Marketing Data Engineering Specialist

Experienced Senior Full Stack Engineer to Build & Backend for Event Ticketing Platform Using Claude Code

Overview

We have the frontend already built in Replit for both user and admin experiences. We are looking for a very experienced software engineer to design, build, and scale a production ready backend for a high concurrency event ticketing platform.

This role is for a true senior engineer who actively uses Claude Code as part of their daily development workflow, understands how to review and harden AI assisted output, and can ship systems that hold up under real world load, QA, and security testing.

This is not a prototype or demo system. This backend must be reliable, scalable, secure, and extremely well documented.

What You Will Be Building

• Backend services for an event ticketing platform

• Multi tenant architecture supporting thousands of organizers and events

• High concurrency purchase and checkout flows

• Secure user, admin, and system level access controls

• Production deployments with secrets management, middleware, and security layers

• Observability, logging, and metrics suitable for QA and load testing

• A thoroughly documented backend that future engineers can onboard into quickly

Core Engineering Requirements

• 10 plus years of professional software engineering experience

• Expert level experience using Claude Code or equivalent AI coding agents in real production workflows

• Deep experience building backends with Node.js

• Strong experience with Supabase and PostgreSQL

• Experience deploying and scaling applications on Vercel

• Proven experience extending existing codebases safely

• Strong API design and database performance fundamentals

• Ability to reason clearly about concurrency, transactions, and failure modes

Scalability and Performance Expectations

The backend must be designed to support:

• Hundreds of thousands of ticket purchases

• Thousands of concurrent users and tenants

• Large traffic spikes during on sale windows

• Load testing across all major latency percentiles including p90, p95, and p99

• Extremely low tail latency under high concurrency

• Graceful degradation and recovery under stress

You should be comfortable designing and implementing caching strategies, queue based workflows, idempotent operations, locking mechanisms, and transactional safety.

Security and Production Readiness

You must be able to:

• Set up production environments with proper secrets management

• Implement middleware for authentication, authorization, and rate limiting

• Design secure communication between frontend and backend

• Apply industry best practices for security hardening

• Prepare the system to pass penetration testing

• Maintain clean separation of concerns and least privilege access

Documentation and Developer Experience Requirements

High quality documentation is a hard requirement for this role.

You must have experience:

• Using AI powered documentation tools to generate and maintain technical documentation

• Producing clear architectural overviews and system diagrams

• Writing detailed README files and onboarding guides

• Documenting APIs, data models, and critical flows

• Keeping documentation in sync with code changes over time

We expect the backend to be easy to understand, easy to extend, and well explained for future engineers.

How We Evaluate Candidates

We are looking for engineers who can demonstrate:

• Real production systems they have built or scaled

• Clear judgment in how they use Claude Code and validate AI generated output

• Strong opinions on production readiness backed by experience

• The ability to move fast without sacrificing quality or safety

A short paid technical task may be used that involves real backend work with production quality code and documentation.

About us

Blitz is into Instant Logistics in Southeast Asia. Blitz was founded in the year 2021. It is in the business of delivering orders using EV bikes. Blitz not only delivers instant orders through EV Bikes, but it also finances the EV bikes to the drivers on lease and generates another source of revenue from the leasing as well apart from delivery charges. Blitz is revolutionizing instant coordination with the help of advanced technology-based solutions. It is a product-driven company and uses modern technologies to build products that solve problems in EV-based Logistics. Blitz is utilizing data sources coming from the EV bikes through IOT and smart engines to make technology-driven decisions to create a delightful experience for consumers

About the Role

We are seeking an experienced Data Engineer to join our dynamic team. The Data Engineer will be responsible for designing, developing, and maintaining scalable data pipelines and infrastructure to support our data-driven initiatives. The ideal candidate will have a strong background in software engineering, database management, and data architecture, with a passion for building robust and efficient data systems

