Jobs at Djinni

About the Role We're looking for a Manual QA Engineer to join our team and help us deliver high-quality products across multiple projects. You'll work closely with developers, designers, and project managers to make sure everything we ship works the way it should.

What You'll Do

• Design, write, and execute manual test cases and checklists
• Perform functional, regression, integration, and exploratory testing
• Report bugs clearly and track them through to resolution
• Verify fixes and ensure quality across releases
• Collaborate with developers and PMs in an Agile team
• Contribute to improving QA processes and documentation
• Participate in product discussions and help shape quality standards
   

What We're Looking For

• 1+ year of commercial experience in manual QA
• Solid understanding of software testing principles, methodologies, and SDLC
• Experience writing test cases, checklists, and bug reports
• Hands-on experience with bug tracking and test management tools (Jira, TestRail, or similar)
• API testing experience with Postman or similar tools
• Basic understanding of SQL and ability to write simple queries
• Familiarity with browser DevTools for frontend testing
• Knowledge of Agile methodologies (Scrum, Kanban)
• Experience working with AI tools and understanding of how they work
• English B2+ - both writing and speaking
• Ready to learn and grow
   

We Offer

• Remote work
• Flexible working schedule
• Friendly team and great atmosphere
• Interesting and varied projects

• Mentorship from experienced colleagues

   

Senior Individual Contributor · Onsite/Hybrid Contractor · Kraków, Poland
 

Project description (direct hire)

We're a small, technically driven team building automated trading infrastructure on Ethereum. Our system detects arbitrage opportunities, routes trades across multiple third-party venues, and submits transactions to block builders for inclusion within a single block.

We're not a pre-revenue experiment. We're profitable, backed by world-class investors, and funded by our own live trading operations. That gives us the freedom to focus on what actually matters: expanding our strategies, sharpening execution, and building infrastructure that holds up when real money is on the line.

About the role

We're looking for a senior engineer to share ownership of our core trading logic and infrastructure. This is a hands-on individual-contributor role — no managing tickets, no proxy work. You'll be equally at home writing high-performance Rust, debugging a bundle-inclusion failure on-chain, and shipping services to Kubernetes in production.

You'll work across the full lifecycle of a trade: opportunity detection and scoring → quote aggregation across multiple routers → bundle construction → submission to block builders. Because the system handles real money, correctness, safety, and reliability are non-negotiable. You'll also own the risk-management layer — the automated short circuits and kill switches that monitor P&L in real time and pull trading back when thresholds are breached.

If you think about failure modes, rollback plans, and kill switches before the first line of code, you'll fit in well here.
 

What you'll own

• Trading strategy & execution. Design and implement arbitrage detection, opportunity scoring, and execution logic inside a Rust actor architecture that processes every new block in real time.
• Liquidity routing. Build and maintain integrations with aggregator APIs and self-hosted routers — quote collection, comparison, and optimal route selection across multiple liquidity sources.
• MEV bundle construction. Build and submit bundles to block builders, optimizing for gas efficiency, inclusion probability, and profit extraction, while interacting with multisig wallets and custom smart contracts.
• Automated risk controls. Develop systems that monitor balances, detect anomalies, and autonomously scale trading deployments down via the Kubernetes API when something looks wrong.
• Production infrastructure. Operate and evolve the platform end-to-end: deploy to AWS EKS, manage multi-account environments with Terraform, build Grafana dashboards, query logs through Loki, and own production troubleshooting.
   

Our stack

Rust · tokio · revm / Foundry · alloy / ethers-rs · PostgreSQL · Kubernetes (EKS) · AWS · Terraform · Grafana · Loki · Solidity / Gnosis Safe
 

What we're looking for

• 5+ years of software engineering experience, with a track record on complex backend systems and real ownership of technical domains from concept to production.
• Strong, demonstrable Rust expertise — async, concurrent code with tokio, trait-based abstractions, solid error-handling patterns, and comfort in performance-sensitive code paths.
• A real understanding of Ethereum's architecture: transactions, blocks, gas mechanics, ERC-20s, DEX mechanics, and the MEV supply chain (searchers, builders, relays). You understand why things are designed the way they are, not just how to call them.
• Experience building or operating systems that handle real money or critical infrastructure — you reason about failure modes, monitoring, kill switches, and rollback as a default.
• PostgreSQL proficiency: writing and optimizing queries, designing schemas for high-throughput time-series data, and managing migrations.

Nice to have

• Prior MEV experience: Flashbots, block builders, bundle submission, or searcher-strategy development.
• Hands-on work with Rust Ethereum libraries (alloy, ethers-rs) or EVM simulation tools (revm, Foundry/Anvil).
• Production Kubernetes (EKS) and AWS experience — deployments, secrets management, VPC networking, Terraform.
• Smart-contract development (Solidity/Foundry), especially Gnosis Safe modules or DeFi protocol integrations.
• Familiarity with DEX aggregator APIs and the trade-offs between on-chain and off-chain routing.

