Senior Full-Stack Headless Developer

We are looking for a Mid
Full Stack Developer (.NET / Angular)
to join an international Ukrainian–Israeli team building a data-driven product for the sports betting industry (African market), with expansion into banking solutions on the roadmap.

Our platform aggregates sports event data from multiple sources, analyzes client behavior, and distributes processed data to end users in real time. It's a fast-moving, automation-heavy environment with growing investment in AI-driven decision-making. This is a primarily frontend-focused position:
~70% Angular / 30% .NET backend.
You'll build and maintain user-facing features while also contributing to backend services that power them.

Responsibilities:

• Develop and maintain backend and frontend services using .NET 5/Angluar 16
• Develop system integrations with third party providers (SMS. email, payment systems)
• Work with MS SQL databases (data modeling, performance optimization, changes management)
• Experience with Agentic.ai
• Participate in system architecture discussions and technical decisions
• Collaborate closely with the Team Lead and development team
• Take ownership of assigned components and ensure their stability in production
• Participate in estimation, planning, and Jira-based workflows
• Be available for paid on-call duty on weekends (emergency response within 1 hour, approximately 1-2 per month)

Requirements:

Technical Requirements:
Must-have

• Angular 16
• Ionic
• .NET 5
• MS SQL
• understanding of backend architecture and data flows
• Experience working in production systems
• English B2+
• Experience with Claude and agentic development

Nice-to-have

• RabbitMQ
• AWS
• Python

We’re looking for an AI Product Engineer to combine product thinking, technical expertise, and AI tools to build solutions that create real business value.

About Us
Kyivstar.Tech is a Ukrainian hybrid IT company and a resident of Diia.City. We are a subsidiary of Kyivstar, one of Ukraine's largest telecom operators.

Our mission is to change lives in Ukraine and around the world by creating technological solutions and products that unleash the potential of businesses and meet users' needs.

Over 600+ KS.Tech specialists work daily in various areas: mobile and web solutions, as well as design, development, support, and technical maintenance of high-performance systems and services.

We believe in innovations that truly bring quality changes and constantly challenge conventional approaches and solutions. Each of us is an adherent of entrepreneurial culture, which allows us never to stop, to evolve, and to create something new.

What You Will Do

• Gather and clarify business requirements directly with stakeholders, challenge assumptions, and define success metrics.
• Translate requirements into clear technical specifications, user stories, data models, and acceptance criteria.
• Design and drive AI agents through prompting, tool/function calling, orchestration, and evaluation to accelerate prototyping and delivery.
• Build MVPs end-to-end, including frontend, backend, APIs, and data, and iterate quickly based on feedback.
• Deploy, monitor, and maintain solutions in production, including CI/CD, observability, and cost/performance optimization.
• Own the full product lifecycle — from an initial idea to a shipped, reliable solution with measurable business value.

Qualifications And Experience Needed

• Proven full-stack development experience, e.g. Python/Node.js for backend and React or a similar frontend framework.
• Hands-on experience building with LLMs and AI agent frameworks such as LangChain, LangGraph, CrewAI, OpenAI/Anthropic SDKs, or equivalent.
• Practical experience with prompt design, RAG, and tool/function integration.
• Ability to independently elicit business requirements and translate them into technical specifications.
• Experience delivering MVPs under tight timelines with a strong ownership mindset.
• Experience with cloud platforms (AWS/GCP/Azure), Docker, and CI/CD pipelines.
• Experience with API design and integration (REST/GraphQL), as well as relational and/or vector databases.
• Strong English communication skills and the ability to work effectively with both technical and non-technical stakeholders.

A plus would be

• Experience with AI agent evaluation and observability tools, as well as guardrails.
• Knowledge of MLOps/LLMOps practices and prompt versioning.
• Familiarity with data privacy and security requirements, including GDPR and similar standards.
• Experience in telecom or large-enterprise product environments.
• Experience taking AI-powered products from an initial business idea through to a production-ready solution.

What You Will Do

• Work in a cross-functional team with analysts, developers & designers to deliver product features.
• Identifying options for potential solutions and assessing them for technical and business suitability.
• Working closely with the Product Manager, Development team, IT, external stakeholders, and end-users to ensure technical compatibility and user satisfaction.
• Analyze requirements, and define use cases and functional requirements for the software.
• Creates and updates functional & technical descriptions of business processes related to supporting, configuration, and maintenance of the solution.
• Perform requirements management, prioritization, traceability, verification, and validation of the requirements.
• Backlog management and facilitation if needed.
• Oversees test implementation, gathers feedback from users, and proposes functional improvements.
• Selection and implementation of the necessary tools, technologies, and techniques.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Job Description
We are looking for a skilled and creative Web & Brand Designer to join our team. In this role, you will take charge of the entire design process, from concept to completion - designing and building visually appealing, user-friendly web experiences. You'll handle a range of design tasks, collaborate closely with team members to ensure projects align with goals, and contribute innovative visual design solutions in a dynamic, fast-paced environment. This position is ideal for a designer who is passionate about web and brand design, thrives in a collaborative setting, has a keen eye for detail, and embraces new trends, tools, and AI without hesitation.

