- 4+ years exp with solid backend/engineering experience.
- Knowledge of data structures and an eye for architecture.
- Solid CS fundamentals, fluent in multi-threaded and asynchronous programming, a strong inclination for architecting at scale.
- Excellent technical design, problem-solving, debugging, and communication skills.
- Rapid prototyping worked on distributed systems at scale.
- Basic knowledge of SQL as well as NoSQL databases.
- Proficient in Golang, it's design, and concurrency patterns.

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Job Title : Python Developer – API Integration & AWS Deployment
Experience : 5+ Years
Location : Bangalore
Work Mode : Onsite
Job Overview :
We are seeking an experienced Python Developer with strong expertise in API development and AWS cloud deployment.
The ideal candidate will be responsible for building scalable RESTful APIs, automating power system simulations using PSS®E (psspy), and deploying automation workflows securely and efficiently on AWS.
Mandatory Skills : Python, FastAPI/Flask, PSS®E (psspy), RESTful API Development, AWS (EC2, Lambda, S3, EFS, API Gateway), AWS IAM, CloudWatch.
Key Responsibilities :
Python Development & API Integration :
- Design, build, and maintain RESTful APIs using FastAPI or Flask to interface with PSS®E.
- Automate simulations and workflows using the PSS®E Python API (psspy).
- Implement robust bulk case processing, result extraction, and automated reporting systems.
AWS Cloud Deployment :
- Deploy APIs and automation pipelines using AWS services such as EC2, Lambda, S3, EFS, and API Gateway.
- Apply cloud-native best practices to ensure reliability, scalability, and cost efficiency.
- Manage secure access control using AWS IAM, API keys, and implement monitoring using CloudWatch.
Required Skills :
- 5+ Years of professional experience in Python development.
- Hands-on experience with RESTful API development (FastAPI/Flask).
- Solid experience working with PSS®E and its psspy Python API.
- Strong understanding of AWS services, deployment, and best practices.
- Proficiency in automation, scripting, and report generation.
- Knowledge of cloud security and monitoring tools like IAM and CloudWatch.
Good to Have :
- Experience in power system simulation and electrical engineering concepts.
- Familiarity with CI/CD tools for AWS deployments.
JOB DESCRIPTION:
- 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.
Required Skills & Experience:
- 4– 12 years of strong hands-on experience in Core Java.
- Deep understanding of Object-Oriented Programming (OOP), data structures, algorithms, and design patterns.
- Proven experience with Spring, CXF, and REST/SOAP web services.
- Solid understanding of microservices architecture and distributed systems.
- Experience working with Sybase or other relational databases.
- Expertise in multithreading, concurrency, and high-throughput server-side development.
- Exposure to capital markets, sales & trading platforms, or similar financial services applications.
- Good working knowledge of Unix/Linux environments.
- Experience in solution architecture and design documentation is a strong plus.
- Strong problem-solving skills, analytical thinking, and a proactive attitude.
- Excellent communication and interpersonal skills to work effectively with global teams.
Preferred Qualifications:
- Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
- Previous experience in investment banking, capital markets, or financial technology domains.
Why Join Wissen Technology?
- Be a part of a high-growth organization that has expanded 400% in the last five years.
- Work alongside leadership and engineers from IITs, IIMs, MIT, Wharton, and other top institutions.
- Engage with Fortune 500 clients and deliver high-impact projects.
- Certified as a Great Place to Work®.
- Recognized as a Top 20 AI/ML Vendor by CIO Insider (2020).
- Work on next-gen technologies: AI/ML, Big Data, Cloud, DevOps, RPA, and more.
- Global presence across US, India, UK, Australia, Mexico, and Canada.
