Jobs at Djinni

We are looking for a structured and detail-oriented QA to ensure stability, accuracy, and performance in the scraping infrastructure behind our international SaaS platform.
 

This is a fully remote role with direct impact on product quality and reliability. You will work closely with the Spider/Scraper Team Lead and developers to ensure that our data pipelines deliver accurate, consistent, and high-quality outputs across multiple markets.
 

Responsibilities

• Test and validate scraping outputs across different markets
• Identify inconsistencies, bugs, and data quality issues
• Collaborate closely with developers and technical leadership
• Establish and maintain structured QA processes and documentation
• Monitor data accuracy and proactively flag anomalies
• Improve workflows and reduce recurring quality issues
   

You will play a key role in maintaining the integrity of our data systems.
 

Qualifications

• Experience in QA, software testing, or data validation
• Experience working with scraping systems or data-heavy environments (preferred)
• Strong analytical and structured mindset
• Comfortable working with large datasets
• Fluent in English (written and spoken)
• Strong communication skills in a remote environment
   

Preferred qualifications:

• Basic understanding of Python
• Experience with automation testing
• Experience working in SaaS or technology companies
   

We are looking for someone proactive, detail-oriented, and capable of independently identifying risks and improvement opportunities.

Work Setup

• Fully remote position
• Contract / Freelance
• Time zone overlap with Europe required
   

What We Offer

• Work on a mission-critical SaaS platform with international reach
• Direct collaboration with technical leadership
• Real ownership over quality standards and processes
• Flat structure and fast decision-making
• Competitive compensation based on experience
   

Application

To apply, please send:

• CV 
• A brief description of QA systems or environments you have worked with
• Examples of how you have improved quality, reduced errors, or implemented QA processes

We are seeking an experienced Spider / Scraper Team Lead to take full ownership of the scraping ecosystem behind our international SaaS platform.
 

This is a fully remote leadership role with significant responsibility. You will define technical structure, set direction, and ensure that our scraping infrastructure is stable, scalable, and performance-driven. The role combines hands-on technical expertise with team leadership and operational accountability.
 

Responsibilities

• Lead and manage the spider/scraper team, including coordination with QA
• Define and prioritize the technical roadmap
• Ensure system stability, scalability, and performance across markets
• Monitor KPIs and proactively identify and resolve bottlenecks
• Improve architecture, infrastructure, and development processes
• Mentor developers and elevate technical standards within the team
• Take full accountability for scraping operations and output quality
  
   

This role goes beyond writing spiders. You will lead both the technical systems and the people responsible for them.
 

Qualifications

• Strong Python skills and advanced web scraping expertise
• Experience working with large-scale scraping infrastructure
• Deep understanding of proxies, anti-bot strategies, scaling, monitoring, and performance optimization
• Proven leadership experience managing developers or technical teams
• Experience structuring workflows and improving operational performance
• Fluent English (written and spoken)
• Strong remote communication and documentation skills
  
   

We are looking for someone with demonstrated experience leading and scaling technical teams - not a solo contributor without leadership background.
 

Work Setup

• 100% remote
• International team environment
• Open to contract/freelance arrangements
• Required time zone overlap with Europe
   

What We Offer

• Ownership of a critical SaaS infrastructure
• Direct impact on product performance and revenue
• Autonomy and decision-making authority
• Fast execution and flat organizational structure
• Opportunity to expand into broader technical leadership
• Competitive compensation based on experience
   

Application

To apply, please send:

• CV
• A brief description of scraping teams you have led
• Examples of infrastructure you have built, scaled, or improved

Drive finance ERP solutions for complex, high-load digital products

Softsich is a young and ambitious international product tech company that develops scalable B2B digital platforms. We’re looking for an experienced Business Analyst (ERP Finance) to support and develop finance-related ERP workflows within complex, high-volume transactional environments.

In this role, you will work closely with finance, operations, payments, and product teams, translating business needs into clear functional requirements and supporting the development of effective ERP solutions.