Location & engagement

This is a long-term contractor / subcontractor engagement. The role is anchored in Kraków — ideally you're based there. We'll also consider strong candidates elsewhere in Poland who can travel to Kraków regularly (roughly once a month, for a few days). Several of our team members are already on the ground there.

Why this one's worth your time

Most "Web3 developer" roles are CRUD with a wallet connect button. This isn't that. You'll own a real data and execution plane, ship to production, and see the direct P&L impact of your code on a system that's already live and profitable — with the autonomy of a senior contributor and none of the big-company bureaucracy.

If that sounds like your kind of problem, get in touch and we'll share the deeper technical details and terms.

As a Senior Growth Analyst at Readdle, you'll own the numbers behind how Spark grows and proactively discover opportunities and validate the impact of initiatives. From the first ad impression to long-term renewals, you'll make sense of the data, design event structures, and ensure everything is measurable. You'll dig into funnels, uncover insights, and build dashboards that make growth performance crystal clear for product and marketing teams.

What will you do:

• Transform and analyze large datasets in BigQuery and Amplitude to discover product & growth opportunities, trends, anomalies, and actionable insights across the user journey.
• Build and maintain self-serve reports that enable stakeholders to answer key questions with data and establish a clear source-of-truth for growth metrics.
• Define, document, and QA event structures for new features, campaigns, and experiments; build a robust monetization measurement system to support pricing and migration decisions.
• Analyze user funnels across ads, store, onboarding, in-app usage, purchases, and cancellations to identify drop-offs and growth opportunities.
• Design, sequence, and monitor A/B experiments and feature launches; validate results and ensure statistical rigor & consistent long-term impact tracking.
• Proactively surface insights, hypotheses, and growth opportunities to marketing and product teams; shape quarterly prioritization with discoveries from data and impact scenarios to influence roadmap decisions.
• Build forecasting and scenario models for installs, conversions, retention, and revenue.
• Ensure data integrity across tools and pipelines through established QA processes; work with measurement vendors to meaningfully track attribution and optimize acquisition reporting.

About you:

• 5+ years in growth, product, or marketing analytics in a B2C or SaaS environment, with experience working on user acquisition, pricing, monetization, and/or migration initiatives in subscription-based products.
• Strong SQL skills and experience with BigQuery or similar cloud data warehouses (Redshift, Snowflake); proficiency in Tableau/Looker/etc. for reporting and complex data visualization and product analytics tooling. Amplitude/Mixpanel/Heap/Hotjar/PostHog for event/property tracking and user journey tracking.
• Experience with marketing attribution platforms (Appsflyer/Adjust/Kochava/etc.); familiarity with Python/R for data analysis and automation. Experience with ML or time-series inference is a strong plus.
• Solid understanding of product analytics (funnels, cohorts, retention, event tracking), marketing analytics (incl. attribution, MMM, incrementality testing, etc.), statistics, experimentation, and experience with segmentation and modeling churn or LTV. Demonstrable advanced analytics experience (causal inference, quasi-experiments, linear programming, econometrics, etc.) is highly advantageous for the role.
• Proven ability to design self-serve dashboards and act as a strategic thought partner to PM/PMM teams, not just an executor of analytics requests.
• Solid business acumen. Comfortable working cross-functionally with product, marketing, and engineering teams with a proactive, curious, and coachable mindset.
   

What you will get at Readdle:

• Customer-centric culture. We put our users at the heart of everything we do. Every team member has the opportunity to engage directly with customers, gaining insights that shape meaningful, delightful experiences for millions worldwide.
• Relentless growth. We’re committed to mastery in our craft. We take ownership of our work, decisions, and outcomes, and we see feedback as a catalyst for growth. Every challenge is an opportunity to learn, evolve, and raise the bar.
• Exceptional people, exceptional team. Our greatest strength is our people. We care deeply about each other, work transparently, and celebrate collective success. Together, we build an environment where everyone can do their best work and grow beyond their potential.
• Real impact. We design products that truly matter. Our focus is on delivering tangible value, simplifying complexity, pushing boundaries, and continuously improving how we build and deliver solutions to our users.
• Culture of innovation. We embrace curiosity and creativity in everything we do. Fresh ideas are not just welcomed, they’re expected, celebrated, and turned into real innovations that shape the future of our products and company.

ZentixSoft is looking for a Senior DevOps Engineer (AWS & Infrastructure as Code) 🛡️

At ZentixSoft, we follow the "People over processes" principle. We are expanding our cloud infrastructure and platform engineering direction for our strategic international partners.
 

Note: This is a high-visibility Outstaffing role.

Project Details: 
📍 Geographic Model: Hybrid (Full-time allocation. Candidates based in the EU / Pan-Baltic region are strongly preferred, as occasional local business trips across the Baltics may be required). ⏳ Contract Duration: Till Dec 31, 2026 + long-term extension. 
🚀 Start: ASAP.
 

