Jobs at Djinni

This role is ideal for an experienced Python engineer who is confident working with AI-driven workflows, building reliable backend services, and contributing to modern LLM-powered systems. You will focus on developing MCP-based integrations and backend APIs while collaborating with a senior-level engineering team.

Your responsibilities will include:

• Build and maintain Python-based MCP services and integrations.
• Develop backend APIs for LLM-powered products using FastAPI or FastMCP.
• Work on prompting, tool integration, reliability, and production readiness of AI workflows.
• Design, build, and maintain scalable and reliable backend systems.
• Collaborate with cross-functional teams to deliver high-quality technical solutions.
• Participate in improving system performance, stability, and maintainability.
• Expand into modern LLM infrastructure and evaluation practices as needed.

What we expect from you:

• English level B2 or higher for effective technical communication.
• Strong hands-on experience with Python.
• Solid experience with MCP and prompting concepts.
• Proven backend engineering experience with FastAPI or similar frameworks.
• Experience designing and maintaining APIs and backend services.
• Proficiency with Git and standard version control workflows.
• Strong problem-solving skills and ability to work independently.
• Experience working in distributed teams within the EU time zone.
   

Nice to Have:

• Exposure to Kubernetes.
• Understanding of embeddings and evaluation (evals) workflows.
• Familiarity with LLM inference concepts such as temperature, top_p, guardrails, and bias mitigation.
• Experience working with AI-driven or LLM-based systems.
• Experience with production-grade infrastructure and scalable services.

What we offer:

• Interesting projects and challenges that accelerate professional and personal growth.
• Long-term project.
• 15 paid vacation days per year.
• 5 paid sick leave days per year.
• Flexible, results-focused schedule; hybrid work or remote (office with city view + work from home).
• Comfortable, stylish office in Kyiv with generator/battery backup.
• Equal salary, medical insurance, trial period.
• Team-building events: parties, online activities, picnics, and more.
• Opportunity to work in a Top-employee company (DOU 2025).

We are seeking a passionate and skilled Full-Stack JavaScript Developer with at least 5 years of experience to join our team. The ideal candidate will have strong expertise in React, Node.js, PostgreSQL, and AWS to build scalable, efficient, and user-friendly applications. 

Requirements 

• Minimum of 5 years of professional experience as a Full-Stack JavaScript Developer or similar role 
• Strong proficiency in React and Node.js 
• Hands-on experience with PostgreSQL or other relational databases 
• Knowledge of AWS services (EC2, S3, Lambda, RDS, etc.) 
• Understanding of RESTful APIs and web services 
• Familiarity with version control systems like Git 
• Good problem-solving skills and attention to detail 
• Excellent communication skills and ability to work independently or in a team 
   

Nice-to-haves 

• Experience with TypeScript 
• Knowledge of CI/CD pipelines 
• Familiarity with Docker and containerization 
• Previous experience working in agile development environments 

Core Responsibilities 

• Develop, test, and maintain new and existing web applications using React and Node.js 
• Design and optimize database schemas using PostgreSQL 
• Integrate front-end components with server-side logic and APIs 
• Deploy, manage, and scale applications on AWS cloud infrastructure 
• Collaborate with cross-functional teams to define technical specifications and deliver high-quality solutions 
• Ensure code quality through testing and code reviews 
• Stay updated with emerging technologies and industry best practices 
   

What we offer   

• Continuous learning and career growth opportunities 
• Professional training and English/Spanish language classes   
• Comprehensive medical insurance 
• Mental health support 
• Specialized benefits program with compensation for fitness activities, hobbies, pet care, and more 
• Flexible working hours 
• Inclusive and supportive culture 

About Us
 

We are a U.S.-based fintech platform founded in 2021, focused on modernizing and digitizing the lending and payments ecosystem.
 

We operate a multi-lender lending platform and are expanding into payments and financial infrastructure. Our roadmap includes complex underwriting workflows, multi-party application flows, role-based systems, API-driven integrations, and money movement infrastructure.
 

We’re looking for a Senior Full Stack Developer who thrives in backend-heavy fintech systems and can build scalable, secure, API-driven architecture while supporting front-end development as needed.
 

