Senior .NET Developer / Tech Lead
TypeContract
LocationEstonia, Latvia, Lithuania
Posted3 hours ago
Project/Client:Fintech
Location:Lithuania
Start Date:ASAP
Duration:12 months
Language:English
Role Overview:
We’re looking for aSenior .NET Developer / Tech Leadto join our engineering team and build payment-focused backend solutions in a regulated fintech environment. This is a hands-on role combining software development with technical leadership. You’ll design and develop backend services, contribute to technical and architectural decisions, and help the team maintain high engineering standards.
Key Responsibilities:
Design and develop backend services usingC# / modern .NET
Contribute totechnical designandarchitectural decisions
Build integrations withREST APIs, third-party platforms, messaging, and file-based interfaces
Ensure code quality throughcode reviewsand engineering best practices
Mentor developers and leadtechnical discussions
Work withSQL, relational databases,CI/CD, andDocker
Buildsecure, reliable, and scalablesoftware solutions
Collaborate with product, compliance, QA, and other engineering teams
Must-Have Requirements:
7+ yearsof hands-onC# / .NETexperience
Strongbackend developmentexperience
Experience withREST APIs, integrations, anddistributed systems
StrongSQLand relational database experience
Experience withDockerandCI/CD
Understanding ofsecure and reliable software development
Experience as aSenior Engineer,Tech Lead, or similar
Ability to taketechnical ownershipand guide other developers
Nice to Have:
Experience inpayments,banking,fintech, orfinancial services
Experience in aregulated / compliance-driven environment
Knowledge ofISO 20022 / SEPA
Understanding ofclearing,settlement, orpayment processing
Experience withAzureorAWS
What we offer
Model: B2B contract with Bonapolia - one contract, one monthly invoice
Rate: negotiated per candidate seniority and client budget
Payment: monthly invoice, paid on the same schedule the client pays us (usually 30 days)
Contract written under your country's law
We handle the client-side paperwork: MSA, NDA, invoicing
🏢 About Bonapolia
Bonapolia is a family-owned IT staff augmentation team based in Lisbon. We build engineering teams for product companies and IT consultancies across Europe and the US.
More at
📩 Ready to Join?
We look forward to receiving your application and welcoming you to our team!
Originally posted on Himalayas
Location:Lithuania
Start Date:ASAP
Duration:12 months
Language:English
Role Overview:
We’re looking for aSenior .NET Developer / Tech Leadto join our engineering team and build payment-focused backend solutions in a regulated fintech environment. This is a hands-on role combining software development with technical leadership. You’ll design and develop backend services, contribute to technical and architectural decisions, and help the team maintain high engineering standards.
Key Responsibilities:
Design and develop backend services usingC# / modern .NET
Contribute totechnical designandarchitectural decisions
Build integrations withREST APIs, third-party platforms, messaging, and file-based interfaces
Ensure code quality throughcode reviewsand engineering best practices
Mentor developers and leadtechnical discussions
Work withSQL, relational databases,CI/CD, andDocker
Buildsecure, reliable, and scalablesoftware solutions
Collaborate with product, compliance, QA, and other engineering teams
Must-Have Requirements:
7+ yearsof hands-onC# / .NETexperience
Strongbackend developmentexperience
Experience withREST APIs, integrations, anddistributed systems
StrongSQLand relational database experience
Experience withDockerandCI/CD
Understanding ofsecure and reliable software development
Experience as aSenior Engineer,Tech Lead, or similar
Ability to taketechnical ownershipand guide other developers
Nice to Have:
Experience inpayments,banking,fintech, orfinancial services
Experience in aregulated / compliance-driven environment
Knowledge ofISO 20022 / SEPA
Understanding ofclearing,settlement, orpayment processing
Experience withAzureorAWS
What we offer
Model: B2B contract with Bonapolia - one contract, one monthly invoice
Rate: negotiated per candidate seniority and client budget
Payment: monthly invoice, paid on the same schedule the client pays us (usually 30 days)
Contract written under your country's law
We handle the client-side paperwork: MSA, NDA, invoicing
🏢 About Bonapolia
Bonapolia is a family-owned IT staff augmentation team based in Lisbon. We build engineering teams for product companies and IT consultancies across Europe and the US.
More at
📩 Ready to Join?
We look forward to receiving your application and welcoming you to our team!
Originally posted on Himalayas
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