Web application development services — Netguru

Web application development services for product teams that ship

Custom web apps built on Rails, React, Node.js, and Python — from discovery to production, with an Engineering Manager accountable for every decision.

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Proven at scale — across industries

Unlike other agencies, Netguru provides the full spectrum of talent you need to achieve stable, long-term success.

18+

Years delivering production web apps

2,500+

Projects delivered for 900+ clients worldwide

4.9/5

Average client rating on Clutch

400+

Engineers and specialists available

Trusted by product teams worldwide

Whether you want to consult an idea, add missing capabilities, quickly expand your team, or hand over a project – we’ve got you covered.

What our web application development services cover

We handle every stage of the product lifecycle, so you work with one accountable partner from first sketch to live application.

UX/UI design

We research your users, map their journeys, and produce tested interfaces before a single line of code is written. Good design reduces rework downstream.

Custom development

Our engineers build frontend and backend layers to your exact requirements, choosing the right technology for the job rather than defaulting to a single stack.

Quality assurance

Manual and automated testing runs in parallel with development, catching issues early and giving you a clear quality gate before every release.

Third-party integrations

We connect your application to payment gateways, CRMs, ERPs, data providers, and internal APIs — so your new product fits into your existing operations from day one.

Cloud infrastructure and migration

We architect, deploy, and migrate applications on AWS, Google Cloud, and Azure, with security and cost efficiency built into the design rather than added later.

Ongoing support and development

After launch, we provide monitoring, incident response, and continuous feature development — keeping your application stable as your user base grows.

Types of web apps we build

Every architecture decision is locked in during discovery — before a line of production code is written.

Single page applications (SPA)

React 18 with Next.js 14 for SEO-capable SPAs. API-first contracts, idempotent endpoints, blue-green deploys from sprint zero.

Progressive web applications (PWA)

Offline-first service workers and Web Push for mobile reach without native app budget. Proven in logistics and retail.

SaaS products

Multi-tenant Rails 7 or Node.js backends with row-level data isolation, usage billing hooks, and feature-flag CI/CD pipelines.

Internal tools & ops platforms

Node.js or Python backends with React frontends. Scoped in a fixed discovery phase, then moved to a T&M retainer for ongoing engineering.

API-first products

Contract-defined, versioned, and OpenAPI-documented before any consumer is built. Designed for scale — not patched for it later.

Enterprise platforms

Cloud-native microservices on AWS ECS/EKS, federated APIs, multi-region deployment, and SLA-backed infrastructure from day one.

Web application development services: what they are and when you need them

A web application is software that runs in a browser and does something meaningful for the people using it — processing data, managing workflows, connecting users, or delivering a service. Unlike a marketing website, a web app changes state: it responds to inputs, stores information, and produces different outputs for different users.

Web application development services cover the full process of creating that software: defining requirements, designing the experience, writing the code, testing it, deploying it, and keeping it running. A good development partner handles all of those stages, not just the part that involves writing code.

Build vs. buy: a practical decision framework

Off-the-shelf SaaS products are the right choice when your need is generic, your processes are standard, and the vendor's roadmap aligns with where you are heading. They are faster to start and cheaper in the short term.

Custom development makes sense when your workflow is genuinely different from the market norm, when an existing product forces you to change how you work rather than the other way around, or when the application itself is the product you are selling. It also makes sense when data ownership, security requirements, or integration depth rule out third-party tools.

  • Choose off-the-shelf if: the problem is solved well by existing products, your team will adopt it without heavy customisation, and you can live with the vendor's constraints.
  • Choose custom if: the application is a competitive differentiator, your compliance requirements are specific, you need deep integration with proprietary systems, or the total cost of adapting to a SaaS product exceeds the cost of building your own.

Most organisations that come to us have already tried an off-the-shelf product and hit its ceiling. We help them move to something that fits — without rebuilding what does not need rebuilding.

Building Moonfare's private equity platform on React, Node.js & AWS

Full Stack Development · Fintech.

Technologies: React, Node.js, AWS (auto-scaling infrastructure).

Client expectations: Build a secure, regulation-compliant platform enabling accredited investors to access private equity — with KYC/AML gates, strict data residency, and a React front end that could onboard at scale.

Result of the partnership: Platform launched and covered by business daily Handelsblatt. Dedicated Engineering Manager + Product Designer pairing from discovery through go-live held budget drift to under 8% across the full engagement.

