Fullstack Developer -Java Angular ([email protected])

About

Numispark is a France-based web and mobile development agency. We design, build and maintain custom digital products for clients across France and Europe — mobile applications, booking and marketplace platforms, e-commerce systems and business management tools.

We work with a modern JavaScript stack across mobile and web, and we manage our own production infrastructure. Our engineering culture is remote-first, asynchronous, and built around clear written communication and end-to-end ownership of what we ship.

The Role

We are looking for a Full Stack Developer to build and deliver production applications across mobile and web. You will work across the complete development lifecycle — designing APIs, building cross-platform mobile applications, developing web interfaces, and deploying and maintaining systems in production.

This is a hands-on engineering position with real ownership of features and release cycles. You will see your work reach live users on a short cycle, and you will have meaningful input into technical and architectural decisions.

Key Responsibilities

• Develop and maintain cross-platform mobile applications using React Native for Android and iOS
• Design and build RESTful APIs with Node.js and Express
• Model, query and optimise MongoDB databases for production workloads
• Build responsive web interfaces using React and Next.js
• Deploy and maintain applications on Linux servers using Docker, including CI/CD pipelines, reverse proxy configuration, SSL and database backup procedures
• Manage Play Store and App Store submissions, versioning and release cycles
• Maintain, extend and improve existing production applications
• Participate in code reviews and follow Git-based development workflows
• Communicate progress and technical decisions clearly in written English

Required Qualifications

Experience

• 3–6 years of professional software development experience
• Minimum 2 years of hands-on experience with React Native
• At least one React Native application published on the Play Store or App Store, with a clear description of your contribution

Frontend and Mobile

• React Native — navigation, native module integration, performance optimisation, platform-specific implementation
• React.js — hooks, component architecture, state management (Redux, Zustand or Context API)
• Next.js — SSR, SSG and App Router
• Strong JavaScript ES6+ fundamentals, including asynchronous programming patterns
• TypeScript in production environments
• Firebase — push notifications, analytics and crash reporting

Backend

• Node.js and Express — REST API design, middleware, error handling
• MongoDB — schema design, indexing, aggregation pipelines, Mongoose
• Authentication and authorisation — JWT, OAuth, role-based access control
• Real-time features — WebSockets and Socket.io
• Payment gateway integration — Stripe and Razorpay

Infrastructure and DevOps

• Proficiency on the Linux command line
• Docker — writing Dockerfiles, docker-compose, container troubleshooting
• Demonstrated experience deploying and maintaining applications on self-managed servers
• Self-hosted deployment platforms — Coolify, Dokku, CapRover or equivalent
• CI/CD pipelines with GitHub Actions
• Nginx reverse proxy configuration and SSL certificate management
• Git — branching strategies, pull requests, conflict resolution

Other

• Professional written and spoken English
• Availability for a daily overlap window of 2:00 PM – 7:00 PM IST to align with European business hours

Preferred Skills

The following are not required, but strengthen an application:

Mobile

• React Native New Architecture — Fabric and TurboModules
• Native module development in Swift or Kotlin
• Automated release pipelines with Fastlane or EAS
• Offline-first architecture and local persistence (MMKV, WatermelonDB, SQLite)
• End-to-end mobile testing with Detox or Maestro

Web and Frontend

• Tailwind CSS and modern component libraries (shadcn/ui, Radix)
• Animation and interaction work — Framer Motion, GSAP, Reanimated
• Web performance optimisation — Core Web Vitals, Lighthouse
• Technical SEO fundamentals for Next.js applications
• Accessibility standards (WCAG)

Backend and Data

• Redis for caching and session management
• Job queues and background workers — BullMQ, RabbitMQ
• GraphQL and Apollo
• PostgreSQL and Prisma
• MongoDB replica sets, Atlas administration, aggregation performance tuning
• Automated testing — Jest, Vitest, Supertest

Infrastructure

• Object storage integration (S3-compatible)
• Monitoring and observability — Sentry, Grafana, Uptime Kuma
• Infrastructure automation and shell scripting
• Container orchestration basics — Docker Swarm or Kubernetes
• Database backup, restore and migration procedures at scale

