Jobs at Djinni

We are looking for a proactive, organized, and ambitious junior team member who wants to grow in IT sales. This is a great opportunity for those looking to enter the technology industry, learn quickly, and build a career in sales.

Responsibilities:

• Monitor new incoming leads (both inbound and those generated by our team);
• Enter all relevant contact and lead data into the CRM system (Pipedrive);
• Send initial emails to leads and assign them to appropriate sales team members;
• Participate in team sales communications with potential clients;
• Plan next steps and schedule follow-ups for leads;
• Remind sales representatives of their scheduled tasks (daily/weekly);

• Work in Pipedrive CRM based on given instructions — create lead lists based on specific criteria, re-engage lost contacts, and send follow-up emails.

   

Requirements:

• English — upper-intermediate or better;
• Basic understanding of the IT industry;
• Confident in using Google Docs and Google Sheets;

• Strong communication skills and a fast learner.

   

Would be a plus:

• Knowledge of other foreign languages;
• Sales experience in other fields;
• Experience with any CRM systems;

• Experience using LinkedIn for professional purposes.

   

WE OFFER:

• Fully remote work in a high proficiency team;
• Long-term employment, the average duration of work of our employees is 5+ years;
• Сonvenient working hours for every employee;
• 17 days of annual paid vacation and holidays;
• 10 days of paid sick leaves, without a doctor’s statement;
• Free online English classes for all employees.

Applefy - Premium Mobile and Web Development company, is looking for a talented Python Developer to join our dynamic team on an ongoing project.

This is a fantastic opportunity for a developer passionate about building high-quality software solutions and wanting to grow their skills in a flexible and supportive environment.

What We Offer:
• Flexible work schedule: Manage your own time and work at your own pace.
• Fully remote: Work from anywhere in the world.
• Comprehensive leave policy: Enjoy all official holidays, 20 days of paid vacation, and 10 sick days without needing a doctor's note.

Key Requirements:
• Strong communication skills
• Proficiency in spoken English
• 3+ years of experience with Python
• ML / AI experience
• Experience handling image/video generation workflows
• At least two years of experience in product development
• Solid understanding of UI/UX principles
• Keen attention to detail
• A desire to learn and grow professionally

Preferred Qualifications:
• MacBook (ARM processor) & iPhone owner
• Residency in Ukraine 🇺🇦

If you're ready to take the next step in your career with Applefy, we'd love to hear from you!

Role Overview
 

We are seeking a Game Designer responsible for gameplay design, user experience, and visual quality of playable ads.
 

In this position, you will design gameplay systems, prepare structured Game Definitions, and ensure that playable ads provide engaging and intuitive user experiences.
 

You will collaborate closely with developers, QA, and other cross-functional teams to make sure designs align with client objectives, technical limitations, and quality expectations.
 

Key Responsibilities
 

Gameplay, UX & Creative Direction
 

• Take ownership of gameplay design, UX, and overall creative vision of playable ads, ensuring clarity and engagement within format constraints.
   
• Define core gameplay mechanics, interaction loops, and UX principles while maintaining consistency across projects.
   
• ​Ensure the intended player experience is preserved throughout development.
   

Game Definitions & Validation
 

• Convert client briefs and campaign needs into clear, structured, and implementation-ready Game Definitions.
   
• Establish gameplay direction, interaction flows, and the core experience based on requirements.
   
• Maintain accuracy in documentation to reduce unnecessary revisions.
   

Design During Production
 

• Ensure final implementations reflect the intended gameplay, UX, and artistic vision.
   
• Review playable builds and provide feedback to maintain alignment with design goals.
   
• Support development teams with clarifications and adjust documentation when technical constraints arise.
   

Cross-Team Collaboration & Impact
 

• Guide production teams to ensure proper implementation and consistent design quality.
   
• Help teams understand the reasoning behind design decisions to minimize recurring issues.
   
• Support work with complex or design-sensitive projects when needed.
   
• Develop and document workflows that improve processes and ensure proper use of AI tools within design standards.
   

