
Location: Bangalore
Experience: 5 to 10 years
Joiners: Immediate / Notice Period < 30 days
Company: Wissen Technology
š Job Overview:
We are looking for a passionate and skilled Fullstack Developer with strong backend expertise in Java and advanced frontend proficiency in React, JavaScript, and TypeScript. The ideal candidate will have a deep understanding of core computer science concepts like Multithreading, Collections, and Immutability, and should be highly proficient in building scalable, maintainable systems.
š ļø Key Responsibilities:
- Design and develop robust, scalable backend systems using Java (preferably Java 8 or higher).
- Build interactive, high-performance UIs using React.js, JavaScript, and TypeScript.
- Implement complex business logic with clean and maintainable code.
- Write efficient, thread-safe code utilizing Multithreading, HashMaps, HashSets, and Collections.
- Work with iterators and immutability principles to build reliable data flows.
- Collaborate with product managers, designers, and QA teams in an Agile environment.
- Troubleshoot and debug production issues as needed.
ā Must-Have Skills:
- Strong programming experience in Core Java, Multithreading, and Java Collections Framework.
- Solid knowledge of React.js, JavaScript (ES6+), and TypeScript.
- Hands-on with HashMap, HashSet, Iterators, and Immutable Data Structures.
- Experience working with REST APIs, Spring Boot, and microservice architectures.
- Familiarity with version control systems like Git and CI/CD pipelines.
- Strong problem-solving and analytical skills.
š¼ Good to Have:
- Exposure to cloud platforms (AWS, GCP, Azure).
- Experience with state management tools like Redux or Context API.
- Knowledge of performance optimization and memory management in JavaScript.

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer 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.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to WorkĀ®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
Connect with the team
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Role Overview
We are looking for a Senior Full Stack Developer to build and scale our fintech platform. You will own the entire lifecycle of our financial products, from designing high-performance relational schemas in PostgreSQL to building interactive dashboards in React.
Key Responsibilities
⢠Full Stack Development: Build and maintain end-to-end features using the PERN stack
(PostgreSQL, Express.js, React, Node.js).
⢠Database Optimization: Design complex relational models and optimize SQL queries to
handle high-volume financial data and audit trails.
⢠Security & Compliance: Implement rigorous security measures (e.g., JWT, OAuth, data
encryption) and ensure the platform adheres to fintech standards like PCI-DSS.
⢠API Architecture: Develop robust RESTful APIs to integrate with third-party banking APIs,
payment processors (Stripe/Plaid), and KYC providers.
Technical Requirements
⢠Front-end: Advanced proficiency in React.js (Hooks, Context API, Redux or TanStack Query)
and modern CSS (Tailwind/Styled Components).
⢠Back-end: Expert-level Node.js and Express.js experience, with a focus on asynchronous
programming and secure API design.
⢠Database: Deep knowledge of PostgreSQL (complex joins, indexing, triggers, and
migrations).
Additional skills
⢠Understanding of Event-Driven Architecture (using AWS SQS/SNS or Kafka).
⢠Familiarity with SOC2 or ISO 27001 compliance frameworks.
⢠Cloud (AWS): Proven experience with:
- RDS/Aurora for managed databases.
- IAM for secure access management.
- AWS Lambda & API Gateway for serverless architecture.
- CloudWatch for monitoring and alerting.
⢠Tools: Git, Docker, and experience with CI/CD workflows.
About US
RJ Fintech Solutions Pvt. Ltd. is a high-growth fintech startup on a mission to automate business financial operations. In a world where financial systems are often slow and opaque, we are building the "missing link"āa secure, transparent, and lightning-fast platform that puts banking and compliance first for various corporates.
We are not just another financial app; we are an engineering-first company. We believe that elegant code and robust architecture are the foundations of trust. By leveraging the PERN stack and AWS cloud-native infrastructure, we are replacing legacy complexity with modern, scalable solutions.
Why Work With Us?
1. Build the Foundation, Not Just Features
You won't be a small cog in a massive machine. As an early member of our engineering team, you will help define our technical architecture, choose our libraries, and set the coding standards for everyone who follows. Your fingerprints will be on the core DNA of our product.
2. Solve Problems That Matter
Fintech is one of the few industries where code has a direct, measurable impact on people's lives.
Whether we are [e.g., simplifying cross-border payments, democratizing investment, or building the next generation of credit], you will be solving high-stakes challenges around security, trust, and financial inclusion.
