Jobs ASP.NET

We are looking for a skilled and proactive Middle+ ASP.NET Developer to join our remote team. You’ll work on a variety of client projects, build scalable solutions, and contribute to architectural decisions. If you're passionate about backend development and modern .NET technologies — let's talk!
 

Requirements:

• Strong knowledge of C# and advanced .NET features (LINQ, async/await, multithreading)
• Solid experience with ASP.NET Core MVC & Web API
• Familiar with .NET 6/8, Middleware, and Dependency Injection
• Deep understanding of RESTful API design, OpenAPI/Swagger
• Experience with authentication/authorization (JWT, OAuth2)
• Database experience:
  • Entity Framework Core (Code-First, Migrations)
  • SQL optimization, indexes, transactions
  • NoSQL (Redis, MongoDB – nice to have)
     

Frontend & Web:

• Confident in JavaScript, TypeScript, jQuery
• Strong HTML5, CSS3 (SCSS/Less), Bootstrap skills
   

DevOps & CI/CD:

• Experience with Azure DevOps pipelines
• Familiar with logging and monitoring tools (Serilog, Application Insights)
   

Architecture & Code Quality:

• Understanding of DDD, CQRS, microservices
• Familiar with SOLID, DRY, KISS principles
• Experience building multi-layered applications and refactoring legacy code
   

Testing & Security:

• Writing Unit Tests and using mocking frameworks (xUnit, NUnit)
• Knowledge of OWASP Top 10, securing APIs (CORS, CSRF, XSS, SQL Injection)
   

Teamwork & Process:

• Experience in Agile/Scrum teams
• Code reviews, working with Pull Requests
• Understanding of CI/CD collaboration with DevOps
   

We offer:

• Full-time remote position
• Long-term cooperation on interesting projects
• 24 paid vacation days + 5 paid sick days
• Communication in Ukrainian
• Friendly team, modern stack, and growth opportunities
   

Join a team where your code makes an impact — apply now! 💻

🔹 About the company

MAF is a global adtech company in performance app marketing. Since 2012, we’ve been building products like myAppFree and MyChips SDK, helping users discover offers while enabling advertisers and publishers to scale efficiently.

We build high-load, event-driven systems processing large volumes of real-time data across cloud environments.

🔹About the role

• Long-term, full-time position
• International team (5 engineers)
• EU time zone collaboration
• Engineering-focused culture with strong ownership
   

🔹 What you’ll do

• Develop and maintain backend services and APIs (.NET)
• Build frontend features using TypeScript (Lit)
• Collaborate with Product, Data, and Design teams
• Take ownership of features end-to-end (design → deployment → monitoring)
• Improve system performance and reliability
• Participate in architecture discussions and technical decisions

• Contribute to code quality, reviews, and knowledge sharing

   

   

🔹 Requirements

• 3-5+ years of commercial experience
• Strong backend skills (C# / .NET or Java)
• Experience building REST APIs
• Good understanding of databases (SQL + NoSQL)
• Experience with cloud platforms
• Docker / Kubernetes experience
• Strong communication skills (English is critical)

Ownership mindset and ability to work in a distributed team

🔹 Nice to have

• Experience in adtech / performance marketing
• Frontend experience (React / Angular / Vue)
• Event-driven systems experience
• CI/CD and testing experience

Interest in AI / LLM systems

🔹 Hiring process

• 3 interview stages

Focus on technical skills and communication

🔹 What you get

• Long-term project with transparent processes and stable growth
• Opportunity to influence technical decisions
• Flexible schedule, remote, or office in Lviv
• Transparent compensation + full accounting support
• Paid vacation and sick leave
• Internal trainings and certification support
• High-quality work equipment
• Small, international team (high impact per engineer)
• Direct influence on product and architecture
• Opportunity to grow into senior/lead roles

Product Engineer

AI-Enabled Products · Full-Stack · End-to-End Ownership
 Fully Remote (Europe preferred)
 Independent Contractor · 50–70% initially (ramping to full-time within 6–12 months)
 Reports to Founder & CEO

You’re Not a Cog. You’re the Engine.

Most engineering roles give you a ticket queue. This one gives you a product.

At Informed Decisions, you’ll take real ownership over how a meaningful B2B SaaS platform gets built- from architectural decisions to AI integrations to what ships on Friday. You’ll work directly with the founder, with real influence over technical direction, and you’ll see the impact of your work in how organizations hire and how people’s careers unfold.

If you’ve been waiting for a role where your judgment actually matters, this is it.

