Jobs at Djinni

We are looking for an experienced Data Researcher / Lead Generation Specialist to support our outbound marketing and sales activities.

Your main responsibility will be to research target companies and decision-makers, collect and verify contact data, and prepare accurate lead lists for outbound campaigns.

Responsibilities

• Research companies and decision-makers based on predefined ICPs and targeting criteria.
• Build and enrich lead lists using LinkedIn Sales Navigator, email finders, verification tools, and other data research platforms.
• Find, verify, and maintain accurate contact and company information.
• Enrich leads with additional data required for segmentation and personalization.
• Prepare lead lists for cold email, LinkedIn outreach, and ABM campaigns.
• Research relevant business signals such as hiring activity, company growth, funding, technologies, and other triggers.
• Maintain clean and structured lead data in HubSpot.
• Work closely with the marketing and outbound teams to improve targeting and data quality.

Requirements

• 1–2 years of hands-on experience in data research, lead generation, or a similar role.
• Hands-on experience with LinkedIn Sales Navigator and CRM platform.
• Experience using different email finders, email verification tools, and lead research platforms.
• Strong Google Sheets / Excel skills.
• English level B1 or higher.
• Strong attention to detail and ability to work with large datasets.
• Good online research and analytical skills.
• Ability to work independently and accurately follow targeting criteria.

Strong Advantage

• Previous experience in an IT outsourcing, software development, staff augmentation, or IT services company.
• Experience preparing data for cold email and LinkedIn outreach campaigns.
• Understanding of B2B ICPs, buyer personas, and outbound targeting.

JustMarkets is looking for a Senior ASO Specialist to join our Marketing team and drive the organic growth of our mobile applications across App Store and Google Play.

In this role, you'll be responsible for developing and executing ASO strategies, optimizing app store visibility, increasing organic installs, and improving conversion rates. You'll collaborate closely with Product and Design teams to enhance the performance of our mobile apps across multiple international markets.

Responsibilities

• Develop and execute ASO strategies for App Store and Google Play.
• Conduct keyword research and build semantic cores for multiple GEOs and languages.
• Optimize app metadata, including titles, descriptions, keywords, and visual assets.
• Plan, launch, and analyze A/B tests to improve app store conversion rates.
• Manage Product Page Optimization (PPO), Store Listing Experiments, Custom Product Pages (CPP), and Custom Store Listings (CSL).
• Monitor keyword rankings, organic visibility, and app store performance.
• Localize app store listings for different markets and languages.
• Collaborate with Product, Design, and Performance Marketing teams to improve app performance.
• Monitor user reviews and ratings, maintaining a high app rating (4.5+).
• Analyze competitors and identify opportunities to improve organic growth.

Requirements

• 3+ years of commercial experience in App Store Optimization (ASO).
• Hands-on experience with App Store Connect and Google Play Console.
• Strong knowledge of Keyword Research, Semantic Core development, and Metadata Optimization.
• Experience with A/B testing and Conversion Rate Optimization (CRO).
• Experience with Product Page Optimization (PPO), Store Listing Experiments, Custom Product Pages (CPP), and Custom Store Listings (CSL).
• Experience using ASO tools such as AppTweak, Sensor Tower, MobileAction, App Radar, or similar.
• Experience working with localization for multiple markets and languages.
• Strong analytical thinking and data-driven decision-making.
• Intermediate English or higher

Will be a plus

• Experience in FinTech, CFD/Forex, Crypto, iGaming, or other mobile-first products.
• Experience working with international mobile products across multiple GEOs.

We offer

• Opportunity to build and scale the ASO direction within an international FinTech company.
• Work on global mobile products across multiple international markets.
• 20 paid vacation days per year
• 10 paid sick leave days per year
• Public holidays as per the company's approved Public holiday list
• Medical insurance
• Opportunity to work remotely
• Professional education budget
• Language learning budget
• Wellness budget (gym membership, sports gear, and related expenses)

About ByChat FinOps

ByChat FinOps is a production-ready B2B AI platform that helps organizations understand, analyze, and optimize cloud infrastructure costs across AWS.

Our platform combines cloud billing data with Generative AI, enabling users to ask natural language questions such as:

• Why did our cloud costs increase this month?
• Which services generate the highest expenses?
• Will we exceed our budget next quarter?
• Where can we reduce infrastructure costs?
   

Behind the scenes, intelligent LLM Agents work with cloud APIs, read-only SQL queries, billing datasets, forecasting models, anomaly detection algorithms, and FinOps analytics to deliver accurate, explainable business insights.

ByChat FinOps is an actively growing production product where AI reliability, security, scalability, and measurable business value are our highest priorities.
 

About the Role

We are looking for a Senior / Lead ML Consultant to support our engineering team on a part-time basis and provide expert guidance on the architecture, development, evaluation, and optimization of our AI/ML capabilities.

This is primarily an advisory and technical leadership role rather than a full-time hands-on engineering position.

