Jobs Backend

PioGroup Software is a team of professionals passionate about building reliable digital products. We are looking for an experienced Strong Middle Blockchain Engineer with strong production experience working with the Bitcoin protocol and Bitcoin wallet/custody infrastructure.

The main focus of the role is developing and maintaining Bitcoin wallet infrastructure, including UTXO management, transaction construction and signing, PSBT, SegWit, multi-signature flows, fee management, and transaction lifecycle handling.

For this position, hands-on production experience specifically with the Bitcoin protocol is essential. General blockchain or Web3 experience alone is not sufficient.

Requirements

• 3+ years of production experience with Bitcoin / BTC infrastructure.
• Hands-on experience with Bitcoin-based protocols, UTXO model, PSBT, and BIP standards.
• Strong experience with Java, Spring Boot, and SQL.
• Experience working with production wallet or custody infrastructure.
• Good understanding of TDD and/or BDD practices.
• Familiarity with Domain-Driven Design principles.
• Experience working in a monorepo environment with shared libraries and coordinated CI/CD pipelines.
• Professional written and spoken English.
• Proactive communication and ability to raise blockers, technical concerns, and cross-team dependencies.

Bitcoin Protocol Expertise

We expect strong practical knowledge of:

• PSBT and BIP-174.
• UTXO management and coin selection.
• SegWit transaction structures.
• Bitcoin script types and descriptor formats.
• HD wallets and derivation paths.
• BIP-48 and BIP-67.
• P2WSH and multi-signature transaction flows.
• PSBT combination, signing, and finalisation.
• Witness data and BIP-143.
• DER signature encoding, low-S enforcement, and sighash types.
• UTXO indexing and balance calculation.
• Address discovery, gap limits, change address allocation, and address reuse prevention.

Transaction Lifecycle & Fee Management

Production experience with:

• Mempool monitoring.
• Fee estimation and fee-rate prediction.
• RBF (Replace-By-Fee).
• CPFP (Child-Pays-For-Parent).
• Stuck transaction detection.
• Transaction replacement and rebroadcasting.
• Confirmation monitoring.
• Double-spend detection.
• UTXO consolidation during low-fee periods.

Candidates should also clearly understand the operational difference between a transaction being:

• Broadcast.
• Accepted into the mempool.
• Confirmed.
• Confirmed at depth N.

A strong understanding of Bitcoin probabilistic finality, dust limits, fee spikes during network congestion, and the behaviour of unconfirmed transactions is also required.

Responsibilities

• Develop and maintain Bitcoin wallet infrastructure.
• Manage UTXOs and wallet balances.
• Construct Bitcoin transactions.
• Work with PSBT and SegWit.
• Implement multi-signature transaction flows.
• Handle fee estimation and fee bumping using RBF and CPFP.
• Monitor mempool activity and transaction lifecycle.
• Implement deposit detection and address-level balance monitoring.
• Support wallet recovery and descriptor-based address discovery.
• Participate in technical design and architecture decisions.
• Collaborate with other engineering squads and shared platform components.

Nice to Have

• Experience with multiple blockchain protocols.
• Experience with institutional-grade custody or wallet platforms.
• Experience working with systems processing high volumes of Bitcoin transactions.

Important: we are specifically looking for candidates with documented commercial experience working with the Bitcoin protocol, including UTXO management, PSBT, SegWit, BIP standards, and the Bitcoin transaction lifecycle. Testnet-only, personal wallet, or exclusively Ethereum/Web3 experience will not be sufficient for this role.

About SlotCatalog
 

SlotCatalog is a leading intelligence and data platform in the online casino industry. We serve both players and industry stakeholders by tracking slot games, providing performance insights, and managing large-scale structured data. The business is profitable and growing, with strong traction across both SEO and direct industry relationships. We are now expanding into regulated markets, direct media sales, and AI-powered tools. 
 

What We’re Looking For 

We are looking for a Senior PHP Developer who thinks in terms of architecture, ownership, and real production impact, not just task execution.
 

Role Overview

This role requires architecture-level thinking, responsibility for production systems, and the ability to make technical decisions that directly influence the product and business outcomes. 

You will work closely with Product, DevOps, and Data teams, taking ownership of backend services end-to-end: from design and implementation to release, monitoring, and long-term stability.

