Jobs

We are seeking a hands-on Tech Lead / Solution Architect to shape and scale our next-generation iGaming platform. This role blends deep technical expertise, architectural design, and leadership skills to ensure our systems meet the demands of high-volume, real-time, and regulated environments.

Requirements:

• Proven experience in building Monolithic, Microservices, and Event-driven architectures, including decomposition of legacy systems into scalable microservices.
• Designing and implementing high availability (HA), fault-tolerant, and load-balanced solutions for large-scale, high-traffic applications.
• Orchestration Engines: Hands-on experience with workflow orchestration platforms (e.g., Camunda, Temporal) for process automation and distributed workflows.
• Strong expertise in designing scalable database schemas and managing both relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) systems with focus on performance optimization and horizontal scaling, Rabbit, Kafka.
• Knowledge of VMware-based infrastructure as well as modern container orchestration platforms (Docker, Kubernetes). Nice to have: Apache Spark, Hadoop.
• Building robust CI/CD pipelines using GitLab CI/CD, enabling continuous delivery and deployment across complex environments.
• Practical development skills in PHP (Laravel, Laravel Octane), Node.js, JavaScript, Next.js, React. 
• Setup and integration of monitoring/alerting systems (Prometheus, Grafana, Kibana, ELK Stack, Sentry) for proactive issue detection and performance analysis.
• Deep understanding of automation-first approaches, infrastructure as code, and collaboration between development and operations.
• Proven ability to lead teams, mentor engineers, and align technical decisions with business goals. Skilled at translating business requirements into efficient technical solutions.
• Experience in using AI technologies

Nice to Have:

• Experience analyzing technical risks and defining mitigation strategies.
• Expertise in building PoC (Proof of Concept) and MVP (Minimum Viable Product) to validate business ideas quickly.
• Familiarity with architectural modeling tools (Lucidchart, Draw.io, C4 Model).
• Experience in multi-region deployments and scaling distributed systems across hybrid environments (cloud + on-premise VMware setups).
• Background in designing mission-critical financial, e-commerce, or enterprise-grade systems with strict SLAs and compliance requirements.

Responsibilities:

• Evaluation and clarification of incoming functional business requirements from customers and business analytics in specification format;
• Creation of technical specifications following functional business requirements;
• Building of services and infrastructure architecture according to technical specifications;
• Control of compliance of new solutions to the general architecture;
• Technical risks evaluation for services performance and infrastructure, and potential solutions development for mitigation;
• Services and infrastructure evolving and optimization;
• Performance, security, and stress testing planning and supervision found vulnerabilities and issues resolving;
• Architecture and technical solutions presentation and discussion with technical Leads and members;
• Supervision of technical solutions compliance to project requirements;
• Maintenance of technical documentation and development regulations;
• Requirements analysis, technical design, scope decomposition, and estimation with the technical teams;
• New projects and services of the company evaluation for compliance with the existing regulations and methodologies;
• Mentor development team members and Senior technical staff in the architecture area;
• Establishment and development of new technological practices for the company.

What we offer:

• Competitive salary;
• Remote work in a flexible environment;
• 20 working days of paid vacation and education projects;
• Great product with our software solution;
• Opportunity for growth at professional levels, attending top industry events and conferences, and international workshops at our competence centers.

Don’t delay! Send your CV right now and join our highly professional and ambitious team!

Senior Fullstack Engineer – React, NestJS, AWS

We're a growing tech startup building a customer-facing web platform and an internal AI model training platform. We're looking for a Senior Fullstack Engineer to join our engineering team and take real ownership of core systems.

This is a role for engineers — people who understand code deeply, think about architecture, and solve problems independently. Not someone who completes tasks, but someone who thinks about why they exist.

