SDE-JAVA - BACKEND - API Integration

JOB DESCRIPTION

Experience: 10+ years

Wissen Technology is now hiring for a Senior Java Developer - Bangalore 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. - 10+ 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.

About the Role

We are looking for a Senior Backend Engineer to join our core engineering team and help build high-

throughput, low-latency services that power real-time trading at scale. What We’re Looking For

You are someone who has built backend systems in a regulated, high-stakes environment — ideally fintech, brokerage, payments, or banking. You think in terms of system reliability, data correctness, and operational

excellence. You take ownership of services end-to-end: from design and implementation through deployment, monitoring, and incident response. You communicate clearly, make pragmatic trade-offs, and hold yourself and

your peers to a high engineering bar. What You’ll Do

• Design, build, and own backend microservices for a real-time trading platform — from API contracts

through to production observability. • Work with databases, caches, and event-driven architectures to ensure high availability and data

consistency across distributed systems. • Build integrations with third-party financial services — clearing, settlement, identity verification, and

payment rails. • Define and enforce engineering standards — code reviews, testing strategies, API design conventions, and incident response processes. • Collaborate with product, design, and cross-functional teams to translate business requirements into

well-scoped technical deliverables. • Participate in on-call rotations and own production reliability for the services you build. • Mentor junior engineers and contribute to a culture of technical excellence and continuous improvement. Must-Have

• 5+ years backend engineering experience with Golang and Java in production. • Strong experience with PostgreSQL, Redis, and event-driven messaging (Kafka, NATS, or RabbitMQ). • Experience building and maintaining REST/gRPC APIs at scale with proper error handling, rate limiting, and versioning. • Understanding of financial systems — ledgers, reconciliation, order lifecycle, or payment processing.

• Experience with microservices architecture, API gateways, and service-to-service communication

patterns. • Familiarity with CI/CD pipelines, containerization (Docker/Kubernetes), and cloud infrastructure (AWS or

GCP). • Strong debugging and incident-response skills in distributed systems. Nice-to-Have

• Prior experience at a brokerage, wealth-tech, neo-bank, or payments company. • Experience with clearing broker integrations or introducing broker models. • Knowledge of compliance and regulatory requirements for cross-border financial products. • Experience with search infrastructure (Typesense, Elasticsearch). • Background in performance engineering — profiling, load testing, and latency optimization. Tech Stack

Languages Golang (primary), Java; Python (analytics/scripting)

Databases PostgreSQL, Redis, Typesense

Messaging Kafka, NATS, SSE / WebSocket

Infrastructure Docker, Kubernetes, AWS/GCP, Terraform

Integrations Clearing broker APIs, KYC providers, payment gateways

Observability Datadog / Grafana, PagerDuty, structured logging (ELK)

Job Title: Senior Node.js Developer

Company: Transact Bridge

Location: Noida, Uttar Pradesh

Experience: 4–7 Years

Industry: FinTech / Payments / Cross-Border Commerce (LinkedIn)

About the Company:

Transact Bridge is a fast-growing fintech company enabling global businesses to expand into India through its Merchant of Record (MoR) infrastructure. The company specialises in payment processing, compliance management, subscription billing, taxation, and cross-border payment solutions for global SaaS, digital product, and e-commerce businesses. (LinkedIn).

Role Overview:

We are looking for a highly skilled Senior Node.js Developer to join our engineering team. The ideal candidate will have strong experience building scalable backend systems, APIs, and microservices in high-growth product environments. Experience in fintech, payment gateways, subscription platforms, or transaction-heavy applications will be a strong advantage.

Key Responsibilities:

• Design, develop, and maintain scalable backend applications using Node.js and TypeScript.
• Build and optimize RESTful APIs and microservices architecture.
• Integrate payment gateways, third-party APIs, and external services.
• Develop secure, high-performance, and fault-tolerant systems.
• Collaborate with product, frontend, and DevOps teams to deliver new features.
• Optimize database performance and ensure data integrity.
• Write clean, reusable, and maintainable code following best practices.
• Participate in code reviews, architecture discussions, and technical planning.
• Troubleshoot production issues and implement long-term solutions.
• Ensure application security, scalability, and compliance standards.

