Custom Software Development Services
Performance, usability, and seamless integration are at the core of our approach.
On this page:Custom Software Development
Challenging projects, tailored solutions
As specialists in software development, we design solutions tailored to your business and technological requirements.
Whether you are at the ideation stage or already have a detailed specification, we support you at every step — from initial consulting to deployment, including hosting and ongoing evolution of your solution.
Complete expertise, from application development to advanced solutions for industry and research
Our areas of expertise
Our expertise covers a broad spectrum of needs, from traditional application development to industrial and scientific solutions.
Information systems
Design and integration of solutions for data management and business process optimization.
Web & Mobile
Development of web and mobile applications (native iOS/Android and cross‑platform), customer portals, business tools, and e‑commerce solutions.
Scientific computing
Design and development of solutions tailored to your specific needs, regardless of your industry.
HMI & Industrial Vision
Design of ergonomic HMIs and industrial vision solutions, including augmented and virtual reality.
Middleware & Protocoles
Development of APIs, distributed systems, industrial protocols, and IoT gateways to ensure interoperability.
UX/UI Design
Integration of best practices in Design Thinking, Design Systems, and Design Sprints to ensure usability, consistency, and visual appeal.
The six reasons to entrust us with your project
Why entrust your project to ADVANS Group?
As software development specialists, we support the development of your products by leveraging the most widely used architectures on the market (microservices, cloud‑native, API‑first) and state‑of‑the‑art front‑end and back‑end technologies (React, Angular, Vue.js, Node.js, Java, Python, .NET, etc.).
Have a project to bring to life? Whether you are looking for a partner to deliver your software development or to strengthen your teams, we have the right solution. Let’s discuss it today.
Technical expertise
Our engineers specialize in complex, multi‑technology environments.
Quality
Our culture of quality and confidentiality is reflected in a management system compliant with ISO 9001, ISO 14001, and ISO 27001 standards (more details on “Certifications” page), complemented by our CI/CD practices and automated testing processes.
Agile and collaborative approach
We can deliver fully customized solutions, either based on detailed specifications or co‑created with you using an Agile approach (rapid iterations, continuous adaptation).
Engagement models
We offer flexible engagement models tailored to your needs: consulting and expertise, competence centers, service centers, and fixed‑price projects.
Innovation and R&D
Our innovation and technology watch activities enable us to integrate the latest technologies (Cloud, AI, IoT, Digital Twins) to anticipate your future needs.
Technical and operational proximity
From our centers of expertise in Europe, or directly on your premises, we deliver your projects with responsiveness, commitment, and strong technical control.
Engagement models tailored to your technical and business challenges
Expertise, flexibility, and innovation
We offer a variety of engagement models to meet our customers’ needs.
Depending on the project scope and execution framework, custom software development services may be eligible for the French Research Tax Credit (CIR) or Innovation Tax Credit (CII). These schemes can provide tax incentives for R&D and technological innovation activities.
For any request, feel free to contact us.
Consulting
Our technical experts and consultants are involved in high value‑added assignments. Resources are managed by our business managers, while you remain responsible for delivery and project management.
Competence Center
We set up a dedicated team of engineers. Resources are managed by our business managers, while you remain responsible for delivery and project management.
Service Center
As part of a service center, in addition to setting up and managing a team of specialized engineers, we take responsibility for delivery as well as meeting cost, quality, and schedule objectives. We commit to results on activities defined in a catalog of units of work.
Fixed‑Price Project
Based on a set of specifications, we deliver the project in compliance with our cost, quality, and schedule commitments. Our design offices handle all phases of execution across a wide range of projects, from single‑discipline developments to cross‑functional initiatives involving numerous technological interactions.
Interfaces designed around your business use cases
Custom HMIs
Designing an effective HMI means understanding business constraints, technical environments, and end‑user expectations. At ADVANS Group company, we develop robust, ergonomic interfaces that are seamlessly integrated into your systems.
Business‑specific interfaces
For industrial software, internal tools, and customer portals, we design HMIs tailored to your processes, users, and technical environments.
Multi‑device design
Desktop, tablet, mobile: our interfaces are designed for smooth use across all devices, with particular attention to performance and accessibility.