What You Will Do

• Design and evolve SlotCatalog’s PHP backend running in real production
• Own features and services end-to-end, including releases and post-release stability
• Make and defend technical and architectural decisions
• Translate business goals into scalable and maintainable technical solutions together with Product
• Improve system performance, reliability, and long-term maintainability
• Confidently read, debug, refactor, and modernize existing code
• Participate in deployments, incident handling, and production troubleshooting
• Contribute to architectural standards and best practices

Requirements

• 5+ years of PHP experience in production environments
• Strong knowledge of PHP 8+, OOP, SOLID principles, and design patterns
• Proven experience with Laravel and/or Symfony in large codebases
• Deep understanding of PostgreSQL / MySQL and relational data modeling
• Experience designing and maintaining REST APIs under real traffic
• Confident use of Git, code reviews, and responsibility for merged code
• Experience working with:
  • Linux environments
  • Docker
  • CI/CD pipelines
  • Practicable usage of admin panels builder filament (v.5)
• Ability to diagnose and resolve production issues under pressure

• English C1-C2 is a must

   

Strong Advantage

•  Experience with SEO-sensitive websites
•  Experience with CMS/admin platforms
•  Experience with high-traffic content or affiliate websites
•  Experience improving old systems without full rewrites

Ownership & Product Mindset

You are a good fit if you:

• Think in terms of outcomes, not just tasks
• Challenge requirements when they are unclear, risky, or inefficient
• Understand how technical decisions impact performance, SEO, data quality, and business metrics
• Are comfortable being fully accountable for what goes to production
• Care about system behavior after release, not only about implementation

Not a Fit If

• You need extremely detailed step-by-step tickets
• You avoid legacy or complex code
• You have never owned features after release
• You are not interested in production stability and real user impact

What We Offer
 

🎯 Autonomy & Impact
Take ownership of your projects and partnerships — your ideas will directly influence our global growth.

🏡 Remote & Flexible
Work from anywhere with a schedule that supports your productivity and work-life balance.

🌴 Time Off
Enjoy 28 paid vacation days plus an extra day off on your birthday.

🩺 Health & Recovery
Paid sick leave to support your well-being.

📚 Learning & Development
Access to English courses, internal knowledge resources, and professional development opportunities.

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Software Engineer (Python)!

Requirements:

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field;
• 5+ years of experience in software engineering;
• Strong proficiency in Python, with experience with other programming languages;
• Strong knowledge of concurrency, parallelism, and related concepts;
• Experience with back-end frameworks (FastAPI);
• Expertise in object-oriented programming and SOLID principles;
• Experience with RESTful APIs and microservices architecture;
• Proficiency in version control systems, particularly Git;
• Familiarity with CI/CD pipelines and DevOps practices;
• Strong understanding of database systems (both SQL and NoSQL);
• Experience with AWS services, cloud architecture, and Serverless development;
• Knowledge of containerization technologies (Docker, Kubernetes);
• Testing and quality mindset; understanding Test Pyramid methodology and different Test Categories;
• Understanding of Observability (structured logging, metrics, traces, OpenTelemetry) and Reliability (circuit breakers, backoff, idempotency)

Will be plus:

- Startup experience
- Experience with message brokers (e.g., NATS, Kafka, RabbitMQ);

Responsibilities:

• Develop and maintain robust, scalable web applications;
• Design and implement efficient High Load APIs;
• Ensure high performance and responsiveness of applications;
• Implement security measures and data protection in line with industry standards;
• Participate in code reviews and contribute to improving development practices;
• Troubleshoot, debug, and upgrade existing software;
• Write technical documentation and maintain system architecture diagrams;
• Stay updated with emerging technologies and industry trends.

Our benefits to you:

☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance, and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location 
 

We are looking for a Rust Developer to join an experienced engineering team working on institutional-grade crypto and blockchain infrastructure.

This is a highly technical, hands-on role focused on pure Rust systems development, cryptographic infrastructure, secure key management, and HSM integrations. You will work on security-sensitive systems where reliability, correctness, and deep engineering expertise are essential.

Responsibilities:

• Design and develop production-grade systems software in Rust.
• Build and maintain secure cryptographic services and infrastructure components.
• Develop hands-on integrations with Hardware Security Modules (HSMs) and vendor-specific APIs.
• Work with PKCS#11 and HSM-based cryptographic workflows.
• Integrate and support HSM platforms from vendors such as Thales, IBM, Utimaco, and Securosys.
• Design and implement secure key management and cryptographic workflows.
• Contribute to systems supporting institutional crypto and tokenized asset platforms.
• Troubleshoot complex low-level issues across application, cryptographic, and infrastructure layers.
• Participate in architecture design, technical decisions, and code reviews.
• Ensure high standards of security, reliability, performance, and maintainability.

• Collaborate with senior engineers and architects in a distributed international team.

   

Requirements:

• 4+ years of software engineering experience, with strong Senior / Staff-level ownership.
• Strong hands-on Rust development experience.
• Proven experience building systems-level software in pure Rust.
• Strong understanding of software architecture, concurrency, memory safety, and performance optimization.
• Hands-on experience integrating with HSM hardware and vendor-specific solutions.
• Experience with one or more of:
  • Thales
  • IBM
  • Utimaco
  • Securosys
  • PKCS#11
• Strong understanding of cryptographic systems and secure key management.
• Experience designing and implementing security-sensitive production systems.
• Relevant experience with institutional TradFi, digital assets, or tokenized asset platforms.
• Strong debugging, problem-solving, and system-design skills.

