Jobs at Djinni

Description:

We are the creators of a new fintech era!
Our mission is to change this world by making blockchain accessible to everyone in everyday life. WhiteBIT is a global team of over 1,200 professionals united by one mission — to shape the new world order in the Web3 era. Each of our employees is fully engaged in this transformative journey.
We work on our blockchain platform, providing maximum transparency and security for more than 8 million users worldwide. Our breakthrough solutions, incredible speed of adaptation to market challenges, and technological superiority are the strengths that take us beyond ordinary companies. Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT and VISA.


The future of Web3 starts with you: join us as a Junior Talent Manager!

Requirements:

— Experience in preparing and structuring vacancy requirements;
— Understanding of role seniority levels and ability to differentiate between Junior, Middle, and Senior specialists based on responsibilities, skills, and expectations;
— Strong organizational and coordination skills;
— Ability to manage multiple processes simultaneously;
— Good communication skills and stakeholder management;
— Analytical thinking and attention to detail;
— Upper-Intermediate+ English level.

Responsibilities:

Talent Demand & Hiring Process:
— Collect and consolidate data on job openings from hiring managers
— Transfer job opening requests for salary analytics
— Gather and validate budget information for open positions from hiring managers
— Coordinate budget alignment with hiring managers based on salary analytics results
— Facilitate the approval process, ensuring all required approvals are obtained
— Monitor and update the status of job applications throughout the process

Internal Talent Search & Talent Pool:
— Work with the internal Talent Pool to identify relevant candidates for open positions
— Support internal search processes, including collecting applications and initial candidate communication
— Coordinate internal interview processes between candidates and hiring managers

Employee Rotations:
— Support or manage employee rotations within one or two departments
— Identify potential internal opportunities aligned with employee profiles
— Coordinate communication between employees and managers during rotation processes
— Ensure smooth execution of rotations in successful cases
— Maintain and update rotation-related reporting

Would be a plus

— Experience in HR, Talent Management, or Operations
— Experience working with internal mobility or recruitment processes
— Familiarity with HR systems and tools

Language proficiency:

English — (Upper-Intermediate (B2))

Ukrainian — (Native)

Work conditions:

Immerse yourself in Crypto & Web3:
— Master cutting-edge technologies and become an expert in the most innovative industry.

Work with the Fintech of the Future:
— Develop your skills in digital finance and shape the global market.
Take Your Professionalism to the Next Level:
— Gain unique experience and be part of global transformations.
Drive Innovations:
— Influence the industry and contribute to groundbreaking solutions.

Join a Strong Team:
— Collaborate with top experts worldwide and grow alongside the best.

Work-Life Balance & Well-being:
— Modern equipment.
— Comfortable working conditions, and an inspiring environment to help you thrive.
— 24 calendar days of paid leave.
— Additional days off for national holidays.

With us, you’ll dive into the world of unique blockchain technologies, reshape the crypto landscape, and become an innovator in your field. If you’re ready to take on challenges and join our dynamic team, apply now and start a new chapter in your career!
Let’s Build the Future Together!

WhiteBIT offers all candidates an equal opportunity to join the team. All hiring decisions are made without regard to race, national origin, gender identity or sexual orientation, age, religion, disability, medical condition, marital status, familial status, veteran status, or any other legally protected characteristic of an individual.

We’re currently looking for a Product Manager to join the product SaaS team at G-MOS — a product from the Promodo ecosystem.

G-MOS is a SaaS platform that helps businesses scale Google Ads through automation and smart product workflows. We’re looking for a Product Manager with hands-on PPC experience who wants to build next-generation products for performance marketers and e-commerce businesses.

Must-have qualifications:

• 2+ years of experience in Product Management
• Hands-on PPC experience: Google Ads — must; Meta Ads, Amazon Ads, Bol.com Ads — nice to have
• Strong experience in product roadmapping and planning, including defining product vision and aligning it with business goals
• Proven skills in backlog management and prioritization, ensuring clarity, focus, and value-driven delivery
• Hands-on experience across the full product lifecycle, from product discovery and validation to delivery and launch
• Excellent stakeholder communication skills, with the ability to align expectations and collaborate effectively across teams
• English B2+ (spoken & written)
• Strong desire to build next-generation products
• Interest in AI: you regularly test new AI features and tools and understand where they add value

This role is a great match if you:

