Jobs at Djinni

At Lendurai, we enable unmanned aerial vehicles (UAVs) to operate independently of global navigation satellite systems and radio control, using computer vision and machine learning. We partner with multiple UAV manufacturers to deliver cost-effective capabilities to public sector and defence customers. Our team has deep experience in aerospace engineering, defence tech, and autonomous systems, with backgrounds at companies like Bolt (EE), Open Cosmos (UK), and Starship Technologies (EE).

As a control-systems engineer you will own the algorithms that keep our drones stable, responsive, and mission-capable without satellite guidance.

What you will be doing

• Design, implement, and tune real-time flight-control algorithms (attitude, position, and trajectory loops) targeted at GNSS-denied missions.
• Develop high-rate state-estimation and sensor-fusion pipelines that blend IMU, barometer, optical flow, VIO, and SLAM data.
• Port and optimise these pipelines on flight computers (Jetson Orin, Raspberry Pi CM5, i.MX 8M plus) under real-time constraints.
• Extend and customise PX4 or write bare-metal control stacks where needed.
• Create Software-in-the-Loop (SITL) and Hardware-in-the-Loop (HITL) test environments; iterate rapidly between simulations and field flights.

• Instrument test vehicles, run flight campaigns, and mine logs to improve robustness in wind, vibration, and electromagnetic interference.

   

We are looking for

Required skills:

• Proficiency in C++14 and C99 (or newer).
• Proficiency in Linux environments.
• Hands-on experience with Linux SBCs such as Raspberry Pi, BeagleBone, or similar.

Nice to have:

• Previous experience with embedded systems, especially STM32 microcontrollers.
• Hands-on experience with PX4, ArduPilot, or custom flight-control firmware.
• Practical knowledge of RTK-GPS, UWB, or vision-based localization frameworks.

Additional skills that are advantageous

• Control theory — PID, LQR, observers, pole/zero placement, robustness analysis.
• Sensor fusion & estimation — Kalman variants, factor graphs, Bayesian filtering.
• Computer vision — feature tracking, optical flow, homography, depth estimation.
• Digital comms & electronics — UART, SPI, I²C, CAN-FD, logic-analyzer debugging.

What we offer

• Monthly gross salary €3,500-6,000 based on experience and impact
• Stock options
• A mission-driven team that values ownership, curiosity, and a hands-on approach to solving defense challenges
• Early technical influence in a growing defense tech startup
• A focus on outcomes

Join Lendurai to be part of the forefront of defence technology innovation.

A fast-growing SaaS company, which is transforming the way tax, accounting, and audit firms operate, is looking for a Staff Backend Engineer (Python) to work remotely.

Founded in 2017, the company now has over 350 professionals. It is trusted by 10,000+ firms in 25+ countries. The all-in-one platform helps firms manage documents, payments, workflows, and communication more efficiently.

You will be responsible for the full cycle of launching a new direction, which includes:

• Selection and technical justification of the main Python framework
• Development, launch, and commissioning of the first services on Python
• Creation and documentation of development standards and processes for the Python stack
• Building CI/CD processes in close collaboration with the DevOps team
• Leading and implementing major technical initiatives (epics)
• Participating in the hiring, onboarding, and mentoring of future Python team members
• Active communication with business representatives

What the company offers: 30 days of vacation, paid sick leaves, training and development budget.

Requirements: experience working with Python, microservices, and AWS, experience making architectural and technical decisions.

Project Manager (Client Service, German market)

Matbor is a Germany-based digital marketing company operating across the European market.
We help Ukrainian local businesses attract hundreds of customers every month through digital marketing.

Over the past year, we have grown 5×, expanded our team to 20+ specialists, and continue to scale rapidly.

We are looking for an experienced Project Manager with agency background and German language proficiency who will become the main point of contact for our clients and ensure high service quality and long-term client loyalty.

