Jobs Backend

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  • Β· 43 views Β· 12 applications Β· 1d

    Strong Python Engineer

    Full Remote Β· Countries of Europe or Ukraine Β· 5 years of experience Β· English - B2
    We are looking for you! We are looking for a Strong Python Engineer who wants to go beyond classical backend development and step into the world of AI-native systems and Generative AI architectures. You will work on real client engagements across...

    We are looking for you!
     

    We are looking for a Strong Python Engineer who wants to go beyond classical backend development and step into the world of AI-native systems and Generative AI architectures.


    You will work on real client engagements across industries, helping enterprises transform how they operate using Large Language Models, AI agents, retrieval systems, and intelligent automation.

    This is engineering-first, production-focused, system-level AI development.


    You will contribute to AI-native enterprise platforms, generative AI Proofs of Concept (POCs) and MVPs, agent-based systems and workflow orchestration, Retrieval-Augmented Generation (RAG) pipelines, enterprise AI integrations (CRM, ERP, document systems, knowledge bases), internal AI accelerators and reusable frameworks, and intelligent automation and workflow transformation.


    You will work at the intersection of backend engineering, data engineering, applied generative AI, LLM orchestration and cloud-native architecture.


    If you do not have hands-on experience in Generative AI yet - that is fine. What matters is strong engineering fundamentals and genuine curiosity.


    Qualifications & experience:
     

    • Strong proficiency in Python with experience building production backend systems (5+ years)
    • Good understanding of software architecture principles
    • Hands-on experience working with services of at least one cloud provider (AWS / Azure / GCP)
    • You are comfortable going beyond pure engineering - you can contribute to product thinking, consulting discussions, and solution ideation;
    • You are particularly interested in emerging AI technologies, LLMs, and generative AI, and follow new developments in the field;
    • You understand how business value can be generated through AI technologies and can articulate this clearly;
    • You enjoy communication and can effectively interact with both technical and non-technical stakeholders;
    • You are a proponent of agentic coding and utilize it daily.

     

    Nice to have:
     

    • You have experimented with agentic workflows and LLMs via pet projects;
    • You are an active user of agentic AI for your daily tasks and excited about where things are going;
    • You’ve looked into integrating with LLM APIs, used LangChain / LangGraph / similar frameworks, digged into RAG and prompt engineering fundamentals;
    • You are curious about AI evaluation methodologies and gained some theoretical knowledge;
    • You’ve implemented data pipelines (ETL, batch/stream processing).


    What impact you’ll make:
     

    You will help enterprises:

    • Automate complex workflows;
    • Enhance decision-making with AI;
    • Build conversational and agent-based systems;
    • Transform how knowledge is accessed and used;
    • Move from experimentation to production-grade AI.

     

    What you’ll get 
     

    We offer a rewarding compensation and benefits package, an intellectually and creatively stimulating environment, professional flexibility, and unique international travel opportunities. 

    Star is an Equal Opportunity Employer. We believe that equity, diversity, and inclusion are key to our ability to provide our clients and crew members with unique business and career outcomes. Your race, color, ancestry, religion, gender, identity, sexual orientation, age, marital status, and disability have no effect on our hiring decisions. If you have a special need that requires accommodation, please let us know.

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  • Β· 5 views Β· 0 applications Β· 1d

    Middle Scala Engineer (Scala/Spark, Azure, Databricks) to $4300

    Full Remote Β· Countries of Europe or Ukraine Β· 3 years of experience Β· English - B2
    CrunchCode β€” ΠΌΡ–ΠΆΠ½Π°Ρ€ΠΎΠ΄Π½Π° сСрвісна Π†Π’-компанія Π· досвідом близько 7 Ρ€ΠΎΠΊΡ–Π² Ρƒ Ρ€ΠΎΠ·Ρ€ΠΎΠ±Ρ†Ρ– вСбсСрвісів Ρ– вСбзастосунків. Ми ΠΏΡ€Π°Ρ†ΡŽΡ”ΠΌΠΎ Ρƒ Ρ„ΠΎΡ€ΠΌΠ°Ρ‚Π°Ρ… staff augmentation (outstaff) Ρ‚Π° outsourcing Ρ– ΠΏΡ–Π΄ΠΊΠ»ΡŽΡ‡Π°Ρ”ΠΌΠΎ спСціалістів Π΄ΠΎ ΠΏΡ€ΠΎΡ”ΠΊΡ‚Ρ–Π² ΠΊΠ»Ρ–Ρ”Π½Ρ‚Ρ–Π² Ρƒ довгостроковій ΠΌΠΎΠ΄Π΅Π»Ρ–...

