Jobs at Djinni

We are looking for a Tech Lead / Backend Architect to design and guide the implementation of a white‑label platform that enables creators (streamers, bloggers, influencers) to launch their own branded mobile apps for their communities. The platform aggregates content from major social networks and adds messaging, livestreams, and management dashboards.
 

You will own the technical architecture, lead key implementation decisions, and work hands‑on on the most critical backend components. You will closely collaborate with the project manager, product stakeholders, and a small senior engineering team.

Duration: 9-12 weeks, potential extension.
 

Key responsibilities:

• Design the overall backend architecture (multi‑tenant model, security, scalability, API boundaries).
• Define technical approach for integrations with YouTube, Twitch, Instagram, TikTok, X/Twitter, etc.
• Lead implementation of core modules: authentication/authorization, configuration, content, messaging, notifications, moderation, and analytics.
• Establish coding standards, review pull requests, mentor backend and frontend developers.
• Collaborate with DevOps on infrastructure, deployment and monitoring strategy.
• Assess technical risks, propose mitigations, and ensure the MVP is production‑ready.
   

Requirements:

• 5+ years of backend development experience, with at least 2+ years in a lead/architect role.
• Strong expertise with Node.js, TypeScript and NestJS.
• Solid understanding of distributed systems, multi‑tenant architectures and security best practices.
• Experience integrating with third‑party APIs at scale (ideally social media or similar platforms).
• Good knowledge of relational databases (PostgreSQL), caching (Redis), and message/queue systems.
• Experience working with cloud infrastructure (preferably AWS) in production environments.
• Upper‑Intermediate English (ability to lead technical discussions with international stakeholders).
   

Nice to have:

• Experience with real‑time systems (WebSockets, live chat, streaming features).
• Knowledge of GDPR and data protection practices for consumer products.

• Previous work on creator‑focused, subscription, or media platforms.

   

  What we offer:

• Focused 3-month MVP sprint with experienced senior team (2 Backend, Frontend, DevOps, QA, PM)
• Cutting-edge stack: Node.js/NestJS TS, PostgreSQL/Redis, AWS ECS/EKS, React/Next.js
• Real product impact — a platform that launches in App Store for creators' fans
• Long-term potential after MVP (Phase 2+ payments, advanced features per roadmap)

• Remote work, flexible hours, timely payments via contract
   

  We're excited to build something creators will love — let's talk technical vision! 🚀

We are looking for a skilled PCB Designer to join our team. The ideal candidate should have experience in designing printed circuit boards from scratch, making modifications to existing schematics, and optimizing layouts for performance and manufacturability.

Responsibilities:

• Develop PCB layouts from concept to production
• Modify and optimize existing circuit schematics
• Ensure signal integrity and EMC compliance
• Work closely with hardware and firmware engineers
• Prepare manufacturing documentation (Gerber files, BOM, assembly drawings)

Requirements:

• Experience with PCB design software (Altium Designer, KiCad, Eagle, etc.)
• Strong knowledge of electronics and circuit design
• Understanding of PCB manufacturing and assembly processes
• Ability to troubleshoot and improve existing designs
• Attention to detail and problem-solving skills

Nice to Have:

• Experience with high-speed PCB design
• Knowledge of power electronics and RF design
• Familiarity with version control systems for hardware

If you are passionate about hardware development and want to work on innovative projects, we’d love to hear from you!

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.

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.

What we’re looking for

• Fluent in spoken English (В2+, work with US customers);
• Experience from 0,5 year in a relevant position;
• Be flexible with the US schedule. Working hours from 16:00 pm to 00:00 Kyiv Time;
• Ability to prioritize tasks for the team and coordinate multiple projects in a changing environment.

What you’ll be doing

• Full cycle of project management: from participation in pre-sales preparation to the stage of successful implementation/support of the project;
• Prepares a daily, weekly, and monthly plan;
• Work with technical documentation;
• Provide reporting on the progress of tasks and the project;
• Tracking workload, deadlines, and progress on each project’s tasks.

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.

Hiring stages: Recruiter screening → Skills assessment interview → Final culture fit interview.
 