Responsibilities

• Communicate with clients via chats and Zoom calls
• Collect client requests and translate them into clear tasks for product and marketing leads
• Coordinate work with internal product and production teams
• Control deadlines and task execution across projects
• Conduct monthly Zoom meetings with clients to present progress and results
• Ensure transparent communication, structured updates, and client satisfaction

Requirements

• German language proficiency — B2+ (spoken and written)
• Proven experience as a Project Manager in a marketing or digital agency
• Solid understanding of digital marketing tools and channels
• Experience working with task management tools and spreadsheets
• Strong communication, organizational, and coordination skills
• High level of responsibility, attention to detail, and structured thinking
• Ambition and willingness to grow professionally together with the company

Work Schedule

• Monday–Friday: 9:00–18:00 CET
• Saturday: client messages until 18:00 CET (no project work)
• Sunday: day off

Compensation

• First month (trial period): $1,500
• After trial: $1,500 base + performance bonus
  (total $2,000–2,200 depending on results)

About the company and the role

At Lendurai, we enable unmanned aerial vehicles (UAVs) to operate independently of global navigation satellite systems and radio control, using computer vision and machine learning. We partner with multiple UAV manufacturers to deliver cost effective capabilities to public sector and defence customers. Our core team has substantial experience in aerospace engineering and developing computer vision applications across Europe, including at companies like Bolt (EE), Open Cosmos (UK), and Starship Technologies (EE).

As software engineer for camera systems you will optimize EO/IR video for operators (ultra-low-latency, stable, and clear in the field) and tune the camera/ISP pipeline so computer vision applications stay robust and accurate.

What you will be doing

• System Architecture & Latency Control: Define the complete imaging pipeline architecture, from sensor to data output. Drive component selection and systems design to achieve a low end-to-end latency video pipeline, essential for direct First-Person View (FPV) operator control.
• Image Quality Ownership: Hold direct responsibility for the final image and video quality across autonomous and human operator flight modes. This includes selecting camera modules, defining ISP parameters, and tuning algorithms (e.g., exposure, color, sharpness, noise reduction) to provide the optimal visual experience for the human operator and autonomous control under varying light conditions.
• Sensor Integration: Select, integrate, and validate cameras (electro-optical, infra-red, etc.) into the drone platform. Manage the data paths to optimize for dual-use: minimal-latency streaming for operators and high quality data for autonomy.
• Driver & Firmware Optimization: Develop, debug, and optimize low-level firmware and embedded drivers (C/C++) that interface the camera hardware with the onboard computer. Focus tuning efforts on optimizing the camera output to balance low-latency and high fidelity.
• Environmental Hardening: Work with electronics and mechanical engineers on thermal management, vibration dampening, and EMI/RFI shielding to ensure system stability and image quality are maintained under demanding operating conditions.
• Autonomy Support: Collaborate across functions to provide reliable, stable, and geometrically calibrated camera data for computer vision applications like SLAM and object detection.

• Testing and Validation: Take part in rigorous ground and flight testing, utilizing specialized tools to measure end-to-end latency, throughput, and objective/subjective image quality metrics.

   

We are looking for

Required skills:

• Experience in camera systems design, development, and integration, with experience in embedded or robotics platforms.
• Demonstrated expertise in image quality tuning and calibration, including detailed knowledge of the ISP pipeline and image sensor operation.
• Strong proficiency in C/C++ low-level driver development.
• Proven experience in defining system architectures for ultra-low latency applications (e.g., real-time video streaming or gaming).
• Solid understanding of imaging interfaces (e.g., MIPI CSI-2) and embedded communication protocols relevant to UAVs.

Additional skills that are nice to have:

• Experience with libcamera or similar
• Direct experience with (digital) FPV or broadcast video systems
• Experience with flight control stacks (PX4/ArduPilot) and companion computer integration (NVIDIA Jetson, IMX8/9, Raspberry Pi etc).

• Knowledge of computer vision requirements (e.g., camera calibration models).

   

What we offer

• Monthly gross salary €3,500-6,000 based on experience and impact
• Stock options
• Ability to influence major technical decisions as an early hire
• A focus on outcomes

Join Lendurai to be part of the forefront of defence technology innovation.

