Principal Software Engineer

Strong Backend Engineer Profiles

Mandatory (Experience 1) – Must have 2+ years of hands-on Backend Engineering experience building production-grade systems in a B2B SaaS or product environment

Mandatory (Experience 2) – Must have strong backend development experience using at least one backend framework such as FastAPI / Django (Python), Spring (Java), or Express (Node.js)

Mandatory (Experience 3) – Must have a solid understanding of backend fundamentals, including API development, service-oriented architecture, data structures, algorithms, and clean coding practices

Mandatory (Experience 4) – Must have strong experience working with databases (SQL and/or NoSQL), including efficient data modeling and query optimization

Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs and backend services, including integrations with external systems (CRMs, payment gateways, ERPs, data platforms, etc.)

Mandatory (Experience 6) – Must have experience working in cloud-based environments (AWS / GCP / Azure) and be familiar with Git-based collaborative development workflows

Mandatory (Domain) – Experience with financial systems, billing platforms, fintech applications, or SaaS revenue-related workflows is highly preferred

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

Job Description – Senior Java Developer (Spring Boot / Microservices)

Location: Chennai, India

Experience: 4+ Years

Availability: Immediate Joiner

About the Role:

We are looking for a highly skilled Java Developer with over 5 years of hands-on experience in building scalable backend systems using Java, Spring Boot, and Microservices architecture. The ideal candidate will have strong problem-solving skills, deep knowledge of backend frameworks, and a solid understanding of JUnit-based testing.

Key Responsibilities:

• Design, develop, and maintain high-performance backend systems using Java and Spring Boot
• Develop and deploy RESTful microservices in a distributed architecture
• Collaborate with cross-functional teams to define, design, and ship new features
• Write clean, scalable, and testable code following best practices
• Implement unit and integration tests using JUnit and other testing frameworks
• Participate in code reviews and contribute to improving team processes
• Troubleshoot and resolve production issues in a timely manner

Key Skills:

• Strong proficiency in Java
• Expertise in Spring Boot and related modules (Spring Data, Spring Security, etc.)
• Solid understanding of Microservices architecture, REST APIs, and inter-service communication
• Experience with JUnit and writing automated test cases
• Familiarity with CI/CD pipelines and version control (Git)
• Knowledge of containerization (Docker, Kubernetes) is a plus
• Exposure to messaging systems like Kafka or RabbitMQ is a plus
• Familiarity with databases (SQL/NoSQL)

Required Education:

B.Tech./ BE - Computer, IT, Electronics only

Required Skills:

• 3+ year of experience in Development in JAVA technology and springboot
• Strong Java Basics
• SpringBoot or Spring MVC
• Hands on experience on Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
• Proficient in REST API development
• Messaging Queue (RabitMQ or Kafka
• Any Caching Mechanism
• Good at problem solving

Good to Have Skills:

• 4+ years of experience in using Java/J2EE tech stacks
• Good understanding of data structures and algorithms.
• Excellent analytical and problem solving skills.
• Ability to work in a fast paced internet start-up environment.
• Experience in technical mentorship/coaching is highly desirable.
• Understanding of AI/ML algorithms is a plus.

𝗔𝗯𝗼𝘂𝘁 𝗖𝗲𝗿𝗰𝗹𝗲 𝗫

Cerclex is the one of leadinghttps://cerclex.com/"> waste management company in india which works as a digital technology platform for the waste management and recycling Industry with an extended outlook of circularity through its various ventures into the field of sustainability.

We have received FICCI Impactful Cleantech Startup Award, MeitY Emerging Startup Award, TVS Capital Budding Nxt Gen Entrepreneur Award, and many more for our digital solutions enabling transactions between waste generators, and aggregators, processors, and bringing in complete transparency, traceability to the waste ecosystem.

CercleX  helps brands to accomplish their sustainability targets withhttps://cerclex.com/extended-producer-responsibility/"> Extended Producer responsibility and researchhttps://cerclex.com/blog/the-effects-of-solid-waste-on-environment/"> solid waste managemet on the environment to ensure the environment is eco free.

