Jobs at Djinni

About Vestox Digital

Vestox Digital is a London-based Media Buying Agency founded by a Ukrainian team with 8 years of experience in affiliate marketing and media buying. We focus exclusively on White Hat verticals and long-term partnerships with direct advertisers, building sustainable traffic acquisition systems that scale across Tier-1 markets and multi-million-dollar budgets.

We treat great media buyers as business partners, not employees: significant performance-based upside, direct access to decision-making, and the chance to grow with the company from its earliest stage.

We're looking for a results-driven, independent and confident Google Media Buyer (Middle/Senior) who doesn't just run traffic, but builds efficient marketing that makes serious money.

What you'll be doing

• Generating profit with 40%+ ROI on daily budgets of $5k+ across Google Ads (Search/Demand Gen) and Microsoft Ads on White Hat Ecom/Nutra offers (CPA/CPL/RS models);
• Constantly generating new hypotheses, approaches and funnels, and testing them;
• Researching the market and analyzing emerging trends;
• Keeping strict, day-to-day control of budgets and your own KPIs.

What we're looking for

Must have:

• 2+ years of hands-on experience with Google Ads;
• 1+ year in the Affiliate industry (traffic arbitrage) or DTC products;
• 1+ year working with Ecom and/or Nutra verticals (White Hat);
• Recent, verifiable success cases with $30k+ monthly profit on Google Ads;
• Solid grasp of Performance and DTC metrics (EPC/RPC/CVR/EVR/CTC, etc.), with the ability to analyze them in depth and make decisions based on the data;
• Experience with trackers and analytics tools (GA, Clarity, Tableau, Campaignswell + ClickFlare/PeerClick/Voluum, etc.);
• Deep understanding of Google Ads/Microsoft Ads advertising policies and how to apply them when launching affiliate offers;
• Ability to independently select offers, build and test hypotheses, analyze results and scale profitable setups;
• English level B2+.

Nice to have:

• Experience with Microsoft Ads (Bing Ads);
• Ability to create pre-landers (LanderLab/Duda/ClickFunnels) and creatives (Creatify/Pixlr/GoogleFlow/Canva) on your own;
• Google Merchant Center and GTM setup skills.

What we offer

• 💰 A motivation system that's unique for the White Hat space, with the potential to earn 4-figure amounts within your first months;
• 🎯 Proven, private offers with strong payouts, high-converting funnels and a ready-built infrastructure tailored specifically to Ecom/Nutra PPC;
• 🤝 Direct access to the CEO: implement your own ideas without red tape and resolve issues in real time;
• 🌍 Fully remote work, B2B contract;
• 📈 A clearly defined growth path up to Team Lead / Head of Media Buying / CPO for those who want it and can deliver.

How to apply

Send us your CV along with a short description of your best case from the last 3 months (vertical, GEO, daily budget, ROI, etc.). Please start your case description with the words "White Hat" so we know you've read everything carefully.

#MediaBuyer #GoogleAds #PPC #AffiliateMarketing #PerformanceMarketing #Ecommerce #Nutra #Remote #DTC #TrafficArbitrage

About the role

Billease operates consumer lending, merchant checkout, and digital banking products handling sensitive financial and personal data at scale. We run a cloud-native, microservices architecture on AWS/EKS, built primarily in Go and Python, backed by PostgreSQL/Aurora, Kafka, and ClickHouse, with native Android and iOS apps.

We're looking for a hands-on Senior Cybersecurity Specialist who can break our systems before anyone else does — and then help us build them so they can't be broken. This is a deeply technical, offensive-minded role that also drives secure-by-design practices across engineering. You'll run penetration tests, hunt for exploitable flaws across our apps, APIs, protocols, and infrastructure, and bring a modern, AI-augmented approach to finding and triaging security issues at scale.

This is an individual-contributor role with significant influence. You will not be managing a team — you will be the person engineers and leadership turn to for the hard security questions.