Responsibilities:

• Develop and maintain the full-stack platform (React frontend, NestJS backend, AWS infrastructure)

• Design and implement scalable backend services and APIs

• Work with Postgres RDS — design, optimize, and maintain relational data models

• Build and maintain event-driven services using SQS and microservices architecture

• Write unit and e2e tests (Vitest + Cypress) and maintain CI/CD pipelines (GitHub Actions)

• Write clean, modular code following SOLID principles

• Collaborate directly with Product to translate requirements into technical solutions

Requirements:

• Senior-level experience with React, NestJS, and TypeScript (frontend + backend)

• Hands-on experience with AWS (Lambda, EC2) and Docker

• Strong understanding of relational databases and Postgres

• Experience with microservices, event-driven architecture, and SQS

• Solid Git workflow and experience working in a team codebase

• Ability to read, understand, and improve unfamiliar code independently

• Clean code standards — SOLID, well-structured, maintainable

What We Value Most:

Independent thinking. We want engineers who trace problems to their root, understand the full flow of a system, and bring solutions — not just questions. If you read code before you Google, you'll fit right in.

AdversterX is a marketing and advertising agency with 12 years of experience in affiliate marketing, media buying, and developing technological solutions for traffic management.

Our verticals are iGaming, Adult, Essay, Games,Nutra and Dating industries. We are a highly ambitious and rapidly growing company, and we are now actively working on developing our own products in the Online Casino and Essay fields, while constantly scaling and expanding into new markets. Also, we have a recruiting agency too.

With years of expertise under our belt, we thrive in helping our partners achieve their goals through strategic and data-driven media buying efforts.
AdversterX is a society of digital entrepreneurs united with one goal: to innovate in the digital marketing space.

We are looking for an experienced Affiliate Manager to lead our affiliate marketing efforts. The ideal candidate should have a strong understanding of the iGaming industry, and a proven record of managing successful affiliate campaigns.

We would like to grow our Affiliate manager to the Team leader position. 
 

What you’ll be working on:

• Find and engage new partnerships, maintain long-term mutual cooperation on a win-win basis;
• Support and retention of existing partners to maximise LTV;
• Adjusting tracking and full-cycle setup of the offers/campaigns;
• Daily monitoring and performance optimization of dedicated pool of affiliates: checking stats, confirming bumps or decreases in rates, scaling of profitable campaigns, adding and testing new sources;
• Control on traffic quality and partner’s payouts approval;
• Raising network brand awareness via industry forums/chats activity & participation in conferences (both local and international);
• Regular competitors and trends analysis in terms of new creative approaches, offer monetization models, emerging traffic types, marketing angles and innovative ways of communication with partners.

About you:

• Experience of working in iGaming/betting vertical for more than 2 years;
• Experience with known tracking solutions: hasoffers/affise/cake/in-house or another;
• Practical knowledge of how to set up postbacks for correct stats transfer;
• Understanding of basic affiliate metrics, unit economics and models of cooperation: CPA, CPL, CPS, Revenue Share, EPC, ROI;
• Global understanding of online advertising markets: traffic sources, verticals, monetization models;
• Analytical skills and ability to find growing points;
• Experience in creating technical tasks for designers/developers: landing pages, functional tuning, etc.;
• Participation in events/conferences;
• English language level - B2.

Why work with us?

• No bureaucracy or micromanagement;
• Cool & creative international team worldwide;
• Flexible working hours, full remote;
• Educational program, tailored for our business needs;
• English lessons;
• Paid time-offs (21 working days of vacations, 14 working days of sick leave);
• No time trackers;
• Paid events/conferences.

Tango is a successful, market leader, a live-streaming Platform with 450+ Million registered users, in an industry projected to reach $240 BILLION in the next couple of years. 

The B2C platform, based on the best-quality global video technology, allows millions of talented people around the world to create their own live content, engage with their fans, and monetize their talents.

Tango live stream was founded in 2018 and is powered by 500+ global employees operating in a culture of growth, learning, and success!

