insight

Research and practical thinking for digital product leaders

Report cover: Value-Added ServicesReport cover: Banking trends 2025-2030Report cover: Neobanks vs. Legacy Banks
  • Discover the secrets to maximising the success of your banking software with our free ebook on value-added services.

    Download for free
  • Banking trends 2025-2030: 9 megatrends, 19 real-world implementations and 4 moonshot trends for financial institutions.

    Download for free
  • Neobanks vs. Legacy Banks: how traditional banks can compete with neobanks on mobile apps and UX.

    Download for free

Web insights

Ideas for building, modernising and scaling digital platforms.

Tech stack

Technologies we work with.

  • Frontend

    React · Angular · TypeScript · Next.js

  • Backend

    Java · Kotlin · .NET · Node.js · Python

  • Platform

    Azure · AWS · Kubernetes · Docker · CI/CD

FAQ

Frequently asked questions about web platform development for financial services

  • What types of web products do you build?

    We build customer portals, transactional applications, digital banking platforms, lending and servicing solutions, self-service products, back-office applications and other complex web platforms for financial organisations.

  • Can you build both the frontend and backend?

    Yes. We can take responsibility for the complete product stack, including UX, frontend, backend services, APIs, integrations, testing and production delivery, or work on a selected layer alongside your existing teams.

  • Can you modernise an existing web platform without rebuilding it from scratch?

    Yes. In many mature environments, an incremental approach is safer and more practical than a big-bang rewrite. We can modernise selected components, introduce new architectural boundaries and replace legacy technology while the existing platform continues to operate.

  • Can you work with our existing core systems and legacy architecture?

    Yes. Most financial projects we work on involve existing systems rather than greenfield infrastructure. We design the customer-facing platform around real APIs, data flows, security constraints and legacy dependencies.

  • Do you work with CMS and content-heavy platforms?

    Yes. We work with both traditional and headless CMS architectures and can integrate content platforms with customer-facing applications, APIs and existing enterprise systems.

  • How do you approach security in web applications for financial services?

    Security requirements are considered from the architecture stage onward, including authentication, authorisation, data protection, secure development practices, auditability and the organisation's own security and release processes.

  • Can you help us decide whether to modernise or replace an existing platform?

    Yes. We can assess the existing architecture, technical debt, delivery bottlenecks and business roadmap, then identify which areas should be retained, refactored, replaced or separated before committing to a transformation programme.

  • Can you work with our internal engineering team?

    Yes. We can add individual specialists, provide a complete delivery squad or take ownership of a defined product or modernisation stream while working inside your engineering standards, tools and governance.

  • Can you take a web product from discovery to production?

    Yes. We can cover product discovery, UX, architecture, frontend and backend engineering, integrations, QA, security review, production rollout and ongoing development.

  • Do you only build web products for banks?

    No. Our deepest experience is in banking and financial technology, but we also build complex platforms in insurance and other industries where integration, scale, security and reliability matter.

  • How do you use AI in web development?

    We use AI to support activities such as implementation, refactoring, testing, documentation and legacy modernisation. In regulated environments, we can introduce AI through governed workflows that control access to code and project context, retain human approval and provide visibility over how AI is used.

Let's talk web

What's next on your digital product roadmap?

Tell us what you're building, modernising or trying to simplify. We'll connect you with a Speednet expert who understands complex web platforms and can help define the right way forward.

Michał Grela, a smiling man in a dark jacket

Michał GrelaHead of Growth

michal.grela@speednet.pl+48 600 023 843