Requirements

• Solid experience as a Game Designer in mobile games or playable ads.
   
• Proven track record in designing playable ads or user acquisition gameplay experiences.
   
• Strong understanding of gameplay systems, UX, and engagement mechanics.
   
• Experience creating structured design documentation (Game Definitions / GDD).
   
• Experience collaborating with cross-functional teams (development, QA, production).
   
• Strong communication skills and ability to guide teams on design direction.
   
• Fluent English (both written and spoken).
   

Benefits

• Define quality standards for AI-driven creative workflows in a fast-growing industry.
   
• Join a global team where innovation meets artistry.
   
• Grow toward creative direction and leadership roles in visual production.

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.
 

Role Overview 
This role is focused on supporting the recruitment process across the company, with an emphasis on technical hiring. You will take ownership of the early stages of the candidate pipeline, from processing incoming applications and evaluating their relevance to proactively sourcing talent for open positions. Your goal is to ensure a steady flow of qualified candidates ready for the first interview with the hiring manager. We're scaling fast, so the ability to independently identify and engage the right people is critical. 
 

Key Responsibilities

• Process and evaluate incoming applications, assessing candidate relevance against specific role requirements and team needs.
• Proactively source candidates through LinkedIn, GitHub, job boards, professional communities, and other channels.
• Build and maintain a structured candidate pipeline, ensuring no qualified applicant falls through the cracks.
• Collaborate closely with HR manager and hiring managers to understand position requirements, team dynamics, and ideal candidate profiles.
• Qualify candidates and move them through the pipeline up to the first stage with the HR manager.
• Maintain accurate records in the ATS, tracking candidate status, feedback, and communication history.
• Research market trends, salary benchmarks, and competitor hiring activity to inform recruitment strategy.

Qualifications

Must-Have

• Sourcing – hands-on experience with Boolean search, LinkedIn Recruiter, X-Ray search, and other sourcing techniques to find passive candidates.
• Screening – ability to review CVs and applications quickly and accurately, matching candidate experience to technical role requirements.
• Technical understanding – enough familiarity with IT, DevOps, cloud, and software engineering terminology to evaluate candidate profiles without a deep technical background.
• Communication – strong written English skills for candidate outreach, follow-ups, and internal coordination.
• Tools – experience working with ATS platforms (Greenhouse, Lever, BambooHR, or similar) and sourcing tools.
• Organization – ability to manage multiple open roles simultaneously, prioritize tasks, and maintain a clean pipeline.
• Independence – comfortable working autonomously in a fast-paced, remote-first environment with minimal supervision.

Nice-to-Have

• Experience hiring for technical roles in startups or the MSP/cybersecurity industry.
• Familiarity with open-source communities and how to engage contributors as potential hires.
• Experience with recruitment analytics and reporting.

Why Join Flamingo?

• High-impact role: Be the first point of contact for future team members and directly shape the growth of the company.
• Innovative Tech Stack: Work alongside engineers building cutting-edge AI, security, and cloud technologies.
• Remote-first Culture: Flexibility to work from anywhere while collaborating with a top-tier team.
• Mission-Driven Company: Join a team passionate about disrupting the MSP industry and making enterprise-grade security and IT automation accessible to all.

Ready to level up your career?

Playtech‘s POP (Playtech Open Platform) Team is looking for a proactive Product Operations Engineer Intern with strong investigation skills.

Your influential mission. You will...

• Process internal and external customers' requests and issues
• Make investigation of user complaints by application logs analysis and finding solution based on existing documentation
• Collaborate with partners and stakeholders through ticket systems and emails
• Apply application configuration changes
• Support deployment, verification and testing processes

Components for success. You...

• Have technical education and mindset with attention to details
• Possess intermediate or higher proficiency in English, both written and spoken
• Demonstrate clear and well‑structured verbal and written communication
• Are able to analyze application and system logs
• Bring strong troubleshooting and investigation skills
• Have a basic understanding of network communications and protocols, including HTTP(S), TCP/IP, DNS, firewalls, and load balancing

You'll get extra points for...