• Ability to work independently on complex technical problems and take ownership from design through production.

   

Nice-to-have:

• Experience with crypto custody, wallet infrastructure, or digital asset platforms.
• Knowledge of blockchain infrastructure and transaction processing.
• Experience with cryptographic libraries and protocols.
• Experience with secure enclaves, HSM clusters, or high-availability cryptographic services.

• Experience working in highly regulated financial environments.

   

What To Expect From Digicode?

• 🌎 Work from Anywhere: From an office, home, or travel continuously if that’s your thing. Everything we do is online. You’re all set as long as you’re in the same time zone as your project colleagues.
• 💼 Professional Development: We offer great career development opportunities in a growing company, international work environment, paid language classes, conference and education budget, & internal 42 Community training.
• 󰩔 Work-life Balance: We provide employees with 18+ paid vacation days and paid sick leave, a flexible schedule, medical insurance for employees and their children, and a monthly budget for things like a gym or pool membership.
• 🙌 Culture of Openness: We’re committed to fostering a community where everyone feels welcome, seen, and heard, with minimal bureaucracy, and flat organization structure.
  And, also, corporate gifts, corporate celebrations, free food & snacks, and play & relax rooms for those who visit the office.

• Our culture is unique, and we live by our beliefs and core values. For more information on what it’s like to work at Digicode, please take a look at our career page.

   

Did we attract your attention? Send your CV and let’s talk:)

*By submitting your resume, you automatically agree to the storage and processing of your personal data in accordance with the current legislation of Ukraine. We guarantee confidentiality at all stages of cooperation.

Stellar Logic specializes in custom IT solutions for international clients. We help businesses build internal systems and enterprise software that power their operations — from complex business logic to full-scale automation.

We’re looking for a hands-on Team Lead / Senior Full-stack .NET Developer to join an existing engineering team and help strengthen technical ownership, delivery clarity, and client communication.

This role is for someone who enjoys staying close to the code, but also wants to influence technical decisions, guide other developers, improve engineering standards, and act as a reliable technical point of contact.

What You’ll Do

Hands-on Development: Build and improve backend and frontend parts of the system using .NET / C# and Angular.

Technical Leadership: Take ownership of technical decisions, code quality, implementation approaches, and engineering standards.

Team Coordination: Support planning, estimation, task decomposition, code reviews, and technical alignment within the team.

Architecture: Participate in system design, distributed architecture, integrations, scalability, and maintainability improvements.

Cloud & Infrastructure: Work with cloud environments, Kubernetes, CI/CD, and infrastructure-related tasks.

Client Communication: Communicate directly with the client on technical topics, clarify requirements, explain risks, and propose solutions.

Mentoring & Support: Help developers of different seniority levels through technical guidance, knowledge sharing, and practical support.

What We’re Looking For

Must-have:

• 5+ years of commercial software development experience
• Strong hands-on experience with .NET / C#
• Practical experience with Angular
• Experience with APIs, integrations, backend services, and complex business logic
• Experience with relational and/or NoSQL databases, ideally PostgreSQL and/or MongoDB
• Understanding of distributed systems, scalability, maintainability, and technical trade-offs
• Experience with cloud environments, preferably Azure and/or AWS
• Understanding of CI/CD processes and modern development workflows
• Previous experience as a Team Lead, Tech Lead, Lead Engineer, or in a role with similar technical responsibility
• English B2+ for direct communication with international clients
• Ownership mindset: ability to take responsibility for technical decisions, delivery risks, and the final result

Will be a plus:

• Experience with Kubernetes, Azure DevOps, Terraform / ARM / CloudFormation
• Experience with retail, e-commerce, logistics, supply chain, pricing systems, or internal enterprise systems
• Experience working in outsourcing / outstaffing or another client-facing environment
• Experience mentoring developers or coordinating a small engineering team

Why Work with Us?

🛠 Built around custom solutions
At Stellar Logic, we work on systems shaped around real business processes, not templates. Our projects often involve complex logic, integrations, internal workflows, and product decisions that require thoughtful engineering.

🎯 Small teams, meaningful ownership
You won’t be one of many people in a large structure. We work in focused teams where each person has visible impact, takes ownership of their part, and can influence both technical and product decisions.

⭐ Quality over quick fixes
We care about building software that is clear, reliable, and maintainable. Good engineering for us means understanding the problem, thinking through the solution, and delivering work that the team can build on.

🤝 Close collaboration with clients and teams
Our work requires direct communication, trust, and context. You’ll collaborate closely with people who care about the result — from engineers and designers to business stakeholders.

🚀 Room to grow with responsibility
Growth at Stellar Logic comes through ownership: taking on more complex tasks, leading initiatives, improving processes, mentoring others, or deepening your technical expertise.

What We Offer

Remote-first cooperation: Work from anywhere while staying connected with your team and international clients.

Flexible working hours: We value autonomy and trust, with core meetings for team and client alignment.