You will work closely with our AI/ML engineers and technical team, review existing approaches and processes, identify potential risks and inefficiencies, and provide practical recommendations for improving the quality, reliability, and efficiency of our AI systems.

We expect you to act as a senior technical advisor and sparring partner for the team, helping us validate technical decisions and ensure that our ML/LLM practices meet production-grade standards.
 

What You'll Do

Your responsibilities will include:

• Review the architecture and implementation of our AI/ML and LLM-based solutions.
• Provide regular technical feedback to AI/ML engineers and help validate key engineering decisions.
• Review existing ML/LLM development processes and recommend improvements.
• Evaluate the effectiveness, reliability, and scalability of current AI workflows.
• Advise the team on the design of LLM Agents, sub-agents, tool calling, structured outputs, and agentic workflows.
• Review approaches to prompt engineering, context management, guardrails, validation, retries, and hallucination mitigation.
• Assess and improve LLM evaluation methodologies, automated testing, golden datasets, and quality metrics.
• Advise on AI observability, tracing, monitoring, and production quality control.
• Review Text-to-SQL approaches and help ensure safe and reliable interaction with financial datasets.
• Provide guidance on anomaly detection, forecasting, and other ML components used within the platform.
• Identify performance bottlenecks and opportunities to optimize LLM latency, token usage, infrastructure usage, and operational cost.
• Help the team evaluate new AI/ML technologies, frameworks, models, and architectural approaches before introducing them into production.
• Participate in technical discussions and architecture reviews for complex AI-related features.
• Mentor engineers and help strengthen the team's ML/LLM engineering practices.
• Help establish practical engineering standards and best practices for building production-grade AI systems.
   

What We Expect

Must Have

• Strong senior-level commercial experience in Machine Learning / AI Engineering, ideally including technical leadership or consulting responsibilities.
• Proven experience designing and reviewing production AI/ML systems.
• Strong practical experience with modern LLM applications and Agentic AI systems.
• Deep understanding of:
  • LLM Agents and agentic workflows
  • Prompt Engineering
  • Function / Tool Calling
  • Structured Outputs
  • Context management
  • Hallucination mitigation
  • Guardrails and validation
  • Retry and fallback strategies
• Strong understanding of ML/LLM evaluation methodologies and how to measure AI system quality in production.
• Experience with AI observability, tracing, testing, and monitoring.
• Strong Python and SQL knowledge with the ability to review implementation and architecture decisions.
• Understanding of statistics, anomaly detection, forecasting, and data-driven system evaluation.
• Experience identifying technical risks, architectural weaknesses, and performance bottlenecks.
• Ability to translate complex technical findings into clear, practical recommendations for an engineering team.
• Strong communication and mentoring skills.
• English sufficient for technical discussions, documentation, and regular communication with the team.
   

Nice to Have

• Previous experience as a Lead ML Engineer, ML Architect, AI Architect, Staff/Principal ML Engineer, or ML Consultant.
• Experience with LangChain, LangGraph, or other Agent frameworks.
• Experience with AWS Bedrock, Claude, or other managed LLM platforms.
• Experience with FinOps, cloud billing, or cloud cost optimization.
• Knowledge of:
  • AWS CUR
  • AWS Cost Explorer
• Experience with Langfuse, LangSmith, RAGAS, or similar AI observability and evaluation platforms.
• Experience designing evaluation pipelines and golden datasets for LLM applications.
• Experience with forecasting and time-series analysis.
• Experience processing large financial or billing datasets.
• Understanding of multi-tenant architectures and secure AI tool execution.
• Experience optimizing LLM latency, token usage, and operational costs.
   

Technology Stack

• Python 3.12
• FastAPI
• LangChain
• LangGraph
• AWS Bedrock
• PostgreSQL
• SQL
• Langfuse
• RAGAS
• Docker
• Next.js / TypeScript
   

Engagement Format

• Part-time consulting engagement
• Flexible involvement based on project and team needs
• Regular technical reviews and consultations with the AI/ML team
• Architecture and solution reviews for key AI/ML initiatives
• Focus on technical guidance, quality assurance, process improvement, and mentoring rather than day-to-day feature implementation
   

Why Join Us?

• Influence the technical direction of a real production AI product without committing to a full-time role.
• Work on challenging problems at the intersection of Generative AI, Agentic AI, Cloud, and FinOps.
• Help shape the architecture and engineering practices behind production-grade AI systems.
• Work with a team that values measurable AI quality, reliability, security, and business impact.
• Apply your senior-level expertise where it has the highest impact: technical decisions, architecture, evaluation, optimization, and team development.
• Stay close to modern AI technologies while working in a flexible consulting format.

