Jobs at Djinni

About the Company

We are a fast-growing international FinTech company providing payment solutions to businesses across multiple markets.

As the company continues its growth journey, we are looking for a Chief Financial Officer (CFO) who will help build a strong financial foundation for the business and prepare the company for its next stage of development.

This role is ideal for a finance leader who enjoys building systems, improving financial visibility, supporting business decisions, and creating scalable financial processes in a fast-growing environment.

Role Mission

Build a modern finance function that enables sustainable growth, supports strategic decision-making, and creates the financial structure required for the company's future evolution into an international group of businesses.

The CFO will act as a strategic partner to the CEO, helping transform finance from a reporting function into one of the key drivers of business growth.

Key Responsibilities

• Lead and develop the company's finance function across all core financial areas.
• Build budgeting, forecasting, and financial planning processes.
• Develop management reporting that provides clear visibility into business performance.
• Design financial KPIs and dashboards for executives and department leaders.
• Improve cash flow management, liquidity planning, and financial forecasting.
• Support business planning through financial modelling and commercial analysis.
• Establish scalable financial processes and internal controls.
• Standardize financial operations across multiple legal entities.
• Partner closely with Operations, Product, Sales, Compliance, Legal, and other departments to support business decisions.
• Support the CEO in evaluating new business initiatives and growth opportunities.
• Build relationships with banks, payment providers, auditors, and external financial partners.
• Identify financial risks and recommend practical solutions.
• Develop and mentor the finance team while building a culture of accountability and continuous improvement.
• Help prepare the company for future expansion into a group structure.

Requirements

• 7+ years of experience in Finance, FP&A, Corporate Finance, Financial Management, or similar functions.
• 3+ years of experience in senior finance leadership roles such as CFO, Finance Director, Head of Finance, or equivalent.
• Proven experience building or improving finance processes in a growing business.
• Strong expertise in budgeting, forecasting, financial planning, and management reporting.
• Experience implementing financial controls and performance management frameworks.
• Strong understanding of cash flow management and business finance.
• Experience working with multiple legal entities is considered a strong advantage.
• Experience in FinTech, Payments, SaaS, Technology, E-commerce, or other high-growth industries is highly desirable.
• Strong analytical thinking and commercial mindset.
• Ability to communicate financial information clearly to non-financial stakeholders.
• Hands-on leadership style with the ability to balance strategic thinking and operational execution.
• Fluent English.

Success in the First 90 Days

• Gain a deep understanding of the company's financial structure and business model.
• Implement or improve executive financial reporting.
• Establish budgeting and forecasting processes where needed.
• Create clear financial KPIs and management dashboards.
• Improve visibility of cash flow and financial performance.
• Identify key financial risks and recommend improvement initiatives.
• Build effective collaboration with department heads and executive leadership.
• Present a financial roadmap supporting the company's next stage of growth.

What We Are Looking For

We are not looking for a traditional accountant focused only on reporting.

We are looking for a finance leader who enjoys building systems, improving business visibility, and helping leadership make better decisions through data.

The ideal candidate combines strategic thinking with a hands-on approach, understands the realities of growing businesses, and is excited by the opportunity to help shape the financial future of a company preparing for significant international growth.

The gist

We’re looking for designers who build.

AI tools have changed what one designer can do. Today, a designer can take an idea all the way to a working result instead of stopping at a Figma file.

That’s the kind of person we’re looking for.

You’ll join our Growth team, helping turn ideas and growth requests into working projects. You’ll work across products in education, lifestyle, entertainment, and AI, building fast prototypes, validating ideas, and shipping experiments.

What matters most isn’t your title. It’s what you can produce.

What you’ll do

• Take an idea or growth request and turn it into a working project.
• Build fast prototypes using AI-first tools such as Figma Make, Claude Design, or similar.
• Move between UI, UX, motion, and light front-end work depending on what the project needs.
• Turn requirements into wireframes and working prototypes.
• Generate visuals to support your designs.
• Prototype and iterate quickly, using AI to move faster.

• Work across different products as part of the Growth team.

   

You’ll probably click with this if you...

• Can code your own designs — or get close with AI tools.
• Add animations at the code level.
• Turn requirements directly into wireframes.
• Generate the visuals your designs need.
• Use LLMs every day — Claude Code, Codex, Cursor, or similar — and know how to get the most out of them.
• Enjoy experimenting with new AI workflows and tools.

Bonus: you’ve built your own pet projects from start to finish.

What we’re looking for

We’re interested in people who like building.