The Role: You will own the infrastructure automation, CI/CD pipelines, and overall reliability of high-load, customer-facing communication environments. Your primary focus will be bridging the gap between development and platform security, driving root-cause analysis for production incidents, and enforcing top-tier DevOps standards across a regulated enterprise environment.

Our Expectations: 
🔹 Seniority Blueprint: 7+ years of proven commercial experience in DevOps, SRE, or Platform Engineering roles. 
🔹 Cloud & IaC Mastery: Heavy, deep-dive expertise in AWS ecosystems paired with Terraform and Terragrunt for Infrastructure as Code. 
🔹 Delivery Automation: Solid experience building, maintaining, and scaling enterprise-grade CI/CD pipelines. 
🔹 Production SRE: Exceptional troubleshooting instincts, live environment debugging, and incident management skills. 
🔹 Independence & Compliance: Proven ability to operate autonomously and make technical decisions within highly regulated architectures. 
🔹 Communication: Fluent English with the soft skills and stakeholder management capabilities required to align with global cross-functional teams. 
🔹Experience mentoring or guiding junior engineers
🔹 Nice to have:  Hands-on experience with Kubernetes, observability tools, Amazon Connect, or Contact Center/CRM platforms (like Salesforce).

Why ZentixSoft? 
💸 Compensation: Premium, competitive compensation package tailored to top-tier Senior engineering expertise. 
⚖️ Balance: Transparent workflows, zero micromanagement, and a focus on engineering stability. 
🦾 Trust: A high-autonomy culture where your architectural instincts and platform decisions are respected from day one.

We are looking for a Senior DevOps Engineer to join our client's engineering team in a long-term engagement. This is a fully remote, full-time role for someone who thrives on ownership, enjoys building reliable and scalable infrastructure from the ground up, and is passionate about enabling engineering teams to move fast without compromising security or stability.

This role is ideal for someone who enjoys autonomy, startup environments, and solving complex infrastructure challenges while working closely with experienced engineers in a high-trust, remote-first culture.

Key Responsibilities:

• Design, build, and maintain scalable cloud infrastructure on AWS
• Manage and evolve Kubernetes-based environments, ensuring reliability, performance, and security
• Own infrastructure as code practices using Terraform and drive improvements across provisioning workflows
• Develop and maintain robust CI/CD pipelines to streamline software delivery and reduce operational overhead
• Enhance observability across systems through monitoring, alerting, logging, and incident response practices
• Collaborate closely with software engineers to support application deployments and operational excellence
• Contribute to security best practices, access management, compliance initiatives, and disaster recovery planning
• Drive technical decisions around platform architecture, and long-term maintainability

• Support AI-related workloads and services operating under enterprise SLAs

   

Requirements:

• 7+ years of commercial experience in DevOps, Site Reliability Engineering, Platform Engineering, or related roles
• Strong hands-on experience with AWS and cloud-native infrastructure design
• Deep expertise in Kubernetes administration and production operations
• Advanced knowledge of Infrastructure as Code, particularly Terraform
• Solid experience building and maintaining CI/CD pipelines in modern engineering environments
• Ability to work independently, prioritise effectively, and deliver consistently within distributed teams
• AI-native engineering mindset, you actively leverage LLMs and AI tooling to improve productivity and engineering workflows
• Proven track record of taking ownership and delivering high-impact infrastructure initiatives

Nice to Have:

• Experience supporting AI/LLM infrastructure and workloads in production environments
• Familiarity with workflow orchestration platforms such as Temporal
• Experience in fintech, KYC/KYB, fraud prevention, or other regulated industries
• Background working in startup or scale-up environments with small, high-performing teams
• Experience implementing security and compliance frameworks within cloud environments
• Open-source contribution history

What We Offer:

• Fully remote, flexible work culture with long-term stability
• High-impact product work within an AI-native fintech company solving real-world problems
• Strong engineering standards and meaningful technical ownership, no micromanagement
• Opportunity to shape infrastructure strategy and influence key technical decisions
• Transparent, supportive team culture focused on trust and collaboration
• Competitive monthly compensation aligned with experience and contribution

How to Apply:

Send us a short intro about yourself and your relevant experience - and tell us your favourite ice cream flavour (ours is cherry🍒)

We are looking for an experienced L&D Manager who will take ownership of the learning and development function within our logistics operations.

This role is not about running training only — it’s about building, improving, and scaling a learning system that directly impacts team performance, operational efficiency, and business results.

We already have a foundation in place, and we’re looking for someone who can elevate it to the next level.