What We’re Building

Hiring is broken in ways most companies don’t even measure. Informed Decisions addresses this by combining IO psychology with data-driven product design- including statistical models, analytics, and AI-enabled capabilities- to make interviews fairer, more consistent, and truly predictive of on-the-job success.

We help organizations improve interviewer skills, reduce bias, and connect hiring decisions to real post-hire outcomes. The product is live, the problem is real, and the work is technically interesting.

What You’ll Own

This is a full-stack product engineering role. You’ll work across the system with .NET and Python on the backend, APIs and integrations, AWS infrastructure, and AI-enabled workflows embedded into real product features.

Your first major responsibility is taking full ownership of a live, production product- from database and backend services through APIs and application layers- currently developed with an external vendor. This includes deeply understanding what’s been built, identifying what needs to evolve, and establishing the engineering practices and standards that will carry the platform forward.

This is an active system with real users, real data, and real consequences. We’re looking for someone who can navigate this transition with technical rigor, sound judgment, and a strong sense of ownership.

On the product side, you’ll design and ship features end to end. That means writing the code, making architectural calls, defining what “done” looks like, and owning production quality.

On the AI side, you’ll build workflows that integrate LLMs and AI services into the product in ways that are reliable, observable, and grounded in measurable hiring outcomes.

Beyond the core platform, you’ll make judgment calls about when a customer need belongs inside the platform and when a standalone tool or application is the right answer- and then you’ll build it.

Engagement Model

This role starts as an independent contractor engagement, scoped at approximately 50–70% capacity.

The intent is to increase scope and ownership over time, with a planned ramp toward full-time (100%) involvement within 6–12 months, based on mutual fit, impact, and company needs.

You’ll Thrive Here If…

• You’ve shipped production systems and can show your work through code, products, or a real portfolio
  
   
• You’re comfortable owning decisions when there’s no one to escalate to
  
   
• You’ve worked with .NET and Python in real production environments
  
   
• You’ve integrated AI or LLM services into live products, not just prototypes
  
   
• Remote-first work suits how you operate- you create structure rather than relying on it
  
   
• Your English is fluent (spoken, written, and reading), strong enough to communicate technical decisions clearly across time zones
  
   

Experience with early-stage SaaS, third-party integrations, and complex systems is a strong advantage. The tradeoffs are real, and the work reflects that.

Why This Role, Why Now

• Direct line to the founder, with real influence on product direction
  
   
• Work tied to measurable outcomes: fairer hiring and better decisions
  
   
• A remote environment built on trust, not surveillance
  
   
• High ownership from day one across a technically deep and socially meaningful problem
  
   

How We Evaluate

We don’t screen on credentials. We evaluate based on what you’ve built and how you think. Come ready to show your work.

Informed Decisions is fully remote and welcomes contractor applications from across Europe.

Sounds relevant? Apply here:

https://informedecisions.app/access/05ea079f-84e2-4027-98ae-ea6c4c2c0859/

We are looking for an experienced .NET Developer to help us build a resilient, high-load system. The project consists of multiple web apis and services interacting via gRPC and Kafka, with extensive use of PostgreSQL, Redis, ClickHouse, and SignalR supporting a large number of simultaneous connections.

Responsibilities:

• Developing Web APIs using ASP.NET Core (.NET 10) with gRPC, Kafka, PostgreSQL, ClickHouse, and Redis.

• Developing and optimizing a SignalR service that supports high concurrency.

• Configuring monitoring and logging (Serilog, Prometheus, Grafana).

• Development with fault tolerance and high availability in mind

Requirements:

• Experience with .NET Core / .NET 10

• Experience with gRPC, Kafka, PostgreSQL, Redis

• Knowledge of SignalR and experience managing a large number of connections.

• Experience with monitoring tools (Prometheus, Grafana, etc.).

Nice to have:

• Experience working with high-load systems (100k+ concurrent connections).

• Knowledge of resilience principles and ensuring HA.

• Understanding of ClickHouse (data modeling, query optimization).

What we offer:

• Interesting challenges on a high-load project using a modern technology stack.

• Opportunity to influence the system architecture.

• Flexible working hours and remote work options.

Project Description:

Small team of stellar engineers to deliver MVP of a new portfolio performance system for top tier hedge fund.
You'll have all the decision power to influence the architecture decisions and delivery process.