AMLBot is an international company providing AML, KYC, and KYT compliance solutions for the crypto industry. We develop tools that help crypto businesses assess risk, investigate suspicious activity, and protect users and assets across CeFi and DeFi ecosystems.

Our solutions are used by thousands of crypto companies worldwide, including exchanges, OTC desks, and Web3 projects, serving hundreds of thousands of users globally.

We are looking for a Customer Support Manager who will work at the intersection of customer support, product guidance, and conversion.

Mission:

Convert incoming client requests into paid customers, retain revenue, and grow accounts through upsell and cross-sell.

The focus is on quality communication, understanding client use cases, and building long-term relationships.

What you get

• 100% remote work, flexible schedule

• Fixed salary + % commission from sales (payments in USDT)

• 20 paid vacation days + paid sick leave

• Clear growth trajectory: Customer Success → Head of Support

• Direct impact on revenue and product decisions

• Fast-paced crypto team with real decision-making authority

What we expect from you

• 1+ year experience in crypto / fintech / blockchain SaaS

• Clear understanding of how crypto products are sold, not just supported

• Practical experience with AML / KYC / KYT systems

• English: Upper-Intermediate+ (you can sell and negotiate, not just reply), Ukrainian: Fluent

• Strong persuasion, objection handling, and closing skills

• Ownership mindset: you are responsible for conversion, retention, and client satisfaction

• High self-discipline and ability to work without micromanagement

• CV with photo + links to professional social profiles (LinkedIn preferred)

Your responsibilities

• Handle incoming leads and client requests via chat

• Qualify prospects, identify needs, and convert conversations into paid deals

• Sell company services through upsell / cross-sell during active client communication

• Process orders, subscriptions, and payments in internal systems

• Support clients on AML / KYC-related use cases and product logic

• Retain customers by proactively working with churn risks

• Share insights from client conversations to improve sales scripts and product positioning

If you’ve considered this position and are sure you want to develop with us, send us your CV.

If you do not hear from us within 5 business days, it likely means that we have decided to move forward with other candidates whose profiles more closely match our current requirements.

The Role

We are looking for an Application Security Engineer to be a core technical pillar of our new Application Security team. This is a hands-on technical leadership role without people management responsibilities.

You will be the go-to person for security architecture, secure coding practices, and vulnerability management.

Your primary mission is to ensure the integrity of our core platforms—the Exchange and GRX Pay—by building automated security systems and defining the standards that protect our users' assets. You will analyze the existing infrastructure to understand its strengths and weaknesses, developing a clear strategy to harden and evolve it.

While this is a remote-first role, you should be based in a CET-adjacent timezone to collaborate effectively with colleagues. You can also expect to travel for periodic in-person team gatherings.

What You’ll Do

• Architect Secure Systems: Design, build, and maintain the security frameworks for our web and mobile applications, ensuring security is baked into the platform from the start.
• Audit and Hardening: Analyze the existing codebase and infrastructure to identify vulnerabilities. Develop and execute a strategy for incrementally refactoring legacy features into the new, secure platform.
• Secure the Exchange: Profile and optimize our applications to ensure a reliable and secure experience for the data-intensive Golden Ratio Exchange.
• Set the Standard: Define and enforce best practices for code quality, security testing, and automated vulnerability scanning (e.g., SAST, DAST) across all codebases.
• Technical Leadership: Act as the primary technical mentor for other engineers regarding secure development life cycles (SDLC). Solve the most complex challenges related to cryptography and data protection.
• Collaborate: Work closely with the Security Manager and Product teams to translate business needs into scalable, secure technical solutions.