Your key responsibilities will include:

• Gather, document, and validate business requirements from stakeholders across finance, operations, payments, and product teams.
• Be responsible for end-to-end financial workflows for high-load transactional products, including operations and finance analytics and reporting.
• Define functional specifications for the Finance ERP system.
• Collaborate with developers, architects, and system integrators to shape requirements, data models, and diagrams.
• Lead stakeholder sessions to map business processes and identify system needs.
• Document system behavior, workflows, data dictionaries, and training materials for ERP end users.
• Stay informed of regulatory, tax, and operational changes that impact financial systems.
  
   

It’s a match if you have:

• Bachelor’s degree in Finance, Accounting, Information Systems, or a related field.
• 3+ years of experience as a Business Analyst with a focus on ERP or finance systems.
• Experience working with high-volume transactional systems.
• Strong understanding of financial controls, reconciliation processes, and compliance.
• Experience designing or working with ERP systems (custom or commercial).
• Familiarity with Agile/Scrum environments and software product life cycles.
• Upper-Intermediate level of English (written and spoken).
  
   

What we offer:

• Flexible schedule and remote format or offices in Warsaw/Kyiv — you choose.
• 24 paid vacation days, sick leaves, and health insurance (UA-based, other locations in progress).
• A supportive, friendly team where knowledge-sharing is part of the culture.
• Coverage for professional events and learning.
• Birthday greetings, team buildings, and warm human connection beyond work.
• Zero joules of energy to the aggressor state, its affiliated businesses, or partners.
  
   

Send over your CV now — we’d love to get to know you better!

Softsich is a young and ambitious international product tech company that develops scalable B2B digital platforms. We are looking for a Backend Java Tech Lead who will take technical ownership of the backend team working with a microservices, high-load architecture.

This role is about leadership, architecture, and responsibility for the technical direction of the platform.

Your key responsibilities will include:

• Lead the backend team technically, ensuring architectural vision and technical standards.
• Design, implement, and maintain high-load, scalable backend services using Java and Spring Boot.
• Drive technical decisions and take full ownership of architectural solutions.
• Ensure high code quality via best practices, reviews, and automation.
• Optimize system performance and reliability across microservices.
• Work with event-driven architectures and distributed systems.
• Mentor developers, support skill development, and foster collaboration.
• Collaborate with cross-functional teams to deliver reliable and scalable solutions.

It’s a match if you have:

• 5+ years of commercial experience with Java (17+/21) and Spring Boot.
• Strong knowledge of the Spring ecosystem: Web, Security, Data, Scheduler, WebFlux.
• Hands-on experience with microservices and high-load architectures, event-driven systems.
• Practical knowledge of CI/CD, containerization (Docker), and deployment to Kubernetes (EKS).
• Solid experience with Apache Kafka (producers/consumers, distributed topics, retry and error handling).
• Experience working with databases: PostgreSQL, MongoDB / AWS DocumentDB, SingleStore.
• Experience in designing and optimizing REST APIs.
• Experience with monitoring and logging tools: Grafana, Prometheus, Micrometer, ELK.
• Experience in technical leadership or mentoring engineering teams.
• Ability to make and own architectural and technical decisions.
• Strong communication skills, teamwork mindset, and analytical thinking.
• English level — Upper-Intermediate.

What we offer:

– Flexible schedule and remote format or offices in Warsaw.

– 24 paid vacation days, sick leaves, and health insurance (UA-based, other locations in progress).

– A supportive, friendly team where knowledge-sharing is part of the culture.

– Coverage for professional events and learning.

– Birthday greetings, team buildings, and warm human connection beyond work.

– Zero joules of energy to the aggressor state, its affiliated businesses, or partners.

Send over your CV now — we’d love to get to know you better!

Welcome to ApexTech 🙌 

We are looking for 🚀 Fullstack Developer 🚀 who enjoys learning, building, and switching between projects. 

Responsibilities: 

● Advanced Backend and Frontend developments (JavaScript / NextJS / ReactJS) 

● Mentor / Coach other team members 

● Code reviews and refactoring 

● Advanced problem analysis and solving in production 

● Bug fixing, follow-up and workaround, identification of pain points in the platform 

● Responsible for the efficiency of all the components in the infrastructure 

● Write technical specifications when needed 

● Automate and Optimize repetitive tasks 

Required skills: 

● 5+ years of experience in JavaScript fullstack development (NodeJS / NextJS / ReactJS) 

● Proficient in building SSR/SSG/ISR web applications. 

