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Custom React Development Services
Cut overhead with quick onboarding
Projects delivered
Years on the market
Software EngineersServices
REACT WEB AND MOBILE APPLICATION DEVELOPMENT
With extensive expertise in React and other JavaScript libraries and frameworks, developers at Altoros build advanced web and mobile solutions to suit the custom needs of any project. We create complex systems using Angular,, React Native, Ionic and other technologies, starting with the architecture before programming. Reap the benefits of progressive, dynamic, and mobile-friendly applications with reusable components.
PROGRESSIVE WEB APPLICATION (PWA) DEVELOPMENT WITH REACT
Relying on the new application software offered by Google Progressive Web Apps with the ability to work offline, we help you to build engaging solutions that deliver native mobile experience right from your browser. Along with being portable across both desktop and mobile platforms, PWAs running on mobile devices can perform much faster and provide more features, closing the gap with native apps.
APPLICATION PORTING TO REACT
We provide an intact and fast cross-technology migration of apps and disparate components to React for you to get robust applications. Benefit from increased performance of your apps, components reusability, and better user experience.
REACT CONSULTING SERVICES
Define the right technology roadmap and elaborate on a working strategy of development and implementation. Our React consultants and experts offer strategic advice, guidance, and technical expertise required to assess the current state of your applications, detect limitations, provide recommendations on suggested improvements, and spot opportunities for growth.
REACT APPLICATION MAINTENANCE & SUPPORT
Improve the performance of your React application starting from adding new features and functionality to global changes and optimization. Our experts will help you to stay up-to-date with all of the industry trends and features, assisting in updating and migrating your existing React projects to the latest React versions.
REACT FULL-STACK DEVELOPERS
Hire seasoned React developers and dedicated teams to serve your project needs. Take advantage of our strong expertise in a wide range of technologies and employ full-stack engineers with solid knowledge in the front- and back-end development, cloud technologies, and data engineering. We offer a risk-free trial period and team retention guarantee.
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Let's discuss your project
Get your consultation nowRemote Dedicated ReactJS team as a service
Altoros offers you to extend your in-house talent with our React dedicated team of engineering professionals, architects, and project managers with proven experience in creating architecture, building complete solutions, deployment, and production operations.
92% of our employees are senior- or mid-level engineers with degrees in computer science or math.
Our core strength lies in an ability to enhance your current teams with our talent or build elite teams from the ground up.
What does a zero-risk trial period mean?
We put customer satisfaction as a major priority. A key differentiator between us and other software engineering companies is that we guarantee efficient custom software development. In case you are not satisfied with the results achieved, we will not charge you for the work done by our software developers in the course of the first two weeks of the project. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial.
One-person team
A profound expert focused on a required field, complementing your existing team.
Dedicated team
A custom team comprising 2–10 professionals to assist in the development process or support an ongoing project.
Dedicated team + leader
A dedicated team managed by a team leader to take full responsibility for your project—from a prototype to an MVP.
Progressive web apps
Native app experience right in your browser
We build fast, portable, and highly engaging progressive web apps that help to enhance the user experience, increase loading time, and keep working offline.

Why PWA?
Discover and share instantly
PWAs are easily discovered by search engines and can be shared as an URL in just a click.
Tailored just for you
Stay tuned to the relevant feed customized for you, while enjoying push notifications.
Offline mode
No Internet connection or low-quality networks are not the issue anymore as PWAs work perfectly fine offline backed up by service brokers.
Always up-to-date
No longer worry about updating the app as PWAs are always available with the latest upgrades and top-notch features already installed.
Inclusive experience
You may allow PWAs to identify your location, device orientation and motion, as well as make use of your video / audio inputs.
Cross-platform
PWAs provide the same satisfying operation across all your favourite devices, be it desktop, web, mobile, or a tablet.
Progressive and secure
PWAs use HTTPS to bring you robust performance in any browser of choice.
Native app experience
PWAs deliver truly native user experience with ergonomic interactions and intuitive navigation.
WHY PARTNER WITH US
Find out more about the technology
Contact Altoros’s expertsRelated cases
The team at Altoros has successfully implemented 1400+ projects, some of which can be accessed through this page. We do also share more details on a particular project and other stories of success on demand. Please do not hesitate to reach out to us with a request!

