--- title: "Custom Software Development & Engineering" description: "Custom software development for web, mobile and cloud: enterprise platforms, APIs, legacy modernisation and DevOps with Next.js, React, Node.js and Flutter." url: https://onesight.global/services/software-development/ source: https://onesight.global/services/software-development/ generated_by: aeo.js --- # Custom Software Development & Engineering Custom software development for web, mobile and cloud: enterprise platforms, APIs, legacy modernisation and DevOps with Next.js, React, Node.js and Flutter. - [Home](/) - [Services](/services/) - Engineering Service 02 · Engineering ## Custom software development, engineered to scale Precision-built systems that scale. We architect, build and maintain the web platforms, mobile apps, APIs and cloud infrastructure that organisations can’t afford to see fail, and modernise legacy systems without stopping the business. [Plan your build](/contact/) [See what’s included](#capabilities) - Since 2014 - Reply within 1 business day - NDA on request - English · Italiano · Português In short ## What is Onesight’s software engineering service? Onesight Global is a custom software development company. We design, build and maintain web platforms, mobile apps, APIs and cloud infrastructure for organisations that can’t afford downtime or drift, and we modernise legacy systems step by step. We work in Next.js, React, Angular, Node.js, Symfony, Laravel, Flutter and React Native, as a turnkey project, a dedicated team or through staff augmentation. Focus Web, mobile, APIs, cloud and DevOps Since 2014 Engagement Turnkey project, dedicated team or staff augmentation Languages English, Italian, Portuguese Markets Italy, the EU and Brazil Response Within one business day Confidentiality NDA on request Sound familiar? ## Software that holds you back ### A platform that buckles under growth Slow pages, timeouts at peak and a database that is always the bottleneck, just when the business takes off. ### Legacy code nobody wants to touch Every release is a risk, the original developers are gone and the documentation never existed. ### Projects that drift Deadlines move, scope creeps and nobody can say what “done” looks like or what it will cost. ### Compliance as an afterthought Security reviews, GDPR requests and accessibility rules discovered after launch, when fixing them costs the most. What we do ## Software engineering services Load-bearing software and infrastructure, from the first blueprint to years of evolution in production. - Web · Platforms ### Custom Web Applications & Enterprise Platforms Portals, SaaS products, marketplaces and internal tools built for heavy traffic and long lives, with a clean architecture and test coverage that keep change cheap. SaaS and multi-tenant platforms - B2B portals and marketplaces - Internal tools and back offices - Accessibility (WCAG) and performance budgets - Mobile ### Mobile App Development iOS and Android apps from one codebase with Flutter and React Native, wired to your backend, with offline support, push notifications and store releases handled. Cross-platform apps (Flutter, React Native) - Offline-first and sync - Push notifications and deep links - App Store and Google Play releases - Backend · APIs ### Backend, APIs & Integrations Robust APIs and services in Node.js and PHP (Symfony, Laravel) that connect your ERP, CRM, payment providers and third-party services, and keep data consistent between them. REST and GraphQL APIs - Microservices and event-driven systems - ERP, CRM and payment integrations - Data migrations - Frameworks ### Framework-Based Consulting Deep expertise in Next.js, React, Angular, Node.js, Symfony, Laravel, Flutter and React Native: architecture reviews, performance tuning and upgrade paths for faster delivery and fewer surprises at launch. Architecture and code reviews - Performance and Core Web Vitals tuning - Major version upgrades - Coaching for in-house teams - Modernisation · Cloud ### Legacy Modernisation & Cloud Migration We move monoliths to modern stacks step by step, migrate to AWS, Google Cloud or Azure with infrastructure as code, and keep the business running during the switch. Code audits and tech-debt maps - Incremental rewrites (strangler pattern) - Cloud migration and cost optimisation - CI/CD, DevOps and observability - Blueprint · Governance ### Software Blueprinting & IT Governance Replicable delivery frameworks with phases, roles, resources and success metrics defined from day one, and IT governance that aligns every investment with business goals, as we did with [WBlow](/wblow/), our EU whistleblowing platform. Delivery blueprints and estimates - Architecture decision records - IT governance and compliance - Security and privacy by design [Plan your build](/contact/) [See WBlow, the compliance platform we built and run](/wblow/) How we work ## How we build software you can rely on Predictable delivery: a blueprint before code, working software every sprint, and releases you can roll back. ### Blueprint Discovery workshops, architecture and a delivery blueprint: phases, roles, risks, estimates and the metrics that define done. ### Design UX flows, prototypes and an API contract agreed before code, so front end and back end move in parallel. ### Build Short sprints, code review on every change, automated tests and a demo you can click at the end of each sprint. ### Release CI/CD pipelines, a staging environment that mirrors production, and releases you can roll back in minutes. ### Evolve Monitoring, security patches, dependency upgrades and a roadmap for what comes