What you will do

1. Design, build, and maintain scalable data pipelines and infrastructure to ingest, process, and analyze large volumes of structured and unstructured data.
2. Collaborate with cross-functional teams to understand data requirements and develop solutions to meet business needs.
3. Optimise data processing and storage solutions for performance, reliability, and cost-effectiveness.
4. Implement data quality and validation processes to ensure accuracy and consistency of data. 
5. Monitor and troubleshoot data pipelines to identify and resolve issues in time.
6. Stay updated on emerging technologies and best practices in data engineering and recommend innovations to enhance our data infrastructure.
7. Document data pipelines, workflows, and infrastructure to facilitate knowledge sharing and ensure maintainability.
8. Create Data Dashboards from the datasets to visualize different data requirements

What we need

1. Bachelor's degree or higher in Computer Science, Engineering, or a related field.
2. Proven experience as a Data Engineer or similar role, with expertise in building and maintaining data pipelines and infrastructure.
3. Proficiency in programming languages such as Python, Java, or Scala.
4. Strong knowledge of database systems (e.g., SQL, NoSQL, BigQuery) and data warehousing concepts.
5. Experience with cloud platforms such as AWS, Azure, or Google Cloud Platform.
6. Familiarity with data processing frameworks and tools (e.g., Apache, Spark, Hadoop, Kafka).
7. Excellent problem-solving skills and attention to detail.
8. Strong communication and collaboration skills.

Preferred Qualifications

1. Advanced degree in Computer Science, Engineering, or related field.
2. Experience with containerization and orchestration technologies (e.g., Docker, Kubernetes).
3. Knowledge of machine learning and data analytics concepts.
4. Experience with DevOps practices and tools.
5. Certifications in relevant technologies (e.g., AWS Certified Big Data Specialty, Google Professional Data Engineer).

Please refer to the Company’s website - https://rideblitz.com/

About Us:

We’re looking to hire someone to help scale Machine Learning and NLP efforts at Episource. You’ll work with the team that develops the models powering Episource’s product focused on NLP driven medical coding. Some of the problems include improving our ICD code recommendations , clinical named entity recognition and information extraction from clinical notes.

This is a role for highly technical engineers who combine outstanding oral and written communication skills, and the ability to code up prototypes and productionalize using a large range of tools, frameworks, and languages. Most importantly they need to have the ability to autonomously plan and organize their work assignments based on high-level team goals.

What you will do at Episource:

You will be responsible for setting an agenda to develop and build machine learning platforms that positively impact the business, working with partners across the company including operations and engineering. You will be working closely with the machine learning team to design and implement back end components and services. You will be evaluating new technologies, enhancing the applications, and providing continuous improvements to produce high quality software.

Required Skills:

• Strong background in analytics, BI or data science deployments is preferable with 2-6 years of experience

• Knowledge of React/Vue, HTML, CSS

• Experience building and consuming APIs 

• Experience with MySQL, MongoDB and MEAN stack 

• Knowledge and experience with serverless architectures is a plus

• Hands-on experience with AWS or any major cloud service provider for deploying solutions

• Experience with Docker or Kubernetes in deploying solutions on the cloud

• Hands-on experience Python, Apache Spark & Big Data platforms to manipulate large-scale structured and unstructured datasets.

• Fluent in data fundamentals: SQL, data manipulation using a procedural language, statistics, experimentation, and modeling

Key Responsibilities: 

• Rewrite existing APIs in NodeJS. 
• Remodel the APIs into Micro services-based architecture. 
• Implement a caching layer wherever possible. 
• Optimize the API for high performance and scalability. 
• Write unit tests for API Testing.
• Automate the code testing and deployment process.

Skills Required: 

• At least 2 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds. 
• Excellent hands-on experience using MySQL or any other SQL Database. 
• Good knowledge of MongoDB or any other NoSQL Database. 
• Good knowledge of Redis, its data types, and their use cases. 
• Experience with graph-based databases like GraphQL and Neo4j. 
• Experience developing and deploying REST APIs. 
• Good knowledge of Unit Testing and available Test Frameworks. 
• Good understanding of advanced JS libraries and frameworks. 
• Experience with Web sockets, Service Workers, and Web Push Notifications. 
• Familiar with NodeJS profiling tools. 
• Proficient understanding of code versioning tools such as Git. 
• Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms. 
• Should be a fast learner and a go-getter — without any fear of trying out new things Preferences. 
• Experience building a large scale social or location-based app.

