Jobs at Djinni

The role

We are not filling a headcount slot. We want the person to own the trading systems side of a young market data and trading infrastructure business, with the door open to becoming a partner.

We are building a Rust market data and trading infrastructure platform. Several venues are already live in the capture pipeline, across CEXs, DEXs and prediction markets, and expanding that coverage is the bulk of the near-term work. Full-depth order books and trades, normalised so one integration serves many venues, on columnar storage with an analytical query layer over it.
 

What you would own

Venue connectivity end to end, from feed through normalisation, gap detection and replay. The shared abstraction every venue fits behind, which will either hold or turn into a special case per venue. Correctness of the capture path, including the boring parts that decide whether a backtest is trustworthy. Execution components as they come online. Read-side today, but it is on the path. Operability, since nobody hands off support to another team here. Technical direction in your area. You argue the trade-off, you make the call, you live with it.
 

Who we are looking for

We're looking for someone with a deep interest in trading and market dynamics. Proficiency in Rust, especially async and Tokio, is essential, and so is a solid grasp of multithreading and concurrency. Hands-on experience with market data or trading systems, such as exchange feeds, order books and exchange APIs, counts for a lot. You should be able to critically evaluate code changes and anticipate their long-term impact. Break down your own work into actionable tasks and prioritise them effectively. Experience with exchanges, market making, order execution, time-series storage such as ClickHouse or Parquet, or AWS/Linux performance work is a plus.

Languages: Ukrainian – upper-intermediate (B2+) spoken; English – B2, confident with written communication and technical documentation.
 

Seniority and time

We are not labelling this junior or senior. What matters is whether you can carry a component without much direction. Learning the trading domain here is fine.

The first three months are a full-time probation period. After that we can talk about a partnership and other ways of working together, part-time included.

How we hire

1. A logical reasoning test, around 40 minutes. Abstract pattern matching, no coding.
2. A bug fix. You get a small exercise repository with a bug ticket and a pull request that tries to fix it. Review it as you would a teammate's, and if its fix falls short, write your own. You have 72 hours from the moment you accept the invitation.
3. If your bug fix holds up, a 45-minute call. We get to know each other first, and then go through your review and your fix together.
    

What we can offer

You would build the thing rather than maintain someone else's version of it. Venue connectivity, capture guarantees, ordering and state under failure, and execution once the read side is solid. Not many engineers get to work on a system like this, and the experience is hard to acquire any other way.

The data comes with it. Full depth across every venue we capture, yours to research against. Buying comparable history costs real money, and most engineers who want to test an idea properly never get near it.

Pay is $1,000 a month, for the three-month probation only. That is the real figure, not a placeholder. We know it is well below what an experienced Rust engineer earns elsewhere, and we would rather say so here than have you find out at the end of the process. After probation, a partnership may follow for the right person, with a share of the revenue once there is any, and pay from then on is part of that conversation.
 

How to apply

Please attach your CV and put your GitHub username in your cover letter (for example, GitHub: octocat). We read the CV to see your experience, and use the username to send you the bug-fix task.

About Our Client

Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.

About the Role

We are looking for a Senior Software Engineer to work on the core query engine of a large-scale distributed data platform. You will own significant components across query planning, optimization, and execution — both driving improvements and acting as a trusted owner of production quality: diagnosing complex customer-reported issues and delivering safe, well-tested fixes across supported release lines. Engineers with staff-level scope and ambitions are very welcome.

This is a systems-level, backend engineering role focused on distributed data processing internals — not application development or CRUD services.

Responsibilities

• Architect, design, and implement query engine components — planner, optimizer, execution operators, memory management, and data access layers
• Diagnose and resolve complex production and customer-reported issues across the full query path — correctness, performance, memory, concurrency, resiliency, and compatibility
• Develop, review, and backport fixes across multiple supported release lines; strengthen regression prevention
• Write and review high-quality, performance-critical code in Java and/or C++
• Analyze query profiles, execution plans, logs, and telemetry to drive performance optimization — profiling, benchmarking, and eliminating bottlenecks in latency- and throughput-sensitive paths
• Integrate with columnar formats, open table formats, and connectivity drivers
• Improve regression tests, diagnostics, and observability; contribute to CI/CD architecture and quality processes in Jenkins
• Mentor middle engineers, lead code reviews, and help set technical standards
• Debug complex cross-layer issues spanning query planning, distributed execution, memory management, and I/O, partnering with US-based engineering leads