Dash Financial Technologies is a leading trading technology provider to the institutional trading community. With a suite of highly customizable tools, Dash designs and delivers intelligent, high performance solutions in four product categories: Trading Technologies, Execution Services, Analytics and Regulatory Technologies. With a relentless focus on transparency, performance and customization, Dash Financial Technologies caters to institutions that require increasingly specialized, complex and adaptable tools to exceed their goals surrounding best execution

We are looking for a skilled Business Analyst, ideally with experience in Capital Markets domain, as a ramp-up of our BA capacity on a modern order management system project. 

 

Requirements
o You have a technical background
o You have a passion for great, structured documentation and the benefits of knowledge management.
o You communicate clearly and precisely, leading others and transferring knowledge efficiently.
o You form strong, honest, and mutually respectful relationships with the key stakeholders

Desirable
o You have experience working with asset classes such as US Equities and Equity/Index Options.
o You have a good understanding of order management specifics particularly in the trading systems
o You are familiar with the FIX Protocol

Responsibilities
o Play the role of Business/System Analyst
o Work closely with the client to ensure requirements are captured, the scope is controlled, and expectations are met
o Work closely with the development team to do the entire system design
o Participate and facilitate workshops, stakeholder interviews, UX design sessions, solution planning & review meeting, etc.
o Specification of new functionality across the frontend and backend components
o Ongoing improvement of knowledge through better documentation and knowledge management infrastructure
o Play a proactive role in proposing new processes, tools & approaches
o Assist in project planning, quality control, and user acceptance testing
o Help investigate complex functional software issues, assist in root cause analysis, and establish a solution
o Identify and manage risks and flag major issues early

We are offering You 

• Remote work   
• Flexible working hours 
• All necessary equipment (laptop,monitors. etc.) 

Overview

We are looking for a detail-oriented and motivated  Quality Assurance Specialist to join our team. This is a great opportunity for someone who has completed a QA Academy, QA training program, or similar practical course and is ready to start their professional career.

No prior commercial experience is required, but candidates should have a basic understanding of QA processes, testing web applications, writing test cases, and documenting requirements.

This role is ideal for someone who can learn quickly, communicate clearly, organize information, and help ensure high-quality delivery of web applications.

Key Responsibilities

• Gather, analyze, and document business and functional requirements
• Collaborate with stakeholders, developers, and team members 
• Create and maintain test cases and test scenarios based on requirements
• Perform functional, regression, and exploratory testing of web applications
• Identify, document, and track defects through resolution
• Maintain clear and consistent documentation across all deliverables
• Learn and follow team processes, tools, and quality standards

Requirements

• Completed QA Academy, QA bootcamp, QA training program, or equivalent hands-on QA course
• Basic understanding of software testing concepts and QA processes
• Ability to write test cases, test scenarios, and bug reports
• Basic understanding of web applications and how users interact with them
• Strong attention to detail and ability to organize information clearly
• Analytical thinking and problem-solving mindset
• Good written and verbal communication skills
• Willingness to learn, ask questions, and improve through feedback
• Familiarity with tools such as Jira, Trello, Excel, Google Sheets, or similar tools

Nice to Have

• Practice testing web applications during QA Academy or training projects
• Experience creating documentation, user stories, or acceptance criteria
• Basic understanding of Agile/Scrum processes
• Exposure to HR, recruiting, or business operations systems
• Basic understanding of APIs, databases, or backend systems
• Portfolio, training project, or sample test documentation

Experience Level

This is an entry-level role. We welcome candidates with no prior commercial experience, provided they have completed QA Academy or similar QA training and can demonstrate basic hands-on skills in software testing, documentation, and analytical thinking.

Candidates with internship, freelance, training project, or personal project experience are also encouraged to apply.

Job Title:

Block-Builder Engineer

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.

About the Product:

An advanced block construction platform operating on the Ethereum mainnet that processes order flow, transaction bundles, and submits finalized blocks through relay networks in real time. It addresses neutral and efficient block building to unlock new decentralized finance capabilities, including intrablock lending and execution extensions. The system handles high-throughput data pipelines and strict latency requirements, backed by comprehensive observability and analytics to drive iterative improvements based on live production metrics. Strong engineers are essential to maintain system health under real-time load, verify data-driven hypotheses, and innovate on core protocol logic.

About the Role:

The Block-Builder Engineer will join an experienced team in Kraków or Warsaw to develop and maintain a next-generation Ethereum block construction system. You will own pipeline components that ingest order flow and transaction bundles, manage relay submission paths, and ensure stable performance under real-time load. Your work will include building and refining observability platforms, conducting controlled A/B experiments, and driving reliability improvements such as panic mitigation and latency regression detection. As you ramp, you will contribute to optimization-driven block building logic, on-chain intrablock lending protocols, and an execution extension, gaining autonomy and deep technical ownership across the core stack.

Key Responsibilities:

- Integrate and process order-flow ingestion, bundle and transaction handling, back-pressure management, and reintegration of data for block inputs.

- Develop and maintain relay submission paths to ensure end-to-end block delivery under production load.

- Build and enhance telemetry and dashboards using Grafana, Prometheus, Loki and SQL to provide trusted observability.

