Senior Back-End Developer – Live Casino / RGS

At buymie we believe it’s all about being personal and attentive. Our mission is to help and improve our customers life by offering convenience and freedom.
Buymie is on a mission to make on-demand grocery delivery simple, fast, and reliable for our customers and retail partners. Our engineering team builds and maintains the platforms that power real-time ordering, picking, and delivery at scale, and quality is central to how we ship.

Your profile
We're looking for a Full Stack QA Engineer to help us maintain and raise the quality bar across our web, mobile, and backend systems. You'll work closely with developers, product managers, and designers throughout the development lifecycle, combining manual testing expertise with the ability to design, build, and maintain automated test suites across the full stack from UI through to APIs and databases.

Job Responsibilities

• Write and execute manual test cases,
• Perform functional, regression, and exploratory testing,
• Develop and maintain automation scripts for both UI and API testing,
• Validate APIs and backend logic to ensure system reliability and data accuracy,
• Execute SQL queries for data verification and validation,
• Integrate automated tests into CI/CD pipelines to support continuous testing,
• Work with QA and development teams to identify areas suitable for automation,
• Ensure consistent and reliable test execution and reporting,
• Report, track, and help resolve defects throughout the development lifecycle,
• Troubleshoot test failures, identify root causes, and communicate results clearly,
• Communicate status to stakeholders and develop reports showing the automation testing status of releases,
• Create and maintain automation documentation and reusable frameworks,
• Contribute to performance and load testing initiatives,
• Create and maintain an automation roadmap and demonstrate progress against it.

Requirements

• BS in Computer Science, Engineering, or a related field, or equivalent practical experience,
• More than 5 years of experience in Software Quality Assurance,
• Hands-on experience with test automation frameworks and tools (Selenium, Playwright, Appium, RestAssured or similar),
• Experience testing web applications, backend services, and mobile applications,
• Solid understanding of API testing principles and tools (REST APIs, request validation, response verification),
• Basic knowledge of SQL for data validation and database testing,
• Programming skills in Java or Python for automation scripting and test development,
• Experience working on multiple projects and/or systems concurrently in a fast-paced environment,
• Experience working with high-volume applications,
• Experience managing test data for reliable automated testing,
• Strong analytical and problem-solving skills,
• Strong written and verbal communication skills,
• Excellent English language skills, both written and spoken.

About Us
Buymie is an online marketplace that connects Customers with personal shoppers in their area, who shop for and deliver items from local stores.

We are a technology company that prides itself on using data-driven knowledge to perfect the online shopping experience for Customers, as well as adapt our Operations and technology to the ever-changing world.

About The Role
We have an exciting opportunity in the real-time, low-latency trading platform space for an efficient, self-directed, core infrastructure developer with a desire to learn new systems and design techniques. In this role, you will design and implement new functionality as well as optimize and troubleshoot the existing system while working with various team members. We offer competitive compensation and excellent benefits.

Responsibilities

• Design, develop, and support core components of the real-time trading platform: market data, order management, exchange connectivity, and execution infrastructure
• Troubleshoot and resolve production issues across a globally distributed trading infrastructure
• Develop and maintain Java and C++ trading systems

Requirements

• 2+ years experience in a front-office trading environment building low-latency systems using Core Java
• Bachelor’s or Master’s degree in Computer Science or related field
• Experience with Network Programming (TCP, UDP), binary protocols
• Experience with Unix/Linux Development
• Experience with multi-threading and lock-free data structures
• Experience with some subset of: Market Data, Order Management System, FIX, Algo Trading, Smart Order Router, DMA, and ITCH
• Ability to work in a fast-paced, dynamic environment

Nice To Have

• Experience with C++
• Experience with Python for tooling, analytics, or data pipelines
• Experience with Grid Computing / Big Data
• Experience with databases (SQL, MongoDB, Redis, or similar)
• Experience with cloud infrastructure (AWS)

Benefits

• Health, visual and dental insurance
• Flexible sick time policy

We are looking for an experienced Senior Full-Stack Developer to join the Development Department in the Live Casino division, based in Yerevan, Armenia. This is a key technical role for a professional who will work across both backend and frontend layers, focusing on system integrations, internal tools, and cross-platform development.

You will cooperate with other developers and architects to ensure seamless communication between different systems, services, and game modules within the Live Casino ecosystem.

We are looking for an experienced Senior Full-Stack Developer to join the Development Department in the Live Casino division, based in Yerevan, Armenia. This is a key technical role for a professional who will work across both backend and frontend layers, focusing on system integrations, internal tools, and cross-platform development.