Paid vacation and sick leave: We support a healthy balance between work, rest, and personal life.

Tax and accounting support: We help with the administrative side so you can focus on your work.

Professional development: We support learning, certifications, and growth within your role.

Long-term collaboration: We aim to build stable cooperation, transparent communication, and a working environment where people can do their best work.

Not Meeting Every Skill?

Don’t worry if you don’t match every single requirement.
If your experience is close to what we’re looking for, you enjoy solving complex problems, and you’re ready to take ownership, we’d still be happy to talk.

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Team Lead GO to join our team!

Requirements:

- 3+ years of development experience with Go;

- Strong time management and organisational skills;

- Ability to design and implement scalable and reliable software solutions;

- Excellent problem-solving skills;

Git, GitLab, GitLab CI;

- Experience with multiple databases (RDBMS, NoSQL, Redis) and messaging services (Kafka, NATS), ideally run in a cloud environment;

- Strong system design skills;

REST/RPC transports;

- Practical knowledge of containers (Docker, Kubernetes);

- Experience with microservices design and development;

- Understanding of the importance of a well-organised codebase and documentation;

- Strong analytical skills and an open-minded, creative team player mindset;

- English: Upper-Intermediate.

Will be plus:

- Understanding of event-driven architecture;

- Understanding of Twelve-Factor App methodology;

CloudEvents;

- Experience working with cloud services (GCP/AWS);

- GitOps;

- Terraform;

- Helm/ArgoCD;

- Grafana/Tempo/Loki + Prometheus;

- High-load systems;

- Experience coordinating complex third-party dependencies.

Soft Skills

- Responsibility;

- Sociability;

- Proactivity;

- Self-organization.
 

Responsibilities:

- A Team Lead is the day-to-day technical coordinator of a specific team, acting as the execution arm of the EM and ensuring that the team is focused, unblocked, and working efficiently toward shared goals.

- They ensure smooth operation, coordination, and quality within the team, while escalating architectural, technical, or people matters to the EM.

- They are accountable for team delivery, individual growth, and operational excellence within their scope.

Technical Leadership, Ownership & Support:

- Own the day-to-day technical execution within the team, from new features to bug fixes and quality improvements.

- Ensure the team's code quality through reviews and enforcement of best practices (testing, security, maintainability). 

- Drive code reviews, enforce coding standards, promote testing and documentation, and help the team write robust, production-ready code.

- Support and contribute to hands-on coding and testing. Lead by example through hands-on development, particularly for complex or critical features.

- Own delivery of team components and backend capabilities as defined in sprint goals.

- Facilitate design discussions within the team; escalate complex architecture topics to EM or Architect.

- Raise and track technical debt; provide input to the EM for prioritization.

- Facilitate task prioritization, workload balancing, and sprint planning. - Track progress, identify risks, and resolve blockers.

Planning & Delivery Coordination:

- Ensure alignment with PMs, QA, DevOps, and BAs on deliverables. 
- Work closely with PMs, EMs, QAs, and BAs to ensure that deliverables are clearly understood, scoped, and assigned.

- Break down work items into deliverable tasks in collaboration with PMs and EMs, balancing workload fairly across developers and helping manage priorities during sprints.

- Actively participate in sprint planning, stand-ups, and retrospectives.

Monitor team progress and adjust scope or priorities when needed, escalating blockers to the EM.

- Maintain transparency on delivery status and keep stakeholders informed of changes, delays, or challenges.

- Coordinate hand-offs and dependencies within the team and with adjacent teams.

People Leadership & Development:

- Directly manage engineers on the team (Juniors, Middles, Seniors).

- Conduct 1:1s, performance evaluations, career growth discussions, and coaching.

- Provide day-to-day mentoring and guidance to developers, especially junior and mid-level engineers, by answering questions, sharing context, and offering feedback.

- Foster a positive and inclusive team culture; ensure psychological safety, motivation, and team morale.

- Participate in team growth activities, including hiring, interviewing, candidate evaluation, and onboarding of new engineers.

- Identify talent and growth opportunities; support professional development. 

- Partner with EM and Domain Lead to hire, onboard, and retain high-quality engineers.

- Encourage a sense of ownership and pride in the team's work; celebrate wins and learn from failures together.

Communication & Reporting:

- Keep EM and PM informed of team progress, risks, and dependencies.

- Share updates from EM or domain leads with the team.

- Act as the go-to person for team-level updates in cross-team syncs or sprint reviews.

- Participate in cross-team discussions to ensure alignment with domain strategy and priorities.

Success Criteria:

- The team consistently delivers on commitments with high quality.

Engineers are growing in skills and autonomy.

- The team operates efficiently, collaborates effectively, and maintains a healthy culture.

- Stakeholders trust the team for delivery, transparency, and problem-solving.

Our benefits to you:
☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location

🚀 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:

We are building and scaling a mature, data-intensive B2B SaaS platform used by enterprise customers across multiple markets. The platform supports a diverse range of enterprise use cases across operational planning, information analysis, case management, and cross-team collaboration.