What you'll do

• Plan and execute penetration tests and red-team exercises against web apps, mobile apps, APIs, microservices, cloud infrastructure, and internal tooling.
• Perform mobile application security testing (Android & iOS) — static and dynamic analysis, runtime instrumentation, SSL pinning bypass, local storage and secrets review, and reverse engineering.
• Discover and prove exploitability of vulnerabilities across network and application protocols (TLS, HTTP/2, gRPC, OAuth2/OIDC, SAML, WebSocket, DNS, mTLS), producing working PoCs and clear remediation guidance.
• Review cryptographic implementations — key management, TLS configuration, token signing/encryption, data-at-rest and in-transit protections — and catch misuse of crypto primitives.
• Conduct secure code review (Go/Python) and threat modeling for new services and features; embed security gates into our GitLab CI/CD pipelines.
• Build and operate AI-assisted security workflows — automating recon, triage, code analysis, and vulnerability detection to scale coverage across ~85 engineers' output.
• Harden our AWS/EKS environment: IAM, network segmentation, Kubernetes security posture, container and supply-chain security, secrets management.
• Lead vulnerability management — prioritize, track, and verify remediation; reduce false positives and mean-time-to-fix.
• Support compliance and regulatory needs (PCI DSS, BSP requirements, Data Privacy Act / NPC) with evidence, controls testing, and risk assessments.
• Respond to incidents: investigate, contain, perform root-cause analysis, and drive preventative fixes.
• Mentor engineers and raise the organization's overall security maturity through guidance, tooling, and training.

Core requirements

Experience

• 5+ years in offensive security, application security, or security engineering, with a strong hands-on penetration-testing background.
• Demonstrated track record of finding, exploiting, and responsibly reporting real vulnerabilities (CVEs, bug bounty, or documented engagements a plus).
• Experience securing cloud-native, microservices environments in production — ideally fintech, banking, or another regulated, high-trust domain.
•  

Hands-on experience with security tooling

You should be fluent with the categories below and the leading tools in each (we don't expect every single tool, but we expect deep command of most categories):

Web app testing

Burp Suite (Pro), OWASP ZAP, Nikto, sqlmap, Acunetix

Network & vuln scanning

Nmap, Nessus, OpenVAS, Qualys, Nexpose, Masscan

Exploitation / red team

Metasploit, Cobalt Strike, Sliver, Impacket, BloodHound

Mobile security

MobSF, Frida, Objection, Drozer, apktool, jadx, Hopper, Corellium, Xcode/Android Studio

Reverse engineering

Ghidra, IDA Pro, radare2 / Cutter, Binary Ninja

Fuzzing

AFL++, libFuzzer, boofuzz, Jazzer

SAST / DAST / SCA

Semgrep, SonarQube, Checkmarx, Fortify, Snyk, Bandit (Python), gosec (Go)

Cloud & Kubernetes security

Prowler, ScoutSuite, kube-bench, kube-hunter, Falco, Trivy, Checkov, tfsec/Terrascan

Container & supply chain

Trivy, Grype, Clair, Anchore, Cosign / Sigstore

Secrets scanning

Gitleaks, TruffleHog

Traffic & protocol analysis

Wireshark, tcpdump, mitmproxy

Credential attacks

Hashcat, John the Ripper, Hydra

SIEM / detection

Splunk, Elastic Security (ELK), Wazuh

Mobile application security testing

• Proven experience testing Android and iOS apps end to end.
• Static and dynamic analysis, runtime hooking/instrumentation (Frida/Objection), SSL/TLS pinning bypass, tamper and root/jailbreak-detection analysis.
• Reverse engineering of APKs/IPAs; review of insecure local storage, hardcoded secrets, insecure IPC, and deep-link abuse.

• Familiarity with the OWASP MASVS / MASTG mobile security standards.

   

Security standards & frameworks

• OWASP — Top 10, ASVS, API Security Top 10, MASVS/MASTG, SAMM.
• PCI DSS (critical for our payment and lending flows).
• NIST — CSF, SP 800-53, SP 800-63 (digital identity).
• ISO/IEC 27001 / 27002, CIS Controls & Benchmarks, SOC 2.

• Awareness of BSP regulatory expectations and the Philippine Data Privacy Act (RA 10173 / NPC).

   

Cryptography

Solid, practical understanding of modern cryptography and, just as importantly, how it gets misused:

• Symmetric: AES (GCM, CBC, modes & IV/nonce pitfalls), ChaCha20-Poly1305.
• Asymmetric: RSA, ECC (ECDSA, EdDSA/Ed25519, ECDH).
• Hashing & KDFs: SHA-2/3, HMAC, bcrypt, scrypt, Argon2, PBKDF2.
• Key exchange & PKI: Diffie-Hellman/ECDH, TLS 1.2/1.3, certificate lifecycle, mTLS.
• Tokens: JWT/JWS/JWE — signing, encryption, and common vulnerabilities (alg confusion, weak keys, replay).

• Key management and secrets with AWS KMS / HSM.

   

Protocol exploitation

• Ability to analyze and find exploitable flaws in network and application protocols: TCP/IP, TLS/SSL, HTTP/HTTPS, HTTP/2, gRPC, WebSocket, DNS, mTLS.
• Attacking authentication/authorization protocols — OAuth 2.0, OIDC, SAML (token theft, scope abuse, redirect and confusion attacks).