AI tools continue to change how products are designed and shipped. We want someone who embraces that change and uses AI to move from concept to working result as quickly as possible.

We care less about how you’ve traditionally worked, and more about what you’re capable of creating today.

How to apply

A portfolio is required.

Show us something you’ve built or significantly improved using AI. We want to see the range of what you can produce and how AI fits into your workflow.

Pet projects and experiments are very welcome.

We offer:

You will be working with a professional and motivated team of enthusiasts in the environment that brings up the best in everyone. We have no bureaucracy, and we give our colleagues complete freedom to make decisions and achieve brilliant results.

Our company is built on the ability to find the best people and provide them with everything needed to stay focused on what’s important to make our users even healthier, sportier, happier and better! We create a business environment that brings up the best in everyone.

Competitive salary. Compensation that will help you focus on your projects and personal development.

Professional Growth. We offer a possibility to attend internal, external courses, seminars and access to a corporate library. You will be working with a team of professionals to get insights and discuss ideas.

Health & Fitness. We provide employees with 20 days of paid vacation, medical insurance and a variety of sports activities available for employees inside and outside the office.

Rest. We organize team buildings and various team activities to boost our collaboration.

We’re expanding our team and looking for an experienced TikTok Media Buyer to join us.

We're looking for someone who knows how to build, optimize, and scale profitable TikTok campaigns in the iGaming vertical. If you're already managing daily budgets of $1,000+, have recent gambling experience, and understand how to drive volume across different GEOs — we'd love to connect.

We are a fast-moving team with quick decision-making, zero unnecessary bureaucracy, and a strong focus on performance and growth.

What’s important for us:

• Hands-on experience in iGaming / Gambling;
• Strong expertise in TikTok Ads;
• Experience working with spend-based deals;
• Current daily spend of $1,000+;
• Proven and active TikTok gambling cases within the last 3 months;
 

What we offer:

• Competitive base salary + performance-based bonus system;
• All resources and tools required for launching and scaling campaigns;
• Fully remote work format;
• Freedom in decision-making without micromanagement;
• Direct communication and fast implementation of ideas;
• Opportunity to grow into a Team Lead role.

About us:

• 80+ people in the in-house team;
• Fast-paced environment with direct communication and no unnecessary bureaucracy;
• Focused exclusively on the iGaming vertical and long-term growth.

If you have strong TikTok experience in gambling, know how to scale campaigns profitably, and want to be part of a team where your expertise directly impacts growth — we'd love to hear from you.

We’re expanding our team and looking for an experienced In-App Media Buyer to join us.

We’re looking for someone who is already working with a spend-based model, manages daily budgets of $1,000+, and knows how to buy and scale In-App traffic across multiple GEOs.

We are a fast-moving team with quick decision-making, zero unnecessary bureaucracy, and a strong focus on results.

What’s important for us:

• Hands-on experience in iGaming / Gambling;
• Strong expertise in In-App traffic acquisition;
• Practical experience with Unity Ads and Moloco;
• Experience working with spend-based deals;
• Current daily spend of $1,000+;
• Strong understanding of campaign optimization and scaling strategies;
• Proven and active gambling cases within the last 3 months;
 

What we offer:

• Competitive base salary + performance-based bonus system;
• All resources and tools required for launching and scaling campaigns;
• Fully remote work format;
• Freedom in decision-making without micromanagement;
• Opportunity to grow into a Team Lead role.

About us:

• 80+ people in the in-house team;
• Fast-paced environment with direct communication and no unnecessary bureaucracy.

If you have solid experience buying and scaling In-App traffic in the gambling vertical, are confident working with Unity Ads and Moloco, and know how to manage budgets efficiently, we'd love to hear from you.

We’re expanding our team and looking for an experienced Facebook Media Buyer to join us.

We’re looking for someone who is already working with a spend-based model, manages daily budgets of $1,000+, and knows how to buy and scale Facebook traffic across multiple GEOs.

We are a fast-moving team with quick decision-making, zero unnecessary bureaucracy, and a strong focus on results.

What’s important for us:

• Hands-on experience in iGaming / Gambling;
• Strong expertise in Facebook Ads;
• Experience working with spend-based deals;
• Current daily spend of $1,000+;
• Strong understanding of campaign optimization and scaling strategies;
• Proven and active Facebook gambling cases within the last 3 months.

What we offer:

• Competitive base salary + performance-based bonus system;
• All resources and tools required for launching and scaling campaigns;
• Fully remote work format;
• Freedom in decision-making without micromanagement;
• Opportunity to grow into a Team Lead role.

