VBA Developer

Overview:

We're looking for a Full Stack Developer with strong backend expertise who can build,

manage, and scale AI-driven products end to end. You'll play a critical role in designing

scalable architectures, optimizing performance and cost, and building robust AI and agentic

systems.

Responsibilities

1. Architect and build scalable backend systems using FastAPI, PostgreSQL, and Redis.

2. Design, develop, and maintain AI-driven applications, integrating multiple LLMs, APIs,

and agentic frameworks.

3. Implement vector databases (pgvector, Qdrant, etc.) for RAG and AI memory systems.

4. Orchestrate multi-agent AI systems with LangChain/LangGraph, including function

calling, agent collaboration, and monitoring.

5. Build and integrate RESTful APIs for frontend and external use.

6. Manage DevOps workflows, including CI/CD, cloud deployments (AWS/GCP), server

scaling, and logging/monitoring (Sentry).

7. Optimize application cost, latency, and reliability, balancing speed with LLM call

efficiency and caching strategies.

8. Collaborate with product, design, and AI teams to translate business requirements into

high-performing tech.

9. Maintain documentation and ensure code quality with tests, reviews, and async-first

architecture.

10. Contribute to frontend development (React + TypeScript) when necessary, ensuring

seamless API integration and data visualization.

Requirements

Core Skills

• Strong proficiency in Python and FastAPI.

• Experience with PostgreSQL (including pgvector) and SQLAlchemy (async).

• Solid understanding of Redis, RQ (Redis Queue), and caching mechanisms.

• Proven experience integrating LLMs and AI APIs (OpenAI, Anthropic, etc.).

• Hands-on experience with LangChain / LangGraph, RAG pipelines, and agent

orchestration.

• Experience working with cloud platforms (AWS / GCP) and managing file storage (S3).

• Familiarity with frontend stacks (React, TypeScript, Tailwind, Zustand).

• Working knowledge of DevOps: Docker, CI/CD pipelines, deployment automation, and

observability tools (Sentry, Mixpanel, Clarity).

Bonus / Nice to Have

• Experience building agent monitoring dashboards or AI workflows.

• Prior experience in startup or product-based environments.

• Understanding of LLM cost optimization, token management, and function calling

orchestration.

• Familiarity with external API integrations like BrightData, Hunter.io, Adzuna, and Serper.

• Experience building scalable AI products (e.g., chatbots, AI copilots, data agents, or

automation tools).

Mindset

• Startup-ready: comfortable working in fast-paced, ambiguous environments.

• Deep curiosity about AI systems and automation.

• Strong sense of ownership and accountability for shipped products.

• Pragmatic and cost-conscious in architectural decisions.

• Excellent communication and documentation skills.

Full Stack Developer – React + Node.js + SQL + Team Lead + Excellent comms

Job Title: Full Stack Developer (React + Node.js + SQL)

Experience: 7+ years

Job Summary:

We are seeking a highly capable full stack developer proficient in React, Node.js, and SQL. The ideal candidate will be responsible for developing scalable web applications and APIs, integrating with relational databases, and delivering high-quality, maintainable code.

Key Responsibilities:

• Design and develop front-end interfaces using React with Redux/Context API.
• Build RESTful APIs and backend services using Node.js (Express.js).
• Integrate and optimize SQL queries with PostgreSQL, MySQL, or MS SQL Server.
• Ensure responsive design and cross-browser compatibility.
• Collaborate with UI/UX designers, testers, and backend engineers.
• Write unit and integration tests to ensure code quality and reliability.

Required Skills:

• Strong hands-on experience with React.js and Node.js.
• Proficiency in SQL and experience with relational database systems.
• Knowledge of RESTful API design and microservices architecture.
• Familiarity with version control systems (Git), CI/CD pipelines.
• Strong understanding of HTML, CSS, and JavaScript (ES6+).

Good to Have:

• Experience with GraphQL, TypeScript, or NoSQL databases.
• Cloud deployment experience (AWS/Azure).
• Containerization knowledge (Docker/Kubernetes).
• Agile/Scrum project methodology experience.