Required Qualifications

• B.S. or M.S. in Computer Science, Computer Engineering, or a related field
• 5+ years in backend / systems software engineering with a track record of owning significant components end-to-end
• Strong proficiency in Java or C++ (comfort with both is especially valued), with deep understanding of OOP, systems design, memory management, concurrency, and asynchronous programming
• Advanced SQL and solid understanding of query execution internals — planning, optimization, operator implementation
• Experience building or extending data processing systems: query engines, distributed databases, ETL/ELT, or analytical platforms
• Ability to assess change risk in a mature production system; experience supporting software across multiple versions, branches, or customer environments
• Hands-on experience with Jenkins and modern CI/CD workflows; Docker and Kubernetes
• Hands-on experience with at least one major cloud (GCP, AWS, or Azure)
• Confident Git/GitHub workflows and rigorous code-review habits
• Comfortable with AI-assisted development workflows — using modern AI tools for code comprehension, debugging, and test generation, and critically validating their output
• Prior experience mentoring engineers, leading technical designs, or owning components end-to-end
• English Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team
• Availability to work EU business hours shifted 2–3 hours later for daily overlap with US West Coast mornings

Desired Skills

• Apache Arrow (columnar in-memory format) and SQL planner/optimizer frameworks such as Apache Calcite
• LLVM-based runtime expression compilation / code generation
• Open table formats — Apache Iceberg, Delta Lake, or Hudi — and columnar file formats such as Parquet, Avro, or ORC
• MPP query engines (Presto, Trino, or similar); background with distributed data platforms such as Spark, Snowflake, or Databricks
• Deep understanding of query optimization (cost-based, rule-based), vectorized execution, memory management, spilling, and caching
• Connectivity drivers: JDBC, ODBC, Arrow Flight
• Managed Kubernetes (GKE/EKS/AKS) and multi-cloud exposure; Terraform; cloud object storage (AWS S3, Azure Data Lake Storage, Google Cloud Storage)
• SaaS operations experience: incident response, profiling, observability, release and backport processes
• Systems-level performance work and open-source contributions to data infrastructure projects

Details

• Engagement: Long-term contract
• Location: Europe (EU / EEA / UK), remote
• Working hours: EU business hours, shifted 2–3 hours later for daily overlap with the US West Coast team

We are looking for a proactive and well-organized HR Manager to support recruitment for our online projects.

Your main responsibility will be communicating with applicants, conducting initial interviews, presenting open roles clearly, and helping candidates move through the recruitment process.

Responsibilities:

• Review incoming applications and conduct initial candidate screening.
• Communicate with candidates via chat and video calls.
• Schedule interviews and coordinate the hiring process.
• Clearly explain job requirements, work formats, and next steps.
• Maintain candidate records and follow up when needed.
• Work with hiring managers to improve candidate sourcing and recruitment workflows.
• Provide a professional, respectful, and timely candidate experience.

Requirements:

• Strong written and spoken communication skills.
• Ability to conduct polite, confident, and structured conversations.
• Good organizational skills and attention to detail.
• Ability to manage several candidate conversations at the same time.
• Proactive attitude and willingness to learn recruitment processes.
• Previous recruitment or HR experience is a plus, but not required.
• English at Intermediate level or higher is a plus.

We offer:

• Remote work and flexible schedule.
• Clear onboarding materials and recruitment workflows.
• Support from the team during the onboarding period.
• Opportunity to grow into a Senior Recruiter or HR Lead role.
• Compensation discussed individually, based on experience and workload.

Important:
We provide candidates with transparent information about every role, its responsibilities, and the terms of cooperation

About Us

Epic Play Holding is a fast-growing sweepstakes casino operating in the US market. We combine the thrill of social gaming with a legally compliant sweepstakes model, giving players a fun and rewarding entertainment experience. 

Expected results/responsibilities:
1. Game Releases & Launches

• Monitor release calendars from aggregators and providers
• Add, test, and verify new games before going live
• Track launch statuses and follow up on issues

2. Game Catalog Management

• Assign games to correct categories and collections
• Weekly review of sorting, positioning, and featured sections
• Remove outdated or unavailable games

3. Back Office & Promotional Content

• Manage banners, icons, and promotional placements via back office
• Upload, schedule, and remove promotional assets
• Ensure all content displays correctly

4. Promotional Campaign Operations

• Track and launch provider/aggregator promotions on time
• Set up banners, game placements, and collections per campaign
• Remove materials after campaigns end and report issues

5. Quality Control & Reporting

• Regular checks of live games and lobby content
• Maintain release and promo calendars
• Weekly updates on launched games and active promotions
• Escalate technical and operational issues as needed

Professional experience is required:

• 1+ year of experience in iGaming, preferably in casino content management, gaming operations, or a similar role is an advantage
• Hands-on experience with casino back-office systems is highly preferred.
• Experience with Excel, google workspace. 
• Experience with promotional content management is a plus.