If you enjoy solving real-world financial logic problems, integrating complex third-party systems, and building structured, high-impact platforms — this role is for you.
 

What You’ll Be Doing
 

Backend (Primary Focus)

• Designing and building scalable backend services using PHP (Laravel)
• Developing and maintaining RESTful APIs for internal and external integrations
• Implementing complex business logic related to:
  • Loan origination workflows
  • Offer presentation and decisioning logic
  • Funding and settlement flows
  • Payments and money movement
  • Role-based permissions and application assignment
• Integrating with third-party APIs including lenders, payment processors, and financial systems, with a strong emphasis on loan origination platforms, core banking systems, and complex partner integrations
• Designing clean database architecture in MySQL
• Writing optimized queries and ensuring data integrity
• Implementing secure authentication & authorization (JWT, OAuth, role-based access)
• Handling asynchronous processes, webhooks, queues, and background jobs
• Writing unit and integration tests for backend services
• Refactoring legacy code for scalability and maintainability
• Participating in architectural discussions and technical planning
   

Frontend (Secondary Support)

• Supporting development in React.js
• Building and maintaining API-connected UI components
• Working with existing design systems and UI structure
• Ensuring proper state management and API consumption
• Debugging cross-stack issues (frontend ↔ backend)
   

System & Infrastructure Responsibilities

• Working within AWS infrastructure (EC2, RDS, S3, IAM, etc.)
• Understanding deployment workflows and environment separation (dev / staging / production)
• Collaborating with DevOps on CI/CD pipelines
• Ensuring performance, security, and monitoring standards are met
• Supporting system scalability and uptime
   

Fintech-Specific Responsibilities

• Building and maintaining systems that handle:
  • Sensitive PII (SSNs, EINs, banking data)
  • Loan calculations and APR logic
  • Funding disbursement and reconciliation
  • ACH/card payment processing logic
  • Status-driven workflows (multi-stage application lifecycle)
• Working with or building loan origination systems (LOS) and multi-lender workflows
• Implementing and optimizing underwriting logic, decisioning flows, and application state management
• Supporting document parsing, data extraction, and AI-assisted workflows within financial applications
• Designing systems that support dynamic application flows, conditional logic, and configurable lending programs
• Ensuring compliance-conscious development (data protection, auditability, traceability)
• Supporting webhook-driven external lender responses and state updates
   

What We Expect

• 5+ years of experience in backend or full stack development
• Strong experience with PHP (Laravel framework required)
• Experience with React.js
• Strong experience with MySQL database design and optimization
• Experience working within AWS environments
• Strong experience integrating external APIs (REST required), especially complex multi-party or financial integrations
• Experience working in fintech, lending, payments, or financial platforms (strongly preferred)
• Experience working with loan origination systems, underwriting workflows, or similar financial platforms
• Familiarity with AI-assisted workflows, document parsing, or structured data extraction systems is a strong plus
• Strong understanding of:
  • Secure coding practices
  • Authentication & authorization models
  • API-driven architecture
  • Webhooks & async processing
• Ability to debug complex cross-system issues
• Experience working in structured Jira-based sprint environments
• Clean, maintainable coding standards
   

Nice to Have

• Experience with financial calculations (APR, amortization schedules, payment schedules)
• Experience with queue systems (Redis, SQS, etc.)
• Experience building role/permission matrices
• Experience working with high-volume transactional systems
• Experience improving legacy systems in production environments
   

What Success Looks Like in This Role

• You take ownership of backend features from specification to production
• You anticipate edge cases in financial logic
• You build integrations that are resilient and well-structured
• You reduce technical debt, not increase it
• You proactively identify architectural risks before they become issues
• You communicate clearly with Product, BA, and DevOps teams
   

What We Offer

• Fully remote work
• Transparent and competitive compensation
• High-impact role in a fast-growing fintech platform
• Direct involvement in architectural decisions
• A team that values ownership, precision, and execution
• 20 paid vacation/sick days per year
   

Working Hours

This role is aligned with U.S. Eastern Time to support live production systems and real-time platform operations.
Standard schedule: Apx 10am-7pm / Extended support shift 7pm-2am
Provides strong overlap with U.S.-based operations, product, and support workflows

FFW Agency is looking for a Strong-Mid/Senior PHP developer to join our team.