Key Skills Required

• 5–7 years of experience in Oracle Fusion Cloud Applications
• Strong hands-on experience in:
• BI Publisher (BIP)
• OBIEE reports
• AP Payment Templates
• Experience in minimum 2 end-to-end implementations including:
• Fusion Finance implementations
• Rollouts, upgrades, lift & shift
• Managed services projects
• Good process and table-level knowledge of Fusion Financial modules:
• GL, AP, AR, FA, Cash Management
• Intercompany, Expenses, Procurement
• Experience with Flexfields and Extensions
• Hands-on experience in Unit Testing & UAT support
• Experience in data upload/migration using FBDI / ADFDI
• Strong communication and client-handling skills
• Ability to independently conduct client workshops

About the Role:

We are looking for an experienced VoIP Developer to design, develop, and maintain enterprise communication systems. You will work with Kamailio, OpenSIPS, Freeswitch, and Asterisk to build scalable VoIP solutions.

Skills Required:

• Hands-on experience with Kamailio, OpenSIPS, Freeswitch, Asterisk
• Knowledge of IMS & Diameter
• Proficiency in C / C++ programming
• Strong understanding of TCP/IP, LAN/WAN, VLAN/L3 VPNs
• Good knowledge of SIP/SDP, RTP/SRTP, TLS protocols
• Experience with MySQL / MongoDB
• Understanding of Enterprise PBX features
• Problem-solving and debugging skills
• Good written and verbal communication

Nice-to-Have:

• Building softPBX, Voicemail, ACD, IVRS applications
• Experience with Python, PHP, Java, JavaScript
• Linux administration and command-line skills
• Knowledge of WebRTC, firewall, security
• Familiarity with tools like cmake and git

What We Offer:

• Remote / flexible work options
• Opportunity to work on large-scale VoIP systems
• Collaborative environment with skilled peers

What you will do:

• Understand the process of CaaStle business teams, KPIs, and pain points
• Build scalable data products, self-service tools, data cubes to analyze and present data associated with acquisition, retention, product performance, operations, client services, etc.
• Closely partner with data engineering, product, and business teams and participate in requirements capture, research design, data collection, dashboard generation, and translation of results into actionable insights that can add value for business stakeholders
• Leverage advanced analytics to drive key success metrics for business and revenue generation
• Operationalize, implement, and automate changes to drive data-driven decisions
• Attend and play an active role in answering questions from the executive and/or business teams through data mining and analysis

We would love for you to have:

• Education: Advanced degree in Computer Science, Statistics, Mathematics, Engineering, Economics, Business Analytics or related field is required
• Experience: 2-4 years of professional experience
• Proficiency in data visualization/reporting tools (i.e. Tableau, Qlikview, etc.)
• Experience in A/B testing and measure performance of experiments
• Strong proficiency with SQL-based languages. Experience with large scale data analytics technologies (i.e., Hadoop and Spark)
• Strong analytical skills and business mindset with the ability to translate complex concepts and analysis into clear and concise takeaways to drive insights and strategies
• Excellent communication, social, and presentation skills with meticulous attention to detail
• Programming experience in Python, R, or other languages
• Knowledge of Data mining, statistical modeling approaches, and techniques

CaaStle is committed to equality of opportunity in employment. It has been and will continue to be the policy of CaaStle to provide full and equal employment opportunities to all employees and candidates for employment without regard to race, color, religion, national or ethnic origin, veteran status, age, sexual orientation, gender identity, or physical or mental disability. This policy applies to all terms, conditions and privileges of employment, such as those pertaining to training, transfer, promotion, compensation and recreational programs.

Digital Marketer

We are looking for a talented Digital Marketer to join our dynamic marketing team. The ideal candidate will be responsible for developing and implementing online marketing strategies to drive brand awareness, engagement, and conversions.

Key Responsibilities:

● Develop and execute digital marketing campaigns: Plan, create, and implement multi-channel digital marketing campaigns across various platforms including social media, email, search engines, and display advertising.

● Content Creation: produce high-quality content that aligns with marketing goals and enhances the online presence.

● SEO and SEM: Optimize website content for search engines (SEO) and manage paid advertising campaigns (SEM) to increase traffic and conversions.

● Social Media Management: Manage and grow the company's social media presence across all major platforms, engage with followers, and monitor social media trends.

● Email Marketing: Design and execute email marketing campaigns, segment email lists, and analyze campaign performance.

● Analytics and Reporting: Monitor and analyze the performance of digital marketing campaigns using tools like Google Analytics, and provide regular reports with actionable insights.