• Understand how PPC specialists work and think
• Can translate business and user needs into clear product solutions
• Care about usability, scalability, and measurable impact
• You’re comfortable working in a fast-growing, product-driven SaaS team

Key responsibilities:

• Work closely with the development team, marketing, and CEO
• Run customer development (custdev) interviews and gather continuous feedback
• Conduct market and competitive research
• Define and own the product roadmap and backlog
• Write clear product requirements (PRDs, user stories, acceptance criteria)
• Build new features and optimize existing workflows, including AI-powered ones
• Improve the current product UX in collaboration with design and development
• Contribute to and evolve the long-term product development vision

What we offer:

• fully remote setup: Monday-Friday, 9:00/10:00-18:00/19:00 (Kyiv time);
• work with a SaaS product in the active scaling phase, with proven product — market fit and a clear value proposition for customers;
• fast professional growth opportunities;
• close collaboration with a strong, experienced team, where your ideas and initiatives genuinely shape processes;
• timely and transparent compensation;
• paid vacation and sick leave — we support a healthy work—life balance and believe that rest and recovery are just as important as results.

Apply now and join the team!

We are looking for a Senior Full-Stack Software Engineer to join a long-term AI-focused product project for an international client.

This opportunity is ideal for engineers who enjoy building modern cloud-native applications and working with AI-driven systems, LLM integrations, and agentic workflows.

Tech Stack

• TypeScript
• Node.js
• React / Next.js
• Google Cloud Platform (GCP)
• AI/LLM-integrated systems
• Agentic harness / AI agents orchestration

Responsibilities

• Build and scale full-stack applications using TypeScript
• Develop backend services, APIs, and frontend features
• Work with cloud infrastructure and services on Google Cloud
• Contribute to architecture and technical decision-making
• Collaborate with distributed engineering and product teams
• Participate in development of AI-powered workflows and automation systems

Requirements

• Strong commercial experience with TypeScript and Node.js
• Solid full-stack engineering background
• Experience with modern frontend frameworks
• Hands-on experience with cloud platforms, preferably GCP
• Ability to own features end-to-end
• Strong system design and problem-solving skills
• Experience with AI/LLM products is a strong plus
• Startup or product-company experience is nice to have

We create technology you can feel — touch-sensitive, intuitive solutions for retail, HoReCa, and smart spaces. Our products combine hardware, software, and emotions, changing the way people interact with technology.
We are looking for a International Sales Manager to help scale Neuroshop in global markets and build partnerships with forward-thinking companies.

What you will do
Sell our products to B2B customers in Ukraine market
Manage the entire sales cycle — from lead generation to contract signing.
Present our solutions to customers and partners.
Collaborate with product, marketing, and technical support teams.

What is important
2+ years of experience in international sales (SaaS, IoT, Hardware, or Tech Solutions).
Ability to translate complex technologies into understandable business value.
Working with CRM (HubSpot, Pipedrive)
LinkedIn Sales Navigator
Outreach platforms (Apollo)
Ability to create and manage outbound email and LinkedIn campaigns and A/B tests

Understanding of the B2B sales funnel, qualification, and sales frameworks
CRM discipline, creative thinking, communication skills.
Candidate should live in Europe

What we offer
Work with an innovative AI product that is shaping a new era of retail.

Remotely format
Competitive salary + performance-based bonuses.

Neuroshop is a technology you can feel

If you see sales not just as deals, but as a way to create connections between people and technology, we are waiting for you.

At Whitechain, we’re on a mission to revolutionize blockchain, smart contracts, and cryptography. As part of the WhiteBIT ecosystem, we’re building cutting-edge Web3 solutions, from our own EVM blockchain to non-custodial wallets, DeFi platforms, and GameFi experiences.

We’re looking for someone with:

• 3+ years of software development experience
• 1–2+ years in blockchain, Web3, crypto, or DeFi
• Strong Solidity and EVM smart contract experience
• Hands-on experience with tools like Hardhat, Foundry, Ethers.js, Web3.js, Viem, MetaMask, or Remix
• Good understanding of DeFi, smart contract security, gas optimization, and backend blockchain integrations
• English level B2 or higher

Nice to have:

• Experience with L1/L2, bridges, validators, nodes, RPC infrastructure, audits, or Web3 security tools
• Backend experience with Node.js, TypeScript, Go, Rust, Python, or Java
• Open-source Web3 contributions or a public GitHub portfolio

The position is fully remote, with modern equipment, paid leave, growth opportunities, and the chance to work on Whitechain and WhiteBIT ecosystem products.