Website : www.wissen.com
Design, develop, and maintain backend services using Java
Build scalable RESTful APIs and microservices
Work with Spring / Spring Boot frameworks
Implement business logic, data access layers, and integrations
Optimize application performance, scalability, and security
Write clean, testable, and maintainable code
Perform unit and integration testing
Participate in code reviews and technical discussions
Collaborate with frontend, DevOps, and QA teams
Troubleshoot and resolve produc
Strong Senior Backend Engineer profiles
Mandatory (Experience 1) – Must have 5+ years of hands-on Backend Engineering experience building scalable, production-grade systems
Mandatory (Experience 2) – Must have strong backend development experience using one or more frameworks (FastAPI / Django (Python), Spring (Java), Express (Node.js).
Mandatory (Experience 3) – Must have deep understanding of relevant libraries, tools, and best practices within the chosen backend framework
Mandatory (Experience 4) – Must have strong experience with databases, including SQL and NoSQL, along with efficient data modeling and performance optimization
Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs, services, and backend systems, including system design and clean code practices
Mandatory (Domain) – Experience with financial systems, billing platforms, or fintech applications is highly preferred (fintech background is a strong plus)
Mandatory (Company) – Must have worked in product companies / startups, preferably Series A to Series D
Mandatory (Education) – Candidates from top engineering institutes (IITs, BITS, or equivalent Tier-1 colleges) are preferred
JOB TITLE/HEADLINE: Backend Developer
EMPLOYMENT TYPE: Full time, permanent.
REPORTING TO: Ajit Kumar
LOCATION: Andheri, Mumbai
Backend Developer
Position Overview:
As a Backend Developer at FatakPay, you will play a crucial role in designing, implementing, testing, and maintaining the backend systems that power our applications. You will collaborate with cross-functional teams to develop scalable and efficient server-side applications, ensuring high performance and responsiveness.
Responsibilities:
Design, develop, and maintain robust and scalable backend systems.
Collaborate with front-end developers, designers, and other stakeholders to integrate user-facing elements with server-side logic.
Implement and maintain data storage solutions, ensuring optimal performance and data integrity.
Collaborate with DevOps to deploy and manage applications in a cloud environment.
Write clean, efficient, and maintainable code, following best practices and coding standards.
Conduct code reviews and provide constructive feedback to team members. Identify and address performance bottlenecks, security issues, and other technical challenges.
Stay updated on emerging trends and technologies in backend development.
Qualifications:
Bachelor's degree in Computer Science, Software Engineering, or a related field. Proven experience as a Backend Developer or similar role.
Strong proficiency in server-side programming languages such as Java, Python, or Node.js.
Experience with database systems such as MySQL, PostgreSQL, or MongoDB. Familiarity with RESTful API design and integration.
Knowledge of cloud platforms like AWS, Azure, or Google Cloud. Understanding of code versioning tools, such as Git.
Excellent problem-solving and communication skills. Ability to work collaboratively in a team environment.
ABOUT THE COMPANY:
FatakPay Digital Private Ltd (FatakPay) is a digital-only lending platform that provides virtual credit facilities. The solution provides a 100% digital and paperless quick, transparent and secure way to transact in multilingual format with a ‘scan now, pay later’ facility and easy repayment options.
We're a company that strongly believes in teamwork, design, creativity and tech. We love to build the best possible Financial Tech products that make the world a better place.
WHAT HAPPENS NEXT?
If selected for an interview, you will hear directly from someone from the HR department, usually within a week of the closing date.
Skills:
- Proficient in Go programming language with experience in building high-performance, scalable applications
- Experience with Java development a plus
- Familiarity with Git version control systems (e.g., GitHub, GitLab, BitBucket, SVN)
- Solid understanding of RESTful web services APIs
- Experience with CI/CD tools like Jenkins
- Experience with NoSQL databases
- Experience working with PostgreSQL databases
Responsibilities:
- Design, develop, and maintain robust and efficient Go code
- Collaborate with cross-functional teams to design, implement, and deploy new features
- Participate in code reviews and ensure high code quality
- Troubleshoot and debug complex technical problems
- Stay up-to-date with the latest advancements in Go and related technologies
lives of API developers and consumers easier. If you love thinking big and delving deep and
enjoy envisioning truly elegant solutions, this role is definitely for you.