What We’re Looking For

• Experience: 3+ years of professional experience in application security or software engineering with a heavy focus on security.
• Legacy Systems Experience: Demonstrable experience working with and securing large, existing codebases. You see complex legacy code as a challenge to be solved, not avoided.
• Technical Expertise: Expert-level knowledge of web and mobile security vulnerabilities (OWASP Top 10) and deep familiarity with TypeScript or React environments.
• Security Mindset: Experience building or maintaining shared security libraries or automated security tooling. You enjoy building tools that make other developers more productive and secure.
• Quality Focus: A deep commitment to code quality, automated testing, and integrating security into CI/CD pipelines.
• Location: Based in a timezone adjacent to Central European Time (CET) for optimal team collaboration.
• Communication: Excellent skills in articulating complex technical security concepts clearly to both technical and non-technical stakeholders.

What We Offer

• High-Impact Role: A unique opportunity to be a founding technical expert for application security, making key architectural decisions.
• Clear Ambition: The chance to join a company with a clear goal of becoming the #1 crypto platform in the EU.
• Greenfield Culture, Brownfield Code: A rare chance to join a new company culture with no baggage, while solving the interesting technical challenges of a mature product.
• Flexibility & Connection: A 100% remote-first role with periodic, all-expenses-paid team gatherings and a new hub in Ticino, Switzerland.

The Role

This is a foundational leadership role, reporting directly to the CTO. We are looking for a hybrid leader to build and manage our Tenants team, which is responsible for the most critical component of our platform: Identity & Access Management.

Our management philosophy is unique. The Manager is the single owner of a business vertical, responsible for the Why (the product vision), the What (the features and roadmap), and the Who (the people management and hiring).

You will act as both the Product Manager and the Engineering Manager for all user and company identity services. You will be a highly technical leader, but your primary focus will be on product strategy and team execution, not on being the deepest technical expert. You will partner with a dedicated Senior Engineer (who will own the deep how—the technical architecture) to bring your product vision to life.

Your mission is to define the future of our identity platform, build your team, and lead the technical migration from our legacy codebase to a modern, secure, and MiCA-compliant architecture.

This is a full-time, remote leadership role.

What You'll Do

• Product Ownership (The "Why" & "What"):
  • Define and own the complete product vision, strategy, and roadmap for all identity and access management services.
  • Own the product backlog and prioritize all features related to:
    • User Management: Registration, KYC verification, authentication, 2-factor auth, password reset, session management, and user-level API keys.
    • Company Management: Company creation, KYB verification, member management, and company-level API keys.
    • Notifications: The core service for managing and delivering user notifications.
• People & Team Leadership (The "Who"):
  • Build Your Team: You will have the mandate to hire and build your team of full-stack engineers.
  • People Management: Lead, mentor, and grow your engineers through 1-on-1s, goal setting, and career development.
  • Define Culture: Establish a world-class engineering culture focused on security, reliability, and precision.
• Engineering Execution (The "How"):
  • Lead the planning and execution of the strategy for all identity-related systems.
  • In partnership with your Senior Engineer, guide the team in making high-level technical decisions for security and scalability.
  • Ensure your team delivers high-quality, secure, and reliable services using our stack (Node.js, Nest.js, React, PostgreSQL).
  • Collaborate with all other Managers to provide secure, seamless, and reliable identity services that the entire platform depends on.

What We're Looking For

• Hybrid Experience: 5+ years in software engineering with 2+ years in a leadership role (e.g., Engineering Manager, Team Lead, or a technical Product Manager).
• Domain Expertise: Direct, hands-on experience building and leading teams that manage identity, authentication (e.g., OAuth, JWT), or KYC/KYB systems is a huge advantage.
• Highly Technical: You must come from a strong engineering background (ideally with Node.js or similar) and be able to lead technical discussions on security, authentication, and database design.
• Product Mindset: You must have experience with product management fundamentals: creating roadmaps, managing backlogs, and making data-driven priority calls.
• People Leader: Demonstrable experience hiring, managing, and mentoring engineers.
• Legacy Systems Experience: You are not afraid of a brownfield project. You have experience planning and executing the migration of a critical legacy system.
• Communication: Excellent ability to articulate the "Why" to your team and report progress to the CTO.

