Jobs at Djinni

About The Role

We are looking for Middle and Senior Product Analysts to join our growing analytics team (30+ professionals). In this role, you will drive tangible business impact by delivering high-quality insights and recommendations, leveraging your ability to combine strategic thinking and problem-solving with detailed analysis. You will collaborate closely with Product Managers and cross-functional teams, uncovering business insights, devising optimization strategies, and validating them through experiments.

What You’ll Do

• Conduct deep-dive analyses and deliver actionable insights to improve product performance.
• Analyze large-scale datasets (funnel events, transactional, and text data) to identify growth opportunities.
• Design and interpret A/B tests, MAB experiments, and hypothesis-driven analyses.
• Track and implement key business metrics to support decision-making.
• Work with cutting-edge tools, including Bayesian statistics, ML models, and LLMs.

• Collaborate with a large and highly skilled Analytics team, fostering a knowledge-sharing environment.

   

What We’re Looking For

• 5+ years of experience in product analytics, preferably in e-commerce or customer experience products.
• Proficiency in SQL, with the ability to write complex queries to extract insights and support decision-making.
• Strong proficiency in Excel for analysis and business modeling.
• Experience with Power BI (Tableau experience is also considered).
• Expertise in Descriptive and Inferential Statistical Analysis, A/B testing, and Hypothesis Testing, with a proven ability to analyze results.
• Familiarity with Google Analytics, BigQuery, Python/R, and ML is desirable.
• Excellent communication skills, with confidence in interacting across all levels of management and diverse business functions.

• English proficiency (at least strong upper-intermediate level).

   

Why Join Us?

• High-Impact Data — Work with vast datasets generated by over a million daily visits, uncovering valuable insights.
• Collaborative Analytics Team — Join a team of 30+ skilled analysts who actively share knowledge and support each other.
• Cutting-Edge Tools & Techniques — Get hands-on experience with ML, Bayesian methods, and LLMs to solve real business challenges.

• Data-Driven Culture — Thrive in an environment where data informs every decision and drives continuous improvement.

   

Perks and Benefits

• Time off throughout the year (paid and unpaid)
• Professional development support and encouragement
• Resources to help improve your overall well-being
• Free JustAnswer membership

Trinity Partners is an international iGaming affiliate network working with top-tier advertisers and offering affiliates exclusive offers, strong brands, high approval rates, and stable payouts.
Our team actively participates in international conferences worldwide, follows a dynamic work approach, and provides strong opportunities for professional growth.

We are looking for an Affiliate Manager who can build long-term partnerships, work with performance metrics, and contribute to scaling traffic and results.

Responsibilities

• Attract new affiliate partners and develop long-term relationships with existing ones
• Monitor traffic quality, scale campaigns, and detect/prevent fraud
• Analyze key performance metrics (KPI, EPC, ROI, LTV) and prepare insights and recommendations
• Collaborate effectively with the team and coordinate with internal stakeholders
• Monitor market trends and optimize traffic flows
• Participate in international industry conferences

Requirements

• 1+ year of experience in the iGaming vertical
• Strong communication and negotiation skills
• Ability to work independently and within a team
• English level Intermediate or higher
• Proactive, result-oriented mindset with a growth-driven attitude

Nice to Have

• Existing affiliate partner base
• Experience working with Scaleo or other tracking platforms
• Experience in developing affiliate marketing strategies

We Offer

• Work with exclusive offers and reliable advertisers
• Stable payouts and high approval rates
• Opportunity to attend international conferences
• Dynamic work environment and professional growth opportunities
• Support from an experienced and collaborative team

About the Project

We’re building a cutting-edge AI-powered video platform that aggregates and processes content from multiple social media sources. Users can interact with video data through context-aware search, Retrieval-Augmented Generation (RAG), and LLM agent orchestration.

You’ll join a small, focused team working closely with the CTO/founder, shaping the product’s technical foundation and bringing innovative AI-driven experiences to life.

