LITSLINK

LITSLINK is looking for a QA Engineer (Manual) to join a long-term project focused on building a privacy-first secure mobile messenger.

You will work on a complex product with a strong focus on security, real-time communication, and multi-device consistency, where QA is an integral part of the development process.

Project

• Secure mobile messenger (iOS & Android)
• End-to-end encryption by default
• Multi-device support
• Real-time messaging and calls
• On-device AI features

Format

• Remote
• Part-time (≈20h/week)
• Long-term

Responsibilities

• Perform manual testing of mobile applications (iOS & Android)
• Validate critical flows: authentication, messaging, calls, multi-device sync
• Test real-time features under different network conditions
• Identify edge cases and нестандартні сценарії
• Perform API testing and basic network inspection
• Participate in regression testing before releases
• Collaborate with QA Lead and engineers

Requirements

• 3+ years of experience in mobile QA (iOS & Android)
• Experience testing complex mobile applications
• Experience with API testing (REST, Postman)
• Experience with network tools (Charles / proxy)
• Experience testing real-time features (chat / sync / notifications)
• Strong attention to detail and analytical thinking
• Upper-Intermediate+ English

Nice to have

• Experience with WebRTC / VoIP testing
• Understanding of security / encryption basics
• Experience with messaging / fintech / security products
• Experience with real devices testing
• Basic understanding of test automation

Why join

• Work on a security-focused product
• Complex real-time system, not just UI testing
• Opportunity to grow in security and mobile domain
• Flexible part-time format

LITSLINK is looking for a QA Lead to join a long-term project focused on building a privacy-first secure mobile messenger.

This is a hands-on role where you will own QA processes and drive automation for a product with a strong focus on security, end-to-end encryption, and real-time communication.

Project

• Secure mobile messenger (iOS & Android)
• End-to-end encryption by default
• Multi-device support
• Real-time messaging and calls

• On-device AI features

   

Format

• Remote
• Part-time (≈20h/week)

• Long-term

   

Responsibilities

• Own QA processes and test strategy
• Define test coverage and release quality standards
• Build and maintain automation (mobile + API)
• Integrate tests into CI/CD (GitHub Actions or similar)
• Validate critical flows: messaging, calls, multi-device sync
• Perform basic security validation (no plaintext data exposure)
• Collaborate closely with engineers and PM

Requirements

• 4+ years in QA (mobile focus)
• Strong experience with automation (Appium / Selenium / Cypress / Playwright)
• Experience with CI/CD pipelines
• Experience testing mobile apps (iOS & Android)
• Solid understanding of API testing
• Experience with network tools (Charles / proxies)
• Strong ownership and analytical thinking
• Upper-Intermediate+ English

Nice to have

• Experience with real-time apps (chat / calls / WebRTC)
• Understanding of security / encryption basics
• Experience with performance testing

Why join

• Security-focused product (not just another app)
• High-impact role with ownership
• Flexible part-time format

LITSLINK is looking for a Senior DevSecOps / Infrastructure Engineer to join a long-term client project focused on building a privacy-first, zero-knowledge secure product.

This is a highly security-driven role where you will work on tamper-resistant infrastructure, data minimization, and security-by-design architecture.

Location & Format

• Remote
• Full-time
• Long-term
• Contract (gross)

Responsibilities

• Design and maintain secure cloud and/or bare-metal infrastructure
• Work with Kubernetes (network policies, cluster security, isolation)
• Implement Infrastructure as Code (Terraform / Ansible)
• Manage secrets and encryption systems (Vault, KMS, HSM)
• Build and support immutable infrastructure
• Develop secure CI/CD pipelines (reproducible builds)
• Set up monitoring with minimal logging (Prometheus, Grafana)
• Work with privacy-preserving networking / obfuscation techniques
• Participate in security reviews and architectural decisions

Requirements

• 6+ years of experience in DevSecOps / Infrastructure
• Strong Linux expertise (including system hardening)
• Hands-on experience with Kubernetes in production (security focus)
• Solid experience with Docker
• Experience with Terraform and/or Ansible
• AWS or GCP experience
• CI/CD pipelines setup and maintenance
• Experience with secrets management systems
• Monitoring experience (Prometheus, Grafana)
• Strong security mindset (threat modeling, risk mitigation)

Nice to Have

• Experience with immutable infrastructure
• Verifiable / reproducible builds
• Vault / HSM experience
• Experience with privacy-first products
• Bare-metal infrastructure (e.g., Hetzner)
• Zero-log or minimal logging approaches

Hiring Process

• Screening interview
• Technical interview
• Fast decision

We are looking for an experienced Sales Manager (Upwork) to join our team and strengthen our sales direction at LITSLINK.

This role is ideal for a specialist with 2+ years of hands-on experience selling IT services via Upwork, who can independently drive the full sales cycle - from identifying opportunities to closing deals and building long-term client relationships.