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

We are looking for Site / Product Designer for our music software www.MusConv.com - mobile and desktop version available

( work in Lviv or Kyiv,

remote work possibility ):

About the project:

MusConv is b2c music software which helps people synchronize their playlists and tracks between 125+ music services: Spotify, Apple Music, YouTube Music, Amazon Music, Tidal and others.

We are looking for C# developer for our music software

( work in Lviv or Kyiv,

remote work possibility ):

www.MusConv.com

About the project:

MusConv is b2c music software which helps people synchronize their music between music services: Spotify, Apple Music, YouTube Music, Amazon Music, Tidal and others.

We offer:

Challenging interesting project

Professional growth and development program

Flexible schedule

Team of highly talented individuals

Access to developer courses like https://www.pluralsight.com

Mentor: code reviews, studying( fiddler, postman, asynchronous programming, etc.)

5% of sources is simple gui based on xaml( avalonia similar to wpf )

95% of sources is regular .net standard( backend to interact with different music services )

We are looking for C# developer to implement new features

We are looking for flutter developer for our music software

( work in Lviv or Kyiv,

remote work possibility ):

www.MusConv.com

About the project:

MusConv is b2c music software which helps people synchronize their music between music services: Spotify, Apple Music, YouTube Music, Amazon Music, Tidal and others.

We offer:

Challenging interesting project

Professional growth and development program

Flexible schedule

Team of highly talented individuals

Access to developer courses like https://www.pluralsight.com

Mentor: code reviews, studying

We are looking for flutter developer to implement new features

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.

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.

What we’re looking for:

• Proven experience as a WordPress Developer, with a portfolio of previous projects.
• Proficiency in WordPress theme and plugin development.
• Strong knowledge of PHP, HTML, CSS, and JavaScript.
• Familiarity with responsive design principles.
• Experience working with MySQL or other relational databases.
• Understanding of web standards and optimization techniques.
• Good English communication skills (B1+ level).
• Ability to work collaboratively in a team environment.
• Excellent problem-solving and debugging skills.

• Strong attention to detail and the ability to meet project deadlines.

   

What you’ll be doing:

• Collaborate with design and development teams to create and maintain WordPress websites and applications.
• Customize WordPress themes and plugins to meet client requirements.
• Develop custom functionalities and features using PHP, HTML, CSS, and JavaScript.
• Ensure the security, performance, and scalability of WordPress sites.
• Troubleshoot and debug WordPress-related issues.
• Stay up to date with the latest industry trends and best practices in WordPress development.
   

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 submit it through our website at comeback.ua. Selected candidates will be contacted by Come Back Agency.

Advertiv is a global digital marketing agency offering full-service marketing solutions. A leading digital agency specializing in strategy, brand building & user acquisition using proprietary AI technology for programmatic RTB media buying on dozens of DSPs (both for desktop & mobile). Powered by a team of highly experienced and skilled professionals with a shared passion for marketing & technology, we’ll help accelerate your global online growth with well-defined KPIs.

😎 The Media Buyer Team Lead (Gambling - Facebook) will focus on leading and managing a team of media buyers to develop, execute, and optimize high-impact Facebook advertising campaigns for the gambling sector. This role is pivotal in acquiring new users, driving growth, and ensuring the highest return on ad spend (ROAS) while navigating the complex regulatory environment of the gambling industry. The ideal candidate is a Facebook Ads expert with leadership experience and deep industry knowledge.

📍 Key Responsibilities:

• Team Leadership: Lead, mentor, and develop a team of Facebook media buyers, ensuring campaign objectives are met and team performance is optimized.
• Campaign Strategy & Execution: Develop and implement comprehensive Facebook advertising strategies that align with business goals and the unique challenges of the gambling industry.
• Budget Management: Oversee and manage Facebook advertising budgets, optimizing for ROAS, CPA, and user acquisition while staying within budgetary limits.
• Performance Optimization: Monitor and optimize all aspects of Facebook campaigns, including audience targeting, ad creative, bidding strategies, and placement to maximize performance.
• Regulatory Compliance: Ensure all Facebook ad campaigns comply with regional gambling regulations and Facebook’s advertising policies, maintaining strict adherence to responsible gambling standards.
• Creative Collaboration: Work closely with creative teams to ensure ad creatives are engaging, relevant, and compliant with Facebook’s ad policies.
• Reporting & Analytics: Track and analyze campaign performance metrics (e.g., CTR, CPC, CPM, CPA), generate detailed reports, and provide strategic insights for improvement.
• Facebook Platform Expertise: Stay up-to-date with Facebook’s evolving advertising tools, trends, and best practices to continuously improve campaign results and maintain a competitive edge.
• Vendor Relationships: Manage relationships with Facebook account representatives and other relevant partners to gain access to insights, beta programs, and premium ad inventory.