About us:

• 80+ people in the in-house team;
• Fast-paced environment with direct communication and no unnecessary bureaucracy.

If you have solid gambling experience, know how to manage budgets efficiently, and can scale Facebook campaigns profitably, we'd love to hear from you.

Senior Full-Stack Developer (Kotlin / Java / React)
EU only (business trip to Germany for 3–4 days every 6 months)

We&;re looking for a strong Senior Full-Stack Developer to join an enterprise project for one of our long-term clients. We already have several developers successfully working on this project.

Project

A web-based platform for German leasing companies that supports and automates their core business processes.

Requirements
 

6+ years of software development experience
Strong Kotlin & Java
Strong React
Experience with PostgreSQL and/or MongoDB
CI/CD & automated testing
Experience with AI-assisted development
Strong software engineering and problem-solving skills
⭐️ Nice to have
Node.js

 Responsibilities
Develop and enhance full-stack applications
Build scalable backend services with Kotlin & Java
Develop modern React features
Improve architecture and optimize existing modules
Collaborate with Product, QA, and DevOps teams
Participate in code reviews

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

We're building a completely new product – Tiger Finder, an AI-powered influencer discovery platform – and looking for a Product Lead who'll lead the product and play a key role in shaping its future.

This isn't a traditional product role where you inherit roadmaps and spend your days writing tickets. You'll own the product roadmap and day-to-day product decisions, work directly with customers, and be responsible for making Tiger Finder better every week.

You'll collaborate closely with the company's founder and CEO on the long-term vision, while having the autonomy to make product decisions yourself. This is an opportunity to lead an early-stage product where your decisions will have a direct impact on the product, the business, and our customers.

We're looking for someone with a strong product mindset and an entrepreneurial spirit. Someone who enjoys talking to customers, spotting opportunities, validating ideas, and turning them into product capabilities people love.

You'll work with an experienced and highly motivated team that's building an exciting product from the ground up.

Responsibilities

• Own the product roadmap and prioritize what gets built next.
• Talk to customers and users to deeply understand their needs, workflows, and pain points.
• Turn insights into clear product priorities, requirements, and experiments.
• Work closely with designers and engineers to ship valuable features quickly.
• Analyze product usage and business metrics to guide product decisions.
• Optimize the entire self-serve user journey, from onboarding and activation to conversion, retention, and monetization.
• Work closely with Marketing and CS to improve product-led growth.
• Regularly interview customers and prospects to validate ideas, gather feedback, and identify new opportunities.
• Represent Tiger Finder in customer calls, product demos, and industry conversations to continuously learn from the market.
• Stay on top of trends in influencer marketing, creator economy, AI, and competing products.

Requirements

• 3+ years of Product Manager, Product Lead, or similar product leadership experience in SaaS companies. Your most recent experience should be in a product company or startup.
• Experience leading product-led growth (PLG) initiatives for self-serve SaaS products.
• Proven experience optimizing self-serve SaaS funnels, including acquisition, activation, conversion, retention, and monetization.
• Experience conducting customer interviews and usability testing.
• Fluent spoken and written English. You'll regularly interview customers, run product demos, and collaborate with international partners.
• Strong analytical skills and confidence in making data-driven decisions.
• Strong communication skills and the ability to align designers, engineers, marketers, and other stakeholders around product priorities.
• Experience partnering with marketing teams to optimize user acquisition, activation, and conversion for self-serve SaaS products.
• Good understanding of SaaS marketing channels, attribution, and growth tools.
• High ownership and a proactive, self-starter attitude.
• Ability to balance customer value, business impact, and engineering effort when making prioritization decisions.
• Entrepreneurial mindset with willingness to experiment, learn, and adapt.
• Based in Kyiv (or Kyiv region).
• Experience in the martech space is a strong plus.

Hands-on experience with

• Amplitude for product analytics.
• Google Analytics (GA4).
• Intercom for customer communication and product feedback.
• Stripe, including subscription plans, trials, billing flows, and payment-related conversion optimization.

Recruitment process

• Interview with our Head of Talent Acquisition.
• Interview with our founder and CEO.
• Product case study.
• Reference check.

Perks

• Flexible work options with some in-office days.
• Four-day workweek in summer.
• Unlimited paid time off.
• Medical insurance.
• Professional growth and development supported by the company.
• Work with a dynamic, highly engaged, and friendly team.
• Strong company culture where we encourage experiments, mistakes, and learning.