We Offer

• Competitive salary with room for growth
• Remote-friendly work format
• Mentorship from experienced affiliate and marketing professionals
• Real ownership and fast career growth in a scaling product
• A dynamic, friendly team working on an exciting US-market product

Interested? Send us your CV — we’d love to hear from you!

We are a growing international IT services & software company with a strong operational presence in the United Kingdom, Europe, and Ukraine. We are seeking a proactive, and strategy-driven Marketing Manager to own and elevate our digital presence across global markets. In this role, you will lead the creation and execution of our online strategy, continuously manage our website, high-impact content marketing initiatives, drive local/global SEO and Generative Engine Optimization (GEO).

Key Responsibilities

Marketing Strategy & Online Presence

• Develop, execute, and continuously refine a comprehensive digital marketing strategy tailored to B2B clients in the UK, Europe, and North America.
• Position the company as a premier IT technology partner by aligning messaging with key industry verticals and services.
• Monitor market trends, competitor tactics, and customer insights to continuously discover new growth channels and brand positioning opportunities.

Website Management & Optimization

• Lead website performance enhancement, continuous UX/UI updates, and conversion rate optimization (CRO).
• Coordinate with internal software developers and designers to launch new landing pages, update service offerings, and maintain high page-load speeds and usability.
• Ensure website messaging accurately reflects technical capability, client case studies, and business value propositions.

Content Strategy & Social Media Leadership (LinkedIn)

• Create and maintain an integrated editorial content plan across all digital touchpoints.
• Own and scale our primary B2B social channel, LinkedIn, by designing strategic campaigns, writing engaging posts, and leading thought leadership initiatives for company executives.
• Oversee end-to-end production of long-form articles, whitepapers, case studies, and technical insights in coordination with subject matter experts (engineers, architects, project managers).

SEO & Generative Engine Optimization (GEO)

• Plan and execute complete Search Engine Optimization (SEO) campaigns (technical, on-page, and off-page/link building).
• Implement Generative Engine Optimization (GEO) strategies to ensure brand visibility within AI search tools (ChatGPT, Perplexity, Gemini, Claude, SearchGPT).

• Perform ongoing keyword research, competitor gap analysis, and content optimization to drive organic lead generation.

   

Client Engagement, Travel & Event Marketing

• Represent the company at industry conferences, tech expos, and networking events across Europe and the UK.
• Organize on-site and virtual client events, roundtable discussions, and meetups.
• Travel periodically to meet directly with current and potential clients to gather marketing feedback, testimonials, and support account-based marketing (ABM) efforts.

Required Experience & Qualifications

Must-Have Requirements

• 1+ years of experience as a Marketing Manager or Lead Content/Digital Strategist, preferred within the IT services, software development, or tech consulting industry.
• Fluent / C1-C2 Level English (both written and spoken) with business copyediting skills for Western markets.
• Fast learner & adaptable mindset: Strong desire and ability to learn quickly, continuously adapt to new marketing tools, tech domains, and industry shifts.
• Proven track record of running lead-generating content marketing and LinkedIn campaigns for B2B tech clients.

• Demonstrated ability and willingness to travel within Europe and the UK for events, client meetings, and strategic workshops.

   

Nice-to-Have Skills

• Experience targeting both Western European (DACH, UK, Nordics) and Ukrainian talent/tech networks.
• Basic knowledge of CRM platforms (HubSpot, ClickUp) and email marketing tools.

Key Metrics & Performance Indicators (KPIs)

• Growth in organic traffic and AI-driven search referrals (GEO visibility).
• LinkedIn engagement rate, follower growth, and inbound lead generation from social campaigns.
• Website conversion rates (inquiries, contact form submissions, case study downloads).
• Successful ROI from attended regional conferences and offline client networking trips.

What We Offer

• Competitive compensation package with performance-based bonuses.
• Flexible hybrid work arrangements with offices Kyiv or Lviv.
• Fully covered travel expenses for industry conferences, exhibitions, and client visits.
• Opportunity to work directly with senior leadership and shape the global brand identity of a growing IT company.