Required Skills:

• 4–7 years of experience in backend development.
• Strong expertise in Node.js, Express.js, and TypeScript.
• Experience building REST APIs and microservices.
• Strong understanding of asynchronous programming and event-driven architecture.
• Hands-on experience with MongoDB or similar databases.
• Experience with Redis, caching strategies, and queue management systems.
• Familiarity with AWS, Lambda, Docker, and cloud-native applications.
• Knowledge of Git, Github workflow pipelines, and software development best practices.
• Strong problem-solving and debugging skills.

Good to Have:

• Experience in FinTech, Payments, Banking, SaaS, or Subscription-based products.
• Exposure to payment gateways, UPI, recurring payments, and transaction processing.
• Experience with GraphQL, Kafka, RabbitMQ, or similar technologies.
• Knowledge of system design and distributed architectures. (Get Me Referred)

What We Offer:

• Opportunity to work on a global fintech product.
• Exposure to cross-border payment infrastructure and high-scale systems.
• Fast-paced startup environment with ownership and growth opportunities.
• Collaborative engineering culture and direct impact on product development.
• Competitive compensation and performance-driven growth.

About RapidClaims

RapidClaims is a leader in AI-driven revenue cycle management, transforming medical

coding and revenue operations with cutting-edge technology.

The company has raised $11 million in total funding from top investors, including Accel

and Together Fund.

Join us as we scale a cloud-native platform that runs transformer-based Large Language

Models rigorously fine-tuned on millions of clinical notes and claims every month. You’ll

engineer autonomous coding pipelines that parse ICD-10-CM, CPT® and HCPCS at

lightning speed, deliver reimbursement insights with sub-second latency and >99 %

accuracy, and tackle the deep-domain challenges that make clinical AI one of the

hardest—and most rewarding—problems in tech.

Engineering Manager- Job Overview

We are looking for an Engineering Manager who can lead a team of engineers while

staying deeply involved in technical decisions. This role requires a strong mix of people

leadership, system design expertise, and execution focus to deliver high-quality product

features at speed. You will work closely with Product and Leadership to translate

requirements into scalable technical solutions and build a high-performance engineering

culture.

Key Responsibilities:

● Lead, mentor, and grow a team of software engineers

● Drive end-to-end ownership of product features from design to deployment

● Work closely with Product to translate requirements into technical solutions

● Define architecture and ensure scalability, reliability, and performance

● Establish engineering best practices, code quality, and review standards

● Improve development velocity, sprint planning, and execution discipline

● Hire strong engineering talent and build a solid team

● Create a culture of accountability, ownership, and problem-solving

● Ensure timely releases without compromising quality

● Stay hands-on with critical technical decisions and reviews

.

Requirements:

● 5+ years of software engineering experience, with 2+ years in team leadership

● Strong experience in building and scaling backend systems and APIs

● Experience working in a product/startup environment

● Good understanding of system design, architecture, and databases

● Ability to manage engineers while remaining technically credible

● Strong problem-solving and decision-making skills

● Experience working closely with Product teams

● High ownership mindset and bias for action

Good to Have

● Experience in healthcare tech / automation / RPA / AI tools

● Experience building internal tools and workflow systems

● Exposure to cloud infrastructure (AWS/GCP/Azure)

Responsibilities:

• Design and develop large scale web applications using Node.js; 
• Full-cycle projects and product development; 
• Focus on software development and build Restful API's; 
• Contribute to the overall software development life-cycle including requirements gathering, analysis, design, development, release/version control, testing, deployment, and support; 
• Be a part of an agile-based team 

Requirements:

• Exposure to ES6 knowledge of REST API Design and Development in Node.js. 
• Basic Knowledge of Web Socket.
• Strong Knowledge of Javascript, Good exposure to Redis, MongoDB.
• Should be having a basic understanding of HTML5, CSS3, Bootstrap4.

We Offer:

• 5 Days Working
• Competitive Salary.
• Knowledge-Based Hierarchy 
• Trending Technology Development
• Career Development Programs.
• Tremendous Scope of Responsibilities and KPIs Aligned with Individual and Organisational Goals.
• Exposure to working with a team size of 65+.
• Good Project Incentives and Rewards.
• Explore Incredible India!Workation Programmes with Airfare, Hotelstay.
• Work-Life Balance.
• Fantastic Team Spirit with Creative, Fun and Open Office Work Culture.

Company: Runo – https://runo.in

Location: Hyderabad, India

Who We Are:

Runo is a product based funded company incubated at T-Hub (IIITH Campus) and currently operating from Cyber Towers, HiTec City. We offer Call Management CRM for sales teams across the world. We are currently scaling up the engineering team to support the continued growth of the user acquisition in the global market, after a steady success in the Indian market.