Developing a Business Process Modeling Solution
The customer
The customer is a leading European provider of business process and enterprise content management solutions. Established in 2003, the company serves 450 organizations across the globe, including 25% of the CAC 40 firms in France. The customer had a system that facilitated management of business-critical workflows around sales, marketing, finance, and human resources activities. However, the existing software lacked a component for creating and editing diagrams illustrating those workflows. Collaborating with Altoros, the customer wanted to develop a tool for business process modelling compatible with the Business Process Model and Notation 2.0 (BPMN 2.0) specification.
The need
The customer had a system that facilitated management of business-critical workflows around sales, marketing, finance, and human resources activities. However, the existing software lacked a component for creating and editing diagrams illustrating those workflows.
Collaborating with Altoros, the customer wanted to develop a tool for business process modelling compatible with the Business Process Model and Notation 2.0 (BPMN 2.0) specification.
The challenges
- According to the customer’s requirement, the delivered tool had to be reusable, so it would be possible to integrate it anywhere on demand.
- Due to a cyclic nature of BPMN diagrams, solutions capable of storing only normalized tree structures were not an option.
-
BPMN
compliant
-
25
partners
-
450
firms served
The outcome
Partnering with Altoros, the customer developed a solution for creating and editing diagrams, which visualize business-critical processes. Compliant with the BPMN 2.0 specification, the tool allows for working with any diagrams supporting this standard. As the solutions is reusable, it can be integrated anywhere on demand.
Technology stack
Programming Language - JavaScript
Frameworks and tools - React, SCSS, Jest, Git Hooks, ESLint


A Provider of Customer Reviews Cuts Response Times by 2x
The customer
Based in Germany, the company is a provider of a platform that enables businesses to gather customer reviews and ratings from multiple sources, manage them, and interact with the audience. Founded in 2016, the organization serves retail, manufacturing, information technology, and other industries.
The need
The customer’s review management platform was built on top of the very first version of Angular and never got updated. As the user base grew, it became necessary to introduce new features and improve the existing ones. However, an outdated technology stack significantly complicated maintenance and disrupted user experience.
Collaborating with Altoros, the company wanted to migrate to a modern technology stack, improving maintenance and implementing new functionality.
The challenges
- It was important to conduct migration without downtime.
- Each time a user searched across reviews or ratings, the page would reload. This generated a lot of cache and, consequently, had a negative impact on performance.
- The platform had to gather user preferences from 27 sources and analyze them across dozens of dynamic metrics. All this data had to be visualized in charts, configurable by metric type and responsive to real-time changes.
-
2x
faster response time
-
27
review sources
-
2–3
weeks release cycle
The outcome
Partnering with Altoros, the company migrated its review management platform to a modernized stack without downtime. This helped to improve maintenance, reduce response time by 2x, and seamlessly introduce new functionality every 2–3 weeks. By integrating the system’s review count module with Google My Business, the organization enabled its customers to easily create and verify accounts on the search engine. This contributed to placing businesses on Google Maps and making them visible to a larger local audience during search.
Technology stack
Programming Languages - TypeScript, JavaScript
Frameworks and tools - React.js, Node.js, React DnD, Highcharts, SWR, webpack, ESLint, Prettier