Nature of Work:

This being an advanced level position in the S/W development team the individual is expected to:
Participate as a team member in all phases of the S/W lifecycle, including the analysis and design of S/W systems.

Participate in a detailed level of coding, code walk – through and unit testing of S/W modules.
Participate in integrated testing of product/ package.

Participate in difficult and typical coding assignments with responsibility of a small module consisting of 3 – 5 members.

Participate in exploration/ feasibility study of products.
Have a thorough understanding of the assigned product/ project.

Participate in generating technical documentation of products/ packages.

Providing technical training to the juniors.
Manage allocated resources, keep compliance with discipline and decorum of the organization.

Keep compliance with Systems and Procedures.

Reports to:

Project Manager
Skill Set:
Thorough knowledge of current technological trends in Web based Software 

Strong Working knowledge of JSF/JSP, Servlets, Spring, Web application development and Core Java

• Working knowledge of working with databases using EJB.
• Knowledge of Bug Tracking tool such as Jira, Bugzilla and source code version control systems (SVN, GIT)
• Knowledge of working in Scrum methodology.
• Good to have knowledge of SonarQube and Web Security Aspects.
• Knowledge of Responsive Front End Development using HTML5, JavaScript, CSS3, JQuery, Ajax and JSON.
• Should be able to write test cases for the feature.
• Ability to gather and analyze data & draw logical conclusions

∙         Understanding of company’s vision & goals, business operations

and market

∙         Clear and concise oral and written communication skills

∙         Ability to establish and maintain effective work relationships at

all levels

∙         Great passion for S/W development.

∙         Ability to mentor and guide the juniors.

Office Address:

Tech Mahindra Ltd

Farmers Fresh Zone aims at unlocking access to safe-to-eat, pesticide-free fruits & vegetables directly sourced from our farmers. We are an omnichannel platform having both an offline and online presence. Backed by the Indian Angel Network, We are one of the first Indian agri-tech firms to introduce unit-level traceability for all our products which means consumers can track the origin of a product including details of the farms and farmers.

We are all in the quest to create a positive movement, a movement aimed at reducing the gap between a consumer & a farmer, a movement that gives consumers access to safe & non-toxic farmers' produce, a movement that is uplifting the farmer community. Today we are proud to say that we are connecting 1500+ farmers to urban consumers. We envisage our brand to go global soon, post creating a cemented presence in India.

We are not looking for job-seekers, we are looking for impact-creators with a go-getter attitude. We are looking for dynamic individuals who are honestly driven by the cause and are customer-obsessed, be it our end-user, farmer, vendor, or even our internal community.

As a Customer Retention & Market Automation Specialist, you will play a key role in driving & growing our mobile app & website’s engagement and retention metrics. You will run various messaging experiments on multiple channels like notifications, SMS, Email, Whatsapp.

Our ideal candidate will have strong analytical and problem solving skills, led or managed teams, and have understanding of engagement tools like Moengage, Clevertap or Webengage. We love people who are humble and collaborative with hunger for excellence.

Responsibilities:

• Create omni-channel (push notifications, Whatsapp, In-app prompts, SMS, Email etc) marketing campaigns & journeys based on different user segments to drive user acquisition, activation, engagement & retention.

• Define AARRR KPIs and Optimize them with Moengage multi-channel journeys by continuously performing A/B tests. Drive increased engagement & retention.

• Be responsible for and own execution, monitoring and measurement of marketing campaigns and their success. Collaborate with designers & Content creators to get graphic/text content.

• Compile regular reports of campaign performance and results, collaborate with analyst to monitor and review past campaigns and journeys.

• Improve new campaigns using data and feedback from existing and previous projects.

• Create detailed and diverse user-segments to identify high, medium & low activity cohorts. 

• Create communication & content strategies to increase the size of high-activity cohorts.

• Analyze website & mobile traffic, create user journeys & campaigns to enable cross-channel product experience and marketing.

Qualification & Requirements:

• Bachelor’s Degree in Computer Science, Engineering or any other related field.

• 1+ years of experience in creating mobile/web application journeys & campaigns on tools like moengage, clevertap etc.

• In-depth knowledge & hands on experience of digital analytics software like Zoho Page Sense, Google Analytics, CleverTap, Branch, Firebase, Facebook Analytics.