    CrunchCode β€” ΠΌΡ–ΠΆΠ½Π°Ρ€ΠΎΠ΄Π½Π° сСрвісна Π†Π’-компанія Π· Π΄ΠΎΡΠ²Ρ–Π΄ΠΎΠΌ близько 7 Ρ€ΠΎΠΊΡ–Π² Ρƒ Ρ€ΠΎΠ·Ρ€ΠΎΠ±Ρ†Ρ– вСбсСрвісів Ρ– Π²Π΅Π±Π·Π°ΡΡ‚осунків. Ми ΠΏΡ€Π°Ρ†ΡŽΡ”ΠΌΠΎ Ρƒ Ρ„ΠΎΡ€ΠΌΠ°Ρ‚Π°Ρ… staff augmentation (outstaff) Ρ‚Π° outsourcing Ρ– ΠΏΡ–Π΄ΠΊΠ»ΡŽΡ‡Π°Ρ”ΠΌΠΎ спСціалістів Π΄ΠΎ ΠΏΡ€ΠΎΡ”ΠΊΡ‚Ρ–Π² ΠΊΠ»Ρ–Ρ”Π½Ρ‚Ρ–Π² Ρƒ Π΄ΠΎΠ²Π³ΠΎΡΡ‚Ρ€ΠΎΠΊΠΎΠ²Ρ–ΠΉ ΠΌΠΎΠ΄Π΅Π»Ρ– співпраці.

    Ми ΠΏΡ€Π°Ρ†ΡŽΡ”ΠΌΠΎ ΠΏΠ΅Ρ€Π΅Π²Π°ΠΆΠ½ΠΎ Π· ΠΏΡ€ΠΎΡ”ΠΊΡ‚Π°ΠΌΠΈ Π² Π΄ΠΎΠΌΠ΅Π½Π°Ρ… логістики (Π²ΠΊΠ»ΡŽΡ‡Π½ΠΎ Π· last mile),e-commerce, fintech Ρ‚Π° Π±Π°Π½ΠΊΡ–Π½Π³Ρƒ, Π° Ρ‚Π°ΠΊΠΎΠΆ enterprise-Ρ€Ρ–ΡˆΠ΅Π½Π½ΡΠΌΠΈ.
    Для нас Π²Π°ΠΆΠ»ΠΈΠ²ΠΎ, Ρ‰ΠΎΠ± ΠΏΡ€ΠΎΡ”ΠΊΡ‚ Π±ΡƒΠ² β€œΡ‡ΠΈΡΡ‚ΠΈΠΌβ€ Ρ– Π·Ρ€ΠΎΠ·ΡƒΠΌΡ–Π»ΠΈΠΌ Π· Ρ‚ΠΎΡ‡ΠΊΠΈ Π·ΠΎΡ€Ρƒ Π΅Ρ‚ΠΈΠΊΠΈ Ρ‚Π° Ρ†Ρ–нності для користувачів.

    Ми ΠΏΡ€ΠΈΠ½Ρ†ΠΈΠΏΠΎΠ²ΠΎ Π½Π΅ Π±Π΅Ρ€Π΅ΠΌΠΎ ΠΏΡ€ΠΎΡ”ΠΊΡ‚ΠΈ, пов’язані Π·:
    ● gambling / Π³Π΅ΠΌΠ±Π»Ρ–Π½Π³ΠΎΠΌ,
    ● adult-ΠΊΠΎΠ½Ρ‚Π΅Π½Ρ‚ΠΎΠΌ Ρ‚Π° ΠΏΠΎΡ€Π½ΠΎΠ³Ρ€Π°Ρ„Ρ–Ρ”ΡŽ,
    ● ΡˆΠ°Ρ…Ρ€Π°ΠΉΡΡ‚Π²ΠΎΠΌ Π°Π±ΠΎ Π±ΡƒΠ΄ΡŒ-якою Ρ€ΠΎΠ·Ρ€ΠΎΠ±ΠΊΠΎΡŽ, Ρ‰ΠΎ ΡΠΏΡ€ΡΠΌΠΎΠ²Π°Π½Π° Π½Π° ΠΎΠ±ΠΌΠ°Π½ Ρ‡ΠΈ ΠΌΠ°Π½Ρ–пуляції.

    What We Offer:
    ● Fully remote work
    ● Long-term, stable project
    ● High level of autonomy and trust
    ● Minimal bureaucracy
    ● Direct impact on business-critical logistics systems
    ● Long-term engagement, not a short-term contract.

    Required: 
    Availability for business trips abroad (infrequent, but required)

    Project Overview:
    Healthcare solution needs to expand their team.

    Client Location: EU

    Requirements (Must-have):
    β€’ 2+ years experience in Scala (Spark)
    β€’ Bold experience in Azure, Databricks (no strictly in years).

    Hiring Process:
    - Intro call
    - Technical discussion (focused on real experience)
    - Offer
    Start: ASAP

     

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  • Β· 48 views Β· 6 applications Β· 1d

    Senior Node.js Engineer

    Full Remote Β· EU Β· 5 years of experience Β· English - B2
    This is us At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX, and UI design,...

    This is us

    At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX, and UI design, managed services, product development, and software development.

     

    This is the job
    Our client operates in the telecom domain, building enterprise-grade digital platforms and integration services. The project focuses on developing Backend-for-Frontend (BFF) services and core backend engines that enable seamless integration between frontend applications and large-scale enterprise systems such as CRM, billing, and CMS platforms.

    You will work in a cloud-native AWS environment with modern DevOps practices, contributing to scalable, secure, and business-critical solutions.