The Tango team is a vigorous cocktail of hard workers, creative brains, energizers, geeks, overachievers, athletes, and more. We push the limits to bring our app from “one of the top” to “the leader”. 

The best way to describe Tango's work style is not to use the word “impossible”. We believe that success is a thorny path that runs on sleepless nights, corporate parties, tough releases, and of course our users' smiles (and as we are a LIVE app, we truly get to see our users all around the world smiling right in front of us in real-time!). 
 

Responsibilities

• Work in SCRUM team 
• Design and develop high-load microservices
• Write high-quality code covered with different levels of tests
• Maintain services on production and assure their stability and performance
• Provide code review for teammates 
• Contribute to the Company’s development processes and practices 
   

Requirements

• Writing code in a clean and maintainable manner.
• Solid experience with Java 8+ 
• Experience with SQL/NoSQL databases
• Understand microservice architecture patterns.
• Good at Spring framework.
• Experience with REST, messaging systems.
• Ability to cover code by different types of tests.
• Understanding of SOLID principles
• Experience with Git 
• Excellent troubleshooting skills.
• Good communication skills.
• Intermediate+ English
   

Would be great to have:

• Experience with Kafka, MySQL, Redis, Aerospike.
• Experience with Spring Boot, Spring Cloud
• Experience with Docker, Kubernetes
• Experience in high-load
   

What we offer:

• International company with several offices in different locations : Tel-Aviv, Kyiv, Warsaw, Limassol.
• Granting an Option;
• A professional environment with great people to work with;
• Competitive salary, performance review;
• Flexible working hours, no one here tracks your work time because our culture is built on trust and cooperation;
• Social and welfare packages;
• 20 working days paid vacation and 100% sick leaves coverage;
• Opportunities to make a difference, to develop and grow;
• Regular corporate celebrations, team buildings and fun activities;
• Comfortable office close to the metro station. Our Kyiv office is open 24/7 with all safety and health measures in place.

Eldorado is a fast-growing iGaming product focused on player engagement, retention, and long-term value in international markets.

We are looking for a Head of Affiliates to build and scale our affiliate program, drive high-quality acquisition, and develop long-term partner relationships across key markets.

Responsibilities:

• Build and execute affiliate marketing strategy across LATAM and other regions
• Manage and scale affiliate program (CPA, RevShare, Hybrid models)
• Identify, onboard, and grow high-performing affiliates and networks
• Develop long-term partnerships and negotiate commercial terms
• Monitor traffic quality, fraud, and ROI performance
• Work closely with product, CRM, and analytics teams to improve conversion and retention
• Analyze campaign performance (ROI, LTV, CPA) and optimize accordingly
• Lead and grow affiliate team

Requirements:

• 5+ years of experience in affiliate marketing within iGaming
• Strong experience working with LATAM markets is a must
• Proven track record of scaling affiliate programs and driving revenue growth
• Deep understanding of traffic sources, funnels, and conversion optimization
• Strong negotiation and relationship management skills
• Experience with affiliate platforms and tracking tools
• Analytical mindset (ROI, LTV, performance metrics)
• English — Upper-Intermediate+

Eldorado is a fast-growing iGaming product focused on international markets, with a strong focus on LATAM.

We are looking for a Head of Marketing to lead our global marketing strategy, drive acquisition, and scale performance across key channels.

Responsibilities:

• Develop and execute full-funnel marketing strategy (acquisition, brand, performance)
• Lead and scale marketing team (media buying, affiliates, CRM, content)
• Manage and optimize paid traffic channels (FB, Google, TikTok, programmatic)
• Drive affiliate program growth and partnerships
• Work closely with product, analytics, and retention teams
• Own marketing budgets, CAC, ROI, and performance metrics
• Identify new growth opportunities in LATAM and other regions

Requirements:

• 5+ years in iGaming marketing
• Proven experience in LATAM markets is a must
• Strong expertise in performance marketing & user acquisition
• Experience managing large budgets and scaling campaigns
• Data-driven mindset and strong analytical skills
• Leadership experience managing cross-functional teams
• English — Upper-Intermediate+

Please provide your CV and LinkedIn profile. We demand your LinkedIn profile with actual working experience to move forward with your application!