• Employment: Full-time, B2B contract
• Schedule: Monday–Friday, 15:00–00:00 Prague time
• Compensation: Up to $2,000 per month + performance-based bonuses (KPI)
• Payments: Official bank transfers; the company covers income tax separately
• English: B2+ (C1 preferred)
   

Responsibilities

• Independently source and acquire new affiliate partners for the US market.
• Build and develop long-term relationships with affiliates.
• Leverage an existing network of active affiliate partners.
• Manage the full partnership lifecycle, from initial outreach and negotiations to onboarding, traffic launch, and scaling.
• Negotiate commercial terms using CPA, RevShare, and Hybrid models.
• Identify and evaluate US traffic sources and assess the quality of acquired players.
• Monitor key performance metrics, including FTDs, deposits, traffic profitability, and ROI.
• Work with affiliate platforms, tracking links, and postbacks.
• Optimize partner performance, increase traffic volumes, and achieve agreed KPIs.
• Track performance and prepare regular reports.
   

Requirements

• Hands-on experience in Affiliate Marketing within Casino, iGaming, or Sweepstakes.
• Recent experience working with US traffic is mandatory. Experience must be current or have ended within the last three months.
• Understanding of the Sweepstakes Casino business model and its specifics.
• An active network of affiliate partners who could potentially be onboarded.
• Proven ability to independently source, negotiate with, onboard, and grow affiliate partnerships.
• Knowledge of effective US traffic sources and experience evaluating traffic quality.
• Understanding of CPA, RevShare, and Hybrid partnership models.
• Experience with affiliate platforms, tracking systems, and postbacks.
• Strong negotiation, communication, and relationship-building skills.
• English B2+ for professional correspondence, calls, and negotiations; C1 is preferred.
• A results-driven mindset and willingness to work toward clearly defined performance KPIs.

Join a Company That Invests in You

Seeking Alpha is the world’s leading community of engaged investors. We’re the go-to destination for investors looking for actionable stock market opinions, real-time market analysis, and unique financial insights. At the same time, we’re also dedicated to creating a workplace where our team thrives. We’re passionate about fostering a flexible, balanced environment with remote work options and an array of perks that make a real difference.

Here, your growth matters. We prioritize your development through ongoing learning and career advancement opportunities, helping you reach new milestones. Join Seeking Alpha to be part of a company that values your unique journey, supports your success, and champions both your personal well-being and professional goals.

What We're Looking For

Role Overview: You will take ownership of the search infrastructure for Ask Seeking Alpha — a financial intelligence platform powered by LLMs. Your main goal is to ensure our AI agents can find the exact financial data they need (articles, transcripts, news) in milliseconds. You will work on the Retrieval layer of our RAG architecture, combining traditional text search with modern vector search techniques.

Tech Stack: Elasticsearch (v8+), Python (FastAPI, Asyncio), OpenAI Embeddings, LangChain, LangSmith.

The Senior Search Engineer will be engaged with the company as a contractor (Private Entrepreneur).

What You'll Do

• Search Engine Development: Design and implement Hybrid Search strategies. You will figure out how to best combine "keyword matching" (finding specific tickers like 'AAPL') with "semantic search" (finding concepts like 'revenue growth').
• Relevance Tuning: You are responsible for the quality of search results. You will build systems to measure and improve how well the search engine answers user queries (using tools like LangSmith).
• Vector Search & RAG: Manage the integration of OpenAI embeddings into Elasticsearch. You will solve challenges related to indexing long documents (e.g., earnings transcripts) so the AI retrieves only the most relevant parts.
• Performance Optimization: Optimize Elasticsearch queries and index settings to ensure low latency, even for complex queries with many filters.
• Python Backend: Develop and maintain the Python services that build queries and process results. We use FastAPI and Asyncio heavily.

Requirements

• Elasticsearch Expert: 5+ years of experience working with Search Engines in production. You understand how indices, analyzers, and mappings work "under the hood."
• Search Theory: You understand the difference between Lexical Search (keywords) and Vector Search (meaning), and know when to use which.
• Python Proficiency: Strong experience with Python 3.10+. You are comfortable writing asynchronous code (async/await) and building APIs.
• Data Engineering: Experience designing data schemas for search (how to structure JSON documents for efficient retrieval).

Nice to Have

• Experience building RAG (Retrieval-Augmented Generation) pipelines.
• Familiarity with LangChain or similar LLM frameworks.
• Experience with Evaluation tools (like LangSmith) to test search quality automatically.
• Background in Finance (understanding tickers, earnings calls, etc.).

Join a Company That Invests in You

Seeking Alpha is the world's leading community of engaged investors. We’re the go-to destination for investors looking for actionable stock market opinions, real-time market analysis, and unique financial insights. At the same time, we’re also dedicated to creating a workplace where our team thrives. We’re passionate about fostering a flexible, balanced environment with remote work options and an array of perks that make a real difference.