What you'll do

• Lead various design projects from concept to completion, creating design that reaches millions of users every day
• Design and build high-quality websites across our platforms, raising the bar in interactions, layout, and trends - always grounded in user needs and product guidelines
• Develop strong branding concepts and visual languages that feel fresh, cohesive, and intentional
• Create high-quality design assets - typography systems, imagery, motion, and illustration - where every detail is intentional and purposeful
• Conduct deep visual and web research to stay ahead of design trends and set new standards across our products
• Collaborate closely with product, content, and QA teams to ensure designs are not only beautiful but technically excellent - performant, accessible, and responsive
• Contribute to and uphold design quality standards within the team, giving and receiving feedback that elevates everyone's work

Qualifications

• 4+ years of professional web and brand design experience in a professional design environment, with a strong portfolio demonstrating visual excellence and technical execution from concept to launch
• Able to mentor junior designers, iterate fast on feedback, and work closely with design colleagues
• Excellent design skills with high-quality branding and visual language creation abilities
• Proficiency in Figma, Photoshop, Illustrator, and other Adobe Creative Suite applications, with hands-on experience using AI content generation tools (Claude Design, Figma Weave, Brik, Midjourney, or similar)
• Strong understanding of user-centered design principles and responsive design
• A fast learner - self-motivated, highly independent, detail-oriented, and able to find creative and technical solutions in new environments
• Flexible and cross-functional, comfortable working in a fast-paced, dynamic environment
• Proficient in written and spoken English with excellent communication skills
• Hands-on experience with Wix or comparable advanced web platforms (Webflow, Framer, etc.) - a plus
• Motion design and After Effects experience - an advantage
• 3D tools (Blender, Cinema 4D) and HTML/CSS knowledge - an advantage

Additional Information
Why Wix Kyiv Design Hub

You'll be designing for scale - millions of users will use what you make. You'll have creative freedom, a big team of talented designers, and access to one of the most powerful web creation platforms in the world. If you want to make websites that set the bar and actually ship to millions, this is the place.

Do you love turning clean Figma designs into fast, scalable Shopify builds?

In this role, you’re not just coding sections. You are building high-performing Shopify stores that power real eCommerce growth.

If you enjoy solving problems, writing clean code, and shipping projects without being babysat, this is your role.

At Fuelerate, development is not about “just making it work.”

It’s about building clean, scalable foundations that perform under pressure.

We value ownership, speed, quality, and problem-solving.

You’ll thrive here if:

• you fix problems before being asked
• you think logically
• you care about code quality
• you move fast but clean

You will not enjoy this role if:

• you need constant instructions
• you write messy, patch-style code
• you wait for someone to solve problems for you
• you move slowly

We want builders, not task-followers.

This role exists to turn Figma designs into scalable, clean Shopify builds.

You will:

• build full Shopify redesigns from scratch
• convert Figma designs into pixel-perfect Shopify themes
• customize themes cleanly using Liquid and JSON templates
• develop CRO-related test variants
• implement performance best practices
• optimize for speed and technical SEO fundamentals
• collaborate with Designers, PMs, CRO specialists, and QA
• debug efficiently using DevTools
• use AI tools to improve speed and productivity

You’ll work on real client stores.

Your builds must be scalable, logical, and easy to maintain.

To succeed, you must understand Shopify deeply, not just surface-level theme editing.

• Strong Shopify Liquid knowledge
• Deep understanding of Shopify theme architecture
• Solid HTML, CSS, JS
• Experience replicating Figma designs accurately
• Familiarity with Git
• Strong debugging skills
• Understanding of performance and SEO basics
• Agency or multi-client experience preferred

Mid–Senior level or Senior level. Best portfolio wins.

Not a fit if you…

• need babysitting
• avoid solving problems independently
• ship sloppy code
• break things during simple updates
• move slowly without urgency

Why Fuelerate

We are a performance-driven growth partner for Shopify brands.

• fully remote
• real ownership
• no corporate bureaucracy
• fast-moving team
• growth path → Senior Dev → Tech Lead → Head of Dev

If you perform, you grow fast.

Details

Type: Full-time

Trial: 3 months

Reports to: Head of PM & Development

Compensation: $1,700–$2,200/month, based on experience and performance.

Ready to Apply?

Send us:

• your CV or LinkedIn
• Shopify stores you’ve built
• brief explanation of a technical challenge you solved independently

We care about clean builds and strong logic. Show us what you’ve shipped.