You will cooperate with other developers and architects to ensure seamless communication between different systems, services, and game modules within the Live Casino ecosystem.

What We Offer

• The opportunity to work on integration and cross-platform development within a next-generation Live Casino ecosystem.
• Collaboration with experienced architects and developers in an international environment.
• A culture of open communication, responsibility, and technical excellence.
• Competitive salary and long-term career growth opportunities.
• The opportunity to work on integration and cross-platform development within a next-generation Live Casino ecosystem.
• Collaboration with experienced architects and developers in an international environment.
• A culture of open communication, responsibility, and technical excellence.
• Competitive salary and long-term career growth opportunities.

Requirements

• 5+ years of professional experience in full-stack or web application development.
• Strong hands-on experience with JavaScript / TypeScript, React, and Node.js.
• Solid understanding of RESTful APIs, WebSockets, and microservices architectures.
• Experience integrating external APIs, payment systems, and game platforms.
• Proficiency in working with SQL/NoSQL databases (PostgreSQL, MongoDB, Redis, etc.).
• Familiarity with CI/CD pipelines, containerization (Docker, Kubernetes), and version control (Git).
• Understanding of frontend performance optimization and backend scalability principles.
• Experience with cloud infrastructure (AWS, GCP, or Azure) is an advantage.
• Fluent in English (working level). Armenian or Russian is a strong advantage.
• 5+ years of professional experience in full-stack or web application development.
• Strong hands-on experience with JavaScript / TypeScript, React, and Node.js.
• Solid understanding of RESTful APIs, WebSockets, and microservices architectures.
• Experience integrating external APIs, payment systems, and game platforms.
• Proficiency in working with SQL/NoSQL databases (PostgreSQL, MongoDB, Redis, etc.).
• Familiarity with CI/CD pipelines, containerization (Docker, Kubernetes), and version control (Git).
• Understanding of frontend performance optimization and backend scalability principles.
• Experience with cloud infrastructure (AWS, GCP, or Azure) is an advantage.
• Fluent in English (working level). Armenian or Russian is a strong advantage.

Responsibilities

• Design, develop, and maintain full-stack applications and integration services across the Live Casino and RGS platforms.
• Build and support internal tools and dashboards for operations, analytics, and monitoring.
• Implement efficient and secure API integrations with external partners and third-party systems.
• Collaborate with backend and frontend teams to ensure consistency and high performance across products.
• Contribute to the development of common UI components and internal libraries.
• Maintain code quality, performance, and scalability across all parts of the stack.
• Participate in code reviews, testing, and continuous improvement of development processes.
• Work closely with the Solution Architect to align technical decisions with business and product goals.
• Troubleshoot production issues and ensure the stability of integrations and internal systems.
• Design, develop, and maintain full-stack applications and integration services across the Live Casino and RGS platforms.
• Build and support internal tools and dashboards for operations, analytics, and monitoring.
• Implement efficient and secure API integrations with external partners and third-party systems.
• Collaborate with backend and frontend teams to ensure consistency and high performance across products.
• Contribute to the development of common UI components and internal libraries.
• Maintain code quality, performance, and scalability across all parts of the stack.
• Participate in code reviews, testing, and continuous improvement of development processes.
• Work closely with the Solution Architect to align technical decisions with business and product goals.
• Troubleshoot production issues and ensure the stability of integrations and internal systems.

Ready to be a Titan?
We're looking for a seasoned technical leader who brings deep expertise, broad systems thinking, and the hands-on drive to take complex ideas from design through delivery. You'll work at the intersection of architecture and execution - shaping the technical direction of company-wide initiatives while staying close enough to the code to make them real.

We power thousands of home and commercial service businesses across the U.S. and beyond, helping them operate more efficiently through a platform that includes ML and AI-driven scheduling, dispatch automation, and real-time operational workflows. We're quality-minded, embrace modern engineering practices, and believe the best solutions come from engineers who are as invested in the craft as they are in the outcome. If that's how you think about your work, we'd like to talk.

What You'll Do
Own & Deliver:
Define the technical vision for your domain, plan 18+ months ahead, and see it through - writing code, leading implementation, and taking end-to-end accountability for quality and outcomes.

Design & Build:
Produce complete, production-ready system designs and then help build them. You write code and lead others in writing high-quality code. You drive and participate in major architectural decisions relating to scale, reliability, and security, and you're the person who makes those decisions real.

Set the Standard: Be the reference point for engineering excellence. Your implementations, code reviews, and technical decisions serve as the model others learn from. You conduct architecture reviews, identify systemic risks, and introduce improvements that make the entire organization more effective at shipping.