• API security testing across REST, GraphQL, and gRPC (IDOR/BOLA, mass assignment, injection, rate-limit and business-logic abuse).

   

AI-driven security (advanced specialty)

We want someone who treats AI as a force multiplier for security work — not a buzzword. You should be able to demonstrate a concrete AI workflow for finding a security issue. For example:

Example workflow we'd expect you to speak to (or demo live):

1. Ingest a target service's source (Go/Python) and OpenAPI/proto definitions.
2. Agentic analysis — drive an LLM agent (e.g., via scripted tool-calling) to map data flows, identify untrusted inputs, and flag candidate vulnerability classes (injection, auth bypass, SSRF, IDOR).
3. Correlate LLM findings against SAST output (Semgrep/gosec/Bandit) to cut false positives and rank by exploitability.
4. Generate and validate a PoC — have the agent draft an exploit request, run it against a staging target, and confirm the issue dynamically.

5. Produce a remediation diff and a human-readable report

    

Additional AI-security expectations:

• Using LLMs for code review, log/anomaly triage, and detection-rule generation.
• Understanding LLM/AI system security itself — prompt injection, data exfiltration, model/supply-chain risks (OWASP Top 10 for LLM Applications), relevant to our own AI features.

Programming

• Strong Python or \ Go skills — you build your own tooling, automate testing, and read/debug our production services. (Our stack is Go + Python, so you'll be reviewing real code, not just running scanners.)
• Comfortable with Bash, Git/GitLab CI, Docker, and Kubernetes manifests.

Nice to have

• Prior experience in fintech, banking, or payments under PCI DSS.
• Bug bounty track record or published research / CVEs.
• Experience with Kafka, ClickHouse, or event-driven architectures from a security standpoint.
• Detection engineering and threat hunting experience.
• Infrastructure-as-code security (Terraform) and cloud security automation.

What success looks like (first 6 months)

• Delivered at least one full-scope pentest across our mobile + API surface with prioritized, remediated findings.
• Security gates integrated into CI/CD with measurably fewer false positives.
• A working AI-assisted triage/analysis workflow in use by the team.
• A clear, risk-ranked view of our top vulnerabilities and a tracked path to closing them.

About Us
Fintech Harbor Consulting is an international legal advisory firm focused on the FinTech sector. We help clients worldwide with company incorporation, licensing, banking, and ongoing legal support. With over 8 years in the industry and a strong marketing pipeline, we're expanding our sales team.

Who We’re Looking For
If you have at least 3 years of sales experience and are ready to grow in a structured, professional environment - we’d love to hear from you. A background in FinTech, legal services or B2B sales is a big plus. 

While we’re not considering entry-level candidates at this time, we welcome driven professionals who are eager to learn, communicate effectively and consistently convert leads into results.

What You’ll Do

• Manage inbound and outbound client inquiries (calls, chats, emails)
• Conduct online meetings and introductory calls with clients
• Work with objections and clarify client needs
• Qualify leads (hot/warm/follow-up)
• Re-engage with past leads
• Closely collaborate with our legal team

• Use CRM, Gmail, Excel and Word to track client progress and reporting

  
   

Requirements

• Minimum 3 years of experience in sales
• Experience in face-to-face or voice sales communication is MUST. 
• Fluent spoken and written English
• Strong communication and organizational skills
• Confidence in using CRM, Excel and Word
• Available for international travel and participation in trade shows, exhibitions, conferences, and industry forums
• Spanish proficiency is considered an advantage
  
   

What We Offer

• Structured onboarding and step-by-step training with daily support
• Transparent KPIs, performance-based bonuses (%) and additional corporate benefits
• Collaborative team of experienced professionals who’ve grown through the same journey
• Clear path for long-term growth within a supportive framework

Why Join PwC SDC Lviv Assurance? 

Build an international assurance career without leaving Ukraine. 

At PwC SDC Lviv, you will support CSRD and sustainability assurance engagements for clients across Central and Eastern Europe, collaborate daily with international engagement teams, and gain exposure to sustainability reporting alongside financial audit methodology. 

This role offers an opportunity to broaden your financial and CSRD audit experience, strengthen your business English skills, and accelerate your growth towards Senior Associate and future leadership roles, all while working in an environment that values flexibility, well-being, and work-life balance.
 

What Makes This Role Different? 