Join a team developing an enterprise-grade agentic AI platform that leverages AI agents, tools, skills, and orchestration capabilities to automate cybersecurity and business processes. The project involves building and enhancing modern GenAI solutions using technologies such as Python, Azure, RAG, MCP integrations, CI/CD, observability, and scalable cloud-native architectures. You will work on designing, developing, and industrializing advanced agent-based AI applications, contributing to new use cases, integrations, security features, and platform evolution.

Responsibilities

Design, develop, and maintain full-stack applications using Python, FastAPI, and React.

Build and enhance Agentic AI solutions leveraging LLMs, LangChain, LangGraph, and AI orchestration frameworks.

Develop backend services, APIs, and integrations with external systems and AI tools.

Design and optimize data models and queries in PostgreSQL.

Implement caching, session management, and performance optimization using Redis.

Collaborate with architects, DevOps engineers, and product stakeholders to deliver scalable solutions.

Ensure code quality through testing, code reviews, and adherence to engineering best practices.

Contribute to system observability, monitoring, troubleshooting, and platform reliability.

Participate in solution design and technical leadership.

Support CI/CD processes and cloud-native application deployment.

Skills

Must have

7+ years of professional software development experience.

Strong expertise in Python and modern backend development.

Experience with FastAPI and RESTful API design.

Strong frontend development experience with React.js.

Hands-on experience building Agentic AI applications.

Practical experience with LLMs (OpenAI, Azure OpenAI, Anthropic, or similar), LangChain, LangGraph, Langfuse.

Strong knowledge of PostgreSQL.

Experience with Redis.

Understanding of software architecture, design patterns, and scalable distributed systems.

Experience with Git, CI/CD pipelines, and modern development practices.

Good communication skills and ability to work in an international environment.

English: B2 or higher.

Nice to have

Experience with security testing, application security, or secure coding practices (preferred).

Experience with Azure cloud services.

Experience with RAG (Retrieval-Augmented Generation) architectures.

Knowledge of Docker, Kubernetes, and cloud-native deployments.

Exposure to cybersecurity, vulnerability management, or enterprise security platforms.

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.
 

Why this role exists:

As a Senior Full-Stack .NET Engineer, you will play a critical role in designing, developing, and maintaining enterprise-level applications across our backend stack based on .NET, Node.js, Go and related technologies. You will lead technical discussions, mentor junior team members, and collaborate with cross-functional teams to deliver scalable and robust software solutions that meet business requirements and industry standards. This role offers the opportunity to make a significant impact, shape product direction, and contribute to the growth and success of the team.
 

What you’ll drive:

Architecture & Execution

• Design and implement scalable, efficient, and secure enterprise-level software architectures across our .NET stack.
• Write, test, and debug complex code for high-load systems with strict latency and reliability requirements.
• Deliver clean code to production in a timely manner, balancing business speed with technical excellence.
• Identify and eliminate performance bottlenecks across CPU, memory, I/O, and database layers.

Engineering Quality & Observability

• Conduct thorough code reviews to enforce strict code quality, security, and industry best practices.
• Develop and enforce testing protocols to guarantee software reliability and flawless production performance.
• Implement and monitor production observability frameworks, including logging, metrics, monitoring, and distributed tracing.
• Create and maintain concise, meaningful technical documentation for system designs and architecture.

Collaboration & Leadership

• Provide guidance and mentorship to junior and mid-level engineers, actively fostering their technical growth.
• Partner with Delivery Managers to lead and manage software development projects, ensuring predictable, high-quality delivery.
• Collaborate closely with product management, design, and operations teams to align technical execution with business goals.
• Communicate effectively with stakeholders, translating complex technical concepts into clear project updates.
   

What makes you a GR8 fit:

• Minimum 5 years of experience in a similar senior engineering role with a track record of leadership, strong technical skills, and successful project delivery.
• Deep hands-on expertise in C# and .NET (Core / .NET 6+).
• Commercial experience or a strong willingness to learn and work with Golang and Node.js.
• Experience designing and evolving high-load backend systems with strict latency and reliability requirements.
• Experience working REST API and web services.
• Strong understanding of async/await, multithreading, thread safety, memory management, and performance optimization.
• Ability to identify and eliminate performance bottlenecks across CPU, memory, I/O, and database layers.
• Experience designing and operating microservice-based systems.
• Experience working with relational and non-relational databases.
• Understanding of transactions, isolation levels, locking, concurrency, indexing strategies, and performance tuning.
• Experience working with containerized environments including Docker and Kubernetes.
• Understanding of CI/CD pipelines and automated delivery.
• Understanding of scalability, load balancing, auto-scaling, and disaster recovery.
• Understanding of production observability including logging, metrics, monitoring, and tracing.
   

