Wissen Technology

Key Responsibilities:

• Design, develop, and maintain scalable backend applications using Java and Spring Boot.
• Build and consume RESTful APIs and ensure secure, reliable API integrations.
• Develop microservices-based architecture and deploy applications in cloud environments.
• Work with cloud platforms such as AWS/Azure/GCP for application deployment and management.
• Write clean, maintainable, and efficient code following best practices.
• Implement CI/CD pipelines and support DevOps practices.
• Optimize applications for performance, scalability, and reliability.
• Collaborate with cross-functional teams including frontend, QA, DevOps, and product teams.
• Participate in code reviews, technical design discussions, and architectural decisions.
• Troubleshoot production issues and provide timely resolution.

Required Skills & Qualifications:

• 5–10 years of hands-on experience in Java (Java 8 or above).
• Strong experience with Spring Boot, Spring MVC, Spring Data, Spring Security.
• Solid understanding of RESTful API design & development.
• Experience in microservices architecture.
• Hands-on experience with at least one cloud platform (AWS / Azure / GCP).
• Knowledge of containerization tools like Docker and orchestration tools like Kubernetes.
• Experience with relational and/or NoSQL databases (MySQL, PostgreSQL, MongoDB).
• Familiarity with CI/CD tools (Jenkins, GitHub Actions, etc.).
• Strong understanding of Git and version control practices.
• Good understanding of design patterns and object-oriented programming principles.

Company Name – Wissen Technology

Group of companies in India – Wissen Technology & Wissen Infotech

Work Location – Pune

While you may already know about Wissen and the company history, here is a quick rundown for you.

About Wissen Technology:

·        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. We help clients build world class products.

·        Our workforce has 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 has grown its revenues by 400% in these five years without any external funding or investments.

·        Globally present with offices 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.

·        Wissen Technology has been certified as a Great Place to Work®.

·        Wissen Technology has been voted as the Top 20 AI/ML vendor by CIO Insider in 2020.

·        Over the years, Wissen Group has successfully delivered $650 million worth of projects for more than 20 of the Fortune 500 companies.

·        We have served client across sectors like Banking, Telecom, Healthcare, Manufacturing, and Energy. They include likes of Morgan Stanley, Goldman Sachs, MSCI, StateStreet, Flipkart, Swiggy, Trafigura, GE to name a few.

Job Description:

Experience Required: 3–5years

Job Title: Application Development Engineer (Python – Backtesting & Index Platforms)

Role Overview

We are seeking a strong Python Application Engineer to help build a next-generation Index Backtesting and Rebalance Platform.

In this role, you will design and develop deterministic, scalable calculation engines that convert financial methodologies into production-grade software.

You will work on portfolio construction, rebalancing logic, and historical simulations while consuming reference and market data from Snowflake using python as your core processing tool.

Key Responsibilities

Engine Development: Design and implement modular, reusable Python components for index construction, rebalancing, and backtesting.

Large-Scale Simulation: Use Pandas, NumPy, and PySpark to run historical calculations across long time horizons and multiple index variants.

Workflow Integration: Integrate engines with orchestrators such as Airflow or Temporal using parameterized, config-driven execution.

Reference Data Consumption: Query and utilize pricing, security master, and corporate action data from Snowflake.

Quality & Reconciliation: Build automated test harnesses to validate outputs, compare against benchmarks, and guarantee reproducibility.

Performance Optimization: Improve runtime efficiency through vectorization, caching, and distributed computing patterns.

Cross-Team Collaboration: Partner with Business, Index Ops, and Platform teams to accelerate research-to-production onboarding.

Required Technical Capabilities

Python Expertise: Strong proficiency in Python application development with emphasis on clean architecture and maintainable design.

Data & Numerical Libraries: Deep experience with Pandas and NumPy; working knowledge of PySpark for distributed workloads.

Financial Computation: Ability to implement portfolio mathematics, weighting algorithms, and time-series transformations.

Config-Driven Systems: Experience building rule-based or metadata-driven processing frameworks.