• Experience with visualization tools such as Kibana and Grafana
• Familiarity with Linux command line interface
• Experience in L2 production application support
• Experience with CI/CD tools and processes, including Git, Jenkins, Argo CD
• Programming/scripting on one of programming languages

Thrive in a culture that values...

• Possibility to work with a product company
• Personalised professional growth
• Warm and friendly attitude to every specialist
• Educational possibilities
• Competitive salary and benefits
• Medical insurance
• Fully-equipped cosy office space located in the city centre (Gulliver, “Palats Sportu” metro station)
• Paid vacation days, sick leaves and national holidays
• Corporate events and team buildings

POP (Playtech Open Platform) TEAM

Playtech Open Platform provides a unified network and API for communication with the Playtech infrastructure, enabling client-side implementation by independent developers. It is an adapter between systems, and it can deliver a more accessible and seamless integration between gaming provider services and operator systems.

Playtech is an equal opportunities employer. Our mission is to welcome everyone and create inclusive teams. We celebrate differences and encourage everyone to join us and be themselves at work.

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

Role Overview:

As a C/C++ Developer, 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

Qualifications:

Must-Have

• Strong proficiency in C/C++ with experience writing system-level or low-level software.
• 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/concurrent programming.
• Attention to security, performance, and code maintainability.
• Experience with Rust.

Nice-to-Have

• Experience migrating or integrating C/C++ codebases with Rust.
• 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).

Why Join Flamingo?

• High-impact role: Build the foundational layer of Flamingo’s open-source infrastructure.
• Ownership & Equity: Competitive salary plus meaningful stock options in an early-stage startup.
• Modern Tech Stack: Rust, NATS, async, cross-platform tooling, the best of systems and cloud engineering.
• Remote-first Culture: Flexibility to work from anywhere while collaborating with a world-class team.
• Mission-Driven Company: Help us redefine how MSPs operate with open-source, automation, and AI at the core.

Ajax Systems is a full-cycle company working from idea generation and R&D to mass production and sales. We do everything: we produce physical devices (the system includes many different sensors and hubs), write firmware for them, develop the server part and release mobile applications. The team is distributed among 2 offices in Kyiv and Lviv, all technical and product decisions are made locally.

Ajax already released and continuously improves Malevich OS, which is a heart of our Hub’s. Now we are looking for Embedded Engineers who are ready to make our system better with us. For us never could be enough: there are still a lot of new functionality, sensors, features to make our system even cooler.
 

Required skills: 

- Excellent knowledge of embedded coding techniques, interfaces (e.g. SPI, I2C, UART, CAN, RS485) and subsystems

- Strong skills in various build systems.

- Excellent knowledge of C programming language

- Understanding of operating systems: embedded developers usually need experience in programming in embedded Linux or similar embedded operating systems

- Good hands-on experience of software engineering fundamentals such as testing, continuous integration, continuous deployment, pull requests and code reviews, source control, work item/issue tracking.
 

Would be a plus:

- Experience with MCU's, e.g STM, ESP, AVR, NRf etc

- Scripting languages Python, Bash

- Basic electronics: embedded engineers use oscilloscopes, logic analysers, and multimeters for debugging
 

Responsibility zone: 

- Participate in the full embedded software life cycle: design, implementation, code reviews, documentation, testing and validation

- Analysis and systematic problem solving for SW reported issues

- Cooperate with electrical engineers to perform verification of new hardware from software team perspective. Review and provide feedback on the firmware specific aspects of hardware design

- Delivery highly reliable Malevich OS releases

- Work with high-level and technical requirements for research and development new features

- Create unit and functional tests
 

With us you will enjoy:

- Working with a team of people to build the future of an industry.

- Gain commercial experience with on-site support from  experienced team members

- Non-trivial challenges and various specter of interesting tasks.

- A flexible, friendly and collaborative work environment.

- Corporate culture based on common sense.