● Proficient in building and consuming APIs - Rest / GraphQL 

● Strong knowledge of accessibility (a11y) 

● Strong understanding of SEO best practises, semantic HTML and metadata 

● Familiar with Cloudflare for CDN, caching, security and performance optimizations. 

● Familiar with Cloud DevOps (AWS preferred) 

● Eye for detail and sensitivity for graphics and aesthetics 

● Adaptability and responsiveness 

● Great analytical skills 

● Fluent in English 

● Team-player 

Nice-to-have: 

● Experience with Python Backend Development (Django / FastAPI) 

● Experience with a Headless CMS (like Sanity / Contentful, or Strapi) 

● Experience using Tailwind CSS or CSS-in-JS solutions. 

● Experience using UI libraries (like RadixUI / HeadlessUI / MaterialUI) 

● Exposure to internationalization (i18n) in NextJS 

Interview process: 

1. Intro-call with the Recruiter. 

2. Technical Interview. 

3. Client Interview. 

What do we offer?

 💻 Full remote work and meetings for brainstorming. 

💡Freedom and flexibility. 

🚀A team of top experts and synergy of the entire organization. 

💸Competitive salary. 

🌿 Vacation and sick leaves. 

🙏Therapy sessions with our psychologist. 

📚Budget for professional development. 

💃Corporate events and team building.

What Do We Do?

Madgicx is transforming how eCommerce brands scale their digital advertising through AI-powered automation and intelligent optimization. Our platform empowers thousands of brands to make smarter marketing decisions, automate complex workflows, and achieve unprecedented ROAS. We’re building the future of autonomous advertising, where AI and human creativity combine to unlock exponential growth.

Why Madgicx Needs You

As a Backend Engineer at Madgicx, you are responsible for building and maintaining the core APIs and services that power our AI-driven advertising platform. You will design resilient, high-performance backend systems that handle millions of advertising operations daily, integrate with multiple advertising platforms, and serve as the foundation for our AI agent ecosystem.

This is a hands-on engineering role where you’ll ship production code daily, collaborate closely with AI/ML teams, and directly impact thousands of brands’ advertising performance.

What You’ll Own

1. Core API Development

• Build and maintain RESTful APIs serving web, mobile, and AI agent clients
• Design database schemas and optimize query performance for high-traffic endpoints
• Implement authentication, authorization, and rate limiting for secure API access
• Write comprehensive tests (unit, integration, E2E) ensuring code quality and reliability

2. Service Integration & Data Pipelines

• Integrate with advertising platform APIs (Meta Marketing API, Google Ads API, TikTok Ads)
• Build data ingestion pipelines processing campaign metrics, creative performance, and audience insights
• Handle webhook processing, event streaming, and asynchronous job processing
• Implement retry logic, circuit breakers, and graceful degradation for external service failures

3. AI-Ready Infrastructure

• Build backend services that support AI agent workflows and LLM integrations
• Design APIs that enable AI agents to query data, execute actions, and receive feedback
• Implement observability hooks (tracing, logging, metrics) for AI system monitoring
• Collaborate with Data Science teams to productionize ML models and predictions

4. Performance & Scalability

• Optimize API response times (P95 <500ms) and database query performance
• Implement caching strategies (Redis, CDN) for high-traffic endpoints
• Design for horizontal scalability using containerization and orchestration
• Monitor system health, troubleshoot production issues, and participate in on-call rotation

5. Code Quality & Collaboration

• Write clean, well-documented, and maintainable Python code following team standards
• Conduct thorough code reviews providing constructive feedback to peers
• Participate in pair programming sessions and knowledge-sharing activities
• Contribute to technical documentation, runbooks, and architectural decision records

What You’ll Bring

Required

• Bachelor’s degree in Computer Science, Software Engineering, or equivalent experience
• 5+ years of production backend development with demonstrable impact on system reliability and performance
• Python expertise: Strong proficiency in Python web frameworks (FastAPI, Flask, Django) and async programming
• API design: Experience building RESTful APIs with proper versioning, error handling, and documentation (OpenAPI/Swagger)
• Database proficiency: SQL expertise (PostgreSQL, MySQL) including schema design, indexing, and query optimization
• Cloud infrastructure: Hands-on experience with Google Cloud Platform (preferred) or AWS/Azure
• GenAI & Agentic Framework familiarity: Practical experience using GenAI tools (GitHub Copilot, ChatGPT, Claude) for development, understanding of LLM capabilities/limitations, worked on setting up agentic toolings such as RAG, Guardrails, Feedback loops, planning, MCP’s and orchestration tools etc...
• Containerization: Production experience with Docker and Kubernetes for service deployment