Fundomate is looking for a Senior Java Back-End Developer to join our team. Fundomate is an innovative fintech company operating in the alternative lending space and providing both direct-to-business and white-label turnkey solutions.

You will be good match if:

- You have history of solving non trivial problems in one of your previous projects

- You have wide technology background (backend, frontend, devops, ops, mobile development, etc), so you will understand the connections between technologies and expand this knowledge with domain and business needs. 

- You have experience working in US fintech domain 

We will be good match if:

- You want to solve (or learn to solve) complex business problems

- You want to experiment with processes/development technics/tools

- You are interested in continuous improvement and automation of product and working process

Requirements:

- 6+ years of experience developing web applications

- 3+ years of experience in any IoC & DI framework (Spring, Quarkus, Micronaut, etc.)

- TDD experience in production is a must have

- Experienced in pair programming

- Good knowledge of MicroServices (Kubernetes knowledge is a plus)

- Experience working with tools like Git, Gradle, Jenkins or similar CI/CD

- Working experience in Industry Standard protocols related API Security including OAuth (KeyCloak is a plus)

- Working experience with RDBMs like Postgres/MySQL or any similar

- Understanding of asynchronous message-based communication like Kafka, GCP Pub/Sub, AWS SNS/SQS, etc. (Kafka as an advantage)

- Strong Agile/Scrum/Kanban development experience

- Experience in third party systems integration (XML or JSON api)

- Knowledge of any cloud provider (AWS as an advantage)

Our technical Stack:

- Java 25

- Microservices (Quarkus)

- Postgresql/MySQL

- Kafka

- Keycloak

- Kubernetes & Docker

- AWS (EKS, MSK, RDS, etc.)

- Gradle

- Bitbucket pipelines, gitops approach

- Lombok, MapStruct, Flyway

We offer:

- Innovative product with modern technology stack

- Competitive salary (paid in $)

- Social package (paid vacations, sick leaves and etc)

- PE accounting and support

- WFH and remote working mode possibility, Ukrainian working hours

- No bureaucracy, micromanagement and time-tracking

Full Stack Developer

[Full-time, Remote, Freelancer]

SNEAK PEEK 

⇨ Location: Remote, GMT+0/GMT+4

⇨ Interview process: HR interview ⇨ technical interview ⇨ take-home challenge ⇨ final interview ⇨ offer 

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, machine-learning technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. 

THE ROLE

We are looking for an experienced Full-Stack developer with a passion for building complex systems to further expand our set of internal tools. You will architect and develop our core internal systems, understand and predict user interactions, and create well-written code, based on the business needs. You will work closely with other developers and QA testers, using the Agile methodology and a quality-first approach.

Hiring manager: Nadav Nagel, Software Team Lead 

WHAT ARE WE LOOKING FOR?

• 5+ years of commercial experience building publicly available websites
• 3+ years of experience in backend development using Typescript and Node.js
• Up-to-date with at least one of the latest UI frameworks (React, Vue.js, etc.)
• Detail-oriented and able to adhere to deadlines
• Excellent communication skills in both written and verbal English

INTERESTED?

Our recruitment process consists of the following steps: 

• HR interview: 30 min
• Take-home challenge.
• Technical interview: 60 min
• Final interview

Backend AI Engineer

[Freelance, Full-time, Remote]

SNEAK PEEK

⇨ Location: Remote, GMT+0/+4

⇨ Interview process: HR Interview ⇨ Technical interview ⇨ Take-home challenge ⇨ Presentation of home challenge 

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, machine-learning technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. You can find out more info about us here: www.rounds.com.