Unlike many traditional audit positions in the Ukrainian market, this role offers: 

• CSRD and sustainability assurance engagements across multiple CEE territories 
• European client exposure without relocation 
• Daily collaboration with international engagement teams 
• An opportunity to combine financial audit skills with a growing sustainability assurance specialism 
• Practical business English development through everyday interaction with international teams 
• International mobility opportunities, including training programmes, workshops, and short-term secondments 
• Fully sponsored ACCA qualification support 
• Experience with modern audit technologies, AI-enabled tools, automation, and data analytics 
• Access to PwC's global learning ecosystem and development programmes 
• Flexible working environment focused on work-life balance 
• Clear career progression towards Senior Associate and beyond 

Your Impact 

You will contribute to high-quality CSRD and sustainability assurance engagements for international clients across the CEE region. 

You will perform assigned assurance procedures, analyse sustainability and financial information, prepare clear documentation and continue developing the technical and professional skills required for future career growth. 
 

What You Will Do:

• Perform assigned sustainability assurance procedures in line with reporting frameworks, assurance standards, PwC methodology and team instructions 
• Support planning by understanding the client’s business, sustainability reporting processes and controls 
• Test sustainability disclosures, KPIs and supporting data within assigned areas 
• Support process and control walkthroughs, documenting key steps and findings 
• Analyse sustainability and financial data, flagging inconsistencies and unusual trends 
• Prepare clear, accurate and timely documentation meeting PwC quality standards 
• Communicate with international teams and track assigned tasks 
• With guidance, clarify client requests and obtain support for defined areas 
• Integrate sustainability considerations into assurance procedures with the team 
• Support onboarding and knowledge sharing for Associates and Interns 
• Contribute to automation and innovative assurance solutions 

What You Will Gain 

• International CSRD Assurance Experience – Work on CEE sustainability assurance engagements and collaborate directly with experienced professionals across the PwC network. 
• Sustainability Expertise – Build practical knowledge of sustainability reporting, assurance procedures, disclosures, KPIs, processes and controls. 
• European Exposure Without Relocation – Build an international career while remaining based in Ukraine.  
• Work-Life Balance – Grow in an environment that supports flexibility, well-being, and sustainable career development.  
• ACCA Qualification Support – Benefit from PwC's fully sponsored ACCA programme and structured learning support.  
• Practical Business English Development – Strengthen your communication skills through daily interaction with international teams.  
• Modern Audit Technologies – Gain experience with audit technologies, automation tools, data analytics, and AI-enabled methodologies.  
• Competitive Reward Package – Receive competitive compensation, performance-related bonuses, and recognition opportunities.  
• Comprehensive Benefits – Access healthcare, well-being programmes, learning opportunities, and a broad range of PwC benefits. 

What We Are Looking For:

Experience: 1-3 years of experience in external audit. Previous CSRD, ESG, sustainability reporting or assurance experience is an advantage, but strong motivation to develop in this field is equally welcome. 

Education: university degree in Accounting, Finance, Economics, Sustainability, Environmental Studies or related field. 

Language: English at B2 level. 

Technical Skills: 

• Understanding of accounting and auditing standards. 
• Strong Excel skills. 
• Experience performing substantive testing and audit documentation. 
• Interest in technology-enabled auditing and data analytics. 

Personal Attributes: 

• Analytical mindset. 
• Attention to detail. 
• Strong communication skills. 
• Eagerness to learn. 
• Team-oriented approach. 

Ready to Take the Next Step? 

Join PwC SDC Lviv Assurance and build an international career at the intersection of financial audit and sustainability assurance. 

Work on European CSRD engagements, collaborate with international teams and develop expertise in a rapidly growing assurance field while remaining based in Ukraine. 

Apply today and take the next step towards an international career in CSRD and sustainability assurance with PwC. 

https://www.pwc.com/ua/uk/about/privacy.html

You’ll be responsible for

• Optimize the entire user journey with a strong focus on user activation and the complete post-purchase lifecycle to drive retention and maximize key product metrics.
• Drive qualitative improvements and lead rigorous experimentation across a diverse portfolio of white-hat mobile products in various niches to achieve strategic goals, particularly focusing on Retention and LTV.
• Develop and test new user retention mechanics to ensure long-term engagement.
• Analyze user behavior to identify actionable opportunities for increasing retention and engagement, optimizing processes and driving qualitative changes.
• Evaluate competitors, user needs, and market trends, uncovering deep insights based on product analytics to drive strategic changes.
• Collaborate with cross-functional teams to delve into funnel and product analytics, identifying areas for improvement and implementing data-driven strategies to enhance overall performance.
• Work hands-on with Tableau and our Data Lake to find root causes, set up tracking control points, and automate reporting.
• Mentor and navigate teams by helping them spot bottlenecks, find actionable insights, and set clear objectives.

