Tech Lead

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.

About the Role

This position is designed for a generalist engineer who has experience shipping B2B SaaS features in a startup environment. You will work across the full stack using TypeScript and Postgres while managing cloud systems and modern development tools to build products from the ground up. The role requires a fast-paced approach to problem-solving and a desire to own features from conception to deployment. This is a hybrid role based in Bangalore with a compensation of 20 LPA.

What You'll Do

• Build and ship production-ready B2B SaaS features.
• Own features from design through deployment.
• Develop full-stack applications using TypeScript.
• Design and optimize Postgres databases.
• Deploy and maintain applications on cloud platforms.
• Collaborate closely with product and design teams.
• Use modern development tools and AI-assisted coding workflows to improve engineering velocity.

Required Skills

• Full-stack software engineering experience in an early-stage startup.
• Experience shipping production features used by real customers.
• Strong proficiency with TypeScript.
• Strong understanding of Postgres and relational database design.
• Experience deploying and maintaining cloud-based applications.
• Familiarity with modern coding tools and AI-assisted development workflows.

Preferred Background

• 1–2 years of experience after graduation or equivalent startup internship.
• Experience at Seed or Series A startups.
• Comfortable taking ownership with minimal supervision.
• Passion for building products in fast-paced startup environments.

Must-Haves

• Early-stage startup experience.
• Full-stack engineering background.
• TypeScript expertise.
• Postgres expertise.
• Cloud systems knowledge.
• Experience shipping production features to real users.

Nice to Have

• Experience with B2B SaaS products.
• Exposure to modern AI-assisted development tools.
• Experience working directly with founders or small engineering teams.

About the Role :

We are seeking a highly skilled Lead Software Developer with a strong background in SaaS product development and expertise in designing scalable, secure, and resilient systems. You will lead the technical architecture of our cloud-native platforms, manage cross-functional

engineering efforts, and implement best practices across backend, frontend, and infrastructure layers.

This is a leadership role based on-site in Jaipur and ideal for someone who enjoys solving complex system challenges and building high-impact software.

Key Responsibilities:

● Lead the design and implementation of scalable SaaS application architecture

● Architect and develop solutions using Laravel, NestJS, Node.js, and AWS

● Build and manage microservices and serverless infrastructure for high availability and maintainability

● Implement and manage asynchronous and parallel request handling for optimized system performance

● Design and scale load handling and queue management systems using BullMQ and Redis

● Develop and integrate real-time data workflows using webhooks and external APIs

● Configure and manage Node.js clusters for performance and fault tolerance

● Collaborate with frontend developers working on React and Vue.js to deliver seamless UI/backend integration

● Ensure code quality, observability, and maintainability across services

● Monitor, debug, and resolve issues in production using logs and performance tracking tools

● Drive CI/CD implementation, infrastructure automation, and DevOps practices

Required Skills & Qualifications:

● 5 - 7 years of experience in full-stack or backend software development

● Proven experience as a Lead Developer on SaaS products

● Proficient in Laravel, NestJS, and Node.js

● Deep understanding of BullMQ, Redis, and message/queue-based architectures

● Experience with asynchronous processing, parallel request handling, and load distribution

● Proficient in microservices and serverless architecture patterns

● Strong command of AWS (EC2, Lambda, RDS, S3, API Gateway, IAM, CloudWatch)

● Hands-on experience with webhooks, job queues, background tasks, and rate-limiting strategies

● Familiarity with Node.js cluster mode and scaling strategies

● Solid experience in debugging, tracing, and performance monitoring

● Frontend integration experience with React or Vue.js (please specify your exposure)

● Strong leadership, collaboration, and mentoring abilities

Preferred Skills (Nice to Have):

● Experience with Docker, Kubernetes, and CI/CD pipelines

● Exposure to event-driven architecture and multi-tenant SaaS platforms

● Familiarity with observability tools such as Grafana, Datadog, or New Relic

About the Role

We are looking for a Technical Lead with 5–7 years of experience in the JavaScript/TypeScript and Node.js ecosystem to drive core platform development. This is a hands-on leadership role that requires strong backend expertise, as well as exposure to mentoring and team management.