The Slot Frontend Engineer is the slot-client authority across Whimsy's slot-development engagements. The role builds and maintains the slot-game client codebase from scratch and owns it through integration, launch, and live operations.

Technical Constraints

• Language: TypeScript
• Renderer: PixiJS v8
• Animation: Spine-Pixi v8 (skeletal), GSAP (tweening)
• Build tool: Vite
• HTTP client: Axios
• Architecture: strict 5-layer separation + typed HFSM at gameplay layer
• Platform integration: third-party slot SDK via pluggable BackendAdapter only
• Regulatory model: jurisdiction-aware client behaviour via configuration (no code rewrites per market)
• Version control: Git
• Target platforms: modern mobile browsers (iOS Safari, Android Chrome) + desktop browsers in use
  
  Responsibilities
• Own the slot-client codebase.
• Own the typed HFSM modelling the slot spin lifecycle, including free spins, bonus rounds, and error / recovery transitions.
• Own the offline mocked backend used for development, QA.
• Own jurisdiction-aware compliance UI: a single client able to satisfy the rule set of different markets under audit without per-market code forks.
• Own session recovery and reconnection behaviour for mid-spin, mid-free-spins, and mid-bonus states.
• Own client-side performance budgets and the asset, atlas, and texture-memory strategy.
• Author and maintain frontend technical documentation: layer contract, HFSM state and transition diagrams, asset manifests, jurisdiction-profile schema.
• Actively use and document the use of AI tools (ChatGPT, Gemini, Claude) for scaffolding, refactor proposals, and documentation. Document outcomes alongside prompts so the workflow is reproducible by the team.

Requirements

• Strict layered architecture: Presentation / HFSM / Domain / Network / Platform; cross-layer access is Non-Compliance.
• Typed HFSM for slot lifecycle (idle, bet, spin request, etc.).
• Robust session recovery: correct resume mid-spin, mid-free-spins, mid-bonus without state inconsistency.
• Full externalisation of game data: paytables, reel strips, RTP, jurisdiction profiles, feature flags must be server/config-driven.
• PixiJS v8 slot rendering for mobile/desktop within performance budgets, with no visual artifacts during reels, cascades, or bonus flows.
• Spine-Pixi v8 expertise for skeletal animations (symbols, characters, bonus presenters), including layered states and event hooks.
• GSAP orchestration for complex sequences: spin-stop, win reveal, cascades, jackpots, bonus entries.
• Tunable animation parameters (easing, timing, anticipation, win effects).
• Asset strategy: atlases, texture packing, and memory-optimized loading for mobile draw-call and RAM constraints.
• Server-authoritative model: client never controls outcome, RNG, balance, or probability.
• Jurisdiction rules must be configuration-based, not code changes per market.
• No secrets/keys/SDK credentials in source, fixtures, or Git history.
• Performance targets: 60 FPS mid-tier mobile, 30 FPS minimum on low-end devices.
• Defined bundle-size and cold-load budgets under poor network conditions.
• Profiling expertise for rendering, animation, and runtime bottlenecks.
• Knowledge of GPU/render optimization: atlases, sprite sheets, render textures, instancing, and their trade-offs.
• Network resilience: timeouts, exponential backoff, idempotent retries (BackendAdapter), deterministic behaviour under packet loss, mid-spin disconnect/reconnect.
• Observability: structured client logging with correlation IDs for spin-level backend tracing.

Nice to have

• Experience with regulated slot / iGaming frontend
• Live ops: jackpots, tournaments, campaigns, A/B tests
• Localization: RTL, CJK support
• Remote config + A/B testing for mechanics and UX
• CI/CD pipelines (lint, type-check, tests, build, deploy, environments)
• Strong Git discipline (atomic commits, PR hygiene)
• Technical documentation: layer contracts, HFSM diagrams, runbooks (English)

What We Offer

• Greenfield backend - you design the architecture, choose the stack, own the outcome
• Small focused team: no bureaucracy, direct access to decision-makers
• Fully remote, async-friendly
• Competitive compensation, discussed individually
• A product that ships - not an endless pre-production

Integration Engineer (Data & Systems)

Location: Ukraine (remote, US-based company)

About the Role

We’re looking for a strong Integration Engineer / Data Architect hybrid who will own and scale our internal systems ecosystem.