What you will be Doing
- You will abstract away complex data interactions with easy-to-use APIs that will power several
mobile and web applications.
- You will also own, scale, and maintain the computational and storage infrastructure for the
various micro-services and long-running jobs, designed and implemented by you and the team.
- We will look to you to make key decisions on the technology stack, architecture, networking,
and security. We love working with bleeding-edge technology, especially if it improves the
malleability, and simplicity of our deliverables.
What you need
- The ideal Backend Engineers are polyglots who are fluent in HTTP and core CS concepts such
as algorithms, data structures, and programming paradigms, and always pick the right tools for
the right job.
- They have a keen eye for common security vulnerabilities and how to act on them (example:
DDOS attacks, SQL Injection etc.).
- They understand what it takes to work in a startup environment and know when to trade
performance for simplicity.
- They fail fast, learn faster, and execute in time.
- Strong communication skills, get-things-done attitude, and empathy
- Strong sense of ownership, drive and obsessive attention to detail.
- Comfortable with iterative development practices and code reviews
- Previous experience as part of a product-oriented team is a plus
Technical Skillsets:
NodeJS + Javascript, GoLang, Typescript + Nodejs, Clojure/Haskell/F#/Scala
(languages/environments)
Koa, Express, Play (frameworks)
Asynchronous Programming Frameworks (Akka, Nodejs, Tornado)
MongoDB, postgres, Bigtable, Dynamo (databases)
Apache Kafka, NATS, RabbitMQ, ZeroMQ (queues)
FunctionalProgramming, FRP (functional reactive)
microservices, multi-tenant, distributed-systems, distributed-computing, event-sourcing
Good to have Skillsets:
Clojure/Haskell/F#/Scala
Apache Kafka, NATS
FunctionalProgramming, FRP (functional reactive)
event-sourcing
Koa
Why you should consider this role seriously?
- We have an audacious vision of helping companies fight counterfeiting and managing their
supply chain more efficiently
- We have built a product and solved problems for some of the largest brands in the country and
tested platform at scale (With our tags present in over 50 Million products already). We have
plans to grow 10x in the next 1 year
- Ownership of key problems. Fast-paced environment
- We are a well-balanced team of experienced entrepreneurs and are backed by top investors
across India and the Silicon Valley (Venture Highway, Startup Buddy etc.)
- Competitive market salary
- Opportunity to work directly with the CEO, COO, CTO of the company
- A chance to interact with top-notch executives from multiple industries
- Open vacation policy (and we really mean it!)
- Open Pantry
- As a team, we love to travel :). An off-site every quarter
Roles and Responsibilities
• Code, develop, design and architect features related to the existing application. We
expect you to own modules end to end and take pride in the work products you
ship.
• Lead from the front, when it comes to delivering high quality work products. Serve
as a mentor to the team members
• Create and define performance metrics. Ideate, innovate and hack through the
existing systems to improve performance.
• Perform code reviews, set coding practices and guidelines within the team.
• Make sense of the product specs, be nimble in getting the issues resolved. Be a
thought leader.
Critical Functional Skills:
• Solid understanding and knowledge of Java/C/C++. You should understand the
concepts of multithreading, I/O, messaging, instrumentation etc and their
implementation in Java/Any other Object-Oriented Language.
• Proficiency in the implementation of algorithms and the use of advanced data
structures to solve problems in computing. A solid foundation in the principles of
computer science is desired.
• Ability to write clean, modular, and loosely coupled code by the use of design
patterns.
• He/She should be able to break down and architect complex software systems. For
example- Build
• Cars Availability Engine for Ola.
• Strong decision-making ability
• Deep expertise in at least one programming language & tech stack.
• Substantial experience in building complex and scalable solutions.
• Strong object-oriented design skills, ability to apply design patterns, and an uncanny
ability to design intuitive module and class-level interfaces
• The ability to do deep problem solving and build elegant, maintainable solutions to
complex problems.