Non-Negotiable Technical Skills

Backend Core
Python Web Frameworks (FastAPI, Flask, or Django with async capabilities), SQL Database Design (PostgreSQL schema design, indexing strategies, query optimization), and API Architecture (RESTful design, authentication/authorization, rate limiting, error handling)

Cloud & Infrastructure
Google Cloud Platform (Compute Engine, Cloud Run, Cloud SQL, Pub/Sub, Secret Manager, IAM), Container Orchestration (Docker containerization, Kubernetes deployments, service configuration), and Infrastructure as Code (Terraform or equivalent for reproducible deployments)

Integration & Data
Third-Party API Integration (OAuth flows, webhook processing, rate limit handling, retry logic), Message Queuing (Pub/Sub, RabbitMQ, or Kafka for async processing), and Caching Strategies (Redis for session management, query results, and rate limiting)

GenAI & Observability
GenAI Tool Proficiency (Active use of GitHub Copilot, ChatGPT, or Claude for code generation, debugging, and documentation), LLM Integration Basics (Understanding of API usage, token management, prompt engineering, etc... ), and Observability (Structured logging, distributed tracing, metrics collection, and alerting)

Our Operating Principles

• Ship Code, Not Slides: We measure success by features in production, not meeting decks
• Engineering Excellence: Clean code, tested systems, thorough documentation, and scalable architectures
• Speed to Production: From feature branch to deployment in days, not weeks

• Data-Driven Decisions: We trust metrics, experiments, and user feedback over opinions

   

Continuous Learning: Every production incident and performance issue teaches us something new

What Success Looks Like (First 12 Months)

• Shipping velocity: Consistently deliver features from design to production within sprint cycles
• System reliability: Maintain <0.1% API error rate and P95 response times under target SLAs
• Code quality: Your PRs require minimal revisions and serve as examples for junior engineers
• AI readiness: Backend services seamlessly support AI agent integrations and ML model deployments
• Team impact: Improve developer productivity through better tooling, documentation, or architectural patterns

What’s In It For You

• Impact: Your APIs power advertising decisions affecting billions in ad spend across thousands of brands
• Technical Growth: Work with cutting-edge AI/ML systems, high-traffic APIs, and modern cloud infrastructure
• Ownership: Full responsibility for services from design through production operation
• Learning Budget: Conferences, courses, certifications, and dedicated learning time
• Compensation: Competitive salary, equity, performance bonuses, and comprehensive benefits
• Flexibility: Remote-first culture with flexible hours and work-life balance

Ready to Build the Future of Advertising AI? If you’re excited by the challenge of building ML systems that generate millions in revenue, we want to talk. Send us your GitHub, examples of production platforms you’ve built, and evidence of business impact you’ve driven. Show us why you’re the engineer who will help us revolutionize advertising through AI.

We’re looking for a Python Developer to join our team and work on an exciting, impactful project where your code will be used by real customers every day. If you enjoy solving challenging tasks, working with a modern tech stack, and seeing your solutions make a difference — you’ll feel right at home.

Mission of the role -  to design, build, and maintain reliable, high-performance back-end systems that power innovative features for our customers — ensuring speed, scalability, and stability at every step.

Here, you won’t just “close tickets” — you’ll collaborate closely with the team, experiment with new tech, and have a direct say in product decisions.

What you’ll do

• Develop and maintain projects using Python.
• Collaborate with the team to design and implement new features.
• Stay up-to-date with emerging technologies and industry trends.

• Communicate directly with customers when needed.

   

What we’re looking for

• Strong experience with PostgreSQL, Celery, Redis / RabbitMQ.
• Knowledge of FastAPI, WebSockets, SQLAlchemy + Alembic.
• Basic understanding of GIT and GitHub Actions.
• Experience with AWS (EC2, Elastic Beanstalk) will be a plus. 
• Basic understanding of Docker & Docker Compose.