THE ROLE

We’re looking for a passionate AI engineer to join our dynamic AI Innovation Team, which is the driving force behind technological advancement in our company. Here, you will use cutting-edge AI technologies to boost productivity and make extraordinary ideas a reality.

We're excited to meet someone who is AI-obsessed, has a strong sense of product ownership, is ready to take initiative and who is full of creative ideas. If this sounds like you, we want you to join our team!

Hiring manager: Alik Hochner - CTO, Ori Nahum - AI Innovation Team Lead 

KEY RESPONSIBILITIES

• Develop and maintain high-quality AI solutions for both internal teams and external users.
• Architect sophisticated AI agents, including multi-agent systems.
• Design and implement evaluation frameworks to assess AI performance, accuracy, and reliability.
• Collaborate across diverse teams to boost developer productivity.
• Continuously explore the evolving AI landscape and identify impactful tools for company growth.
• Shape the company’s best practices and guidelines for AI usage.

WHAT ARE WE LOOKING FOR?

Must-have:

• 5+ years experience in software development (preferably in Python or TypeScript).
• Skilled in prompt engineering and have a strong understanding of how LLMs work internally.
• Proven track record in developing AI agents from scratch and implementing effective AI solutions for businesses.
• Basic DevOps proficiency (CI/CD, Cloud).
• Quick learner who adapts effortlessly to new tools and approaches.
• Passionate and knowledgeable about current AI trends and best practices.
• Excellent English communication skills.

HOW DO WE WORK?

We are a distributed team of more than 150 people, all working remotely and communicating partially synchronously (we usually overlap with our teams for 5 hours daily and are free to work on some of the tasks whenever it suits us best). We value open communication, proactivity and work/life balance and we measure our freelancers on performance, rather than on the time spent on the job.

WHAT’S IN IT FOR YOU? 

• 100% remote work model
• Flexible full-time working hours 

INTERESTED?

Our recruitment process consists of the following steps: 

• HR interview with the recruitment manager: 45 min
• Technical interview with the AI Engineer Tech Lead: 1 hour
• Take-home challenge: ~ 4 hours of work
• Final Interview and Take-home challenge presentation with CTO and AI Engineer Tech Lead: 1 hour

Backend Engineer

[Freelance, Full-time, Remote]

SNEAK PEEK

⇨ Location: Remote, GMT+0/GMT+4

⇨ Interview process: HR interview + take-home challenge ⇨ technical discussion ⇨ final interview

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, AI technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. 

THE ROLE

This is a hybrid Backend/Platform Engineering role to lead cloud and backend systems migrations. It involves shipping backend solutions that move the needle at the scale of millions of dollars in business impact.

You will evaluate, plan, and migrate backend systems from various stacks and cloud providers (AWS, Azure, GCP, and more) into our infrastructure. By leveraging AI tools and automation, you will significantly accelerate migrations and modernization efforts.

This role suits Backend Engineers who aren't afraid to jump in and shape the DevOps stack.

Responsibilities

• Architect, evolve, and oversee backend infrastructure transformations (NodeJS, Python and more).
• Assess complexity, outline risks, and estimate effort and timelines.
• Rebuild or refactor backend/cloud components when needed, including rewriting services (with AI assistance).
• Utilize AI tools and agents to speed up research, refactoring, documentation, and investigations (Claude, Cursor and more).
• Design and maintain cloud environments using Infrastructure as Code (Terraform preferred) mainly for GCP, AWS and Azure.
• Build, maintain, and improve CI/CD pipelines.

Hiring manager: Igor Yakunin 

WHAT ARE WE LOOKING FOR?

Must-have:

• 5+ years Backend Engineering.
• Hands-on experience with GCP or strong AWS/Azure background and willingness to transition.
• Practical experience with Terraform (or similar IaC).
• Strong Linux, networking, and cloud fundamentals.
• Experience with Docker and containerized deployments.
• Proficiency in at least one backend language (Python, Node.js, Go, Java, etc.).
• Experience with SQL and/or NoSQL databases.