Tech Stack

Backend: Python (FastAPI), Node.js / TypeScript
Frontend: React, Next.js, Tailwind CSS
Cloud: AWS Lambda, API Gateway, Cognito, S3, DynamoDB, OpenSearch
Architecture: Serverless, event-driven design
AI Integration: RAG, LLM agents, contextual search

Responsibilities

Develop and maintain backend services in Python (FastAPI or similar)
Create and deploy serverless APIs on AWS (Lambda, API Gateway)
Implement secure user authentication (AWS Cognito) and cloud storage (S3)
Integrate AI-powered features (RAG, LLM agents, contextual search)
Parse and process video content and metadata from social media
Implement video display, search, and interaction components
Contribute to infrastructure, CI/CD, and performance optimization

What We’re Looking For

4+ years of professional software development experience
Strong skills in Python (FastAPI preferred)
Proficiency with AWS services (Lambda, Cognito, S3, API Gateway, DynamoDB)
Ability to design and scale RESTful APIs
Understanding of serverless and event-driven architectures
Experience integrating with or building AI/ML-powered features (RAG, LLMs, etc.)
Good communication skills and a proactive, startup-ready mindset

Nice to Have

Experience with React, Next.js, and TypeScript

Experience with video parsing, streaming, or playback
Familiarity with infrastructure-as-code or DevOps (CI/CD pipelines)
Exposure to authentication and analytics systems (AWS Cognito, OpenSearch)
Understanding of SEO, SSR/SSG rendering models in Next.js

Being a part of 3asoft means having

High level of flexibility and freedom
p2p relationship with worldwide customers
Competitive compensation paid in USD
Fully remote working

We’re Umber - a small hands-ond development team working with fintech systems and complex business platforms. We’re opening aremote Manual QA Engineer role to join our team and support two web products that are currently in active development.

About the role and projects

You’ll work across two web products for a long-term client, both currently in active development. 

One of them is a web platform for crypto traders, focused on trading logic, competitions, and internal product flows. The second one is a business platform at the intersection of ATS, HRM, and job boards, built to manage people, roles, workflows, and payouts at scale.

Until now, quality has mostly been covered by engineers. We’re now looking for a dedicated QA to bring more consistency into the process: clearer test coverage, structured checklists, and predictable regression before releases. 

The role focuses on day-to-day quality assurance: testing new features and business logic, exploring edge cases, and maintaining lightweight QA documentation.

How You’ll Contribute

• Validate core flows and calculations (amounts, balances, reporting consistency)
• Design and maintain clear test cases, checklists, and regression coverage
• Run smoke and regression checks before releases
• Log and track issues in ClickUp, following them through to resolution
• Work closely with PM and engineers to clarify requirements and keep QA documentation up to date

What We’re Looking For

• 2–3 years of experience in manual QA for web products
• Experience working with complex business logic (fintech, trading, internal platforms, etc.)
• Ability to structure QA work: test cases, checklists, and basic documentation
• Strong attention to detail and a responsible, reliable approach to work
• English level sufficient for documentation and day-to-day team communication

Nice to have: basic API testing experience (Postman / Swagger)
 

This role is focused on manual testing and quality ownership. Due to the projects’ current stage and fast iteration cycles, test automation is not part of the scope, and we’re not planning a transition into automation in the near future.

Tech & Tools

You’ll work around a modern web stack and typical delivery tooling: Node.js, NestJS, TypeScript, PostgreSQL, TypeORM, microservices, Docker, AWS, CI/CD pipelines, provider APIs. (Devs use Jest for unit tests.)

Hiring Process

• Intro call (30–40 min) with Talent Partner
• Technical interview (60–90 min) with the CTO: a mix of experience-based discussion + a short practical QA task (e.g. exploratory testing on a demo environment, or test-case / checklist design)

Terms & Benefits

• Full-time, contract-based cooperation (FOP)
• 3-month probation period
• 24 paid days off per year, plus company days off for New Year and Christmas
• Fully remote work, no time trackers
• Annual performance review
• Occasional company gifts on holidays or special occasions

Your next challenge is waiting. Let’s connect, talk about the impact we can make, and see if we’re the right fit for each other!

