Back-end engineering for scalable products
Secure, high-performance back-ends for SaaS, mobile, and enterprise products — high-load APIs, data pipelines, and the modern AI infrastructure (RAG, vector stores, agent runtimes) when your roadmap calls for it.
Node.js
Python
Java
.Net
PHP
Golang
Why Diffco
Built to scale
Back-ends designed for growth — high-load APIs, queue-based pipelines, horizontal scaling, multi-region deploys. Built to outlast your roadmap.
Senior engineering depth
18+ years of back-end across SaaS, mobile, enterprise, and AI-native products. The engineer who designs your architecture is the engineer who ships it.
AI infrastructure, when you need it
RAG pipelines, vector stores, agent runtimes, streaming responses, evals, and observability — production-grade AI infrastructure available when your product calls for it.
Compliance- and cost-aware
HIPAA-aware, GDPR-aware, SOC 2-aligned design patterns. Cost-aware AI infrastructure (token, latency, model selection) baked in from day one when you’re shipping AI.
Technical stack
Backend
Node.js
Python
Java
.Net
PHP
Nest.js
Express
ASP.NET
Django
Flask
Ruby on Rails
Sinatra
C#
Symfony
Laravel
Yii
Go
Erlang
Scala
Rust
AI
OpenAI GPT
Llama
Anthropic
Gemini
Hugging Face
Tensorflow
PyTorch
OpenCV
DeepSeek
Qwen
LangChain
LangGraph
Pinecone
Weaviate
pgvector
Don’t see the tech stack you are looking for? No worries!
Our team has experience finding candidates for custom requirements and various tech stacks. Please contact us, and let’s find you a perfect candidate.
Our engineers developed products for
Project Stages and Flow
We run every project through Production-Ready AI Engineering — senior engineers and AI agents in the same delivery loop, with evals and human review built in.
Initial stage
We ensure your project’s success with careful planning. During the initial stage, we collaborate with you to align functionality, performance, and design. We define strategy, set priorities, and establish your budget and deadlines before starting work.
Design stage
After developing a clear plan of action for your project, our product design process begins. Using a collection of industry-proven techniques and tools, we work to optimize your application’s usability, success, and efficiency, without compromising on scalability.
Development stage
We build in short Agile sprints with senior engineers, adding AI agents to the loop on AI projects (Production-Ready AI Engineering). Code, tests, integrations, observability, and security move forward together.
Ongoing development, support, and maintenance stage
After the MVP launch, we run sprints to improve functionality, upgrade backend components, and apply security updates. We support and maintain your backend system on your behalf, so you can focus on growing your business.
Development Formats and Billing
Monthly Team Allocation
The best products require experimentation and iteration. With Monthly Team Allocation, you reserve a dedicated squad. You get:
- A senior team that’s always yours, never reassigned mid-project
- Scope and priorities you can flex sprint by sprint
- Predictable monthly spend with no padding for risks you may never use
- Velocity from a team that already knows your codebase
Agile
We believe in Agile development. Agile front-end development involves the use of a series of short sprints, which allow for quick and transparent progress in your project. We apply our nimble and responsive ideologies to each front-end project. Rather than relying on the restrictive linear Waterfall approach, Agile ensures we can provide a flexible service resulting in a custom front-end solution, which earns your approval at every stage.
We offer 2 approaches
to developing your project
Project
development
Project development provides a fully dedicated team to bring your vision to life, ensuring seamless delivery and alignment with your goals.
Benefits of Working with Diffco
Senior teams, no junior bench
Senior engineers from day one. The engineer who scopes the work is the engineer who ships it.
Streamlined Development Process
Agile project management will keep you in the loop, providing useful feedback during every iteration of your project.
Transparent Billing
You will always know what to expect and never face any surprises in the billing department. Understand your charges, both what you’re paying for and why.
Clear Communication and Detailed Reporting
From the moment we first connect to the moment we deliver exactly what you need, you’ll have all the information you need to keep your finger on the pulse of your project.
Success stories of our clients
We developed a custom booking solution for an innovative bike rental platform
Led Core Platform Development & Supported Product Growth Through Seamless Operations
We have delivered an AI tool that simplifies writing tasks through personalized guidance
We developed an iOS app for socializing with like-minded people by participating in engaging events
We’ve developed an Android mobile app for a quick groceries delivery service
We’ve developed an audio marketing platform with intelligent advertisements
We were impressed by Diffco’s approach to the development process and how they engineer new solutions.