The product brings together large volumes of structured and unstructured data, domain-specific analytics, and configurable workflows to help users investigate complex cases, collaborate effectively, and make timely operational decisions.

About the Role:

We are looking for a Senior AI Engineer to design, build, and deliver reliable AI-powered capabilities as part of an established production platform.
You will work at the intersection of backend engineering, generative AI, and product development. Your responsibilities will cover the full delivery cycle - from exploring ideas and validating technical approaches to building production services, evaluating output quality, and improving solutions based on real-world usage.
This is a hands-on engineering role with significant ownership. You will have the opportunity to influence architectural decisions, engineering practices, and the broader adoption of AI across the product while working closely with engineering, product, and other cross-functional teams.

📍 Key Responsibilities:

• Design, build, and deploy production-grade AI applications using LLMs, RAG, and agentic workflows.
• Build and optimize autonomous AI agents capable of planning, using tools, making decisions, and solving complex operational tasks.
• Build and operate LLM-powered product features, covering retrieval, orchestration, tool use, quality assessment, and production monitoring.
• Develop methods and tooling for assessing AI quality, diagnosing failures, monitoring behavior, and improving performance over time.
• Build scalable Python backend services and integrate AI capabilities with distributed production systems.
• Collaborate with data and product teams to productionize new AI capabilities, taking them from experimentation to reliable real-world use.
• Own technical decisions and drive AI engineering best practices and engineering standards for building, testing, releasing, and maintaining AI-enabled software.

📍 Required Competence and Skills:

• 7+ years of software engineering experience with 1.5 years of hands-on experience building production AI applications, with proven experience delivering agentic AI systems used by real users.
• Strong software engineering background in Python or another backend language (Golang, Java, Rust, etc.), with the willingness to work primarily with Python. 
• Hands-on experience building agentic AI systems using frameworks such as LangChain, LangGraph, or similar.
• Experience deploying and operating production AI services in cloud environments, with a proven track record designing scalable, event-driven architectures using cloud messaging technologies and SQL or NoSQL databases. Experience with AWS is an advantage.
• Experience connecting AI services to existing backend systems and application interfaces.
• Experience taking AI applications from development to production and collaborating with platform engineering teams on deployment and operation.
• Experience ensuring production AI systems are reliable, secure, observable, and ready for mission-critical use, including monitoring and incident response.
• Excellent communication skills, autonomy, and accountability in ambiguous, high-velocity environments.

Nice to Have:

• Experience with React.js and full-stack development, with the ability to contribute to frontend development when needed.
• Experience with vector databases and similarity search in production AI applications.

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.

We are looking for a Python Software Engineer - Autonomous Systems to join our autonomous systems control team.

This role is a strong fit for an engineer who is comfortable with mathematics, and is interested in growing into control engineering for autonomous systems.

We consider engineers at Middle+ level.

Responsibilities:

• Develop and maintain control and decision-making algorithms for autonomous guidance
• Perform testing in simulation environment and in real life
• Analyze system behavior and logs
• Navigate through research papers and algorithm descriptions in field of autonomous systems and apply them in practice

Required qualifications:

• 3+ years of software development experience in ML, robotics, simulation, gamedev or other algorithmically intensive domains
• Strong programming skills in Python and C++
• Hands on experience with concurrent and parallel programming
• Mathematical background, including: linear algebra (vectors and matrices, coordinat systems and transformations) calculus (derivatives and integrals)

Would be an advantage:

• Control theory fundamentals
• Olympiad programming
• Signal processing
• Machine Learning
• Mavlink
• Simulation tools (Gazebo, AirSim)
• ITL, HITL testing
• X4, Betaflight, ArduPilot

What We Offer:

• Opportunity to work on cutting-edge embedded products
• Competitive salary and benefits
• Flexible working model (remote / hybrid / onsite)
• Professional growth and learning opportunities
• Collaborative and engineering-focused culture

About us:
Farsight Vision develops AI-powered geospatial intelligence solutions for defence and security operations. The platform transforms raw aerial and sensor data into real-time 3D environments, actionable analytics, and AI-assisted operational scenarios, enabling enhanced situational awareness, mission planning, and faster decision-making for both human operators and autonomous systems. We operate at the intersection of geospatial data, computer vision, and defense operations – and if that interests you, read on.

Responsibilities:
- Design, develop, and deploy production-ready computer vision algorithms for image and video analysis in GIS-related applications
- Build end-to-end perception pipelines – data collection, preprocessing, model development, deployment, and monitoring
- Integrate CV components into operational products in close collaboration with cross-functional engineering teams
- Optimize algorithms for performance, reliability, and scalability in real-time and resource-constrained environments
- Develop and deploy Visual Place Recognition (VPR) systems for geo-localization and scene understanding tasks
- Implement and optimize CV algorithms on embedded and hardware-accelerated platforms, ensuring stable and efficient inference at the edge
- Process and analyze large-scale datasets for model training, validation, and continuous improvement
- Diagnose and resolve complex issues across computer vision applications in production
- Contribute to internal research, exploring emerging techniques in image synthesis, manipulation, and applied ML.