This role sits at the intersection of engineering, data, and business operations. You will design and maintain integrations between our core platforms, ensure data consistency across systems, and build a reliable analytics foundation for decision-making.

If you enjoy connecting systems, automating workflows, and turning messy data into structured insights — this role is for you.

What You’ll DoSystems Integration & Automation

• Design and maintain integrations between HubSpot, Kantata (ERP), ClickUp, Rippling, Slack
• Automate key business workflows (e.g., deal → project → workspace lifecycle)
• Ensure reliable and scalable data synchronization across systems

API & Backend Engineering

• Build custom integrations using Python / Node.js
• Work with REST APIs, webhooks, OAuth
• Handle real-world API challenges: rate limits, retries, async flows
• Deploy solutions in serverless environments (AWS Lambda / GCP)

iPaaS & Workflow Orchestration

• Use tools like Azure Logic Apps / Workato / Celigo
• Decide when to use no-code vs custom solutions
• Build scalable and maintainable integration architecture

Data Modeling & Analytics (Power BI)

• Own the enterprise data model
• Build and maintain Power BI dashboards
• Define key metrics: utilization, margin, backlog, ROI
• Ensure a single source of truth across the company

Reliability & Monitoring

• Implement monitoring, alerting, and failure recovery
• Build self-healing integrations
• Ensure no data loss across pipelines

What This Role Is NOT

• Not IT support / not IAM / not device management
• Not defining business rules — you implement them technically

Requirements

• 4–7+ years in integration / backend / BI / data engineering
• Strong experience with:
  • Power BI (DAX, data modeling)
  • SQL
  • APIs (REST, webhooks, OAuth)
• Experience with Python or Node.js
• Experience with iPaaS tools (Workato, Celigo, Boomi, Azure Logic Apps)
• Ability to communicate with non-technical stakeholders
• Fluency in English (B1-B2 level)

Nice to Have

• Experience with HubSpot / Kantata / Rippling / ClickUp
• Experience in AEC / professional services companies
• Background in finance-related data modeling

What Success Looks Like (First 6 Months)

• Core integrations are live and stable
• HubSpot → ERP automation fully working
• Data pipelines are reliable and monitored
• Power BI becomes the single source of truth

What we offer:

• A modern office with a strong focus on your comfort, along with high-quality hardware and software
• Medical insurance and paid vacation
• Free access to conferences, forums, and courses for professional development
• Team buildings and corporate events
• Compensation for sports activities and English learning
• And many other benefits!

Our main value is people, which is why we create an environment that encourages personal growth, freedom and responsibility, trust, and support in bringing your ideas to life.

Are you passionate about creating sleek, high-performance web applications?

We are looking for a Middle Front End Developer with expertise in React and Next.js to join our team.

At Sigma Software, we build cutting-edge solutions for global customers, combining innovation with high-quality delivery. Joining us means working alongside talented professionals, contributing to impactful projects, and enhancing your skills in a supportive environment.

Why join us? You’ll work with modern technologies, enjoy flexible work arrangements, and be part of a company that values both professional growth and work-life balance.

Responsibilities:

• Develop, maintain, and enhance frontend applications using React and Next.js
• Collaborate closely with UI/UX designers, backend developers, and product managers to deliver high-quality features
• Write clean, scalable, and maintainable code following best practices
• Participate in code reviews and provide constructive feedback
• Optimize application performance and ensure responsive design across devices

• Contribute to the continuous improvement of development processes and tools

   

Requirements:

• 3+ years of commercial experience in frontend development
• Strong proficiency in JavaScript (ES6+)
• Solid hands-on experience with React and Next.js
• Experience integrating REST APIs into frontend applications
• Understanding of state management libraries (Redux, Context API, etc.)
• Strong knowledge of HTML5 and CSS3, including responsive design principles

• Upper-Intermediate level of spoken and written English

   

Will be a plus:

• Experience with TypeScript
• Familiarity with testing frameworks (Jest, Playwright, etc.)
• Knowledge of performance optimization techniques for frontend applications

• Understanding of backend basics (Node.js is a plus)

   

Personal profile:

• Proactive and detail-oriented approach to development
• Passion for creating intuitive, user-friendly interfaces
• Comfortable working in cross-functional teams
• Ability to adapt quickly to new technologies and requirements
   

Ти захоплюєшся створенням стильних, високопродуктивних вебзастосунків?