What You’ll Be Responsible For:

• Own and drive the L&D function for dispatch and customer support teams
• Improve and systematize existing training processes, making them scalable and measurable
• Design and implement end-to-end learning solutions (onboarding, upskilling, continuous development)
• Align learning initiatives with business goals and operational KPIs
• Expand training practices to new roles and departments over time
• Develop and maintain high-quality learning content (SOPs, playbooks, scripts, video training, knowledge base)
• Implement and manage performance-based learning approaches (assessments, certifications, post-training tracking)
• Build and supportIndividual Development Plans (IDPs)
• Partner with team leads and managers to identify skill gaps and development needs
• Analyze team performance and translate insights into actionable learning initiatives

• Ensure measurable impact of training on team performance and quality metrics

   

LMS & Learning Infrastructure (AcademyOcean):

• Own and develop the AcademyOcean learning platform
• Structure and optimize learning journeys for different roles
• Manage access, roles, and learning paths
• Track progress, engagement, and learning effectiveness
• Build reporting and analytics to support decision-making

• Continuously improve user experience and learning adoption

   

What We’re Looking For:

• 2+ years of experience in Learning & Development / Training roles
• Experience in logistics companies would be a plus
• Hands-on experience working with dispatch and support team training
• Strong understanding of logistics operations and workflows
• Experience in building or significantly improving L&D systems
• Ability to connect learning initiatives with business outcomes and KPIs
• Strong stakeholder management and communication skills
• Experience with LMS platforms (AcademyOcean or similar)
• Data-driven mindset and ability to measure training effectiveness

• English — Intermediate+ (confident enough to create training materials and collaborate with an international team)

   

Why This Role is Interesting:

• High level of ownership and autonomy in shaping the L&D function
• Direct impact on operational performance and team efficiency
• Opportunity to build and scale learning systems, not just maintain them
• Collaboration with operations and leadership teams

• Growth potential as the company expands

   

We Offer:

• Remote work format or office in Dnipro
• Opportunity to influence multiple business areas through L&D
• Dynamic, fast-growing logistics environment
• Сorporate events, trips and holidays — we are very active

Corefy is a Ukrainian PayTech IT company founded in 2016. Our SaaS platform, proudly made in Ukraine, serves as a technological hub for orchestrating online payments.

Collaborating with renowned payment providers like Stripe, Google Pay, Apple Pay, MasterCard, Visa, AWS, and more, we’ve implemented over 600 different payment methods and cater to clients worldwide.

We’re looking for a Customer Support Specialist who’s curious, calm, and not afraid of logs, APIs, or tricky client cases. If you like helping people, solving complex puzzles, and want to grow in FinTech — this might be your next step. 🚀

🎯 Who we’re looking for:

- Tech-savvy helper with 1+ year of experience in Customer/Technical Support.
- Clear communicator who knows how to keep clients calm and confident, even in stressful situations.
 - Structured thinker who enjoys breaking down problems and turning them into solutions.
 - Self-learner who’s comfortable exploring APIs, digging into logs, and writing SQL queries to find root causes.
 - Ownership taker who doesn’t wait for instructions, but takes charge of client issues until resolution.
 - FinTech explorer who’s interested in online payments and wants to dive deeper into the domain.

✨ Bonus points if you:

- Have experience working with tools like Postman, Grafana, Kibana, or Jira.
 - Have worked with international B2B clients or on 24/7 support schedules.
 - Know your way around large datasets and like working with SQL and dashboards.
 - Have taken QA, API, or other relevant tech courses.

💼 What you’ll do:

- Be the first line of support -  reply to client queries via Jira.
 - Help clients troubleshoot issues and guide them through product functionality.
- Analyze logs, run API calls, and check monitoring dashboards to find root causes.
 - Escalate bugs, edge cases, or unusual behavior to dev, QA, or integration teams.
 - Take part in incident management: monitor alerts, report outages, and support recovery.
 - Provide service support: from generating reports to setting up client dashboards.
 - Keep your teammates in the loop and improve support documentation along the way.
 

📌 Hiring process: HR Interview → Interview with the Support Team Lead → Interview with the Head of CS  → Offer 🎉
 

⭐ What we offer:
🔹 Growth & Ownership
- Salary in foreign currency + tax compensation.
- Clear growth paths & Corefy Academy to deepen your FinTech expertise.
- Bonus system based on SLA and quality metrics — up to +20% on top of your base salary.
- Reimbursement for external courses — we support your drive to grow.
 - Open-door policy with C-level — your ideas will be heard and valued.

🔹 Culture that Energises
- Meaningful work: you’ll tackle real cases, not just follow scripts.
- Regular team events — from fun celebrations to learning sessions.
- Friendly, supportive teammates who’ve always got your back.

🔹 Work Environment that Works for You
- Work where you feel productive: remotely or from our cozy Kyiv office.
- 8-hour shift schedule, 5 days a week, including occasional weekends (also night shifts on alert).
- 20 vacation days + 10 paid sick days.
- Mental wellness support — we cover sessions with a psychologist of your choice.
- Enjoy breakfast days at the office and everything you need for productive work — a generator, uninterrupted internet, and full tech freedom: choose between a MacBook or a Linux-based laptop.
 