• English level B1+.

   

What we offer

• Competitive salary & benefits.
• Modern office in Kyiv — bright workspace, great coffee, and a collaborative vibe.
• Opportunity to work on a high-impact, exciting project.
• Friendly, innovative, and supportive team environment.
• Professional growth and development opportunities.

• Flexible working hours & remote work option.

   

📩 Send us your CV — let’s build something great together!

Are you passionate and curious about server architecture?

Bizzabo is looking for a Senior Backend Engineer in Ukraine to join our fantastic engineering team.

Our server architecture is based on Java 8 and Python microservices. We are using the Spring Boot framework for our Java services with ElasticSearch, Redis, Temporal, and many other buzzwords as part of our ecosystem :) 

We are advocates for cutting-edge technology. We are looking for someone to join our team that is in charge of a product that connects Software and Hardware and real-time communication with an extremely interesting and lucrative product offering. 

WHAT YOU’LL BE DOING

• Be dedicated to product quality and have excellent analytical and problem-solving skills
• Continuously design, develop, and deploy backend services
• Focus on high availability, low latency, and scalability
• Contribute your analytical abilities
• Enthusiastically research new methods for doing things
• Provide solutions to challenging problems

WHAT YOU HAVE

• 5+ years of development experience using Python
• Working with databases 
• Built a microservices architecture for large-scale applications
• Have a deep understanding of security risks
• Working with AWS infrastructure: EC2, S3, RDS, SQS, etc.
• Computer science degree from a leading institute

 WHAT WOULD BE A BONUS

• Familiarity with Kotlin
• Experience with Kubernetes
• Experience with TDD or a testing culture

YOUR JOURNEY

✅ Prescreen with recruiter → ✅ Complete assignment → ✅ Technical interview → ✅ Interview with manager → ✅ Reference check → ✅ Job offer

Minimum of a Bachelor’s in Computer Science or related degree.

3+ years of development experience.

Client-server application development experience implementing end-user workflows.

Strong working knowledge of Java, JSON, RESTful Web APIs, JDBC, JavaScript, HTML, CSS, Tomcat, Apache HTTP Server, and the Linux environment.

Working knowledge of React. Relay and GraphQL are a plus.

Working knowledge of Java open-source frameworks (e.g., Play, Spring, Hibernate).

Experience with relational database principles.

Experience developing and debugging software in a multi-threaded environment

Strong proven design skills with the ability to work well in a dynamic, fast-paced environment with high expectations.

Solid experience with the full software development life cycle and a proven track record in successfully bringing products to market.

Excellent written and verbal communication skills, and the ability to interact well with both internal teams and external customers and partners.

Experience working in an agile scrum environment.

Knowledge of AWS, VMWare, or Citrix system is plus.

Job Responsibilities

Responsible for design and delivery of technical components on the server side of our client server application services.

Develop full-stack application functionality within a dynamic agile scrum environment.

Create high quality code testable through automation.

Create unit and functional automated tests.

Participate in troubleshooting and resolution of customer issues.

Department/Project Description

The qualified candidate will work as a member of the software development team focused on security, multifactor authentication, and server components for client’s Enterprise Access Management product.  This team is responsible for the architecture, design, and development of features for one of our essential product lines.  We are looking for someone who enjoys the challenge of tough technical problems and who wants to work on products helping over 1 million users every day in saving time, reducing frustration and providing a better user experience. We need someone with a passion for building world-class applications and desire to make an impact on our organization and on solving real-world problems.

Skill Category

Java

Keyskills - Must Have

• Java
• react
• Spring
• AWS

Job Description

Must have requirements:

• Overall 5+ years of commercial experience;
• Overall 3 + years of Kernel and Linux development experience;
• Experience with Linux System development (C/linker gcc/clang);
• Experience with Linux Kernel drivers (in tree/out of tree) development;
• Understanding of Linux internals knowledge (device drivers, interrupt handling, synchronization, memory management, processes, etc.);
• Experience with Kernel space and user space debugging;
• Git (github/gerrit) or any large source code management experience;
• Experience with build systems (make/Cmake/Yocto/OpenEmbedded technology);

Nice to have:

