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Services / Web Application Development

Web Application Development

Build the tools your workflow actually needs. Custom portals, internal tools and connected applications, shaped around the people using them.

  • Workflow before features
  • Tested roles and integrations
  • Clear ownership and handover

01 / Define

Solve a real workflow

Understand users, handoffs and the limits of existing tools before building.

02 / Deliver

A focused first release

Prototype, build and test the key end-to-end task with clear acceptance criteria.

03 / Operate

Ready for everyday use

Plan deployment, ownership, documentation and support before launch.

Why application work matters

Better software starts with a clearer process.

When customer requests, approvals and operational records live across spreadsheets, inboxes and disconnected tools, people spend time chasing information instead of moving work forward. A custom application only helps if it solves the right process—not if it simply digitises the confusion.

Slashside helps define a focused product, prototype the key journeys and build a business application around real users, clear access rules and dependable integrations. We agree acceptance criteria, test the important failure paths and plan ownership and support before launch.

Not every business problem needs custom software.

We compare configuring an existing product, connecting current tools and building a custom application. The right decision accounts for operating costs, data portability, integration constraints and the value of your distinctive workflow—not just the initial build fee.

What the work includes

From business process to a working product.

Your proposal defines workflows, user roles, integrations, migration, acceptance criteria and deployment responsibilities. Hosting, licences, usage-based services and independent assurance are separate unless included.

01

Define the workflow

Start with the task, the users and the decisions—not a feature wishlist.

  • Stakeholder and user workflow review
  • Existing-tool and build-versus-buy assessment
  • Release boundaries and acceptance criteria

What you receive

Product brief, workflow map and prioritised backlog.

02

Design the experience

Make everyday tasks clear across desktop and mobile.

  • Clickable prototype for key user journeys
  • Forms, validation, empty and error states
  • Keyboard, focus and accessible interaction review

What you receive

Approved prototype and interface specifications.

03

Build the application

Connect usable screens to reliable business logic.

  • Record models and workflow state transitions
  • Authentication and server-side access checks
  • Search, requests, approvals and reporting as scoped

What you receive

Working application with documented access rules.

04

Connect the systems

Move information deliberately, with failure paths accounted for.

  • API feasibility and field mapping
  • Retries, deduplication and sync error visibility
  • Migration trials and data reconciliation

What you receive

Scoped integrations with an operating checklist.

05

Verify the release

Test business-critical journeys before rollout.

  • Role and record-access negative tests
  • Cross-device, validation and integration QA
  • Staging acceptance, cutover and rollback planning

What you receive

Acceptance evidence and an approved release plan.

06

Launch & hand over

Make the product operable beyond the delivery team.

  • Client-controlled accounts and access inventory
  • Deployment, monitoring and restore procedures
  • Training, documentation and support boundaries

What you receive

Source handover, runbook and next-release priorities.

Your main goal

What does your application need to make possible?

Start with the business task that matters most. The first release should solve that journey before expanding the feature list.

Streamline operations

Give repeated work a reliable path.

For teams managing approvals, requests and handoffs across spreadsheets and email.

  • Map one high-value workflow from request to completion
  • Define ownership, status changes and exception handling
  • Connect the source systems without duplicating authority
  • Pilot with the people doing the work every day

What we review

Task completion, manual touches, rework and elapsed cycle time—with a consistent baseline.

A clear delivery path

Discover. Define. Build. Launch.

Each stage has a reviewable output. Scope changes, external dependencies and acceptance decisions stay visible throughout delivery.

  1. 01

    Discover

    Review users, process, existing systems, data sensitivity and build-versus-buy trade-offs.

    Stage output

    Product brief and feasibility findings.

  2. 02

    Define

    Prototype the key journeys and agree release scope, access rules, acceptance criteria and milestones.

    Stage output

    Approved prototype and delivery plan.

  3. 03

    Build & verify

    Deliver in reviewable increments; test workflows, denied access, integrations and failure paths.

    Stage output

    Tested release candidate and acceptance record.

  4. 04

    Launch & evolve

    Plan cutover, train the team and hand over operating documentation with agreed support boundaries.