Ajax Systems is an international technological company and Europe’s largest security system manufacturer. In addition, the company offers solutions for video surveillance, smart homes, fire detection, and flood prevention. The product portfolio includes 280 wireless and wired devices for security and automation. Today, Ajax protects over 4.5 million users in 187 countries worldwide. 

We are looking for a smart, experienced, and technically proficient Senior Java Developer to join our team in Kyiv office.

Required Experience:

- Java: 5+ years of professional backend development in enterprise environment
- Kotlin: Knowledge and practical work experience
- Java Concurrency: Strong understanding and practical application experience

Architecture & Design
- Understanding of SOA, microservice, and event-driven architecture
- Cloud development principles with practical AWS experience
- Ability to scale and ensure high availability of loaded systems

Technologies & Tools

Required:

- Kafka, MongoDB, NATS
- Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
- Docker and Kubernetes (containerized applications)
- Git, Gradle, Jenkins
 

Nice to Have:
- Redis, Netty, Akka, gRPC, Project Reactor
 

We offer:
- The opportunity to share and implement your own ideas that could impact products and production
- Work with a motivated team and an environment with a zero-bullshit culture
- Competitive salary
- Medical insurance
- Corporate English classes

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. 

Role Overview

As a Senior Back-end Engineer (Java) at Flamingo, you will design and develop scalable, high-performance back-end services and APIs using Java and Spring Boot. You will be responsible for implementing event-driven microservices, optimizing system performance, and ensuring high availability as we scale our platform. Your expertise in processing high-volume logs and integrating multiple data sources will be critical to building a robust and efficient system.

Key Responsibilities

• Design and develop scalable backend services and APIs using Java (Spring Boot).
• Architect and implement event-driven microservices with Kafka and RabbitMQ.
• Process and analyze high-volume logs efficiently to ensure scalability and real-time insights.
• Integrate and manage multiple data sources, including SQL, NoSQL, and streaming data.
• Optimize database performance using PostgreSQL, Redis, and Elasticsearch.
• Implement authentication and authorization mechanisms with OAuth, JWT, and Keycloak.
• Collaborate with front-end and DevOps teams to build a seamless and resilient system.
• Ensure code quality through automated testing, CI/CD pipelines, and best engineering practices.

Qualifications

Must-Have:

• 5+ years of experience in backend development with Java and Spring Boot.
• Experience in microservices architecture, including event-driven systems (Kafka, RabbitMQ).
• Strong knowledge of RESTful APIs, GraphQL, and WebSockets.
• Experience processing high-volume logs and working with log management tools (ELK stack, Loki, Fluentd, OpenTelemetry).
• Experience working with multiple data sources, including relational (PostgreSQL) and non-relational (Redis, Elasticsearch) databases
• Experience with containerization (Docker, Kubernetes) and cloud platforms (AWS/GCP).
• Understanding of security best practices in backend development.

Nice-to-Have:

• Experience with functional programming in Java or Scala.
• Familiarity with distributed tracing (e.g., Jaeger, Zipkin) for microservices.
• Knowledge of cloud-native architectures and serverless frameworks.
• Exposure to message queues and event sourcing.

Why Join Flamingo?

• High-impact role: As a back-end engineer, your contributions will directly shape Flamingo’s product and technology.
• Ownership & Equity: Competitive compensation, including significant equity in an early-stage, high-growth startup.
• Innovative Tech Stack: Work with cutting-edge open-source technologies in AI, automation, and security.
• Remote-first Culture: Flexibility to work from anywhere while collaborating with a top-tier team.
• Mission-Driven Company: Join a team passionate about disrupting the MSP industry and making enterprise-grade security and IT automation accessible to all.

We are looking for an experienced full-stack developer to join a project building an AI productivity platform that helps professionals learn and stay current in their field.