To succeed as a backend developer, you should be focused on building a better, more efficient program and creating a better end-user experience. You should be knowledgeable, collaborative, and motivated.

Back-end Developer Responsibilities:

• Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement.
• Collaborating with the front-end developers and other team members to establish objectives and design more functional, cohesive codes to enhance the user experience.
• Developing ideas for new programs, products, or features by monitoring industry developments and trends.
• Recording data and reporting it to proper parties, such as clients or leadership.
  Participating in continuing education and training to remain current on best
• practices, learn new programming languages, and better assist other team members.
• Taking lead on projects, as needed.
• Develop web applications and web services using Java Spring Boot, Spring Cloud Frameworks, AWS
  
  Back-end Developer Requirements:
  
  
• Bachelor’s degree in computer programming, computer science, or a related field.
• Fluency or understanding of specific languages, such as Java, Nodejs,React,JSON,PHP, or Python, and operating systems may be required.
• Strong understanding of the web development cycle and programming techniques and tools.
• Focus on efficiency, user experience, and process improvement.

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

Thingworx Developer/Sr Developer

Required experience range between 3-6 years.

· Thingworx Navigate experience desired

· Languages - Java, JavaScript & CSS

· Experience in Core Java, Java collections & Oops Concept

· Databases – MySQL, MS-SQL

· Having good working knowledge with XML, JSON.

· Design and Application development using Thingworx version - (8.2,8.5,9.X)

· ThingWorx service creation using JavaScript

· Develop ThingWorx extension using Java

· ThingWorx service creation using Java Extension

· ThingWorx mashups design and development

· Data storage in ThingWorx - Stream/Value Stream/Data Tables

· Integration with source/target system using REST API, data Files.

· Familiar with Agile Methodologies (SCRUM)

· Thingworx Integration with 3rd apps preferred and will be added advantage

Job Description:

• Integration of user-facing elements developed by front-end developers.
• Build efficient, testable, and reusable PHP modules.
• Solve complex performance problems and architectural challenges.
• Integration of data storage solutions (may include databases, key-value stores, blob stores, etc.)
• Strong knowledge of PHP web frameworks (such as Laravel, Codeignitor, Yii, etc depending on your technology stack)
• Understanding the fully synchronous behavior of PHP.
• Understanding of MVC design patterns.
• Basic understanding of front-end technologies, such as JavaScript, JQuery, HTML5 and CSS3
• Knowledge of object oriented PHP programming
• Understanding accessibility and security compliance (Depending on the specific project)
• Strong knowledge of the common PHP or web server exploits and their solutions.
• Understanding fundamental design principles behind a scalable application
• User authentication and authorization between multiple systems, servers, and environments
• Integration of multiple data sources and databases into one system
• Familiarity with limitations of PHP as a platform and its workarounds
• Creating database schemas that represent and support business processes
• Familiarity with SQL/NoSQL databases and their declarative query languages
• Proficient understanding of code versioning tools, such as Gif.
• Build efficient, testable, and reusable PHP modules.
• Solve complex performance problems and architectural challenges
• Integration of data storage solutions (may include databases, key-value stores, blob stores, etc}
• Hands on Experience with AWS and NoSQL Database, Integration of AWS Services. (Mandatory)

Development: HTML5, CSS3, JS, JQuery, PHP(Must), Python, Java, Git, Dev Tools, C//.

Development Framework: Laravel, Codeigniter, React JS, Vue JS, Bootstrap. 

Tools: Trello, Slack, ASANA, Visual Studio Code, PHPStorm, Github, Selenium

Technologies Frameworks: Bootstrap, Laravel, WordPress. 

Design and develop robust services in coordination with front-end developers, ensuring the production and development of high-quality and well-tested code

Design, develop and test features alongside other technical departments

Lead the department in the design, development, deployment, and operation of services used by our users

Optimise APIs for any applications while creating and maintaining unit tests for new code as well as fix defects

Participate in the continuous integration of automated builds and deployments, ensuring that deliverables meet functional and design requirements and specifications of the site/software. Work with engineering leadership in solving and architecting solutions for challenging or complex site/software development issues.

Take initiatives in developing and maintaining integrations of best practices within the backend department