Technical integration
ERP, CRM, databases, embedded systems: our HMIs integrate into your existing architectures, using an API‑first approach with strong interoperability.
UX / UI collaboration
Our software engineers work closely with UX/UI designers to ensure consistency between user experience and technical implementation.
In this interview, Emeline, UX/UI Designer, presents our user‑centered design approach, built to address our customers’ technical and business challenges.
End‑to‑end support for your projects
From requirements definition to production deployment — and even ongoing operations
Not familiar with the world of software development? No worries: we can step in from the very early stages of your project, from the design phase through deployment, and even beyond (hosting, evolutions, and operational maintenance).
Conversely, if your specifications are already defined and your infrastructure is in place, we focus on development and integration, while strictly respecting your technical and organizational constraints.
Formats tailored to your technical and organizational challenges
Our scope of intervention
Audit and recommendations
Needs analysis, objective definition, resource and schedule estimation. Coordination of milestones to secure project execution.
Contractual framework
Clear definition of scope, deliverables, and commitments. Establishment of a collaboration framework aligned with your constraints.
Dedicated team
Creation of a tailored project team, with capacity commitment and a defined service catalog. Technical and operational management provided by ADVANS Group, within a service center or fixed‑price project framework.
Delivery models
Remote or on‑site delivery at the customer’s premises, according to your preferences and project requirements.
Expert missions
Targeted mobilization of our experts on specific technical topics: architecture, performance, security, DevOps, etc.
Service catalog
Recurring or packaged activities defined in a catalog of units of work: development, testing, maintenance, support, documentation, and more.
Customized development processes
We favor an iterative approach, with regular deliveries and close collaboration with the customer. This co‑creation process allows features to be refined continuously based on field feedback.
We can also operate under more traditional delivery models, with clearly defined phases: scoping, design, development, testing, deployment, and maintenance.
Modern tools, proven expertise
Our technology stack
Below is an overview of the technologies we regularly use in our projects, continuously evolving them to stay at the forefront. This stack is not restrictive: we adapt to your specific needs and can integrate other environments when project requirements demand it.
Front-end
React, Angular, Vue.js
Back-end
Node.js, Java, Python, .NET
DevOps
Docker, Kubernetes, GitLab CI/CD
Cloud
AWS, Azure, GCP
Databases
PostgreSQL, MongoDB, MySQL
AI supporting code development
Intelligent agents for error analysis, correction suggestions, and continuous code improvement.
Engineering solutions for all industrial sectors
ADVANS Group operates across a wide range of industries, delivering state‑of‑the‑art engineering solutions tailored to the specific needs of each domain. Our expertise spans travel, industry and energy, medical, aerospace, defense, IoT, telecommunications, and many others.
Our expertise in action: custom software solutions
Project references
Each project is designed to address specific business, technological, or organizational needs. Our teams work on mission‑critical systems, complex platforms, and modern architectures, ensuring robustness, performance, and seamless integration. Below are a few examples illustrating our expertise in custom software development — ranging from business applications and scientific tools to embedded systems — using proven technologies and quality‑driven practices.
Secure medical platform for healthcare professionals
For a National Council of healthcare professionals, we supported the digital transformation of business processes. The first project involved implementing a system enabling online payment of annual fees, access to agreements, the training portal, and administrative data. The second project digitalized all business processes, with critical functionalities such as medicine traceability, reporting of animal mistreatment, vaccination management, and intervention traceability. We developed a web platform covering 12 functional domains, with a team of around fifteen engineers (front‑end, back‑end, QA, PO). The technology stack included Java Spring, Hibernate, RabbitMQ, as well as Docker and Kubernetes for a microservices architecture.
E‑commerce platform for travel booking
For a leading player in the tourism sector, we migrated a legacy e‑commerce platform to a modern cloud architecture. The objective was to improve performance, availability, and maintainability while integrating advanced online booking features. The team consisted of five engineers (back‑end and front‑end). The technology stack included Next.js / React on the front‑end, Java / Spring on the back‑end, and deployment on AWS using Kubernetes. Quality and documentation were ensured through SonarQube, Swagger, and GitLab CI/CD.