Required skills

• 5+ years of proven experience in Software development
• Strong knowledge of the Laravel framework
• Deep understanding of SOLID principles, design patterns, and PSR standards
• Experience with SQL (PostgreSQL), query optimization, joins, aggregations
• A clear understanding of TDD, BDD
• Experience with *nix
• Understanding Git versions control system
• A clear understanding of how to write DRY, KISS and optimized for high-load code
• Experience working with the Docker environment, container registry
• Event-driven architecture practical usage
• Experience with Unit tests

• Development workflow knowledge (SDLC)

   

As a plus

• Experience with queues/messaging (Centrifugo) 

   

Must have personal qualities like

• Ability to work in a team
• Good analytical skills and attention to details

• Ability to understand someone else’s code

   

Opportunities

• Build a successful product that grows dynamically within the US market
• Professional and career growth
• Possibility to propose solutions to a project

• Realization of your innovative ideas in building new solutions and services

   

We offer

• Dynamic and challenging technical tasks
• Long-term employment
• Compensation for certifications, conferences, training, and other working events
• Work in a unique professional, friendly and supportive environment
• Informal style of leadership and communication

Reasons to join the team

• Build a successful product that grows dynamically within the US market
• Friendly and open-minded co-workers
• Career development opportunities
• The right tools you need to be successful

Project description

We are seeking a highly motivated and technically proficient QA Hybrid Test Engineer to join our dedicated testing team. You will play a crucial role in ensuring the successful and high-quality delivery of software products for our client, a prominent American automaker.
This position offers a challenging and dynamic environment within a multicultural international team, demanding strong problem-solving skills and a proactive approach.

Responsibilities

Design, develop, and execute robust automated test scenarios on a daily basis, utilizing Python as the primary scripting language.

Framework Management: Actively contribute to a new and maintain the existing automation frameworks

Ensure comprehensive test coverage by writing detailed test scenarios

Engage in specialized testing of automotive systems, including validation of in-vehicle components

Work closely with developers, business analysts, and product owners within the Scrum framework, actively participating in sprint planning and daily stand-ups.

Skills

Must have

Prior work with embedded or automotive systems, especially in the context of multi-ECU scenarios.

Proven experience developing, debugging, and maintaining Python code for automated testing.

Thoroughly analyze logs, and quickly resolve issues within automated testing pipelines.

Experience managing Python virtual environments and dependencies.

Experience with Git for version control and JFrog Artifactory

Ability to read and follow technical documentation in English.

Strong communication skills for collaboration with developers, testers.

Nice to have

Experience with test automation for automotive multimedia, connectivity, and driver-assistance features.

Hands-on expertise with modern test automation frameworks, especially those supporting Behavior-Driven Development (BDD) and keyword-driven testing.

Skilled in translating requirements and Gherkin scenarios into robust, executable automation logic.

Ability to analyze, optimize, and troubleshoot both hand-written and AI-generated Python test scripts for reliability and maintainability.

Experience integrating automated tests with Hardware-in-the-Loop (HiL) and Software-in-the-Loop (SIL) benches via industry-standard APIs (such as ASAM HIL).

Hands on experience with testing of ADAS features such as Camera, Parking Assist, and Driving Assistance modules.

Experience with requirements gap analysis, traceability, and coverage reporting for ADAS or other safety-critical automotive systems.

Exposure to automotive communication protocols (e.g., CAN, LIN, Ethernet).

Languages

English: B2 Upper Intermediate

We are looking for a proactive Events & Communications Manager (Strong Junior/Middle) to support our marketing team in planning and executing both offline and online promotional activities. This role combines event management, brand coordination, content production support, and collaboration with external partners and contractors.

You will work closely with the Marketing Manager and play a key role in strengthening Payop’s brand presence through events, partnerships, and content-driven initiatives.

Requirements

• 1+ years of experience in event management, marketing coordination, or a similar role.
• Hands-on experience with offline events (conferences, expos, partner events), ideally international, including coordination of logistics, schedules, travel, and timelines.
• Experience working with vendors, contractors, and external partners (stand builders, suppliers, production teams).
• Comfortable coordinating speakers, participants, and internal stakeholders for events and content.
• Strong attention to detail and the ability to manage multiple tasks at the same time while keeping deadlines and budgets under control.
• English level: B2 or higher.
• Experience with task management tools (Jira, Asana, Notion, Trello, or similar) is a plus.