Required skills

- 3+ years of hands-on development experience

- Solid knowledge of PHP (Drupal, Laravel, Symfony)

- Commercial project experience with Laravel

- Experience with SQL and noSQL databases

- OOP

- Design patterns

- Hands-on experience in Web Services development

- Solid understanding of Git and CI

- Upper-Intermediate level of English or above

- Ability to both collaborate with team members and to work independently.

As a plus

- TypeScript knowledge

- AWS knowledge

- Python experience

- Knowledge of JavaScript(Vue.js or React)

- HTML5, CSS3 and SASS

We offer

- Competitive salary

- Support for conferences, courses and certifications

- Health insurance

- English language school

- Paid holidays (4 weeks) and sick leave

About FFW Agency (Dnipro)

We are a global team of inspired people collaborating across 11 countries, together with the aligned purpose of creating powerful digital experiences for some of the world’s most notable brands. We are passionate about empowering our clients to harness the full opportunity of digital to create best-in-class experiences for our clients and those they serve. We judge our success by our collective hard work's impact on our clients’ businesses.

Required skills

• 3+ years of experience in support of software applications or products
• Analytical and troubleshooting skills
• Strong ability to locate and describe the problem, attentiveness to the details
• Ability to effectively communicate technical information in non-technical terms
• Great teamwork skills
• Strong desire to be always helpful
• Experience with Jira, Confluence, ServiceDesk
• Upper intermediate English level

As a plus

• Understanding of UX/UI principles
• Basic knowledge of HTTP protocol and REST API

Responsibilities

• Provide the 2nd line of application product/technical support for our customers
• Identify, analyze and troubleshoot product issues and provide our customers with effective solutions
• Defect management through the operational flow
• Collaborate with development team in improving and clarifying documentation and collaterals for error troubleshooting, infrastructure maintenances and custom development
• Help building and improving the process allowing for a smooth, simple and fast integration for our customers
• Document common support cases in the company’s knowledge base
• Provide feedback on the efficiency of the customer service process
• Help the customers to configure our product up to their business needs
• Eliminate all the reasons that might make customers leave

We offer

• Ability to work on interesting and complex product
• Ability to impact product roadmap
• Working schedule: Mon-Fri, starting from 9am CET
• Competitive salary according to qualification (PE setup)

If you want to develop, initiative and result oriented, our company is waiting for your resume.

Our client is a leading global Financial market data provider who runs a change program aiming to migrate a set of legacy data connectors to a new strategic platform. The main driver is to deliver high-quality software that connects Financial Markets across the globe in a real-time, high frequency, and low-latency data management chain. The projects are technically challenging in an environment that is very engaging. Projects will utilize a multitude of different languages and skillsets with a focus on C++ and scripting languages.

We are looking for a C++ software engineer/developer with experience in implementation backend systems and services running under Linux, Cloud, ideally, with capabilities to deliver projects independently and coordinate work with BA, QA, Operational, and cross-functional application teams.

• Responsibilities:

  • Develop high-quality software, design, and functional documentation
  • Provide estimates for specific software feature implementation
  • Identify, prioritize, and execute tasks in the software development life cycle
  • Build unit tests for your code
  • Automate tasks through appropriate tools and scripting
  • Perform validation and verification testing
  • Collaborate with internal teams and vendors to fix and improve products
  • Ensure software is up-to-date with the latest technologies and standards

• Mandatory Skills Description:

  • 3+ years of full life-cycle software development experience
  • 3+ years of object-oriented development, in particular, C++
  • Experience developing under Linux
  • Ability to collaborate in a team-focused environment
  • Excellent analytical skills and a real passion for solving problems
  • English at the level of Upper-Intermediate (spoken)
  • Experience with Docker, AWS

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 Python Backend Developer to join a distributed team building and maintaining production software for US-based clients. You will work on real systems, collaborate directly with client stakeholders, and contribute to AI-enabled solutions in a long-term engagement.