- Diagnose and correct measurement issues—broken counters, misleading dashboards, and erroneous denominators—to maintain metric accuracy.

- Design, execute and analyze controlled A/B experiments in production, reporting findings objectively, including inconclusive results.

- Identify and resolve system panics, dropped messages, and latency regressions, with automated tests to prevent recurrence.

- Optimize data pipelines and processing systems for high-throughput, low-latency performance.

- Contribute to the development of intrablock lending protocols and associated trusted-execution components.

- Collaborate on an execution extension (BEX) and future protocol and exchange-layer enhancements.

Required Competence and Skills:

- 2–4 years of professional software engineering experience shipping and operating production systems.

- Minimum 2 years working on Ethereum or other EVM-compatible blockchains.

- Proficiency in Rust or strong systems experience in Go, C++ or Java with eagerness to adopt Rust.

- Solid understanding of concurrent and real-time code within large, existing codebases.

- Strong SQL skills and practical experience with Python for data analysis and tooling.

- Familiarity with monitoring and analytics tooling and a drive to ensure metric correctness.

- Rigorous engineering habits, including comprehensive testing and clear distinction between verified and assumed behavior.

- Data-driven mindset with a habit of querying logs and databases to validate change impact.

Nice to Have:

- Exposure to Ethereum block-building protocols (PBS/MEV), smart contract interactions, or trading systems.

- Experience with high-throughput data pipelines, time-series databases, or large-scale analytics.

- Familiarity with Ethereum client internals (reth, geth, revm) or deploying services on Kubernetes and Docker.

Why Us:

We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

We offer a highly competitive package with yearly performance and compensation reviews.

About the Product & Team

Our client is an innovative, fast-growing tech startup developing a next-generation AI agent for autonomous browser and web workflow automation. The platform leverages modern LLMs to dynamically inspect web interfaces, generate resilient Playwright automation scripts, and execute complex, repetitive browser tasks for businesses across the US.

• This is a new area within the scope of software engineering, but we believe the current positions will be suitable for Automation QA professionals. 

You will be joining a lean, engineering-driven team where your work directly shapes the core AI product, solves real-world customer automation challenges, and drives the adoption of agentic AI systems.

Role Overview

We are seeking a proactive Forward Deployed Engineer to help international clients integrate, optimize, and scale this AI-driven browser automation agent. In this role, you will sit at the intersection of customer-facing technical integrations, prompt engineering, and script troubleshooting.

You will collaborate closely with the CTO to onboard new users, monitor agent execution, refine daily system prompts, and fine-tune generated automation scripts to ensure maximum reliability for end-user workflows.

Key Responsibilities

• Client Onboarding & Integrations: Guide clients through workflow setups, analyze their business processes, and troubleshoot integration bottlenecks (transitioning from async ticket analysis to leading live customer calls).
• AI Agent Optimization & Prompting: Daily monitoring of agent performance, identifying edge cases, and engineering/adjusting prompts to improve output accuracy.
• Script & Locator Troubleshooting: Review, debug, and manually adjust agent-generated Playwright automation scripts when complex dynamic web elements or DOM changes occur.
• Codebase Maintenance: Contribute to maintaining JavaScript-based core modules and supporting integration tools (~20–30% of total workload).
• Feedback Loop: Act as the technical bridge between customer workflows and product development to drive platform improvements.

Requirements

• Communication: C1 / Fluent English with confident verbal presentation skills and comfort leading live video calls with US/EU clients.
• AI & LLM Proficiency: Strong hands-on experience with LLMs, practical prompt engineering, and AI tools for debugging and automating workflows.
• Web Fundamentals: Solid understanding of the DOM tree, dynamic web elements, XPath, and CSS selectors.
• Technical Skills: Practical ability to read, understand, and debug JavaScript / TypeScript code.
• Time Flexibility: Ability to comfortably handle team and client calls during late afternoon/evening hours (up to 20:00–21:00 Kyiv time).

Nice to Have

• Hands-on experience with browser automation frameworks (Playwright).
• Background in QA Automation, Solutions Engineering, Technical Support (Tier 3), or Technical Customer Success.
• Familiarity with LLM function calling, structured outputs, or agentic workflows.

We OFFER:

• ​A fast-paced, highly professional, international team environment with a flat structure and rapid decision-making.
• ​Competitive compensation packages commensurate with your background and product portfolio.
• ​Flexible, remote-first workflow optimized for seamless global alignment.
• Medical Insurance in Ukraine and a Multisport program in Poland.
• Offices in Ukraine (Kyiv, Kharkiv) and Poland (Wroclaw) or Remote.
• Paid vacation, sick leave, and official holidays.
• Legal & Accounting services.
• The company provides all necessary equipment.
• English classes and Education reimbursement.