Responsibilities

• Plan and coordinate complex offline events (international conferences, expos, partner events). Organise business travel, logistics, and team schedules.
• Manage brand visibility at events and coordinate external contractors (stands, branding materials, placements).
• Organise the full merchandise creation process and coordinate with designers, suppliers, and logistics partners.
• Ensure all event-related activities are delivered on time and within scope.
• Prepare and organise press packs for partners and events.
• Organise and coordinate online events (webinars, virtual meetups, partner sessions). Manage timelines, speakers, and technical setup together with the internal team.
• Coordinate YouTube video shoots, podcasts, and other content formats. Manage schedules, participants, and basic production logistics.
• Assist the Marketing Manager with promotional campaigns and brand initiatives.

Nice to have

• Basic understanding of online events (webinars, virtual meetups, live sessions).
• Experience coordinating content production (YouTube videos, podcasts, interviews) is a plus.
• Ability to manage schedules and basic production logistics (no deep technical skills required).

What you will get with us

• Team-oriented and encouraging work environment.
• Career development opportunity.
• Paid vacation & sick leaves.
• Corporate English classes.
• Paying taxes and conducting private entrepreneurs.
• Internal Referral program.
• Remote-based work.

Hiring Stages
CV screening→ Interview with Recruitment Specialist →Test → Interview with Hiring Manager → Job Offer

This is not an enterprise role.
We move fast, make decisions locally, and expect engineers to own outcomes end-to-end.
If you’re looking for heavy process, rigid roadmaps, or decision-making by committee, this role will likely feel frustrating.

What You’ll Do

• Build production-grade AI systems, not demos — deeply integrated LLMs, agentic workflows, retrieval systems, and decision engines that real customers depend on.
• Design and ship end-to-end product features across frontend, backend, and services using TypeScript, React, Node.js, and GraphQL.
• Take ambiguous, messy real-world problems and turn them into working systems — fast.
• Own technical and product decisions, understand the trade-offs, and take responsibility for outcomes, not just output.
• Work hands-on with vector databases, search indexes, MongoDB, and event-driven architectures.
• Build fast, elegant, high-quality UIs with a strong opinion on usability and design (Tailwind, ShadCN).
• Instrument systems with metrics, evals, and feedback loops to continuously improve AI quality and product impact.
• Move quickly, iterate relentlessly, and raise standards without adding bureaucracy.

What We Care About

• Your depth of thinking, learning speed, and technical curiosity
• Your obsession with AI, LLMs, agentic systems, and applied research
• Your ability to figure things out independently
• Your willingness to make decisions and live with the consequences

• Your focus on real users, real data, and real impact

   

We do not care about:

• Fancy job titles
• Years spent in large enterprises
• Rigid processes, ticket queues, or “that’s not my responsibility” thinking
   

Requirements

• 3+ years of commercial software development experience (startup, scale-up, or equivalent).
• Strong fundamentals in JavaScript / TypeScript and modern web/backend development.
• Experience building systems with Node.js, React, GraphQL, and MongoDB (or demonstrably equivalent stacks).
• Strong interest in — or hands-on experience with — LLMs, AI systems, agentic workflows, or intelligent automation.
• Ability to work without hand-holding, unclear specs, or excessive process.
• Product mindset: you think in outcomes, metrics, and user value, not just features.
• Fluent English and clear written communication

Strong Plus

• Hands-on experience with LLMs, vector databases, RAG systems, embeddings, AI evaluation.
• Experience designing event-driven or distributed systems.
• Familiarity with GCP and/or AWS, Docker, Kubernetes.
• Experience with search infrastructure, message brokers, and data pipelines.
• Interest in AI research, experimentation, and pushing systems beyond obvious solutions.

Who Will Thrive Here

• Builders who love hard problems and fast feedback.
• People who get frustrated by slow decision-making and unnecessary meetings.
• Engineers who want ownership, autonomy, and accountability.
• Product-minded developers who care deeply about quality, design, and user experience.
• AI-first thinkers who want to be close to the model, the data, and the customer.