Why you’ll love working here: 

Benefits Cafeteria — annual budget you allocate to:

Sports • Medical • Mental health • Home office • Languages.

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.
   

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.

Join a project where scalable backend engineering meets modern AI-driven financial technology. We are looking for a Senior / Principal Python Engineer to help build and evolve high-load payment and revenue systems used by businesses worldwide.

You will work on cloud-native backend services, distributed systems, and payment infrastructure while collaborating with Product, Frontend, AI, and Engineering teams. This role is ideal for engineers who enjoy solving complex technical challenges, influencing architecture decisions, and driving engineering excellence.

We at Sigma Software value technical ownership, collaboration, and continuous learning. You will join an international environment where innovation, modern technologies, and professional growth are part of everyday work.

Customer

Our Customer is a global SaaS company developing an AI-native revenue platform for modern finance and accounting teams. The company provides subscription management, billing automation, and revenue operations solutions that help organizations optimize financial workflows, improve scalability, and streamline transaction management across complex business ecosystems.

Requirements

• 5+ years of professional Back-end software engineering experience using Python
• Solid experience designing and building RESTful APIs and distributed backend systems
• Strong knowledge of SQL and/or NoSQL databases
• Hands-on experience with AWS cloud services
• Experience with Docker and Kubernetes
• Understanding of scalable cloud-native architectures and microservices principles
• Experience working in cross-functional Agile teams
• Strong problem-solving, communication, and collaboration skills
• Ability to drive technical initiatives and contribute to architectural decisions
• Upper-Intermediate or higher English level

WILL BE A PLUS:

• Experience with FastAPI and TypeScript
• Experience building AI-powered user experiences or integrating AI/LLM services into Front-end applications
• Hands-on experience with AI technologies and LLM ecosystems
• Experience integrating OpenAI, Anthropic, or similar AI services
• Experience working with AI SDKs and prompt-based applications

Responsibilities

• Design, develop, and maintain scalable backend services and APIs for cloud-native applications
• Build and optimize distributed systems, payment processing pipelines, and backend infrastructure
• Ensure high availability, security, scalability, and performance of backend systems
• Participate in architecture discussions and contribute to technical strategy and decision-making
• Collaborate with Product, Frontend, AI, and DevOps teams to deliver high-quality solutions
• Mentor engineers through code reviews, technical guidance, and engineering best practices
• Troubleshoot complex production issues and drive continuous improvements
• Contribute to AI-powered product capabilities and AI/ML-driven initiatives
• Promote engineering excellence, observability, and maintainability across services and infrastructure

Приєднуйся до проєкту, де масштабна Back-end розробка поєднується із сучасними AI-рішеннями у сфері фінансових технологій. Ми шукаємо Senior / Principal Python Engineer, який допоможе розвивати високонавантажені платіжні та revenue-системи, якими користуються компанії по всьому світу.

Ти працюватимеш із cloud-native сервісами, розподіленими системами та платіжною інфраструктурою, тісно співпрацюючи з Product, Front-end, AI та Engineering командами. Ця роль ідеально підійде інженерам, яким подобається вирішувати складні технічні задачі, впливати на архітектурні рішення та вдосконалювати технологічні підходи.

У Sigma Software ми цінуємо відповідальність за технічні рішення, командну взаємодію та безперервний професійний розвиток. На тебе чекає міжнародне середовище, де інновації, сучасні технології та можливості для навчання й професійного зростання є невід'ємною частиною щоденної роботи.

Customer

Наш клієнт — глобальна SaaS-компанія, яка розробляє AI-native платформу для управління доходами (Revenue Platform) для сучасних фінансових і бухгалтерських команд. Її рішення охоплюють управління підписками, автоматизацію білінгу та оптимізацію фінансових операцій (Revenue Operations), допомагаючи компаніям ефективніше керувати фінансовими процесами, масштабувати бізнес і спрощувати обробку транзакцій у складних корпоративних екосистемах.