🚀 Join Our Team as a Manual QA Engineer!
We are looking for a proactive and detail-oriented Manual QA Engineer to join our team and help ensure the quality of our web and mobile products. This role requires a high level of ownership, independence, and strong communication skills, as you will be the primary QA specialist on the project, working closely with developers and the Product Owner.

REQUIREMENTS:

• 1+ year of commercial experience in manual software testing.
• Upper-Intermediate English with the ability to communicate confidently and understand native speakers – MUST.
• Strong STLC knowledge, test design techniques, and experience with various testing types (functional, regression, exploratory, integration)
• Experience testing web and iOS applications.
• Experience with cross-browser and cross-platform testing.
• Understanding of release and upgrade testing processes.
• Strong knowledge of Chrome DevTools (Console, Network, Storage, Service Workers).
• Experience with TestFlight and basic familiarity with Xcode.
• Experience testing browser extensions - nice to have.
• Basic knowledge of MySQL.
• Ability to create clear test documentation (test cases, checklists, bug reports).
• Experience with Jira, Qase, or similar QA tools.
• Strong analytical, problem-solving, and communication skills.
• Ability to work independently, clarify requirements, and identify risks proactively.

RESPONSIBILITIES:
 

• Own the QA process for the project and act as the primary quality advocate within the team.
• Analyze requirements and proactively identify ambiguities, risks, and edge cases.
• Collaborate closely with developers and the Product Owner, participate actively in team meetings, planning session to ensure high product quality.
• Create, maintain, and execute test cases, checklists, and test plans.
• Perform functional, regression, exploratory, and integration testing.
• Test web applications, browser extensions, and iOS mobile applications.
• Validate new features, release candidates, and upgrade flows.
• Investigate issues using Chrome DevTools, Service Worker tools, Xcode, and other debugging utilities.
• Continuously improve QA processes and contribute to product quality initiatives.
   

WHAT WE OFFER:

• Full-time remote position with stability and career growth opportunities.
• Ukrainian holidays off, plus paid vacation and sick leave.
• Compensation for English courses and sports activities.
• Access to an in-house English-speaking club.
• Accounting support and a proactive work environment.
• Engaging corporate events and team-building activities.
   

How to Apply:
If you enjoy taking ownership, working closely with product and engineering teams, and making independent decisions that directly impact product quality, we'd love to hear from you. Please submit your resume and tell us why you'd be a great fit for this role.



 

We're looking for an experienced Chief Billing Officer to lead our PSP strategy.

Responsibilities

- Lead and develop the Billing/Payments function across the business group.

- Define and execute the PSP strategy across multiple markets, including provider selection, onboarding, payment method development, and integration roadmap execution.

- Build KPI, reporting, and monitoring frameworks covering PSP performance, payment conversion, availability, liquidity, and operational efficiency.

- Optimize payment flows by improving conversion, UX, payment stability, and reducing user-facing issues.

- Partner with engineering teams to define business requirements, prioritize initiatives, and ensure high-quality delivery.

- Manage relationships with PSPs and oversee payment operations, risk management, and service performance.

- Lead the Billing department (PSP, Monitoring, Business Analysis, Liquidity, Key Account), driving team performance, process improvements, and automation.

- Audit existing payment processes, identify bottlenecks, and implement scalable operational improvements.

Requirements

- Proven experience in Billing, Payments, or PSP within the iGaming industry.

- Strong understanding of payment infrastructure, including PSPs, payment methods, integrations, conversion optimization, monitoring, payment errors, balances, liquidity management, and payment method stability.

- Experience working with complex markets, preferably CIS and/or emerging markets, where rapid adaptation and continuous payment solution development are required.

- Experience leading teams and building operational processes, including KPIs, reporting, SLAs, prioritization, and performance management.

- Ability to work effectively with engineering teams by defining business requirements, managing backlogs, and overseeing implementation quality and timelines.

- Strong analytical skills with a data-driven approach to decision-making.

- Highly organized and structured, with the ability to deliver quality results in a fast-paced environment while maintaining a high level of ownership and professionalism.

- English proficiency at B2 level or higher.
 

Our benefits to you:

☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance, and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location

About:
This role sits at the intersection of advanced AI development and rigorous quality assurance
within a leading technology organization focused on delivering secure, reliable solutions for
mission-critical sectors. The Senior QA Automation Engineer will play a key part in ensuring that
innovative AI and supply chain systems meet the highest standards of reliability and
compliance, supporting the organization’s commitment to operational excellence and
technological advancement.
 