Responsibilities
- Design and develop REST-based web services utilizing Java micro services web frameworks (Spring Boot)
- Apply design principles and patterns in creating enterprise level solutions, as needed
- Perform web services tuning and performance testing
- Implement unit tests as needed
- Support front-end developers in leveraging web services
- Automate/script common developer tasks, continually optimize personal and team workflows
- Infrastructure setup and configuration
- Engage in code review and feedback process
- Take a feature from inception to completion independently across the stack
- Collaborate with teammates on proposed UX/UI and provide feedback as needed
- Participate in and support the entire SDLC processes
Requirements
- Spring Boot, Spring Security, Spring JPA & Hibernate
- Relational data modelling concepts and experience in PostgreSQL, MySQL, or similar
- Adopted opinionated RESTful web services design patterns
- Microservices-based application architecture
- Application containerization technologies, including Docker, Kubernetes, and cloud-vendor implementations (AWS, Azure, other)
- Other modern technologies relevant to the technology stack defined here
- Javascript ES6 or later
- React
- Git
- Work with development teams and product managers to create software solutions.
- Design client-side and server-side architecture.
- Build the front-end of applications.
- Develop and manage well-functioning databases and applications.
- Write effective APIs.
- Test software to ensure responsiveness and efficiency.
- Troubleshoot, debug and upgrade software.
- Create security and data protection settings.
- Build features and applications with a mobile responsive design.
- Write technical documentation.
- Work with data scientists and analysts to improve the software.
Qualifications:
Degree in Computer Science, Software Engineering or relevant field.
Experience with Java, Spring, and Restful API's.
Experience with Database development (MySQL, Postgres, etc).
Proven experience as a Full Stack Developer or similar role. Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, jQuery).
Knowledge of multiple back-end languages (e.g. Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js).
Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache), and UI/UX design.
Experience with AWS or other cloud environments
Technical Skills
Ā
Front-end:
Mandatory Technical Skills: ReactJS, ES6, Context API, GraphQL, Redux, Payment Gateway
Not Mandatory skills: Redux saga, Gatsby, Git Pipeline, Deployment on Cloud AWS/Azure/Google
Ā
Back-end:
Mandatory Technical Skills: NodeJS, ES6, Express, Apollo Server, Send Grid Email, Twilio SMS, Payment Gateway,
Exception Management, Error Loggin, API Developement, API Security, PostGreSQL/MSSQL/MySQL, MongoDB/CouchDB
Not Mandatory: Docker Deployment, Git Pipeline, Auto Deployment, AWS/Azure/Google, NestJS
Ā
Job roles and responsibilities
- Design and implement key components of our technical infrastructure, including services supporting payments, lottery results, user management, and game mechanics
- Design and implement user-facing features for Web, iOS, and Android applications
- Take ownership of mission-critical functionality that is consumed by our mobile, web, and internal applications
- Work as a team with your peers, collaborating on architecture, mentoring teammates, and pushing our entire stack forward
- Stay up to date on the latest innovations in our industry and in our tech stack
- Integrating with and managing third-party APIs as well as designing and developing APIs for partners and peers
- Work with the product team to keep the roadmap realistic, on track, and groomed
- Capable of writing technical specs and documenting work
- Management of Jira, Git, AWS, Heroku, and other platform systems
Ā
Competencies and Skills Required
- Requires excellent analytical, problem-solving, and good communications skills
- Must be able to work effectively with business stakeholders
- Able to understand requirements and implement complete business solutions for our industry
- Must possess strong customer service skills
- Excellent written and verbal communication
- Must have excellent interpersonal skills
Ionic/React Native/ AngularJS / Javascript, Cordova, HTML5, CSS
Requirements
⢠Good Knowledge of Hybrid app development and Enterpise Business applications
⢠Expertise in using Mobile App frameworks
⢠Experience in using REST APIās, Webservice and JSON
⢠Knowledge of sqlite and web storage
⢠Good in designing
⢠Good communication Skill
⢠Ability to work in a team
⢠Familiarity with Native Android is a plus
Description
Title
Senior Full Stack Software Developer
Job Function
Full Stack Software Developer - Laravel
Company industry
Publishing, E-Learning, Education
Ā
Role overview
We are currently developing a centralised, job scheduling solution in Laravel framework, utilising queue management through Horizon and Laravelās job runners. Experience of both technologies within Laravel are a must as this will enable you to further enhance the capabilities of the solution.
Whilst this is a technical role, we would still expect you to be able to communicate clearly and effectively at all levels including with key stakeholders. Packt prides itself on being a global, remote company and its successes are heavily reliant upon communication skills and as such would expect you to uphold this requirement too.