Database Skills: Strong SQL and experience consuming structured data from Snowflake.

Testing Discipline: Expertise in unit testing, regression testing, and deterministic replay of calculations.

Orchestration Integration: Familiarity with Airflow, Temporal, or similar workflow engines.

Cloud Infrastructure: Solid understanding of AWS ecosystem services (S3, Lambda, IAM).

Technical Skills:

• Technical Skills:
• Python, PySpark, Pandas, NumPy, AWS (S3, Lambda), Apache Airflow, SQL, Financial Services Domain Knowledge, Strong Communication Skills.
• 
  

• 4–7 years of professional C++ experience in performance-critical systems
• Expert knowledge of modern C++ (C++11/14/17)
• Strong understanding of data structures, algorithms, and memory models
• Deep experience with multithreading, atomics, lock-free programming, and CPU cache behaviour
• Excellent knowledge of Linux internals and system-level programming
• Experience with low-level debugging and profiling (gdb, perf, valgrind, flamegraphs)
• Proficiency with CMake/Make and Git

2. Trading Systems Experience (Highly Preferred)

• Hands-on experience with order management systems (OMS) and execution engines
• Knowledge of exchange protocols: FIX, ITCH, OUCH, FAST
• Experience handling market data feeds (L1/L2, multicast, UDP)
• Understanding of latency measurement, clock synchronization, and time stamping
• Experience with network tuning (kernel bypass, socket tuning, CPU pinning)
• Familiarity with trading lifecycle, risk checks, and throttling mechanisms

3. Education

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related discipline

4. Soft Skills (Important for Trading Firms)

• Ability to work under extreme time and accuracy pressure
• Strong ownership of production systems
• Clear and direct communication with traders and quants
• Bias toward simple, fast, and reliable designs

5. Key Responsibilities

• Design, develop, and optimize ultra-low-latency C++ trading applications
• Build and maintain exchange connectivity and order execution systems
• Develop real-time market data pipelines with strict latency requirements
• Optimize systems at CPU, memory, and network levels
• Implement lock-free or low-lock concurrent designs
• Analyze latency using profiling tools and improve tail latency
• Ensure high availability, fault tolerance, and rapid recovery
• Work closely with Traders and Quant Researchers to implement strategies
• Participate in architecture and performance design reviews
• Review code, enforce best practices, and mentor junior engineers
• Support production systems and handle time-critical issues when needed

JOB DESCRIPTION

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. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. - 6-8 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 multi-threading 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.

Key Responsibilities

• Design, develop, test, and deploy scalable Java applications.

• Collaborate with cross-functional teams to define, design, and deliver new 

features.

• Solve complex technical problems with innovative, simple solutions.

• Write clean, efficient, and well-documented code.

• Participate in code reviews to maintain code quality.

• Continuously discover, evaluate, and implement new technologies to maximize 

development efficiency.

• Exhibit ownership and responsibility for assigned deliverables.

Qualifications and Required Skills

• 3 to 6 years of hands-on Java development experience.

• Strong experience in building products or applications from scratch (not just 

maintenance/support).

• Good understanding of object-oriented programming principles.

• Experience with frameworks like Spring, Spring Boot, Hibernate, etc.

• Strong knowledge of data structures, algorithms, and design patterns.

• Should have strong problem-solving abilities.

• Familiarity with RESTful APIs and microservices architecture is a plus.

• Solid understanding of database technologies (SQL, NoSQL).

• Exposure to cloud platforms (AWS, Azure, or GCP) will be an advantage.

• Strong debugging and troubleshooting skills

Data Engineer MS Data Engineer + Snowflake/databrics Required Skills: · 6 to 8 years of being a practitioner in data engineering or a related field. Should have experience in Snowflake or Databricks. Experience with data processing frameworks like Apache Spark or Hadoop. Experience working on Databricks. Familiarity with cloud platforms (AWS, Azure) and their data services. Experience with data warehousing concepts and technologies. Experience with message queues and streaming platforms (e.g., Kafka). Excellent communication and collaboration skills. Ability to work independently and as part of a geographically distributed team. 