What we expect from you

• 5+ years of experience working as a Product Manager/Owner/Retention Manager in B2C products with mobile applications (subscription monetization models, w2a, Tier-1).
• Having focused, proven experience specifically working on user activation and retention mechanics — must have.
• Deep understanding of operating in a highly performance-marketing-driven environment.
• Solid experience in working with data, including conducting and analyzing A/B tests.
• Proven ability to effectively analyze user feedback and the competitive environment.
• Practical experience working directly with retention and engagement mechanics in mobile products.
• Strong team player with a proactive mindset and initiative in finding opportunities to improve.
• Data-driven approach combined with an ownership mindset, taking full responsibility for the results.
• You can demonstrate real-world case studies of successfully recovering product metrics during crises.
• Upper-Intermediate or higher level of English proficiency.

Hiring Process

Stage 1: Interview with HR (1h).
Stage 2: Interview with C-level.

What we offer for your success

• Monthly bonus system based on key metrics.
• Very warm and friendly working environment and flexible working schedule.
• 20 days off + paid national holidays, and 12 sick days paid by the company per year.
• Medical insurance, and health protection programs.
• Continuous professional development and growth opportunities.

We are not just a company, we are Clario! We put the customer at the heart of all that we do, we achieve our best together, take responsibility, and challenge our limits to create a difference!

To apply for this position, please send your CV (in English only) with a detailed description of your career, experience, skills, and projects. We guarantee the privacy of any information received.

LET’S GO TOGETHER!

N-iX is looking for a Middle QA Engineer to join our team!

Our client is a leading financial institution driving digital transformation across its core products. You will join the Digital Technology Product Organization (DTPO), working in a cross-functional Agile squad to build and maintain next-generation mobile banking solutions. The team focuses on delivering secure, stable, and seamless mobile experiences for millions of users.

Responsibilities

• Perform mainly manual and automated testing of mobile applications (iOS & Android);
• Work with tools such as Charles Proxy (or similar) for traffic inspection and debugging;
• Analyze logs and identify issues across multiple environments;
• Create and maintain test documentation (Test Plans, Test Strategies, Test Cases);
• Develop and maintain automated test scripts using Java, Kotlin, Appium, Selenide, and Rest Assured;
• Collaborate with developers, product owners, and other QA engineers within Agile squads;
• Participate in regression, smoke, and exploratory testing;
• Test using real devices, emulators, and device farms:
• Approx. 80% manual and 20% automation testing (subject to change based on project needs and priorities).
  
   

Requirements

• 3+ years of experience in software testing (manual and automation);
• Strong knowledge of testing methodologies, test design techniques, and QA best practices;
• Hands-on experience with Java, Appium, Kotlin, Selenide, and Rest Assured;
• Experience with Charles Proxy or similar tools (e.g., Fiddler, Proxyman) for traffic and network debugging;
• Solid understanding of mobile platforms, CI/CD pipelines, and logging systems;
• Experience working in Agile/Scrum environments;
• Good analytical and problem-solving skills;
• Intermediate+ level of English:
• Upper Intermediate+ level of Ukrainian.

N-iX is looking for a Middle QA Engineer to join our team!

Our client is a leading financial institution driving digital transformation across its core products. You will join the Digital Technology Product Organization (DTPO), working in a cross-functional Agile squad to build and maintain next-generation mobile banking solutions. The team focuses on delivering secure, stable, and seamless mobile experiences for millions of users.

Responsibilities

• Perform mainly manual and automated testing of mobile applications (iOS & Android);
• Work with tools such as Charles Proxy (or similar) for traffic inspection and debugging;
• Analyze logs and identify issues across multiple environments;
• Create and maintain test documentation (Test Plans, Test Strategies, Test Cases);
• Develop and maintain automated test scripts using Java, Kotlin, Appium, Selenide, and Rest Assured;
• Collaborate with developers, product owners, and other QA engineers within Agile squads;
• Participate in regression, smoke, and exploratory testing;
• Test using real devices, emulators, and device farms:
• Approx. 80% manual and 20% automation testing (subject to change based on project needs and priorities).
  
   

Requirements

• 3+ years of experience in software testing (manual and automation);
• Strong knowledge of testing methodologies, test design techniques, and QA best practices;
• Hands-on experience with Java, Appium, Kotlin, Selenide, and Rest Assured;
• Experience with Charles Proxy or similar tools (e.g., Fiddler, Proxyman) for traffic and network debugging;
• Solid understanding of mobile platforms, CI/CD pipelines, and logging systems;
• Experience working in Agile/Scrum environments;
• Good analytical and problem-solving skills;
• Intermediate+ level of English:
• Upper Intermediate+ level of Ukrainian.