Want to grow in FinTech and support great products for clients worldwide? Send us your CV — we’d love  to meet you! 📩

Job Title:  Principal Software Developer (C#)
Location: Galway, Ireland

Work model: Hybrid, 3 days in-office minimum; additional occasional/or regular in-office days may be required to support your team.
Relocation and visa sponsorship assistance are available for qualified successful candidates. 

Who We Are

At SOTI, we are committed to delivering best-in-class mobile and IoT device management solutions. We are looking for out-of-the-box thinkers that appreciate the art of creating great software.

To us, being visionary is more important than doing things the way they’ve always been done.  

What We’re Looking For

Our people are our most important resource. For us to continue to develop new innovations and achieve the impossible, we are looking for out-of-the-box thinkers that appreciate the art of creating great software. 

As a Principal Developer in the Location Services team, you will be responsible for defining and communicating the technical vision for the future architecture of the Signal and Location Services and other SOTI applications together with Software Architect. You are an excellent coder, helping development teams to make our vision a reality, designing and building low friction APIs, highly responsive web UIs and the backend to support them. This is an outstanding opportunity where you will be responsible for owning the overall architecture of the Location Services and their integration with the SOTI ONE platform. You are passionate about modern technology, and you are driven by your energy to identify and resolve complex problems with an aptitude for learning new technologies.

What’s in it for you?

The People - From our humble origins in our founder’s basement, to our industry leading position today, SOTI has worked hard to foster a company culture that we can all believe in. A culture that emphasizes personal growth, continuous innovation and fun.

The Growth - Our environment fosters new ideas, fresh perspectives, and the ability to take them over the goal line. SOTI is a fast-paced environment with a global reach that encourages you to make your mark and be part of something big!

The Technology - You’ll get the chance to work with leading edge technologies and take on complex and interesting projects, as part of highly collaborative and agile teams. You will work alongside SOTI’s partners which include leading tech giants that will keep you on the cusp of emerging technologies.

What You’ll Do

• Architectural design of SOTI’s products; hands-on code and design major components of the architecture, including APIs, services, user interface, and middleware
• Own and drive non-functional features (performance, security etc.) of the product, bring them from ideation to completion
• Advocate, document, and enforce best engineering practices, design and implementation principles, and coding standards; drive high quality in all phases of software development.
• Assist development teams with design review; suggest innovative solutions targeting large-scale performance, security, and fast delivery; develop prototypes and proof of concepts; enforce compliance with design and security.
• Identify technical debt; assist development teams with technical debt elimination.
• Collaborate with senior management, product, support, and other technical teams, collect requirements, define and communicate product technical strategy, architecture, and design.
• Create and maintain an architecture roadmap, principles, policies, and procedures, a repository of design artefacts (solution architecture, high- and low-level designs)
• Help in growing technical expertise in SOTI; mentor and educate developers as well as quality assurance specialists
• Proactively keep a tab on emerging technologies, evangelize and lead adoption throughout the teams
• Have fun, with all of the above!

Experience You’ll Bring

• Expertise in Computer Science with an excellent understanding of math, algorithms, data structures, design patterns and software architecture, and the ability to understand the logic behind the relationships within programs themselves. 
• 10+ years of combined experience architecting, designing, and implementing multi-tiered software applications
• Strong experience in programming languages such as .NET, JavaScript, Angular, Node JS, MVC etc.
• Excellent hands-on knowledge of relational data models, SQL (MS SQL server) and NoSQL Databases
• Excellent knowledge and experience with ElasticSearch
• Good knowledge of designing and deploying applications in AWS or Azure
• Good knowledge of CI/CD process and integration of SonarCube for code coverage
• Experience working on complex business problems and identification of technical solutions that are flexible and creative
• Highly proficient in software architecture patterns and documentation
• Problem-solving skills with attention to details
• Deep experience in agile software development life cycle, practices, and tools (coding standards, code reviews, source code management, build processes, QA)
• You are a self-starter with a high degree of initiative, a can-do attitude and a positive mindset
• Strong education in Computer Science/Math is preferred

About the SOTI Galway Office

Boasting our growing Research and Development team in Galway, Ireland, we are involved in groundbreaking mobility-focused research, to provide innovative mobile device solutions to our enterprise clients around the world. We are in the heart of Galway City next to the Cathedral and National University of Ireland Galway.

Known as a place of innovation and a growing technology hub, Galway is also an ideal place for families, while keeping young professionals entertained. Whether you are interested in the best restaurants, cozy pubs, festivals, fresh produce or the beautiful sights and landscapes, there is always something to do in Galway.

Enjoy fishing, surfing or hiking, take a day trip to the Aran Islands, or perhaps indulge in the rich cultural heritage and explore the many historical sites in the area. The city’s booming economy, great schools, significantly lower cost of living compared to Dublin, and fun and friendly atmosphere make Galway a great place to live and work.

Relocating from abroad?

Moving to a new country can be exciting and challenging. We have prepared a list of resources to ease your transition to Ireland, and our People & Culture Team will always be available to you for support. Visa sponsorship and relocation assistance are available to successful candidates.