Why Join ChefsList

• Build real AI-driven products used daily by businesses.
• Work at the intersection of AI, engineering, and product, not in silos.
• High trust, very low bureaucracy, and extreme ownership.
• Fast-moving startup where your work ships and matters.
• Competitive compensation, flexibility, and continuous learning opportunities.

🧠 About Us

At EPC Network, we’re not just a digital marketing company; we’re a platform for career transformation and personal growth. Our people-first approach shapes our corporate culture, fostering a team of passionate, smart, and energetic individuals who strive to grow professionally in an international, fast-paced environment.

We believe our Team is the foundation of our success, and now we’re looking for a Senior Web / Graphic Designer to join our Design & Marketing team!

🎯 Job Description

As a Senior Web / Graphic Designer, you’ll create and launch opt-in pages, landing pages, and newsletter websites that are not only visually strong but also optimized for conversions.

You’ll work hands-on in tools like ClickFunnels, Leadpages, and Beehiiv, designing and building pages that directly support growth, lead generation, and monetization. This role requires both strong design taste and confidence in implementation — not just static visuals.

🔧 Key Responsibilities

• Design and build landing pages, funnels, and opt-in pages using ClickFunnels, Leadpages, or similar tools
• Set up and format newsletter websites directly in Beehiiv
• Create high-quality banners, headers, and graphics for web and email campaigns
• Ensure all pages are responsive, mobile-friendly, and performance-optimized
• Maintain brand consistency across all visual assets
• Collaborate closely with marketing and content teams to align visuals with campaign goals
• Iterate quickly based on feedback, performance data, and testing results

📌 Requirements

• 4+ years of experience in web design (not limited to static graphics or branding)
• Proven experience creating landing pages, funnels, and conversion-oriented websites
• Proficiency with ClickFunnels, Leadpages, Webflow, or similar page builders
• Strong understanding of layout, spacing, UX hierarchy, and conversion-focused design
• Experience with Adobe Creative Suite, Figma, or Canva
• Basic knowledge of HTML/CSS is a plus (not mandatory)
• Fast, organized, detail-oriented, and able to manage multiple projects simultaneously
• English level: C1 or higher, with strong communication skills

📌 Nice to Have

• Experience with A/B testing or performance-based design iteration
• Understanding of marketing funnels, lead generation, or affiliate campaigns

🤝 What it means to be part of our Team

Your professional and personal development:
🙋 Multinational and intercultural experience
📚 Corporate library
💪 A world-class team to work with
🎓 Growth opportunities
💻 Cutting-edge frameworks and technologies

Well-being:
💰 Competitive salary
🎳 Plenty of engaging team-building and social events
🎁 Bonuses according to the policy
🏖️ 21 paid vacation days & 14 paid sick leaves
🧘 Work-life balance

Working environment:
🏢 Cozy office in Warsaw available for you whenever you need it
🥪 Coffee, tea, Red Bull, sweets, fruits, and more snacks
🧐 Adequate teammates

💌 Interested?
We’re always on the lookout for passionate, driven, and curious people to join our team.
If that sounds like you — we’d love to hear from you!

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.

We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.

Meet the team!

We’re on a mission to transform lives through learning. In our Learning Teams, that means building the next generation of personalized, AI-enabled, media-rich experiences for learners and tutors around the world. If you care deeply about impact, quality, technology and culture – this is your chance to lead a part of it.

As a Staff Engineer in the Learning Teams, you will lead some of the most complex and strategic engineering initiatives at Preply. You will define and drive technical roadmaps and architecture, collaborate across product, engineering and business stakeholders, and influence our platform at scale. This is a senior individual contributor role with broad scope and strong impact – you will help shape how we build, ship and evolve our learning experiences globally.