● Market Research: Conduct market research to identify trends, opportunities, and competitors’ strategies to enhance the company’s digital marketing efforts.

● Collaboration: Work closely with cross-functional teams including sales, product development, and customer support to ensure cohesive marketing strategies.

● Graphic Designing: Design and layout of e-newsletters, product catalogs, brochures, posters, and other marketing materials.

● Video Production: Plan, shoot, and edit engaging video content for digital platforms.

Requirements:

●Must have completed a bachelor's degree.

● Must have completed course in digital marketing

Additional information:

Workdays: 5 days working

Work Location: Adajan Surat Gujarat

Work hours: 9am to 6pm [40min. Flexibility]

This is a sales target-driven role that involves managing the day-to-day activities of the HQ marketing team in Bangalore. This role Involves coordination, tracking and managing timelines of deliverables as well as ensuring that quality standards are met. 

Responsibilities:

• Manage the global demand generation engine  
• Work towards increasing the number of sales qualified leads generated  
• Engage partners in areas such as lead generation, joint marketing efforts and events
• Coordinate Subex Secure’s presence in events
• Secure endorsements from analysts and media  
• Manage the digital marketing team
• Prepare content where needed for campaigns, social media, search engine optimization and marketing
• Coordinate with internal teams for preparation of collateral, deriving messaging and ensuring preparation of sales enablement material in a timely manner
• Intervene to improve marketing processes to improve the outcomes and efficiency of our global lead generation efforts

Requirements (please read these carefully before applying)

• Experience in managing planning and execution of global campaigns through Salesforce and Hubspot
• Have carried revenue targets or have at least played a key role in attaining these targets  
• Prior experience in B2B marketing involving a sophisticated product line is a must. Experience in marketing cybersecurity products will present a clear advantage.
• Prior experience in managing teams and revenue targets is an essential requirement
• You should have over 6 years of experience with B2B marketing
• Excellent understanding of SEM and SEO and ways to get leads out of SEM and increase volume of web traffic, improve domain authority and traffic quality through SEO
• Top notch project management skills
• Excellent content writing and presentation skills

The outcomes (KPI) associated with this role would be:

• Rise in the number of qualified opportunities and quality of leads processed by the sales team this includes Sales Accepted Leads and Sales Qualified Leads
• Quality and volume of engagements on social media and improvement in regional web traffic
• Your contribution towards improving our brand presence globally 
• Measured improvement in pipeline velocity
• Attainment of pipeline targets
• Timely execution of monthly and quarterly marketing plans

Requirements:

• At least 4+ years of experience as a Node.js developer.
• Must have knowledge of at least one card game with rules.
• Must have experience in multiplayer games with Socket.io
• Must have good communication skills in English.
• Superb interpersonal, communication, and collaboration skills.
• Exceptional analytical and problem-solving aptitude.
• Great organizational and time management skills.
• Knowledge of Game development life cycle.
• Must be willing to do hands-on coding where required and perform regular code reviews etc.
• Knowledge of JavaScript, TypeScript, NPMs, ExpressJS, MongoDB, Socket.io and Redis.
• Familiarity with AWS infrastructure.
• Basic knowledge of front-end technologies.
• Strong understanding of git.

Full-stack Developer 

We are looking  for 2-3 Year experienced person for our IoT Division based out of Bangalore. Option for Work from Home is also available.  


Responsibilities

• Design and implementation of the overall web architecture
• Design and deployment of our database, associated areas such as database design /management and DevOps.
• Ensuring the entire stack is designed and built for speed and scalability
• Design and construction of our API-Fast, REST.
• Integrating our front-end UI with the constructed API.
• Design and implementation of continuous integration and deployment
• Knowledge of JSON and PostgreSQL support for JSON.
• Creating a DB instance running PostgreSQL with the AWS Management Console.
• Knowledge of Redis cache.

Skills

• Writing HTML, CSS, and JavaScript/jQuery
• A relevant back-end programming language e.g., Python or JavaScript.
• Server management and deployment for the relevant environment
• Experience implementing testing platforms and unit tests
• Proficiency with Git.
• Appreciation for clean and well documented code.

Keywords: #AWS #EC2 #Python #Psql #Django #Docker #Redis #Kafka.