Jobs Backend

About Flamingo

Flamingo is revolutionizing the Managed Service Provider (MSP) industry with an AI-driven, open-source platform for IT and security. Our goal is to empower MSPs with automation, optimization, and scalability tools to enhance their operations.

We are now expanding our system layer, developing cross-platform agents and background services written in Rust, designed to operate on Windows, macOS, and Linux environments. These agents form the backbone of our telemetry and device management capabilities across thousands of managed endpoints.
 

Role Overview:
 As a Client Engineer, you'll build reliable, high-performance system services and daemons that power Flamingo's open-source infrastructure for MSPs. You will work closely with backend engineers to design, implement, and optimize cross-platform components responsible for device management, monitoring, and secure data exchange.
 

Key Responsibilities:

• Develop cross-platform agents, daemons, and background services in Rust for Windows, macOS, and Linux
• Work with low-level system APIs and platform-specific tools: Win32 API, LaunchAgents/Daemons, systemd, and more
• Integrate services with backend infrastructure via HTTP, WebSockets, and NATS
• Write secure, asynchronous, and performant Rust code using Tokio, Serde, and Tracing
• Optimize real-time data processing, message handling, and network performance
• Collaborate with backend and platform teams to ensure reliability, observability, and security across deployments
• Contribute to our open-source projects by writing clean, documented, and community-friendly code

Our Stack:

• Language: Rust (1.8x+)
• Core Libraries: tokio, serde, anyhow, tracing, thiserror
• Networking: reqwest / hyper (HTTP), tokio-tungstenite / warp (WebSockets), nats.rs (NATS)
• Platform APIs:
  • Windows – Win32, COM, Registry
  • macOS – LaunchAgents, Daemons, Keychain
  • Linux – systemd, journal, epoll, nix crate
• Tooling: Git, GitHub, cross-platform builds

Must-Have:

• Strong proficiency in Rust, including async programming and ownership concepts
• Experience developing system-level software for at least one major OS (Windows, macOS, or Linux)
• Familiarity with platform APIs (e.g., Win32 API, systemd, macOS Daemons)
• Solid understanding of networking (TCP/UDP, WebSockets, HTTP)
• Experience with multi-threaded and asynchronous programming
• Attention to security, performance, and code maintainability

Nice-to-Have:

• Experience with NATS, message brokers, or real-time telemetry systems
• Experience building cross-platform agents or monitoring tools
• Contributions to open-source projects (especially in Rust)

We are looking for a Junior-Middle Backend Developer to join a fast-growing start-up developing a product for automated lead generation and recruitment outreach.

Responsibilities:

• Day-to-day product implementation.
• Develop integrations with AI (e.g., Perplexity, OpenAI) & 3rd party API (e.g., CRMs).
• Leverage your prompt engineering skills to maximize the outcome.
• Customer discovery. That includes: internal product conversations, as well as joining some customer calls (Maybe not from day one, but definitely later on).

Requirements:

• At least 1 year of experience working in a product company/startup.
• 1-3 years of software development experience.
• Experience with Node.js, TypeScript, JSON, REST API, Git.
• Experience in LLM/RAG, MCP, and AI agent development and prompt engineering.
• Database design and optimization (SQL).
• Development in cloud infrastructure (AWS/GCP/Azure).
• Patterns for asynchronous task processing (RabbitMQ, SQS, or similar).
• Experience with n8n/make will be a great plus.
• Excellent verbal communication skills.
• Excellent English, minimum B2 level.
• Absolutely customer-centric and flexible in a dynamic environment (i.e., fully tolerant of shifting priorities daily).

Job details:

• Full-time.
• Fully remote.
• Long-term.
• B2B contract.
• Start date — ideally ASAP, but negotiable.

What else will you get:

• Learning how a startup grows.
• Direct impact on product and company strategy.
• Deliver value directly to paying B2B clients.
• You will work with the most modern toolset (including Cursor in Agent mode).

The hiring process:

• 30-45 min pre-screen interview with a recruitment manager.
• 30 min call with the client.
• A technical deep-dive interview, most likely with online coding (conducted by the client).

Job Description

6+ years of software development experience with the .NET platform (ASP.NET Core, C#)
Strong experience building and consuming REST APIs (OpenAPI, FluentValidation)
Knowledge of OAuth 2.0 flows is a plus
At least 2+ years of proven experience with Azure Cloud services (Service Bus, Azure Functions, Cosmos DB)
Solid understanding of client-server application design and asynchronous programming
Experience with CI/CD pipelines in Azure DevOps or equivalent tools
Knowledge of containerization (Docker, Kubernetes) is a strong plus
Familiarity with low-code/no-code integrations (Power Apps, Power Automate) is desirable
Experience with Azure ML/AI services, document recognition, or data-driven workflows is an advantage
Proficiency in debugging, refactoring, and clean code design
Strong analytical skills with ability to ramp up quickly in new domains
Good written and verbal communication skills in English (Upper-Intermediate+)

Job Responsibilities

Design and implement cloud-native applications leveraging Azure Functions, Service Bus, and Cosmos DB
Build and maintain microservices and APIs that integrate with multiple systems, including D365 and data platforms
Collaborate with stakeholders to define and negotiate API contracts and ensure reliable system integrations
Implement data processing and workflow services with a focus on scalability, performance, and resilience
Contribute to the design of low-code solutions integrating Azure ML/AI services for automation (e.g., document recognition, intelligent data extraction)
Participate in planning, estimation, and architecture discussions, providing technical guidance
Debug and resolve issues of various complexities across the stack
Work closely with DevOps and QA to ensure CI/CD pipelines, automated testing, and deployment processes are efficient and robust
Follow coding standards and contribute to continuous improvement initiatives within the development team

Department/Project Description

GlobalLogic is searching for a motivated, results-driven, and innovative software engineer to join our project team at a dynamic startup specializing in pet insurance. Our client is a leading global holding company that is dedicated to developing an advanced pet insurance claims clearing solution designed to expedite and simplify the veterinary invoice reimbursement process for pet owners.