Job Summary

We are seeking a Java + Big Data Engineer with hands-on experience in Big Data and Apache Spark. The ideal candidate should be strong in Core Java, comfortable working across backend and frontend layers, and capable of building scalable data-driven applications.

Must have:

• Overall 2+ years of experience in Big Data, Spark.
• Hands On experience on Big Data
• Expertise in Unix Commands and Bash scripting
• Must have experience on Spark With java(Strong experience in Core Java (multi-threading, collection Framework is must) and PL SQL.
• Ensure proper configuration management and change controls are implemented during code creation and deployment.
• Strong analytical skills demonstrated by the ability to research and to apply problem-solving skills to complex technical problems.

Key Responsibilities

• Design and develop full-stack applications using Java backend and modern frontend frameworks
• Build and maintain Spark-based data processing jobs using Java
• Develop and consume REST APIs for data-driven applications
• Optimize Spark jobs and Java services for performance and scalability
• Write efficient PL/SQL queries for data access and transformation
• Use Unix and Bash scripting for automation and operational tasks
• Ensure adherence to coding standards, version control, and deployment processes
• Collaborate with frontend, backend, and data engineering teams

NOTE: One technical round needs to be taken F2F from Pune office.

We are seeking a skilled Java Developer with hands-on experience in Java and Spark to build scalable data processing solutions. You'll contribute to high-performance data pipelines and analytics platforms in a dynamic Agile environment.

Key Responsibilities

• Design and develop Java applications integrated with Apache Spark for ETL processes, data transformations, and analytics.
• Build and optimize Spark jobs (Spark SQL, DataFrames, Streaming) for large-scale data processing.
• Collaborate with data engineers and analysts to implement robust data workflows.
• Write clean, maintainable Java code following best practices (Spring Boot, Microservices preferred).
• Perform code reviews, unit testing, and contribute to CI/CD pipelines.
• Troubleshoot and optimize Spark performance for production workloads.
• Document technical solutions and mentor junior developers.

Required Skills & Qualifications

• 4-7 years of hands-on Java development experience.
• Strong expertise in Apache Spark (Spark Core, Spark SQL, PySpark basics).
• Proficiency in Java 8/11+ with multithreading and collections frameworks.
• Experience with data processing (ETL, data pipelines, big data).
• Familiarity with build tools (Maven/Gradle) and version control (Git).
• Strong problem-solving skills and Bangalore location availability.
• Excellent communication skills for cross-team collaboration.

Good to Have

• Experience with Snowflake for cloud data warehousing.
• Knowledge of DBT (Data Build Tool) for analytics engineering.
• Python scripting for data manipulation and automation.
• Exposure to AWS/GCP/Azure cloud platforms.
• Familiarity with Kafka, Airflow, or containerization (Docker/Kubernetes).

JOB DESCRIPTION

Experience: 3-8 years

Location- Mumbai

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. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. - 3-8 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 multi-threading 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.

JOB DESCRIPTION:

Location: Pune, Mumbai

Mode of Work : 3 days from Office

DSA(Collections, Hash maps, trees, Linkedlist and Arrays, etc), Core Oops concepts(Multithreading, Multi Processing, Polymorphism, Inheritance etc) Annotations in Spring and Spring boot, Java 8 Vital features, database Optimization, Microsevices and Rest API

• Design, develop, and maintain low-latency, high-performance enterprise applications using Core Java (Java 5.0 and above).
• Implement and integrate APIs using Spring Framework and Apache CXF.
• Build microservices-based architecture for scalable and distributed systems.
• Collaborate with cross-functional teams for high/low-level design, development, and deployment of software solutions.
• Optimize performance through efficient multithreading, memory management, and algorithm design.
• Ensure best coding practices, conduct code reviews, and perform unit/integration testing.
• Work with RDBMS (preferably Sybase) for backend data integration.
• Analyze complex business problems and deliver innovative technology solutions in the financial/trading domain.
• Work in Unix/Linux environments for deployment and troubleshooting.