• Linux optimization techniques;
• Expirience with Kernel versions 4x-6x;
• Experience with python/bash/perl/lua;
• Contribution to various open-source projects will be a plus;

Job Responsibilities

• Develop Linux system-level patches for customer's internal distro based on OpenEmbedded/Yocto;
• Support and migration of an internal Linux distro to new versions of OpenEmbedded;
• Develop and maintain system software (libraries);
• Linux kernel versions migration;
• Develop and maintain build systems;
• Analyze product failures, fixing bugs and identify potential solutions;
• Software components integration (drivers, system libraries, applications);
• Customer-specific features development and upstreaming;
• Close interaction with opensource community;
• Collaborate with the other departments for requirements capture and clarification;
• Analyze system/subsystem performance and suggest optimization;

Department/Project Description

The American multinational technology company that designs, manufactures, and sells networking equipment. It's the worldwide leader in IT that helps companies seize the opportunities of tomorrow by proving that amazing things can happen when you connect the previously unconnected.

As part of our team, you'll be involved in various Linux kernel and userspace development, migration to new Linux kernels and OpenEmbedded versions, new features development, upstreaming features and patches to the community, and customer internal team support. Our team works closely with the community, and everyone contributes there.

Skill Category

Linux Kernel

Keyskills - Must Have

• C-Linux
• Linux
• C
• Linux Kernel
• Kernel development

Keyskills - Nice to Have

• Yocto
• Python
• Bash
• Perl
• Clang

About the Role

Bizzabo, a leader in event technology, is looking for a strategic and highly analytical Business Analyst to join our dynamic Revenue Operations Team. In this role, you will serve as a critical bridge between raw data and executive decision-making. You will be responsible for defining the analytical roadmap for our different GTM departments, ensuring that data is not just reported, but used as a competitive advantage to drive growth and efficiency.

What You’ll Be Doing

• Act as a dedicated strategic partner to GTM leadership (Sales, Marketing, and Customer Success).
• Identify growth opportunities and resolve operational bottlenecks through end-to-end analytical project leadership.
• Encompass the full data lifecycle, from gathering requirements and designing complex data models with optimized SQL to architecting a scalable BI ecosystem in Looker that replaces manual reporting with sophisticated automation.
• Go beyond descriptive reporting and leverage modern AI-powered tools to accelerate your workflow.
• Uncover the underlying drivers of business performance.
• Provide proactive insights and strategic recommendations based on key performance indicators.
• Continuously audit data quality and collection processes within the CRM to ensure a high-integrity, data-driven environment.

Required Experience & Skills

• Professional & Educational Background: 3+ years of experience as a Business/Data Analyst (preferably within a global SaaS or high-growth tech company) supported by a degree in Industrial Engineering, Statistics, Economics, or a related quantitative field.
• Technical Mastery:
• SQL Expert: Deep experience writing complex, optimized queries and working with modern data warehouses (e.g., Snowflake, BigQuery).
• BI Power User: Expert proficiency in Looker (LookML experience is a significant plus), Tableau, or similar enterprise BI tools.
• Data Manipulation: Advanced Excel skills for financial modeling and ad-hoc analysis.
• Business Acumen: Strong understanding of the SaaS business model and B2B sales funnels.
• Analytical Rigor: Proven ability to synthesize large, disparate datasets into clear, actionable business narratives.
• Communication: Fluent English with exceptional verbal and written communication skills. You must be able to explain technical concepts to non-technical business leaders.
• Mindset: Highly independent, self-motivated, and capable of managing multiple high-priority projects in a fast-paced environment.

Preferred Qualifications

• Experience with AI-integrated analytics platforms or building automated workflows using AI agents.
• Familiarity with Salesforce, HubSpot and PlanHat data structures.

We are seeking for a Senior Developer with deep expertise in AI, code, and scaling – and above all, the ability to lead bold technological processes and change the rules of the game.

If you live and breathe code, love automation, and get excited by the opportunity to write less and create more – this is your place.