Requirements:
- Expert-level Python – this is our primary engineering language. You must be comfortable writing clean, efficient, production-quality Python code
- 5+ years of hands-on experience in computer vision and applied machine learning
- Deep working knowledge of core CV and ML libraries: OpenCV, PyTorch, TensorFlow, and related tooling
- Solid understanding of machine learning, deep learning, and model development workflows end-to-end
- Hands-on experience with Visual Place Recognition (VPR) algorithms and techniques, including descriptor-based retrieval, sequence matching, and localization under varying conditions
- Proven ability to port, optimize, and run CV/ML models on embedded devices and edge hardware (e.g., NVIDIA Jetson, Raspberry Pi, or similar platforms)
- Proven experience with image processing, model training, and evaluation methodologies
- Ability to translate research into reliable engineering outputs with minimal supervision
Bachelor's or Master's degree in Computer Science, Artificial Intelligence, or a related field – or equivalent demonstrable experience
- Strong analytical thinking and clear communication in a cross-cultural, fast-moving team.

Would be a plus:
- Experience with graphics APIs: OpenGL, OpenGLES, or Direct3D
- Background in graphical algorithms, 3D rendering, or computational geometry
- Familiarity with embedded systems or hardware-accelerated proces

About Us

Smart Capital Center is an end-to-end, AI-powered platform for Commercial Real Estate (CRE) investment and financial management. We power real-time underwriting, asset management, and portfolio analytics through a combination of live data, workflow automation, and AI-driven insights.

Operating at the intersection of Generative AI, finance, and real estate, we are building systems that digitize and simplify complex financial workflows.

Our clients include leading institutions such as JLL, Pacific Life Insurance Company, and KeyBank. We are a lean, high-performance team building category-defining technology in a $17 trillion industry.

To learn more about our platform and vision, please visit our website.

The Role

We are looking for a Backend Software Engineer with strong experience in building scalable systems and a deep interest in AI-powered applications.

This is a high-impact, hands-on role where you will design and build backend services, integrate AI capabilities, and develop intelligent, agent-driven workflows used in real-world production environments.

You will work closely with product, AI, and engineering teams to deliver reliable, high-performance systems and automation features.

What You Will Do

Backend Development

• Design, build, and maintain backend services using Java (Spring Boot) and Python
• Develop scalable APIs and microservices for data-intensive applications
• Optimize system performance, reliability, and scalability
• Design efficient data models and handle complex integrations

AI & Intelligent Systems

• Implement and integrate AI-powered features into core products
• Design and build agent-based workflows for automation and decision-making
• Apply prompt engineering techniques to improve LLM outputs and behavior
• Work with modern AI frameworks to productionize intelligent systems

Cloud & Infrastructure

• Develop and deploy backend systems on AWS (EC2, S3, RDS, Lambda, etc.)
• Build resilient, scalable cloud-native services
• Contribute to system monitoring, logging, and reliability

System Design & Engineering Excellence

• Contribute to architecture, service boundaries, and system design decisions
• Write clean, maintainable, and well-documented code
• Ensure security, performance, and operational stability
• Continuously improve engineering quality and development practices

Collaboration

• Work closely with frontend, product, and AI teams
• Contribute to end-to-end feature delivery
• Participate in Agile development processes

Requirements

• 5+ years of backend software development experience
• Strong experience building and scaling backend systems in production

Core Technical Skills

• Strong experience with Java and Spring Boot
• Solid experience with Python
• Strong knowledge of SQL and database design (PostgreSQL preferred)
• Experience building REST APIs, microservices, and distributed systems
• Hands-on experience with AWS (EC2, S3, RDS, Lambda, etc.)
• Proficiency with Git and modern development workflows

AI & Modern Development Experience

• Experience with prompt engineering for LLM-based systems
• Practical experience building AI agent workflows in production
• Familiarity with frameworks/tools such as:
  • LangGraph
  • LangChain
  • LangSmith
  • or similar ecosystems
• Experience using AI-assisted development tools, such as:
  • Claude Code
  • Codex
  • OpenCode
  • or similar

Nice to Have

• Experience with vector databases or semantic search (e.g., Milvus)
• Knowledge of RAG (Retrieval-Augmented Generation) architectures
• Experience with CI/CD pipelines and DevOps practices
• Familiarity with event-driven architecture

• Experience with data processing pipelines or document AI systems

   

Why Join Us

• Work on cutting-edge AI-powered systems in a $17T industry
• Build real-world applications using LLMs, agents, and automation
• High ownership and autonomy with meaningful technical impact
• Opportunity to influence system design and engineering direction
• Fast-moving, execution-focused team with minimal bureaucracy
• Competitive compensation and flexible work environment

About Our Client

Our client is a leading enterprise data platform company building an open, high-performance data lakehouse for AI and analytical workloads. The platform combines an intelligent SQL query engine, an AI-ready semantic layer, and an open catalog built on Apache Iceberg — enabling Fortune 500 companies across finance, energy, manufacturing, and logistics to unify, query, and govern data at massive scale across cloud and on-premise sources.