Ми шукаємо Middle Front End Developer з експертизою в React та Next.js, щоб приєднатися до нашої команди.

У Sigma Software ми створюємо інноваційні рішення для глобальних клієнтів, поєднуючи креативність та високу якість виконання. Приєднавшись до нас, ти працюватимеш поруч із талановитими професіоналами, робитимеш внесок у значущі проєкти та розвиватимеш свої навички в дружньому та підтримуючому середовищі.

Чому варто приєднатися до нас?
Ти працюватимеш із сучасними технологіями, матимеш гнучкий графік та станеш частиною компанії, яка цінує як професійний розвиток, так і баланс між роботою та особистим життям.

Обов’язки:

• Розробка, підтримка та вдосконалення frontend-застосунків з використанням React та Next.js
• Тісна співпраця з UI/UX дизайнерами, backend-розробниками та продакт-менеджерами для створення якісних функцій
• Написання чистого, масштабованого та підтримуваного коду відповідно до найкращих практик
• Участь у code review та надання конструктивного зворотного зв’язку
• Оптимізація продуктивності застосунків та забезпечення адаптивного дизайну на різних пристроях

• Внесок у постійне вдосконалення процесів розробки та інструментів

   

Вимоги:

• 3+ років комерційного досвіду у frontend-розробці
• Впевнене володіння JavaScript (ES6+)
• Досвід роботи з React та Next.js
• Досвід інтеграції REST API у frontend-застосунки
• Розуміння бібліотек для керування станом (Redux, Context API тощо)
• Глибокі знання HTML5 та CSS3, включно з принципами адаптивного дизайну

• Рівень англійської — Upper-Intermediate (усна та письмова)

   

Буде плюсом:

• Досвід роботи з TypeScript
• Знання тестових фреймворків (Jest, Playwright тощо)
• Розуміння технік оптимізації продуктивності frontend-застосунків

• Базові знання backend (Node.js буде перевагою)

   

Особистий профіль:

• Проактивний та уважний до деталей підхід до розробки
• Пристрасть до створення інтуїтивних та зручних інтерфейсів
• Комфортна робота в кросфункціональних командах
• Здатність швидко адаптуватися до нових технологій та вимог

✉️ Senior Frontend Engineer (AI-first role) | Remote (Europe) | B2B only

We are currently hiring a Senior Frontend Engineer for a trading / fintech product company working on a high-traffic, production-grade marketing platform serving multiple global locales.

This is a fully remote, Europe-based, B2B contract role only.

🚀 About the role

You will take full ownership of a mature frontend ecosystem built with:

Next.js (App Router), React 19, TypeScript, headless WordPress, and a custom Gutenberg block rendering engine.

The platform supports 30+ locales, real-time market data, and multiple third-party integrations across marketing, CRM, analytics, and personalization tools.

This is a high-responsibility engineering role, not greenfield — you will improve, scale, and optimize an existing architecture used at global traffic level.

🤖 AI-first engineering (core requirement)

This role is designed around AI-native development workflows.

You must be experienced in:

Agentic IDEs (Cursor, Claude Code, Windsurf or similar)
AI-driven multi-file refactoring and feature scaffolding
Context engineering (CLAUDE.md / AGENTS.md / rules for large codebases)
AI-assisted component generation (including Gutenberg block → React mapping)
AI-supported testing (Vitest + RTL with human-level validation)
Ability to detect and reject incorrect or hallucinated AI outputs

👉 Candidates who do not actively use AI as a core part of their workflow will not be considered.