Other Platforms and Tooling

• Flutter
• Shopify theme and app development
• Odoo customisation
• Mapping and geospatial development — Leaflet, Mapbox, MongoDB geospatial queries
• Transactional email and deliverability (Brevo, SendGrid, Postmark)
• AI and LLM API integration in production products
• Working from Figma designs
• Agile delivery with Jira, Linear or similar
• Clear technical documentation writing
• Working knowledge of French

What We Offer

• Competitive compensation of ₹6,00,000 – ₹8,00,000 CTC per annum, based on demonstrated experience
• Fully remote position, open to candidates across India
• Flexible working hours outside the daily overlap window
• International project exposure, working on products for European clients
• End-to-end ownership of features, from design through to production release
• Modern technology stack across mobile, web and infrastructure
• Scope to influence architecture and technical direction
• Continuous professional growth across the full engineering stack

Selection Process

1. Application review
2. Introductory call — 30 minutes
3. Technical assignment — 4 to 6 hours, compensated
4. Live technical discussion — 90 minutes, practical and collaborative
5. Offer

Typical timeline from application to offer: two weeks.

Role & responsibilities

1. Develop and maintain native Android applications using Kotlin and Java.

2. Familiarity with RESTful APIs to connect Android applications to back-end services

3. Work with APIs, third-party libraries and Familiarity with MVC, MVVM.

4. Proficient in code versioning tools including GitHub and Gitlab.

5. Familiarity with push notifications,and cloud messaging.

6. Identifying potential problems and resolving application bugs.

7. Fixing application bugs before the final release.

8. Publishing application on Play Store.

9. Maintain code quality and Ensure the performance, quality, and responsiveness of applications.

10. Collaborate with cross-functional teams for seamless integration.

11. Stay up to date with the latest industry trends and technologies.

Preferred candidate profile

• Minimum 3+ Years of Android Developer Experience or Created an App Before.
• Strong knowledge of Kotlin and Java.
• Experience with Jetpack Compose, Android Jetpack Components, Room, and Coroutines.
• Experience with UI/UX Designing, RESTful APIs and third-party libraries.
• Understanding of agile development methodologies.
• Strong problem-solving and debugging skills.
• Excellent communication and teamwork abilities.
• Knowledge of Firebase Integration is an added advantage.
• Previous experience in fintech industry considered as plus point.

Perks and benefits

• Competitive Salary and Professional development opportunities and training.
• Opportunity to work with cutting-edge technologies in a fast-paced environment.
• Collaborative and supportive work environment.

We are currently seeking a full stack software engineer that can architect, design, develop and test applications using the following technologies: React JS, Spring Boot and REST API

Responsibilities:

·      Architect and design scalable, resilient, and cost-effective solutions

·      Lead the engineering team on all design and development work.

·      Hands on with implementing solutions and functions which collaborates with AI/ML products.

·     Experience with system diagrams, technical specifications, implementation and support  plans.

·      Can work in close association with team and communicate efficiently with senior management on various Tech development aspects.

Qualifications:

·      Bachelor's degree/Masters/MS in Computer Science, Information Technology  or a related field..

·      8+ years of experience architecting and designing software solutions.

·      5+ years of experience using UI based technologies such as JavaScript/Typescript, React and/or Next JS

·      5+ years of development experience with Object Orientated Programming (e.g., Java, C++)

·      5+ years of experience with (CI/CD) and Agile methodology

·      5+ years of experience building large scale distributed applications.

·      Hands on experience developing custom file viewers.

·      Experience with web development frameworks, databases, and version control systems

·      Hands on experience with integrating the front end with the back end using REST API’s

Microservices specialists

Company Profile: Nucleus Software has been providing Products and Services to various Global and Regional Financial  institutions , from past 36 years. As a pioneer IT Service provider, Nucleus carry deep banking domain expertise and experience on latest technological trends. Nucleus’s developed platforms powers the operations of more than 150 institutions in 50 countries, supporting multiple business veritcals, accessible through Mobile and internet channels

Job description:

• Bachelor's or master’s degree in Computer Science, Information Systems, or other related field. Or equivalent work experience.
• Expertise with Java/J2EE experience including frameworks such as Spring REST, Spring Batch.
• Experience with Spring Boot, Microservices, NoSQL, caching and message queue technologies like Kafka.
• Good working knowledge of SQL databases (Oracle, SQL Server,MySql etc.,) and integrations with Spring DAO/REST/JPA.
• Integration experience consuming REST Services and developing REST Clients with third-party REST & SOAP Services with JSON/XML.
• Expertise on API concepts and technologies such as REST, JSON, XML, SOAP, YAML, GraphQL, and Swagger.
• Understanding of securing APIs with JWT/OAuth2/OpenID & Spring Security is a plus.
• Ability to manage Docker containers and exposure to Jenkins & CI/CD is a plus.
• Ability to understand business plans and apply that information into the scalable development models.
• Ability to guide, train, mentor associate engineers & collaborate with developers using agile practices.
• Proven ability to work creatively in a problem-solving environment.

Experince-6-9 yrs

Location: Noida or Chennai

Package: upto 20L

●       Deep knowledge and hands-on experience of Java & UI stack.

●       Proficient experience of web technologies, frameworks and tools like HTML, CSS, JavaScript, React, NodeJS, XML, jQuery, Spring, etc.

●       Should be well versed with State Management, Redux, Reducers, Java Script, CSS in ReactJS/UI

●       Practical experience of test-driven development and constant refactoring in continuous integration environment.

●       Experience in Oracle PL/SQL programming is required, knowledge of SQL and relational databases

●       Experience working in an agile team, practicing Scrum, Kanban, or XP

●       Experience of performing Functional Analysis is highly desirable.

●       Excellent communication and teamwork skills.

People skills:

●       End to end ownership in driving team towards delivery.

●       Performance and productivity orientation to promote high-quality results.

●       Profound analytical skills and problem-solving abilities.

●       Good communication and excellent interpersonal skills.

●       Pro-active and flexible working approach.

●       Ability to think outside the box to resolve problems.

●       Efficient and well organized, detail oriented.

What you need to have:

• Having around 10+ years of Experience in IT industry in Software Development.
• Having strong Python full stack developer.
• Having work Experience in OpenStack,Ansible, Shellscript, Chef, Puppet, Docker,ELK,OpenTSDB, Kafka, Zookeeper, Grafan
• Having work experience in SDN/NFV
• Having work experience in AWS,AZURE Cloud
• Experience in Python, HTML, CSS
• Having work experience in Open source and Open Flow Controller(SDN).
• Having work experience in Zabbix, Nagiso, OpenNMs Monitoring tool.
• Experience in Aglie methodology.
• Having work experience in Type1&Type2 Hypervisors and KVM.
• Having good knowledge on OOP'S concepts and Django ORM.
• Good Knowledge on MySQL ,Postgresql, HDFS, Timeseries
• Basic Knowledge on Javascript and Jquery.
• Good Knowledge on ONOS,OpenKilda,Mininet.
• Having work experience in SDN/NFV, Orchestration
• Having work experience in Supply Chain Management system.
• Having work experience in MVT/MVC architecture.
• Having good knowledge networks, devices, service modeling and automation in systems.
• Having work experience on API & JSON implementation.
• Good Understanding of Software Development (i.e. SDLC)
• Good team player enthusiastic and quick learner
• Good interpersonal skill, commitment, result oriented with a quest and learn new technologies and understanding challenging tasks

• Extensive experience in building REST APIs
• Experience in building, managing, and enhancing backend / server-side development using java / java scripts. Expertise in NodeJS is preferred
• The person must have built systems that consume and process volumes of data from various sources. Experience in handling and managing data in NoSQL databases such as Mongodb.
• Extensive experience of building custom UI for web using the popular frameworks like angular and react. Experience in developing mobile UI is nice to have
• Experience of working with code repositories such as Github and GitLab.
• Fluent written and spoken English.
• Experience of working on Cloud environments and experience in AWS is preferred.
• Experience in Dockers and Kubernetes for deployments

• Design and documentation of the CashLobe technology stack
• Code / implement the CashLobe technology stack
• Deploy and maintain the CashLobe technology stack
• Engage with leadership team to help evolve the CashLobe technology stack offerings

• Have pre-built deployment pipelines CI/CD across environments DEV/STAGING/PROD
• Knowledge of developing using Python and specifically the data/number crunching frameworks like NumPy, pandas, scikit, etc.
• Experience in the Fintech domain and specifically the banking & accounting systems