Enabling Real-Time Data Processing for a Fleet Management Platform
The customer
Operating at the intersection of hardware and connected technologies, the company is a global provider of enterprise solutions for the logistics, automotive, and trailer management industries. Founded in 1989, the organization designs and manufactures connected ecosystems for RFID- and cellular-enabled devices.
The need
The customer had an IoT-based solution for fleet management (trucks). However, the platform was unable to process huge amounts of data—gathered from 5,300 devices—in real time.
Partnering with Altoros, the customer wanted to improve data processing and develop a similar solution for motorcycle riders.
The challenge
Under the project, the team at Altoros had to address the following issues:
- It was important to ensure that the solution can process 36,000 records per hour.
- It took almost 10 minutes to execute database queries.
- The system could not define geofences on the map, which prevented it from sending out automatic alerts when a device exits/enters a particular area.
-
1M+
users
-
5,300
devices
-
36,000
records
The outcome
Partnering with Altoros, the customer enabled real-time data processing for its fleet management platform. Now, the system is capable of analyzing 36,000 records per hour gathered from 5,300 connected devices. The company also developed a solution for motorcycle riders, which community already has over 1,000,000 users.
Technology stack
Platform - Xively
Programming Language - TypeScript
Frameworks and tools - React, Redux, Node.js, AWS SNS, AWS Elastic Beanstalk, Amazon ElastiCache, AWS Lambda, Amazon Kinesis, MQTT
Databases - Aurora PostgreSQL


Building a Secure, Immutable Ledger for Storing Medical Records
The customer
Based in the United Kingdom, the company is a provider of business-to-business blockchain protocol implementations for healthcare. The customer aims to integrate existing EHR systems with a blockchain network and bring in automation.
The need
The majority of medical institutions operate highly centralized systems that store patient data. Being governed by a single point of authority, these systems significantly complicate access to patient history once a person changes a doctor or a hospital. The process also lacks transparency for different specialists handling the same patient.
Therefore, the customer turned to Altoros to develop a decentralized solution for maintaining medical records, aiming to increase transparency while preserving privacy.
The challenges
First and foremost, the system had to be extremely secure, since it deals with highly sensitive patient data. At the same time, it had to manage and process a variety of hi-scale images (X-ray, MRI, etc.), as well as unstructured or semi-structured text and PDF documents (such as prescriptions, treatment lists, or lab test results).
The outcome
Cooperating with Altoros, the customer developed a decentralized blockchain system for storing medical records in an immutable, transparent, and secure manner. Unlike common blockchain systems that store key-value pairs only, the solution can handle large images (X-ray, MRI, etc.) and other documents important for patients’ medical history.
The system can be customized for the needs of different medical institutions.
After having delivered this proof of concept, the customer partnered with one of the leading global software providers (a Premier Member of the Hyperledger Foundation).
To enable the system to store a variety of hi-resolution images (X-ray) and semi-structured PDF documents (prescriptions and lab tests), our developers integrated a distributed, peer-to-peer IPFS file system.
Finally, the engineers optimized the chaincode structure to prevent the ledger from duplicating data entities, such as a document, a record, etc.
Technology stack
Server platform Hyperledger Fabric v1.4
Programming languages JavaScript, Go
Technologies Node.js, Bash, React.js, Ansible, Apache Kafka, ECDSA, IPFS
Database RethinkDB


