Senior Software Engineer – A2P Messaging, Agentic Engineering

Digital New Agency

. Build production-grade software for a new high-volume messaging platform .

Posted 9/18/2026full-timeRemote • PolandSenior💰 PLN 150 - PLN 180 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building production-grade software for high-volume messaging platforms, with strong backend engineering skills in Java/Kotlin and experience in orchestrating AI agents throughout the software development lifecycle. Proficient in handling ambiguity and evolving requirements while ensuring production readiness and operational support.

Highest-signal resume keywords

Backend Engineering ExperienceJava/Kotlin KnowledgeExperience with Telecom or Messaging PlatformsAI Integration Across SDLCExperience with Asynchronous Workflows

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend EngineeringJavaKotlinAI Coding AgentsPostgreSQLHigh-Volume Data PipelinesIdempotent ProcessingMessage BrokersSMPPEvent-Driven Processing

Soft Skills

Problem OwnershipAdaptabilityCollaboration

Tools & Technologies

KubernetesAPIsApplication ServicesObservability ToolsTesting Frameworks

Industry Keywords

CPaaSA2P/SMSRoutingDLRsCDRsBillingPaymentsTransactionally Critical DomainsHigh-Volume Transaction ProcessingInternal Operations Platforms

Tech Stack

Tools & technologies

JavaKotlinKubernetesPostgresReactSDLCTypeScript

About the role

Key responsibilities & impact

Build production-grade software for a new high-volume messaging platform
Own functionality end to end from problem understanding and solution design through implementation, testing, deployment, and production readiness
Work across APIs, application services, PostgreSQL, and asynchronous or event-driven processing
Turn incomplete or evolving requirements into pragmatic technical solutions
Use AI coding agents for exploration, implementation, refactoring, testing, debugging, and documentation
Build observability, testing, and failure handling into solutions
Collaborate with senior engineers, SREs, and the architect on technical decisions and production behaviour
Contribute to a modular architecture enabling parallel work by engineers and AI tooling
Support the platform through production readiness, migration, and operation

Requirements

What you’ll need

Experience with telecom, messaging, CPaaS, or carrier platforms
Knowledge of A2P/SMS concepts such as SMPP, routing, DLRs, CDRs, rating, or wholesale messaging
Minimum 5 years of commercial backend engineering experience
Strong backend engineering experience
Java/Kotlin knowledge; openness to candidates with other programming languages
Experience using AI across the full SDLC
Ability to orchestrate and supervise AI agents
Proven ability to own problems end to end
Ability to work with ambiguity and incomplete requirements
Ability to move quickly while maintaining engineering standards
Professional English
Experience with billing, payments, metering, or transactionally critical domains is advantageous
Experience building high-volume data pipelines and idempotent processing is advantageous
Experience with message brokers, asynchronous workflows, or high-volume transaction processing is advantageous
Experience with Kubernetes-based production environments is advantageous
React/TypeScript experience is advantageous
Experience building internal operations or back-office platforms is advantageous
Experience supporting production incidents, migrations, or cutovers is advantageous

Benefits

Comp & perks

Fully remote work option in Poland
Greenfield platform ownership and end-to-end responsibility
Direct collaboration with senior engineers, SREs, and architect
High autonomy and responsibility
Small senior engineering team with short decision paths
Agile and DevOps working environment
Psychological safety and diversity-focused workplace
Opportunity to build a production platform from scratch
Longer-term involvement through migration, production operation, and further development