What you will do:

• Build and maintain web applications using Python, Django, and FastAPI - production code that's clean, testable, and built to last.
• Develop backend systems, integrate third-party APIs, and support frontend teams with reliable endpoints.
• Work with AWS infrastructure: S3, Lambda, EC2, EventBridge, DynamoDB.
• Implement security measures and handle data protection thoughtfully.
• Debug production issues, optimize performance, and keep systems running smoothly.
• Follow industry trends and bring new ideas to the table when it makes sense.

What we are looking for:

• Proven Python experience - real projects you've shipped, not just learned.
• Strong command of Django or FastAPI (ideally both).
• Solid grasp of OOP principles, design patterns, and how to apply them in practice.
• Hands-on experience building RESTful APIs and integrating web services.
• Comfortable working with relational databases (MySQL, PostgreSQL) and NoSQL (DynamoDB).
• English communication skills - B1 level.
• Ability to solve problems independently, write clear code, and communicate well with teammates.
• Takes responsibility for their work and doesn't need constant oversight.

Nice to have:

• Experience with AI prompting.
• Familiarity with LangChain or LangGraph.

Hiring stages: Recruiter screening → Test assignment → Skills assessment interview → 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 through our website at comeback.ua. Selected candidates will be contacted by Come Back Agency.

Our team is working for one of the world's largest providers of products and services for the ever-evolving needs of the energy industry. Oil and gas domain, well logging.
We are working with Azure cloud, GIT, Kubernetes, using C#, C++ last standards (C++ 17, potentially 20). Using SCRUM framework.

• Responsibilities:

  • Review and analyze tasks in Product Backlog Items provided by Product owner
  • Participation in grooming sessions and proactive task requirements and acceptance criteria clarification
  • Work as part of a team using Azure environment
  • Work with the team on development and resolving issues
  • Implement software changes from Product Backlog Items and technical requirements
  • Work with the QA team to determine if the application fit Product Backlog Items and technical requirements
  • Identify and fix bugs, find solutions to the problems
  • Maintain code quality, organization, and automatization
  • Maintain the developed software efficiently through a solid knowledge of software lifecycle

• Mandatory Skills Description:

  • 4+years of experience and strong knowledge in C/C++
  • Some experience and .NET/C# knowledge
  • Environment and tools: Docker, GIT, CMake, WCF
  • SOA, Microservices, Solid principles, DDD
  • Experience with databases (SQL)
  • Problem-solving, proactive in task clarification, analytical thinking
  • SCRUM framework knowledge and understanding of SDLC
  • English level: Intermediate+
  • Ability to work effectively in a team and with international clients

• Nice-to-Have Skills Description:

  • gRPC
  • Kubernetes
  • Multithreading knowledge
  • PowerShell scripting
  • Azure cloud
  • Oil and Gas domain knowledge

Luxoft, a DXC Technology Company, is a digital transformation services and software engineering firm providing bespoke IT solutions that drive business change. In financial services we deliver complex projects with highly skilled engineering talents. If you would like to help us build engineering solutions that make difference for our global financial industry clients, this may be your opportunity. We are looking for C# engineers with experience in scalable system designs, to join the team developing a firm-wide Risk platform for our client US multinational investment bank. Working in this project will let you:
- learn more about financial markets, products and risks.
- verify and grow your skills in global diverse team.

• Responsibilities:

  - Design and develop software components for Equity Risk Platform built on C# and C++
  - Coordinate efforts with local developers and wider global team.
  - Do scalability and performance optimizations.
  - Manage the software development life cycle, from planning and prioritizing to testing and release.
  - Review, test and debug team members' code
  - Document development phases
  - Identify and analyze user requirements.
  - Selection of the most suitable solutions for creating a product
  - Compliance with deadlines

• Mandatory Skills Description:

  - 4+ years of hands-on experience using .Net technology stack and providing high-quality solutions.
  - Solid core .Net, multithreading, concurrency, design patterns.
  - Experience with SQL
  - Ability to apply modern security protocols and best practices.
  - Good delegation and time management skills
  - Problem-solving abilities
  - The ability to prove their point of view to the customer.
  - Excellent communication skills

• Nice-to-Have Skills Description:

  - C++ knowledge
  - Investment Banking experience

GTM Engineer (Outbound Systems & Growth Automation)

Location: Remote

About the Role

We’re looking for a highly technical and growth-minded GTM Engineer to design, build, and optimize scalable outbound engines. This role sits at the intersection of growth, sales, and engineering—focused on creating multichannel systems that drive pipeline through intelligent automation and high-quality data.