Location: Remote
Cooperation Type: Full-time  
Start: ASAP

Requirements

• 2+ years of experience selling IT services via Upwork
• Proven track record of closing deals on Upwork
• Strong skills in writing high-converting proposals
• Experience in client communication and negotiations
• Solid understanding of web/mobile development and common tech stacks
• Basic understanding of SDLC and software delivery processes
• English level: Upper-Intermediate or higher
• Result-oriented, proactive, and autonomous mindset

Nice to have

• Experience working in IT outsourcing / outstaffing companies
• Experience with long-term client relationship management
• Understanding of pricing, estimations, and delivery processes
• Experience working with CRM tools

Responsibilities

• Sell IT services (software development, dedicated teams, UX/UI) via Upwork
• Search for relevant projects and identify high-potential opportunities
• Write strong, personalized proposals with high conversion rate
• Lead clients through the full sales cycle - from first message to deal closure
• Handle pre-sales activities: requirements clarification, solution positioning, basic estimations
• Build and maintain long-term relationships with clients
• Achieve and exceed sales KPIs
• Collaborate closely with recruitment and technical teams

What We Offer

• Commission from 5% to 25% depending on deal type and channel
• Strong earning potential for top performers - up to $10k+ per month
• Remote-first format with flexible working hours
• High level of flexibility (non-exclusive cooperation model, based on performance)
• Legal and organizational support for international cooperation
• Opportunities for business trips and collaboration with international clients
• Long-term growth and potential revenue-sharing programs

Hiring Process

• Screening call with recruiter
• Interview with Head of Sales  
• Cooperation offer

LITSLINK is looking for a motivated Junior Sales Manager with initial experience in sales (3–12 months) who wants to grow in IT services sales and develop skills in client acquisition via outbound channels and platforms.

This role is ideal for candidates who already have basic exposure to sales or lead generation, strong communication skills, and a desire to build a career in IT outsourcing. You will work with real projects, receive mentorship from experienced sales managers, and gradually take ownership of your deals.

Requirements

• 2-3+ months of experience in sales / lead generation / customer communication
• Strong interest in IT services and software development
• English level: Intermediate+ (written & spoken)
• Good written communication skills
• Understanding of basic sales processes and willingness to work with KPIs
• Proactive, responsible, and result-oriented mindset
• Basic experience with B2B communication or client interaction
• Readiness to work with cold outreach (Upwork, LinkedIn, email, etc.)

Nice to have

• Experience with freelance platforms (Upwork or similar)
• Previous experience in IT sales / lead generation / recruitment
• Basic understanding of web/mobile development and tech stacks
• Familiarity with SDLC
• Experience with CRM tools (HubSpot, Pipedrive, etc.)

Responsibilities

• Work on selling IT services (software development, dedicated teams, UX/UI) via outbound channels and platforms
• Search for relevant projects and write proposals
• Communicate with leads and participate in pre-sales activities
• Qualify incoming requests and clarify client requirements
• Support estimation and deal-closing process together with senior team members
• Maintain CRM and sales reports
• Follow internal sales processes, templates, and guidelines
• Gradually take ownership of deals and bring first clients

We offer

• Structured onboarding and mentorship with growth to Middle Sales Manager
• Commission-based income model with strong earning potential
• Flexible, remote-first work format
• High level of flexibility (non-exclusive cooperation model, subject to KPIs)
• Opportunities for international collaboration and future business trips
• Legal and organizational support for international cooperation
• Professional growth in IT outsourcing / outstaffing environment
• Supportive sales and delivery teams

Hiring process

• Screening call with a recruiter
• Interview with Head of Sales / Business Development
• Final decision & cooperation offer

We are looking for a Junior React Native Developer to join our team and work on cross-platform mobile applications for iOS and Android.

This role is a great fit for someone with initial hands-on experience in React Native who wants to grow in a collaborative environment, gain real project experience, and develop strong mobile development skills.

Location: Remote
Cooperation Type: Full-time / part-time
Start: ASAP

Responsibilities

• Develop and support mobile applications using React Native
• Work with Expo (managed or bare workflow)
• Integrate REST APIs using Fetch / Axios
• Implement navigation using React Navigation
• Assist in implementing application features (e.g., subscriptions, media, etc.)
• Support application releases to App Store and Google Play (with guidance)
• Collaborate with designers and backend developers
• Participate in code reviews and improve code quality

Requirements

• 6+ months of experience with React Native (commercial or strong pet-projects)
• Basic knowledge of TypeScript
• Understanding of React fundamentals (hooks, state management)
• Experience working with REST APIs
• Familiarity with React Navigation
• Basic understanding of mobile development concepts
• English - Intermediate or higher

Nice to Have

• Experience with Expo
• Understanding of mobile app release process
• Experience with subscriptions or in-app purchases
• Experience with audio or media features
• Understanding of iOS / Android platform differences

What We Offer

• Flexible workload (full-time or part-time options)
• Long-term cooperation
• Opportunity to work on different mobile projects
• Professional growth and mentorship
• Transparent processes and supportive team

We are looking for a Junior Full-Stack Developer (.NET & Angular) to join our team for long-term collaboration.

In this role, you will work on both backend and frontend parts of the system, contributing to feature development and improving your technical skills under the guidance of more experienced engineers. You will collaborate closely with the team and gradually take ownership of tasks and features.