next. Use cases ## Built for the companies that run on it Where our software engineering makes the biggest difference. ### Startups and scale-ups From MVP to a platform that handles growth, without a rewrite halfway through. ### Enterprises Portals, integrations and modernisation of core systems, delivered alongside in-house IT. ### E-commerce and retail Fast storefronts, custom checkouts and integrations with ERP, stock and logistics. ### Finance and insurance Secure customer portals, back-office automation and audited data flows. ### Regulated industries Audit trails, access control and data protection built in from the first sprint. ### Software companies Extra senior capacity to ship the roadmap, with architecture that keeps it maintainable. ### What you get - Architecture and delivery blueprint - Production-grade codebase with automated tests - CI/CD pipelines and infrastructure as code - Technical and API documentation - Monitoring, alerting and runbooks - Maintenance and evolution plan Technology ## Technologies we build with ### Front end - Next.js - React - Angular - TypeScript ### Mobile - Flutter - React Native ### Back end - Node.js - PHP - Symfony - Laravel - PostgreSQL - MySQL - MongoDB - Redis ### Cloud and DevOps - AWS - Google Cloud - Azure - Docker - Kubernetes - Terraform - GitHub Actions Why Onesight ## One accountable partner, since 2014 ### One accountable partner Strategy, engineering, security, automation and design under one roof since 2014, so nothing falls between vendors and one team answers for the result. ### We run what we build [Adam](/adam/), our autonomous sales agent, and [WBlow](/wblow/), our EU whistleblowing platform, are our own products in production. Client work gets the same standard. ### Engineering discipline, everywhere Code review, automated tests, security and performance budgets are part of every engagement, not an upsell. What we hand over is documented and maintainable. ### European contracts, three languages EU clients contract with GoLittle (VAT IT13053300961) under Italian law. Our teams work in English, Italian and Portuguese, across Italy, the EU and Brazil. FAQ ## Engineering: questions, answered How much does custom software development cost?It depends on scope, integrations and the team you need. We start with a blueprint that fixes scope, phases and a cost estimate; you then choose a turnkey project, a dedicated team billed monthly, or individual engineers through staff augmentation. Which technologies and frameworks do you work with?Next.js, React and Angular on the front end, Node.js, Symfony and Laravel on the back end, Flutter and React Native for mobile, deployed on AWS, Google Cloud or Azure with Docker, Kubernetes and Terraform. Can you take over an existing codebase?Yes. We start with a code and architecture audit, document what we find, stabilise the riskiest parts first and then improve the system incrementally, without a big-bang rewrite. Do you build mobile apps as well as web platforms?Yes. We build iOS and Android apps with Flutter and React Native that share a backend and APIs with your web platform, and we handle the App Store and Google Play releases. How do you keep projects on time and on budget?With software blueprinting: phases, roles, resources and success metrics are defined before development starts, progress is demoed every sprint, and every scope change is estimated before it is accepted. Do you maintain software after launch?Yes. We offer ongoing maintenance and evolution: monitoring, security updates, dependency upgrades and new features, delivered by a team that already knows your system. Can you work with our in-house developers?Yes. We can lead the project, join your team through staff augmentation, or coach your developers on architecture and frameworks. Do you work with companies outside Italy?Yes. We work with organisations across Italy, the rest of Europe and Brazil, in English, Italian and Portuguese. More services ## Everything else you need, from the same team ### AI Development & Data Analytics Generative AI, AI agents, machine learning, data engineering and BI, from strategy to production. [AI Development & Data Analytics](/services/ai-development/) ### AI-Enhanced Cybersecurity Penetration testing, AI and LLM security, a 24/7 AI SOC, incident response, cloud security and Zero Trust. [AI-Enhanced Cybersecurity](/services/cybersecurity/) ### IT Outsourcing & Staff Augmentation Staff augmentation, dedicated and ad hoc development teams, with the Rotate & Accelerate methodology. [IT Outsourcing & Staff Augmentation](/services/it-outsourcing/) ### Business Process Automation & Risk Management Process mapping, workflow and AI automation, integrations, RPA and operational risk assessment. [Business Process Automation & Risk Management](/services/process-automation/) ### Innovation Consulting, Design Thinking & SEO Design thinking, product discovery, market exploration, SEO and AI search optimisation (GEO). [Innovation Consulting, Design Thinking & SEO](/services/innovation-consulting/) ### Animated Websites, Explainer Videos & 3D Graphics Animated and WebGL websites, explainer videos and 3D graphics, fast and accessible. [Animated Websites, Explainer Videos & 3D Graphics](/services/animated-websites-explainer-videos/) [All Onesight services on one page](/services/) ## Let’s engineer what you’ll rely on Tell us what you’re building or what needs fixing. We reply within one business day with a first view on scope and approach. [Plan your build](/contact/)Or write to [hello@onesight.global](mailto:hello@onesight.global) · call [+39 351 9073507](tel:+393519073507)