Key Responsibilities

• Lead development of core platform components including frameworks, APIs, and backend services
• Design and build scalable RESTful APIs and microservices using Node.js (NestJS preferred)
• Take ownership of system design, architecture, and performance optimization
• Mentor junior developers and ensure adherence to coding standards and best practices
• Drive Agile development (JIRA-based) and ensure smooth sprint execution
• Collaborate with cross-functional teams (UI, DevOps, Product)
• Conduct code reviews and enforce efficient coding using DSA principles
• Manage version control and collaboration using Git/Bitbucket

Required Technical Skills

• Strong proficiency in JavaScript / TypeScript
• Hands-on experience in Node.js (NestJS preferred)
• Good understanding of Data Structures & Algorithms (DSA)
• Experience with SQL databases
• Strong knowledge of REST services and API development
• Experience with Git (version control)
• Understanding of backend architecture and scalable systems

Good to Have Skills

• Experience with Bitbucket
• Knowledge of AWS Cloud (EC2, S3, Load Balancer)
• Exposure to SAP UI5 or frontend frameworks
• Basic understanding of CI/CD pipelines and DevOps practices

Leadership & Behavioral Skills

• Experience in team handling / mentoring developers
• Strong knowledge of JIRA and Agile methodologies
• Excellent problem-solving and analytical thinking
• Strong communication and stakeholder management skills

Senior Full Stack Developer – Analytics Dashboard

Job Summary

We are seeking an experienced Full Stack Developer to design and build a scalable, data-driven analytics dashboard platform. The role involves developing a modern web application that integrates with multiple external data sources, processes large datasets, and presents actionable insights through interactive dashboards.

The ideal candidate should be comfortable working across the full stack and have strong experience in building analytical or reporting systems.

Key Responsibilities

• Design and develop a full-stack web application using modern technologies.
• Build scalable backend APIs to handle data ingestion, processing, and storage.
• Develop interactive dashboards and data visualisations for business reporting.
• Implement secure user authentication and role-based access.
• Integrate with third-party APIs using OAuth and REST protocols.
• Design efficient database schemas for analytical workloads.
• Implement background jobs and scheduled tasks for data syncing.
• Ensure performance, scalability, and reliability of the system.
• Write clean, maintainable, and well-documented code.
• Collaborate with product and design teams to translate requirements into features.

Required Technical Skills

Frontend

• Strong experience with React.js
• Experience with Next.js
• Knowledge of modern UI frameworks (Tailwind, MUI, Ant Design, etc.)
• Experience building dashboards using chart libraries (Recharts, Chart.js, D3, etc.)

Backend

• Strong experience with Node.js (Express or NestJS)
• REST and/or GraphQL API development
• Background job systems (cron, queues, schedulers)
• Experience with OAuth-based integrations

Database

• Strong experience with PostgreSQL
• Data modelling and performance optimisation
• Writing complex analytical SQL queries

DevOps / Infrastructure

• Cloud platforms (AWS)
• Docker and basic containerisation
• CI/CD pipelines
• Git-based workflows

Experience & Qualifications

• 5+ years of professional full stack development experience.
• Proven experience building production-grade web applications.
• Prior experience with analytics, dashboards, or data platforms is highly preferred.
• Strong problem-solving and system design skills.
• Comfortable working in a fast-paced, product-oriented environment.

Nice to Have (Bonus Skills)

• Experience with data pipelines or ETL systems.
• Knowledge of Redis or caching systems.
• Experience with SaaS products or B2B platforms.
• Basic understanding of data science or machine learning concepts.
• Familiarity with time-series data and reporting systems.
• Familiarity with meta ads/Google ads API

Soft Skills

• Strong communication skills.
• Ability to work independently and take ownership.
• Attention to detail and focus on code quality.
• Comfortable working with ambiguous requirements.

You are required to possess good knowledge of PHP and experience in Laravel repository.

Responsibilities and Duties:

• Work alongside a broader team with a focus on Design, UX, Optimization, Back End processes, DevOps Efficiency with the goal of delivering high-quality projects using the latest tech stack.
• A keen eye for detail, along with a passion to deliver quality, customer-focused solutions is absolutely essential.
• Championing Web Development: You will be responsible for handling web development from ideation to production.
• Collaboration with product manager and other developers, owning a large part of the process from problem understanding to shipping the solution.
• Contribute best-in-class programming skills to develop highly innovative, consumer-facing web products.

Key Skills:

PHP MVC Framework Laravel, API Integration and Development, HTML5, CSS3, JavaScript, Version Control Systems, Repository Management, Basic understanding to work on AWS 

Required Experience and Qualifications:

Desired Profile:

• Great skills in PHP MVC framework Laravel.
• Extensive Experience in API integration and development is required.
• Experience in HTML5, CSS3, and JavaScript is required.
• Experienced with version control systems and repository management.
• Experience working and configuring AWS is a huge plus. but a basic understanding to work on AWS is required.
• Passionate about writing clean, efficient, and maintainable code.
• Strong analytical and debugging skills and experience building consumer systems at scale.