SBC Performance drives scalable growth for brands ready to expand globally.

Working across eCommerce, health & wellness, education, and entertainment, our team helps brands acquire customers faster and scale across 26+ global markets. We combine data-driven paid media, performance creative, and advanced analytics to turn marketing into a predictable revenue engine.
Trusted by 200+ companies, managing $150M+ in ad spend.

Scale faster. Grow smarter.
 

Right now, we're looking for a Python Full Stack Developer to join our Product & Engineering Team and help build a scalable AdTech and AI-powered platform.

Key Responsibilities:

• Implement server-side (backend) logic according to technical requirements and product specifications.
• Develop and maintain backend services using Python (FastAPI) and asynchronous architectures.
• Design, implement, and optimize REST and GraphQL APIs, including integrations with external systems.
• Build and evolve frontend applications with Angular (v16–18), NgRx, and PrimeNG.
• Work with relational and NoSQL databases, including data modeling, query optimization, and migrations.
• Integrate external services and APIs (AI services, advertising platforms, cloud storage, media processing).
• Participate in architectural discussions and contribute to technology and design decisions.
• Ensure technical documentation remains up to date (README files, diagrams, API specifications).
• Collaborate with product, data, QA, and DevOps teams to deliver reliable, scalable solutions.

Requirements:

• 3+ years of experience with Python in production
• Hands-on experience with PostgreSQL (asyncpg, SQLAlchemy async, Alembic) and MongoDB (Motor); ability to design schemas and optimize queries.
• Experience implementing authentication and security (JWT, bcrypt, passlib).
• Background processing and messaging using Celery, Redis, and/or Pub/Sub–style queues.
• Experience integrating external APIs and services, including AI services (OpenAI), advertising platforms, and cloud storage.
• Familiarity with Google Cloud Platform, containerization (Docker, Docker Compose), and basic Nginx configuration.
• Understanding of scalable system design, async error handling, and performance optimization.
• Ability to participate in architectural discussions, make technical decisions, and maintain clear technical documentation (README, API specs).
• English level of B2 or higher

What We Offer

• Hybrid job in Prague/Warsaw or remote
• Competitive compensation
• Flexible working hours: we start our operation day between 9:00 — 11:00 CET
• All necessary equipment
• Paid vacation and sick leaves
• Educational support: reimbursement of certification, training, and a knowledge-sharing atmosphere
• Company events and multiple internal activities
• Open feedback and transparent direct communication

Privacy Notice: https://sbc-performance.com/notice-privacy-for-recruitment/

ZentixSoft is looking for a Senior Data Scientist! 🚀

Format: Full-Time Outstaffing, long-term engagement.

Location: Poland-based (Remote with readiness for occasional client meetings in Warsaw).
 

🧩 Responsibilities:

• End-to-End Ownership: Own modeling from problem definition to production deployment, analyzing multivariate time-dependent data for forecasting and classification.
• Feature Engineering: Build complex features around seasonality, lead-lag effects, weather impact, and regional supply chain dynamics.
• Model Benchmarking & Validation: Design and evaluate XGBoost, LightGBM, ARIMA, and deep learning sequence models using temporal cross-validation, uncertainty estimation, and explainability frameworks.
• Production Deployment: Productionize batch and API models on GCP alongside data engineers, implementing drift monitoring and retraining pipelines.
• Modern AI Integration: Prototype LLMs and AI agents where relevant for automated insights.
• Business Impact: Present quantitative findings, trade-offs, and metrics clearly to business stakeholders and non-technical decision-makers.
   

🎓 Our Perfect Match (Requirements):

• Commercial DS Experience: 5+ years in Data Science, applied ML, or quantitative analytics.
• Core ML & Data Stack: Advanced Python (Pandas, NumPy), ML frameworks (XGBoost / LightGBM / PyTorch / TensorFlow), and SQL.
• Cloud & Data Warehouse: Hands-on experience with Google Cloud Platform (GCP) and BigQuery is a MUST.
• Time-Series Expertise: Proven track record in time-series forecasting with concrete quality metrics (e.g., MAPE, RMSE, WAPE) in real-world environments.
• Location & Mobility: Candidate MUST be based in Poland and willing to visit Warsaw occasionally for client meetings.
• Communication: Fluency in English with the ability to explain complex quantitative models in business terms.
   

➕ Nice to Have:

• Experience with weather, geospatial, commodity, or supply-chain data.
• Bayesian methods, probabilistic forecasting, causal inference, or optimization.
• Production experience with LLMs or AI agents.
• GCP Data Scientist / ML Engineer certifications.
   

