Senior .NET Full Stack Developer

Role Overview

We are seeking a highly skilled Senior Developer / Technical Lead with strong experience in marketing creative platforms and digital experience delivery. This role requires expertise in Sitecore, React.js, Node.js, Python, and FileMaker, along with proven leadership capabilities to guide development teams and deliver high-impact marketing solutions.

You will play a critical role in designing, developing, and leading the implementation of scalable, creative, and performance-driven digital experiences.

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Required Skills & Qualifications

Technical Skills

• Strong experience with:

o Sitecore CMS (content modeling, personalization, pipelines, APIs)

o React.js (modern front-end ecosystem)

o Node.js (RESTful APIs, server-side applications)

o Python (automation, backend systems, scripting)

• Experience with FileMaker (development, customization, or integration)

• Proficiency in HTML5, CSS3, JavaScript/TypeScript

• Experience with API design, microservices architecture, and cloud platforms (AWS )

• Familiarity with CI/CD pipelines, DevOps practices, and version control (Git)

Technical Leadership

• Lead a team of developers, ensuring high-quality design, development, and delivery of solutions

• Provide architectural guidance and enforce best practices across front-end and back-end development

• Mentor junior/mid-level engineers and support team growth

• Ensure scalability, reliability, and security of solutions

You will:

• Collaborate with the I-Stem Voice AI team and CEO to design, build and ship new agent capabilities
• Develop, test and refine end-to-end voice agent models (ASR, NLU, dialog management, TTS)
• Stress-test agents in noisy, real-world scenarios and iterate for improved robustness and low latency
• Research and prototype cutting-edge techniques (e.g. robust speech recognition, adaptive language understanding)
• Partner with backend and frontend engineers to seamlessly integrate AI components into live voice products
• Monitor agent performance in production, analyze failure cases, and drive continuous improvement
• Occasionally demo our Voice AI solutions at industry events and user forums

You are:

• An AI/Software Engineer with hands-on experience in speech-centric ML (ASR, NLU or TTS)
• Skilled in building and tuning transformer-based speech models and handling real-time audio pipelines
• Obsessed with reliability: you design experiments to push agents to their limits and root-cause every error
• A clear thinker who deconstructs complex voice interactions from first principles
• Passionate about making voice technology inclusive and accessible for diverse users
• Comfortable moving fast in a small team, yet dogged about code quality, testing and reproducibility

• Expert knowledge in WordPress installation, configuration, Administration, security, and optimization.
• Experience with WordPress Theme, Widgets and Plugin customizing and developing new wordpress themes, Plugin modification/development and widgets development.
• Strong understanding and hands-on in HTML, DHTML, XML, CSS, JavaScript, JQuery/Prototype and AJAX.
• Develop high performance, highly scalable, custom development and/or plugin development for WordPress sites
• Experience with parent themes, caching systems (WP Super Cache, W3 Total Cache etc.), HyperDB, Yoast SEO.
• Strong PHP background to implement core WP functions, template tags & hooks in the theme.
• Experience in common third-party APIs (Google, Facebook, ebay etc)
• Very strong understanding of database technologies and SQL Optimization.

• Understand platform requirements & coordinate with the development agency for smooth development of our platform
• Make incremental design or developmental changes on the platform on a regular basis
• Ideate & develop new features on our platform
• Conduct regular testing of website performance & fixing bugs (either through agency or by self, whatever applicable)
• Work with UI/UX designer to implement design systems & user experiences

• Proven experience of 2-3 years as a full-stack developer or similar roles
• Experience in developing scalable desktop and mobile applications
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Knowledge of multiple back-end languages (e.g. C#, Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js)
• Hands on experience with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache)

• You are self-driven, scrappy and entrepreneurial
• You enjoy challenges and are excited to find simple solutions to complex problems
• You put users first
• You're a forever learner
• You want to work in a fast paced (read:messy) startup environment
• You're usually more aware of the hidden hacks & tools of a phone or a computer than most other people
• You like challenges & don't get bogged down by failure easily
• You are firm believer of the quote "if you're not a part of the solution, you're part of the problem"

We're looking to hire expert Laravel developers with strong command over database concepts and preferably, ability to work as a full stack developer utilising Angular/Laravel or Vue as a frontend tech stack. Minimum 4 years experience is required.

As a senior software developer, we expect the following qualifications:

• Has a longer IT technical training in computer science or similar
• Have proven experience JavaScript
• Have proven experience of developing REST-based services
• Have proven experience in PHP and JAVA
• Have proven experience in Laravel, Symfony, and Composer
• Have proven experience with CSS, SASS, and HTML
• Proven experience with Vue.js, Angular or React

Personal qualifications:

• You are quick to put you into new tasks and get an overview.
• As a person manages to get support for your suggestions and solutions.
• Your efforts are focused and you take pride in having completed your tasks, which include seen by you adhere to deadlines.
• Your work is characterised by being both structured and systematic which for example is seen in your documentation.

• Key Result Areas

1. End to end ownership in the consumer facing B2C tech team and deliver solutions to solve business problems.

1. Advanced Javascript, CSS, HTML 5, D/XHTML, XML, JSON, DOM Concepts

1. Must have worked on a SPA framework: ReactJS, Node JS, AngularJS or InfernoJS

1. Own the development methodology. Align with the executive team to improve the development process, prioritize projects and manage multiple work streams

1. Extensive Work with open-source technologies and built services architecture as this will prove to be an invaluable asset in building solutions.

1. Lead a team of Software Developers, Server Engineers and QA Engineers, establishing development practices and standards

1. Extensive skill on React JS, Node JS

1. Experience on various PHP frameworks like Cakephp, Laravel, CI etc would be plus

1. Work with scrum teams and product managers using agile methodologies to deliver high quality solutions on time
2. Jumping on a call with clients to understand the requirement and profile them the right solution, helping formulate an effective solution and turning it into a working application
3. Conducting website performance and unit tests
4. Heavy involvement in the requirements gathering, development and operational stages of new projects
5. Troubleshoot and debug related application defects with existing and new applications
6. Work collaboratively with the frontend team and other team members, train other members and get trained if required

The ideal candidate is a self-motivated, multi-tasker, and demonstrated team-player. You will be a lead developer responsible for the development and management of two of our customer facing websites. You should excel in working with scaling applications and frameworks.

The core skillset required is:

* Wordpress (inbuilt functions, theme and architecture level understanding)

* PHP

* MySQL

* HTML5 / CSS3

* Javascript (and related frameworks/libraries)

* Git

* RESTful APIs

Responsibilities

• Translating designs and functionality into code
• Maintaining dev and live versions of websites
• Writing clean, high-quality, high-performance, maintainable code
• Develop and support software including applications, database integration, interfaces, and new functionality enhancements
• Coordinate cross-functionally with external and internal teams
• Support test and deployment of new products and features
• Participate in code reviews

Qualifications

• Bachelor's degree in Computer Science (or related field)
• 2+ years of relevant work experience
• Expertise in Object Oriented Design, Database Design, and XML Schema
• Ability to multi-task, organize, and prioritize work

Mentorship and Support

* You will work directly with the Co-Founder of the business who will provide direct mentorship both around development as well as (if interested) help you cultivate business-side skills