    Stage output

    Live release, runbook and next-step backlog.

Concept customer portal prototype beside workflow diagrams and a role-access matrix
Illustrative concept imagery—not client software, live operational data or team photography.

Built for real operations

The difficult details belong in the plan.

A polished screen is only part of an application. Access boundaries, integration failures and recovery procedures determine whether the product is ready for everyday use.

Access enforced beyond the screen
Agree who can read, change and export each type of record. Test denied requests and cross-account isolation, not just the visible menu.
Integrations that can fail safely
Define the system of record, duplicate handling, retries and exception ownership. A sync failure should be visible and recoverable.
A launch the team can operate
Agree cutover, backup and restore responsibilities, monitoring, documentation and escalation. Support hours and service commitments belong in the written scope.

Choose a sensible starting point

Choose the right first investment.

Start with discovery, commission a focused application or extend an existing product. The right engagement depends on how well the problem is understood and what your team can support.

Discovery & prototype

Validate the need before committing to a full build.

Workflow mapping, technical feasibility, a clickable prototype and a prioritised release plan.

Agree before starting

Users, research access, prototype depth and whether any production build is included.

Focused application build

Deliver a portal, internal tool or first product release with clear boundaries.

Agreed journeys, data model, roles, integrations, acceptance testing and launch handover.

Agree before starting

Release scope, client inputs, migration, third-party costs, ownership and acceptance criteria.

Continuous product development

Improve an existing application through a managed backlog.

Scoped features, technical improvements, release QA and recurring product reviews.

Agree before starting

Delivery capacity, release ownership, support hours and how new priorities affect the roadmap.

Discuss your application

Hosting, licences and third-party costs are separate unless included. Your agreement defines source-code ownership, third-party licences and exit arrangements. An enquiry is not an order or payment.

Reporting with context

Measure the workflow—not just the release.

Agree a baseline and the tasks that matter before delivery. Review usage, operational outcomes and technical health together, with test coverage and external dependencies stated.

Web application measures and interpretation limits
SignalWhat we reviewWhat it cannot prove
Workflow efficiencyTime to complete the agreed task, manual handoffs and rework compared with a defined baseline.A faster workflow does not automatically prove cost savings; workload and adoption matter.
User adoptionActivation and repeat completion of key tasks by eligible users.Logins alone are not meaningful use, satisfaction or product-market fit.
Application reliabilityErrors, failed jobs, response times and availability during the agreed monitoring window.Third-party dependencies and monitoring gaps affect visibility; no uptime guarantee is implied.
Data & access integrityMigration reconciliation, integration exceptions and pass/fail evidence for agreed access cases.Passing scoped tests is not proof of complete security or legal compliance.
Release qualityAcceptance criteria, unresolved defects, accessibility checks and recovery readiness.Automated checks do not replace user acceptance, manual review or independent assurance.

We do not guarantee productivity savings, product-market fit, uptime or freedom from security incidents. Security and accessibility reviews cover the agreed scope; independent audits, penetration testing and regulated compliance require explicit specialist arrangements.

Grounded in official guidance

Good application work has clear foundations.

Official application security, accessibility, API and secure development guidance. References are not certifications, endorsements of Slashside or a guarantee of compliance.

OWASP — ASVS

A framework for defining and checking application security requirements. Referenced controls must be scoped and tested.

Read official guidance

W3C — WCAG 2.2

Accessibility guidance for understandable forms, navigation and usable interactions.

Read official guidance

OpenAPI Specification

A shared specification for describing HTTP APIs and their expected behaviour.

Read official guidance

NIST — SSDF

Secure development guidance covering preparation, protection, production and vulnerability response.

Read official guidance

Before you decide

Your application questions, answered.

Clear answers on scope, costs, integrations, sensitive data, ownership and post-launch support.

Your application conversation

Turn a difficult workflow into a clear next step.

Share the task you want to improve, who uses it and which systems are involved. We’ll help define a sensible discovery or delivery starting point.

Discuss your application

No credentials or sensitive records needed to enquire.