Responsibilities:
- Lead the design and implementation of automated testing frameworks for AI and LLM-based
systems
- Develop and maintain automated test suites to validate AI outputs for accuracy, consistency,
and alignment with ground truth datasets
- Build and execute integration tests to ensure seamless data flow between AI agents and
enterprise systems such as ERP platforms
- Create and run performance tests to benchmark AI model latency, throughput, and reliability in
real-time environments
- Automate API testing to verify secure data exchange, RBAC enforcement, and PII redaction
before data reaches AI models
- Map automated test cases to system requirements and user needs to support formal
verification and validation processes

- Prepare and deliver test readiness documentation and evidence for stage gate and production
release reviews
- Manage defect identification, tracking, and resolution, ensuring traceability to specific model
versions or datasets
- Collaborate with cross-functional teams, including data scientists and systems engineers, to
align testing with acceptance criteria
 

Skills:
- Expert proficiency in Python for test automation
- Strong experience with Pytest, Selenium, and Playwright
- Advanced skills in performance testing tools (Locust, JMeter, K6)
- Hands-on experience evaluating LLMs and AI models (DeepEval, TruLens, custom evaluators)
- Proficiency in SQL and data validation tools (Great Expectations)
- Experience integrating automated tests into CI/CD pipelines (GitLab)
- Familiarity with requirements management and traceability tools (Jira, Jama, Polarion)
- Strong knowledge of test management and reporting tools (TestRail, Allure)
- Solid understanding of version control systems (Git, GitLab)
- Deep knowledge of modern quality engineering practices (Shift Left, Test Pyramid, mono-repo
architecture)

This role sits within a fast-growing technology company developing advanced AI agents for the
construction industry, focused on automating the analysis of building models, drawings, and
regulatory documents to enhance compliance, planning, and design validation. As part of a
senior engineering team, this position plays a critical role in ensuring the reliability and
trustworthiness of complex, non-deterministic AI systems that support key decision-making
processes in construction projects.
 

Responsibilities:
• Design and execute comprehensive tests for agentic AI systems, focusing on tool selection,
multi-step reasoning, and recovery from failures
• Evaluate agent outputs for grounding, citation accuracy, and evidence-backed claims
• Develop and maintain automated frameworks to assess generative AI outputs for hallucination,
consistency, and factual accuracy
• Build and run guardrail and adversarial tests to identify vulnerabilities such as prompt injection
and instruction manipulation
• Validate multi-turn conversations and ensure correct handling of conversational state across
sessions
• Implement and monitor continuous evaluation of agent performance in production
environments
• Investigate and triage quality incidents, tracing failures to specific models or datasets and
collaborating on fixes

• Create and maintain robust integration and API tests to ensure seamless backend and
user-facing workflows
• Enforce quality gates and produce verification evidence to support confident releases
• Map test cases to system requirements, ensuring traceability and comprehensive coverage
 

Skills:
- Expert Python programming for test automation and custom evaluation tooling
- Hands-on experience with LLM/agent evaluation frameworks (e.g., DeepEval, TruLens,
RAGAS, or custom evaluators)
- Proficiency in designing and implementing non-deterministic and generative AI test strategies
- Strong knowledge of integration, API, and UI automation tools (e.g., Selenium, Playwright,
Requests)
- Experience with performance and load testing tools (e.g., Locust, JMeter, k6)
- Proficiency with SQL and data validation tools (e.g., Great Expectations)
- Familiarity with vector databases and retrieval corpora
- Experience integrating automated tests into CI/CD pipelines (e.g., GitLab)
- Ability to define and communicate pass/fail criteria for probabilistic systems
- Strong collaboration and communication skills with engineering and product teams

What You'll Do

• Administer, maintain, and troubleshoot Linux servers.
• Configure, upgrade, and optimize server infrastructure.
• Monitor server performance, availability, and overall health.
• Administer and maintain Nginx and/or Apache web servers.
• Configure backup solutions and participate in disaster recovery planning and implementation.
• Automate routine administrative tasks using Bash and other automation tools.

Moodle LMS Administration

• Install, configure, upgrade, and maintain Moodle LMS.
• Manage plugins, themes, and integrations.
• Monitor performance and troubleshoot application issues.

AWS Infrastructure

Work with:

• Amazon EC2
• Amazon Aurora Serverless
• Amazon RDS Proxy
• Amazon CloudWatch
• IAM, Security Groups, and AWS Secrets Manager

Database Administration

• Administer and maintain MySQL databases.

Cloudflare Administration

Configure and maintain:

• DNS
• CDN
• SSL/TLS
• Web Application Firewall (WAF)
• DDoS Protection
• Zero Trust

WordPress Administration

• Install, maintain, secure, and optimize WordPress websites.

Linux Security

• Perform Linux server hardening.
• Configure and maintain SSH security.
• Configure and manage Fail2Ban.
• Manage firewall rules.
• Ensure timely security patching and system updates.

Documentation

• Create and maintain technical documentation, infrastructure diagrams, and operational documentation.

Requirements

• 5+ years of Linux system administration experience.
• Experience administering enterprise Linux environments.
• Hands-on experience administering Moodle LMS.
• Experience working with AWS.
• Experience administering MySQL databases.
• Experience configuring and managing Cloudflare.
• Experience administering WordPress websites.
• Experience with Nginx and/or Apache.
• Experience managing SSL certificates and DNS.
• Strong knowledge of Linux security and server hardening.
• Experience writing Bash scripts.
• Strong troubleshooting and problem-solving skills.
• English level Upper-Intermediate (B2) or higher (both written and spoken).

