Álvaro
Data Scientist
“In a climate this uncertain, Shakers gives you a layer of reassurance and confidence. What I like most, without a doubt, is the flexibility and getting to work on top-tier projects.”
Join ShakersBackend work by project
Work as a Backend Developer
Collaborate on backend projects from certified clients. Shakers connects you with projects aligned with your stack, day rate and availability, with more flexibility and better terms.
As a contract Backend Developer at Shakers you build APIs, services and integrations for clients with already-defined projects. You design the server-side logic and the data architecture that keeps the product running under load.
You work project-based in human + agent teams, choose what you take on and bill according to your level.
- Higher-paying projects
- More continuity between projects
- Greater recognition for your experience
+3,000
Tech projects published on Shakers
+90
Tech, Product and Data specialisms are part of Shakers
6 months
Average length of a project with Shakers
4.7/5
Our AI Builders' satisfaction on Trustpilot
AI Builder careers powered by Shakers
See how other AI Builders access better projects, build their reputation and grow their careers.
Amelia
AI Agent Developer
“I have been building AI agents for years. Thanks to Shakers I stopped chasing clients and started genuinely choosing which projects I wanted to work on. I work with some of the best companies in Europe, at my own rate, and I focus on what I am good at and what I love: building.”
Join Shakers
Luz
Backend Developer & Data Engineer
“Shakers adds a lot of value because it connects you with sharper projects, already filtered and better defined. It saves you a big part of the upfront work of understanding the client, quoting and weighing up whether it is worth it, and that means that as a contractor you can go far more directly to the opportunities that genuinely fit you.”
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Rubén
Software Developer
“Life as a contractor has a lot going on and it is not always easy. We like to focus on what we are good at, but you also have to manage clients, invoicing and go looking for work. For me, Shakers has been key because it does that prospecting for me, it gives the client confidence from the very first moment, and it lets us be part of a community with real enthusiasm.”
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Alejandro
AI Developer
“Shakers was key to getting my company off the ground: it gave me the flexibility to keep contracting while I built my next chapter. Without Shakers, I would have had to raise funding or push the project back.”
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Toño
Product Designer
“With Shakers I have landed recurring projects that give me peace of mind and room to grow professionally. It is not just about reaching quality clients: it is feeling that you have a network behind you, one that connects you with real opportunities and helps you move forward as a freelancer.”
Join ShakersWhat you can build as a Backend Developer
A Backend Developer is the programmer who answers for a product's state: what gets stored in the database, under which guarantees it is written and under which contract its REST APIs expose it. Java, Python, Go or Node.js almost always solve the same thing; what separates one specialist from another are the decisions underneath, such as the boundary of a transaction, the idempotency of a retry or the data model that survives growth. If they also own the interface, the market calls it full stack.
From standing up a service from scratch to stabilizing a system in production: APIs, integrations, migrations and team reinforcement, always with verified clients.
Typical stack: Node.js, Python, Java, Go, PostgreSQL, MongoDB, Redis, Docker, Kubernetes, Kafka, REST and GraphQL.
Node.jsPythonJavaGoPHPREST APIsGraphQLPostgreSQLMySQLMongoDBRedisDockerKubernetesAWSKafkaRabbitMQGitJWTOAuth2
APIsDatabasesDockerKubernetesQueues
Free to join, no hidden fees
How Shakers works for talent
Create your profile
Tell us who you are, what you can do, the projects you want to work on and what your availability and rate are.
Get your certification
We certify your experience and your use of AI so companies understand and trust what you bring.
Match with projects
We connect you with well-paid projects that fit your expertise and your preferences.
Software Engineering projects that live up to your expectations
Work on real projects, with teams that need your expertise, without wasting time looking for opportunities.
Projects that fit you
Work with companies that need your stack and experience to take their projects to production.
Opportunities that come to you
Our AI matching connects your profile with the projects that fit your preferences.
You build. Shakers handles the rest
Set your own terms based on your seniority. We manage contracts, payments and paperwork.
What a Backend Developer does and by what criteria
Design APIs that scale
REST and GraphQL with a solid contract, idempotency and load control: the foundation the product rests on.
Model and optimise the data layer
Schemas, indexes and caching so the system holds up in production with no latency surprises.
Testing and deployment
Stepping into someone else's code and leaving it better: tests, CI/CD and observability.
A solid backend stack
Real command of at least one ecosystem (Node, Python, Java or Go) and its production patterns.
APIs and data
Good contract design and data modeling, with judgment on consistency and performance.
Testing and deployment
Quality and deployment practices that outlast your time on the project.
Frequently asked questions
Any other questions? Write to us and we will reply.
What backend projects are available?
Building APIs and services, integrations, migrations, architecture refactors and team reinforcement, with verified clients. You choose which ones you work on.
Do I need a specific stack?
We value solid experience in at least one backend ecosystem (Node, Python, Java or Go) and good practices around APIs, data and deployment.
How does payment work?
You agree your rate per project and get paid clearly against milestones, with no hidden fees or margins.
Can I choose the projects?
Yes. AI matching brings you options that fit your profile and your rate, and you decide which ones to accept.
Do I have to master a specific stack?
We value solid experience in at least one backend ecosystem and good API and data design more than a fixed list of technologies.
Can I take on maintenance projects as well as greenfield?
Yes. There are projects from scratch and projects to stabilize or refactor systems in production; you choose which ones you work on.
The projects on offer
Building APIs and services, integrations, migrations, architecture refactors and team reinforcement, all with verified clients. From standing up a service from scratch to stabilizing a system in production.
What counts
Solid experience in a backend ecosystem, good API and data design, and strong testing and deployment practices. Knowing how to step into someone else's code and leave it better than you found it.
How it works
You work project-based and embedded in the client's team, within a human + agent model. You choose the project and the rate; AI matching does the searching for you.
Roles a Backend Developer works with
The backend rarely works alone. These are the roles in the collective it overlaps with most on projects.
Python Developer
Python covers backend and data; many backend projects start here.
AI Engineer
When the product integrates LLMs or agents, backend and AI Engineer come in together.
Salesforce Developer
In enterprise accounts, the backend integrates with platforms like Salesforce via API.
Join the collective and let AI matching bring you the projects that match your stack.
Take the next step with Shakers
Want backend projects with real scope?
Create your profile and start receiving projects that match your stack.