You are a Computer Science expert with a strong understanding of advanced data structures, hashing mechanism, complexity of search, sorting, and you have a high-level knowledge of many sorting algorithms.

Being part of our growing RandD team involved in groundbreaking mobility focused research in the Mobile and IoT sectors, you will be provided with amazing opportunities to work on exciting projects that offer innovative mobile device solutions to our enterprise clients across the world.

What You’ll Do

- Take on research and development projects, break down into fundamental elements, explore potential technical paths and propose team approach for architecture and software development elements;

- Understand existing and future product technical challenges and identify solution paths for development; coaching the team along the technical path for optimal solution design;

- Develop innovative solutions to tackle big industry problems in the Mobile and IoT sectors;

- Actively contribute in brainstorming and idea generation activities, as well as participate in enhancing/maintaining existing solutions;

- Maintain high standards of quality for code, technical documentation, and deliverables;

- Define and implement best coding practices; proactively keep a tab on emerging technologies;

- Provide technical guidance on the research and development of new products and services;

- Work closely with the manager to ensure the product is evolving according to need;

- Write well designed, scalable, reliable, testable and reusable code by using best software development practices, clean code and solid principles;

- Contribute towards the entire development lifecycle of analysis, design, implementation and test;

- Detect, report, investigate, and fix product defects;

- Automation, including writing unit and integration tests;

- Collaborate on projects with an all-star team comprised of varying skillsets through code reviews and design discussions;

- Constantly update your knowledge and stay up-to-date with advanced technologies to be able to provide the best solutions for new projects, and

- Have fun, with all of the above!

Experience You’ll Bring

- 8+ years of hands-on experience in software development and solution design preferably with product companies;

- Proven track record of successfully making a positive impact as a tech visionary;

- Previous RandD experience would be a definite asset;

- You have incredible coding skills. Your programming abilities are way above average and you can engage in meaningful conversations about modern technology;

- You obsess over server scalability and robustness and your work reflects that;

- You are a Computer Science expert with a strong understanding of advanced data structures, hashing mechanism, complexity of search, sorting, and you have a high-level knowledge of many sorting algorithms;

- You are constantly investigating new technologies and introducing them into existing products;

- You possess a deep knowledge of Microsoft technology stack- .NET, .NET Core, ASP.NET Web API, SQL Server;

- You have a demonstrable versatility in various front-end and back-end technologies, ideally AngularJS 6 and above, RxJS and knowledge of Flus and Redux. Additionally, JavaScript, HTML5, CSS3, NodeJS, REST APIs, JSON, WCF, Web API, Unity, LINQ;

- You have excellent understanding of unit test principles, multi-layer architecture, SOA principles and best development practices, as well as previous experience using OOD, Design Patterns, Data Modelling and Storage with well-known relational database (preferably SQL);

- Understanding/or strong interest in agile methods such as Scrum/XP, Behavior Driven Development, and Continuous Delivery;

- You are eager to constantly learn and update your skills, and you like to share knowledge with others;

- You are a self-starter with a high degree of initiative, a can-do attitude and a positive mindset;

- Degree from an accredited college/university or equivalent work experience.

What’s in it for you?

The People - From our humble origins in our founder’s basement, to our industry leading position today, SOTI has worked hard to foster a company culture that we can all believe in. A culture that emphasizes personal growth, continuous innovation and fun.

The Growth - Our environment fosters new ideas, fresh perspectives, and the ability to take them over the goal line. SOTI is a fast-paced environment with a global reach that encourages you to make your mark and be part of something big!

The Technology - You’ll get the chance to work with leading edge technologies and take on complex and interesting projects, as part of highly collaborative and agile teams. You will work alongside SOTI’s partners which include leading tech giants that will keep you on the cusp of emerging technologies.

Requirements:

• Strong production experience with Vue.js
• Solid Python experience for backend development
• Proficiency with JavaScript / TypeScript for frontend development
• Hands-on experience with Three.js and Canvas-based rendering
• Demonstrable frontend performance optimization experience (page load time, rendering efficiency, working with large or real-time data sets)
• Ability to work highly autonomously, proactively clarify requirements and drive work forward with minimal supervision
• Strong communication skills and experience working in distributed teams (Europe/Ukraine time zone; ~1–2 hours of daily overlap with a US-based team)
• Hands-on experience with AI-assisted development tools — e.g. Claude Code and Codex — including AI skills, plugins, and MCP (Model Context Protocol), with a clear understanding of how to boost personal productivity and code quality using AI tooling

Nice-to-Have:

• React experience — a planned Vue → React migration is in scope for the team, so familiarity with both frameworks is a strong plus
• Hands-on experience migrating a frontend from Vue to React
• Experience rendering large, real-time data streams in the browser
• Familiarity with deck.gl and Leaflet
• WebGL experience beyond Three.js abstractions
• Familiarity with C++ or general backend development