Nice-to-have:

• Experience with Kubernetes or other orchestration tools.
• Familiarity with CI/CD platforms such as CircleCI, GitHub Actions, GitLab CI, or ArgoCD.
• Experience with reverse-engineering unknown systems or digging through legacy setups.
• Experience with monitoring tools such as Datadog, Prometheus, or GCP Monitoring.
• Background in refactoring, rewriting, or modernizing backend services.

INTERESTED?

Our recruitment process consists of the following steps: 

• HR Interview (45 min) - Discuss your background and fit.
• Take-Home Challenge (~2 hours of work) - Practical assignment reflecting real work.
• Technical Interview (60 min) - Evaluate cloud, DevOps, and coding skills.
• Final Interview (60 min) 

Get in touch at hr@rounds.com. 

We look forward to hearing from you! 

We are toogeza, a Ukrainian recruiting company that is focused on hiring talents and building teams for tech startups worldwide. People make a difference in the big game, we may help to find the right ones.

We are currently looking for a Data Analyst for Spinlab.

Location: Remote
Job Type: Full-Time
 

About our client:
Spinlab: We help slot gaming leaders unlock the potential of their data, enhancing business outcomes and strengthening their competitive edge in the market. We collect and process data using advanced methods and technologies to provide our clients with clear, actionablerecommendations based on real metrics. SpinLab’s goal is not just to collect data but to help businesses use it for maximum efficiency and amplify their performance results.

 

Responsibilities:

• Analyze large volumes of game and player data to identify patterns, trends, and dynamics, and turn them into clear business conclusions.
• Translate findings into practical recommendations for product improvements, highlighting what works, what doesn’t, and what opportunities to explore
• Perform deep-dive investigations into performance anomalies or game features to explain what happened and why
• Collaborate with game designers, product managers, and developers to shape hypotheses and validate them through experimentation.
• Support development and testing of predictive models (e.g., player LTV, churn, bonus optimization).
• Communicate complex insights in a simple, compelling way to both technical and non-technical audiences.
• Help define metrics frameworks for new products or features, expanding high-level requirements with your analytical thinking and product insights.
• Build dashboards and reports to help stakeholders monitor key KPIs and make data-driven decisions.

Requirements:

• 3+ years of experience as a Data Analyst or Data Scientist, preferably in the gaming or tech industry.
• Strong analytical mindset and ability to find the story in the data: uncovering trends and explaining them in clear business terms.
• Strong experience in SQL (BigQuery, PostgreSQL, or similar), and comfort working with large datasets.
• Solid knowledge of data visualization tools (e.g., Tableau, Power BI, Looker, or similar).
• Practical experience with Python for data analysis and modeling.
• Familiarity with statistical testing, experimentation, and predictive modeling techniques.
• University degree in mathematics / computer science / technology / engineering
• English B2+

Will be a plus:

• Knowledge of the iGaming industry or understanding of slot game mechanics
• Ability to look at games from players’ point of view.
• Product mindset: the ability to go beyond numbers and propose actionable solutions that make an impact.

Benefits:

• Work on meaningful data products and shape them with your vision.
• 25 vacation days + 15 sick days + 1 birthday leave.
• Budget for English classes.
• Budget for health insurance.
• Annual education & development budget.
• Flexible, remote-friendly culture with a small, dedicated team.

What’s next?

If this role sounds like a fit — we’d love to hear from you! Just send over your CV and anything else you’d like us to consider.

We’ll review everything within five working days, and if your background matches what we’re looking for, we’ll get in touch to set up a call and get to know each other better.

We are looking for a strong Senior FullStack Developer who can operate at Tech Lead level, not just write code.
This role is about architecture ownership, development process control, and technical leadership in complex e-commerce and SaaS projects.