What We Offer

• Foundational Leadership Role: A rare opportunity to build the most critical team (identity and security) from scratch, reporting directly to the CTO.
• Full Ownership: Complete autonomy over your product vertical (Why, What, Who).
• Clear Ambition: The chance to join a company with a clear goal of becoming the #1 crypto platform in the EU.
• Greenfield Culture, Brownfield Code: A rare chance to join a new company culture with no baggage, while solving the interesting technical challenges of a mature product.

📍 Location: Europe
💼 Cooperation type: Full-time
🧭 Work format: Remote

We’re seeking a Technical Support Specialist to support clients using our server-side tracking solutions. You’ll ensure high-quality customer support for thousands of users worldwide.

About us:
Stape is a global product-driven IT company and the #1 leader in the server-side tracking market. We’re building a powerful, technically complex product that simplifies server-side tracking for marketers and website owners. Our platform processes over 15 billion requests daily, helping improve tracking accuracy and data privacy for more than 200, 000 clients worldwide. We work closely with top partners, including Meta, Tiktok and Snapchat, to provide advanced tracking capabilities. 

We actively participate in industry-specific conferences as sponsors of events like MeasureCamp and Superweek.

Key tasks:

• Provide prompt and helpful support to clients via email and chat (no phone calls)
• Keep Help Center / Knowledge Base articles accurate and up to date
• Aim to resolve support tickets in one touch whenever possible
• Actively collaborate with team members to share insights and improve support processes

Your background:

• Understanding of network troubleshooting tools and techniques (e.g., browser DevTools)
• Ability to learn quickly and independently grasp new technical concepts
• Strong communication skills, including the ability to explain technical topics clearly and collaborate effectively with cross-functional teams
• Ability to analyze data, identify tracking issues, and find solutions
• Ability to work in a small team / startup environment
• English skills (Intermediate strong or higher)

Will be a plus:

• Previous experience in technical support or a similar client-facing technical role
• Understanding of Google Tag Manager (GTM), Google Analytics, Facebook Ads, and Google Ads
• Familiarity with Jira and Confluence or similar project/documentation tools

We offer:

• Industry Leader: Make a meaningful contribution to a globally recognized solution that shapes the future of the server-side tracking market.
• Flexibility: Enjoy a flexible work schedule with the freedom to choose where you work.
• Extended remote workspace setup: Experience the benefits of a fully equipped remote workspace, designed to elevate your productivity and create a comfortable work atmosphere.
• Collaborative culture: Engage in a friendly and open team environment that encourages initiative, creativity, and collaboration.
• Educational support: Invest in your self-development through a dedicated training and professional growth budget.
• Well-Being: Take advantage of 30 days of paid time off (20 standard days + 10 more to cover public holidays), Parental Leave, Anniversary days off, and Study Leave to support your recharge and maintain a balance between work and personal life.
• Health support: Feel secure with full coverage for Sick Leave and a dedicated medical insurance budget that prioritizes your health.

Excited to join us? Submit your CV and let’s get started!

Our client’s company operates in the e-commerce sector, enabling connections between large retailers and small shops through their B2B marketplace. They have already built a marketplace and want to rewrite it using up-to-date e-commerce technologies, so this product would be easier to scale and maintain for the next decade. The client operates in the USA.

We are currently in the final stage of MVP for the new B2B marketplace based on WordPress/WooCommerce/Dokan. The plan is to finish a new B2B marketplace, implement a few new features (Search, Shopify integration, internal tools), migrate data, and roll out in the next 3 months.

Stack of the project

PHP 8.3, WordPress, WooCommerce, Dokan, MySQL/PostgreSQL, AWS (EC2, S3, RDS, Cloudfront, etc.), JS, jQuery, CSS, HTML.

Responsibilities

Participate in all development and DevOps processes from the beginning till roll-out.