Requirements

• Від 5 років комерційного досвіду в Back-end розробці з використанням Python
• Практичний досвід проєктування та розробки RESTful API і розподілених Back-end систем
• Глибокі знання SQL та/або NoSQL баз даних
• Практичний досвід роботи з хмарними сервісами AWS
• Досвід використання Docker і Kubernetes
• Розуміння принципів побудови масштабованих cloud-native та мікросервісних архітектур
• Досвід роботи в кросфункціональних Agile-командах
• Розвинені навички вирішення технічних проблем, ефективної комунікації та командної взаємодії
• Здатність брати технічне лідерство та впливати на архітектурні рішення
• Англійська мова — Upper-Intermediate або вище

WILL BE A PLUS

• Досвід роботи з FastAPI та TypeScript
• Досвід створення AI-функціональності для користувацьких застосунків або інтеграції AI/LLM-сервісів
• Практичний досвід роботи з сучасними AI-технологіями та LLM-екосистемами
• Досвід інтеграції OpenAI, Anthropic або аналогічних AI-сервісів

• Досвід роботи з AI SDK та застосунками, що використовують prompt engineering

   

Responsibilities

• Проєктувати, розробляти та підтримувати масштабовані Back-end сервіси й API для cloud-native застосунків
• Розробляти та оптимізувати розподілені системи, платіжні конвеєри (payment pipelines) і Back-end інфраструктуру
• Забезпечувати високу доступність, безпеку, продуктивність і масштабованість сервісів
• Брати участь у формуванні архітектурних рішень і технічної стратегії продукту
• Тісно співпрацювати з Product, Front-end, AI та DevOps командами для створення якісних і надійних рішень
• Проводити code review, менторити інших інженерів і ділитися найкращими інженерними практиками
• Аналізувати й вирішувати складні інциденти в production-середовищі, а також ініціювати технічні вдосконалення
• Долучатися до розвитку AI-функціональності продукту та AI/ML-ініціатив
• Розвивати інженерну культуру, покращувати спостережуваність (observability), надійність і простоту підтримки сервісів та інфраструктури

We are looking for a Lead .Net Full-Stack Engineer (with Angular or React) to join a dedicated delivery team working on a high-visibility engagement with a US-based payments technology company undergoing a strategic carve-out into a standalone business entity.
The platform processes card payments end-to-end for thousands of institutional customers and includes multiple production-grade .NET applications, such as a central payment gateway, a registration platform with an encrypted card vault, an AWS-native ticketing and point-of-sale solution, and a large commerce application with a single-tenant database model.

This is a fast-paced, security-focused modernization initiative with a hard 3-month delivery window. The team is responsible for performing security remediation, upgrading legacy frameworks and dependencies, and supporting the separation of Azure and AWS environments into an independent infrastructure landscape. The role offers direct exposure to CTO-level stakeholders and the possibility of continuing into a longer-term platform re-architecture phase.

Responsibilities:

• Remediate security findings across ASP.NET applications (MVC, Web API, Razor Pages), including issues related to secrets management, cryptography, token handling, injection vulnerabilities, and sensitive-data logging.
• Upgrade legacy .NET Framework applications to supported versions and migrate components to .NET 6+/8 where feasible.
• Modernize and stabilize frontend dependencies across Angular, React, TypeScript, and Telerik/Kendo UI codebases.
• Investigate and reverse-engineer brownfield systems, including legacy components, to understand data flows and payment-processing logic.
• Collaborate closely with the client’s retained engineering team, working effectively even in areas with limited documentation or SME coverage.
• Contribute to validation and retest activities by preparing evidence packages, deployment logs, and before/after remediation artifacts.
• Support CI/CD-driven delivery and ensure changes are shipped with appropriate testing, QA validation, and rollback procedures.
• Participate in technical discussions around future platform modernization and integration initiatives.

Requirements:

• 6+ years of professional experience in .NET development on large-scale production systems.
• Strong expertise in C# and ASP.NET (MVC, Web API, Razor Pages).
• Hands-on experience working with both .NET Framework 4.5.x-era applications and .NET 6+/8 modernization or migration efforts.
• Solid experience with Entity Framework / EF Core.
• Strong frontend skills with Angular, React, and TypeScript.
• Proven experience working on brownfield or legacy modernization projects.
• Practical experience remediating security vulnerabilities and applying secure coding practices (OWASP-related issues, secrets handling, cryptography, authentication/session management).
• Ability to work independently in complex, partially documented environments.
• Upper-Intermediate English (B2+) or higher.

Nice to have:

• Experience in payments, fintech, PCI DSS, or other security-sensitive domains.
• Experience with Azure PaaS services (App Services, Functions, Service Bus, Cosmos DB).
• Experience with AWS services (Lambda, S3, SNS/SQS).
• Familiarity with Azure AD B2C.
• Experience with Blazor or SignalR.
• Experience with Telerik / Kendo UI components.