About Us
We build complex B2B solutions:
 

• 3D configurators
• SaaS platforms
• Magento / Shopware / WooCommerce integrations
• Custom Laravel backends
• React frontends

Projects include non-trivial business logic, integrations, and performance-sensitive systems.

Your Responsibilities:
Architecture & Technical Strategy
 

• Review and audit current architecture
• Identify bottlenecks and technical debt
• Propose improvements and scaling strategy
• Own technical decision-making

Development Process Control
 

• Code reviews
• Validate architecture decisions
• Control estimations and technical solutions
• Ensure delivery quality

Documentation & Systematization
 

• Establish documentation standards
• Control documentation quality
• Extract knowledge currently “in heads” and formalize it

Communication
 

• Technical communication with clients
• Communication with third-party integrations
• Defend technical decisions

Team Leadership
 

• Delegate tasks to junior/middle developers
• Guide and mentor team members
• Maintain engineering discipline
  
   Tech Stack
   
• PHP
• Laravel
• React
• Magento
• Shopware
• WooCommerce
• Deep experience with at least 2 e-commerce platforms is highly preferred.

 Must-Have Experience
 

• 5+ years of commercial development experience
• Proven experience designing system architecture
• Experience working with high-load or scalable systems
• Experience reviewing and refactoring legacy code
• Strong understanding of API design, security, performance
• Experience leading developers (formal or informal leadership)
  
   Soft Skills (Critical)
   
• Strong attention to detail
• Ability to defend technical decisions
• Comfortable with constructive conflict
• Structured thinking
• Ownership mindset

We need someone who is not afraid to challenge decisions and push for better technical outcomes.

 Current State (Transparency)
 

• Backend documentation is currently being formalized (expected soon)
• Some business logic knowledge is not yet fully documented
• Repositories are structured, code is readable, README files exist

We are looking for someone who can bring structure and system thinking into a growing environment.

Interview Process
 

1. HR Interview
2. Technical Interview
3. Deep Technical / Architecture Interview
4. Final Interview

If you are a strong engineer who wants real ownership, architectural influence, and impact — let’s talk.

Tango is a successful, market leader, a live-streaming Platform with 450+ Million registered users, in an industry projected to reach $240 BILLION in the next couple of years. 

The B2C platform, based on the best-quality global video technology, allows millions of talented people around the world to create their own live content, engage with their fans, and monetize their talents.

Tango live stream was founded in 2018 and is powered by 500+ global employees operating in a culture of growth, learning, and success!

The Tango team is a vigorous cocktail of hard workers, creative brains, energizers, geeks, overachievers, athletes, and more. We push the limits to bring our app from “one of the top” to “the leader”. 

The best way to describe Tango's work style is not to use the word “impossible”. We believe that success is a thorny path that runs on sleepless nights, corporate parties, tough releases, and of course our users' smiles (and as we are a LIVE app, we truly get to see our users all around the world smiling right in front of us in real-time!).  
 

Responsibilities

• Design and develop high-load backend microservices.
• Maintain the existing codebase and gradually rewrite it to the new technology stack.
• Optimize code to achieve better performance.
• Work together with the OPS team to address production issues.
   

Requirements

• 8+ years of experience as a Java Developer
• Writing code in a clean and maintainable manner
• Solid experience with Java 17-21
• Experience with MySQL, Kafka, Redis
• Understand microservice architecture patterns
• Good at Spring framework
• Experience with: REST, protobuf
• Hands-on experience with SQL and schema design
• Basic hands-on experience with CI/CD (Gitlab CI)
• Cover code by tests (mockito, wiremock, testcontainers)
• Excellent problem-finding and solving skills
• Good communication skills
• Work in an Agile team
• Intermediate+ English.
   

What we offer:

• Stock options grant (we’re a Silicon Valley Company)
• Competitive salary
• On-site position with 5 days from office (no remote)
• Medical insurance for you and 75% off for your relatives
• Free lunches
• Parking
• Multisport card
• Cheerful team spirit and fun office atmosphere

Our Customer:

A global technology company developing real-time video augmentation and rendering infrastructure for broadcast and streaming environments.
 