What We're Looking For

Do you look at websites and think about how they might be personalized? Do you use websites and apps and think about how their features have been designed to be best for a lot of different users? Do you read articles with statistics and think about how they may be misinterpreting the data to get their results? If these things describe you, and if you’re great at SQL and have experience analyzing website data, you’re someone we want to talk to.

We’re looking for a Senior Data Analyst with experience analyzing website data. Our data analyst team analyzes everything on our website, not only for their immediate use but also for how they connect to high-level company KPIs. Our Analysts analyze raw data, not only pre-aggregated data, to extract just the right information and diagnose what is happening on our site.

The role requires understanding web development and how data is gathered, analysis of site usage and a/b tests, data visualization, and how different kinds of data can be presented most clearly, and business KPIs and how they are measured.

But more than that, we’re looking for experienced analysts who can bring us new ideas about how to analyze and extract insights from website data. Our ideal candidates have measured KPIs that we haven’t measured or used new ways to explain user retention, or analyzed features of users' data that we haven’t analyzed.

The best thing about our work is that we’re part of an incredibly data-driven company. Everyone from the CEO down uses data every day. The data teams are involved in every single thing the company does.

What You'll Do

• Analyzing the behavior of users on our site and apps:

-Build and maintain dashboards that visualize the usage of single or multiple features and how that usage drives company KPIs.

-Answer questions about site usage or user behavior based on deeper analyses.

• Analyze and track high-level KPIs such as conversion, retention, churn, recurring revenue, engagement, cross-device usage, e-mail and notification usage, and more.
• Communicate with business stakeholders on analysis results, how they relate to business, and what business suggestions result from the analysis.
• Run the whole data flow for site and app features, from defining KPIs, specifying data collection for development team implementation, and building and maintaining iterative versions of dashboards with both low-level and high-level views of collected data.
• Split tests of product features:

-Design a test with clear success criteria

-Monitor test integrity

-Analyze results and give recommendations

-Use segmentation and clear cohort analysis to validate significant conclusions

-Conduct exploratory analysis to identify trends and opportunities

Requirements

• A minimum of 5 years in a B2C website-related Data Analyst position
• Strong SQL skills with experience writing complex and efficient analytical queries
• Demonstrated experience with working in English directly with business stakeholders, understanding their needs, and explaining results
• Understanding of website development and operations and how they connect to data gathered.
• Experience with data visualization tools (Looker/Tableau/PowerBI, etc.)
• Experience with report writing and technical requirements analysis, business process modeling/mapping, methodology development, and data modeling

About SYNTECH Digital

We are an official Creatio partner and product company. SYNTECH delivers complex CRM/ERP implementations for clients in manufacturing, logistics, HR, and finance, using our own Marketplace product suite as part of the solution toolkit.

Responsibilities
    •    Own implementation projects end-to-end: from kick-off and requirements gathering to UAT and go-live
    •    Collect and document business requirements (BRD, Scope, User Stories, functional specs)
    •    Plan sprints, track deadlines and budget, manage scope changes
    •    Act as the primary client contact: demos, progress reports, expectation management
    •    Coordinate developers, QA, and analysts; remove blockers and escalate risks early
    •    Contribute to pre-sales: effort estimation, solution scoping, commercial proposal preparation
    •    Maintain structured project documentation and risk registers throughout delivery
Requirements
    •    2+ years of PM experience in CRM / ERP or IT implementation projects
    •    Understanding of the Creatio platform or comparable CRM/ERP (Salesforce, Microsoft Dynamics, HubSpot)
    •    Proven experience writing BRD, SRS, and Scope documents
    •    Agile / Scrum or hybrid methodology experience
    •    Confident communication with business stakeholders and C-level
    •    Analytical mindset, attention to detail, systematic approach
    •    English — B1+

Nice to Have
    •    Creatio certification, PMP, or PRINCE2
    •    Domain experience in manufacturing, HR, logistics, or finance
    •    Basic technical understanding: API integrations, databases, business process automation
Key KPIs
    •    Estimation accuracy ≤ 20% deviation from actuals
    •    % of milestones delivered on time
    •    Client NPS after project close
    •    Minimal unplanned scope changes post kick-off

We Offer
    •    Competitive salary + performance bonus for successful project delivery
    •    Diverse industry portfolio — no two projects alike
    •    SYNTECH’s own Marketplace modules as part of your solution toolkit
    •    Flexible 5-day schedule, fully remote
    •    24 days paid vacation
    •    Growth to Head of Delivery or Partner track

We are looking for junior candidates for a broad range of remote, computer-based tasks.

Your previous background is not the main factor. You may be an aspiring developer, a student, a career changer, a support specialist, a QA beginner, a content specialist, or simply someone who is comfortable working with a computer and online tools.

