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Welcome to our company, where innovation meets expertise. We're not just another startup; we're a dynamic and rapidly expanding company driven by seasoned leaders in the world of fintech and Ecommerce. Our passionate team is on a mission to tackle one of the most pressing issues plaguing online businesses today: chargeback fraud. This insidious menace all too often results in substantial losses, both in revenue and profits. Join us on our journey as we revolutionize the fight against chargeback fraud. Who We're Looking For - The Dream Maker Were looking for an Office and Operations Manager to join our team and be the backbone of our daily operations. This person will create a smooth, efficient, and positive workplace experience, while also supporting cross-functional workflows across the whole organization and executive coordination. If you're proactive, highly organized, and thrive in a fast-paced environment, this role is definitely for you. Your Arena Full ownership of all aspects of our Israeli office - end-to-end management of the office, including vendors (cleaning services, maintenance, suppliers, etc.), equipment, facilities, and overall office operations.
* Take full responsibility for ensuring the office runs seamlessly on a daily basis, with strong attention to detail and a deep understanding of all office needs.
* Manage complex operational workflows, including food orders, supplier coordination, and ongoing vendor relationships, ensuring high-quality service and efficiency.
* Create and maintain a productive, welcoming, and well-functioning work environment aligned with our team culture.
* Lead company events from A to Z - from initial planning and creative concept to execution and post-event follow-up.
* Manage and track office and welfare budgets, ensuring smart allocation of resources and cost efficiency.
* Support day-to-day company operations including onboarding/offboarding, travel coordination, expense tracking, Happy Hours, and internal documentation.
* Work closely with HR, finance, and IT to support process execution and ensure nothing falls through the cracks.
* Assist senior leadership with scheduling, meetings, and ad-hoc project coordination.
* Follow up on cross-functional action items and ensure project alignment across teams.

We are looking for a backend engineer who can design, build, and operate highly reliable Node.js services on AWS that enable generative‑AI capabilities across our products and internal workflows.
You will create scalable APIs, data pipelines, and serverless architectures that integrate large‑language‑model (LLM) services such as Amazon Bedrock, OpenAI, and open‑source models, enabling teams to safely and efficiently leverage generative AI.
What Youll Actually Be Doing
Design and implement REST/GraphQL APIs in Node.js/TypeScript to serve generative‑AI features such as chat, summarization, and content generation.
Build and maintain AWS‑native architectures using Lambda, API Gateway, ECS/Fargate, DynamoDB, S3, and Step Functions.
Integrate and orchestrate LLM services (Amazon Bedrock, OpenAI, self‑hosted models) and vector databases (Amazon Aurora pgvector, Pinecone, Chroma) to power Retrieval‑Augmented Generation (RAG) pipelines.
Create secure, observable, and cost‑efficient infrastructure as code (CDK/Terraform) and automate CI/CD with GitHub Actions or AWS CodePipeline.
Implement monitoring, tracing, and logging (CloudWatch, X‑Ray, OpenTelemetry) to track latency, cost, and output quality of AI endpoints.
Collaborate with ML engineers, product managers, and front‑end teams in agile sprints; participate in design reviews and knowledge‑sharing sessions.
Establish best practices for prompt engineering, model evaluation, and data governance to ensure responsible AI usage.

This is not just a managerial role- its a chance to lead a high-impact team building core products at scale. As Engineering Manager, youll be a technical leader, a team builder, and a strategic partner.
Youll guide your team to deliver performance, scalable, and secure software solutions, while shaping culture, structure, and product direction. From technical design to org design, youll have a direct influence on how we work ad what we build.
Youll work closely with Product, Architecture, and cross-functional teams to turn ambitious ideas into clean, production-ready code - while creating an environment where engineers grow, thrive, and do their best work.
What Youll Actually Be Doing:
Be both a highly technical contributor and an effective people leader
Hold your own in technical discussion, be a subject matter expert in a product domain, and have strategic influence Lead team(s) that deliver on multiple projects of increasing dependencies in an ambiguous or high-impact area
Work with your team and cross functional partners to define and influence strategy
Drive roadmap creation and execution
Collaborate with various functions, drive engineering initiatives and have an impact at an organizational level
Mentor, coach, and grow your direct reports - championing career development and engagement
Own recruitment, onboarding, and performance management for your team
Influence engineering-wide culture, org design, and cross-functional collaboration

Were looking for a skilled and curious Back End Developer to join our growing engineering team.
In this role, you'll architect and build reliable, scalable services that power mission-critical fintech products - from payments and lending to compliance and blockchain.
You'll collaborate closely with product, DevOps, and front-end engineers to design robust APIs, implement clean data flows, and solve complex performance challenges.
Your work will shape how money moves securely across our infrastructure and directly support millions of users.
This is a great opportunity to drive meaningful impact while learning and growing within a highly supportive and technical team.
What Youll Actually Be Doing:
Design, develop, and deliver scalable software modules and components
Build backend systems using .NET, DotNet 6.0, SQL Server, RabbitMQ, Docker and AWS
Plan, triage, and prioritize work across multiple priorities
Share your knowledge with teammates and help mentor and guide partners

Were looking for a sharp and experienced Senior QA Engineer to ensure the reliability, accuracy, and performance of our most critical system - COS.
In this role, youll be embedded in a fast-paced product team, designing and executing manual and automated test plans that cover everything from backend APIs to customer-facing applications.
Youll take ownership of quality from day one - helping build a scalable testing culture, mentoring junior engineers, and working closely with developers and product managers to catch issues before they hit production.
If you're passionate about high standards and building quality into every stage of the SDLC, this ones for you.
What Youll Actually Be Doing
Own QA strategy and execution for your squad - both manual and automated testing
Design comprehensive test plans and maintain detailed, reproducible test cases
Develop and expand automated test suites for APIs, web apps, and backend systems
Work closely with Developers, Product, and DevOps to shift-left and integrate testing early
Track, triage, and follow through on bugs with clarity and urgency
Help build a culture of quality through documentation, metrics, and knowledge sharing