Ā
About Packt
Packt is a leading publisher of technical learning content with the ability to publish books on new and emerging tech faster than any other publisher in the world. We believe that software has a deep impact on the world, and that software runs on knowledge. Our mission is to increase the shared value of deep tech knowledge. We are tech content engineers, and we work with some of the most interesting technical minds and ground-breaking creators on the planet. For more details, seeĀ http://www.packt.com/" target="_blank">www.packt.com
Ā
About the Team
You will become a pivotal member of the Platforms team who are responsible for developing and maintaining internal and external solutions to assist in the exposure of data across the Packt domain.
We are a delivery-focused team who enjoy actively developing our own skills through the use of newer technologies and methodologies from front-end to back-end.
The team is one that is always evolving and delivering but equally we like to enjoy what we do as well, laughter, humor and a desire to achieve will serve you well as part of the Platforms team for sure.
Ā
What youāll do?
We expect you to have at least 6 years full-time experience in building software solutions in PHP with demonstratable experience of utilizing the Laravel framework. who can develop complex solutions around business requirements and driving innovation forward? We would expect you to drive the adoption of Laravel across the squad and business and to help peers to understand the benefits and wider eco-system of Laravel.
Ā
Who you are?
To provide a summary, we are looking for someone with the following skills, although not exhaustive:
* An expert level knowledge of PHP around OOP principles and understands the need for design patterns and code structure
* Not only has utilized Laravel but has worked on production Laravel systems. You will be aware of the latest trends within the Laravel Eco-system and the tool offerings it provides
* Some experience of JavaScript frameworks such as Angular or React is a must, given your exposure to Laravel this would usually develop naturally.
* Any knowledge of SharePoint, it is APIās and the way it works would be highly beneficial as we have recently adopted SharePoint in order to facilitate several business processes
* You will understand and be able to demonstrate your understanding of Docker and Docker-Compose. Given your experience you should be able to discuss potential Docker architectures to help support our business systems and assist with implementation.
* You will be a great communicator, being able to converse with your peers and stakeholders in both technical & non-technical situations.
* A deep understanding of the use of a git-based workflow system and git-flow
* Experience on below skills is mandatory:
PHP, Laravel (4+ years), Horizon, MySQL, HTML, CSS, (Angular or React Js), REST API
* Experience on Docker, Tailwind CSS, SuiteCRM (any) is an advantage
Do not worry, we are not expecting you to be an expert in all the above skills but having exposure to them would certainly assist in your application.
Ā
Why work at Packt?
We recognize how important our people are and acknowledge and support the things that are important to them. We focus on the full employee experience. We aim to create a positive working environment that supports personal and collective development ā where our people can not only grow their skill sets, continuously challenge themselves, and develop their careers, but also work together as a team and with our customers.
We try to achieve this by:
- Ensuring a positive working environment for all employees, supportive of flexible and remote work.
- Supporting individual development through growth opportunities and internal mobility.
- Encouraging social collaboration within teams and communities and knowledge-sharing.
- Fostering a culture that supports a healthy work-life balance.
We seek to achieve this by:
- Providing a broad range of benefits and initiatives.
- Advocating a healthy lifestyle where wellbeing is seen as an essential responsibility.
- Celebrating success stories and encouraging peer-to-peer recognition.
- Fostering a culture of self-development.
- Providing a work environment where the best idea wins, and challenge is encouraged.
Benefits
You will also have access to a range of flexible benefits that are designed to help you make the most of your time with us.
- Bonus scheme
- 21 daysā holiday (plus bank holidays)
- Pension contribution
- Insurance
- Flexible hours: choose how, when and where you work.
Employment type
Full-time
Seniority level
Senior level

- Design the architecture and their solutions
- Define user stories and implement them using agile methodology
- Engage and manage a team of software engineers; including task planning and code reviews
- Have technical ownership of the product
Must have:
- Fullstack experience (React, Node JS, VU, Python)
- Expert in web technology (SaaS)
- Know-how of cloud technology
- Broad experience with multi-platform development tools and toolkits
- Experience in release engineering and configuration management
- Comfort with both client-side and server-side development
- Passion for agile
- Knowledge of CICD pipeline
Bonus if you:
- Have experience working in the healthcare industry
- Are enthusiastic about all things brain science and/or mental well-being
- We are a company that highly values the ability to communicate well. We all take turns at the blog roster, so writing experience and/or enthusiasm is appreciated
- Our core values encourage empathy and innovation, you are gold if you share these
Ā
- Bachelor's degree in Computer Science (or related field)
- 5+ years of relevant work experience
- Expertise in React.js, React-native, Python, Android & Database
- Experience with Agile or Scrum software development methodologies
- Ability to multi-task, organize, and prioritize work