Requirements

We are looking for a Strong Middle/Senior specialist who worked with AWS, WP, WooCommerce, Search, and Shopify integrations, and has experience with:

• PHP - 5+ years
• WordPress - 5+ years
• JS, jQuery - 5 years
• Woocommerce - 3+ years
• Search integration (Elasticsearch, Algolia)
• Intermediate English speaking level
• Fluent Ukrainian speaking level

Would be a plus

• Dokan (or other B2B WordPress Plugins)
• Shopify Integration
• AWS

Team setup & processes

• Project Manager
• 2 Senior WordPress Developer - open position
• 1 QA

We’re following 2-week Sprints with Story Point estimates, refinements, planning, demos, and retrospectives.

Interview process

• HR interview (30 min)
• Tech+PM interview with live coding tasks (90 min)

Benefits for a 3-month contract

• Сompetitive monthly compensation
• Flexible working schedule
• Working remotely
• Full support of Private Entrepreneur reporting services (ФОП)

About the client:

Our customer is the European online car market with over 30 million monthly users, with a market presence in 18 countries. As a Senior Atlassian Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers.

Responsibilities:

• Organise the migration of Slack and Atlassian from one company to another with data preservation 

Requirements: 

• 4+ years of experience as an Atlassian Engineer or a similar technical role.
• Proficiency with JCMA (Jira Cloud Migration Assistant) and CCMA (Confluence Cloud Migration Assistant).
• Ability to map custom fields, issue types, and complex workflows from the old instance to the new one without losing history.
• Skill in auditing 3rd-party marketplace apps (e.g., ScriptRunner, Tempo)
• Experience moving multiple workspaces into a single Slack Enterprise Grid org.
• Familiarity with Slack's Corporate Export tools and handling JSON/CSV data files.
• Experience with connecting Jira, Confluence, and Bitbucket "hooks" in the new Slack environment.
• Skills of configuring Okta, Azure AD, or Google Workspace with Atlassian Access and Slack.
• Experience with Python/Bash Scripting
• Deep SQL knowledge
• English level - upper intermediate or higher 

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Business Development Manager / SDR (Cloud)

SOFTPROM | Remote (Poland)

SOFTPROM is an international Value Added IT Distributor with more than 25 years of experience, actively expanding its cloud business across Europe.
We are looking for a Business Development Manager / SDR (Cloud) to develop the Polish market and work with leading global cloud vendors.

Vendors

AWS · Google Cloud · Zoom · GitLab · Pitch Avatar · Anthropic · TL;DV

Territory

Poland (local and international customers)

Cooperation format

• Fully remote
• Contract with the parent company (Austria)
   

Responsibilities

• Promote cloud solutions from the listed vendors in the Polish market
• Actively search for and attract new customers (SDR / BDM function)
• Work with leads: qualification, nurturing, and pipeline development
• Conduct presentations, demos, and participate in pilot projects (POCs)
• Achieve sales targets and non-financial KPIs
• Manage deals with a long and complex sales cycle
• Sales planning, forecasting, and reporting in CRM
• Collaborate closely with vendors and internal teams
   

Requirements

• 1+ year of experience as a BDM / SDR / Sales Manager in the cloud domain
• Hands-on experience in selling cloud solutions (AWS and/or Google Cloud is a strong plus)
• Solid understanding of cloud technologies and their business value
• Experience in complex B2B negotiations and closing long-cycle deals
• Strong presentation and public speaking skills
• Experience working with CRM systems
• Polish — fluent, English — Upper-Intermediate+
   

Personal qualities

• Proactive, results-driven mindset
• High level of responsibility and self-organization
• Strong teamwork and collaboration skills
• Initiative and motivation to grow in cloud and AI technologies
   

Nice to have

• Experience working with Enterprise customers
• International sales experience
• Vendor certifications (AWS / Google Cloud / GitLab)
   

We offer

• Competitive compensation: fixed salary + sales bonus (discussed individually)
• Fully remote work format
• Opportunity to work with top-tier global cloud vendors
• International markets and complex B2B projects
• Professional growth in cloud and AI-related directions
• Strong expertise, support, and real career development opportunities

On behalf of our Client, a well-established financial institution from the Netherlands, Mobilunity is looking for a Full Stack developer for a longterm engagement.