You’ll be responsible for architecting outbound workflows across LinkedIn, email, and messaging platforms, leveraging data, signals, and modern tooling to reach the right prospects at the right time.

Key Responsibilities

• Build and scale multichannel outbound systems (LinkedIn, email, messaging platforms)
• Design automated workflows for prospecting, sequencing, and follow-ups
• Develop data pipelines using web scraping and enrichment tools
• Identify and integrate high-quality buying signals into outbound campaigns
• Optimize deliverability, personalization, and conversion rates across channels
• Experiment with new tools, channels, and automation strategies to improve performance
• Collaborate with sales and growth teams to align outbound efforts with GTM strategy

Requirements

• Proven track record of building and scaling outbound engines across multiple channels
• Strong experience with web scraping and data extraction techniques
• Hands-on experience with data enrichment and signal-based prospecting
• Proficiency with tools like Clay (or similar platforms) for workflow automation and enrichment
• Solid understanding of outbound infrastructure (domains, inboxes, deliverability, sequencing)
• Analytical mindset with a focus on testing, iteration, and performance optimization

Nice to Have

• Experience using AI tools like Claude for outbound personalization and workflow automation
• Familiarity with alternative enrichment and automation tools beyond Clay
• Experience working closely with sales teams in B2B environments

What We Offer

• Competitive compensation
• High ownership and autonomy in building GTM systems
• Opportunity to work on cutting-edge outbound and growth strategies
• Fast-paced, experimentation-driven environment

Join the Data Engineering team to contribute to the ongoing maintenance and improvement of an internal LLM-powered assistant that uses hosted LLM APIs and internal knowledge sources, with a focus on reliability, retrieval quality, and operational excellence.

• Responsibilities:

  • Maintain and enhance ingestion/enrichment pipelines for internal content (parsing/extraction, normalization, metadata enrichment, deduplication, and quality monitoring)
  • Improve indexing and retrieval performance and quality (chunking/segmentation refinements, embedding/index update workflows, metadata filtering, caching) and support hybrid retrieval capabilities (vector + keyword/BM25 + metadata)
  • Implement and maintain access-aware retrieval by propagating/enforcing document permissions through indexing and query-time filters, including audit logs and validation tests
  • Improve source attribution so responses reliably point to the correct documents and sections in a consistent format.
  • Extend and harden tool/workflow execution and automations (scheduled/trigger-based), including retries, timeouts, idempotency, concurrency controls, and run history
  • Develop and maintain evaluation and regression testing (golden sets, automated scoring) and support structured comparisons across LLM providers/models as required
  • Operate the platform in production: observability (logs/metrics/tracing), alerting, incident support, performance tuning, and cost controls, plus runbooks and handover documentation

• Mandatory Skills Description:

  8+ years of hands-on experience in Data Science and 5+ years in Machine Learning, with a proven track record, demonstrated through a robust portfolio of projects.
  Strong programming skills in languages such as Python and familiarity building ETL pipelines.
  Expertise in SQL and experience with both relational (preferably Postgres) and NoSQL databases (Open Search or Elastic Search)
  Familiarity with cloud platforms (e.g., AWS) and their services.
  Experience with version control systems (e.g., Git) and CI/CD pipelines.
  Ability to build scalable infrastructure to embed and search very large number of documents.
  Ability to move fast in an environment where things are sometimes loosely defined and may have competing priorities or deadlines.
  Expertise in ML inference optimizations
  Solid experience with Hybrid RAG, chunking/segmentation refinements, embedding/index update workflows, metadata filtering, caching, etc.
  Knowledge of network optimization for distributed ML training and inference.
  Understanding of distributed training patterns and checkpointing strategies.
  Strong English skills (B2 and higher)
  Strong verbal and written communication skills.
  Ability to work independently and collaborate in a group.