Luxoft: 3 developers in Poland
Customer: 1 Engineering manager in London
Primary Stack: .Net, Angular, MSSQL, Azure

Responsibilities:

- Collaborate with Portfolio managers and external teams
- Derive requirements and match it with architecture solutions
- Develop, test and deploy application
- L3 support the end users and business

Mandatory Skills Description:

Fluent English and superb communication skills
Expertise in C#/.Net backend development
Expertise in modern complex frontends in Angular
Good understanding of distributed and high performance systems architecture
Experience with databases, data modelling and scaling
Bias for action

Nice-to-Have Skills Description:

Experience with Ag Grid, Glue42
Experience with Azure
Experience with investment finance

The primary objective of this position is to produce required product in conjunction with team members insuring it is of high quality and is timely.

RESPONSIBILITIES:

• Actively participate in numerous C# projects
• Maintenance support of legacy code, including ASP/ASP.Net, MVC, JS, SQL
• Gather and produce requirements and designs
• Write and test code for the required product
• Accurately plan software development activities and follow established processes
• Work productively as part of a software development team
• Have the functional and technical skills and knowledge to do the job at a high level of accomplishment
• Perform up to standard independently, self-starting
• Actively participate in discussions regarding technical issues

REQUIREMENTS:

• Bachelor’s degree in computer science or related discipline
• Over 4 years of C# development, enterprise-class system architecture and design or equivalent combination of education, skills and experience
• Strong command of English (from B2 and higher) with the ability to communicate easily on wide range of topics, including technical discussions
• .NET Framework 4 (C#, ASP.Net)
• .NET Core / Framework 5+
• Good knowledge of SQL is a must
• Demonstrated record of delivering high quality software products to market
• Awareness of current technology
• Strong problem-solving skills and ability to be a successful member of a team
• Desire to gain experience with distributed application architecture, interaction with offshore development teams

GOOD TO HAVE:

• Python — basic level
• Knowledge of jQuery, knockout.js is optional
• Knowledge of Classic ASP is a plus
• C++ and Containers (Docker) are optional
   

WE OFFER:
CQG provides a variety of benefits to enhance your personal and financial well-being. Employees and eligible dependents may participate in the following:

• Career and professional opportunities
• Competitive salary
• Medical insurance
• Slovenian classes
• Flexible vacation schedule and paid sick leave days
• Team buildings, meetings with colleagues from other offices, conferences, and much more

We're looking for an experienced z/OS Developer with hands-on knowledge of FIPS 140-3 cryptographic standards to join our team on a full-time remote basis.

What you'll do:

Develop, maintain, and optimize applications on IBM z/OS mainframe environments

Implement and validate cryptographic modules in compliance with FIPS 140-3 requirements

Collaborate with security and architecture teams to ensure regulatory compliance

Troubleshoot and resolve mainframe-related issues in production and development environments

What we're looking for:

Proven experience in z/OS development (COBOL, PL/I, Assembler, or Java on z/OS)

Hands-on experience with FIPS 140-3 certification and cryptographic implementation

Strong understanding of mainframe security architecture

Experience in banking, finance, or government sectors is a plus

Ability to work independently in a remote environment

What we offer:

Competitive salary

Fully remote, full-time position

Work on high-impact, mission-critical systems

Collaborative and technically strong team

We’re building Wall Street’s next-generation stocks trading platform — and we’re hiring C# engineers!
 

We’re Pinnakl, a SaaS company that’s been quietly disrupting the hedge fund software space for the past 8 years. Today, 100+ Wall Street clients run on our platform — and we’re just getting started. We’re expanding our engineering team and looking for exceptional engineers (5+ years experience) who write clean, elegant, and performant code. You’ll work on real-time trading systems used by some of the most sophisticated funds in the world. If you love beautiful architecture, complex challenges, and real product impact, this is one of those rare chances to build something that actually moves markets.
 

You’ll build and maintain backend services powering a large, data-heavy enterprise platform. This is a hands-on role: schema design, API endpoints, performance/security hardening, and production support—shipping features end-to-end with a small, high-ownership team.
 

What kind of Features you will work on
 

1. Implementation of personalized news notifications feature Develop a highly effective subscription management mechanism enabling customers to receive timely updates about significant corporate actions/events affecting assets in their investment portfolios. Ensure stable connectivity with data providers, reliable storage solutions, and reusable access to collected data for other Pinnakl microservices.

2. Performance optimization of stock trading services
Conduct thorough profiling and monitoring analysis to identify bottlenecks and critical areas. Apply advanced techniques including caching mechanisms, responsibility redistribution among microservices, and refactoring current code base. Implement automated testing practices along with CI/CD methodologies.

3. Enhancing system observability across all infrastructure components
Investigate the full lifecycle of customer requests and integrate modern tools to improve observability. Enhance logging systems, robust tracing capabilities, and comprehensive monitoring frameworks. Create user-friendly dashboards providing instant visibility into problem zones and facilitating quick issue resolution.

