Senior Java engineers for fintech. Vetted by a Java engineer.
We place senior Java and Kotlin engineers, plus AI/LLM specialists, with banks, payment companies and fintechs in Europe and the US. Every candidate is technically interviewed by our founder, not a recruiter.
Shortlist · Payments platform
- JK
Senior Java / Kotlin Engineer
9 yrsJava 17 · Spring Boot · Kafka
System design4.5/5Code review4/5References verified
- MW
Senior AI / LLM Engineer
7 yrsPython · LangChain · RAG · pgvector
System design4/5Code review4.5/5References verified
Illustrative example
Trusted by
JAVA & BACKEND
Senior Java Engineers. Banking-Grade. Production-Proven.
Senior engineers with backgrounds in the systems where downtime is expensive and correctness is non-negotiable.
Regulated Financial Environments
Our engineers have built systems for investment banking and capital markets platforms, including payments, PSD2, ISO 20022 messaging and DORA-aligned operations. They understand audit trails, compliance constraints, and enterprise change governance.
High-Throughput Distributed Systems
Apache Kafka event pipelines, CQRS, event-driven microservices, engineered for scale. Engineers who have owned high-throughput production systems in regulated environments.
End-to-End Technical Ownership
Engineers who lead architecture reviews, define API contracts, own the feature from whiteboard to production deployment, and stay accountable after go-live.
Also: senior Python and Node.js engineers, and small product teams.
Senior Java / Kotlin Engineer
9 Years · Banking & FinTech Specialist
Senior AI / LLM Engineer
7 Years · AI & FinTech Specialist
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Contact usIllustrative profiles. Not a live candidate listing.
AI / LLM ENGINEERS
AI That Ships. Not AI That Slides.
The AI talent market is full of developers who have used ChatGPT. Our engineers have built LLM-powered systems in regulated, production environments.
LLM & Agent Engineering
Custom LLM integration, prompt engineering at scale, multi-agent orchestration (LangGraph, CrewAI, AutoGen). RAG pipelines on real enterprise data with real security constraints.
AI in Financial Services
Engineers who understand compliance, data governance, explainability requirements, and the constraints of regulated environments. Production-safe, auditable ML.
MLOps & AI Infrastructure
Model deployment pipelines, vector database management (Pinecone, Weaviate, pgvector), fine-tuning workflows, and AI observability. From prototype to production infrastructure.
Need AI Capability in a Regulated Product?
If you are scaling an AI product, adding LLM capabilities to an existing platform, or need a senior AI engineer embedded in your team, talk to us before your formal hiring process starts. We move faster.
Book a 30-min call
Kacper Dobosz
Founder, senior Java engineer
WHO VETS YOUR ENGINEER
Every engineer is interviewed by a senior Java engineer, not a recruiter.
I'm Kacper. I've spent 10 years building Java backend systems for banking and payments platforms. I run the technical interview for every engineer we propose myself. If I wouldn't want them on my own team, you won't see their profile.
- 10 years Java/Kotlin
- Warsaw, CET
WHY DEVSTEWARDS
What happens after you sign
Placement is where our work starts, not where it ends.
Monthly check-in
A short call with you and the engineer every month to catch issues early.
Quarterly code review
A senior engineer reviews code quality and shares feedback with you.
Continuity plan
Holiday cover and replacement are agreed up front, not improvised.
One point of contact
You talk to the founder, not a rotating account manager.
OUR STANDARD
How we evaluate engineers before recommending them.
We don't forward CVs. We vouch for people. Every engineer in the DevStewards network has passed all three stages before we propose them to any client.
1. Live system design session
A rigorous technical interview covering system design, architecture decisions, and live coding. We assess for genuine seniority, not just syntax familiarity.
2. Background & reference check
We verify employment history, validate professional references from previous clients or employers, and assess communication and collaboration skills directly.
3. Trial project review
Engineers complete a scoped real-world task. We review code quality, documentation, and delivery reliability before proposing anyone to a client.
Illustrative example
Every engineer passes a live system design session with a senior Java engineer before we present them to you.
THE PROCESS
From first call to first commit, typically within two weeks.
Discovery Call
Tell us what you're building, where the gap is, and what good looks like for your team.
We Match
We send you one or two targeted profiles, not a bulk dump. Each profile is selected for your exact technical and cultural context.
You Interview
You speak directly with the engineer. No account managers in the room. You decide. No pressure, no hard sell.
Contract & Go
Clean B2B service agreement with DevStewards sp. z o.o. Monthly retainer. 30-day notice. EUR or USD invoice. Engineer embedded in your team within days of signing.
Discovery Call
Tell us what you're building, where the gap is, and what good looks like for your team.
We Match
We send you one or two targeted profiles, not a bulk dump. Each profile is selected for your exact technical and cultural context.
You Interview
You speak directly with the engineer. No account managers in the room. You decide. No pressure, no hard sell.
Contract & Go
Clean B2B service agreement with DevStewards sp. z o.o. Monthly retainer. 30-day notice. EUR or USD invoice. Engineer embedded in your team within days of signing.
Built for teams in Europe and the US. Daily overlap with CET and EST.
COMMERCIAL TERMS
Simple, transparent terms.
- Monthly B2B retainer
- Invoices in EUR or USD
- 30-day notice
- You interview every engineer directly before signing
- NDA and GDPR DPA in every contract
- Rates depend on seniority, specialization and allocation
FAQ
Frequently asked questions
GET STARTED
Let's Find Your Next Engineer.
Tell us what you're building and where the gap is. We typically come back with matched profiles within two business days. No recruitment noise, no bulk CVs.
You'll talk to Kacper, founder and senior Java engineer.
Book a 30-Min Call
Pick a time that works, EU or US timezone. 30 minutes, direct conversation, no sales script. We'll tell you honestly if we can help.
Book a 30-min call