📍Key Qualifications:

• Experience: Minimum 3+ years of hands-on media buying experience, with a focus on Facebook Ads, and at least 1 year in a team leadership role. Experience in the gambling industry is required.
• Facebook Expertise: In-depth knowledge of Facebook Ads Manager, Power Editor, Facebook Pixel, custom audiences, lookalike audiences, and A/B testing.
• Gambling Industry Knowledge: Thorough understanding of the gambling sector, including regulatory requirements, responsible gambling standards, and advertising restrictions across different regions.
• Technical Skills: Expertise in Facebook's targeting capabilities, dynamic ads, and campaign optimization tools. Familiarity with analytics platforms like Google Analytics and Facebook Analytics.
• Leadership: Proven ability to lead, coach, and inspire a media buying team to achieve performance goals in a fast-paced environment.
• Analytical Mindset: Strong analytical and data-driven decision-making skills, with the ability to translate data insights into actionable strategies.
• Communication Skills: Strong written and verbal communication skills to present performance results and strategic recommendations to senior stakeholders.
• Education: Bachelor’s degree in Marketing, Business, or a related field. Certifications in digital marketing or Facebook Ads are a plus.

📍 Preferred Attributes:

• Proven success in Facebook ad campaigns within the gambling industry, achieving strong user acquisition and ROAS.
• Experience managing high-budget Facebook campaigns in a performance-driven environment.
• Knowledge of Facebook’s ad policies, specifically as they pertain to gambling.

📍 Why Join Us:

• Competitive salary and benefits package.
• Opportunities for professional growth, leadership, and skill development in a dynamic industry.
• Opportunity to work with international companies from various industries;
• Professional and career growth.

📍 The interview process consists of:

• Intro call with our recruiter;
• Interview with the hiring managers.

If you are passionate about media buying and interested in the gambling industry, we would love to hear from you. Join our team as a Media Buyer and play a key role in driving the success of our advertising campaigns.

Apply now to be part of our dynamic team!

Hi there! We’re Onicore — a growing fintech company building user-friendly payment solutions for a global audience.

We are looking for an HR Generalist with a strong focus on recruitment, who is not afraid to take ownership of their decisions and ideas, and is able to work autonomously in a fast-paced environment.

What you’ll do:

— Own the full hiring cycle: from gathering requirements and sourcing candidates to making offers and onboarding.

— Work closely with hiring managers, helping to shape role profiles and hiring strategies.

— Conduct initial HR interviews and provide constructive feedback.

— Build, improve and scale recruitment processes and the hiring funnel, including analytics.

— Support core HR processes: onboarding, documentation, internal policies, and HRM systems.

— Create and maintain a positive candidate and employee experience.

What we expect you to have:

— 3+ years of experience as an HR Generalist.

— Strong focus on recruitment and understanding of the full hiring cycle.

— High level of independence and ownership.

— Strong communication skills and structured thinking.

— English proficiency at Upper-Intermediate level or higher.

— Experience working in IT, product, and/or service companies.

What’s on us:

— Competitive salary and benefits package.

— Opportunities for professional development and career growth.

— Health insurance.

— Remote work with the possibility to visit our office in Kyiv.

— Space to share your ideas and bring them to life.

Is this all about you? Send us your CV!

Client is a top one in automotive sphere. He has a bunch of projects which are related with tools for testing/emulation of IVI part. Part team is in Detroit and part in Ukraine remote. Projects have parts starting from HW boards and completing with SW part.