4. Integration of AI technologies for risk calculation and compliance control
Design and build infrastructure for seamless interaction with machine learning models aimed at improving risk calculations of investment portfolios and trading compliance control.

5. Modernization of CRM system using microservice architecture

Migrate the existing CRM solution onto a new microservices architecture based on Clean Architecture principles. This effort will accelerate our company's large-scale transformation program of IT infrastructure.

 

Responsibilities

• Scoping, architecting, modeling and implementing multiple new product features as you collaborating with front end engineers, UX designers, and founder.
• Getting your hands dirty, writing API endpoints, schemas, data-handling functions, and other code.
• Advising and guiding the evolution of our product roadmap, providing feedback on feasibility and estimated timelines for new feature development.
• Optimize applications for performance, accessibility, and security

Required Experience

• Strong backend experience in C# / .NET
• Strong experience in ASP.NET Core
• Experience with unit testing in .NET
• Experience in SQL
• Knowledge of SOLID principles
• Experience in microservice architecture
• Nice to have (But not required)
  • Knowledge of Clean Architecture principles
  • Experience in buses (like Kafka and Azure Service Bus) and caches (like Redis)

Expectations

We're building mission-critical software for some of the most demanding clients in finance. Here's what that means in practice:

• Ownership over tickets: You'll work within structured sprints, but we expect you to think critically, ask clarifying questions, and take ownership of outcomes — not just check off tasks.
• Delivery-focused culture: We measure success by shipped features and real product impact, not story points or hours logged.
• Full-time commitment: This is a dedicated role requiring 45–50 hours per week. We don't have rigid hours, but expect most work to wrap up by 7 PM your local time. We're looking for engineers who are fully invested in Pinnakl's success — this isn't compatible with side-freelancing.
• AI-assisted development is expected.

If you're looking for a place where you can grow, ship meaningful work, and be treated as a core part of the team — not just a ticket processor — we'd love to hear from you.

Why Pinnakl

• You’ll work with a strong group of senior engineers and learn fast by shipping.
• You’ll build real production systems used daily (not VC-funded MVP work).
• Your work has direct impact on how Wall Street operates, replacing legacy systems that haven’t evolved in decades.
• As the company grows, compensation grows with it.
• We invest in long-term team members and aim to provide stability in a market that’s changing quickly.

Servio Soft входить до топ-5 IT-компаній розробників ПЗ для готелів та ресторанів вже 20 років на ринках України, Казахстану, Узбекистану, Киргизії та Польщі. В Україні офіси нашої компанії знаходяться в Києві, Львові, Дніпрі. Продуктами нашої компанії на платформі SERVIO користуються понад 5000 клієнтів у різних країнах. Ми цінуємо працю та час кожного, надаючи масу можливостей для професійного розвитку та кар'єрного зростання. Робота в Servio Soft — це робота в дружній та надихаючій атмосфері, комфортному офісі. Детальна інформація про компанію: www.youtube.com/watch?v=WcB-_p2cHow expertsolution.com.ua www.facebook.com/expertsolution2006 www.instagram.com/servio_pos 

Необхідні навички

• Базовий досвід програмування на C#/.NET (від 6 місяців навчальних або 3+ місяців комерційних проєктів).
• Знання ASP.NET Core / Web API на базовому рівні.
• Розуміння роботи з MSSQL Server (запити SELECT, JOIN).
• Навички роботи з LINQ, Entity Framework.
• Знання JavaScript (базовий рівень); Розуміння принципів ООП.
• Бажання навчатися та розвиватися.

Буде плюсом:

• досвід навчальних або pet-проєктів на .NET MAUI / Xamarin;
• знання TypeScript або одного з фронтенд-фреймворків (React/Vue/Angular);
• досвід участі в командних проєктах (GitHub, курсові, стажування).

Обов’язки:

• Участь у розробці та підтримці веб-додатків на C#/.NET.
• Робота з базою даних MSSQL: створення простих запитів, процедур.
• Допомога у розробці REST API та бізнес-логіки.
• Виконання завдань під керівництвом Middle/Senior розробників.
• Документування свого коду.
• Вивчення нових технологій та активний розвиток у команді.
• Формат роботи —офлайн/гібридний

Пропонуємо:

• Робота в міжнародній компанії;
• Офіційне працевлаштування:
• Cтабільна та вчасна оплата праці;
• П’ятиденний графік роботи (з 09−00 по 18−00);
• Оплачуване стажування, ставка + річний бонус.
• Комфортабельний офіс у 5 хвилинах від метро Контрактова площа;