Modernization of computation tools for aerospace
We contributed to the refactoring of design and computation tools used in the aerospace industry. The project involved modernizing a legacy 600,000‑line Fortran 77 codebase by integrating it into a more flexible architecture through Python wrapping and an API connected to a PyQt5 graphical interface. The objectives were to improve usability, reduce study lead times, and enable new modeling capabilities. Technologies used included Fortran 77/90, Python, NumPy, Matplotlib, PyQt5, VTK, XML, with Git for configuration management and Jenkins for continuous integration.
Data acquisition system for ocean monitoring
We designed and developed a new acquisition system for a fleet of oceanographic sensors. The system continuously collects data sent by sensors embedded on vessels and provides a web interface for configuration and monitoring. Initially developed in AngularJS, the application was rewritten in Angular 7 to improve usability and performance. The architecture is based on microservices with Spring Boot, an ActiveMQ message broker, and REST‑based communication. The project team included three engineers (one technical lead and two Java/Web developers).
Candidate management platform
Faced with the limitations of off‑the‑shelf solutions, AVISTO designed and developed a custom web platform to manage the entire recruitment process for ADVANS Group. Scalable, robust, and interconnected, it centralizes job postings, applications, and HR communications, in France and internationally. The solution relies on a modern architecture: Java/Spring Boot back‑end, PostgreSQL database, and an Angular or React front‑end depending on the modules. It exposes REST APIs and evolves continuously to meet business and technical needs.
Digital solution to streamline the restaurant experience
As part of an intrapreneurship initiative, two engineers from AVISTO, a company within ADVANS Group, imagined a mobile application allowing restaurant customers to order and pay directly from their smartphone. AVISTO supported the development of this innovative solution, from technical design to deployment. Since then, the project founders have created the company Owneat, which continues to develop and commercialize the solution.
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Your questions about custom software development – Answers from ADVANS Group
Questions fréquemment posées (FAQ)
Do you have questions about the technical challenges, key steps, or approaches involved in custom software development? This FAQ compiles answers to the most frequently asked questions to help you better understand our expertise, our methods, and the solutions we offer.
When choose custom software development
When should you choose custom software development?
Custom software development is relevant when business needs cannot be effectively covered by off‑the‑shelf solutions, or when functional, technical, or organizational constraints are highly specific.
It enables the design of software aligned with real‑world usage, existing processes, and long‑term evolution requirements.
Rework an existing software
When is it necessary to take over or redesign existing software?
Taking over an existing software solution becomes relevant when maintenance becomes difficult, technical debt accumulates, performance degrades, or when the business, regulatory, or technological context evolves.
This can range from a targeted audit to a progressive or full redesign, depending on the state of the codebase, the architecture, and medium‑ to long‑term objectives.
Requirements partially defined
How should a software project be structured when requirements are only partially defined?
When requirements are not fully stabilized, it is recommended to adopt a progressive approach that helps clarify usage and priorities throughout the project.
Scoping, prototyping, or incremental development phases help reduce risks while providing visibility into functional and technical choices.
Quality, performance & scalability
How can quality, performance, and scalability be balanced in custom software?
The quality of custom software relies on sound architectural choices, rigorous development practices, and appropriate testing mechanisms.
These elements ensure controlled performance while enabling the software to evolve in response to future needs and technological changes.
Technical debt
How can technical debt be anticipated and controlled in a custom software project?
Technical debt refers to design or implementation choices that speed up short‑term delivery but make long‑term evolution and maintenance more complex.
Controlling it requires appropriate architectural decisions, regular reviews, and explicit trade‑offs between delivery speed and maintainability.
Anticipating technical debt from the design phase helps limit long‑term risks and avoids costly refactoring efforts.
Security
How is security addressed in a software development project?
Software security is integrated from the design phase, through architectural choices, adapted development practices, and control mechanisms proportionate to the system’s level of criticality.
The goal is to protect data, access, and software usage throughout its entire lifecycle.
Sustainability
How can the long‑term sustainability of a software solution be assessed?
Software sustainability depends on maintainability, architectural clarity, code quality, and the ability to evolve without major rework.
Appropriate technology choices and structured management of changes are essential to ensure long‑term durability.
Your project
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