Senior Software Engineer (SDE III)

Role Overview We are seeking an exceptionally skilled and driven Senior Java Backend Developer to anchor the core platform. This role is critical to architecting and delivering a hyper-scalable, low-latency, and distributed system capable of supporting millions of concurrent users and high-velocity data flow. You will take extreme ownership of mission-critical services, aiming to set a new standard. This platform must be designed for cloud-agnostic deployment from day one. Key Responsibilities ● Architecture & Design: Design, develop, and maintain high-performance, resilient, and fault-tolerant backend services and APIs using Java and Spring Boot/Quarkus. ● Microservices Implementation: Drive the decomposition and development of services within a microservices architecture, focusing on clear contract definition, service mesh integration, and inter-service communication patterns (e.g., gRPC, REST). ● Real-Time & Low Latency: Implement and optimize real-time, bi-directional communication channels (e.g., WebSockets, MQTT) for instantaneous data synchronization and persistent connection management for millions of mobile clients. ● Database & Data Flow: Design and optimize data models and persistence layers, integrating with high-volume, low-latency databases like Cassandra, ScyllaDB, or Aerospike for primary data storage, and ensuring efficient caching and read/write performance. ● Scalability & Resilience: Implement advanced techniques for horizontal scaling, distributed transactions, circuit breakers, and load balancing to ensure 99.99% uptime and operational resilience. ● Ability to perform Research / POCs & choose the suitable technology. Required Expertise (2-4Years Experience Focus) ● Core Java & Frameworks: 2-4 years of hands-on experience in Java, with deep, production-grade expertise in Spring Boot (or equivalent, e.g., Quarkus/Micronaut) for building RESTful and event-driven services. ● Distributed Systems: Proven experience designing and implementing scalable services within a distributed system/microservices architecture, including experience with service discovery and configuration management. ● Concurrency & Performance: Mastery of Java concurrency primitives and advanced performance tuning (JVM optimization, garbage collection tuning, thread pool management) to achieve sub-100ms P95 latency. ● Messaging & Eventing: Expert knowledge of and hands-on experience with high-throughput message brokers like Apache Kafka or RabbitMQ for handling high-velocity data, notifications, and background processing. ● Database Expertise: Deep practical experience with at least one NoSQL distributed database (e.g., Cassandra, ScyllaDB, or Aerospike) and strong SQL proficiency (e.g., MySQL, Postgres), including complex query optimization and schema evolution. ● Testing & Quality: Proven ability to write high-quality, well-tested code, utilizing frameworks like JUnit, Mockito, and focusing on unit, integration, and performance testing. Scalability & Performance Expectations ● User Volume: Successfully design and scale the application backend to handle millions of concurrent, persistent mobile connections. ● Latency Goal: Services must be tuned for P95 latency of less than 100 milliseconds for critical operations like data sync and status updates. ● Cloud-Agnostic Design: Demonstrate experience designing applications for a truly cloud-agnostic environment, utilizing containerization (Docker, Kubernetes) and abstracting infrastructure dependencies to allow seamless migration between AWS, GCP, or Azure. ● Monitoring & Observability: Strong experience implementing and utilizing a robust observability stack (e.g., Prometheus/Grafana, ELK/Loki, distributed tracing like Jaeger/Zipkin) to profile performance and rapidly diagnose production issues. Startup Mindset & Delivery Goals ● Extreme Ownership: Ability to own a feature end-to-end, from architectural design and coding to deployment and post-launch monitoring, taking full responsibility for its success and reliability. ● Collaboration & Iteration: Thrive in a fast-paced, iterative environment, collaborating closely with mobile developers, product managers, and cloud engineers. ● Impact Focus: A strong bias for action, prioritizing work that directly impacts product

We are a dynamic and innovative technology company dedicated to delivering cutting-edge solutions that empower businesses and individuals. As we continue to grow and expand our offerings, we are seeking a coding fanatic, who is interested in working on and learning new technologies. 

Position - Backend developer 

Job type - Freelance or on contract 

Location - Remote 

Roles and Responsibilities:

• Plan,create and test REST APIs for back-end services such as authentication and authorization.
• Deploy and maintain backend systems on the cloud.
• Research and develop solutions for real life business problems.
• Creating and maintaining our apps' essential business logic, providing correct data processing and flawless user experiences.
• Database design, implementation, and management, including schema design, query optimisation and data integrity.
• Participating in code reviews, providing constructive input, and ensuring that code quality standards are met.
• Keep abreast of industry developments and best practices to bring new solutions to our initiatives.

Required skills and experience - 

Must have skills : -

• Bachelor’s degree in computer programming, computer science, or a related field.
• 3 + years of experience in backend development.
• Proficient in Python,Mongodb,postgres/sql,Django and Flask
• Knowledge on nginx.
• C++/C +Cython for creating python modules
• Knowledge on Redis
• Familiarity with using AI provider apis and prompt engineering
• Experience in working with linux based instances on the cloud.
• Strong problem solving and verbal and written communication skills.
• Ability to work independently or with a group.

Good to have skills :- 

• Experience in node.js and Java 
• AWS and Google cloud knowledge.

Backend Developer - Node.JS - AirFi

AirFi is a market leader in providing portable Onboard Passenger Entertainment and Mobile Crew Sales Solutions to various passenger travel segments. Founded in 2011 in The Hague, Netherlands - AirFi is the world's fastest-growing company in mobile InFlight Entertainment space and in providing ancillary sales solutions to enterprise customers.