Requirements:

• 5+ years of full-stack development experience
• Strong Python backend skills (FastAPI, Flask, or Django)
• Frontend experience with Vue.js or React, TypeScript
• Experience with AI/LLM APIs (OpenAI, Anthropic, etc.)
• RAG pipelines and vector databases (Pinecone, Qdrant, pgvector, Weaviate)
• PostgreSQL, database design
• API integrations and backend design patterns

• Strong documentation and communication skills

   

Nice to have:

• LangChain, LangGraph experience
• Multi-agent AI systems
• Knowledge graphs, Neo4j

Conditions:

• 30+ hours per week
• Long-term engagement (6+ months)
• Must be available for standups before 11am Pacific time (7 pm Kyiv)

It’s an excellent opportunity for emerging talent seeking a unique experience in helping grow international companies, brands, and relations across the US,UK and EU.
 

This is an execution-first junior role for a marketer who wants to grow into a T-shaped professional. You’ll help us validate and launch multiple micro-bets: shipping content, campaigns and improving marketing efficiency, launching content and ppc campaigns, working to promote the next gen products.
 

Responsibilities

• Research competitors, customer pain points, keywords, and search intent for digital products.
• Write strong marketing copy for landing pages, Google Ads, lead magnets, emails, articles and outreach sequences. 
• Create and improve landing page content with a clear focus on conversion.
• Distribute articles, informational content about the selected product. 
• Launch, manage, and optimise Google Ads campaigns. 
• Build simple acquisition funnels around clear offers and customer pain points.
• Track campaign performance and improve results based on data.
   

Requirements

• Good written English (using AI or similar tools).
• Good communication techniques, basic marketing hooks and funnels, and negotiation skills.
• Good keyword research skills and understanding of search intent.?
• Practical experience with Google Ads campaign setup, copywriting, and optimisation.
• Ability to create effective landing page content for lead generation and customer acquisition.
• Ability to write outreach sequences for email, LinkedIn, or similar channels. Comfortable using AI tools such as ChatGPT to support research and content creation.
• Organised, proactive, and able to work independently. 
• Perfect with time management and task prioritisation, disciplined, and focused - must.
• Be motivated to meet expectations, learn under tight hours, and deliver excellent results over the expected time.
   

What you’ll get

• Opportunity to work anywhere, as soon as the time zone matches the policy.
• Access to bespoke technology, infrastructure, knowledge, and expertise.
• Participate in life-changing projects dedicated to international partnership, brand development, government relations, public appearances, etc.
• Focus on the international market, innovative AI, FinTech, and startup investments.
• A front-row seat to venture building - from insight capture to decks, pre-seed, V1, and go-to-market.
• Coaching, playbooks, and exposure to investor-ready practices (clean structures, data rooms, crisp metrics).
• Fair salary based on the skill level, performance, and results.
• Cash bonuses as a %% of project revenue.
• Trampoline for your future career.
   

Launch United is a digital incubator. We turn privileged market insight into fundable companies fast - validating with capital and signed intent before heavy engineering - and scale them across FinTech, digital SaaS, and Web3. We operate a fast, ethical «insider-to-investable» pipeline and build with a relentless tempo: one tested hypothesis per team per month, default kill unless evidence to commit. HQ in London; operating across the US, Canada, LATAM, UK and EU.

We’re building something very different at PRAI.

This is not a typical job.

This is a chance to work at the edge of AI, media, and attention economy.

About PRAI

PRAI is an AI platform transforming PR and communications.

We’re building AI Employees — systems that:

• generate content

• run outreach

• replace slow, manual work

Now we’re scaling into AI video content — fast, viral, performance-driven.

If you understand where media is going — you’ll get it.

What you’ll do

• Create viral short-form videos (TikTok / Reels / Shorts)

• Use AI tools:

• Sora (or similar)

• Runway / Pika / Kling

• Build clickbait hooks (first 1–3 seconds = everything)

• Turn ideas into high-converting video flows

• Produce content daily (speed matters more than perfection)

• Test → iterate → scale what works

Work format

• Fully remote

• Full-time

• Startup speed (fast, intense, no hand-holding)

• Performance-driven environment

We use Hubstaff for time tracking — we’re focused on output and accountability.

