Full Stack Engineer (MERN)

Experience: 5+ years

Location: Mumbai - Andheri Marol

Company: Wissen Technology

Website: www.wissen.com

Job Description:

Wissen Technology is currently hiring experienced Full Stack Java Developers with strong expertise in Core Java, Spring Boot, front-end technologies (Angular/React), REST APIs, multithreading, data structures, and SQL.

You will be working on enterprise-grade solutions as part of a global development team tackling complex problems in domains like Banking and Finance.

This is an excellent opportunity to be part of a high-caliber, technically strong team delivering impactful solutions for Fortune 500 companies.

Key Responsibilities:

• Develop and maintain scalable, high-performance applications with a focus on both backend (Java/Spring Boot) and frontend (Angular/React).
• Participate in all phases of the development lifecycle – design, coding, testing, deployment, and maintenance.
• Work closely with cross-functional teams to understand requirements and deliver quality solutions.
• Optimize application performance and ensure responsiveness across platforms.
• Write clean, maintainable, and well-documented code.

Required Skills:

• 5+ years of hands-on experience in Java, Spring Boot.
• Strong proficiency in frontend frameworks like Angular or React.
• Experience with RESTful APIs, microservices, and web technologies (HTML, CSS, JavaScript).
• Sound knowledge of data structures, algorithms, and multithreading.
• Experience in developing and deploying enterprise-grade applications.
• Solid understanding of RDBMS (e.g., Oracle, MySQL, PostgreSQL).
• Exposure to DevOps practices, version control (Git), and CI/CD pipelines.
• Familiarity with Unix/Linux environments.
• Strong problem-solving, communication, and analytical skills.

Good to Have:

• Exposure to cloud platforms like AWS, Azure, or GCP.
• Understanding of containerization using Docker/Kubernetes.
• Knowledge of Agile methodologies.

About Wissen Technology:

Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in-class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals.

Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always ‘first time right’.

Our team consists of 1200+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.

Wissen Technology offers an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.

We have been certified as a Great Place to Work® for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.

Job Overview:

We are looking for a skilled Full Stack Developer with strong expertise in .NET/C#, React or Angular, and Azure basics to design, develop, and deploy modern web applications. The ideal candidate should have solid experience building scalable, secure, and high-performance solutions, with a passion for clean code and collaboration.

Key Responsibilities:

• Design, develop, and maintain web applications using C#, .NET Core, and SQL Server.
• Build responsive front-end user interfaces using React or Angular with TypeScript.
• Integrate and consume RESTful APIs and ensure smooth front-end/back-end communication.
• Deploy and manage applications on Microsoft Azure using basic PaaS services (e.g., App Services, Functions, Storage, Key Vault).
• Collaborate with cross-functional teams to gather requirements, define architecture, and deliver solutions.
• Write clean, testable, and maintainable code following best practices and participate in code reviews.
• Troubleshoot, debug, and optimize application performance.
• Follow Agile development practices for planning, testing, and delivery.

Required Skills and Experience:

• Strong hands-on experience with C#, .NET Core/.NET 6+, and object-oriented programming.
• Proficiency in front-end frameworks like React or Angular with TypeScript, HTML, and CSS.
• Experience working with SQL Server or other relational databases.
• Basic knowledge of Microsoft Azure services such as App Services, Functions, Storage, and Key Vault.
• Familiarity with REST APIs, version control systems (e.g., Git), and CI/CD pipelines.
• Good understanding of software development best practices (SOLID principles, unit testing).
• Strong problem-solving and communication skills.

Preferred Qualifications:

• Experience with Azure DevOps or similar tools for build and release pipelines.
• Exposure to containerized applications (e.g., Docker, Kubernetes).
• Knowledge of Agile methodologies (Scrum or Kanban).

Job Summary

We are looking for a Technical Lead with strong expertise in AWS, Node.js, and MongoDB to drive the design, development, and deployment of scalable applications. The ideal candidate will be responsible for leading a team of developers, defining best practices, and ensuring high-quality code delivery while working in an agile environment.

Key Responsibilities

• Lead the end-to-end development of web applications using Node.js, Angular, and MongoDB.
• Architect scalable, secure, and high-performance cloud-based applications on AWS.
• Provide technical guidance, code reviews, and mentorship to the development team.
• Optimize backend APIs and database queries for performance and scalability.
• Ensure best practices in coding, security, and DevOps for cloud deployment.
• Collaborate with cross-functional teams including UX/UI designers, product managers, and DevOps engineers.
• Implement CI/CD pipelines, automated testing, and infrastructure as code on AWS.
• Troubleshoot production issues and drive continuous improvement in system reliability.
• Stay updated with emerging technologies and advocate for relevant tech adoption.