Nice to Have

• Bachelor's degree in Computer Science, Information Technology, or equivalent professional experience.
• Experience writing and maintaining technical documentation.
• Experience supporting high-availability or high-load production environments.

What We Offer

• Fully remote position.
• Salary: USD 2,500–3,700 DOE (Depending on Experience).
• Opportunity to work on a long-term product.
• The opportunity to help shape and improve our infrastructure while implementing new technologies.
• Small, collaborative team with a high level of ownership and autonomy.
• Working hours aligned with Pacific Time (US).
• Participation in an on-call rotation.

Important

This role requires working during US Pacific Time (PT) business hours and participating in an on-call rotation.

When applying, please include a short cover letter in English confirming:

• Your willingness to work during US Pacific Time hours.
• Your willingness to participate in the on-call rotation.
• Your English proficiency level.
• Your ability to communicate confidently in English, both verbally and in writing.

Please note: This position requires English proficiency at Upper-Intermediate (B2) level or higher, as you will regularly communicate with English-speaking colleagues, participate in meetings, and prepare technical documentation.

Who We Are

PAR Retail, with its Open Commerce® product suite and patent pending Wallet Steering® System, empowers Convenience & Fuel Retailers to gain more share of wallet and customer lifetime value than possible with any other solution provider. PAR Retail’s unified Open Commerce product suite consists of: Activate for Intelligent 1:1 Loyalty, Transact for Contactless Commerce, and Experience for Cross-Channel Customer Experiences. PAR Retail’s solutions are supported by a set of subscription-based program management services and are contractually backed by its 1.5X Performance Guarantee.

Technology Stack:

Ruby, Ruby on Rails, Postgres, Redis, Sidekiq, GraphQl, RabbitMQ

Requirements:

- Practical experience building systems in Ruby on Rails

- At least 6 years industry experience or equivalent

- Experience building and maintaining backend APIs, including design, implementation, evolution, and maintenance

- Familiarity with TypeScript, or similar modern strongly-typed language

- Proficiency using a variety of database technologies, both relational and non-relational

- Strong understanding and familiarity with CI/CD pipelines and automated tests

- An ability to work in service-based architectures as well as well-factored Rails monolith applications

- Highly independent and able to effectively self-organize and prioritize work

- The ability to write clean code, and the discipline to write effective automated tests to deliver high-quality system improvements

- An ability to effectively break down larger bodies of work for delivery as a series of small, self-contained changes to the system

- Excellent spoken and written communication skills

- BS/MS degree in Computer Science, Engineering, or equivalent years of professional working experience

Bonus Points

- Experience with NodeJS and React

- Experience in the retail and/or fuel & convenience industries

- Experience working in distributed teams

- Experience with Nest.js and/or GraphQL

Responsibilities:

- Collaborate closely with other Engineers, design and implement new functionality based on product objectives and requirements.

- Work with the broader product engineering team to plan and coordinate feature and functionality improvements, as well as resolve bugs and execute technical enhancements, that cross-cut large parts of our platform.

- Work to continually learn, improve technology skills, expand knowledge of the our platform technologies, and gain increasing versatility across the breadth of our platform systems.

- Expand APIs and business logic, and as needed write or revise customer-facing API documentation.

- Work with our infrastructure team to enable and enhance highly-available, performant, and well-instrumented backend applications and services that run in our customer environments at substantial scale.

- Support operations and infrastructure teams for issue resolution on relevant applications or services running in production environments.

PAR Retail Offers:

- Long-term employment;

- Competitive compensation with regular performance-based salary and career development reviews;

- Paid vacations and sick leaves;

- Flexible working hours;

- A unique and friendly environment where everyone can explore and learn new technologies.

Codefinity is a fast-growing EdTech company on a mission to make tech education accessible, engaging and truly practical. We help people from all over the world master in-demand programming skills and build meaningful careers in tech.

Our platform has already empowered hundreds of thousands of learners globally — from complete beginners to industry professionals — through interactive, hands-on courses designed to accelerate real skill growth.

This isn’t a position where you support creatives and write briefs for designers.

This is an opportunity to become one of the first key people in the project and build the Creative Marketing function practically from scratch — from finding new creative angles and building testing processes to forming your own team. As the company grows, you’ll have the opportunity to grow into Creative Marketing Lead.

If you’re interested not just in creating creatives, but in building a system that determines the growth rate of the entire business — this role is for you.

Your responsibilities:

• Building creative strategy for scaling Meta and other advertising channels.
• Generating, testing, and scaling new creative angles, concepts, storylines, and advertising approaches.
• Building a continuous creative testing system: from insight analysis to the production pipeline.
• Managing the full creative production cycle: setting tasks for graphic and motion designers.
• Analyzing creative performance together with the UA team and making data-driven decisions.
• Ongoing analysis of competitors, ad libraries, trends, and best practices in mobile subscription products.
• Working with the product team to find new advertising hooks and improve conversion.