• Responsibilities:

  Testing Balance: 70% Automation / 30% Manual testing split.
  Embedded automation: actively contribute and evolve existing automation framework (Python).
  Protocols: Hands-on experience with CAN, gRPC, and TCP.
  Embedded Systems: Expertise in hardware flashing and embedded environment interaction.
  OS: Linux knowledge and CLI proficiency.
  CICD: Experience with GitHub Action.
  Test Planning: Define the automation strategy for new features, ensuring high coverage for complex automotive use cases.
  Reporting & Analytics: Build reports to visualize test results, hardware stability metrics.

• Mandatory Skills Description:

  Python: Advanced proficiency to evolve and maintain an existing automation framework.
  Protocols: Hands-on experience with CAN, gRPC, and TCP.
  Embedded Systems: Expertise in hardware flashing and embedded environment interaction.
  OS: Linux knowledge and CLI proficiency.
  CICD: Experience with GitHub Action.

• Nice-to-Have Skills Description:

  Automotive

We’re a web studio building websites and applications, and we’re looking for a designer who can create clean, modern visuals for homepages and app screens. Your work will include website homepage design, inner pages when needed, and application layouts (web/mobile). Please send your portfolio or examples of recent designs (Figma/PSD acceptable), especially homepage concepts and app screen designs. Include your availability, rate, and how much time takes to create a first draft for website home page with 5 page downs. thank you!)

Hi there!
We’re Jett Develops, a digital product design & development agency. We work with early-stage startups and fast-growing companies in FinTech, GreenTech, SaaS, and EdTech. Our work helped clients raise over $20M and build platforms used by Microsoft, Evergrow, and more.

We’re now growing our presence on Upwork — and we’re looking for a curious, detail-oriented person to help us find the right leads and send strong proposals.
No experience needed — we’ll teach you everything step by step!

What You’ll Do

• Monitor new job posts on Upwork using our filters
• Review project details like budget, location, and tech stack
• Choose the right company profile to apply with (we have several)
• Use templates and case studies to create proposals
• Ask the team if you need more info (e.g., technical details or project goals)

• Keep track of your work in our CRM

   

What We’re Looking For

• Solid written English — enough to write clear messages and understand client posts
• Great attention to detail — you actually read what the client is asking for
• Ability to follow instructions (and improve them when needed)
• Curiosity and willingness to learn
• Some basic tech understanding — if you’ve heard of Figma, Webflow or React, that’s already great!

Nice to Have (but not required)

• Experience with Upwork or other freelance platforms
• Knowledge of Google Sheets, Slack, or CRMs
• Background in tech, marketing, or copywriting

What You’ll Get

• Full onboarding and training — we’ll guide you from day one
• Clear step-by-step processes — no chaos, no guesswork
• Daily feedback and support from the team
• Flexible schedule — work when it suits you
• Real growth opportunities — in sales, research, proposal writing, or client communication — based on what you’re best at

How to Apply

Just answer 3 short questions:

1. Why are you interested in this role?
2. How would you rate your English and writing skills?
3. Have you worked with Upwork or other freelance platforms before?

Let’s build something great together.
– Team Jett Develops

Responsibilities

• Build and maintain backend services and APIs using .NET 8+ and C#.
• Design and manage PostgreSQL databases, ensuring data integrity and performance.
• Implement Entity Framework Core for data access and business logic.
• Integrate backend systems with AWS services (EC2, Lambda, RDS, S3, etc.).
• Ensure backend systems are secure, scalable, and maintainable.
• Write clean, testable, and efficient code with proper documentation.
• Troubleshoot, debug, and optimize backend services.
• Collaborate with frontend developers and product team to define APIs.

Requirements

• 2+ years of professional experience with .NET (C#).
• Strong knowledge of Entity Framework Core and RESTful API development.
• Experience with relational databases, ideally PostgreSQL.
• Familiarity with cloud technologies, especially AWS basics (EC2, Lambda, RDS, S3).
• Understanding of authentication & authorization, including OAuth2.
• Problem-solving mindset and attention to detail.
• Ability to work in a remote team environment with good communication in English.

Nice-to-Have

• Experience with Docker and containerized deployments.
• Basic understanding of CI/CD pipelines

We are looking for a Manual QA Engineer to join a mobile product team working on secure, high-traffic mobile applications for iOS and Android. The role focuses on ensuring quality, stability, security, and compliance of mobile applications in a regulated, real-time environment. You will work closely with mobile engineers, backend developers, and product managers to validate complex user flows, integrations, and security-sensitive features.