What you’ll be doing

• Shape, drive, and co-own the Learning Teams’s engineering strategy and own technical roadmap, partnering with Engineering and Product Leadership s to align initiatives, priorities and dependencies.
• Lead end-to-end strategic initiatives and innovations, translating high-level product vision into technical execution, align scope and milestones and ship iteratively with measurable outcomes.
• Evolve architecture and core services into a scalable, reliable platform, defining target states, drive deprecations and migrations, and uphold technical excellence (availability, performance, cost).
• Raise engineering practices and developer experience, driving RFCs, post-mortems, quality frameworks (evaluations, instrumentation), identifying bottlenecks and driving initiatives that reduce toil and increase productivity across team
• Operate as a multiplier: mentor and influence senior engineers, Tech Leads, EMs, and hiring panels; stay hands-on for the hardest, most impactful work.
• Make build-vs-buy and vendor/tooling calls with a clear view of total cost of ownership; lead evaluations and participate in negotiations.

What you'll bring

• Strong foundation in software engineering and architecture; comfortable designing and evolving large-scale systems and deriving technical strategy from business objectives.
• Proficiency across the full stack, from frontend frameworks and mobile clients to backend systems, APIs, and data flows, with a focus on cohesive end-to-end experiences.
• Hands-on technical expertise, comfortable diving deep into code, building proofs-of-concept, and iterating quickly with teams to validate technical approaches.
• Excellent communication and leadership skills, able to articulate technical vision, trade-offs, and business value to both engineering, product and executive stakeholders. Able to influence without formal authority.
• Proven track record of taking ownership end-to-end, from defining scope, through delivery, launch, and operational stability.
• Analytical and creative problem-solving skills, able to explore multiple implementation paths, evaluate trade-offs, and make pragmatic decisions under uncertainty.
• Ability to operate across domains, new feature development, architecture evolution, system migrations, process improvement – all matters.
• Proven experience driving engineering culture, mentoring senior engineers, influencing tech leads, leading hiring for key roles, establishing and evangelising RFCs, post-mortems, etc.

• Experience or strong interest in one or more of these domains: AI/ML, media/video platforms, large-scale system migrations, cost optimisation, data infrastructure, QA/test-automation at scale.

   

Why you’ll love it at Preply:

• An open, collaborative, dynamic, and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budget, and time off for your self-development;
• A competitive financial package with equity, leave allowance, and health insurance;
• Access to free mental health support platforms;
• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)

Responsibilities
 

Develop and maintain web applications using React.js (Frontend) and Node.js (Backend).
Work with RESTful APIs and databases (MongoDB, PostgreSQL).
Write clean, efficient, and maintainable code.
Collaborate with designers, backend developers, and product managers to deliver high-quality solutions.
Participate in code reviews and continuously improve development processes.
Debug and fix issues in existing applications.
 

Requirements
 

Basic knowledge of JavaScript/TypeScript, HTML, and CSS.
Experience with React.js and Node.js (academic, personal, or internship projects).
Understanding of REST API principles and client-server architecture.
Familiarity with database management (MongoDB, PostgreSQL or similar).
Experience with Git and version control workflows.
Strong problem-solving skills and a willingness to learn.
English level: B1 or higher
 

Nice to Have

Experience with Redux, Next.js, Express.js, Nest.js.
Basic understanding of Docker, CI/CD pipelines.
Knowledge of testing frameworks (Jest, Cypress).
Familiarity with cloud services (AWS, Firebase).
 

What We Offer

Interesting and challenging projects.
Vast opportunities for professional development.
Competitive salary.
The friendly team of professionals.
Comfortable working environment.

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.

We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.

What you’ll be doing:

• Develop high-quality, scalable, and reliable features for Preply mobile applications using React Native and launched in our A/B experimentation framework.
• Collaborate with cross-functional teams, including UX designers, product managers, and other engineers, to deliver innovative solutions that empower our learners and educators.
• Share your knowledge and expertise with the team and continuously learn from others to foster a culture of continuous learning and growth.
• Write clean, maintainable, and efficient code that sets the standard for excellence, contributing to the overall performance and code quality
• Participate in code reviews and ensure code quality to maintain our high standards.
• Continuously improve software engineering practices and methodologies to stay ahead of the curve and deliver value to our users.