1. We are looking for someone with Tech Lead experience- this is still a hands-on position.

2. Candidate must work with AI for a minimum of one year.

3. The profile here is a strong tech lead, who loves technology and exploring and learn new technologies by himself.

Responsibilities:

• Leading the transition from monolithic to microservices architecture
• Leading work with tools like GitHub Copilot and other LLMs as daily tools
• Accelerating development processes, automating tests, documenting and understanding complex code
• Defining new standards for high-volume development environments
• Technical leadership of a team – including training, mentoring, and hands-on implementation
• Implementing code solutions quickly and with high quality in critical systems environments
• Developing cloud systems

Requirements:

• 7+ years of backend development experience in C#/.NET, Node.js is an advantage
• 4+ years of experience in React.
• Great English communication skills.
• Proven experience in rapidly improving development speed and reducing bugs using AI-based tools
• Ability to lead end-to-end development processes including scaling, documentation, and automation
• System-level thinking, business orientation, and training skills Experience working with microservices architecture and building APIs
• B.Sc. in Computer Science or a similar technological field – required

Relevant Technologies:

• Backend: Node.js/C#/.NET Framework, ASP.NET Web API/Core, Entity Framework, Python
• Databases: SQL Server, MongoDB, Redis
• Messaging: RabbitMQ
• Frontend: Angular 5+, TypeScript, React
• Cloud & Containers: Azure / AWS, Kubernetes
• AI Tools: GitHub Copilot, Claude – proven experience required

Who:
We’re looking for a Senior AI/ML Engineer who combines strong machine learning fundamentals with a disciplined, evaluation-first approach to improving production AI systems.

What:
You’ll improve real AI systems used by real users — through metrics, experimentation, system design, and iteration.

When:
Start ASAP.

Where:
Remote (any location).

Type:
Full-time.

English:
Upper-intermediate or Advanced required.

The Role in a Nutshell

This is not a pure research position.

You’ll work on improving production AI systems through structured evaluation, diagnosing failures, refining prompts and agent workflows, and designing measurable improvements.

You won’t be working in isolation — you’ll improve systems that users depend on daily.

Responsibility Breakdown (Approximate)

• AI evaluation & KPI design — ~30%
• Prompt and multi-agent system design — ~30%
• ML systems (recommendation, optimization, etc.) — ~30%
• Engineering integration — ~10%

What You’ll Work On

AI Evaluation & System Quality (Core Responsibility)

• Design evaluation strategies for LLM and agent workflows
• Define metrics and KPIs for AI system performance
• Build and maintain evaluation datasets
• Systematically debug production AI failures
• Compare system behavior against baselines
• Run structured experiments and measure real impact

This is a central part of the role.

Multi-Agent AI Systems

• Improve agent orchestration and workflows
• Diagnose failures across agent pipelines
• Refine system prompts and agent interactions
• Improve reliability, latency, and output quality

Applied ML Areas (Depth > Breadth)

You’ll contribute to one or more of the following areas:

• Recommendation systems (ranking & personalization)
• Itinerary optimization & constraint-based planning
• LLM-based reasoning systems
• (Optional) Computer vision pipelines

Depth in at least one of these areas is more important than shallow experience in many.

Engineering Environment

We use:

• Golang (primary production language)
• Python for ML workflows
• Postgres, Redis, internal services

You don’t need to be a Go expert on day one, but you must be comfortable reading and modifying production code.

Backend engineers own infrastructure-heavy services — your focus is on AI system behavior, correctness, and measurable improvement.

What We’re Looking For

1️⃣ Strong AI/ML Fundamentals (Must-Have)

You understand the theory behind what you build and can choose appropriate methods.

Examples:

• Evaluation metrics (precision, recall, F1, etc.)
• Ranking & recommendation concepts
• Embeddings and similarity
• Experimentation methodology

Not required:

• Academic publications
• Advanced theoretical math
• Large-scale model training experience

2️⃣ Evaluation-Driven Mindset (Most Important Signal)

You:

• Think in metrics and baselines
• Design experiments instead of guessing
• Measure improvements quantitatively
• Debug failures methodically

This is the most important quality for this role.

3️⃣ Experience with LLM Systems

You’ve worked with:

• Prompt design
• Agent workflows
• Evaluating LLM outputs
• Production LLM integrations

4️⃣ Ability to Ship Production Systems

You can:

• Turn ideas into working systems
• Iterate based on results
• Balance exploration with delivery

5️⃣ Programming Ability

You’re comfortable writing production code in at least one language (Python, Go, or similar) and learning others as needed.