Responsibilities:

• Design and implement a native video playback extension that augments HLS streams at runtime across platforms such as Android (ExoPlayer), webOS, Roku, and others;
• Build and maintain a cross-platform rendering layer using OpenGL for real-time video frame processing and compositing;
• Integrate GPU-based overlays and visual transformations directly into the playback pipeline with strict frame-accurate synchronization;
• Develop device-aware architecture to handle platform-specific decoding, rendering surfaces, hardware acceleration constraints, and performance tuning;
• Integrate external SDKs and APIs alongside an internal AR/graphics processing pipeline;
• Optimize rendering performance, memory usage, and latency under real-time streaming constraints;
• Collaborate with QA and Product teams to validate rendering accuracy, synchronization precision, and cross-device stability.
   

Required experience and skills:

• Strong experience with Kotlin;
• Strong hands-on experience with OpenGL (mandatory, core skill), including shader programming and GPU pipeline understanding;
• Solid knowledge of real-time rendering concepts (frame buffers, textures, shaders, synchronization, GPU/CPU interaction);
• Experience integrating OpenGL with native video playback surfaces;
• Practical experience with HLS streaming internals and playback customization;
• Strong understanding of video decoding/rendering pipelines and frame timing control;
• Experience with native video players on at least one of the following platforms: Android (ExoPlayer), webOS, RokuTV;
• Experience implementing low-latency video overlays and graphical composition;
• Understanding of hardware acceleration and performance optimization on embedded/TV devices;
• Proven background in full-cycle software engineering (integration, profiling, debugging, optimization);
• English — Upper-Intermediate+.
   

Working conditions

5-day working week, 8-hour working day;

All UA public holidays are days off;

Vacation and sick leave are covered by the company;

Remote work.

Our Customer:

Our customer is a global, data-driven digital advertising technology company operating at large scale across mobile apps and web platforms.
 

Your Tasks:

• Analyze large, complex datasets to uncover patterns, insights, and business opportunities;
• Design, build, and own scalable, end-to-end data pipelines;
• Develop and productionize advanced machine learning models and algorithms, particularly in monetization-related domains;
• Build and maintain data models for real-time (online) processing;
• Contribute to the creation of new data-driven products and continuously improve existing ones;
• Collaborate with Product, BI, Analytics, DevOps, R&D, and Marketing teams to deliver complete solutions;
• Lead full production releases, including requirements analysis, testing, monitoring, result evaluation, and rapid response to critical issues.
   

Required Experience and Skills:

• 6+ years of experience as a Data Scientist with a strong foundation in machine learning concepts and models;
• Previous experience in the Ad-Tech industry;
• Hands-on experience working on large-scale, high-load systems processing billions of requests per second;
• Hands-on experience with Python including writing production-ready code and working with modern Python frameworks and tooling;
• Experience with data science / ML libraries and models, such as regression and classification models (e.g. XGBoost, LightGBM), recommendation systems, and related ML techniques;
• Solid understanding of databases and SQL for data analysis and retrieval;
• Experience with monitoring and alerting tools such as Grafana and Kibana;
• Proven experience working in real-time / online environments;
• Bachelor’s or Master’s degree in Computer Science, Engineering, Mathematics, Statistics, or a related field;
• Strong end-to-end ownership mindset: ability to take solutions from research and experimentation through implementation and production;
• Fluent English with strong communication and collaboration skills.
   

Would Be a Plus:

• Familiarity with the programmatic advertising ecosystem (DSPs, SSPs, ad exchanges);
• Experience with relational databases (e.g. Vertica, VoltDB) and non-relational databases (e.g. MongoDB);
• Experience working with PMML.

Working conditions

5-day working week, 8-hour working day;

Remote work.