Reducing Infrastructure Costs and Release Cycles for a FinTech Vendor
The customer
The company is a U.S. provider of currency hedging and exchange execution services to investors and financial institutions. Since its foundation in 2013, the customer raised $4.1 million in funding.
The need
The company had a platform that facilitated currency hedging and asset management to mitigate risks imposed by currency fluctuations. Nine global corporations were using the platform to offset potential losses on investments due to exchange rates. At some point, the customer recognized value in white-labeling its product. As part of this plan, the organization partnered with one of the leading financial holding companies in the world, growing its clientele to 95 corporations.
Each of these corporations had different processes, systems, and technology stacks that the platform needed to easily integrate and comply with. This required introducing a lot of customizations in an agile manner.
Relying on Altoros, the customer wanted to automate and speed up feature delivery. With the white-labeling strategy in force, the company also sought scalability, high availability, and ease of maintenance.
The challenges
Under the project, the team at Altoros had to address the following issues:
- As the platform analyzed sensitive financial information, ensuring proper data security was crucial.
- It was important to maintain high integrability of the product due to different internal processes, technology stacks, etc., of corporations using the system.
-
1 week
from idea to production
-
2x–4x
faster delivery
-
2x
less infrastructure costs
The outcome
Partnering with Altoros, the customer was able to successfully execute its white-labeling strategy by offering a FinTech product that eases an adoption curve, features high integrability, and minimizes customization. The migration to a cloud-native PaaS that has a mature ecosystem of services enabled the company to reduce release time by 2x–4x, cut down expenses on infrastructure maintenance by 2x, as well as ensure scalability and high availability. Thanks to a variety of the implemented security measures, the organization can also address the primary concerns of the financial industry.
Technology stack
Platform Heroku
Programming language Ruby
Frameworks and tools Ruby on Rails, React.js, Amazon S3, Amazon SNS, Amazon QuickSight, Amazon SageMaker, Redis, Code Climate, RuboCop
Databases PostgreSQL, MongoDB


Automation of Appointment Schedules for Doctors and Patients
The customer
Established in 1986, the customer is a medical ward based in Oslo, Norway. The organization offers several medical services: health checkups, laboratory tests, surgical operations, etc. The institution also provides biannual checkups for the employees of multiple organizations across the country.
The need
Twice a year, corporate employees in Norway have to go through obligatory physical checkups. The medical center was delivering this service to 20 companies. Initially, appointment scheduling was conducted manually via phone calls and by using spreadsheets. This was inefficient, time-consuming, and led to human error and conflicts between schedules. As a result, it was impossible to neither provide a quality service, nor fully focus on other daily routines. During the COVID-19 pandemic, these issues escalated due to the increased burden on medical staff.
With a view to expand its business and cater to more corporate customers, the institution relied on expertise at Altoros to automate the scheduling procedure.
The challenges
It was important to ensure that medical workers with no technical background could easily manage tasks such as addition of new doctors, their vacations or sick leaves, etc. The ward collects, processes, and stores personal data of European Union citizens, so the system had to comply with the General Data Protection Regulation (GDPR).
-
750,000+
users
-
100+
companies
-
GDPR
compliance
The outcome
Partnering with Altoros, the customer automated time-consuming and inefficient manual processes around biannual physical checkup. As a result, the ward can now provide healthcare checkups to 100+ companies, being able to serve up to 750,000 corporate patients. Now, the healthcare institution can deliver a timely service without interrupting its other daily routines, saving hundreds of hours for medical staff.
In future, the customer plans to white-label the delivered system and offer it to other medical organizations seeking this kind of automation, building an additional revenue channel.
Technology stack
Platform - Amazon AWS
Programming language - JavaScript
Frameworks and tools - Amazon Simple Email Service, Amazon Lightsail, Node.js, React, React-Router, Redux, Redux-Saga, Ant Design, Fastify, REST, Swagger UI, Webpack, Sequelize
Database - PostgreSQL