You will be working on a cutting-edge system built from scratch, leveraging Azure cloud services and adopting a low-code paradigm. The project adheres to industry best practices in quality assurance and project management, aiming to deliver exceptional results.

We are looking for an engineer who thrives in collaborative, supportive environments and is passionate about making a meaningful impact on people's lives. If you are enthusiastic about building innovative solutions and contributing to a cause that matters, this role could be an excellent fit for you.

We are looking for a Senior Java Engineer to join the Segmentation & Audience Platform project full-time. We are building a real-time Audience Segmentation & Engagement Platform that powers communications, personalization, automation, reporting, and customer engagement across the entire ecosystem.

Your responsibilities will include:

• Design and implement core components of the audience segmentation platform
• Design and evolve a flexible segment definition language supporting complex rules and targeting scenarios
• Build a scalable segment evaluation engine for processing large-scale entity and relationship data
• Support complex nested logical expressions, filtering criteria, and rule evaluation workflows
• Implement relationship-based audience resolution across multiple entity types and organizational hierarchies
• Design and optimize incremental segment recomputation to efficiently process continuous data changes
• Build event-driven audience update and hydration pipelines for near real-time segment accuracy
• Implement segment versioning, governance, auditability, and full lifecycle traceability
• Design low-latency audience resolution services operating at high scale
• Develop materialization and caching strategies for dynamic segments and audience snapshots
• Optimize query execution, system performance, scalability, and operational efficiency
• Design and evolve APIs for audience creation, management, and retrieval
• Collaborate with product and engineering teams to define platform capabilities and architecture
• Ensure reliability, observability, maintainability, and operational excellence of the platform
• Contribute to architectural decisions and provide technical leadership within the team

• At least 5 years of backend engineering experience
• Strong Java development expertise
• Experience building distributed systems
• Experience designing query engines, search platforms, rules engines, segmentation platforms, or analytics systems
• Strong understanding of data modeling and domain-driven design principles
• Experience with event-driven architectures
• Experience designing scalable APIs and backend services
• Strong problem-solving and performance optimization skills
• Experience working with cloud-native architectures
• Ability to drive technical decisions and contribute to system architecture
• Upper-Intermediate+ English level

• Experience with recommendation engines
• Experience with Quarkus
• Experience building Customer Data Platforms (CDP)
• Experience with marketing automation systems
• Experience with audience segmentation or personalization platforms
• Experience with graph-based data models and relationship traversal
• Experience with search technologies such as Elasticsearch or OpenSearch
• Experience with stream processing technologies
• Experience with Google Cloud Platform
• Experience with large-scale analytics systems

• Work at a Top-employer company (according to DOU 2025)
• A strong culture built on empathy, trust, openness, and real care for employees
• Competitive compensation with regular reviews
• Medical insurance
• Personal learning budget and access to top HR tools, platforms, and practices
• Team events and regular team-building activities
• Flexible hybrid work model with an office in central Kyiv

We are looking for an experienced Senior Full Stack Engineer with Java, Python and React experience to join our development team and contribute to the development of a customized AI-driven platform.

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services; and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.

Responsibilities:

• Hand-On full stack development of innovative applications.
• Owning the entire development cycle, including design, architecture, development, and DevOps.
• Working in Extreme Programming methodology with remote pairing.

Requirements:

• BSc in Software Engineering or BS degree in Computer Science.
• 6+ years of experience in the following technologies: Java (must have), Spring.
• 2+ years of experience with Python (must have).
• 2+ years of experience in FE, mainly React (must have), and other modern JavaScript Framework/libraries.
• Experience with LLMs/AI/Prompt Engineering/MCP.
• Experience with Claude.code
• Experience with Data Analytics – big advantage.
• Experience in development in Kotlin – big advantage.
• Experience with Functional Programming and Java Streams.
• Experience with developing a reactive UI (Reactive JS).
• 2+ years of experience in TDD/BDD development in the following frameworks: Junit, Jasmin, Mockito, Protractor/Selenium
• 3+ years of experience in micro-services-based architecture and tools (Spring Boot/Cloud)
• Experience in DevOps development and Jenkins.
• Experience in designing, developing, and deploying cloud/hybrid-based solutions.
• Experience in developing and deploying in Container based environments (Kubernetes, Cloud foundry).
• Familiarity with the following design concepts: micro-services, service discovery, circuit breaker.
• Self-starter with the ability to appropriately priorities and plan complex work in a rapidly changing environment.
• Versatility and capability to switch easily between different tasks and technologies.
• Experience in assessing a broad range of information solutions and products.
• Strong critical thinker with problem solving aptitude.
• Good English - verbal and written.