📍 Project Details:

⏳ Format: Full-Time, long-term outstaffing.

📍 Location: Remote in Poland (with occasional trips to Warsaw).

About the vacavncy:

We are a young and rapidly growing company with almost 200 highly skilled developers of various levels.  As this opportunity requires working from our office, it is open exclusively to Lviv residents. 

We offer free English language courses for employees. Also we provide free corporate housing for our employees from other cities.

What we expect from the candidate:

- Experience in building responsive user interfaces and designs using HTML/CSS.
- Solid knowledge of JavaScript and React/Next.js.
- Understanding of the latest trends and best practices in front-end development.
- Ability to use dev tools, debugger and package managers (npm, yarn).
- Basic understanding of REST principles.
- Experience with Git.
- Knowledge of how to effectively use GitHub during teamwork.
- Excellent communication skills and a collaborative mindset, ability to work with   minimum supervision.
- Knowledge of React will be a plus.
- English level B1 - the ability to communicate with clients, to read and understand documentation in English.

What we offer:
- Personal corporate English language academy
- Flexible and accommodating working hours.
- Welcoming and amiable work environment in a comfortable office space.
- Official employment with a competitive salary that reflects your experience and skills.
- A supportive team of seasoned developers and managers.
- Exciting opportunity to contribute to innovative projects.

Sales Manager

US Market | Remote

We’re looking for a B2B Sales Manager to sell premium sponsorship and media packages to companies and brands across the US.

If you’re confident with cold outreach, reaching decision-makers, negotiating, and closing deals, we’d love to hear from you.

What we’re looking for:

• 1+ year of B2B sales experience

• Strong cold outreach & closing skills

• English — C1

• Experience working with US clients

• Confident communication & negotiation skills

• Self-driven and results-oriented

Experience in media, advertising, sponsorships, events, PR, or marketing sales is a plus.

💰 Compensation

10% commission on every successfully closed and paid deal.

Examples:

$5,000 deal → $500 commission
$10,000 deal → $1,000 commission
$20,000 deal → $2,000 commission

Unlimited earning potential.

💰 Compensation: 10% commission on every closed & paid deal

📦 Deal size: $750–$20,000

🌎 Schedule: Full-time, aligned with US Eastern Time business hours

🏠 Format: Fully remote

🤝 Contract: Independent Contractor

🚀 Unlimited earning potential

Description

Our client is an innovative U.S. medical device manufacturer that produces devices and software applications.

The project focuses on the development, maintenance, and enhancement of a healthcare technology platform that supports remote diagnostic testing, patient monitoring, and medical reporting.

The platform enables healthcare providers and diagnostic service organizations to manage diagnostic workflows, including test ordering, patient data collection, result processing, and report generation.

Requirements

• Create, edit, update, and maintain project-related documentation
• Work closely with development, testing, and product teams to ensure the quality, discoverability, and accuracy of the content created or updated
• Work with different document control tools to process project-related documentation
• Documentation releasing
• Localization

Job responsibilities

• 5+ years of experience in writing technical documentation
• Philological or technical background
• Excellent command of English (Advanced +)
• Excellent written and verbal communication skills
• Proofreading and editing skills
• Analytical skills
• Team player
• Experience in Healthcare domain would be a plus

About the role

We are looking for a Senior Backend Engineer to join Proxet and contribute to a long-term engagement with a UK-based technology company developing simulation and decision-support solutions for governments and enterprises.

 

Who are we looking for?

Skills & Experience

• 7+ years of professional software engineering experience, with strong hands-on expertise in Python backend development.
• Experience building and maintaining production services, APIs, and integrations.
• Good understanding of distributed systems, microservice architectures, and asynchronous data processing.
• Experience with relational databases, preferably PostgreSQL, including schema design, query optimisation, and troubleshooting.
• Experience with data ingestion, processing pipelines, and integration of external data sources.
• Practical experience deploying and troubleshooting applications using Docker and Kubernetes.
• Experience with CI/CD pipelines, Git workflows, and automated testing.
• Strong debugging skills and the ability to investigate issues across services, data flows, and deployment environments.
• Experience using AI coding assistants in development, with the ability to review, validate, and take responsibility for generated code.
• Experience communicating directly with customers or external stakeholders to clarify requirements and resolve technical questions.
• Ability to explain technical concepts clearly to non-technical audiences and translate operational needs into engineering tasks.
• Strong ownership, sound technical judgement, and comfort working with evolving requirements.
• Understanding of the Ukrainian context and confidence in communicating with local organisations.
• Professional proficiency in Ukrainian and English for customer meetings, technical discussions, and written communication.
• Willingness and ability to travel to customer sites within Ukraine.