What you need to succeed

• 5+ years in mobile development with React Native.
• Proficiency in JavaScript/Typescript and experience with popular React Native libraries (e.g. Reanimated, Apollo Client, Expo, React Navigation).
• Commitment to excellence and problem-solving skills to debug complex issues.
• Great communication skills and ability to collaborate with cross-functional teams to deliver results.
• Experience with agile software development methodologies to help us move fast and deliver value.
• Experience writing unit and e2e tests

Why you’ll love it at Preply

• An open, collaborative, dynamic and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for your self-development;
• A competitive financial package with equity, leave allowance and health insurance;
• Access to free mental health support platforms;
• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.

We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.

We power people's progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. So far, 90,000 tutors have delivered over 20 million lessons to learners in more than 175 countries. Every Preply lesson sparks change, fuels ambition, and drives progress that matters.
 

Meet the team!

Join Preply’s Teams and help us power people’s progress through life-changing learning experiences. We’re on a mission to combine the magic of the best tutors with cutting-edge AI to create personalized journeys that keep learners motivated and inspired. The Preply Engineering Team provides the tools to help unlock human potential through learning.

Our team builds scalable, resilient applications using the powerful combination of Python/Django on the backend and ReactJS on the frontend — all to deliver an exceptional, seamless experience to our users.

We’re proudly tech-agnostic, meaning we’re open to candidates with a variety of technical backgrounds, whether that’s Java/Spring, Node.js/Express, Ruby on Rails, Scala/Play, PHP, or Golang.

While Python is our main language, prior experience with it isn’t required. What matters most is your willingness to learn, your ability to adapt quickly, and your enthusiasm for using Python in product-focused development.

We implement A/B tests to prove the value of our initiatives and improve our product based on data and students' and tutors' feedback. As part of our commitment to ensuring high-quality products, we prioritize monitoring and metrics analysis to identify areas for optimization and ensure our services are performing at their best. 

At Preply, we release our product 50-60 times per day by leveraging top-notch CI/CD processes. As a fast-growing company we have diverse technical challenges (sometimes we even write about them on our Engineering Blog) that will allow you to develop your skills at scale. 

What you’ll be doing:

You will work in a cross-functional team alongside the Product Manager, Product Designer, UX Writers, Data Analytics, Technical Leads, Engineers and other cross-functional team members to deliver engaging features through A/B tests and build top-notch products, including, but not limited to:

• Develop and own backend features using Python/Django, supporting the creation of new backend services as well as design, create, and/or troubleshoot integrations with third-party vendors.
• Think beyond the code and about our customers, understand their needs, and define solutions with the team;
• Balance short-term speed of development with the long-term technical quality of our systems;
• As a Senior Engineer, you will leverage your experience to guide the team in making informed technical decisions, such as continuous improvement of best practices (test culture, code reviews, monitoring and scalability of our tools). 

What you need to succeed:

• Exposure to architectural patterns of a large, high-scale web application (e.g., well-designed APIs, high-volume data pipelines, efficient algorithms);
• Familiar and willing to support small JS/TS tasks when needed;
• Expertise in troubleshooting issues, identifying the root cause, mitigating it, and setting up safeguards to prevent future issues;
• High level of self-organization, ownership, and responsibility;
• A great collaborator with excellent verbal and written communication skills. Minimum B2 English level;
• Willingness to be on-call for your squad (1 week every 5 weeks).

Why you’ll love it at Preply: 

• An open, collaborative, dynamic, and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budget, and time off for your self-development;
• A competitive financial package with equity, leave allowance, and health insurance;
• Access to free mental health support platforms;
• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)

We are looking for a specialist to design and implement an end-to-end performance testing framework for a healthcare system running on Databricks and Microsoft Azure. You will build a repeatable, automated approach to measure and improve performance across data ingestion, ETL/ELT pipelines, Spark workloads, serving layers, APIs, security/identity flows, integration components, and presentation/UI, while meeting healthcare-grade security and compliance expectations.

This role sits at the intersection of performance engineering, cloud architecture, and test automation, with strong attention to regulated-domain requirements (privacy, auditability, access controls).