Enabling Accessibility of an E-learning Language Platform
The customer
The customer is a leading provider of language training services to individuals and businesses in Norway. Accredited by the Ministry of Education, the company also delivers language courses and social studies to immigrants. The organization has educational centers in major Norwegian cities, including Oslo, Bergen, and Stavanger.
The need
The company had a proprietary web app enabling users to test their language skills. The customer was working toward building a fully fledged e-learning platform based on the existing app. The platform would provide access to a variety of language courses and testing materials for students across Norway.
Collaborating with Altoros, the organization wanted to deliver functionality critical to interactive online learning, improve the existing features, and integrate billing. The customer aimed to get certification from Skill Norway, a governmental Agency for Lifelong Learning that belongs to the Ministry of Education and Research. In this regard, necessary functionality had to be enabled under the tight deadlines.
The challenges
- It was important to ensure stable performance of the system while enabling smooth display of heavyweight interactive educational games and lessons.
- A possibility to record audio was one of the essential features for both teachers and students. To accelerate streaming and the processing of media during learning sessions, it was crucial to unify audio formats across a variety of browsers and operating systems.
- As the platform would also be utilized by people with disabilities, compliance with Web Content Accessibility Guidelines (WCAG) had to be achieved.
-
3,000
students
-
$1.2M
investment
-
50+
schools
The outcome
Partnering with Altoros, the customer delivered functionality vital to interactive language learning online, while maintaining the system’s availability and performance. Compliant with the WCAG standards, the platform is accessible to students with disabilities, safeguarding equality across education for all society members. Thanks to the enabled functionality, the company showcased the solution at the governmental level, winning a tender to connect a chain of 50 language schools to the platform and raising nearly $1.2 million of investment. Now, the product serves 3,000 students across the country.
At the moment, the customer continues collaborating with Altoros to build mobile apps for iOS and Android.
Technology stack
Programming language - TypeScript
Frameworks and tools - React.js, ReactPlayer, Redux, Howler.js, Audio Recorder Polyfill, LottieFiles, Framer Motion, wavesurfer.js, Testing Library, styled-components
Database - PostgreSQL


Developing a System for Managing Roof Truss Production
The customer
Operating globally, the company is a leading producer of fully automated solutions for the building component manufacturing industry. With patented smart robotics technology under the hood, the organization provides a revolutionary roof truss production system.
The need
When the customer turned to Altoros, it had an existing CAD-like software—for roof truss designers—implemented as a proof of concept. However, the solution’s functionality was not mature enough to be used in production.
Collaborating with Altoros, the company wanted to optimize the existing functionality, as well as develop some business-critical components.
The challenges
Under the project, the team at Altoros had to address the following issues:
- The system’s immature API with its unpredictable behaviour might cause failures at any step of the truss production line.
- To avoid redesigning defective trusses from scratch, it was important to ensure control of individual truss elements.
- The system’s performance had to be stable even in case of a network error.
- The solution had to be compatible both with the Windows and Linux operating systems.
The outcome
Partnering with Altoros, the company turned its proof of concept into an enterprise-grade solution capable of customizing the sequence of steps performed by a robot at the truss production line and taking a defective truss element off the production line. With improved API, the system is fault tolerant and minimizes risks of unexpected failures at production.
Technology stack
Platform Linux, Windows
Programming languages Ruby
Frameworks and tools Ruby on Rails, Docker, Node.js, React, Redux, MobX, dry-rb, rom-rb
Databases PostgreSQL, Redis

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About Altoros
Altoros is a professional software development company with headquarters in Pleasanton (USA), branch offices in Norway and Finland, and development centers in the USA, Canada, Argentina, Ireland, Poland, Moldova, Turkey, and Georgia. With 20-year IT experience and a strong team of full-stack software engineers and consultants, we help our clients to achieve unsurpassed quality at all stages of the web, mobile, and desktop application development. By providing multiple time-zone teams and different formats of working (onsite, remote, hybrid, etc.), we help organizations across the globe to gain sustainable competitive advantage through the adoption of innovative technologies.Research & Development
The R&D department within Altoros keeps track of the latest technologies available on the market from 2011. The main goal of the department is to learn how projects can be developed faster, better, more effectively, and more efficiently. Our studies are mostly focused on big data solutions, data science, cloud computing, and cross-platform development.Contact us now
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Headquarters
4900 Hopyard Rd., Suite 100Pleasanton, CA 94588 -
Altoros Finland OY
Kyllikinportti 2,00240 Helsinki, Finland -
Altoros Norge AS
Tordenskiolds gate 2, 0160 Oslo, Norway -
Development Center, Poland
Młynarska st. 42 /115,01-171 Warsaw -
Development center, Argentina
Buenos AiresAv. Federico Lacroze 2827,C1426CPP CABA, ArgentinaSanta Fe25 de Mayo 2884, S3000FUASanta Fe, Argentina






