Who we’re looking for

You’re not “just editing videos”.

You:

• understand attention and psychology

• know what makes content go viral

• can produce a lot, not just “perfect”

• move fast and don’t overthink

Mindset

• speed > perfection

• execution > talking

• no excuses, just results

• test aggressively, drop what doesn’t work

Test task

We may ask you to create:

3 short AI-generated videos

→ strong hook

→ clear flow

→ engagement-focused

Why people want to work with us

• You work with cutting-edge AI tools before most people even understand them

• You build real output, not fake busy work

• You move fast and actually see results

• You’re not stuck in corporate nonsense — only execution matters

• If you’re good, you grow very fast with us

In one sentence

We’re building AI-driven content that people can’t scroll past.

APPLY IF:

You feel this is your environment.

Company website:
prai.us

This vacancy requires office attendance in Kyiv

Responsibilities

• Development and support of SPA on ReactJS: web version mobile-first of a high-load application, admin panels for internal use, and marketing pages
• Collaborate with other teams to effectively meet the product and technical needs of the project
• Proactively participate in improvements and existing solutions tuning
• Share expertise and knowledge with your teammates

Requirements

• At least 5 years of commercial experience in development in JS (ES6+)/Typescript
• Strong knowledge of CSS, HTML5, SASS, Jest
• At least 2 years of commercial experience in development in with ReactJS version 16+ (hooks)
• Experience with state management frameworks: Redux and Redux toolkit preferred
• Intermediate English

What we offer:

• International company with several offices in different locations : Tel-Aviv, Kyiv, Warsaw, Limassol.
• Granting an Option;
• A professional environment with great people to work with;
• Competitive salary, performance review;
• Flexible working hours, no one here tracks your work time because our culture is built on trust and cooperation;
• Social package, including sports coverage, elite medical insurance for you and family;
• 20 working days paid vacation and 100% sick leaves coverage;
• Opportunities to make a difference, to develop and grow;
• Regular corporate celebrations, team buildings and fun activities;
• Comfortable office close to the metro station. Our Kyiv office is open 24/7 with all safety and health measures in place.

Come Back Agency supports US software and technology companies by running their hiring process. We work with delivery and leadership teams to define roles, screen candidates, and manage interviews. Successful candidates are hired directly by the company and become part of its team.

Employer information:
This position is with a US-based software company providing custom development and AI implementation for North American clients. The team builds and maintains production software, including AI-enabled systems, and works in long-term client engagements.
Team members operate as part of an internal, distributed team and collaborate directly with client stakeholders.

About the role:

We are looking for a talented Node.js Backend Developer to join our dynamic team. You will be responsible for developing and maintaining server-side logic, defining and maintaining the central database, and ensuring high performance and responsiveness to requests from the frontend. If you’re passionate about building scalable backend systems and have experience with Node.js, Express,Nest,js Sequelize,Prisma, Socket.io, and databases like Redis, PostgreSQL, and MongoDB, we’d love to hear from you!

What you will do:

• Develop, maintain, and improve backend services using Node.js, Express.js, and Nest.js.
• Design scalable and maintainable system architecture for web applications and services.
• Build and optimize RESTful APIs and ensure secure integration with internal and third-party systems.
• Work with PostgreSQL, Redis, and MongoDB for data storage, caching, and performance optimization.
• Implement real-time functionality using Socket.io or similar technologies.
• Develop and support file upload and processing flows using Multer or equivalent tools.
• Implement secure authentication and authorization mechanisms using JWT, OAuth, and role-based access control.
• Apply backend security best practices, including CORS, input validation, error handling, and access control.
• Optimize application performance, reliability, and scalability in production environments.
• Write clean, maintainable, and testable code following best engineering practices.
• Collaborate closely with frontend developers, QA engineers, and product teams to deliver end-to-end features.
• Integrate external APIs, payment providers, cloud services, and other third-party solutions.
• Contribute to the design and development of microservices and distributed systems.
• Use Docker for local development, service orchestration, and deployment consistency.
• Deploy, monitor, and maintain services on AWS or other cloud platforms.
• Participate in code reviews, technical discussions, and architecture decisions.
• Maintain and improve technical documentation for services, integrations, and internal processes.