• Excellent copy writing skills to produce high quality copies for marketing campaigns and journeys.

Soft Skills:

• Ability to prioritize and manage multiple milestones and projects efficiently.

• Team spirit, good time-management skills, strong communication skills to collaborate with various stakeholders.

Detail oriented, advanced problem solving skills with customer-centric approach

We’re looking for a Senior Mobile Application Developer to work on Client & Internal Applications.  The successful candidate will be responsible designing, developing and implementing software solutions to address complex business issues.  The ideal applicant will be able to thrive in a highly collaborative workplace and actively engage in the development process hands-on. 

Company are looking for an Android developer - it will be a huge benefit if you are confident and able to build application in Objective C or Swift.

Requirements

• Experience with publishing APIs and in4tegrating with 3^rd party services
• Kotlin, Android, Java, Objective C, Swift
• Good knowledge of database (MySQL, SQLlite, Firebase)
• Able to publish Apps to Playstore & Appstore
• Experienced in building mobile applications that utilizes web services (SOAP / REST / JSON)
• An eye for design
• Extensive experience with Mobile features & libraries – Maps, Camera, Files, Wearables, GPS, QR Scanning etc.
• Experience with Tensorflow Lite
• Able to build responsive Ui that work with different devices
• Other programming languages are of benefit – HTML, CSS, PHP, C#

• Planning digital marketing campaigns, including web, SEO/SEM, email, social media and display advertising
• Content creation and repurposing for all digital channels
• Maintaining our social media presence across all digital channels
• Measuring and reporting on the performance of all digital marketing campaigns

• Plan and execute all digital marketing, including SEO/SEM, marketing database, email, social media, display advertising campaigns (Branding & Demand Generation) and events
• Design, build and maintain our social media presence
• Measure and report performance of all digital marketing campaigns, and assess against goals (ROI and KPIs)
• Identify trends and insights, and optimize spend and performance based on the insights
• Brainstorm new and creative growth strategies
• Plan, execute, and measure experiments and conversion tests
• Collaborate with internal teams to create landing pages and optimize user experience
• Utilize strong analytical ability to evaluate end-to-end customer experience across multiple channels and customer touch points
• Instrument conversion points and optimize user funnels
• Collaborate with agencies and other vendor partners
• Evaluate emerging technologies. Provide thought leadership and perspective for adoption where appropriate

• Bachelors/Masters degree in marketing or a related field
• Proven working experience in digital marketing
• Demonstrable experience leading and managing SEO/SEM, marketing database, email, social media and/or display advertising campaigns
• Highly creative with experience in identifying target audiences and devising digital campaigns that engage, inform and motivate
• Experience in optimizing landing pages and user funnels
• Experience with A/B and multivariate experiments
• Solid knowledge of website analytics tools (e.g., Google Analytics, NetInsight, Omniture, WebTrends)
• Working knowledge of ad serving tools (e.g., DART, Atlas)
• Experience in setting up and optimizing Google Adwords campaigns
• Working knowledge of HTML, CSS, and JavaScript development and constraints
• Strong analytical skills and data-driven thinking
• Up-to-date with the latest trends and best practices in online marketing and measurement

• Hands-on experience with various Microsoft technologies like .Net, ASP.Net, WCF, Web API, MVC SharePoint and/or Azure.
• Effective project and work-stream management.
• Strong understanding of Agile methodology and processes.
• Managing, mentoring and developing individuals into strong leads.
• Managing project effectively by defining milestones and schedules.
• Critically evaluating information gathered from multiple sources and reconciling conflicts.
• Interacting effectively with both technical and non-technical members on the team.
• Managing risks related to people, technology and processes.
• Ensuring adherence to standards and best practices.

Desired Profile:

• Minimum 10+ years of experience of shipping high quality software.
• Minimum 2 years’ experience of people management with proven track record of building and growing strong teams.
• Strong technical skills with computer science background or equivalent experience.
• Quick learner, ability to multi-task and work under pressure, and work with geographically distributed teams.
• Ability to influence management through presentations, written and verbal communication.
• Great leadership skills to work effectively with.
• Preferred candidates with valid US B1 visa and available to travel onsite at a very short notice.