• Experience working in M&A, carve-out, or large-scale platform separation programs.

   

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

We are looking for a Lead .Net Full-Stack Engineer (with Angular or React) to join a dedicated delivery team working on a high-visibility engagement with a US-based payments technology company undergoing a strategic carve-out into a standalone business entity.
The platform processes card payments end-to-end for thousands of institutional customers and includes multiple production-grade .NET applications, such as a central payment gateway, a registration platform with an encrypted card vault, an AWS-native ticketing and point-of-sale solution, and a large commerce application with a single-tenant database model.

This is a fast-paced, security-focused modernization initiative with a hard 3-month delivery window. The team is responsible for performing security remediation, upgrading legacy frameworks and dependencies, and supporting the separation of Azure and AWS environments into an independent infrastructure landscape. The role offers direct exposure to CTO-level stakeholders and the possibility of continuing into a longer-term platform re-architecture phase.

Responsibilities:

• Remediate security findings across ASP.NET applications (MVC, Web API, Razor Pages), including issues related to secrets management, cryptography, token handling, injection vulnerabilities, and sensitive-data logging.
• Upgrade legacy .NET Framework applications to supported versions and migrate components to .NET 6+/8 where feasible.
• Modernize and stabilize frontend dependencies across Angular, React, TypeScript, and Telerik/Kendo UI codebases.
• Investigate and reverse-engineer brownfield systems, including legacy components, to understand data flows and payment-processing logic.
• Collaborate closely with the client’s retained engineering team, working effectively even in areas with limited documentation or SME coverage.
• Contribute to validation and retest activities by preparing evidence packages, deployment logs, and before/after remediation artifacts.
• Support CI/CD-driven delivery and ensure changes are shipped with appropriate testing, QA validation, and rollback procedures.
• Participate in technical discussions around future platform modernization and integration initiatives.

Requirements:

• 6+ years of professional experience in .NET development on large-scale production systems.
• Strong expertise in C# and ASP.NET (MVC, Web API, Razor Pages).
• Hands-on experience working with both .NET Framework 4.5.x-era applications and .NET 6+/8 modernization or migration efforts.
• Solid experience with Entity Framework / EF Core.
• Strong frontend skills with Angular, React, and TypeScript.
• Proven experience working on brownfield or legacy modernization projects.
• Practical experience remediating security vulnerabilities and applying secure coding practices (OWASP-related issues, secrets handling, cryptography, authentication/session management).
• Ability to work independently in complex, partially documented environments.
• Upper-Intermediate English (B2+) or higher.

Nice to have:

• Experience in payments, fintech, PCI DSS, or other security-sensitive domains.
• Experience with Azure PaaS services (App Services, Functions, Service Bus, Cosmos DB).
• Experience with AWS services (Lambda, S3, SNS/SQS).
• Familiarity with Azure AD B2C.
• Experience with Blazor or SignalR.
• Experience with Telerik / Kendo UI components.

• Experience working in M&A, carve-out, or large-scale platform separation programs.

   

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

We are looking for a Lead .Net Full-Stack Engineer (with Angular or React) to join a dedicated delivery team working on a high-visibility engagement with a US-based payments technology company undergoing a strategic carve-out into a standalone business entity.
The platform processes card payments end-to-end for thousands of institutional customers and includes multiple production-grade .NET applications, such as a central payment gateway, a registration platform with an encrypted card vault, an AWS-native ticketing and point-of-sale solution, and a large commerce application with a single-tenant database model.

This is a fast-paced, security-focused modernization initiative with a hard 3-month delivery window. The team is responsible for performing security remediation, upgrading legacy frameworks and dependencies, and supporting the separation of Azure and AWS environments into an independent infrastructure landscape. The role offers direct exposure to CTO-level stakeholders and the possibility of continuing into a longer-term platform re-architecture phase.

Responsibilities:

• Remediate security findings across ASP.NET applications (MVC, Web API, Razor Pages), including issues related to secrets management, cryptography, token handling, injection vulnerabilities, and sensitive-data logging.
• Upgrade legacy .NET Framework applications to supported versions and migrate components to .NET 6+/8 where feasible.
• Modernize and stabilize frontend dependencies across Angular, React, TypeScript, and Telerik/Kendo UI codebases.
• Investigate and reverse-engineer brownfield systems, including legacy components, to understand data flows and payment-processing logic.
• Collaborate closely with the client’s retained engineering team, working effectively even in areas with limited documentation or SME coverage.
• Contribute to validation and retest activities by preparing evidence packages, deployment logs, and before/after remediation artifacts.
• Support CI/CD-driven delivery and ensure changes are shipped with appropriate testing, QA validation, and rollback procedures.
• Participate in technical discussions around future platform modernization and integration initiatives.