What we are looking for:

• 2+ years of commercial backend development experience with Node.js.
• English level B2 or higher.
• 2+ years of experience with Express.js and Nest.js in production projects
• Solid experience with Prisma or other ORMs and a good understanding of database design principles.
• Strong knowledge of REST API design, integration patterns, and backend best practices.
• Practical experience with Socket.io or other real-time communication solutions.
• Strong knowledge of PostgreSQL and experience with Redis for caching and performance improvements.
• Working knowledge of MongoDB and understanding when to use relational vs non-relational databases.
• Experience with Docker in development and deployment workflows.
• Good understanding of AWS services such as EC2, S3, Lambda, or similar cloud platforms.
• Solid understanding of backend security practices: JWT, OAuth, CORS, validation, authorization, and secure API design.
• Good knowledge of Git and collaborative development workflows.
• Understanding of microservices architecture, service communication, and scalable system design.
• Strong problem-solving, analytical, and debugging skills.
• Ability to write structured, readable, and maintainable code with attention to quality.
• Good communication skills and ability to work effectively in a team environment.
• Experience participating in code reviews and improving engineering quality.

Nice to have:

• Familiarity with CI/CD pipelines.
• Experience with Kubernetes.
• Exposure to logging and monitoring tools (e.g., ELK, Prometheus).

Hiring stages: Recruiter screening → Technical interview (live coding) → Final culture fit interview.

What We Offer:

• Working hours aligned with US time zones, typically 16:00-00:00 Kyiv time.
• English lessons to support clear and confident communication.
• Paid vacation and sick days.
• Fully remote work.
• Opportunities for professional growth within the team.
• Structured, personalized onboarding to help you ramp up effectively.

Apply with your resume and a short note outlining your relevant experience. You can also send your resume directly through our website at comeback.ua. Selected candidates will be contacted by the Come Back Agency.

Cloud Infrastructure Engineer

About the role:

We are looking for an experienced Cloud Infrastructure Engineer to join a fast-growing digital health product company focused on improving cardiovascular health outcomes.

The product combines applied science and technology to help users better understand and manage their heart health. The solution is already used at scale and continues to grow rapidly, which creates new challenges in infrastructure, scalability, and reliability.

You will play a key role in building, scaling, and securing a modern cloud infrastructure that supports data-heavy and ML-driven systems.

What you will do:

• Build and maintain a production-ready ML pipeline and data lake
• Improve and evolve build automation processes (transition from CI to full CD)
• Design, scale, and secure Kafka clusters running on Kubernetes
• Collaborate with engineering and security teams to improve infrastructure and compliance
• Develop monitoring systems, dashboards, alerts, and internal tools
• Identify and mitigate reliability and security risks in production systems

Tech stack:

Scala, Python, React Native
AWS, Kubernetes, Docker
Kafka, MongoDB, PostgreSQL, Redis
Nginx, ELK, Prometheus
Jenkins and other CI/CD tools

Requirements:

• 5+ years of experience in DevOps / Cloud Infrastructure roles
• Strong production experience with AWS (or another major cloud provider)
• Hands-on experience with Kubernetes and Docker in production
• Programming experience with at least one of: Scala, Java, or Python
• Experience with CI/CD pipelines and automation tools
• Solid understanding of distributed systems and scalable architectures

Nice to have:

• Experience with Kafka (clusters, streams)
• Experience with ML pipelines or data platforms
• Experience with AI-assisted development tools (e.g., Claude Code)
• Experience with monitoring/logging tools (ELK, Prometheus, etc.)

What we are looking for:

• Independent and proactive mindset
• Ability to learn quickly and adapt to new technologies
• Strong ownership and responsibility for infrastructure decisions