• Building and developing your own Creative Marketing team.

   

Who we’re looking for:

• 2–5+ years of experience in Creative Marketing, Creative Strategy, or User Acquisition.
• Experience creating and scaling advertising creatives for Meta.
• Deep understanding of why advertising creatives work or don’t work.
• Experience building hypothesis testing processes and fast iteration.
• Ability to work with creative analytics and make data-driven decisions.
• Strong sense of marketing, storytelling, and user psychology.

• Entrepreneurial mindset and a desire to build a function, not just execute tasks.

   

Nice to have:

• Experience working in subscription products.
• Understanding of how different product monetization models work and how content affects engagement and retention.

• Experience working with AI tools for photo/video generation and creative production automation.

   

Benefits

• Work on a high-impact EdTech product within an ambitious global team
• 20 working days of paid vacation per year, plus public holidays.
• An office with a reliable shelter, generators, satellite internet, and other amenities.
• Access to our corporate knowledge base and professional communities.
• Compensation for English language learning, external training, and courses.
• Medical insurance and full sick leave compensation.
• In-office medical support and professional massage services
• Sports activities: running, yoga, boxing, and more.

Overview 

Come join us as we scale our retail and commerce loyalty platform! PAR Retail is looking for a Senior NodeJS engineer on its expanding product engineering team as we build and grow our Open Commerce enterprise software-as-a-service platform. 

Open Commerce is a technology suite that enables marketing professionals in the fuel & convenience industry to create real-time, hyper-personalized offers and customer interactions across a variety of channels (mobile, web, SMS, and in-person) to drive customer behavior toward a desired goal. 

Our technology bridges financial payment providers, retail fuel pump technology, and customer experience by wrapping low-level standards-compliant integrations with powerful software abstractions on an ultra-modern software platform. Our platform services and applications are built using a broad swath of technologies (Typescript, NodeJS, Ruby, React, and others), interconnected via GraphQL and RabbitMQ, and run in AWS using Terraform, Helm and Kubernetes (via EKS). 

PAR Retail has its headquarters in Philadelphia, Pennsylvania (USA) and leverages a diverse distributed product engineering and operations team across the United States and Ukraine. PAR Retail offers highly competitive compensation and benefits, as well as an engineering-friendly and product-centric culture. On PAR Retail’s Open Commerce team, we embrace a deeply collaborative software product development process where engineering, design, and product collaborate to shape and ship new functionality. 

Successful candidates will enjoy PAR Retail’s friendly and flexible culture, and embrace our relentless drive to excellence and goal of providing the #1 retail marketing platform in the fuel & convenience industry and beyond. 

Responsibilities 

• Working with the team, design and implement new functionality based on product objectives and requirements. 
• Work with the broader product engineering team to plan and coordinate feature and functionality improvements, as well as resolve bugs and execute technical enhancements, that cross-cut large parts of our platform. 
• Work to continually learn, improve technology skills, expand knowledge of the Open Commerce platform technologies, and gain increasing versatility across the breadth of our platform systems. 
• Expand APIs and business logic, and as needed write or revise customer-facing API documentation. 
• Work with our infrastructure team to enable and enhance highly-available, performant, and well-instrumented backend applications and services that run in our customer environments at substantial scale. 

• Support operations and infrastructure teams for issue resolution on relevant Open Commerce applications or services running in production environments. 

   

Qualifications 

• Practical experience building systems in Node.js 
• At least 5 years industry experience or equivalent 
• Experience building and maintaining backend APIs, including design, implementation, evolution, and maintenance 
• Familiarity with TypeScript, or similar modern strongly-typed language 
• Proficiency using both relational and non-relational database technologies 
• Strong understanding and familiarity with CI/CD pipelines and automated testing 
• Basic knowledge Docker and Kubernetes 
• Familiarity with OAuth and JWT 
• Some experience with front-end JS technologies, esp. React or Angular 
• An ability to work in service-based architectures 
• Highly independent and able to effectively self-organize and prioritize work 
• The ability to write clean code, and the discipline to write effective automated unit tests in order to deliver high-quality system improvements 
• An ability to effectively break down larger bodies of work for delivery as a series of small, self-contained changes to the system 
• Excellent spoken and written communication skills 

• BS/MS degree in Computer Science, Engineering, or equivalent years of professional working experience 

   

Bonus Points 

• Experience with Nest.js and/or GraphQL 
• Experience with Ruby on Rails 
• Experience with AWS 
• Experience working in distributed teams 

• Experience in the retail and/or fuel & convenience industries 

   

PAR Retail Offers:

- Long-term employment;

- Competitive compensation with regular performance-based salary and career development reviews;

- Paid vacations and sick leaves;

- Flexible working hours;

- A unique and friendly environment where everyone can explore and learn new technologies.