Key Responsibilities

• Design and build a performance testing strategy and framework for a Databricks + Azure healthcare platform.
• Define performance KPIs/SLOs (e.g., pipeline latency, throughput, job duration, cluster utilization, cost per run, data freshness).
• Create workload models that reflect production usage (batch, streaming, peak loads, concurrency, backfills).
• Create a test taxonomy: smoke perf, baseline benchmarks, load, stress, soak/endurance, spike tests, and capacity planning.
  
   
• Implement automated performance test suites for:
  • Databricks jobs/workflows (Workflows, Jobs API)
  • Spark/Delta Lake operations (reads/writes, mergers, compaction, Z-Ordering where relevant)
  • Data ingestion (ADF, Event Hubs, ADLS Gen2, Autoloader, etc. as applicable)
• Build test data generation and data anonymization/synthetic data approaches suitable for healthcare contexts.
• Instrument, collect, and analyze metrics from:
  • Spark UI / event logs
  • Databricks metrics and system tables
  • Azure Monitor / Log Analytics
  • Application logs and telemetry (if applicable)
• Produce actionable performance reports and dashboards (trend, regression detection, run-to-run comparability).
• Create performance tests for key user journeys (page load, search, dashboards) using appropriate tooling.
• Measure client-side and network timings and correlate them with API/backend performance.
• Integrate performance tests into CI/CD (Azure DevOps or GitHub Actions), including gating rules and baselines.
• Document framework usage, standards, and provide enablement to engineering teams.

Required Qualifications

• Proven experience building performance testing frameworks (not just executing tests), ideally for data platforms.
• Strong hands-on expertise with Databricks and Apache Spark performance tuning and troubleshooting.
• Strong knowledge of Azure services used in data platforms (commonly ADLS Gen2, ADF, Key Vault, Azure Monitor/Log Analytics; others as relevant).
• Strong programming/scripting ability in Python and/or Java/TypeScript.
• Familiarity with load/performance tools and approaches (e.g., custom harnesses, Locust/JMeter/k6 where appropriate, or Spark-specific benchmarking).
• Ability to design repeatable benchmarking (baseline creation, environment parity, noise reduction, statistical comparison).
• Understanding of data security and compliance needs typical for healthcare (e.g., HIPAA-like controls, access management, auditability; adapt to your jurisdiction).
• High-level proficiency in English

Nice-to-Have / Preferred

• Experience with Delta Lake optimization (OPTIMIZE, ZORDER, liquid clustering where applicable), streaming performance, and structured streaming.
• Experience with Terraform/IaC for reproducible test environments.
• Knowledge of Unity Catalog, data governance, and fine-grained access controls.
• Experience with OpenTelemetry tracing and correlation across UI → API → data workloads.
• FinOps mindset: performance improvements tied to cost efficiency on Databricks/Azure.
• Prior work on regulated domains (healthcare, pharma, insurance).

 Working Model

• Contract
• Remote
• Collaboration with Data Engineering, Platform Engineering, Security/Compliance, and Product teams.

We are looking for a skilled Senior С++ Engineer. 

Responsibilities:

• Design, develop, and maintain C++ applications and services that interact with embedded systems. 
• Collaborate with other engineers to integrate C++-based software with embedded systems and sensors, enabling seamless data exchange and device control.
• Identify, troubleshoot, and resolve software-hardware integration issues, ensuring high-quality, reliable, and performant solutions.

Requirements:

• 4+ years of experience in software development (preferably in software-hardware)
• Solid understanding of embedded systems, microcontrollers, and hardware-software interaction.
• Strong expertise in C++, with experience in performance optimization, multithreading, and I/O operations in resource-constrained environments.
• Experience with serial communication protocols (e.g., UART, SPI, I2C).
• Experience in Linux/Unix environments and tools (e.g., Git, SSH, command-line utilities).
• Experience with single board PCs (e.g., Raspberry Pi, Arduino, etc.).
• Experince with MAVLink protocol. 

Will be a plus:

• Knowledge of cloud technologies or IoT platforms (e.g., MQTT, AWS IoT, Google Cloud IoT). 
• Experience using Sine.Link and Starlink tech for development. 
• Experience with Python for development, including scripting, testing, and automation, as well as its use in embedded systems.
• Understanding of drones firmware. 
  
   We provide reservations from mobilization