AirFi brings disruptive innovations in a cost-effective manner to the airline cabin and other modes of passenger transport mediums and is making thousands of passengers and crew happy every day all over the globe!

Your key responsibilities

• Responsible for ideating, designing, developing, and supporting the backend services of AirFi web apps for different modes of passenger transport including major airlines across the world.
• Manage your components independently, including but not limited to: gather requirements; communicate design decisions to cross-functional teams including data science, engineering, analytics, and operations; proactively seek user feedback.
• You will help AirFi to quickly iterate and scale web app development to different segments of customers with standard processes, automation, monitoring, and rapid quality assurance.
• Proactively monitor the web apps space for continuous improvements and optimisations, looking for new opportunities and challenges.

What we look for

• Exposure to product development, self-driven, highly motivated and you must be independent in managing on your own components or features
• You must be extremely collaborative and enjoy working cross-functionally with other engineers, designers, and stakeholders
• You must possess an affinity for metrics and analytics - You must be proactive and must move fast or pivot to meet the changing needs of the product
• You are a problem solver and can use everything from front end to command-line tools to help you identify and fix issues.
• You should be diligent, thoughtful, have an eye for detail and have great oral and written communication skills
• Work with product and engineering teams on different data driven products and help drive/implement the Data flows for the same.
• Designing, integrating and documenting technical components for seamless data extraction and analysis

Must have technical skills

• MUST: Experience in Javascript or any modern-day JS frameworks - 7+ years
• Experience NodeJS, MongoDB or any other NoSQL DB - 7+ years
• Experience on building RESTful services and MVC patterns - 5+ years

You get bonus point for

• Responsive web-frameworks (e.g. Foundation, Bootstrap)
• Experience in AngularJS, React, etc - 2+ years
• Linux skills (we run on embedded Linux)
• Expertise HTML5, CSS,
• Experience on Cloudant, AWS, GCP etc.

• Experience on eCommerce or payments related domains

We promise to provide opportunities that not only satisfy your creative instincts but also let you make a significant impact on the products that we create and ultimately the business we are in. We provide a great platform to take up multiple roles based on individual interests or skills and collaborate with different global teams. We boast of a professional, fun work environment with a flat hierarchy and super supportive people to work with. We also encourage a work culture where - no idea is a bad idea and the team can shout it out to be heard!

Some of our benefits that our employees cherish:

• Flexible work timings, remote working and work from home options
• Liberal employee policies including genuine open-door policy and special focus on keeping the work culture non toxic
• A very liberal leave policy that includes paternity, adoption and sabbatical leaves
• We provide Skill enhancement sponsorships
• Celebratory team events, regular team virtual GupShups and fun engagement activities including the annual team (destination) meetings and the annual family gala dinner!
• Meal coupons and random gift vouchers
• Career longevity perks and so on!

When we're in office some of the things that make AirFi an interesting place to work are - healthy breakfast, snacks and a fully loaded pantry (read: health alert!); we try to keep AirFi as a fun place to work at and have interesting team activities on Fridays with occasional beers. 

You get the opportunity to work and socialise with our global team when they visit or when you visit our customer offices/hangers. Last but not the least, in case you are an aviation geek - the opportunity to be on test flights and learn how the aviation industry works!

• https://www.linkedin.com/company/airfi">LinkedIn
• https://www.facebook.com/AirFi.aero">Facebook
• https://twitter.com/airfi_aero">Twitter
• http://airfi.aero/">Website

We are seeking a lead Python Developer to lead the backend efforts and, in the process design, develop, and deploy its customer centric applications.

The person will have the opportunity to design and build an early stage, rapidly evolving platform from scratch and carry out these primary responsibilities -

Optimize components for maximum performance across multiple devices and browsers

Write performant REST APIs for both internal and external consumption

Build micro services and their deployment process

Work with problems of scale, leveraging technologies that are distributed in nature.

Perform code reviews

Required qualifications and must have skills

Excellent analytical and problem-solving skills

Proven-deep-expertise with Python programming (4+ years of hands-on experience in Python and backend development)

Building performant and scalable applications from scratch

Experience in working with frameworks like Django, Flask, etc.

Experience with building APIs and services using REST, SOAP, etc.

Experience with any RDBMS and strong SQL knowledge

Comfortable with Unix / Linux command line

Object-oriented concepts & design patterns

Sytem and database desinging skills

Nice to have Skills

Knowledge of other programming languages beyond Python

Familiarity with managing infrastructure on AWS/GCloud

Experience with working with/building data analytics pipleline

Familiarity with NoSQL databases

Good understanding of Docker and container platforms like Mesos and Kubernetes

Security-first architecture approach

Application benchmarking and optimization

Interpersonal Attributes

You are driven by the impact your work creates

You can answer the why behind any technological choice you make

You can work independently as well as part of a team

Appristine Technologies. We are based in Pune and we are hiring for the following role.

1. PHP Developer – 2+ Years Exp.

Skill:-

• Strong skill level in PHP
• Intermediate skill level in HTML and CSS
• Intermediate skill level in JavaScript or JQuery
• Intermediate skill level in at least one server-side language (i.e. Java, Python, etc)
• Intermediate skill level with relational database systems (i.e. PostgreSQL, MySQL, etc)
• Intermediate skill level with a source control software (i.e. Git, SVN, etc)
• Good understanding of UI/UX design principles
• Strong technical and non-technical communication skills
• Good understanding of object-oriented programming