If you can use a computer, access the internet, learn new software, follow instructions, and communicate clearly, we would be happy to hear from you.

Relevant experience may include working with any software, websites, online services, office tools, programming languages, no-code tools, technical support systems, design tools, data, content, or digital products. Experience is welcome but not required.

What we expect:
• Basic computer literacy
• Stable internet connection
• Ability to work independently and responsibly
• Willingness to learn and use new tools
• Attention to instructions and deadlines

What we offer:
• Remote work
• 6 working hours per day
• Entry-level opportunities for candidates with different technical backgrounds
• Tasks and direction matched to your current skills and learning capacity
• Monthly compensation of USD 750–1,500, depending on responsibilities and performance

Please apply and briefly tell us what software, online tools, programming languages, or computer-related tasks you have used before — even if your experience is informal or limited.

DID Global is an international company specializing in providing premium-quality IP telephony services for both business and personal communication. We help our clients scale, optimize advertising budgets, and significantly increase sales.
 

Who We Are Looking For:

We are seeking an ambitious International Business Development Manager who can successfully combine active B2B client acquisition with professional account management. You will work with international companies, develop accounts, build long-term relationships, and directly influence the company’s financial growth.
 

Key Responsibilities:

• Actively search for and attract new clients, expanding the contact base.
• Manage client accounts: identify client needs and provide optimal solutions.
• Build long-term partnerships and support clients at all stages of cooperation.
• Handle objections, consult clients on company services, and create tailored commercial proposals.
• Achieve sales goals and meet KPIs.
• Organize and manage your sales pipeline in CRM.
• Communicate via messengers, phone calls, emails, and specialized platforms.
   

Our Ideal Candidate:

• At least 2 years of experience in sales or proven experience in the VoIP industry.
• English proficiency at B2+ level (for international communication).
• Fluent in Ukrainian and Russian (required for client communication).
• Confident in using CRM systems and quick to adapt to new tools.
• Strong skills in negotiation, active listening, and objection handling.
• Goal-oriented, self-motivated, and proactive.
• Ambitious to grow professionally, with the potential to lead a team in the future.
   

What We Offer:

• A comfortable working environment with a strong focus on work-life balance, growth, and long-term collaboration.
• A stable working schedule: Monday—Friday, 10:00–19:00 (Kyiv time).
• Remote work format with the opportunity to be part of an international team.
• Official employment and company-paid medical insurance.
• Support for mental well-being: access to a corporate psychologist.
• Company-sponsored English courses.
• Opportunities for professional and career growth within an international company.
• Paid vacation.
• An active corporate life: internal events, team activities, and contests that foster engagement and team spirit.

We are looking for a Senior Full Stack Engineer (Java + React) for our partner, a growing software company based in Spain.

Our partner combines product development with client-facing engineering work. They build their own products in the search and AI space while also delivering software solutions for enterprise customers.

As part of an international engineering team, you will work on a live production platform used by real customers, contributing across both backend and frontend development and playing a key role in the evolution of its architecture.

This is a full-time remote contract position with an initial commitment of at least six months and the possibility of long-term extension.

Responsibilities

• Design, develop, and maintain backend services and APIs using Java and Spring Boot.
• Develop and maintain modern frontend applications using React.
• Build and deliver end-to-end features across the backend and frontend.
• Participate in a major platform migration toward a more secure and modern architecture.
• Contribute to architectural and technical design decisions.
• Transform business requirements into scalable technical solutions.
• Improve and refactor existing systems while maintaining production stability.
• Work with AWS infrastructure and cloud-based production environments.
• Collaborate closely with QA and cross-functional teams throughout the development lifecycle.
• Participate in Agile ceremonies and planning activities.
• Use AI-assisted development tools as an integral part of the engineering workflow.

Requirements

Technical Skills

• 6+ years of professional software engineering experience.
• Strong hands-on experience with Java and Spring Boot.
• Strong hands-on experience with React and modern frontend development.
• Strong hands-on experience with AWS and building or deploying production applications in AWS environments.
• Proven experience building and maintaining production-grade APIs and web applications.
• Solid understanding of software architecture, system design, and data modeling.
• Good understanding of frontend architecture, component-based development, and API integration.
• Experience with Docker, CI/CD pipelines, and modern cloud-native development practices.
• Experience working on live products with real production workloads.