• Experience leading multi-engineer projects and mentoring junior engineers
• Experience with full life cycle development in any programming language on a Linux
platform
• Comprehensive operational experience including, optimizations, deployments and
tuning servers like apache/mysql/tomcat/solr
• Prior experience in working with Agile software methodologies (XP, Scrum), TDD,
and Continuous Integration(CI/CD) a plus.
• Experience in building data-driven web application design and development is a plus
• Expert level experience in building a scalable, large and complex business
application.
Experience Required:
• Typically with an experience of 5+ years of development experience in a product
firm.
• Must have lead, designed, architected and delivered at least 1 project in his previous
assignments independently.
Minimum Qualifications Required:
• Btech/MS from a reputed Institute
• Deep expertise with any or combination programming languages: Java, C++, C#,
Ruby, Scala,
• Go any object-oriented high-level proprietary or open-source language with strong
programming constructs. We are not skill-specific but go by strength in
competencies
• Machine coding
• Single machine in-memory program
• Need a working code with functionality
• Readable and well-designed code with right abstractions, separation of concerns,
• right design patterns
• Performant code with concurrency and efficient data structures
• Write test cases covering the happy path and edge cases
• Problem Solving
• Choose the right combination of data structures to solve the problem
• Identify most edge cases for the problem
• Identify opportunities of parallelism: utilizes multi-core solutions where applicable
• Design & Architecture
• Distributed systems design and system interaction
• Identify API signatures
• LLD with class design
• Solve for performance & availability
Your Day-to-Day Tasks Include:
Works in requirements like Engineering, Design, Development, and Deployment. All the tasks involves working with Java, SQL Server and Couchbase.
Build and monitor data pipelines that serve 100+ websites, 150M+ unique impressions daily. Write code that can handle 4x more scale than the given requirement.
Maintain uptime of multiple distributed web applications.
Build data pipelines to pull data from upstream partners like Google.
You Should Have:
Minimum 3 years of experience with Java.
Minimum 2 year of experience with any SQL database (MySql, MSSql, Oracle, DB2, Sybase). Minimum 3 years of experience with web development.
Experience with any NoSql database (MongoDb, Couchbase, CouchDb, DynamoDb). Experience of designing/implementing/maintaining scalable systems.
Experience with any cloud platform (AWS/Azure/GCP).
Good To Have:
Experience with BI and data reporting.
Experience with Elastic search.
Understanding of data warehousing.
Experience in Node.js.
Company Introduction –
- Information Security & Data Analytics Series A funded company.
- Working in cutting edge technologies - Using AI for predictive intelligence and Facial Biometrics.
- Among Top 5 Cyber excellence companies globally (Holger Schulze awards)
- Bronze award for best startup of the year (Indian Express IT awards), only cyber Security Company in top 3.
- More than 100+ clients in India.
Job Description:-
Job Title: Python Developer
Key Requirements:-
- Mine data from structured and unstructured data sources.
- Extract data (text, images, and videos) from multiple documents in different formats.
- Extract information and intelligence from data.
- Extract data based on regular expressions.
- Collect data from structured RDBMS databases.
- Work closely with Project/Business/Research teams to provide mined data/intelligence for analysis.
- Should have strong exposure to core python skills like multiprocessing, multithreading, file handling, data structure like JSON, Data frames, and User Defined Data structure.
- Should have excellent knowledge of classes, file handling, memory manipulations.
- Strong Knowledge in Python.
- Strong exposure to frond end languages like CSS, JavaScript, Ajax etc.
- Should have exposure to requests, Frontera, scarpy-cluster, elastic-search, distributed computing tools like Kafka, Hbase, Redis, Zookeeper, restAPI.
- Should be familiar with *nix development environment.
- Knowledge of Django will be added advantage.
- Excellent knowledge on Web Crawling/Web scraping.
- Should have used scraping modules like Selenium, Scrapy, and Beautiful soup.
- Experience with text processing.
- Basics of databases. Good troubleshooting and debugging skills.
Experience : 1-4 Years Experiene
Education
B.Tech, MCA, Computer Engineering