Discover & Generalize:
Proactively identify opportunities to extract shared systems, define reusable patterns, and establish approaches that eliminate duplication and inconsistency across teams. You prevent the organization from diverging technically and build the foundations others build on top of.

Empower: Coach and mentor Staff and Senior engineers in technical design, architecture, and systems thinking. You create opportunities for others to grow, run cross-team knowledge-sharing sessions, and make the engineers around you demonstrably better.

Shape Strategy:
Partner with engineering leadership on roadmap and resource planning across company-wide initiatives. Surface and advocate for non-functional requirements - scalability, resilience, security, performance - and make sure they are reflected in how teams plan and execute. Align technical direction with ServiceTitan's business priorities.

Recruit & Grow the Team: Assess candidates for senior technical roles, design interview plans, and make hiring recommendations. You help define and uphold the engineering bar.

What You'll Need

• 10+ years of industry experience in large-scale enterprise web or SaaS applications, with 7+ years in senior IC roles designing and building systems used by other engineers at scale
• A proven track record of designing and shipping large-scale distributed systems - not just advising on them
• Deep expertise in at least one primary technology stack (e.g. C#/.NET, Java,C++ or equivalent), with the ability to quickly ramp up on and contribute to any technology in ServiceTitan's stack
• Strong command of distributed systems fundamentals: event-driven architecture, asynchronous programming, concurrency, fault tolerance, and performance tuning
• Hands-on experience with cloud infrastructure (Azure, AWS, or GCP), including architecture, automation, and operational practices
• Solid grounding in data architecture: relational, NoSQL, vector databases, and distributed persistence
• Familiarity with AI/ML systems and LLM-based architectures - including orchestration, retrieval, and agentic patterns - aligned with the direction of ServiceTitan's platform
• Experience leading monolith-to-microservices or service-oriented migrations through to completion
• Strong command of modern engineering practices: Git, CI/CD, containerization (Docker), RESTful services, and observability tooling (e.g. Elasticsearch, DataDog, Prometheus)
• B.S., M.S., or PhD in Computer Science, Engineering, or a related technical field

What You'll Bring

• A bias for execution: you are equally comfortable at the architecture whiteboard and in the codebase, and you hold yourself accountable for both
• The communication skill to make complex technical decisions legible to any audience - engineers, PMs, and leadership alike - in writing and in person
• A coaching mindset: you invest in the engineers around you and consistently leave teams, codebases, and architectures better than you found them
• Breadth across the engineering landscape with deep mastery in at least one area, and the intellectual curiosity to quickly develop credibility in new domains
• A habit of identifying risks, dependencies, and improvement opportunities before they surface as problems - and the ownership to address them
• Strong empathy for end users and a consistent practice of grounding technical decisions in real customer impact

This role operates at a 60/40 split - approximately 60% hands-on technical contribution (coding, code review, technical design) and 40% leadership, strategy, and cross-team influence.
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Be Human With Us:
Being human isn’t about checking every box on a list. It’s about the experiences we have, people we meet, and the perspectives we share. So, if you have the skills but are hesitant to apply because of your background, apply anyway. We need amazing people like you to help us challenge the conventional and think differently about the problems that we’re solving. We’re in this together. Come be human, with us.

Use of AI Technology:
We use technology, including automated and AI-assisted tools, to support certain aspects of our recruitment process. These tools are designed to improve efficiency and enhance the candidate experience. AI tools are not used to make hiring decisions; all hiring decisions are made by our hiring teams.

What We Offer:
When you join our team, you’re not just accepting a job. You’re making a career move. Here’s how we’ll support you in doing some of the most impactful work of your career:

• Flextime, recognition, and support for autonomous work: Flexible time off with ample learning and development opportunities to continue growing your career. We offer a comprehensive onboarding program, leadership training for Titans at all levels, and other programs and events. Great work is rewarded through Bonusly, peer-nominated awards, and more.
• Holistic health and wellness benefits: Company-paid medical, dental, and vision (available to employees and their dependents day 1), parent and siblings’ insurance, wellness benefit, office massage, etc.
• Support for Titans at all stages of life: Parental leave and support, financial planning tools, Employee Assistance Program services, and more.

At ServiceTitan, we celebrate individuality and uniqueness. We believe that the convergence of fresh perspectives and experiences from all walks of life is what makes our product and culture so great. We strongly encourage people from underrepresented groups to apply. We do not discriminate against employees based on race, color, religion, sex, national origin, gender identity or expression, age, disability, pregnancy (including childbirth, breastfeeding, or related medical condition), genetic information, protected military or veteran status, sexual orientation, or any other characteristic protected by applicable federal, state or local laws.