Location: Remote
Cooperation Type: Full-time / part-time
Start: ASAP

Responsibilities

• Develop and maintain backend services using .NET (Core / .NET 6+)
• Implement frontend features using Angular
• Assist in designing and integrating RESTful APIs
• Work with relational databases and basic query optimization
• Participate in code reviews and follow coding standards
• Collaborate with QA and PM to deliver tasks on time
• Support and maintain existing system functionality

Requirements

• 1–2 years of commercial experience 
• Basic experience with .NET (C#, ASP.NET Core)
• Basic experience with Angular
• Understanding of RESTful API principles
• Familiarity with relational databases (PostgreSQL / MS SQL)
• Understanding of OOP principles
• Experience with Git
• English - Pre-Intermediate / Intermediate

Nice to Have

• Basic understanding of Docker
• Familiarity with cloud platforms (AWS or Azure)
• Basic understanding of CI/CD
• Experience with pet or educational projects

We Offer

• Fully remote work
• Stable, long-term cooperation
• Competitive compensation (gross)
• Learning and mentorship support
• A collaborative and transparent working environment

We are looking for a Junior+ AI/ML Engineer to join our team at LITSLINK and work on building and integrating machine learning solutions into real production systems.

This role is perfect for someone who already has initial hands-on experience with ML and wants to grow in real product environments with real data, models in production, and close collaboration with backend teams.

Location — Remote
Experience Level — Middle / Middle+

 

Qualifications

. Commercial or strong project-based experience in Machine Learning
. Strong Python skills for data processing and ML development
. Experience with ML frameworks (scikit-learn, PyTorch or TensorFlow)
. Understanding of core ML concepts (supervised learning, model evaluation, overfitting)
. Experience with data preprocessing (Pandas, NumPy)
. Basic understanding of ML model deployment in production environments
. Upper-Intermediate English or higher

Key Responsibilities

. Develop and integrate ML models into production systems
. Work with data preprocessing, feature engineering, and model training
. Build and support basic ML pipelines and MLOps processes
. Collaborate with backend engineers on ML integration via APIs
. Participate in experiments, model evaluation, and performance monitoring
. Contribute to improving ML code quality and best practices

What We Offer

. Long-term, full-time cooperation on international projects
. Remote-first format with flexible working hours
. Opportunity to grow into Middle AI/ML Engineer role
. Work with real production systems and real users
. Mentorship from senior ML and backend engineers
. Professional growth in applied AI and MLOps direction
. Stable workload and long-term cooperation with LITSLINK

What happens after you apply

. Quick screening call with our recruiter
. Technical interview with ML / engineering team
. Cooperation offer

Ми шукаємо організованого та проактивного Administrative Coordinator, який допоможе підтримувати внутрішні процеси команди, адміністративні задачі та щоденну роботу офісу.

Ця роль поєднує координацію адміністративних процесів, підтримку внутрішніх операцій та взаємодію з менеджментом у щоденних організаційних питаннях. Людина на цій позиції відповідатиме за комфортну робочу атмосферу в офісі, підтримку команди в адміністративних задачах, а також допомагатиме з координацією окремих внутрішніх процесів і операційних питань.

Основні обов’язки

Administrative Support

• Координація щоденної роботи офісу
• Замовлення канцелярії, води, господарських товарів та інших необхідних ресурсів
• Комунікація з постачальниками, сервісними компаніями та підрядниками
• Організація кур’єрських доставок і поштових відправлень
• Підтримка порядку та комфортної атмосфери в офісі
• Допомога з організацією внутрішніх зустрічей, подій та командних активностей
• Адміністративна підтримка команди та менеджменту
• Робота з офісною документацією

Operations Coordination

• Координація внутрішніх адміністративних та операційних задач
• Допомога з плануванням, супроводом і контролем виконання окремих внутрішніх задач
• Комунікація з підрядниками, партнерами та іншими контактними особами за потреби
• Допомога в організації зустрічей, поїздок і внутрішніх процесів
• Підтримка менеджменту в операційних та координаційних питаннях

Вимоги

• Досвід роботи на позиції Administrative Coordinator, Operations Coordinator, Administrative Assistant або подібній ролі буде перевагою
• Високий рівень організованості та відповідальності
• Вміння працювати з кількома задачами одночасно
• Хороші комунікаційні навички
• Впевнене користування Google Docs, Google Sheets та іншими офісними інструментами
• Проактивність, уважність до деталей та вміння тримати все під контролем

Буде плюсом

• Досвід роботи в IT або технологічній компанії
• Досвід організації внутрішніх подій або корпоративних заходів
• Базова англійська мова для робочої комунікації
• Досвід координації внутрішніх процесів або підтримки менеджменту в операційних питаннях
• Готовність за потреби брати участь у міжнародних відрядженнях

Ми пропонуємо

• Роботу в стабільній компанії з дружньою командою
• Комфортний офіс у Києві
• Повну зайнятість
• Конкурентну заробітну плату, що обговорюється індивідуально
• Можливість професійного розвитку та розширення зони відповідальності