    This is you

    • 5+ years of professional software engineering experience
    • Strong backend development experience with Node.js and NestJS ( or or one of the following similar frameworks:
      Fastify, Express, Adonis)
    • Solid knowledge of TypeScript
    • Hands-on experience with Kubernetes, Docker, Helm
    • Experience with AWS cloud services and Amazon EKS
    • Infrastructure as Code with Terraform
    • Experience building large-scale, business-critical applications
    • Enterprise system integration (CRM, APIs, distributed systems)
    • Strong understanding of algorithms and data structures

       

      This is your role

    • Design and develop high-performance backend services using Node.js and NestJS
    • Build and maintain RESTful APIs and microservices
    • Develop Backend-for-Frontend (BFF) integration layers
    • Integrate with enterprise systems (CRM, internal APIs, headless CMS)
    • Implement Infrastructure as Code using Terraform
    • Provision and manage environments via GitOps, CI/CD, Helm, ArgoCD, and Amazon EKS
    • Participate in code reviews and Agile Scrum ceremonies
    • Ensure secure, scalable, and reliable enterprise solutions
    More
  • Β· 35 views Β· 4 applications Β· 1d

    PHP/WP Full-stack developer (Middle) to $2400

    Full Remote Β· Ukraine Β· 2.5 years of experience Β· English - B2
    We create technology that helps people explore the world, and we care about delivering real business value β€” not just writing code. We believe in ownership, proactive thinking, and strong collaboration across teams. Open communication, transparency, and...

    We create technology that helps people explore the world, and we care about delivering real business value β€” not just writing code. We believe in ownership, proactive thinking, and strong collaboration across teams. Open communication, transparency, and the ability to actively participate in discussions and decisions are essential for us.

    If you’re someone who takes initiative, enjoys sharing ideas, values teamwork, and wants to see how your work directly impacts users and the business β€” join our team.

     

    Must have

    • Strong knowledge of PHP 5.6+ and SQL (preferably MySQL)
    • Experience with HTML, CSS, and jQuery
    • Experience in working with at least one PHP framework
    • Hands-on experience with Git
    • Solid understanding of PSR standards and SOLID principles
    • Experience in working with CLI and running scripts via cron jobs
    • English level β€” Intermediate or higher to communicate with the client

     

    Would be a plus

    • Experience in maintaining and refactoring legacy codebases
    • Experience in optimizing complex MySQL queries and related reports
    • Experience in supporting WordPress websites (updates and content management)
    • Strong AI user

     

    Key responsibilities

    • Support and optimization of a legacy project (PHP 5.6, jQuery)
    • Optimization and maintenance of SQL queries (MySQL) and reports based on them
    • Support of WordPress projects (updates and content management)

     

    We offer

    • competitive salary and bonuses
    • an opportunity to work on interesting projects with a team of experts
    • professional and personal growth through the company’s encouraging program
    • feedbacks from supervisors and team members on a regular basis
    • flexible working hours to provide you with life-work balance
    • flexible vacation policy
    • paid sick leaves
    • English/Psychology classes
    More
  • Β· 15 views Β· 1 application Β· 1d

    AI-First Golang Developer (Go, Claude Code)

    Full Remote Β· Countries of Europe or Ukraine Β· 5 years of experience Β· English - B2
    We are looking for an AI-First Golang Developer. We don’t need coders, we need Golang backend engineers who build features end-to-end using Claude Code. Details: AI coding experience (mandatory!): experience with Claude Code β€” #1 priority, or experience...

    We are looking for an AI-First Golang Developer. We don’t need coders, we need Golang backend engineers who build features end-to-end using Claude Code.

     

    Details:

    • AI coding experience (mandatory!): experience with Claude Code β€” #1 priority, or experience with other agentic coding tools (Cursor, Windsurf, similar). Claude Code is what is used on the project
    • Senior Golang Developer, 5+ years of experience, can potentially consider really strong candidates with 4 years of experience
    • Strong proficiency in English (Upper-intermediate level or Advanced)
    • Full-time
    • Fully remote
    • Start: ASAP, ideally, or can be discussed. 1 month’s notice will not work

    What you’ll actually do:

    • Own features end-to-end: from specs to deployment to fixing bugs
    • Use Claude Code to generate Golang backend code
    • Review AI output for quality and architectural fit
    • Fix bugs to learn our codebase, then rapidly build new features
    • Make quick decisions on what to build vs buy vs generate with AI
    • Talk to customers when they report issues and ship fixes same day

    Our stack:

    • Backend: Go monorepo (no framework, 3+ services)
    • Hosting: PaaS-managed containers, local setup fully mirrors production via Docker Compose
    • Tools: Jaeger tracing, Betterstack (Logging, Alerting), Redis Asynq queue
    • Databases: PostgreSQL, Redis
    • AI tooling: Claude Code (mandatory)

    Products you will build:

    • Platform: data- and AI-focused features, internal tooling, agentic systems
    • Integrations: API connections to supplier and business client platforms, data ingestion pipelines, LLM providers

    You must have:

    • Ownership mentality with a strive for elegantly simple, high-quality solutions
    • Strive for max quality β€” you test your own work thoroughly since we have no QA team, everything you ship MUST work
    • Product mindset β€” you care about WHY we’re building something
    • Proven experience using Claude Code or similar agentic AI (Cursor, Windsurf)
    • Strong Golang experience β€” you’ll review AI’s code in these, and you must understand how it works
    • Passion for simple, secure, and observable systems that perform well even under massive load
    • Ability to do on-call once in a while to help maintain our platform’s reliability & uptime
    • Broad architectural knowledge of building modern full-stack applications
    • Excellent spoken English and a good internet connection for daily video calls

    You are a great fit if you:

    • Get frustrated when development takes weeks instead of days
    • You think in features and architecture, and not single lines of code
    • Can spot subtle bugs in AI-generated code quickly
    • You ship fast, but always verify it actually works
    • Have shipped real products that customers actually use
    • Think β€œhow can AI build this?” as your first instinct

    Red flags (don’t apply if):

    • You’ve never used Claude Code or similar AI coding tools
    • You’re a perfectionist who loves to code
    • You need detailed specs before starting
    • You see AI as a threat rather than leverage
    • You’re outside the European timezone
    More
  • Β· 214 views Β· 31 applications Β· 1d

    Python Engineer with Agentic AI - Ukraine location only

    Full Remote Β· Ukraine Β· Product Β· 3 years of experience Β· English - B2
    Who we are looking for We are seeking a talented Middle Python Developer with expertise in Generative AI and Agentic AI to join our innovative team. You will work with cutting-edge large language models and AI infrastructure to build solutions that...

    Who we are looking for

    We are seeking a talented Middle Python Developer with expertise in Generative AI and Agentic AI to join our innovative team. You will work with cutting-edge large language models and AI infrastructure to build solutions that transform our clients' businesses.
     

    Required Skills:

    • Strong Python programming experience with AI frameworks like LangGraph
    • Hands-on experience with Large Language Models (OpenAI, Anthropic, Google Gemini)
    • Knowledge of Vector Stores and their application in AI workflows
    • Experience with GCP and integrating AI models with APIs and cloud platforms
    • Familiarity with CI/CD practices
    • Excellent English communication skills and ability to work in cross-cultural teams
       

    Nice to have:

    • Experience in AI-driven startups or technology companies
    • Knowledge of Azure or AWS
    • Familiarity with RAG concepts and implementation
       

    Your future role:

    As a Middle Python Developer, you will be at the forefront of AI innovation, working with advanced technologies and international teams to deliver impactful solutions.
     

    Your responsibilities:

    • Develop and maintain Python applications focused on Generative AI and Agentic AI
    • Work with large language models (OpenAI, Anthropic, Google Gemini) to build innovative AI solutions
    • Integrate AI models with various APIs and cloud platforms
    • Collaborate with cross-functional teams to deliver robust AI solutions
    • Participate actively in team discussions and contribute to project success
       

    What we offer:

    • Develop and maintain efficient, scalable, and clean Python code
    • Design and implement new features to meet client needs
    • Optimize application performance and ensure smooth functionality
    • Identify and troubleshoot issues, addressing bottlenecks in the codebase
    • Collaborate with cross-functional teams throughout the development lifecycle
    • Maintain high standards for code quality and automation practices
    • Continuously learn and adopt emerging technologies into development processes 
       

    Selection process:

    • Application and CV review
    • Short call with recruiter
    • Technical interview with tech expert and Delivery manager
    • Final interview in English
    • Offer and onboarding
    More
  • Β· 205 views Β· 15 applications Β· 1d

    Senior Python GenAI Engineer - Ukraine location only

    Full Remote Β· Ukraine Β· Product Β· 5 years of experience Β· English - B2
    Who we are looking for: 5+ years Python (complex backend & AI projects) Expertise in LangChain, LangGraph, AutoGen, CrewAI, or similar agentic AI frameworks Hands-on experience with LLMs (OpenAI, Anthropic Claude, Google Gemini), multi-agent systems,...

    Who we are looking for:
     

    • 5+ years Python (complex backend & AI projects)
    • Expertise in LangChain, LangGraph, AutoGen, CrewAI, or similar agentic AI frameworks
    • Hands-on experience with LLMs (OpenAI, Anthropic Claude, Google Gemini), multi-agent systems, RAG architectures, vector databases (Pinecone, Weaviate, etc.)
    • Proven delivery of production AI systems, CI/CD, cloud (AWS, Azure, GCP)
    • Strong mentoring/leadership skills, excellent English (B2+)


    Nice to have:
     

    • MLOps/AgentOps (MLflow, LangFuse), async/distributed, Docker, Kubernetes
    • Enterprise API integrations, open-source contributions
       

    Your future role:
     

    • Architect and develop enterprise-grade multi-agent AI solutions
    • Technology selection, code & architecture review, standard setting
    • Integrate LLMs, RAG, orchestration, and APIs
    • Mentor team members, share knowledge, provide pre-sales technical expertise
    • Present solutions to clients, optimize systems, and contribute to R&D
       

    What we offer:
     

    • Cutting-edge AI projects for top international clients
    • Premium access to AI/ML tools and learning budget
    • Flexible remote work, global and diverse team
    • Health insurance, well-being support, transparent career track: Senior β†’ Lead β†’ Principal/Architect
       

    Selection process:

    • CV Review
    • Screening call with recruiter
    • Technical interview with Delivery manager
    • Team fit/cultural interview
    • Offer
    More
  • Β· 176 views Β· 30 applications Β· 1d

    Senior Backend Developer (Node.js) to $3800

    Full Remote Β· Countries of Europe or Ukraine Β· 4 years of experience Β· English - B2
    About Us: LineUp is a fast-growing IT outsourcing company with 13 years of experience. We are currently looking for a Senior Backend Develope to join a long-term product project. You will become part of the Smart City ecosystem - a large-scale software...