Required Skills & Experience

• 4+ years of hands-on experience in software development.
• Strong proficiency in Node.js (Fastify/Express), Angular (latest versions), and MongoDB (Mongoose, Aggregations, Indexing).
• Cloud expertise with AWS services like EC2, S3, Lambda, API Gateway, ECS .., etc.
• Experience with Microservices Architecture.
• Strong knowledge of RESTful APIs, WebSockets, GraphQL, and authentication mechanisms (OAuth, JWT, SSO).
• Hands-on experience with performance tuning, caching strategies (Redis, CloudFront), and database optimisation.
• Strong problem-solving, leadership, and communication skills.

Good to Have

• Experience with AI/ML integration in applications.
• Knowledge of Serverless Architectures (AWS Lambda, Step Functions).
• Exposure to NoSQL databases like like Elasticsearch.

Why Join Us?

• Work on cutting-edge technologies in a fast-paced environment.
• Opportunity to lead a strong technical team and shape the product architecture.
• Competitive salary and benefits package.
• A culture that values innovation, ownership, and growth.

Looking for a 5+ years experienced Senior Full-stack Engineer (Backend Heavy) for a research-focused, product-based, US-based Startup.

AI Assistant for Research using state-of-the-art language models (AI Agent for Academic Research)

At SciSpace, we're using language models to automate and streamline research workflows from start to finish. And the best part? We're 

already making waves in the industry, with a whopping 5 million users 

on board as of November 2025! Our users love us too, with a 40% 

MOM retention rate and 10% of them using our app more than once 

a week! We're growing by more than 50% every month, all thanks to 

our awesome users spreading the word (see it yourself on Twitter). Andwith almost weekly feature launches since our inception, we're 

constantly pushing the boundaries of what's possible. Our team of 

experts in design, frontend, fullstack engineering, and machine learning

are already in place, but we're always on the lookout for new talent to help us take things to the next level. Our user base is super engaged and always eager to provide feedback, making Scispace one of the most advanced applications of language models out there.

We are looking for insatiably curious, always learning SDE 2 Fullstack Engineers. You could get a chance to work on the most important and challenging problems at scale.

Responsibilities:

* Work in managing products as part of SciSpace product suite.

* Partner with product owners in designing software that becomes part of researchers’ lives

* Model real-world scenarios into code that can build the SciSpace platform

* Test code that you write and continuously improve practices at SciSpace

* Arrive at technology decisions after extensive debates with other engineers

* Manage large projects from conceptualisation, all the way through deployments

* Evolve an ecosystem of tools and libraries that make it possible for SciSpace to provide reliable, always-on, performant services to our users

* Partner with other engineers in developing an architecture that is resilient to changes in product requirements and usage

* Work on the user-interface side and deliver a snappy, enjoyable experience to your users

Our Ideal Candidate would:

* Strong grasp of one high-level language like Python, JavaScript, etc.

* Strong grasp of front-end HTML/CSS, non-trivial browser-side JavaScript

* General awareness of SQL and database design concepts

* Solid understanding of testing fundamentals

* Strong communication skills

* Should have prior experience in managing and executing technology products.

Bonus:

* Prior experience working with high-volume, always-available web applications

* Experience in ElasticSearch.

* Experience in distributed systems.

* Experience working with a Start-up is a plus point.

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

1. Roles & Responsibilities -
   
   * We are looking for full-stack/back-end developers.
   * Our ideal candidate will be able to build applications from scratch and deliver
   a complete project i.e. understand requirements, design architecture, write reusable code that follows basic coding standards, test, deploy and support/follow-up features.
   * As a start-up, we are keen to work with people who are passionate about technology and who love the speed, chaos, and versatility of start-ups.
   
   Skills and Qualifications -
   
   * Team player with strong work ethic; Detail and deadline-oriented; Take ownership of tasks.
   * Good with version control systems like Git.
   * Professional understanding of CS fundamentals, data structures and algorithms.
   * Knowledge of Python is preferred.
   * Hands-on experience with front-end technologies - HTML5, CSS3, Bootstrap library & JavaScript/jQuery.
   * Knowledge of Angular 2/ReactJs is a plus.
   * Knowledge of Rest API is a plus.
   
   
   Perks -
   * Competetive compensation
   * MaBook
   * Friendly Leave Policy