Strong Signals (Nice to Have)

• Experience improving AI systems post-deployment
• Recommendation or ranking system experience
• Optimization / constraint-based systems
• Computer vision experience
• Experience building evaluation frameworks
• Golang experience
• Startup or small-team engineering background

Ideal Candidate

• 5+ years of experience in AI/ML (exceptionally strong 3+ year candidates considered)
• Strong English communication skills
• Comfortable working in a fast-moving environment
• Focused on measurable impact, not just models

We are looking for ambitious people who want to build a career in international marketing. As a Marketing Intern, you will be dealing with external communication with marketing partners, freelancers, and the internal marketing team. Your day-to-day activity will be tied around writing emails, conducting web research, reviewing and managing content deliverables.
 

Why join Lemon.io?

We’re a bootstrapped, profitable, and growing company that’s all about transparency and impact. Our CEO is hands-on, and our culture is collaborative and open. We operate in a high-velocity sales environment where great ideas thrive, and results matter. If you’re driven, curious, and ready to grow, you’ll fit right in.
 

About Us

Lemon.io is a marketplace that connects world-class vetted developers with startup teams across the globe. We help our clients hire smarter and move faster — and we’re growing fast doing it.
 

Who we are looking for:

• Someone with excellent English skills, both written and verbal
• A positive and energized person who is not afraid to take responsibility
• A person who can structure information and present it clearly
• A fast learner who can quickly understand our business, marketing processes, and goals
• A research enthusiast capable of processing large volumes of information
• A user with hands-on experience in Google Sheets or Excel
   

Would be a plus:

• Writing experience in English
• Marketing education
• Marketing, media, or communications experience
   

What you will do:

• Reach out to potential and existing marketing partners via email and LinkedIn on a daily basis
• Write emails, using both templates and custom-written copy
• Build relationships and grow your network with marketers, content managers, and SEO experts
• Manage content delivery with internal and freelance teams
• Learn to use marketing and SEO tools, such as Ahrefs and Reply.io (with expert’s guidance)
• Conduct web research to identify potential marketing partners
• Increase the online brand presence of Lemon.io as your primary goal.
   

Hiring process:

• Screening call with a recruiter
• Test-task
• Real-time collaboration with the marketing manager
• Final call with the founder
   

Apply with a CV and a short note about why you are eager to join Lemon.io.

Requirements:

• 1+ year of experience in a similar position
• Strong understanding of animation principles, video editing, composition, and color theory
• Knowledge of AI tools (Midjourney, Runway, and others)
• Proficiency in Adobe After Effects and Premiere Pro

• Experience working with Illustrator and Photoshop to prepare assets for animation

   

Responsibilities:

• Create high-performing video creatives for various advertising platforms

• Participate in creative brainstorming sessions and competitor analyses

   

Nice-to-haves:

• Interest in social media trends, design innovations, motion graphics techniques, and new AI tools to create fresh, engaging, and trend-driven content

   

Employee Benefits:

• Remote-First Culture: Our team is diverse and extensive, just like our product portfolio. We provide a flexible working schedule and let you work anywhere in the world, either remotely or in one of our corporate hubs.
• Сoworking Compensation: We provide 50% compensation for coworking spaces worldwide to make sure that everyone has a comfortable and inspiring workspace.
• Public Holidays Policy: Gismart observes public holidays based on the Ukrainian or Polish holiday calendars. Employees working in other locations are entitled to 12 public holidays per year.
• 100% Sick Leave Compensation
• Mental and Physical Health: To help you stay happy and healthy, Gismart will partially cover your medical insurance, sports activities, therapy costs.
• Personal Equipment Policy: Of course, we’ll provide you with all the equipment you need or cover the maintenance cost for your own tools.
• Personal Learning and Development: We love to see you learn and grow, so Gismart will cover 70% of your professional development courses. We’ll also pay for 100% of corporate English courses.
• Time-Off Policy: Every employee gets 18 working days of paid vacation and 3 personal days per year, with an extra day added for each year at Gismart.
• Corporate Events: We are remote-first, but we love meeting up in person. Whenever possible, we organize corporate events and team-building activities across all Gismart hubs.