The Role:

Runo is looking for a Lead Backend Developer to join our team. The lead backend developer is responsible for scaling up the existing architecture to handle billions of requests every month (We are currently at a scale of 100 million requests per month). You will be contributing in architecting the database/reporting layer to support complex queries and data exports of millions of records. You will be a lead developer responsible for development of new software products and enhancements to existing products.

Our Ideal candidate:

• Proficiency in NodeJS.
• Expert knowledge of NoSQL Databases (MongoDB is preferred)
• Hands on experience of working on products handling more than a million requests per month
• 4-8 years of relevant professional work experience 
• Self-motivated, able to work independently. Commitment to high quality.

Responsibilities:

• Contribute to the product architecture in handling millions of requests per day.
• Optimizing the architecture for regional data zones.
• Develop high performance, reusable & bug free APIs
• Optimize the existing APIs for performance (by data denormalization/ decoupling the long running APIs using queues)
• Get familiar with the AWS Services like API Gateway, Lambdas, SNS, SQS, SES

What We Offer: 

• Competitive Salary
• ESOPs
• Medical Insurance

A passionate developer

• Strong working knowledge of OOPS
• Functional programming principles
• Strong believer of Clean Code practices
• An advocate of TDD, BDD, SOLID, CI/CD, Lean development
  
  You’ll easily settle in if:
  You come from a strong Java/J2EE background with web application frameworks like Spring Boot or Drop wizard
  You have ample work experience in Caching, Multi-Threading, Asynchronous APIs, Exception Management and use of collections, Mocking, Unit testing tools like Junit & TestNG"
  You are fluent with version control tools like GIT and Bitbucket
   Experience with Continuous Integration, Continuous Deployment, Static Code Analysis, Jenkins and SonarQube
  Willingness to take ownership of the technical solution and ensure technical expectations of deliverables are met.
   Exposure to AWS/Azure cloud and containerization
  Have a good Understanding of Distributed Application Architecture.
  You ‘ll love:
  Awesome opportunity to work with Micro Services architecture getting shipped on Cloud.
  Experience in working with automated build deploy powered by Code Analysis, Automated Tests, Functional and Nonfunctional analysis, Blue Green deployment and much more
   First-hand experience on broader enterprise application concerns like Message Bus, Queues, Caches, Concurrency and Parallelization

Work as a member of a team responsible for developing a large-scale, highly available and fault-tolerant SaaS based Leasing & Asset management solution in the commercial real estate space in accordance with established processes. You will apply your knowledge of building scalable, distributed applications and have the opportunity to work with technologies & frameworks such as Ruby on Rails, NodeJS, ReactJS, Heroku, AWS, Postgres DB​

Essential Functions include but are not limited to the following. 

You will be expected to:​

• Contribute to all phases in the software lifecycle – requirements analysis, solution design, development, and deployment
• Maintain high quality standards for the work undertaken and be responsible for the quality of deliverables.
• Ensure assigned projects are developed in accordance with established engineering processes, adhering to scope, schedule constraints and agile project plans
• Guide/mentor the less experienced team members
• Participate in code reviews
• Work effectively as part of a distributed team
• Document the features worked by him/her

Key technical expertise areas expected for this role:

• Strong programming skills in Ruby with clear understanding of Object-Oriented and Functional programming. 
• Experience working with Ruby on Rails framework
• Experience on REST API Programming preferably based on a Microservices Architecture
• Good Understanding of Databases (Postgres) and proficiency in database schema designing & writing efficient SQL Queries. 
• Strong troubleshooting skills
• Demonstrable ability to learn new programming languages and frameworks quickly
• Experience with distributed systems with specific focus on security and scalability
• Experience with modern cloud technologies such as AWS

 Additional areas that would add value:

• Experience working with Cloud Service providers & platforms like AWS, Heroku 
• Strong understanding of Design Patterns & their application in system design
• Test Driven & Behavior Driven Development
• Automated Unit/Integration testing
• Using DevOps & Infrastructure tooling such as GoCD/Jenkins, Git
• Frontend web development with JavaScript frameworks like React
• Experience working on  projects, preferably in the real estate domain
• Experience working with Virtualization and Containerization technologies including Docker, Kubernetes.
• Experience working in Agile Scrum/Kanban methodologies
• Experience working with Linux and Shell scripting

Education: 

• Bachelors or Master’s in Computer Science or related fields