AI & Modern Engineering Expectations

• Strong hands-on experience using AI-powered development tools such as Claude Code or similar as part of the day-to-day engineering workflow.
• Up-to-date understanding of modern AI capabilities and their practical application in software development.
• Ability to use AI tools to accelerate development, improve code quality, support architectural decisions, and increase engineering productivity.
• Experience with Spec-Driven Development (SDD) or similar methodologies that enable AI-native development workflows.
• Ability to identify opportunities where AI can add meaningful value to the product and its users.
• Comfortable working in an engineering environment where AI-assisted development is an integral part of the software development lifecycle.

Communication

• English level B2 or higher.
• Ability to communicate technical concepts clearly to both technical and non-technical stakeholders.
• Strong written communication and documentation skills.
• Comfortable working within distributed international teams.

Personal Qualities

• Strong ownership mentality and proactive approach.
• Ability to identify issues early and drive solutions independently.
• Open-minded and adaptable when evaluating technologies and approaches.
• Focus on code quality, maintainability, and long-term sustainability.
• Collaborative attitude and strong teamwork skills.

English at C1 is required!
 

We’re looking for a Social Media & Growth Marketing Specialist to join our small team and take responsibility for attracting new users to our app and growing our media presence.

This role combines social media management, content creation, influencer collaborations, and growth experiments. You’ll also become a public face of our brand, creating videos featuring yourself and our app.
 

What matters most to us is honesty, open communication, and proactivity. We’re looking for someone who takes initiative, is open about their weaknesses and knowledge gaps, and feels comfortable asking questions and seeking help in areas where they need support.

Previous professional experience is not required. We’re ready to teach you and support your development. However, you should already feel natural on camera and understand social media fundamentals, including hooks, content length, and how to communicate with an audience. You don’t need to speak on camera. We can use voiceovers or voices generated with AI instead.

What you’ll need:
 

English at C1 level or higher. You must be comfortable speaking freely in English, including holding conversations lasting one to two hours.

The first interview will be in English so we can assess your English level and how comfortably you express yourself in conversation. After that, everyday communication can be a mix of Ukrainian and English, with one weekly meeting with the founders held in English.

Confidence on camera. You should feel comfortable appearing in videos and presenting our app in a natural, engaging way. Speaking on camera is optional.
 

An understanding of social media content. You should understand what makes a strong hook, how to choose an appropriate content length, and how to adapt your communication to your audience.

You don’t need to know every tool or have experience with every responsibility below. We’ll help you learn what you’re missing.

Your responsibilities
 

Social media and community engagement

Manage and develop our presence on Threads, X (Twitter), Reddit, Discord, and LinkedIn.

On Threads, you’ll publish posts from our account, respond to replies on our posts, and engage with other creators’ posts by recommending and promoting our app in relevant conversations.
 

Instagram and TikTok content

Create weekly posts and stories for Instagram and TikTok. Produce carousels and reels including showcasing the app, from the initial idea through recording, editing, and publishing.
 

Influencer collaborations

Research potential influencer partners, evaluate opportunities, and make decisions about which collaborations to pursue.

Reach out to influencers, manage messages, follow up, and coordinate collaborations.
 

AI content and tools

Create videos using AI, experiment with cartoons generated with AI, and edit it.

Set up AI agents to support our marketing work and explore ways to use AI in content creation and daily workflows.
 

User acquisition and growth

Keep asking: “How can we get more users?” and “How can we increase our media presence?”

Bring ideas, identify opportunities, and turn them into practical experiments. Your role is not only to publish content, but also to help us understand what attracts people to the app.
 

Google Play and App Store pages

Manage and improve the text on our Google Play and App Store pages.

Experiment with different descriptions, using the testing options available on each platform. Track conversion rates for the different versions and use the results to identify the most effective messaging.
 

Reporting and teamwork

Create monthly performance reports covering our social media channels, Google Play, and the App Store. Summarize results, explain what worked and what didn’t, and suggest what to try next.

Participate in daily calls with the CEO and weekly calls with the whole team.

What we offer

• Base salary of $500+ per month, with salary reviews every few months.
• A performance bonus of $100 for every 1,000 new users.
• Equity/stock after three months of work.
• Learning support and access to experienced specialists. If you have knowledge gaps in marketing or other areas, we can pay for one or two consultations per month with more experienced specialists and purchase educational materials.
   

We don’t expect you to know everything from day one. We’re ready to teach you, help you develop your skills, and give you room to grow alongside the app.

Join an international engineering team building a high-performance data platform used by Fortune 500 companies. As a Middle Java Engineer, you’ll work with distributed, multithreaded systems, solve real-world production challenges, and deepen your expertise with mentorship from senior engineers. Fully remote across Europe, with long-term collaboration and the opportunity to grow in the data engineering domain.