Nice to have

• Hands-on experience with Kafka publishers and consumers.
• Experience with Dagster or similar data orchestration tools.
• Experience working with public-sector organisations, local authorities, or infrastructure operators.
• Experience adapting and deploying software in customer-managed or private-cloud environments.
• Familiarity with GCP, AWS, or Azure.
• Experience with Helm, OpenShift, and shell scripting.
• Familiarity with Parquet, object storage, and metadata management.
• Experience integrating AI agents, MCP interfaces, or LLM APIs.
• Familiarity with simulation platforms, digital twins, or decision-support systems.
• Knowledge of C++.

Responsibilities

• Design, develop, and maintain Python backend services and APIs supporting customer applications and simulation workflows.
• Work directly with customers and external organisations in Ukraine to understand their needs, operational processes, and local constraints.
• Participate in customer meetings, clarify requirements, and explain technical options and trade-offs.
• Translate customer needs into implementation tasks, data requirements, and integration specifications.
• Adapt existing platform capabilities to local use cases and share customer insights with the wider engineering and product teams.
• Build and maintain data ingestion and processing pipelines using Dagster.
• Integrate customer data sources with platform services and containerised simulation models.
• Work with Kafka publishers and consumers to process simulation outputs.
• Design and optimise PostgreSQL schemas and queries, and support appropriate data storage solutions.
• Build reusable backend components and identify opportunities to apply customer-specific improvements across other deployments.
• Contribute to deployment and troubleshooting of containerised applications in Kubernetes-based environments.
• Maintain automated tests and CI/CD workflows to support reliable delivery.
• Collaborate with frontend engineers, platform specialists, modellers, and delivery stakeholders.
• Participate in code reviews and technical design discussions, documenting decisions and integration approaches.
• Use AI development tools effectively while maintaining code quality, correctness, and maintainability.
• Communicate progress, dependencies, and technical issues clearly to both internal teams and customer stakeholders.

🔴 about the company
whiteout is an international media buying agency born in Ukraine, specializing in the gambling and betting verticals. backed by venture capital, they’ve already established digital activity across 30+ countries — from latam to southeast asia. 
at their core, they’re a team of passionate igaming experts. energetic, ambitious, and laser-focused on results — we move fast, think big, and never settle. 
if you’re hungry to grow and thrive in a high-performance environment, you’ll feel right at home with them.
 

🔴 the role
as we scale, we are seeking an Junior Finance Specialist.
 

🔴 what you will be working on

• managing treasury operations, including fiat and crypto payments, financial transactions, and day-to-day payment processes;
• managing accounts payable and accounts receivable, ensuring accurate financial settlements;
• reconciling balances with partners, verifying financial calculations, and resolving discrepancies and overdue payments;
• handling financial transactions for international legal entities (UK and UAE);
• supporting the preparation of financial and management reports in collaboration with the finance team.
   

🔴 your background

• 1 + years of experience in audit, accounting, financial analysis, or a related finance function;
• advanced Excel skills and a proven ability to drive process improvements, even in high-resistance environments;
• english — B1 or B2 level.
   

🔴 what we offer:

• flexibility and freedom: choose fully remote, hybrid, or office-based work yourself;
• strong team: work alongside some of the industry’s top talent;
• career development: take courses, attend top-notch conferences;
• health support: paid vacation and sick leaves, and access to a corporate psychologist;
• corporate culture: enjoy off site parties, team-buildings, sport events, and corporate gifts.
   

let`s talk.

Must Have Skills:

- Excellent written and spoken English (Upper-Intermediate and higher);

- A strong desire to study IT subject field;

- Strong written and verbal communication skills;

- High communication availability (be always in touch with clients and upper-management);

- High stress resistance and ability to manage multiple tasks in a fast-paced environment.

Nice to Have:

- Basic personal experience as a developer/QA/PM and deep understanding of software development process;

- Proven experience of direct communication with foreign clients.

As a project manager you will:

- Manage multiple web development projects;

- Solve workflow and technical issues (in collaboration with tech specialist);

- Build and maintain strong, long-lasting relationships with clients;

- Negotiate contracts and close agreements to maximize profits.

We offer:

- Competitive salary pegged to the USD; We offer $600 salary + performance-based bonuses;

- Work on interesting projects using the latest technologies;

- Permanent help and support from our Tech Leads;

- Paid Vacation;

- Conscious senior management, who help, hear and encourage to act;

- English classes compensation package.