Our Client is building a powerful new SaaS platform for premium restaurants to manage their own e-commerce, visibility, and retention—replacing tools like Shopify, Mailchimp, and Clavio with a tailored all-in-one solution.

To support this transformation, we’re seeking a hands-on Technical Lead who will architect solutions, guide developers, and collaborate deeply with product and business stakeholders. You’ll drive engineering decisions and ensure the delivery of scalable, clean, and reliable systems.

Key Responsibilities:

• Develop clean, scalable code using Python (Django) 70% and React/Next.js 30% or vice verse
• Collaborate with tech lead and product manager to refine implementation
• Take ownership of services end-to-end: from feature spec to delivery
• Work across backend and frontend, with focus flexibility (backend-leaning or frontend-leaning is OK)
• Embrace agile delivery and AI-powered workflows for speed and quality

Requirements:
 

• 5+ years in full-stack development
• Fluency in Python/Django, JavaScript/React, Next.js leaning to backend or frontend is OK
• Comfortable with PostgreSQL, REST APIs, GCP
• Proactive communication and ownership mindset
• Interest in customer experience, not just specs

Nice to Have:

• Experience in product-led SaaS environments
• Exposure to foodtech, marketplaces, or e-commerce products
• Use of AI-enhanced dev tools (Cursor, Copilot, Claude Code)

Tech Stack:

• Backend: Python, Django, FastAPI.
• Frontend: React, Next.js.
• DB: PostgreSQL.
• Cloud: GCP.
• Process: Agile, AI-enhanced workflows.
• Tools: Cursor/Claude Code, Slack, Figma.

Come on board, and let’s grow together!

Note: Please apply for this position only if you have proven experience working with crypto, blockchain, or wallet development.

The client is an innovative global fintech leader behind USDT, the world’s largest and most widely used stablecoin.

We are looking for a React Native Developer with solid experience in blockchain/crypto/ wallets to help us build secure applications.

Responsibilities

• Design, develop and maintain mobile applications using React Native (iOS & Android)
• Integrate applications with Bitcoin / Web3 / blockchain APIs and wallet backends
• Work with wallet functionality: addresses, balances, transactions, seed phrases, private keys (never exposing them insecurely)
• Implement mobile security best practices: secure storage, encryption, device integrity checks, protection from common attack vectors
• Collaborate with backend, security, and product teams to design features for decentralized and crypto-enabled products
• Participate in code reviews, architecture discussions, and technical decisions
• Write clean, testable, well-documented code

Requirements

• 4+ years of experience in in React Native
• Strong knowledge of TypeScript / JavaScript and the React ecosystem
• Proven experience with blockchain / crypto / wallet applications
• Experience working with Bitcoin, Web3, wallets, private keys, or similar technologies
• Good understanding of mobile security: secure storage, key management, encryption, secure communication
• Understanding of decentralized systems and concepts like public/private keys, transactions, addresses, signing, gas/fees, etc.
• Experience integrating REST/WebSocket APIs and working with real-time data
• Comfortable working in a remote, distributed team, communicating in English (spoken and written)

Nice to have

• Experience with hardware wallets or secure elements
• Knowledge of Layer 2 solutions, sidechains, or Lightning Network
• Experience with performance optimization and profiling for mobile apps
• Background in cryptography or security engineering

N-iX is looking for a Senior Node.js Engineer for one of our clients.

The first Israeli SMS aggregator - connecting businesses of all sizes to the world with an API that developers love with a live, large-scale messaging platform powering tens of millions of events daily under strict SLA requirements. We provide the backbone infrastructure that enables reliable and real-time communication at scale.

Role mission
Join the core engineering team of client, a live large-scale messaging platform, and act as a production-grade backbone engineer responsible for systems processing tens of millions of events per day under strict SLA requirements.