🧩 Key responsibilities
Own frontend architecture, performance, and scalability
Work with headless WordPress + Gutenberg block system
Build multi-locale routing (next-intl, domain-based structure)
Integrate real-time market data via WebSockets / SignalR
Manage third-party integrations (GTM, CRM, analytics, personalization tools)
Ensure Core Web Vitals, SEO, and performance optimization
Work with CI/CD pipelines (Azure DevOps, Docker, AWS ECR)
Maintain design system consistency (Figma → code, tokens, Tailwind)
Write and maintain tests (Vitest, Testing Library)
🧠 Must have
5+ years frontend experience
Strong Next.js (App Router, SSR, ISR, RSC)
Advanced TypeScript in large-scale projects
Experience with headless WordPress + REST API
Multi-locale / i18n architecture experience
SWR for data fetching
WebSockets / real-time data handling
Strong understanding of SEO + Core Web Vitals
Experience working with design systems (no ad-hoc styling)
🌍 Location & contract
Europe-based candidates only
Fully remote
B2B contract only
📩 Apply / contact

About us

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/

About the role

At RubyLabs, we’re seeking a senior AI Engineer (Node.js / Next.js / TypeScript) to shape our AI infrastructure and drive production-ready LLM experiences. You’ll work in a modern stack, making data-driven decisions around model performance, reliability, and cost.

You’ll own advanced prompt systems, structured outputs, and complex LLM workflows using LangChain or LlamaIndex. Observability, debugging, and evaluation are core to the role, leveraging Langfuse and AI gateways like OpenRouter to continuously improve model quality and operational efficiency. You’ll take full ownership of key AI features from experimentation to live production.

Key Responsibilities

• Advanced Prompt Engineering: Designing complex, dynamic prompt templates with conditional logic and efficiently reusing information and context within prompts to maximize generation quality and reasoning.
• Structured Outputs & Schemas: Implementing various response schemes (JSON mode, function calling, Zod/JSON schemas) to ensure AI outputs are predictable and ready for seamless integration into application logic.
• Prompt Engineering & Evaluations: Building robust evaluation pipelines and using Langfuse to collect feedback and score the quality of responses in real time.
• Tracing & Debugging: Performing deep debugging of complex LLM chains using Langfuse traces to identify bottlenecks and optimize for cost, latency, and context window usage.
• AI A/B Testing: Running systematic experiments across different models via OpenRouter (e.g., comparing Claude 3.5 Sonnet vs. GPT-4o) and analyzing results based on quantitative metrics.
• Data-Driven Decisions: Making deployment decisions for new prompts or models strictly based on quantitative benchmarks and trace data, rather than intuition.
• Output Scoring & Analysis: Developing scoring systems to analyze the “Problem → Solution” chain and identify root causes of hallucinations or logic errors using Langfuse analytics.
• Model Performance & Fine-Tuning: Regularly re-evaluating model performance as new architectures emerge and performing fine-tuning when necessary to meet specific domain requirements.

Qualifications

• Node.js & Next.js: Deep knowledge of the stack to build reliable services and handle complex LLM-generated data.
• Dynamic Prompting Skills: Proven experience in building prompts where content is highly dependent on input variables and context injection.
• OpenRouter Experience: Experience working with unified APIs, managing rate limits, and selecting the most cost-effective models for specific tasks.
• Langfuse (or similar): Understanding of LLM observability principles — setting up tracing, creating test datasets, and integrating scoring systems.
• Evaluation Methodology: Experience with frameworks like RAGAS or building custom “LLM-as-a-judge” systems.
• Analytical Mindset: Ability to transform raw generation logs into actionable business metrics and technical insights.
• Iterative Mindset: Focus on continuous product improvement through constant feedback loops.

Nice to have

• Fine-Tuning: Practical experience in fine-tuning models for specific domain tasks or JSON compliance.
• RAG Architecture: Understanding how to build and optimize Retrieval-Augmented Generation systems, including indexing, retrieval, and re-ranking.
• Python: Basic knowledge for working with data science scripts or AI evaluation libraries.

Location

Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Benefits

Discover the perks of being part of our vibrant team! We offer:

• Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
• Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
• Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
• Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1nkrN76JlZkbKj9WSOhlT1_mni_CZeDkHdwfIjPXVwvk/preview?tab=t.0#heading=h.ndsdl4wapxtt

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

Interview Process

After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

• Recruiter Screening (40 minutes)
• Technical Interview (60 minutes)
• Final Interview (30 minutes)

Life at Ruby Labs

At Ruby Labs, we move fast, aim high, and expect the same from our team. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.

Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

Main requirements

• 5+ years of experience working with Adroid/Kotlin
• Jetpack Media3 and ExoPlayer expertise for at least 1 year
• Audio Streaming experience on Android for at least 1 year

Requirements

Position name: Senior Android/Kotlin Developer
Level: Senior
Hard skills requirements (including years):

• Jetpack Media3 and ExoPlayer expertise
• Audio streaming via Media3 (remote URL handling)
• MediaSessionService implementation for background tasks
• Audio Focus management (AudioFocusRequest)
• Foreground Service configuration (mediaPlayback type)
• MediaStyle notification integration
• System Media Controls and Lock Screen integration
• Kotlin Coroutines and Flow for async API calls
• SimpleCache implementation for audio persistence
• LoadControl and buffering optimization
• Pre-fetching and lookahead caching logic
• AudioDeviceCallback and "becoming noisy" broadcast handling
• Android Keystore for secure credential storage
• Scoped Storage and Privacy Sandbox compliance
  
  Soft skills requirements:
  - Good communication skills
  - Proactive
  
  Office/Remote: Remote
  Project tasks:
  Implement an audio player component that fetches and plays a remote audio file via the API. Ensure the implementation handles loading states and basic playback controls within the existing UI.
  
  English level: Upper-Intermediate (B2+)

Simplify
Keep energy for life.

The daily quantum leap of technology development requires people to continually upgrade their skills to manage more complicated programs and devices. It consumes time and energy.

We work for simplifying the digital experience of people by making a wide range of functionally excellent IT products that are still intuitively usable. From the landing page for the one-time event up to the total automation of the business.

We work diligently and adequately because we value our and your time and energy.

If you share our principles — we will be pleased to work with You.

Looking for a Senior level Full-stack and Front-end developers experienced in the healthcare domain locally in the US.

Full-stack : Python+React.js or Node.js+React.js
Front-end : React.js or Angular

Location: USA

Longterm project

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)

About Us

We’re building a mental wellness app designed to deliver personalised, accessible, and impactful support to users worldwide. Our mobile app is already live and growing fast, and we’re now looking for a talented Backend Developer to join our team and help take the product to the next level.

The Role

You'll own and evolve the server-side logic that powers our apps — designing and shipping APIs consumed by mobile and web clients, strengthening our microservices ecosystem, and helping us scale reliably and securely. You'll work closely with frontend and mobile engineers, DevOps, and product.

Key Responsibilities
 API & Auth
 

• Design and maintain RESTful APIs for iOS, Android, and web
• Build high-throughput async endpoints
• Implement JWT auth flows and OAuth 2.0 social login (Apple, Google)

Microservices & Architecture
 

• Develop and maintain core services: User, Content, Tracking, Analytics, Notification
• Design stateless, fault-tolerant services for horizontal scaling
• Contribute to Golang services for high-concurrency analytics and notification dispatch

Database & Caching
 

• Write optimized PostgreSQL queries; design schema migrations indexes
• Implement time-based table partitioning for analytics and journal data
• Configure PgBouncer pooling, read/write splitting, and materialized views
• Build and invalidate multi-layer Redis caches (sessions, content metadata, preferences)

Integrations
 

• Apple HealthKit (sleep, HRV, mindful minutes, activity sync)
• In-app purchases: App Store API and Google Play Billing verification
• Push notifications via Firebase Cloud Messaging (iOS & Android)
• Stripe for web subscription payments; Amazon Polly for TTS in meditations

Security & GDPR
 

• GDPR features: data export (JSON), 30-day automated deletion, consent management
• AES-256-GCM encryption for sensitive mental health data fields
• Enforce TLS 1.3, HSTS, Perfect Forward Secrecy; contribute to RBAC and audit logging

DevOps & Quality
 • Maintain Dockerfiles and multi-stage build configs; participate in GitLab CI/CD pipeline
 • Support blue-green deployments and canary rollouts (10% traffic routing)
 • Write unit, integration, and contract tests using pytest

Requirements
Must Have
 • 5+ years backend development in Python
 • Confident working with the Flask and FastAPI frameworks.
 • Experience with Golang, JavaScript, and HTML.
 • VPS management skills on AWS: initial setup, application deployment, performance optimization, updates, security, and monitoring.
 • Experience working with Elasticsearch.
 • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
 • Redis for caching, session management, and rate limiting
 • JWT authentication, OAuth 2.0, and security best practices
 • Experience with pytest and contributing to CI/CD pipelines
 • Comfortable working in a Docker-based microservices environment
 • Knowledge of GDPR requirements and privacy-by-design practices
 • Proficiency with Git and collaborative workflows (GitFlow)