We’ve introduced computer vision technology for easy ID and DL recognition for car rental services
We have developed a new generation app that simplifies the payment process in restaurants and brings a new dining experience
We’ve created a simple and convenient solution, which helps police officers to fill in a Field Investigation Card
We’ve created a web platform and ERP solution for a new generation real estate service for retail businesses
We’ve developed an AI-powered app to create stunning in-home newborn photography
We’ve created AI technology that makes everyone a movie star
We’ve built an AI app that allows anyone to choose a restaurant like a food expert
We’ve implemented an excellent technology of sound transmission over WiFi
We’ve developed an app to assist with instant drug type recognition for police officers
We’ve developed an app that helps pet owners find a vet in their area
We’ve developed a platform where players can earn bonuses by playing top mobile games
We’ve created an app that turns your device into a child monitoring system in your car
Chemtreat offers customized and innovative solutions to enhance operating efficiency in industrial water treatment systems and processes
We’ve designed a cloud platform tailored to critical Infrastructure protection
We’ve delivered an advanced ERP system for service centers
We’ve developed a BI visual analytics solution for healthcare providers
We’ve created a personalized online platform with various banking services
We’ve delivered a convenient website with an amazing atmosphere of ‘escape’ rooms
We created a platform for professionals and beginners in the aviation industry
We developed a promo website and a custom booking system for discovery flight provider
We developed an e-commerce platform and ERP for premium lighting solution vendor
We launched an e-commerce platform and custom loyalty solution for next-generation pipe brand
We developed a custom booking solution for an innovative bike rental platform
Led Core Platform Development & Supported Product Growth Through Seamless Operations
Explore our
amazing case studies
Frequently Asked Questions
Frequently Asked Questions
Why choose Diffco for your ongoing development services?
Back-end engineering is the difference between a demo and a product. 18+ years of building back-ends across SaaS, mobile, enterprise, and AI-native products in healthcare, fintech, and martech. We ship the classic stuff (APIs, databases, infrastructure) and the AI infrastructure (RAG, vector stores, agent runtimes, evals) — under the same engineering bar.
What types of frameworks is your team knowledgeable in?
Node.js, Nest.js, Express, Python (Django, Flask, FastAPI), Java (Spring), Go, .NET, PHP (Symfony, Laravel), Ruby on Rails, and more. For AI workloads we work daily with LangChain, LangGraph, LlamaIndex, Pinecone, Weaviate, pgvector, and major model providers.
Do you build back-ends that don’t use AI?
Yes. Many of our back-end engagements are classic web, SaaS, and enterprise work — no AI workload at all. Same senior engineers, same engineering bar.
Can you migrate or re-platform an existing back-end?
Yes. We’ve moved teams from PHP monoliths to Node/Go microservices, from on-prem to AWS/GCP/Azure, and from synchronous monoliths to event-driven architectures.
Do you handle DevOps and infrastructure?
Yes. We work with AWS, GCP, Azure, Docker, Kubernetes, Terraform, and the major observability tools (Datadog, New Relic, Grafana, Sentry).
How do you approach API design — REST, GraphQL, or gRPC?
It depends on your product. REST for most public APIs. GraphQL when the front-end shape changes often. gRPC for high-throughput internal services. We pick during architecture.
Do you handle databases as well — design, migrations, performance tuning?
Yes — relational (PostgreSQL, MySQL, SQL Server), NoSQL (MongoDB, DynamoDB), analytics (Snowflake, BigQuery, Redshift), and vector stores (Pinecone, Weaviate, pgvector) for AI workloads.
The Benefits of Working with Diffco for Backend Services
Diffco offers clients a reliable, consistent, and efficient way to develop backend projects in a timely and cost-effective manner. Our dedicated and experienced team of backend developers provide you with the guidance and support you need every step of the way, ensuring your project is a success. Using cutting edge technology, your backend development project is in good hands with Diffco. Key advantages of working with Diffco include: Expert developers: Our backend developers are experts in their field, with years of software and app development experience and extensive industry knowledge. They can build a secure, robust, and resilient framework, what will be perfect for your site or application. Full stack development: Because we are not just a backend development company, but also frontend and mobile app developers, we have the knowledge and expertise to make your backend application better. We understand the user experience from a frontend and mobile perspective, and can ensure that the backend is designed with an understanding of how users will interact with the application. We can also make sure that the data flow between the frontend and backend is optimized for speed and performance. Innovative designers: A team of intuitive and inventive designers work with our developers in tandem to ensure your solution not only performs according to expectations, but looks and feels flawless too. Supportive project managers: Discover the benefits of a truly collaborative process with experienced project managers who keep your project coordinated, and on track, so you can be ready to launch at the right time. Streamlined development: Our Agile project management and iteration strategies allow for rapid and efficient development. We can adjust your project whenever needed, and adapt according to your specific requirements. Transparent billing: Keep your budget on track, as well as your project. Our transparent billing system ensures you’ll never get a nasty surprise when your project is complete. Frequent communication: We’ll always keep you in the loop. Forget development teams that keep you in the dark. Our experts illuminate the details of your project every step of the way, with consistent reporting and communication. Whether you’re looking for web application development, a mobile application, or a robust backend solution, Diffco can provide your company with custom software development that satisfies your business needs, goals, and growth. Contact us today to discuss our backend development services.
Is there a framework that Diffco recommends?
The framework recommendation depends your project and business requirements. Diffco usually recommends popular industry-proven solutions such as Symfony, Laravel, Node.js, Nest.js, Express, Spring or others. After the Discovery stage we can suggest you full technological stack.
Let’s build something
great together.
Need other services?
Front-end development
We are experienced in building modular, high-performance web applications for corporate clients and startups. We utilize modern and robust technology stacks.
Team Augmentation
We provide engineers or teams tailored to your project, ensuring skill and compatibility with your goals and culture. They will collaborate with you closely, infusing fresh energy and ideas.
Mobile Development
We specialize in developing native and cross-platform mobile applications for iOS and Android.
Web Development
Our developers can create web solutions that are tailored to your needs, easy to manage with popular CMS, and which can be seamlessly integrated with your existing internal systems.