Moonfare — private equity platform built with Netguru

Get a scoped delivery plan in five days

Tell us what you're building. Within five days our Engineering Manager and a senior architect return an API architecture recommendation, stack selection, T&M estimate by phase, and a risk register covering the three failure modes we see most often.

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How we deliver: from discovery to post-launch

API-first architecture is the structural decision we lock in during discovery — before a single line of application code is written.

  1. Discovery & architecture design

    Engineering Manager, Product Designer, and solutions architect map domain boundaries, integration points, and non-functional requirements. We produce an Architecture Decision Record, not just a backlog.

  2. Sprint zero — environment setup

    CI/CD pipelines, blue-green deployment, observability stack (Datadog or OpenTelemetry), and OWASP Top 10 controls in place before feature development starts.

  3. Iterative build

    Two-week sprints with working, deployed software at each boundary. Frontend (React 18, Next.js) and backend (Rails 7, Node.js, Python) teams integrate against the agreed API contract.

  4. QA & security review

    Automated test suites target ≥80% coverage on critical paths. A dedicated security review maps findings against OWASP Top 10 before any production release.

  5. Launch & post-launch retainer

    We support go-live with on-call engineering, then transition to a product engineering retainer — maintaining, instrumenting, and iterating on live web apps rather than handing off and disappearing.

How much does web application development cost?

Costs vary by architecture depth, integration surface, and whether you need a post-launch retainer. Three complexity tiers cover the majority of custom web app builds:

TierWhat it coversTypical range
MVP / proof of conceptSPA or PWA, limited API surface, basic auth (OAuth/JWT), no legacy integrations$30k–$80k
Business-grade web appAPI-first architecture, third-party integrations (payments, CRMs, data pipelines), RBAC, CI/CD, observability$80k–$250k
Complex / enterpriseCloud-native microservices, federated APIs, multi-region deployment, blue-green releases, SLA-backed infrastructure$250k–$600k+

Ongoing maintenance typically runs 15–25% of initial build cost annually. Time and Materials engagements give you accurate cost visibility — you pay for actual engineering hours tracked against sprint goals, not a fixed estimate padded for unknown risk.

What our clients say

In our clients' words

Cooperation with Netguru allowed us to efficiently deliver our vision — the team brought valuable competencies in system architecture, backend development and cloud solutions that supported our business goals.

Paweł Grabowski

Head of Digital B2B at Żabka Future

It doesn't feel like an external team, it feels like we're just working together.

Dally Singh

Chief Product Officer, Total Processing

One of the fastest and most successful API development processes that we've ever had.

Piotr Mlodecki

Global VP, SOL-MILLENNIUM Medical Group

Frequently asked questions

Everything you need to know before starting a web application project with Netguru.

How much does custom web application development cost?

Custom web application development typically ranges from $30k–$80k for an MVP to $250k–$600k+ for a full-scale enterprise platform, depending on integrations, team size, and complexity. We share transparent pricing ranges during discovery so you can budget before committing to a full engagement.

How long does it take to build a web application?

Most web applications reach an initial production release in 3–6 months, assuming a clear scope and a dedicated team. Apps with complex data pipelines or regulatory requirements (HIPAA, PCI DSS) run longer. A discovery workshop in week one cuts the ambiguity that would otherwise add months downstream.

What engagement model fits a mid-stage product team?

Time and Materials fits best for mid-stage product teams — you control scope sprint-by-sprint as priorities shift, and billing tracks actual delivery rather than a fixed contract written before edge cases surfaced. Fixed-price works only when requirements are fully locked, which is rare in a growing product.

Who owns the IP and source code?

You own 100% of the IP and source code from day one — no licensing back, no lock-in clauses. Every contract assigns work-for-hire rights to your company, covering all frontend, backend, and infrastructure configuration, regardless of the stack used.

Do you offer post-launch engineering support?

Yes. We offer a post-launch product engineering retainer covering maintenance, performance tuning, feature development, and incident response. The same engineers who built the application stay on — context transfer to a new team is the single most common source of regression bugs after handoff.

How do you handle security, SOC 2, and GDPR compliance?

OWASP Top 10 compliance is our baseline on every web app we ship — input validation, dependency scanning, secrets management, and secure CI/CD are non-negotiable. For SOC 2 and GDPR, we work with your compliance lead to map data flows and build the required technical controls into the application architecture from discovery, not retrofitted post-launch.

Start building with a team that's shipped 2,500+ projects

No boilerplate decks. Tell us what you're building and within five days our Engineering Manager returns a scoped plan — architecture, stack, estimate, and risk register — based on a structured discovery workshop, not a sales pitch.

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