• Nice-to-Have Skills Description:

  Agile certification
  AWS/Oracle/Microsoft attestations and certifications
  Domain knowledge - Trading and Capital Markets

Remote 
Working Hours: Aligned with EST calling hours (flexibility required, occasional shifts up to 8:00 PM CET)

About the Role

We’re looking for a proactive and driven Sales Development Representative (SDR) to join our team. This role focuses heavily on outbound prospecting, especially cold calling, to generate qualified opportunities for the sales team. You’ll be the first point of contact for potential customers and play a key role in building our pipeline.

Key Responsibilities

• Conduct outbound prospecting through cold calls to generate new business opportunities
• Engage and qualify leads through meaningful conversations
• Identify customer needs and position relevant solutions
• Maintain accurate records of interactions in CRM systems
• Collaborate with the sales team to ensure smooth handoff of qualified leads
• Meet and exceed daily/weekly activity and pipeline targets

Requirements

• Proven experience in cold calling and outbound sales
• Strong conversational English skills (clear, confident, and engaging communication)
• Experience working with or targeting the US market
• Ability to handle objections and navigate conversations effectively
• Self-motivated with a results-driven mindset
• Comfortable working flexible hours aligned with EST time zones

Nice to Have

• Experience with LinkedIn outreach and social selling
• Experience running email outreach campaigns
• Familiarity with CRM tools and sales engagement platforms

Working Hours

• Primary focus on US (EST) calling hours
• Workday is not entirely call-heavy, but flexibility is required
• Occasional schedule adjustments up to 8:00 PM CET

What We Offer

• Competitive compensation (base + performance incentives)
• Opportunity to grow within a fast-paced sales environment
• Supportive and collaborative team culture

🚀 About the Project

Our client is rebuilding their core technology stack with a strong focus on Azure cloud infrastructure and .NET backend services.

Engagement model: Long-term outstaff collaboration

!Only for candidates located in Europe!

Your Responsibilities:

• Design, develop, and maintain backend data services using .NET and Azure;
• Build and maintain REST APIs for frontend interaction and external system integration;
• Participate in architectural discussions, technical documentation, and code reviews;
• Develop modules for managing production jobs, tasks, and floor instructions;
• Integrate with Microsoft Azure services and external platforms;
• Write unit and integration tests, maintain code quality;
• Work closely with the product team, business analysts, and QA engineers in an Agile environment;

• Participate in sprint planning, task decomposition, and estimation.

   

Required Skills & Experience:

• 4+ years of strong commercial experience with .NET backend development;
• Solid hands-on experience with Azure cloud infrastructure;
• Strong problem-solving skills in backend data processing and system optimization;
• Good communication skills and ability to work in a collaborative environment;
• Experience with MS SQL Server and writing efficient SQL queries;
• Solid understanding of RESTful API design principles;

• Upper-Intermediate English or higher — you’ll communicate directly with the client.

   

👉 What we offer:

📈 Professional Growth opportunities:

• Ambitious goals and interesting projects;
• Regular & transparent performance review and feedback process;
• Possibility for both vertical or horizontal growth (in case you want to try a different path).

🎁 Benefits program

• 18 working days of fully paid vacation;
• Free tax reporting support by our Financial department;
• Help with individual entrepreneurs’ questions and accounting support;
• Financial support and additional days off for various occasions (e.g. marriage, childbirth, etc.);

😌 Comfortable Working conditions

• Flexible working hours;
• Provision of required equipment;
• Remote working model.

Senior Java Engineer (Java + VoIP/WebRTC)

Required:

Senior Java Engineer, English B2+

Full-time, EU/Eastern Europe working hours

Location: Ukraine, Armenia, Poland, Eastern Europe

Duration: Long-term

Project Overview

A real-time communication platform requiring high-performance backend services, low-latency architecture, and deep integration with VoIP/WebRTC infrastructure and mobile applications.