    About Us:

    LineUp is a fast-growing IT outsourcing company with 13 years of experience. We are currently looking for a Senior Backend Develope to join a long-term product project.

     

    You will become part of the Smart City ecosystem - a large-scale software product for the Middle East market. This is a fully agile, product-oriented environment with real users and a tangible impact on urban infrastructure.

     

    Key Responsibilities:

    • Architect and develop robust backend applications using Node.js and NestJS in a monorepo and microservices environment.
    • Design, implement, and manage highly scalable database solutions using PostgreSQL (AWS RDS) and caching strategies with Redis.
    • Develop and maintain integrations with various AWS services including SQS, S3, Lambda, IAM, System Manager, EC2, and EKS/ECS for cloud-native applications.
    • Manage and optimize containerization and deployment processes with Docker, including building and pushing to registries, and implementing CI/CD pipelines using GitLab runners.
    • Implement monitoring and observability using Prometheus and Grafana to ensure system reliability and performance.
    • Collaborate with stakeholders to gather business requirements and translate them into technical solutions, driving discussions at the architecture and implementation levels.
    • Lead troubleshooting and debugging efforts to resolve complex backend issues and optimize system performance.
    • Stay current with the latest technologies and best practices, and promote continuous learning and self-development within the team. Mentor other team members, providing guidance and sharing your knowledge.
    • Participate in the agile development process, contributing to scram events, fostering a collaborative and cross-functional team environment.
    • Development and maintenance of a high-level engineering culture within the team.

    Qualifications:

    • Minimum of 5 years of experience in backend development with strong proficiency in Node.js, NestJS, and related technologies.
    • Expertise in building and managing microservices architectures and a monorepo setup.
    • Extensive experience with PostgreSQL (AWS RDS), Redis, and other backend data storage and caching technologies.
    • Strong proficiency in AWS cloud services including but not limited to SQS, S3, Lambda, IAM, EC2, and EKS/ECS.
    • Solid understanding of Docker, CI/CD pipelines, and experience with GitLab runners.
    • Experience with monitoring tools such as Prometheus and Grafana.
    • Proven ability to document backend architectures, designs, and processes clearly and comprehensively.
    • Excellent problem-solving skills and attention to detail, with a passion for creating high-quality, performant code.
    • Ability to work effectively both independently and as part of a team in an agile environment.
    • Strong communication skills with the ability to interact professionally with stakeholders at all levels.
    • English at Upper-Intermediate level and above.

    What We Offer:

    • A collaborative and innovative work environment.
    • Professional development opportunities.
    • The chance to work on exciting and challenging projects.
    • A supportive company culture.
    More
  • Β· 26 views Β· 4 applications Β· 1d

    Senior Python Engineer

    Full Remote Β· Ukraine Β· 5 years of experience Β· English - B2
    Engineers on this team work on distributed systems, event-driven pipelines, and high-availability services with a strong emphasis on correctness, auditability, and operational excellence. You’ll collaborate closely with product, compliance, and other...

    Engineers on this team work on distributed systems, event-driven pipelines, and high-availability services with a strong emphasis on correctness, auditability, and operational excellence. You’ll collaborate closely with
    product, compliance, and other platform teams while helping shape foundational systems in a greenfield environment. This is a high-impact opportunity to apply deep backend expertise in Python and Kotlin to systems that matter to both customers and the business.
     

    What You'll Do:

    • With the support of your team’s tech lead and manager, you will break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others
      to ensure timely delivery of your work.
    • You will partner with other members of the B&H team to deliver on the tasks assigned to you by the tech lead or manager.
    • You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews.
    • You have strong verbal and written communication skills that support effective collaboration with our global engineering team.
       

    What We Look For:

    • We are looking for Backend engineers who can contribute to backend services and pipelines.
    • You have a total of 5+ years of experience as a software engineer.
    • You have experience designing, developing and launching APIs at scale using languages like Python or Kotlin.
    • Having front end experience in React is a bonus.
    • You have experience creating tests using JUnits, WireMocks
    • You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes.
    • You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily
      understood, well tested and extensible code.
    • You have solid experience working with source control systems like Git and GitHub, and understand how to create, update, and commit pull requests.
    More
  • Β· 66 views Β· 24 applications Β· 1d

    Node.js Developer(Outstaff)

    Full Remote Β· Worldwide Β· 5 years of experience Β· English - B2
    About us ZentixSoft is a young British-Ukrainian full-cycle IT company where we value People over processes. We are looking for "Architectural Heavyweights"β€”engineers who don’t just write code but design the foundations of high-scale financial...