About the Role

We are looking for a Senior Software Engineer for the data catalog and enterprise data management layer of a large-scale lakehouse platform — the services that automate data ingestion and autonomously optimize Apache Iceberg tables. You will own features through the full development cycle, from design through deployment, in a multithreaded, distributed environment where scalability, performance, and always-on availability are the baseline expectations.

This is a systems-level, backend engineering role focused on data infrastructure internals — not application development or CRUD services.

Responsibilities

• Own the full software development cycle — inception, design, development, testing, deployment — for catalog and data-management services
• Build and operate services for automated ingestion and autonomous optimization of Apache Iceberg tables
• Reason about concurrency and parallelization to deliver scalability and performance in multithreaded, distributed systems
• Drive performance tuning and system-efficiency improvements
• Work with Apache Foundation open-source projects, contributing upstream where agreed
• Participate in code and design reviews, upholding a high engineering bar
• Collaborate with product managers, support teams, and solution architects on feature requests and design updates
• Partner with US-based engineering leads on technical decisions

Required Qualifications

• B.S., M.S., or PhD in Computer Science or a related field
• 5+ years of software engineering experience, preferably focused on database systems or related fields
• Strong object-oriented programming skills in Java or C++
• Solid grounding in data structures and algorithms
• Hands-on experience with multithreaded and asynchronous programming patterns for scalable, performant systems
• A passion for engineering quality — zero-downtime upgrades, availability, resiliency, and uptime as first-class concerns
• Comfort with a fast-moving environment; strong ownership; the confidence to defend a technical position and the openness to be mentored
• Comfortable with AI-assisted development workflows — using modern AI tools productively while critically validating their output
• English Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team
• Availability to work EU business hours shifted 2–3 hours later for daily overlap with US West Coast mornings

Desired Skills

• Database internals and query planning
• Distributed systems: concurrency control, data replication, storage systems
• Apache Iceberg or other open table formats (Delta Lake, Hudi)
• Messaging systems: Kafka, NATS, or cloud pub/sub services
• Contributions to open-source data infrastructure (Apache projects especially valued)

Details

• Engagement: Long-term contract
• Location: Europe (EU / EEA / UK), remote
• Working hours: EU business hours, shifted 2–3 hours later for daily overlap with the US West Coast team

KoralX is looking for a talented .NET Developer to join our growing team. If you're passionate about building modern CRM systems and enjoy working on a real product used by international clients — we'd love to meet you.

Responsibilities

— Develop and maintain web applications using Blazor (Server or WebAssembly)
— Design and build REST APIs with ASP.NET Core
— Work with databases: schema design, query writing, and optimization
— Integrate with external services (APIs, Azure services, etc.)
— Implement business logic and complex forms (similar to CRM workflows)
— Develop reusable UI components in Blazor (DevExpress)
— Write unit and integration tests

Requirements

— Experience with .NET (C#, ASP.NET Core)
— Hands-on experience with Blazor (Server or WebAssembly)
— Strong understanding of OOP, SOLID principles, and design patterns
— Experience building RESTful APIs (JSON, HTTP)
— Experience with Entity Framework Core or other ORMs
— Solid SQL knowledge (SQL Server / PostgreSQL)
— Understanding of Dependency Injection
— Experience with Git
— Understanding of asynchronous programming (async/await)
— Basic knowledge of HTML and CSS

Nice to Have

— Experience with Azure (App Services, Functions, Storage)
— Knowledge of Docker / containerization
— Experience with SignalR (real-time features)
— Understanding of CI/CD (GitHub Actions / Azure DevOps)
— Experience with Microservices architecture
— Experience integrating with CRM/ERP systems
— Familiarity with frontend frameworks (React / Angular as a plus)

Developing a cloud-based platform designed for managing latest generation of IoT devices.

The core part of the system provides a centralized location for remotely monitoring, upgrading, and configuring devices. It also offers an application marketplace, allowing users to deploy and customize applications for their devices.

At the moment it is extensively extending with services that deal with telemetry provided by the connected devices and services. These services are designed in two forms. First is the predefined set of data connectors and visualization widgets, and the second is a framework that let customers to design own connectors and widgets.
Working in Scrum team and perform function of senior software developer doing software modules architecture, design, development, unit and integration testing and deployment.

