Data Scientist

Java Developer – Job Description

About the Role

Wissen Technology is now hiring for a Java Developer - Mumbai with hands-on experience in Core Java, algorithms, data structures, multithreading, and SQL.

We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. This is a brilliant opportunity to become a part of a highly motivated and expert team that has made a mark as a high-end technical consulting organization.

Required Skills

• Experience: 4 to 7 years
• Experience in Core Java and Spring Boot
• Extensive experience in developing enterprise-scale applications and systems
• Should possess good architectural knowledge and be aware of enterprise application design patterns
• Should have the ability to analyze, design, develop, and test complex, low-latency client-facing applications
• Good development experience with RDBMS
• Good knowledge of multithreading and high-performance server-side development
• Basic working knowledge of Unix/Linux
• Excellent problem-solving and coding skills
• Strong interpersonal, communication, and analytical skills
• Should have the ability to express their design ideas and thoughts

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.

Review Criteria

• Strong Data Scientist/Machine Learnings/ AI Engineer Profile
• 2+ years of hands-on experience as a Data Scientist or Machine Learning Engineer building ML models
• Strong expertise in Python with the ability to implement classical ML algorithms including linear regression, logistic regression, decision trees, gradient boosting, etc.
• Hands-on experience in minimum 2+ usecaseds out of recommendation systems, image data, fraud/risk detection, price modelling, propensity models
• Strong exposure to NLP, including text generation or text classification (Text G), embeddings, similarity models, user profiling, and feature extraction from unstructured text
• Experience productionizing ML models through APIs/CI/CD/Docker and working on AWS or GCP environments
• Preferred (Company) – Must be from product companies

Job Specific Criteria

• CV Attachment is mandatory
• What's your current company?
• Which use cases you have hands on experience?
• Are you ok for Mumbai location (if candidate is from outside Mumbai)?
• Reason for change (if candidate has been in current company for less than 1 year)?
• Reason for hike (if greater than 25%)?

Role & Responsibilities

• Partner with Product to spot high-leverage ML opportunities tied to business metrics.
• Wrangle large structured and unstructured datasets; build reliable features and data contracts.
• Build and ship models to:
• Enhance customer experiences and personalization
• Boost revenue via pricing/discount optimization
• Power user-to-user discovery and ranking (matchmaking at scale)
• Detect and block fraud/risk in real time
• Score conversion/churn/acceptance propensity for targeted actions
• Collaborate with Engineering to productionize via APIs/CI/CD/Docker on AWS.
• Design and run A/B tests with guardrails.
• Build monitoring for model/data drift and business KPIs

Ideal Candidate

• 2–5 years of DS/ML experience in consumer internet / B2C products, with 7–8 models shipped to production end-to-end.
• Proven, hands-on success in at least two (preferably 3–4) of the following:
• Recommender systems (retrieval + ranking, NDCG/Recall, online lift; bandits a plus)
• Fraud/risk detection (severe class imbalance, PR-AUC)
• Pricing models (elasticity, demand curves, margin vs. win-rate trade-offs, guardrails/simulation)
• Propensity models (payment/churn)
• Programming: strong Python and SQL; solid git, Docker, CI/CD.
• Cloud and data: experience with AWS or GCP; familiarity with warehouses/dashboards (Redshift/BigQuery, Looker/Tableau).
• ML breadth: recommender systems, NLP or user profiling, anomaly detection.
• Communication: clear storytelling with data; can align stakeholders and drive decisions.

Strong Technical Recruiter profile

Mandatory (Experience 1): Must have 4+ years of experience in end to end recruitment (sourcing, screening, interviewing, offer negotiation, joining etc)

Mandatory (Experience 2): Must have 2+ years of experience in tech recruitment across different tech roles

Mandatory ( Tech Skill 1): Strong grasp of technical concepts and ability to evaluate candidate fit for different technical roles

Mandatory (Tech Skills 2): Must have experience of analyzing data to improve hiring funnel, take data-driven hiring decisions

Mandatory (Tech Skills 3): Must be proficient in advanced sourcing techniques such as Boolean search, social media recruiting, and referral programs

Mandatory (Communication): Excellent verbal and written communication skills — should be articulate, confident, and well-spoken in interactions

Mandatory (Company): Product companies

Mandatory (Note): This is an IC role

Role: Senior Backend Developer

Exp: 4 - 7 Years

CTC: up to 22 LPA

Key Responsibilities

• Design, develop, and maintain scalable applications using Java (Spring Boot) and Python (Flask).
• Build RESTful APIs and microservices following best practices.
• Implement event-driven architecture leveraging NATS messaging server.
• Deploy, manage, and optimize applications in Kubernetes and containerized environments.
• Develop and manage CI/CD pipelines, ensuring smooth deployment and delivery.
• Collaborate with cross-functional teams to deliver high-quality solutions.
• Write clean, maintainable, and well-documented code.
• Participate in code reviews and contribute to architectural decisions.
• Troubleshoot, debug, and optimize application performance.

High-quality source code to program complete applications within deadlines

- Strong integration and architectural knowledge with Agile methodology

- Working closely with other developers, UX designers, business, Testing Team and systems analysts

- Demonstrated experience in leading medium- to large-scale projects to successful completion and implementation

- Involvement in Team management activities with their own work (like code review, team guidance/mentoring, status reporting)

- Build API’s that integrate with all majors ERP, CRM, and other systems

- Be the first point of escalation for technical issues and resolve issues working with stakeholders

- Ability to plan, organize, prioritize and deliver multiple projects simultaneously

• Working with the conference production team to develop an understanding of the event programme.
• Researching attendees and generating sales leads.
• Cold calling and selling to a list of prospective event attendees.
• Engaging with clients on the phone and developing lasting relationships.
• Daily management and maintenance of sales records, ensuring they are kept up to date with attendees and details.
• Working with the team to convert inbound sales enquiries into leads.
• Achieving monthly and overall revenue targets.
• Making a high number of calls to meet daily KPIs, to be set by management.
• Supporting delegates through the registration process.
• Experience in International voice process in sales will be an added advantage.

Responsibilities: -

• Designing of look-books and visually stunning collateral
• Understanding client’s needs
• Create engaging and on-brand graphics for various social media platforms

Requirements

• 1+ year of work experience
• Hands-on experience with layout design
• Degree in Design, Fine arts or Related field
• Work from office in Mumbai