About Our Client
Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.
 

About the Role
We are looking for a Middle Software Engineer (1.5–3.5 years of experience) to join the sustaining engineering team for the data catalog and enterprise data management layer of a large-scale lakehouse platform — the services that automate data ingestion and optimize Apache Iceberg tables for existing customers. The team's mandate is to keep these services running reliably for current clients: investigating and fixing customer-reported issues, resolving defects, addressing performance regressions, and keeping dependencies and security patches current. This is a maintenance and support role, not a feature-development role.
 

This is a backend Java role in a multithreaded, distributed environment where stability and availability for production customers are the baseline expectations. You will work with hands-on mentorship from senior engineers and in daily collaboration with US-based engineering leads and support teams.

Responsibilities
 

• Investigate, reproduce, and fix customer-reported issues and defects in the catalog and data-management services (Java)
• Diagnose production problems from logs, metrics, and thread or heap dumps, and work with support teams and solution architects on customer escalations
• Address performance regressions and stability issues in multithreaded, distributed services.
• Keep the services current: dependency and library upgrades, security patches, and compatibility fixes
• Write regression tests and small supportability improvements (logging, metrics, diagnostics) so issues are easier to catch and triage next time
• Take part in code reviews and follow the team's release and hotfix process
• Track and apply relevant upstream fixes from the Apache Foundation open-source projects used by the platform

• Communicate status, root causes, and blockers clearly in daily syncs with US-based engineering leads

   

Required Qualifications

• B.S. or M.S. in Computer Science or a related field 
• 1.5–3.5 years of professional software engineering experience, preferably in backend or data-intensive systems
• Strong Java programming skills: solid command of the language, the JVM ecosystem, and standard tooling (Maven or Gradle, JUnit)
• Comfortable debugging and supporting production systems — reading logs and stack traces, reproducing issues, and finding root causes
• Good grounding in data structures and algorithms
• Working knowledge of multithreaded and asynchronous programming in Java (java.util.concurrent, executors, futures) and the motivation to go deeper
• Care for engineering quality — tests, code reviews, and an understanding of why availability, resiliency, and zero-downtime upgrades matter 
• Comfort with a fast-moving environment, ownership of your work, and an eagerness to learn from and be mentored by senior teammates
• Comfortable with AI-assisted development workflows — using modern AI tools productively while critically validating their output
• English Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team

• Availability to work EU business hours shifted 2–3 hours later for daily overlap with US West Coast mornings
   

  Desired Skills

• C++ experience — reading or writing performance-sensitive native code
• Exposure to database internals or query planning
• Familiarity with distributed systems concepts: concurrency control, data replication, storage systems 
• Middle Software Engineer – Catalog, EDM
• Apache Iceberg or other open table formats (Delta Lake, Hudi)

• Messaging systems: Kafka, NATS, or cloud pub/sub servicesи Contributions to open-source projects (Apache projects especially valued)
   

  Details

• Engagement: Long-term contract
• Location: Europe (EU / EEA / UK), remote
• Working hours: EU business hours, shifted 2–3 hours later for daily overlap with the US West Coast team

ABOUT US

We are a US e-commerce company. We run the whole business on one internal web panel that we build ourselves: orders, customer support, call center, hiring, analytics, and ad production with AI video and image models. It is live and the team uses it every day.

THE ROLE

You will be the developer who owns this panel. The founder gives you the idea and a clear "done when". You plan it, build it with AI coding agents (Cursor), review what the agent wrote, test it, and ship it.

This is not a prompt-only job. The agent writes a lot of the code, but you are the one who reads the diff, finds the bug, and says no to a bad change.

STACK

• Next.js and TypeScript
• Supabase (PostgreSQL, SQL migrations)
• Vercel, Cloudflare R2
• A background job queue on a Linux VPS
• External AI APIs (video, image, LLM)
• GitHub with a protected main branch and pull requests

YOU ARE A GOOD FIT IF

• You have 3+ years of real web development with React or Next.js.
• You can write SQL and TypeScript by hand, without an AI tool.
• You use AI coding agents every day and you know where they fail.
• You can explain a technical problem in three simple sentences.
• You write clear English.
• You can work full-time for one company.

NOT A FIT

• Agencies and teams. We hire one person.
• People who can only prompt and cannot read the code.
• People with several other clients at the same time.

HIRING PROCESS

1. A 14-minute online test (code reading, multiple choice). We send you the link in chat right after you apply.
2. A 20-minute written test (a small function, one SQL query, three short answers).
3. A short live call with screen share.

We do not read CVs first. The test decides who moves on, and we reply to everyone who passes step 1.