Job Description

Primary Backend Skills:

• Framework: Deep expertise in the .NET 8 Framework, specifically for building Web APIs.
• API Development: Solid experience creating and managing endpoints using GraphQL for .NET.
• Data Access: Proficiency with Entity Framework for ORM.
• Testing: Skills in writing unit tests for backend services using XUnit.
• API Documentation: Experience using Swashbuckle to generate and maintain Swagger documentation.

Cloud & DevOps Experience:

• Platform: In-depth knowledge of the Azure platform is required.
• Containerization: Experience with Docker for creating and managing containerized applications. 
• Hands-on experience deploying microservices to Azure Container Apps.
• Understanding of hosting frontend applications on Azure Static Web App.
• Experience managing and interacting with Azure SQL Database.
  Experience with NoSQL databases, specifically Cosmos DB.
• Core Azure Services: Managing customer identity with Azure AD B2C, Using Application Insights for service monitoring, Experience with Azure API Management.

Preferred, Not Required Skills

Familiarity with our modern frontend stack is a strong plus. This includes: 

• Core Technologies: React, Typescript, and Material UI. State Management & Data: Redux toolkit and Apollo Client for GraphQL.
• Tooling: Experience with Vite as a build tool, Vitest for testing, and Zod for schema validation.
• Navigation: Understanding of React Router.
• Version Control: Proficiency with Git and GitHub.
• Collaboration: Experience working with Jira and Confluence.
• API Testing: Hands-on experience with Postman, particularly within a team workspace.
• Development Environment: Experience with development tools like Eslint, Prettify (Prettier), and Husky is beneficial. While the choice of IDE is flexible, experience with
  Visual Studio Code is preferred.
  
   

FTE: Full-time (40 h per week)
Timeline: 3-6 months (tbd)
Start: ASAP
English: B2

Recruitment process: a tech check with our client, then an interview with the main client

The company
A well-established B2D (business-to-developer) SaaS platform operating at significant scale. Their product is infrastructure-level - real-time connectivity used by developers worldwide.

The team
~6–7 people: tech lead, PM, delivery manager, 3 web engineers + contractors. Small, tight-knit, opinionated. Standups Monday and Friday.

The role
One senior hire. This is a product-minded engineering role, not ticket execution. They’re shifting away from reactive delivery toward engineers who understand customers and drive outcomes.

Tech stack
= React + TypeScript (frontend), Ruby on Rails (backend), some Node/TS services, Postgres.

What they’re looking for
- Developer empathy - you build tools for developers, you get the frustrations firsthand
- Product thinking - question requirements, propose what should be built
- Ownership - concept to shipped with minimal hand-holding
- Proactive communicator
- Comfortable with AI coding assistants (they use them actively)
- Design + UX intuition

Blackthorn Vision is seeking a Middle Strong/Senior Backend Developer (Node.js) for an outstaff project with a global leader in energy technology. Founded in 1926 and headquartered in Houston, Texas, the company has 100,000 employees serving customers in more than 120 countries and develops software solutions for automation across the energy and industrial sectors.

You will work as part of an international team, collaborating with Blackthorn Vision specialists, client-side engineers, and management. We are looking for a self-driven team player with strong problem-solving skills, a commitment to quality, and a passion for delivering robust and maintainable software solutions. Upper-Intermediate English or higher is required for effective day-to-day communication. The position follows a regular full-time working schedule aligned with the Ukrainian time zone.

In this role, you will build and support backend services that process operational and time-series data and deliver reliable APIs and event-driven solutions. You will work with technologies such as Kafka, Azure IoT Hub, RabbitMQ, Redis, Kubernetes, and Microsoft Azure to develop high-performance, resilient, and scalable applications.

Required Qualifications:

• 4+ years of professional software development experience.
• Strong hands-on experience with Node.js and TypeScript.
• Basic experience with Java and Spring Boot.
• Experience with Microservices Architecture, Event-Driven Architecture, and REST APIs.
• Strong understanding of system architecture and business requirements.
• Hands-on experience with Kafka and RabbitMQ.
• Experience with PostgreSQL, Cassandra, Redis, or similar relational/NoSQL databases.
• Experience with Docker, Kubernetes, Microsoft Azure, and Azure IoT Hub.
• Experience with CI/CD, DevOps practices, and modern observability tools.
• Experience using AI-assisted development tools such as GitHub Copilot, Microsoft Copilot, Cursor, or similar.

• Excellent problem-solving, communication, and collaboration skills.

   

Nice to have:

• Experience working with operational and time-series data.

• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field.

   

We Offer:

• Exciting and challenging work in a friendly and professional environment.
• Excellent career opportunities and competitive salary.
• Flexible work schedule.
• Professional development program with internal seminars on technical topics.
• Courses, certifications, and access to the corporate library.
• Free English classes.
• 18 working days of paid vacation, 5 full-paid sick leave days, paid public holidays.
• Medical insurance.
• Maternity leave.
• IT club membership.
• Employee referral program.
• Recognition program with gifts and awards.
• Pet-friendly and eco-friendly.
• Direct and easy communication with management.