    😊 About us

    ZentixSoft is a young British-Ukrainian full-cycle IT company where we value People over processes. We are looking for "Architectural Heavyweights"β€”engineers who don’t just write code but design the foundations of high-scale financial ecosystems.
     

    πŸ“ About the project & conditions

    We are embarking on a long-term mission (1.5 years+) to build and scale a production-grade Finance Ecosystem. This isn't just about CRUD operations; it’s about distributed systems, transactional integrity, and event-driven magic. 
     

    • Format: Full-time, Outstaff.
    • Location: 100% Remote.
    • Duration: Long-term (1.5+ years).
    • Start: ASAP.
       

    πŸ˜‰ What we expect from you

    • πŸ’Ž Node.js Authority: 5 years of backend experience with a deep mastery of TypeScript, Express, and NestJS.
    • πŸ—οΈ System Architect: Proven track record of architecting distributed systems from scratch using Clean Architecture principles.
    • πŸ“‘ Distributed Expert: Deep understanding of Microservices, Event-driven systems (Pub/Sub), and the Transactional Outbox pattern.
    • 🏦 Finance Veteran: Solid experience within the finance domainβ€”you understand the stakes of high-consistency data.
    • πŸ› οΈ Cloud & Data Pro: Hands-on experience with GCP (Cloud Run), Terraform (IaC), and complex data layers (Spanner, PostgreSQL, Redis, Elastic).
    • 🌍 English: Strong communication skills (at least Intermediate High/Upper-Intermediate).
    • 🧠 Ownership Mindset: You lead by example, mentor others, and take full responsibility for technical decisions.
       

    πŸš€ Your responsibilities

    • Drive Architecture: Lead the design and implementation of scalable backend services and microservices.
    • Technical Direction: Set the standard for code quality, system reliability, and long-term maintainability.
    • Service Structuring: Build and optimize event-driven workflows to ensure 99.9% reliability in a financial context.
    • Infrastructure as Code: Work closely with the DevOps side to manage environments via Terraform.
    • Collaboration: Act as a bridge between business requirements and complex technical execution.
       

    🌟 Would be a big plus

    • 🐍 Python: Experience with FastAPI for specific service components.
    • ⚑ Performance Tuning: Experience optimizing high-load systems and complex database queries.
       

    ✨ What awaits you at ZentixSoft

    • πŸ“ˆ Professional Growth. Individual development plans for your career path.
    • πŸ’΅ Salary Review. A structured policy to ensure your compensation grows with your impact.
    • πŸŽ“ Knowledge Sharing. Access to workshops and internal training.
    • πŸ—£οΈ English. We fully cover classes with a teacher to keep your communication sharp.
    • βš–οΈ Work-Life Balance. We work without overtime and respect your personal time.
    • 🦾 Trust. Zero micromanagementβ€”only freedom in making high-level technical decisions.
       

    πŸ“© If you are ready to take ownership of a large-scale financial engine β€” send your CV!

     

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  • Β· 259 views Β· 50 applications Β· 1d

    Senior Java Developer (US time zone)

    Full Remote Β· Countries of Europe or Ukraine Β· 5 years of experience Β· English - B2
    Overview: We are looking for a Senior Backend Engineer to lead the development of core backend services within a modern microservice infrastructure that powers mobile and embedded clients. This is a senior, hands-on role with architectural ownership,...

    Overview:
    We are looking for a Senior Backend Engineer to lead the development of core backend services within a modern microservice infrastructure that powers mobile and embedded clients. This is a senior, hands-on role with architectural ownership, ideal for an engineer who enjoys building scalable distributed systems, designing secure and reliable APIs, and mentoring other developers. You will drive technical decisions and collaborate closely with architects, frontend engineers, and product teams to deliver future-proof backend solutions.

     

    Responsibilities:

    • Lead the design and development of backend services using Java in a Docker/Kubernetes-based environment;
    • Drive architectural improvements and establish backend best practices across the platform;
    • Design, implement, and optimize event-driven systems based on Kafka;
    • Build secure, scalable RESTful APIs for internal and external consumers;
    • Design and query complex data models using PostgreSQL, with strong focus on performance and reliability;
    • Collaborate closely with frontend and product teams to deliver features end-to-end, from concept to production;
    • Ensure system reliability and observability through logging, tracing, and monitoring;
    • Enable integrations with data pipelines and ML-powered services as part of data-driven and AI initiatives;
    • Mentor junior engineers, conduct code reviews, and support team-wide technical growth.

     

    Requirements

    • 5+ years of professional experience in backend development within microservice and cloud-native environments;
    • Strong production experience with Java (e.g., Spring Boot or similar frameworks);
    • Python experience is a plus, especially for data pipelines, ML integration, or scripting tasks;
    • Deep understanding of:
      • Kafka and event-driven architectures;
      • PostgreSQL, including advanced schema design and query optimization;
      • Secure API design and implementation (OAuth2, HTTPS, mTLS).
    • Hands-on experience with Docker, Kubernetes, and CI/CD pipelines in production;
    • Proven ability to lead cross-functional technical initiatives and make architectural decisions;
    • Demonstrated experience mentoring or guiding less experienced engineers;
    • Exposure to video streaming backends or media platforms is a plus;
    • Strong interest or background in ML- or data-driven applications;
    • Bonus: Experience with observability stacks (e.g., Prometheus, Grafana) or real-time analytics systems.
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  • Β· 120 views Β· 12 applications Β· 1d

    Middle/Senior C# .NET Full Stack Developer

    Full Remote Β· Worldwide Β· Product Β· 3 years of experience Β· English - B1
    We're looking for a proactive and detail-oriented Middle/Senior .NET Engineer to join our growing team. You will be instrumental in developing cutting-edge our solutions using modern .NET technologies and contributing to our innovative What we are...