This is a long-term, full-time role focused on stability, scalability, and reliability, rather than feature velocity at the expense of quality.

Key Responsibilities:

• Design, develop, and maintain large-scale messaging and event-driven backend platforms.
• Drive migration initiatives from monolithic to microservices architectures.
• Champion low-latency, real-time system operation (WebSockets, Socket.IO, streaming pipelines).
• Ensure reliability and observability through strong monitoring and incident handling systems.

• Collaborate and integrate deeply with the engineering team to guarantee long-term platform evolution and quality.

   

Mandatory Experience:

• Backend Engineering: 8+ years of hands-on backend experience.
• Expertise: Node.js, TypeScript at a production and expert level.
• Architecture: Microservices design and migration from monoliths.
• API Design: REST, OpenAPI / Swagger.
• High-Load Messaging: Proven experience with high-throughput systems; message queues/event-driven (Kafka or RabbitMQ mandatory).
• Resilience: Handling backpressure, retries, DLQs, idempotency, rate limiting, failure isolation.
• Realtime Systems: Experience with realtime systems (WebSockets, Socket.IO, WebRTC, streaming pipelines), processing telemetry or delivery reports.
• Databases & Caching: PostgreSQL/MySQL (schema design, performance tuning), Redis for caching/buffering.
• Cloud & Deployment: Strong experience with GCP, Docker, CI/CD pipelines.
• Observability: Prometheus, Grafana, Datadog, Sentry, or Kibana.

• Production Readiness: Experience in incident response and on-call rotations.

   

Strong Advantages (Nice to Have):

• Payments, fintech, or banking system experience.
• Security and authentication (JWT, OAuth2).
• Infrastructure as Code (Terraform).
• Kafka at scale.
• Technical leadership, system ownership roles.

• Experience with unstable third-party APIs.

   

Soft Skills:

• Strong ownership and system-level thinking.
• Calm under pressure, Excellent English communication.
• Team-first orientation (not freelance-focused).

• Proactive and independent within a collaborative environment.

   

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

N-iX is a global software development service company that helps businesses across the globe create next-generation software products. Founded in 2002, we unite 2,400+ tech-savvy professionals across 40+ countries, working on impactful projects for industry leaders and Fortune 500 companies. Our expertise spans cloud, data, AI/ML, embedded software, IoT, and more, driving digital transformation across finance, manufacturing, telecom, healthcare, and other industries. Join N-iX and become part of a team where your ideas make a real impact.

 

This role is ideal for someone at the beginning of their data engineering career who wants to grow in a supportive environment. We value curiosity, a learning mindset, and the ability to ask good questions. If you’re motivated to develop your skills and become a strong Data Engineer over time, we’d be happy to help you grow with us 🚀

Responsibilities

• Support the implementation of business logic in the Data Warehouse under the guidance of senior engineers
• Assist in translating business requirements into basic data models and transformations
• Help develop, maintain, and monitor ETL pipelines using Azure Data Factory
• Participate in data loading, validation, and basic query performance optimization
• Work closely with senior team members and customer stakeholders to understand requirements and data flows
• Contribute to documentation and follow best practices in data engineering and development
• Gradually propose improvements and ideas as experience grows
  
   

Requirements

• Up to 1,5 years of experience in Data Engineering
• Basic hands-on experience with SQL and strong willingness to work with it as a core skill
• Familiarity with Microsoft Azure or strong motivation to learn Azure-based data solutions
• Understanding of relational databases and fundamentals of data modeling
• Ability to write clear and maintainable SQL queries
• Basic experience with version control systems (e.g. Git)
• Interest in data warehousing and analytical systems
• Familiarity with Agile ways of working (through coursework, internships, or first commercial experience)
• Strong analytical thinking and eagerness to learn from more experienced colleagues
  
   

Nice to Have

• Exposure to Azure Data Factory, dbt, or similar ETL tools
• Basic knowledge of Databricks
• Understanding of Supply Chain & Logistics concepts
• Any experience working with SAP data (MM or related modules)