Key Responsibilities:

• Build and maintain features across a portfolio of Vue-based projects
• Develop and support Python backend services
• Optimize frontend performance — faster page loads and more efficient rendering of heavy real-time 3D scenes and data
• Build and maintain visualization UI components that render synchronized 3D, lidar, and media data
• Contribute to the planned Vue → React migration as it ramps up
• Take ownership of features end-to-end, proactively clarifying requirements and assumptions
• Collaborate with a primarily US-based team with ~1–2 hours of daily overlap, while working largely independently
• Participate in code reviews and design discussions

About the Project:

You'll join the engineering team of a leading technology company building autonomous mobility and robotics systems. The team develops an internal data visualization platform — essentially a "video and data player" that renders a 3D scene, a lidar feed, and an audio feed in sync, used to inspect and debug the data recorded by autonomous vehicles.

The work centers on a set of Vue-based projects, including the platform itself and supporting Python backend services, with a Vue → React migration on the roadmap as the broader engineering organization standardizes on React. This is a long-term engagement for an engineer who is comfortable across the stack, cares about clean and performant code, and can drive features from design to production with high ownership and minimal supervision.

For our partners, we are currently looking for an experienced HR Director to join a fast-growing international company in the fintech industry.
 

📍 Location: Barcelona| Spain (office-based format)
🕒 Employment type: Full-time
🌍 English level: Upper-Intermediate / Advanced — mandatory
 

Key expectations:

• Building and scaling HR processes within a dynamic fintech environment
• Developing and implementing HR strategy aligned with business goals
• Managing recruitment, onboarding, performance management, and employee engagement processes
• Supporting leadership and department heads in people-related decisions
• Building strong corporate culture and internal communications
• Experience working in fast-paced international environments will be a strong advantage
   

Requirements:

• Proven experience in a senior HR leadership role (HRD / Head of HR / People Partner Lead)
• Experience in fintech, IT, crypto, payments, or related tech-driven industries
• Strong understanding of modern HR practices and people management
• Excellent communication and leadership skills
• High level of ownership and strategic thinking
• Fluent English is required for daily communication with international teams and partners
   

We are looking for someone proactive, business-oriented, and capable of building effective HR infrastructure in a scaling international company.

Why join us

If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :)

About the role

We are looking for a Middle/Senior Full Stack Engineer to build robust server-side solutions for a SaaS platform operating at scale, working across Java, React, SQL, Redis, and Elasticsearch. You will contribute to architecture decisions, design reusable client integration systems following secure cloud best practices, and participate in code reviews and CI/CD processes as a trusted technical resource for the team. The role offers significant ownership from day one in a product built from the ground up.

What you will do

• Build a cleanly designed, reusable client integration system adhering to secure cloud software best practices from start to finish;
• Collaborate with design and product teams to understand requirements, create estimates, plan sprints, and meet delivery timelines;
• Plan and accurately estimate construction and delivery timelines;
• Contribute to technical documentation and automated build and deployment processes designed to increase engineer efficiency;
• Review code submitted by other software engineers and submit your own code for review as part of the pull-request deployment process.

Must haves

• 4+ years’ experience of SaaS experience;
• High level of proficiency in Java, React, and SQL;
• Knowledge of or prior experience with microservices architecture;
• Front end experience with JavaScript, Typescript, and ReactJS;
• DevOps mindset of automation and continuous improvement;
• Good understanding of observability and familiarity with strong CI/CD practices;
• A proven ability to meet deadlines, motivate others, and consistently produce high quality, impactful results;
• Ability to maintain at least 6 hours of overlap with EST working hours;
• Upper-intermediate and higher English proficiency.

Nice to haves

• Experience building software in the cloud with AWS preferred.

The benefits of joining us

• Professional growth

Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps

• Competitive compensation

We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities

• A selection of exciting projects

Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands

• Flextime

Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive.

Meet Our Recruitment Process

Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback:

• Short online form to confirm basic requirements
• 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process.
• 5-minute introduction video

Synchronous stage – Live interviews

• Technical interview with our engineering team (scheduled at your convenience)
• Final interview with your future teammates

If it’s a match — you’ll get an offer!

Quintagroup is seeking a Senior Python Developer to join a leading European fintech product company.