    We're looking for a proactive and detail-oriented Middle/Senior .NET Engineer to join our growing team. You will be instrumental in developing cutting-edge our solutions using modern .NET technologies and contributing to our innovative

    What we are looking for:
    Required:
    β€’    3+ years of experience in C# and .NET development (.NET 6/.NET 8)
    β€’    Strong experience with Blazor Server/WebAssembly for modern web applications, Angular, Angualr JS, 
    β€’    Solid knowledge of SQL databases and query optimization (SQL Server preferred)
    β€’    Hands-on experience with Azure cloud services (App Service, Functions, Cognitive Services, Storage)
    β€’    Experience with MongoDB and NoSQL database concepts
    β€’    Understanding of RESTful APIs and modern web architecture patterns
    β€’    Knowledge of Azure Service Bus for message queuing and event-driven architecture
    β€’    Experience with version control systems (Git) and CI/CD pipelines
    β€’    Fast-learning, attentive to details, proactive and mature in vision of deliverables

    Will be a plus:
    β€’    Experience with AI/ML integration and Azure Cognitive Services
    β€’    Knowledge of Entity Framework Core and advanced LINQ operations
    β€’    Familiarity with SignalR for real-time web functionality
    β€’    Experience with automated testing frameworks (xUnit, NUnit)
    β€’    Understanding of MCP (Model Context Protocol) and AI agent architectures
    β€’    Knowledge of TypeScript and modern JavaScript frameworks
    β€’    Experience with Azure DevOps and infrastructure as code
    What you'll do:
    β€’    Design and develop Blazor-based web applications with rich interactive UI components
    β€’    Build and optimize AI-powered profile enhancement services using Azure Cognitive Services
    β€’    Develop and maintain MongoDB data models and SQL Server reporting databases
    β€’    Implement Azure Service Bus messaging patterns for scalable background processing
    β€’    Create and consume RESTful APIs with proper authentication and authorization
    β€’    Collaborate with AI/ML specialists to integrate advanced profile analysis capabilities
    β€’    Write clean, maintainable code following SOLID principles and modern .NET best practices
    β€’    Implement real-time features using SignalR for live progress tracking
    β€’    Troubleshoot and optimize performance in cloud-native Azure environments

    The interview process consists of:
    1.    Intro call with our Solution Architect (15-60 min)
    2.   Technical assessment (2-4 hours) - coding challenge involving C# and database design
    3.    PI Tests (15-20 min)
     

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  • Β· 31 views Β· 5 applications Β· 1d

    Principal Backend Engineer (Platform Tribe)

    Full Remote Β· Countries of Europe or Ukraine Β· Product Β· 5 years of experience Β· English - B1
    Founded in 2012, Playson is a leading iGaming supplier recognised worldwide. We provide our customers with a high-end, microservice-based platform-as-a-service designed to process billions of financial transactions per day. We provide a cross-regional...

    Founded in 2012, Playson is a leading iGaming supplier recognised worldwide. We provide our customers with a high-end, microservice-based platform-as-a-service designed to process billions of financial transactions per day. We provide a cross-regional setup and are chasing latency reduction down to zero. We highly invest in delivering the best game experience and smooth connection regardless of the internet coverage and bandwidth of the game clients.

    Role Overview:

    One of our teams is looking for a Principal Backend Engineer to participate in developing our cutting-edge solution, where milliseconds matter. Our problem statement is not straightforward, as we aim to achieve high-end results in all important technical aspects of our business: Best availability | Lowest possible latency | The most efficient resource usage.

     

    If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast "PoC first" approach with a deep sense of ownership, we would love to hear from you.

     

    Why Join Us?

    • Be a key player in a major tech transformation.
    • Work on projects that impact millions globally.
    • Enjoy a supportive, flexible work environment.
    • Grow your skills with continuous professional development opportunities.

     

    To succeed in the role, you will have:

    • Solid experience with Node.js/TypeScript is ideal, but we also welcome experts in other OOP languages such as Java, Python, C++, C#, or Go.
    • Strong understanding of Async approaches
    • Experience with Messaging systems like Kafka, RabbitMQ
    • Experience in distributed systems
    • Experience with RDBMs (MySQL, PostgreSQL etc.), CDBMs (Redshift, ClickHouse etc.), NoSQL (DynamoDB, MongoDB, etc)
    • Experience in writing e2e & unit tests
    • Experience with development production-ready solutions

     

    Preferred additional qualifications:

    • Understanding of enterprise development patterns
    • Experienced with large-scale microservices architecture
    • Experience with cloud providers (AWS, GCP, etc.)
    • Experience with Kubernetes
    • Active performance observation
    • Gambling domain experience
    • Understanding of application security and industry standards, its best practices
    • A degree in Computer Science or related field

       

    What will you be doing?

