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Software

Custom Software Development Company

FISTA Solutions is a custom software development company that builds SaaS products, marketplaces, ERPs, CRMs, portals, data platforms, and integrations for US and global clients. Each of the 23 pages below covers one type of system: what it includes, the requirements that shape it, where AI fits, and how cost and timeline are scoped.

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150+
projects delivered
50+
companies served
99.9%
verified uptime
47%
efficiency gains
12+
countries reached

Choose the system type

Which kinds of software does FISTA build?

FISTA builds products and platforms (SaaS, marketplaces, ecommerce, customer portals, PWAs, telehealth, booking, fintech, IoT), business systems (ERP, CRM, LMS, HRMS, inventory and warehouse, fleet, POS, data platforms), and engineering programs (custom web apps, API integration, legacy modernization, MVPs, enterprise software). Open the type you need.

Products & platforms

  1. 01SaaS PlatformsSaaS platform development companyOpen
  2. 02Marketplacesmarketplace platform development companyOpen
  3. 03Ecommerce Platformsecommerce platform development companyOpen
  4. 04Customer Portalscustomer portal development companyOpen
  5. 05PWAsprogressive web app development companyOpen
  6. 06Telehealth Platformstelehealth platform development companyOpen
  7. 07Booking Systemsbooking system development companyOpen
  8. 08Fintech Platformsfintech platform development companyOpen
  9. 09IoT PlatformsIoT platform development companyOpen

Business systems

  1. 01ERPERP development companyOpen
  2. 02CRMCRM development companyOpen
  3. 03LMSLMS development companyOpen
  4. 04HRMSHRMS development companyOpen
  5. 05Inventory & WMSinventory management software developmentOpen
  6. 06Data Platformsdata platform development companyOpen
  7. 07Document Managementdocument management system developmentOpen
  8. 08Fleet Managementfleet management software developmentOpen
  9. 09POS SystemsPOS software development companyOpen

Engineering programs

  1. 01Custom Web Appscustom web application development companyOpen
  2. 02API IntegrationAPI integration servicesOpen
  3. 03Legacy Modernizationlegacy system modernizationOpen
  4. 04MVP DevelopmentMVP development companyOpen
  5. 05Enterprise Softwareenterprise software development companyOpen

Delivery

How does FISTA deliver custom software?

FISTA delivers custom software in four phases: a discovery sprint that turns goals into a specification with acceptance criteria, an architecture and data design with integration contracts, two-week builds with automated tests and weekly demos, and a verified release with infrastructure-as-code, runbooks, and monitoring.

  1. 1

    Discover and specify

    Workshops, process mapping, and system inventory produce a specification with acceptance criteria and a phased plan.

    Output

    Specification, estimate, roadmap

  2. 2

    Architect

    Data model, service boundaries, API contracts, security, and infrastructure decisions recorded with trade-offs.

    Output

    Architecture decision records

  3. 3

    Build and demo

    Two-week sprints with unit, integration, and contract tests; a demo on your environment every week.

    Output

    Working increments in your repo

  4. 4

    Verify and release

    Performance and security testing against the spec, infrastructure-as-code, runbooks, dashboards, and handover or managed operations.

    Output

    Verified release with SLOs

Why FISTA

Why choose FISTA Solutions for software development?

Because the specification is written before the code, the engineers are AI-native and reviewed, the contract is with a US entity, and the delivery rhythm is weekly demos on your environment. The two lists below are the same on every page in this section; the page-specific reasons are on each page.

How FISTA engineers

  • Spec-Driven Development: every deliverable starts as a written specification with acceptance criteria, so scope is testable before it is built.
  • AI-native delivery: engineers direct coding agents under review gates and evaluation harnesses, compressing build time without loosening verification.
  • Official Anthropic partner, with production experience across Claude, OpenAI, Google, and open-weight models, chosen per workload rather than by default.
  • One accountable delivery lead, weekly demos on your environment, and code in your repositories from week one.

What you get as a client

  • 150+ projects delivered for 50+ companies across 12+ countries since 2017, with 99.9% verified uptime on systems we operate.
  • A US entity (FISTA Solutions Inc., Wilmington, Delaware) for contracting, invoicing, and IP assignment, with an engineering center in Faisalabad, Pakistan for cost-efficient senior capacity.
  • US business-hours overlap for standups and reviews; written decision logs so nothing depends on a meeting you missed.
  • Flexible engagement: fixed-scope build, embedded forward deployed engineers, or a dedicated team that you can scale month to month.

Clear answers

What buyers ask before a custom build.

Straightforward guidance for evaluating scope, fit, and the next step.

01When does custom software beat an off-the-shelf product?

When the workflow is your competitive advantage, when the off-the-shelf tool forces expensive workarounds, or when licensing and per-seat costs outgrow a build. FISTA will say so when a SaaS product is the better answer and will integrate it instead.

02How does FISTA scope and price a custom build?

A discovery sprint produces a written specification with acceptance criteria, an architecture, and a phased estimate. Fixed-scope pricing is used for well-defined releases; a dedicated team or embedded engineers are used when the roadmap is evolving. No blind quotes.

03What technology stack does FISTA use?

Next.js, React, and TypeScript on the front end; Node or Python (FastAPI) services; Postgres, Redis, and event streaming; containers on AWS, Azure, or GCP; and Claude or other models for AI features. Stack choices are recorded as architecture decisions with their trade-offs.

04Who owns the code and the IP?

You do. Work is contracted through FISTA Solutions Inc. in Delaware with full IP assignment, and code is committed to your repositories from the first sprint, with documentation and infrastructure-as-code so any team can operate it.

05Can FISTA maintain and evolve the system after launch?

Yes. Post-launch options include a monthly retainer for maintenance and small features, a dedicated team for continued roadmap delivery, or managed operations with SLOs, on-call, and monitoring.

Continue exploring

Related capabilities

Web and mobile developmentThe pillar page for FISTA's product engineering practice.Mobile app developmentiOS, Android, Flutter, and React Native products by category.Staff augmentationAdd evaluated senior engineers to your own delivery team.

Scoped in writing before you commit

Build the system your business actually runs on.

Describe the workflow, the users, and the integrations. The scoping call returns a written specification, architecture, and phased estimate.

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