Technology stack: Python 3.11, Django 4.2, Postgres, AWS (EventBridge, Lambda, ECS, RDS, DynamoDB etc.), Docker, Pandas, Polars, Terraform

RESPONSIBILITIES:

• development with Python, AWS
• participation in planning and execution stages
• communicate with international (UK/UA/US) development team and CTO 

REQUIREMENTS

• 5+ years of experience with Python
• Experience with AWS and Python frameworks
• Able to work in a team-oriented, collaborative environment
• Ability to share knowledge

Customer methodologies and tools

• Scrum (2 week sprints)

Senior Python Developer - Project tech stack:

• Python
• AWS

WE OFFER:

• Long term projects
• A company with a specialization in Python development for the last 22 years
• Health insurance
• Different work models (remote, office, or hybrid remote/office options)
• Projects in AWS, Azure, GCP
• Different domains of projects: FinTech, EdTech, GovTech, IoT, e-commerce, marketplaces, e-auctions, e-learning, public procurement, interesting tasks, possibilities for career and professional growth
• Friendly atmosphere and good working conditions
• regular team-buildings and corporate parties
• Online English classes
• Flexible working hours
• Experience with new technologies

Proffiz is looking for a Trainee/Junior Recruitment Specialist to join our dynamic team. In this role, you will support the recruitment process by sourcing and engaging candidates, conducting initial screenings, and coordinating interviews for IT positions across Ukraine and Poland. You will collaborate closely with hiring managers, understand market trends, and ensure a smooth candidate experience.

If you are passionate about recruitment, eager to learn about the IT market, and have strong communication skills, we'd love to hear from you!

Job Benefits

▪ Competitive compensation

▪ Sick and personal leave

▪ Flexible working hours

▪ Flexible working location (Remote/Office/Mixed)

▪ Technical equipment

▪ Professional development and regular Performance Appraisals

▪ Health Insurance

▪ English courses

▪ Corporate events, team-building activities, and so on

▪ Access to Zoho Recruit, LinkedIn Recruiter, and other professional tools

Job Requirements 

▪ 6+ months of experience in recruitment/sourcing or completed recruitment courses

▪ Basic understanding of the IT recruitment process and recruitment best practices

▪ Familiarity with ATS systems (Zoho Recruit will be a plus)

▪ Basic knowledge of the IT market and common technology roles

▪ Experience or practical skills in sourcing, CV screening, and conducting initial HR interviews

▪ Strong communication and interpersonal skills

▪ Ability to manage several vacancies simultaneously and work independently with guidance when needed

▪ Analytical mindset and willingness to learn market trends and salary benchmarks

▪ English level – at least Intermediate (Upper-Intermediate will be a plus)

Responsibilities

▪ Support the full-cycle recruitment process for Entry-Level, Junior, Middle and Senior positions

▪ Managing at least 1-2 closed vacancies per month 

▪ Source candidates using various platforms and tools

▪ Screen CVs and conduct initial HR interviews

▪ Prepare interview feedback and maintain candidate records in the ATS

▪ Coordinate interviews and communicate with candidates throughout the hiring process

▪ Collaborate with hiring managers and the HR team to understand hiring needs

▪ Maintain and expand the candidate database and talent pipeline

▪ Assist with market research and salary benchmarking for the IT industry

▪ Support onboarding activities for new hires

▪ Participate in internal HR projects, and corporate events

▪ Support the successful closure of the team's vacancies and contribute to recruitment targets.

Who we are 

Proffiz is a web and mobile software engineering company of dedicated professionals based in Ukraine and Poland. Throughout years of passionate work, we create software solutions for Fintech, Workforce, Print, Photo&Image and other industries. At Proffiz we strive to deliver top-quality of our work and are looking for exceptional talent to join us. If you are excited about the opportunity to collaborate and grow among passionate experts — we invite you to our team!

Ready, Steady, Go!)

N-iX is looking for a Senior QA Automation Engineer to lead the validation and verification strategies for EDGE Group’s AI transformation. You will be responsible for defining "what good looks like" for non-deterministic AI systems, ensuring that Large Language Models (LLMs) and predictive engines meet the strict reliability standards of the defense sector.

Qualifications

• 5+ years in QA Automation
• Experience testing data-driven systems, AI, or ML models
• Strong analytical skills for defining test criteria in non-deterministic systems
• Ability to collaborate with engineers, data scientists, and product teams
• Experience in regulated industries (defense, aerospace) will be a plus
• English level - at least Upper-Intermediate

Technical Requirements

• Strong experience in Python and test automation frameworks (Pytest, Selenium/Playwright, API testing)
• Experience with performance testing tools (JMeter, Locust, K6)
• Familiarity with LLM evaluation tools (e.g., DeepEval, TruLens)
• Knowledge of SQL and data validation tools
• Experience with CI/CD pipelines (GitLab) and version control (Git)
• Exposure to test reporting tools (Allure, TestRail)

Key Responsibilities

1. AI & LLM Testing

• Build automated tests to evaluate AI outputs for accuracy, consistency, and reliability
• Validate Retrieval-Augmented Generation (RAG) systems using metrics like relevance and correctness
• Create regression tests to detect changes in AI behavior (prompt drift)

2. System & Integration Testing

• Test integrations between AI systems and enterprise platforms (e.g., SAP)
• Perform API testing, including security and access control validation
• Design performance tests for latency, scalability, and system throughput

3. Quality & Governance

• Align test cases with system requirements and user needs
• Support release readiness through structured testing reviews
• Track and manage defects, ensuring traceability to data, models, or requirements

We offer*:

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

*not applicable for freelancers