    • Become part of a full-stack team of the product, which is positioned as an independent part of the platform
    • Develop brand new features with a distributed team and be proactive in terms of proposing new ideas
    • Develop a scalable high load system, with financial resultsΚΌ responsibility
    • Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems.
    • Code and Architectural review
    • Proactive position in solution development, processes improvements
    • Handle complex business problems that might arise during solution development and provide field support with creative and rapid solutions

       

    What you get in return:

    • Competitive Salary and annual performance/salary reviews
    • Realistic and transparent Bonus system (15-20%), paid quarterly
    • Unlimited paid vacation leave & paid sick leave
    • Flexible work schedule to accommodate your needs
    • 100% Remote
    • Medical Insurance for you +1.
    • Financial Support for Life Events & Extended Parental Leave
    • Paid professional development courses and trainings
    • B2B contracts

       

    The recruitment process includes the next steps:

    1. HR Interview (30-45 min)

    2. Meeting with a Product Owner (60 min)

    3. Technical interview with live coding (90 min)

    4. Final Interview with CTO & Software Architect (60 min)

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  • Β· 39 views Β· 6 applications Β· 1d

    Middle Go Developers

    Full Remote Β· Ukraine Β· 3 years of experience Β· English - B1
    Good afternoon! We have open positions on our team for Middle Go Developers. We are looking for skilled specialists with strong experience in the following areas: Backend Development with Go: implementation of business logic, development and maintenance...

    Good afternoon!
    We have open positions on our team for Middle Go Developers. We are looking for skilled specialists with strong experience in the following areas:

    Backend Development with Go: implementation of business logic, development and maintenance of microservices, integration with external services, and working with databases.

     

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  • Β· 74 views Β· 10 applications Β· 1d

    Senior Full-Stack Engineer (Backend-Oriented, Node.js) to $7500

    Full Remote Β· Countries of Europe or Ukraine Β· 10 years of experience Β· English - B2
    Build the real-time AI governance control plane trusted by global enterprises Who we are: Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. ...

    Build the real-time AI governance control plane trusted by global enterprises

    Who we are:
    Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. 

     

    About the Product:

    You’ll work on a cloud-native AI governance platform designed to intercept, classify, and control high-velocity AI interactions in real time β€” without revealing the client’s identity.

    The platform analyzes user prompts, AI responses, coding-agent activity, and enterprise search outputs flowing across HTTP streams, IDE extensions, LLM APIs, and internal microservices. It applies need-to-know access filtering, policy transformations, and audit controls within sub-second decision windows, ensuring sensitive knowledge never crosses boundaries it shouldn’t. As enterprises adopt generative AI at scale, traditional access-control models break down. This product introduces a new security layer purpose-built for AI systems, enabling organizations to innovate quickly while maintaining strict governance over their data and models.

    You will be joining a core engineering team that is building a platform with real industry impact β€” one shaping how AI responsibly integrates into the modern enterprise.

     

    About the Role:

    We are looking for a Senior Full-Stack Engineer (Backend-focused) to join a small, high-caliber team developing the core components of this real-time governance system.

    Your primary focus will be backend engineering with Node.js/TypeScript β€” building high-performance services, scalable APIs, distributed processing flows, and policy-evaluation pipelines. When needed, you’ll contribute to the React-based frontend to deliver features end-to-end. You will take ownership of major technical decisions, collaborate with engineering, product, DevOps, and AI/security

     

    Why This Role Stands Out:

    • Mission-critical product defining how enterprises safely adopt AI
    • Deep engineering challenges β€” real-time pipelines, distributed flows, policy engines
    • Modern stack: Node.js, TypeScript, React, PostgreSQL, Docker, cloud-native tooling
    • High degree of autonomy and technical ownership
    • Work closely with an elite product and AI/security team
    • Fully remote, flexible environment with strong operational support

     

    What You Bring:

    • 10+ years of professional software development experience
    • 5+ years of hands-on experience with Node.js and TypeScript
    • Strong knowledge of backend architecture, distributed systems, and scalable service design
    • Proven experience working with SaaS-based systems
    • Experience with relational databases (PostgreSQL or similar)
    • Experience with containerized/cloud-native environments
    • Practical React experience sufficient for full-stack delivery
    • Deep understanding of JavaScript/TypeScript runtime patterns and performance considerations
    • Strong communication skills and comfort working asynchronously in a distributed team
    • Ability to thrive in a fast-paced, high-ownership environment
    • Excellent English (written and spoken)

     

    Nice to Have:

    • Experience with CI/CD pipelines (GitHub Actions or similar)
    • Experience with Python and/or Go
    • Production experience with large-scale TypeScript-based backend systems
    • Exposure to LLM/AI products (LLM APIs, vector DBs, orchestration frameworks)
    • Experience integrating ML/AI models into production systems
    • Background in B2B or security-focused products
    • BSc in Computer Science or related field

     

    Why Us?

    We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

    We provide full accounting and legal support in all countries we operate.

    We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

    We offer a highly competitive package with yearly performance and compensation reviews.

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