Work Conditions

Employment Type: Full-time

Work Format: Onsite in Madrid office

Relocation: Madrid, Spain (relocation support provided)

Onsite Requirement: Fully onsite after the first 3 months

Start Date: ASAP

Schedule: Standard business hours

Key Responsibilities

Perform manual testing of mobile applications on iOS and Android platforms

Analyze product requirements, specifications, and designs to create clear and detailed test cases

Execute functional, regression, smoke, exploratory, and acceptance testing

Validate authentication and authorization flows (login, MFA, token handling, permissions)

Test integrations with external APIs, payment systems, and third-party services

Validate real-time features, data synchronization, and state consistency

Perform mobile-specific testing:

• App lifecycle scenarios
• Network interruptions and recovery
• Background / foreground behavior
• Different devices, OS versions, and screen sizes

Identify, document, and track defects with clear reproduction steps and evidence

Collaborate closely with developers to investigate issues and verify fixes

Participate in release testing and support App Store / Google Play releases

Ensure high quality, usability, and stability across production releases

Required Qualifications

3+ years of experience as a Manual QA Engineer, preferably with mobile applications

Strong experience testing mobile apps (iOS and Android)

Solid understanding of:

• Software testing fundamentals and QA processes
• SDLC and STLC
• Bug lifecycle and defect tracking

Experience working with test documentation:

• Test cases
• Checklists
• Test plans

Experience testing REST APIs (using Postman, Charles, or similar tools)

Good understanding of client-server architecture

Ability to analyze logs and reproduce complex issues

Strong attention to detail and analytical thinking

Nice to Have

Experience testing fintech or payment-related applications

Understanding of security-sensitive flows (authentication, authorization, session handling)

Experience with mobile traffic inspection tools (Charles, Proxyman, Fiddler)

Basic knowledge of SQL or databases

Experience working in Agile / Scrum teams

Experience with test management tools (TestRail, Zephyr, Xray, or similar)

Experience with mobile automation (Appium or similar) — as a plus

🚀 DevOps Engineer — Fourmeta

About the role:

Fourmeta is looking for a skilled DevOps Engineer to join our team and support the delivery of high-quality web and mobile products for international clients.

In this role, you will be responsible for building, maintaining, and improving our infrastructure and CI/CD pipelines, ensuring system reliability, scalability, and security.

⚙️ Responsibilities

• Build, maintain, and improve cloud infrastructure on AWS
• Support deployment and delivery processes for web and mobile applications
• Implement and maintain CI/CD pipelines
• Ensure high availability, security, and performance of systems
• Configure and manage Docker-based environments
• Monitor systems using tools like Prometheus, Grafana, Nagios
• Troubleshoot infrastructure and deployment issues
• Collaborate closely with developers and project managers
• Continuously improve infrastructure and DevOps processes

🧠 Requirements

• Strong experience with AWS
• Solid knowledge of Linux systems
• Hands-on experience with Docker and containerized environments
• Familiarity with monitoring tools (Nagios, Prometheus, Grafana)
• Knowledge of VPN protocols
• Good Bash scripting skills
• Understanding of CI/CD concepts and tools (Jenkins, Azure DevOps or similar)
• Awareness of modern DevOps principles and best practices
• Strong problem-solving skills and attention to detail

🌟 Nice to Have

• Previous experience in a similar DevOps role
• Experience working in remote teams
• Experience with Infrastructure as Code (Terraform, CloudFormation, etc.)
• Knowledge of Kubernetes

🎁 What we offer

• 18 days of paid vacation
• 6 paid sick days per year
• Compensation for sports and fitness activities
• Flexible remote work format
• International projects and professional growth
• Friendly and transparent team culture
• Opportunity to work with modern cloud technologies

Language requirements
English — B2 (Upper-Intermediate) or higher

About Fourmeta
Fourmeta is a web-studio based in London, UK.
For many years, we have been creating and improving digital products for companies worldwide: websites, landing pages, mobile apps, web apps, e-commerce platforms, and interactive solutions.

We are your full-stack design and development team. You have the idea — we’ll make it happen.