Requirements:

• 6+ years of professional experience in .NET development on large-scale production systems.
• Strong expertise in C# and ASP.NET (MVC, Web API, Razor Pages).
• Hands-on experience working with both .NET Framework 4.5.x-era applications and .NET 6+/8 modernization or migration efforts.
• Solid experience with Entity Framework / EF Core.
• Strong frontend skills with Angular, React, and TypeScript.
• Proven experience working on brownfield or legacy modernization projects.
• Practical experience remediating security vulnerabilities and applying secure coding practices (OWASP-related issues, secrets handling, cryptography, authentication/session management).
• Ability to work independently in complex, partially documented environments.
• Upper-Intermediate English (B2+) or higher.

Nice to have:

• Experience in payments, fintech, PCI DSS, or other security-sensitive domains.
• Experience with Azure PaaS services (App Services, Functions, Service Bus, Cosmos DB).
• Experience with AWS services (Lambda, S3, SNS/SQS).
• Familiarity with Azure AD B2C.
• Experience with Blazor or SignalR.
• Experience with Telerik / Kendo UI components.

• Experience working in M&A, carve-out, or large-scale platform separation programs.

   

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

We are looking for a Lead .Net Full-Stack Engineer (with Angular or React) to join a dedicated delivery team working on a high-visibility engagement with a US-based payments technology company undergoing a strategic carve-out into a standalone business entity.
The platform processes card payments end-to-end for thousands of institutional customers and includes multiple production-grade .NET applications, such as a central payment gateway, a registration platform with an encrypted card vault, an AWS-native ticketing and point-of-sale solution, and a large commerce application with a single-tenant database model.

This is a fast-paced, security-focused modernization initiative with a hard 3-month delivery window. The team is responsible for performing security remediation, upgrading legacy frameworks and dependencies, and supporting the separation of Azure and AWS environments into an independent infrastructure landscape. The role offers direct exposure to CTO-level stakeholders and the possibility of continuing into a longer-term platform re-architecture phase.

Responsibilities:

• Remediate security findings across ASP.NET applications (MVC, Web API, Razor Pages), including issues related to secrets management, cryptography, token handling, injection vulnerabilities, and sensitive-data logging.
• Upgrade legacy .NET Framework applications to supported versions and migrate components to .NET 6+/8 where feasible.
• Modernize and stabilize frontend dependencies across Angular, React, TypeScript, and Telerik/Kendo UI codebases.
• Investigate and reverse-engineer brownfield systems, including legacy components, to understand data flows and payment-processing logic.
• Collaborate closely with the client’s retained engineering team, working effectively even in areas with limited documentation or SME coverage.
• Contribute to validation and retest activities by preparing evidence packages, deployment logs, and before/after remediation artifacts.
• Support CI/CD-driven delivery and ensure changes are shipped with appropriate testing, QA validation, and rollback procedures.
• Participate in technical discussions around future platform modernization and integration initiatives.

Requirements:

• 6+ years of professional experience in .NET development on large-scale production systems.
• Strong expertise in C# and ASP.NET (MVC, Web API, Razor Pages).
• Hands-on experience working with both .NET Framework 4.5.x-era applications and .NET 6+/8 modernization or migration efforts.
• Solid experience with Entity Framework / EF Core.
• Strong frontend skills with Angular, React, and TypeScript.
• Proven experience working on brownfield or legacy modernization projects.
• Practical experience remediating security vulnerabilities and applying secure coding practices (OWASP-related issues, secrets handling, cryptography, authentication/session management).
• Ability to work independently in complex, partially documented environments.
• Upper-Intermediate English (B2+) or higher.

Nice to have:

• Experience in payments, fintech, PCI DSS, or other security-sensitive domains.
• Experience with Azure PaaS services (App Services, Functions, Service Bus, Cosmos DB).
• Experience with AWS services (Lambda, S3, SNS/SQS).
• Familiarity with Azure AD B2C.
• Experience with Blazor or SignalR.
• Experience with Telerik / Kendo UI components.

• Experience working in M&A, carve-out, or large-scale platform separation programs.

   

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