Responsibilities

Design and develop high-performance backend services using Java and Spring Boot

Build and maintain real-time communication systems (WebRTC, VoIP, SIP)

Integrate backend systems with mobile applications (iOS & Android)

Work with streaming, signaling, and media servers

Ensure low-latency, high-availability architecture

Collaborate with cross-functional teams (mobile, frontend, DevOps)

Optimize system performance, scalability, and reliability

Requirements (Must-have)

5+ years of experience with Java (Spring / Spring Boot)

Strong experience with WebRTC protocols and architecture

Strong experience with VoIP / SIP / RTP / signaling servers

Experience integrating with iOS and Android applications

Solid understanding of real-time data streaming

Solid understanding of distributed systems and microservices architecture

Experience with cloud platforms (AWS / GCP / Azure)

Familiarity with Kafka / WebSockets / REST APIs

Nice to Have

Experience with Twilio, Agora, Vonage or similar RTC platforms

Experience with media servers: Kurento, Janus, FreeSWITCH, Asterisk

Knowledge of AI/voice processing / speech analytics

Background in telecom or communication products

Tech Stack

Java, Spring Boot, WebRTC, VoIP/SIP/RTP, Kafka, WebSockets, REST, AWS/GCP/Azure, Microservices

Hiring Process

Intro call

Technical discussion

Offer

Start: ASAP

We are looking for a Middle/Strong Middle Full Stack Developer who actively uses AI-assisted development as a core productivity tool and enjoys building and improving real products in close collaboration with a client. 

This role is ideal for a developer with a startup/product mindset, who sees AI not as a replacement for engineering skills, but as a multiplier for speed, experimentation, and delivery quality. 
You will work on completing and enhancing a web application initially built with Lovable, using React, TypeScript, and Supabase, and collaborating directly with an English-speaking client. 

Responsibilities: 

• Actively use AI-assisted development tools (Cursor, GitHub Copilot, etc.) as a core part of your daily workflow to accelerate development and problem-solving 
• Complete and enhance a web application started with Lovable, maintaining and evolving the existing codebase 
• Build responsive and performant React applications using modern patterns and best practices 
• Design, implement, and maintain Supabase backend (database schemas, authentication, real-time features) 
• Write clean, maintainable TypeScript code, reviewing and refining AI-generated outputs 
• Integrate third-party APIs and services efficiently 
• Collaborate closely with the client to clarify requirements and deliver fast, iterative solutions 
• Participate in code reviews, ensuring quality, readability, and maintainability of AI-assisted code 
• Debug, optimize, and improve application performance 
• Stay up to date with modern AI development tooling and share practical insights with the team 

Requirements: 

• Hands-on experience using AI coding assistants (Cursor, GitHub Copilot, or similar) in commercial or real product development 
• Strong interest in AI-assisted development and willingness to actively use AI tools in daily work 
• 2+ years of commercial React experience 
• Solid understanding of React hooks, context, and modern component patterns 
• Experience with Supabase or similar BaaS platforms (Firebase, Appwrite, etc.) 
• Proficiency in TypeScript 
• Experience with responsive design and modern CSS approaches (Tailwind CSS is a plus) 
• Understanding of REST APIs and real-time data synchronization 
• Confident use of Git and common workflows 
• Upper-Intermediate English or higher (direct client communication) 
• Ability to work independently, take ownership, and make pragmatic technical decisions 
• Problem-solving mindset with a focus on delivery and impact, not just perfect architecture 

Nice to Have: 

• Experience with Lovable or other AI-powered development platforms (v0, Bolt, Replit Agent) 
• Experience comparing and choosing between different AI coding tools 
• Knowledge of PostgreSQL and basic SQL optimization 
• Experience with Supabase Edge Functions 
• Familiarity with testing tools (Jest, React Testing Library, Playwright) 
• Experience with deployment and CI/CD (Vercel, GitHub Actions) 
• Basic understanding of UI/UX principles 
• Participation in AI, startup, or indie-dev communities 

We Offer: 

• Innovation Culture: Work in a team that actively experiments with AI and modern development approaches 
• Real Product Impact: Direct collaboration with a client and influence on product decisions 
• Flexible Work: Remote work or a modern office in Kyiv 
• Generous Time Off: 20 paid vacation days + 15 sick leave days annually 
• Professional Growth: Compensation for courses, certifications, and learning resources 
• Cutting-Edge Tools: Access to premium AI tools (Cursor Pro, GitHub Copilot, etc.) 
• Supportive Environment: Collaboration, trust, and focus on outcomes rather than micromanagement 

Recruitment Process: 

1. HR Interview 
2. Tech&Final Interviews  
3. Job Offer 

If you have any questions or need clarifications, feel free to reach out to our Talent Hunter Team by email.